52results about How to "Small scale of production" patented technology

The present invention belongs to the field of steel production, and relates to a method of replacing lime with limestone for slagging and producing steel in an oxygen top blown converter. The invention is characterized in that the limestone is directly added during slagging in the steel production process. The added batch number is increased and the amount of each batch of material is reduced. Namely the lime is added by 1-3 times for slagging formerly, and when the limestone is added for slagging, the limestone is added by 4-8 times. The adding amount of each time, calculated according to the CaO therein, is 1 / 2-1 / 3 of lime added formerly and is for preventing the condensing and incrusting at the metal surface in the furnace in the early period of converting. The adding amount of limestone, calculated according to CaO therein, accounts for 30%-100% of adding amount of lime in the batch. The method of the invention has the main advantages of elimination of lime calcining procedure or reduction of production scale, reduction of cost required for operating the calcining device and reducing the discharged pollution, prevention of heat waste caused by cooling the lime after calcining, low sulfur content in the lime generated in the oxygen top blown converter, and benefit for restraining resulfurization of melted iron in the steel production process.

A process for preparing ammonium polyphosphate includes such steps as proportionally mixing polyphosphoric acid with the condensating agent chosen from urea, ammonium dicarbonate, melamine, bicynoamine, ammonium sulfate and their mixture, and reacting at 100-500 deg.C under 0.01-0.35 MPa for 5-210 min.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for slagging steelmaking by side blowing of powder particle limestone in a top-bottom combined blown converter. The method of the invention comprises the following steps: arranging at least one side blowing spray gun at one side of a converter trunnion center line, wherein the installation site of the side blowing spray gun is located between a molten pool liquid level and a level 500 mm below the liquid level, an angle between the installation range of the side blowing spray gun and the installation site tangent plane is 10 degrees-75 degrees, the side blowing direction of the spray gun is that the included angle between the side blowing spray gun center line and a horizontal line is 10 degrees-60 degrees, the spray gun faces the bottom of the molten pool, the insertion depth of the side blowing spray gun is 0.1-0.6 times larger than the radius of the molten pool; blowing powder particle limestone with carrier gas through a center pipe of the spray gun by using the side blowing spray gun, blowing protective gas around the circular seam. The method of the invention directly sprays powder particle limestone into the molten pool through the side blowing spray gun; the limestone rapidly decomposes and rapidly participates in slagging reactions; limestone taken away by converter furnace gas is reduced; dust is minimized; and the utilization rate of limestone is improved.

The invention discloses an inkless ecological hot baking printing method and a printing head device. Ordinary printing paper is used, a printing head and the paper adopts either a direct contact mode or a non-direct contact mode. The inkless ecological hot baking printing method and the printing head device are characterized in that a heating element is arranged on the printing head, the color ofthe surface layer of the printing paper is changed through the heat energy of the printing head, so characters or patterns are formed. During the direct contact, the temperature of the printing head is set into 100 to 1000 DEG C, the stop time of the printing head is 0.1 to 100 ms, during the non-direct contact, the temperature of the printing head is set into 200 to 1000 DEG C, and the stop timeof the printing head is 0.1 to 100 ms. Ink powder or ink or paint is not needed, the printing effect can be reached through hot baking by only adopting the single ordinary printing paper, and good low-carbon energy-saving effects and social benefits are realized.

The invention discloses a biomass-based adsorption material for removing heavy metal ions in water as well as a preparation method and application thereof. The biomass-based adsorption material comprises a base material and inorganic particles, wherein the specific surface area of the biomass-based material is 1m<2> / g-100m<2> / g; the inorganic particles comprise iron-containing inorganic magnetic particles and magnesium-containing inorganic particles; the loading amount of the inorganic particles is 10-70wt% of the total amount of the adsorbent material. The iron-containing inorganic magnetic particles and the magnesium-containing inorganic particles are loaded on the biomass surface through an in-situ co-precipitation method. The compound adsorbent material is capable of removing the heavy metal ions such as Cu<2+>, Cr2O7<2->, Pb<2+> and the like in the water and can be easily removed from the water. Compared with the heavy metal ion adsorbent material in the prior art, a natural and cheap biomass material can be used as an adsorption carrier; the biomass material is green, environmentally friendly and efficient, is capable of enabling the content of the heavy metals in the water to be far lower than the national standard, is easily removed under the action of external magnetic field, and is convenient and extensive in application.

