96results about How to "Speed up smelting" patented technology

The invention relates to a nonferrous metal, and in particular relates to a smelting method of lead concentrate containing antimony and zinc. The smelting method is characterized in that in the smelting process, oxidizing smelting is performed to the lead concentrate containing antimony and zinc in a slagging furnace to generate a flue gas containing SO2, smelting dust and slagging furnace slag; then reduction smelting is performed to the slagging furnace slag in an electric furnace to generate a lead-antimony alloy, a flue gas and slag, and after the slag and the lead-antimony alloy are clarified and layered, the lead-antimony alloy is discharged from a lead discharge hole; and zinc oxide is recycled from the flue gas obtained in the reduction process and then the obtained flue gas is discharged to the outside. The method has the following advantages: the flow is short, continuous production is realized, energy is saved, the production capacity is large, resources can be efficiently utilized, the environment can be protected, the safety and labor hygiene are good, foamed slag has no explosion danger and the production is safe. The smelting method is suitable for not only the treatment of the complex lead materials containing antimony and zinc, but also the treatment of wet method zinc metallurgical slag and lead-precious metal system slag, lead, zinc and antimony are matched mutually, the lead-zinc-antimony combination enterprises are more superior and the recovery rates of lead and the associated valuable metals such as copper and antimony, and precious metals are higher.

The invention discloses a blast furnace chute multi-ring burden distribution, which comprises firstly calculating the distance from the center of furnace burden from the center of a blast furnace after furnace burden fell into an xy plane, secondly deciding largest and smallest burden distribution angles in theory, thirdly deciding the actual burden distribution angles of outer ring and inner ring of ores and coke, fourthly deciding the burden distribution ring number of ores and coke, determining the burden distribution angle of middle ring of ores and coke and the angel difference of adjacent rings, and sixthly determining the burden distribution rings of each ring in ores and coke. The process largely enriches the regulating method on the upper portion of the blast furnace, changes coal gas distribution, effectively increases the coal gas usage of the blast furnace, reduces coke ratio, realizes the stable and long term operation of the blast furnace, has strong loading material capacity, can eliminate furnace burden gravity segregation and the existing of pile top, much reasonably distributes furnace burden, is beneficial for strengthening smelting, and improves the press amount relationship and further increases the air quantity of the blast furnace.

The invention relates to a method and device for continuously treating lead anode slime by bath smelting. The method comprises the following steps: proportionally adding lead anode slime, recycled materials and nut coke as charging materials into an oxygen bottom blowing bullion lead furnace for smelting to generate bullion lead of which the bullion grade is 25-50%, primary slag and primary soot; adding the bullion lead into an oxygen bottom blowing silver-smelting furnace to react to generate oxidizing slag, secondary soot and alloy liquid of which the bullion grade reaches 70-80%; introducing the alloy liquid into an oxygen top blowing refining furnace to react to generate tellurium slag, clear alloy slag, secondary soot and alloy liquid of which the bullion grade reaches 96-98%; and discharging the oxidizing slag, then enabling the oxidizing slag to enter a slag bullion lead furnace, and adding the nut coke to react to generate low-grade bullion lead, secondary slag and secondary soot, wherein the low-grade bullion lead is returned for proportioning. The invention realizes the continuous treatment of the anode slime, strengthens the smelting process, improves the direct recovery rate of the bullion, lowers the production cost, reduces the environmental pollution, and shortens the treatment period of the anode slime.

The invention relates to a paste solder for the hard soldering of a SiCp / Al composite material and a preparation method and use method thereof, and relates to a solder for the hard soldering of the SiCp / Al composite material and a preparation method and use method thereof. The paste solder for the hard soldering of the SiCp / Al composite material aims at the problem that the traditional strip-shaped solder or foil-shaped solder is adverse to the automation in a hard soldering process and is not suitable to weld an irregular, small-sized or geometrical complicated part. The paste solder for the hard soldering of the SiCp / Al composite material is prepared by mixing solder alloy powder, a soldering flux and an adhesive. The preparation method comprises the following steps of: 1, preparing the solder alloy powder; 2, preparing the soldering flux; 3, preparing the adhesive; and 4, mixing to prepare the hard soldering of the paste solder for the SiCp / Al composite material. The use method comprises the following steps of: adopting coating type cloth or needle tube type cloth; and then carrying out vacuum heating treatment so as to complete welding. The preparation method disclosed by the invention is mainly used for preparing the paste solder for the hard soldering of the SiCp / Al composite material.

