30results about How to "Steady and straight" patented technology

The invention relates to a method for controlling the abnormal furnace temperature of a blast furnace according to temperature changes of a cooling wall. According to the method, the fall-off positions and the fall-off amount of blast furnace slag crusts are timely identified through the data mining technology according to the temperature conditions of the cooling wall of the blase furnace, cooling water inlet-outlet water temperature change conditions and blast furnace heat load change conditions, then the measures that additional coke is added inside the blast furnace through a furnace top PLC system and the air temperature, the coal powder injection amount and the oxygen enrichment amount of an air blower on the lower portion of the blast furnace are adjusted are further taken to enable the furnace temperature to be controlled to be in a stable level, the stable and smooth operation of the blast furnace is ensured, and the blast furnace can run at the optimum interval. The control accuracy of the abnormal furnace temperature of the blast furnace is improved, and the service life of the blast furnace is prolonged.

The invention provides a high-aluminum and low-magnesium blast furnace smelting raw material and a method for using the charge for high-aluminum and low-magnesium blast furnace smelting, wherein the charge is composed of high-aluminum and low-magnesium sintered ore, pellets and raw ore, and the blast furnace No magnesium-containing ore is added to the burden. The high-alumina and low-magnesium sintered ore is sintered from a mixture of high-aluminum and low-magnesium iron ore powder and sintering auxiliary materials. The pellets are ordinary pellets. The raw ore It is a high-grade iron ore concentrate. The present invention selects high-alumina and low-magnesium sintered ore and ordinary pellets in the blast furnace smelting process, and rationally mixes raw ore. By selecting a suitable blast furnace operation system, the gas flow distribution in the blast furnace smelting process is reasonable, and the performance of the blast furnace slag is good. The smooth discharge of iron keeps the blast furnace running smoothly and reduces the cost of pig iron smelting.

The invention discloses a rotary kiln air-guiding cover structure which comprises an air guiding cover, a rib plate and a barrel. The rib plate is located between the air guiding cover and the barrel;the air guiding cover and the rib plate are welded; the rib plate and the barrel are welded; and the barrel is arranged on a rotary kiln. The rotary kiln air-guiding cover structure is characterizedin that two groups of U-shaped connecting plates are further arranged on two sides of the rib plate and are arranged between the air guiding cover and the rib plate; the other two groups of connectingplates are arranged between the rib plate and the barrel; U-shaped ports of the connecting plates are connected onto the rib plate; threaded holes are correspondingly formed in the connecting plates,the air guiding cover and the rib plate; the connecting plates, the air guiding cover and the rib plate are connected through two-ended bolts in the threaded holes; threaded holes are correspondinglyformed in the connecting plates, the barrel and the rib plate; and the connecting plates, the barrel and the rib plate are connected through countersunk bolts in the threaded holes. The rotary kiln air-guiding cover structure provided by the invention runs stably and reliably under a high-temperature environment, the equipment failure rate is reduced, and the service life is prolonged.

The invention provides an automatic conveyor chain start / stop control method based on a profile steel conveyor chain control system. The automatic conveyor chain start / stop control method is applicable to the technical field of electrical drive control. According to the method, the automatic start / stop control over the advancing step pitch of a conveyor chain is achieved through a circulatory-pulse generator under different duty ratios, automatic start / stop control over the advancing step pitch of the conveyor chain is achieved under the condition of not using a conveyor chain moving positiondetection encoder, the problem that the conveyor chain moving position detection encoder frequently fails due to the poor working environment is solved, and the stable operation of a large H-shaped steel production line is guaranteed.

The invention provides a sintered iron-containing material, a sintered composition, sintered ore and a preparation method of the sintered ore, and belongs to the technical field of blast furnace smelting. The sintered iron-containing material comprises, by mass, 5%-11% of Brazil SFLA fines, 14%-20% of yandi fines, 19.5%-25.5% of Australia PB fines, 20%-25.5% of Brazil BRBF fines, 4%-10% of iron concentrate fines, 8%-12% of iron-containing sundries and 10%-14% of sintered return fines. The sintered composition comprises, by mass, 80%-84% of the sintered iron-containing material, 4%-5% of fuel and the balance solvent. The preparation method of the sintered ore includes the steps that sintering processing is conducted on the sintered composition, and the sintered ore is obtained by sinteringthe sintered composition. The sintered ore good in molten drop performance is obtained by replacing part of fine powder with the Brazil SFLA fines, and cost of sintered ore blending is reduced by effectively using the Brazil SFLA fines.