The invention discloses a black talcum powder-shaped suspension calcining and whitening device and a process. A powdery calcined black talc product with the whiteness being greater than 90% is obtained. The process comprises the following steps: firstly, taking black talcum as a raw material, beneficiating, crushing and grinding to obtain black talcum powder; preheating the black talcum powder byadopting a multi-stage series suspension preheater, feeding the preheated black talcum powder into a suspension calcining furnace system for calcining, and combusting and releasing organic matters inthe black talcum powder; and finally, discharging the calcined talcum powder from the suspension calcining furnace system to enter a multi-stage series suspension cooler to be cooled. The device is composed of the multi-stage series suspension preheater, a first-stage cyclone separator, a first-stage suspension calcining furnace, a second-stage cyclone separator, a second-stage suspension calcining furnace, an auxiliary combustion ignition chamber, the multi-stage series suspension cooler, a fluidization cooler and the like, and the whole process of preheating and calcining black talcum powderand cooling finished product calcined talcum powder is completed in a suspension state. The process is advanced, green and energy-saving; the automation degree is high, and intelligence can be achieved; and the single-line production scale can be greatly improved.

The invention relates to a method for extracting metallic thallium from thallium-containing slag, and belongs to the vacuum metallurgy technology field. The thallium-containing slag is adopted to extract the metallic thallium in a vacuum firing furnace based on three-step distillation; the vacuum degree is control between 8 to 40Pa, and the time is 30 to 60 minutes; three-step distillation temperatures respectively range from 450 to 600 DEG C, from 900 to 1100 DEG C, and from 700 to 850 DEG C; the purity quotient of the thallium which is extracted in the vacuum firing furnace can reach more than 99.9 percent; the coefficient of recovery of the thallium can reach more than 90 percent.

A process for preparing ammonium polyphosphate includes such steps as proportionally mixing polyphosphoric acid with the condensating agent chosen from urea, ammonium dicarbonate, melamine, bicynoamine, ammonium sulfate and their mixture, and reacting at 100-500 deg.C under 0.01-0.35 MPa for 5-210 min.

The invention discloses a mushroom planting waste culture medium produced organic fertilizer. A preparation method of the mushroom planting waste culture medium produced organic fertilizer comprises the steps sequentially including, debagging, drying and then crushing mushroom planting waste culture mediums; adding in an appropriate amount of ammonium hydrogen carbonate or powder calcium hydroxideor a mixture of the ammonium hydrogen carbonate and the powder calcium hydroxide, and regulating the pH to 5.5-8.5; proportionally and uniformly mixing the crushed mushroom planting waste culture medium and straw decomposing agent to obtain a mixed material; stacking the mixed material into bars for decomposition, covering the stacked mixed material with plastic films, increasing the stacked mixed material to 60-70 DEG C for continuous fermentation for 7-15 days; uniformly mixing bentonite into the fermented materials, and then performing pelletizing to obtain fertilizer pellets; drying the fertilizer pellets into a drying cylinder to obtain dried fertilizer pellets; cooling the dried fertilizer pellets inside a cooling cylinder to obtain cooled fertilizer pellets; performing grain size screening on the cooled fertilizer pellets to obtain the finished organic fertilizer.