The invention relates to a process for dually continuously producing molten steel by using an iron-containing material rotary hearth furnace, which comprises the following steps: forming a molten pool in a smelting furnace in advance, and blowing a carbon-containing material and oxygen to form foam slag; reducing the iron-containing material to form an iron-containing material of which metallization rate is 90 to 97 percent and temperature is between 900 and 1,200 DEG C through the rotary hearth furnace, and feeding the iron-containing material into the smelting furnace through a high-temperature feeding system to be smelted and reduced; blowing high-temperature oxygen or oxygen-enriched air to combust with CO produced by the smelting furnace; continuously pouring the molten steel into an oxygen blowing furnace through a siphon port, adding a little amount of fusing agent into the oxygen blowing furnace to perform slagging, desulfuration and dephosphorization, and blowing oxygen by using a plug-in oxygen gun to further adjust the content of C in the molten steel and the temperature so as to obtain the molten steel directly supplied to an LF or RH refining furnace. The process has the advantages of high production rate, high thermal efficiency and long furnace service life, implements direct production of the molten steel from ores or iron-containing materials by using continuous steel making equipment consisting of the rotary hearth furnace, the smelting furnace and the oxygen blowing furnace, saves equipment and capital construction investment, saves the land, simplifies material flow, and is easy for serialization and automatic control of the production.

The invention belongs to the technical field of antimony smelting in the industry of non-ferrous metal metallurgy, and particularly relates to a technology and a device thereof adopting bottom blowing molten bath for antimony reduction and smelting in the process of antimony smelting, wherein the bottom blowing molten bath smelting technology is adopted, antimonial raw material and burden are uniformly blended according to a suitable proportion and fed into a molten bath antimony smelting furnace for smelting to carry out reduction and slag making reaction; oxygen, nitrogen, natural gas or coal gas are fed into the melt through a gas spray gun from the bottom part or bottom side part of the molten bath antimony smelting furnace; the gas is combusted to release heat, so as to ensure the temperature of the furnace, participate in the oxidation and reduction reaction of the burden, and vigorously blend the melt, as a result, the heat and mass transfer and reaction speed in the smelting furnace can be improved, the burden can be quickly reacted to produce lean antimony slag, crude antimony and flue gas, the antimony can be continuously processed, and the slag type with little corrosion on the refractory material is produced. The technology and the device have the advantages of low investment, energy consumption and cost, high automation degree and environmental protection.

The invention provides a furnace charge for vanadium-titanium magnetite blast furnace smelting and a blast furnace smelting method. The furnace charge comprises a vanadium-titanium agglomerated ore and a vanadium-titanium pellet ore. The vanadium-titanium agglomerated ore is produced from a mixture of a vanadium-titanium iron concentrate and a common iron concentrate through sintering. The vanadium-titanium pellet ore is produced from a vanadium-titanium iron concentrate or a mixture of a vanadium-titanium iron concentrate and a common iron concentrate through roasting. The common iron concentrate is a vanadium-free and titanium-free iron concentrate. In the invention, the present furnace charge only comprises a vanadium-titanium agglomerated ore and a vanadium-titanium pellet ore and a common lump ore is not utilized in smelting processes, thus a clinker production rate is increased. Through the present furnace charge, a droplet interval and a maximum pressure difference of a stock column are reduced and it is shown that a cohesive zone of blast furnace smelting processes is low and a permeability of the stock column is improved. Therefore, blast furnace smelting is intensified and blast furnace charge smelting performances are improved.

The invention relates to a method for quickly low-consumption producing low-phosphorous special steel through a converter. Through applying remaining slag operation in a converter double-slag method to a single slag operation mode, slag charge and steel consumption and energy medium consumption of single slag operation are further reduced, and meanwhile, the waste gas and waste slag discharge amount in the whole smelting process is further reduced; based on the specialty of a simple and short operation flow and convenience in production organization of a single slag process, the specific low-phosphorous-grade steel smelting period is greatly shortened, and the production process controllability is remarkably improved; in addition, the operation further provides a foundation on increasing the steel scrap proportion in a raw material structure and improving the applicability of a smelting method for raw materials; and in addition, in the smelting process, through adjusting a slag ingredient structure, the reduction of furnace lining erosion and the stability of a furnace profile are favorably realized, and positive and favorable conditions are created for the stable operation of allsteel grade production process.

The invention relates to a method for smelting crude lead in an oxygen-enriched side-blowing smelting furnace, belonging to the technical field of lead smelting. The method comprises the process steps of: 1) crude lead material preparation: proportioning lead-containing materials, quartz stones and limestone flux according to silicate degree being 0.9-1.3 percent, evenly mixing and crushing the lead-containing materials and the flux to grain size being less than or equal to 40mm; 2) crude lead smelting preparation: melting partial crude lead materials to a depth of 300-400mm in the oxygen-enriched side-blowing smelting furnace; and 3) crude lead smelting: continuously feeding the crude lead materials into a hearth and then controlling smelting air-coal ratio, temperature and high-pressure oxygen-enriched air supply, wherein molten lead sinks down and automatically flows into a furnace bed for heat preservation and storage through a siphon port, the molten lead automatically flows into a casting mold to form ingots when the depth of the stored molten lead reaches an overflow port, and the accumulated floating lean slag is discharged and is introduced into the crude lead material preparation process. The method for smelting crude lead in the oxygen-enriched side-blowing smelting furnace has the advantages that the investment is small, the smelting efficiency is high, the energy consumption is low, the arrangement is facilitated, the treatment capacity is high, the method is suitable for mass production, the materials are not required to be granulated, bricked, dried and stored, and the quantity of flue dust is small.

The invention discloses an aluminum bar smelting and casting process which comprises the following steps: S1, preparing aluminum ingots and auxiliary materials, and sequentially adding into a smelting furnace; S2, smelting the aluminum ingots and the auxiliary materials at 900-970 DEG C to obtain an aluminum solution, wherein the temperature of the aluminum solution is 700-760 DEG C; S3, after the aluminum ingots are sufficiently molten, stirring, and removing slag; S4, putting a refining agent into a blow gun, and refining while blowing in the refining agent with nitrogen gas, wherein the temperature of the aluminum solution after refining is 730-760 DEG C; S5, casting at 710-730 DEG C to obtain cast bars; and S6, inspecting the cast bars, sawing, and warehousing. According to the invention, the aluminum bar smelting and casting process improves the aluminum alloy smelting and casting quality, and ensures the product quality and production efficiency.

The invention provides a vanadium-titanium magnetite blast furnace iron-smelting furnace burden and a smelting method thereof. The furnace burden comprises the following components in parts by weight: 65-75 parts of high-chromium and high-titanium vanadium-titanium sinters, 25-30 parts of high-chromium vanadium-titanium pellets and 2-5 parts of common lump ores with particles of 10-50mm, wherein the high-chromium vanadium-titanium sinters are prepared through sintering high-chromium and high-titanium vanadium-titanium magnetite concentrates, common iron ores, a fuel and a flux with a mass ratio of (40 to 50): (20 to 40): (4 to 5): (10 to 15); the mass content of Cr2O3 in the high-chromium and high-titanium vanadium-titanium magnetite concentrates is 1.0-1.9%, and the mass content of TiO2 is 12-13%; the high-chromium vanadium-titanium pellets are prepared from high-chromium and high-titanium vanadium-ferrum magnetite concentrates and bentonite with a mass ratio of (97 to 99): (1 to 3); and the mass content of TFe in the common lump ores is 40-50%, and the mass content of SiO2 is 15-25%. The furnace burden is capable of realizing blast furnace intensified smelting, and high in blast furnace utilization coefficient.