The invention provides a process for stage-by-stage biological dump leaching desulfurization of a high-sulfur-content coal mine. By stage-by-stage biological dump leaching removal of inorganic sulfur and organic sulfur, the process comprises the following steps: dump making, acid balancing, inorganic sulfur removal, neutralization of leachate and organic sulfur removal. The method can fulfill the aim of effectively removing sulfur from the high-sulfur-content coal mine. Compared with conventional physical and chemical methods, the method has the advantages of mild condition, low cost, zero discharge of harmful gas and the like, and has a wide application prospect in the field of coal mine desulfurization.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for slagging steelmaking by side blowing of powder particle limestone in a top-bottom combined blown converter. The method of the invention comprises the following steps: arranging at least one side blowing spray gun at one side of a converter trunnion center line, wherein the installation site of the side blowing spray gun is located between a molten pool liquid level and a level 500 mm below the liquid level, an angle between the installation range of the side blowing spray gun and the installation site tangent plane is 10 degrees-75 degrees, the side blowing direction of the spray gun is that the included angle between the side blowing spray gun center line and a horizontal line is 10 degrees-60 degrees, the spray gun faces the bottom of the molten pool, the insertion depth of the side blowing spray gun is 0.1-0.6 times larger than the radius of the molten pool; blowing powder particle limestone with carrier gas through a center pipe of the spray gun by using the side blowing spray gun, blowing protective gas around the circular seam. The method of the invention directly sprays powder particle limestone into the molten pool through the side blowing spray gun; the limestone rapidly decomposes and rapidly participates in slagging reactions; limestone taken away by converter furnace gas is reduced; dust is minimized; and the utilization rate of limestone is improved.

The invention discloses a method for stabilizing a liquid photosynthetic bacterium living bacterium preparation. A nontoxic, harmless and residual-free polymeric organic medium difficultly utilized byphotosynthetic bacteria is added into a photosynthetic bacterium suspension to prepare the photosynthetic bacterium liquid living bacterium preparation, and the concentration of the polymeric organicmedium is 3.0 to 6.0 g / L. The preparation can be stored in a 4-30 DEG C dark environment for at least 12 months, the appearance color of the liquid preparation has no obvious change, the preparationhas uniform properties, has no obvious liquid preparation bacterium sedimentation stratification phenomenon, and still has high biological activity, and the ability to remove nitrite nitrogen is maintained at 80% or above. The stored living bacterium preparation is miscible with water, and can be easily dispersed in water without obvious bacterial agglomerates. The preparation method of the preparation is disclosed in details, and a new use of xanthan gum and other media in the production of photosynthetic bacterium products is also developed. The method has the advantages of simplicity in operation, low cost, and easiness in large-scale operation.

The invention discloses a method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen, comprising the following steps: mixing and pulpifying chemically precipitated nickel sulfide and high pressure leachate based on the mass ratio of (8-10):1, performing one-stage atmospheric pressure leaching on the pulpified material, removing impurities from one-stage leachate and electrolyzing, producing electrolytic nickel and anolyte, mixing one-stage leached residue with anolyte for secondary pulpifying, further leaching by two-stage high pressure, and returning the obtained leached filtrate to one-stage pulpifying for utilization. The process technique has widely utilized resources, simple technical route, small investment, low energy consumption, no environment pollution, high leaching rate of nickel and cobalt, simple and convenient operation and low production cost, and provides an effective and economical way for producing electrolytic nickel in nickel sulfide concentrates.

The invention relates to a low energy consumption clean paper pulp extracting method and a papermaking process thereof, solving the problems that fibrous raw materials need to be boiled at high temperature and pressure in the pulp preparing and papermaking processes and chemical solutions produce a large quantity of black or red liquid in the pulp preparing and papermaking processes to cause great waste to resources and great pollution to the environment in the prior art. The invention adopts the following technical scheme: the low energy consumption clean paper pulp extracting method is realized by removing impurities from biomass raw materials rich of fiber, crushing, softening and soaking, separating organic matters, grinding and pulping, wherein a softening and soaking solution contains the following components in percent by weight: 10-20 sodium oxide, 3-5 sodium carbonate, 0.5-2.5 penetrating agent T, 0.5 magnesium oxide and 0.05-0.15 chelating agent EDTA. The papermaking processmatched with the method comprises the following steps: getting materials ready, rubbing to devillicate, soaking to react, separating liquid medicine, spirally squeezing pulp, refining with high consistency, removing slag, coarsely screening and making paper. The pulp preparing process has simple course, no high requirements on environment and equipment condition, easily popularized technology, norequirement on the scale of production, low costs for building production lines and purchasing equipment and less running expense.