The invention discloses a casting and smelting additive which is prepared from the raw materials including 10-15 parts of sodium oxide, 3.5-8.5 parts of aluminum oxide, 3.5-8.5 parts of potassium oxide, 6-11 parts of sodium carbonate, 3-9 parts of silicon dioxide, 11-18 parts of calcium oxide, 1.5-8.5 parts of iron oxide, 0.5-2 parts of titanium dioxide, 3.1-5.5 parts of olefinic thermoplastic elastomer, 1.2-3.3 parts of dysprosium oxide and 5-10 parts of anhydrous sodium borate. The additive has the advantages of low cost, no toxin, no harmful ingredient and no environmental pollution; because the liquidity of molten steel can be increased during smelting, the air pores and the slag eyes of finished casts can be reduced, the compression strength and the tensile strength of the casts can be increased, and thus, the finished cast rate is increased from 90% to 98%; the bridging phenomenon of a poured material can be avoided during smelting; residues can not be stuck to the furnace wall during smelting, the service life of the furnace body can be prolonged by 20%, the smelting time can be shortened by 1 / 3, the power consumption can be greatly saved, and the enterprise revenue can be increased.

The invention provides a method for preparing an Al-Si-Fe alloy by preprocessing a waste fireproof material and carbon thermal reduction. The method for preparing the Al-Si-Fe alloy by preprocessing the waste fireproof material and carbon thermal reduction comprises the steps that the waste fireproof material, waste negative electrode carbon blocks and paper pulp dry powder are uniformly mixed andmade into powder; then the mixed material is compressed into pellets, high temperature vacuum distillation is conducted so that fluoride in the waste fireproof material and the waste negative electrode carbon blocks volatilize, then the fluoride is separated from the waste fireproof material and the waste negative electrode carbon blocks, and meanwhile, cyanide in the waste negative electrode carbon blocks is decomposed; then distillation residues are smashed and dispensed and mixed with coal ash, and fixed carbon in the waste negative electrode carbon blocks is adopted as a reducing agent inan electric arc furnace so that high temperature reduction can be conducted on a material with aluminum oxide and silicon oxide being the main components, and then the Al-Si-Fe alloy with certain components is prepared; and meanwhile, decomposition of aluminum nitride in aluminum ash and total decomposition of cyanide in the waste negative electrode carbon blocks are completed in the high temperature reduction process, and comprehensive utilization of multiple hazardous wastes and solid wastes is achieved in the same technology.

The invention discloses a spinel glass ceramic and a preparation method thereof. The spinel glass ceramic comprises a basic component, a tin-containing oxide, a coloring agent and a fluxing agent, wherein the tin-containing oxide accounts for 0.1-2% of the mole percentage of the basic component; the coloring agent accounts for 0-3% of the mole percentage of the basic component; the fluxing agent accounts for 0-3% of the mole percentage of the basic component; and the basic component comprises the following components in percentage by mole: 43-60% of SiO2, 16-28% of Al2O3, 10-25% of ZnO, 5-12% of TiO2 and / or ZrO2 and 1-8% of MgO and / or a rare-earth oxide. The spinel glass ceramic disclosed by the invention is an artificial jewel material, is short in production time and high in efficiency, and the prepared spinel glass ceramic is good in thermal resistance, high in hardness, good in refractive index, capable of meeting requirements of jewel wax setting and applicable to industrial production.

The invention provides a method for smelting with an electric furnace. The method comprises the following steps: 1, adding a first iron and steel scrap material to the electric furnace, and adding lime to the iron and steel scrap material according to a case that 40-45kg of lime corresponds to each ton of the iron and steel scrap material; 2, blowing oxygen by an oxygen lance when the iron and steel scrap material near the oxygen lance melts or the iron and steel scrap material adjacent to the molten iron and steel scrap material is heated to hot heat; 3, starting blow carbon powder blowing when the power supply energy reaches 140-160kWh / tsteel; 4, stopping oxygen blowing and carbon powder blowing when the power supply energy reaches 185-215kWh / tsteel, and adding a second iron and steel scrap material to the electric furnace; 5, blowing oxygen by the oxygen lance when the iron and steel scrap material near the oxygen lance melts or the iron and steel scrap material adjacent to the molten iron and steel scrap material is heated to hot heat; 6, starting blow carbon powder blowing when the power supply energy reaches 165-185kWh / tsteel; 7, keeping the oxygen supply amount with the oxygen lance at 1.0-1.1m<3> / min.tsteel when the temperature of a molten pool reaches greater than 1565DEG C, and carrying out carbon powder blowing with a carbon spraying lance with the speed of 0.47-0.58Kg / min.t to prepare foamed slag; and 8, stopping oxygen supply and carbon powder blowing when the temperature of molten steel reaches 1620-1660DEG C to obtain molten steel containing low phosphor.

The invention discloses a method for smelting a lead-bismuth concentrate in an oxygen-rich side-blown duplex furnace, belonging to the technical field of smelting bismuth concentrates. The method comprises the steps of preparing raw materials, and smelting in the oxygen-rich side-blown oxidation-reduction duplex furnace to directly produce a crude bismuth alloy. According to the method, scrap iron is not required to be added, so that the production cost is low; the concentration of SO2 in flue gases generated from oxidizing smelting reaches 10 to 25 percent, and the SO2 can be recycled to prepare acid, so that the problem of environmental pollution caused by the flue gases is solved; and the oxidation-reduction duplex smelting ensures that the direct yield of bismuth is greatly promoted.

The invention discloses an antimony bottom blowing blast volatilization smelting technology and a antimony bottom blowing blast metallurgical furnace. The antimony bottom blowing blast volatilization smelting technology the steps as follows: supplying heat by coking coal or lump coal, supplying air and oxygen into a hearth by a fan, adding coal and antimony ore burden into the hearth from the top or the upper side surface of the furnace body, allowing flue gas to enter a condensation dust-collection system from the upper side surface or the top of the furnace body, and enabling the air of the fan to blow into the hearth from bottom to top after the air is distributed at the bottom of the hearth. The antimony bottom blowing blast metallurgical furnace comprises the furnace body, a forehearth and a tuyere. The furnace body comprises the hearth, a water jacket and a slag through way, wherein one end of the slag through way is connected with the bottom of the hearth, while the other end of the slag through way is connected with the forehearth; the tuyere is arranged at the bottom of the hearth; and the fan supplies air upwards from the bottom of the hearth through the tuyere. The utilization rate of air is improved and the daily treatment capacity is increased obviously; the uniform distribution of air flows plays a very obvious effect in improving the burning effect of fuel; the fuel burns sufficiently; the furnace temperature rises; the smelting process is strengthened; the daily treatment capacity is improved; antimony is voltilized and oxidized sufficiently; the content of antimony in slag is lowered obviously; and the recovery rate of metal is enhanced remarkably.

The invention provides a method for preparing an aluminum-silicon-iron alloy by virtue of aluminum-ash pre-treatment carbothermic reduction. The method comprises the following steps that secondary aluminum ash, waste cathode carbon blocks and paper pulp dry powder are uniformly mixed and are made into powder, then the mixture is pressed into pellets, and is subjected to high-temperature vacuum distillation, so that fluoride and chloride in the aluminum ash as well as fluoride and metal sodium in the waste cathode carbon blocks are volatilized and then are separated from the aluminum ash and the waste cathode carbon blocks respectively, and meanwhile, cyanide in the waste cathode carbon blocks is decomposed; then distillation residues are smashed, the smashed distillation residues are matched and mixed with fly ash, high-temperature reduction is conducted on a material mainly composed of aluminum oxide and silicon dioxide in an electric arc furnace by taking fixed carbon in the waste cathode carbon blocks as a reducing agent so as to prepare the aluminum-silicon-iron alloy with certain components; and meanwhile, decomposition of aluminum nitride in the aluminum ash and complete decomposition of the cyanide in the waste cathode carbon blocks are completed in the high-temperature reduction process, and the comprehensive utilization of various kinds of dangerous waste and solid waste is realized in the same process.

The invention provides a method for preparing an aluminum silicon iron alloy through hollow electrode feeding by using a waste refractory material as a raw material. The waste refractory material is used as the raw material, an aluminum cell waste cathode carbon block is used as a reducing agent, pulverized fuel ash is used as an additive to adjust the aluminum content in the raw material, kieselguhr waste residues are used as an additive to adjust the silicon content in the raw material, and high temperature reduction is carried out on materials with aluminum oxide and silicon oxide as main in an electric-arc furnace to prepare the certain-component aluminum silicon iron alloy; and a hollow electrode is used for transporting powder materials, the entire electric-arc furnace smelting process can be strengthened, reduction of oxide and volatilization of fluoride are promoted, the decomposition of toxic substances cyanide and volatilization and recovery of the fluoride, chloride and alkali metals in the materials are especially accelerated, the production efficiency is improved, the production cost is reduced, and comprehensive utilization of a variety of hazardous waste and solid waste in the same process is achieved.

The invention discloses a silicomanganese efficient absorption alloy ball. Silicomanganese alloy, silicon iron, manganese ore, high alumina cement and a binder are mixed and made into the alloy ball with the particle size of 20 millimeters to 50 millimeters. The alloy ball replaces the traditionally used alloys such as silicon iron, high carbon ferromanganese, and the silicomanganese, and enables the cost of steel per ton to be obviously reduced. The alloy ball not only can improve the efficiency of silicon and manganese and the recovery rate of alloy can be increased, but also can completely replace the traditionally used alloys such as the silicon iron, the high carbon ferromanganese and the silicomanganese. The deoxygenation response is fast, the alloying speed is high, cost consumption of raw and auxiliary materials can be reduced, environmental pollution is reduced, working condition is improved, and steel-making cost is reduced. Therefore, the silicomanganese efficient absorption alloy ball and the preparation method of the silicomanganese efficient absorption alloy ball play a significant role in improvement of comprehensive economic benefits of steel enterprises.

The invention discloses a vacuum induction melting method for a titanium-aluminum alloy target material. The method employs a CaO crucible to perform vacuum induction melting to prepare titanium-aluminum alloy, and sequentially includes the steps of: batching, drying, furnace charging, alloy melting, and casting. The method provided by the invention has the advantages of simple process, short production cycle, low energy consumption, small equipment investment, low production cost, accurate control of alloy composition, small crucible pollution, low gas content, and no subcutaneous blowhole or other casting defects.

The invention discloses a smelting furnace heated through combination of heavy oil burning, gas burning and electric arc heating. The smelting furnace comprises a furnace body arranged on a furnace base, the furnace body comprises a side wall, a furnace top, and a fire resistant furnace bottom arranged on the furnace base; a hearth of the furnace body is divided into two parts including a smelting area and a settling area, a furnace bottom of the settling area is lower than a furnace bottom of the smelting area, the furnace bottom of the smelting area adopts an inclined type, one end, adjacent to the settling area, of the smelting area tilts down and is communicated with the settling area, a feed port is formed in a furnace top at one end, far from the settling area, of the smelting area, burners are arranged on opposite two side walls in the smelting area, a graphite electrode penetrating through the furnace top is arranged on the settling area, and a slag discharge port and a hot metal discharge port are respectively formed in the bottom of the settling area. The smelting furnace combines the advantages of gas burning heating and electric arc heating, and has the advantages of low smelting cost, environmental friendliness, high product quality, high handling capacity of single furnace, wide applicability of raw materials, high recovery rate and the like.

The invention relates to a method for purifying polycrystalline silicon by using an electron beam smelting furnace. The method comprises: adding unit amount of a silicon material to each smelting crucible every time, smelting the unit amount of the silicon material for a first predetermined time period according to a first predetermined power by controlling an electron beam gun, repeatedly performing the previous steps until the amount of the silicon material added to the smelting crucible is corresponding to a predetermined amount, smelting for a second predetermined time period, making the molten raw materials of the two smelting crucibles sequentially and alternately flow into a water cooling copper crucible, and scanning the inflowing raw material by using the electron beam gun positioned above the water cooling copper crucible in an area-changing surface scanning manner, wherein it is ensured that the molten pool exists in the water cooling copper crucible, such that impurities are continuously collected in the molten pool and volatilize; after the water cooling copper crucible is completely filled with the raw material, reducing the power by controlling the electron beam gun positioned above the water cooling copper crucible in a constant-area surface scanning manner, and collecting the impurities in the silicon ingot to the center of the top portion of the silicon ingot; and cooling, discharging the ingot, and sawing the impurity enriching zone so as to obtain the polycrystalline silicon.

The invention discloses a method for smelting chromium-containing ferronickel through laterite nickel ore. Nickel sulphide ore, a chromium-containing material and stainless steel smelting waste slag with a certain proportion are added into the laterite nickel ore, a rotary kiln pre-reduction-electric furnace process is adopted for smelting, a chromium-containing ferronickel product is used for producing 300-series austenitic stainless steel, the nickel sulphide ore and the chromium-containing material can serve as a part of a nickel source and a chromium source to improve the nickel and chromium grade in an alloy smelting product, other components in the nickel sulphide ore and the chromium-containing material are matched with multiple components in other stainless steel smelting waste slag to serve as a slag forming constituent to adjust the furnace slag smelting property, the reduction condition of chromium oxides can be improved, and separation of metal and slag can be reinforced. The method can improve the chromium grade and the chromium recycling rate in the ferronickel product, the smelting energy consumption can be greatly reduced, multiple metallurgical waste slag in the stainless steel production process can be sufficiently used, secondary resource recycling can be achieved, enterprise production cost is reduced, and the environment pollution brought by the metallurgical waste slag can be removed.

The invention relates to the technical field of steel making, in particular to a steel making system and method. The method comprises the following steps: step 1, putting steel into a smelting cavity to increase weight of the smelting cavity, driving a pressurizing circular plate to move downwards, enabling an additive in a storage barrel to flow into a suspending barrel through a communicating slide tube, and starting an electric-arc furnace in a storage cavity to melt; step 2, starting an electric motor when the steel is gradually softened, and driving two groups of stirring plates to stir through engaged transmission of a gear II and two gears II to increase smelting speed of steel, and injecting oxygen gas into the smelting cavity through a gas inlet tube at regular intervals during stirring; step 3, opening a valve when the temperature of the steel is high enough, introducing the additive in the suspending barrel into the smelting cavity through a circulating inclined tube to increase smelting speed of steel again; and step 4, after the steel is completely molten, opening a valve on a liquid outlet tube for discharging molten steel from the liquid outlet tube through a telescopic empty tube.

Disclosed are a fuel gas ignition jet tube and a submerged arc furnace utilizing the same. The fuel gas ignition jet tube extends into the submerged arc furnace and comprises an oxidizing air tube, a gas tube and a gas mixture nozzle, the gas tube is arranged in the oxidizing air tube, the gas mixture nozzle is arranged at the bottom of the gas tube and comprises a nozzle body and spiral airflow adjusting plates, the nozzle body comprises a converging portion and a diffusing portion, the spiral airflow adjusting plates are arranged on the outer wall of the converging portion at intervals, gas outlets are formed in the diffusing portion at intervals, the diffusing portion forms a gas outlet end face of the oxidizing air tube, an air passage is formed between the inner wall of the oxidizing air tube and the outer wall of the gas tube, an inner cavity of the gas tube serves as a gas passage, the air passage is communicated with an air connection tube, a gas passage is communicated with a gas connection tube, a gas mixing area is formed below the gas mixture nozzle, gas passes through the gas passage and then exhausted via an inner cavity of the nozzle body to the gas mixing area, and air passes through the air passage and exhausted via the gas outlets of the diffusing portion to the gas mixing area. The fuel gas ignition jet tube has the advantages that combustible gas can enter the submerged furnace, inner temperature of the submerged furnace can be kept, and energy conservation and emission reduction are realized.

The present invention provides an ore-smelting electric furnace slag layer thickness detection device and an ore-smelting electric furnace slag layer thickness detection method. The detection device comprises a first electrode; a second electrode; an electrode elevating control system used for controlling the end part positions of the first electrode and the second electrode to be consistent and elevating in a slag layer; an electrode electrical control system used for applying a DC voltage between any two of the first electrode, the second electrode and the ground and obtaining a corresponding current value; an electrode automatic control system electrically connected with the electrode elevating control system and the electrode electrical control system and used for obtaining the earth impedance of the first electrode and the transverse impedance between the first electrode and the second electrode. The detection device and the detection method of the present invention, on one hand, save the manpower and enable the slag layer thickness detection accuracy and efficiency to be improved, on the other hand, are few in parameters needed to determine the slag layer thickness, and the detection method is simpler and easier to realize.

The invention provides silver-based alloy bonding wire alloy material smelting equipment, and relates to the field of binding wires. The silver-based alloy bonding wire alloy material smelting equipment comprises a vacuum smelting furnace body used for smelting an alloy material, an alloy smelting mechanism for smelting the alloy material and an alloy smelting and casting mechanism for performingpreliminary pouring on a molten alloy; and the bottom of the vacuum smelting furnace body is fixedly connected with supporting legs, and the top of the vacuum smelting furnace body is in an open state. According to the silver-based alloy bonding wire alloy material smelting equipment provided by the invention, according to the realistic problems existing in the smelting process of existing silveralloy bonding wire materials, a special smelting mechanism that can quickly separate solid and liquid in a layered state and continuously increase the smelting speed as metal changes is developed, andthe problems that a conventional smelting furnace is difficult to realize real-time solid-liquid separation when the smelting furnace is used, the direct transfer of temperature is influenced, materials are easily distributed unevenly due to the influence of the shape and materials during the smelting process, and the smelting efficiency is influenced are solved.

The invention discloses a waste recovery device for 3d printing is characterized by comprising a device bottom plate, a first device shell, a material collecting box and a feeding port, the first device shell is located at the top end of the device bottom plate, the feeding port penetrates into the first device shell, and the material collecting box penetrates into the bottom end of the interior of the first device shell; and a second device shell is installed at one end of the first device shell, and a driving motor connected with the second device shell is installed at one end of the second device shell. A driving motor drives a second rotating rod to drive a second gear in the second device shell to drive a first gear to rotate, and when the first gear rotates, a first grinding wheel is driven to rotate; and when the first grinding wheel and a second rotating rod rotate, the first grinding wheel and a second grinding wheel are driven to grind and crush waste materials entering the device, so that the smelting speed of the device can be better increased when the device is used.

The invention discloses a smelting method capable of shortening the Consteel electric furnace smelting cycle. According to the method, the smelting process is divided into a slag melting period, a dephosphorization period and a carbon blowing and temperature rising period; furthermore, the dephosphorization rate in the smelting process is influenced by different slag system components in the slagmelting period and the carbon blowing and temperature rising period, wherein in the slag melting period, the temperature starts from 1300 DEG C and is increased to 1520 DEG C at constant speed, and slag I is added when the temperature in the furnace reaches to 1450 DEG C, so that the target slag system components in the dephosphorization period are that the FeO content is less than or equal to 25percent by weight, the MgO content is 4 to 5 percent by weight and the slag basicity R is equal to 2.5 to 3.0; in the dephosphorization period, the temperature starts from 1520 DEG C and is increasedto 1580 DEG C at constant speed, and the process enters the carbon blowing and temperature rising period when the components of steel samples meet that carbon is more than 0.35 percent by weight and phosphorus is less than 0.030 percent by weight; and in the carbon blowing and temperature rising period, the temperature starts from 1580 DEG C and is increased to 1650 DEG C at constant speed, slag II is added at the beginning, so that the components of the target slag system in the carbon blowing and temperature rising period are that the FeO content is 15 to 20 percent by weight, the MgO content is 4 to 5 percent by weight and the slag basicity R is equal to 3.0 to 3.5. The smelting method capable of shortening the Consteel electric furnace smelting cycle has the following beneficial effect: the dephosphorization rate in the electric furnace smelting process is influenced by different slag system components, so that the smelting period is shortened.