The invention provides a method for smelting vanadium-titanium magnetite in a blast furnace, which comprises the following steps of: controlling blast kinetic energy, air quantity and air speed of the blast furnace with different furnace volume in different ranges respectively, and forming an air inlet with the length of 450 to 480mm on the two sides of an iron notch of the blast furnace respectively; controlling the blast oxygen enrichment rate in the range of 2.6 to 3.0 percent; controlling the blast temperature in the range of 1,150 to 1,200 DEGC; and controlling the furnace temperature ofthe blast furnace in the range of 1,450 to 1,500 DEG C. By methods of adjusting the blast kinetic energy, blast volume and the blast temperature, controlling feeding rate, the reaction temperature ofthe blast furnace and slag basicity, and the like, the strengthened smelting of the vanadium-titanium magnetite in the blast furnace is realized, the utilization factor of the blast furnace is improved, and iron loss is reduced.

The invention relates to a method for mixing mineral balls, which belongs to the technical field of pellet mixing, and comprises the following steps: 1. reducing the opening of the gate of the weighing bucket; 2. controlling the feeding speed; The program realizes machine-burning and pelletizing, and machine-burning and pelletizing at the same time; 4. Arrange the feeding sequence according to the set distribution matrix; 5. Pass the feeding sequence set in step 4 and mix on the belt. The present invention is applicable to the ratio of 40-60% of the pellets, machine burning + pellets, machine burning + pellets at the same time to achieve the purpose of fully mixing, avoiding the pellets from being distributed to the center and edge, and placing them in the middle of the platform as much as possible Position to prevent the pellets from rolling to the center, and the air flow in the high-temperature pulverization center is suppressed; at the same time, it avoids frequent fluctuations of the furnace wall slag skin and reduces the impact on the furnace condition.

The invention discloses a method for matching coke and adding the coke into a furnace in the blast furnace smelting process. The technology of the method comprises the steps that according to the smelting need, the coke is matched according to the high-low sequence of indexes and added into the blast furnace; according to the indexes from high to low, CSR>M10>the average grain size>M40>the ash content>CRI>the sulfur content; the coke is firstly matched according to the indexes of the highest sequence and added into the blast furnace; if the operation state of the blast furnace is good, coke index modification is stopped; if the operation state of the blast furnace is still poor, the coke is matched according to the indexes of the next sequence and added into the blast furnace; and whether the coke is matched according to the indexes of the next sequence or not is judged according to the operation state of the blast furnace till the operation state of the blast furnace is good. According to the method, the technical aim of adding multiple kinds of coke into the furnace at the same time can be achieved, the situation of excessive coke indexes is avoided, and high-quality coking coal resources are saved; and it is guaranteed that the blast furnace stably and smoothly operates, and meanwhile the ironmaking cost is reduced. The method has the beneficial effects of being simple in technology, high in operability and easy to implement.

The invention provides a red coke quenching method and a coke quenching device, which belong to the technical field of coking. The method includes: water-drawing and quenching the red coke to obtain the first coke; atomizing and quenching the first coke coke to obtain wet quenched coke; in the atomized coke quenching, the relationship between the fog droplets and the first coke temperature conforms to the following relationship: when the temperature of the first coke is ≥400°C, the fog droplets are composed of 30-50% of the volume fraction Composed of air and water droplets with a volume fraction of 50-70%; when the temperature of the first coke is ≥150°C and <400°C, the fog droplets are composed of air with a volume fraction of 60-80% and water droplets with a volume fraction of 20-40% . The coke quenching method provided by the present invention can control the moisture content in the coke to 3.25-3.45%, the moisture content is low, the quality of the coke is improved, and the maximum moisture content is 4.5-4.9%, and the minimum moisture content is 2.1-2.5%. , the fluctuation range is reduced, the moisture is more uniform, and the coke ratio and fuel ratio are reduced due to the guarantee of the smooth running of the blast furnace.

The invention discloses a method for controlling the blast furnace gas flow distribution by using a phased array radar to measure the ore coke ratio of a blast furnace material surface. According to the method, the target O / C ratio distribution curves under different furnace conditions are firstly determined and gas flow adjusting case databases are established, the gas flow adjusting case database is selected and the adjusting principle is determined, the O / C ratio distribution condition of the furnace top material distribution is directly calculated under the premise of consideration of the furnace material descending, the influence of the bottom layer material surface shape, and the influence of the furnace material collapsing, and by comparing the corresponding relationship between the material distribution and the gas flow distribution and by controlling the furnace top gas flow distribution through the targeted material distribution, the precise gas flow adjusting is achieved, and the empirical blast furnace top gas flow control is improved to the quantification level so as to achieve the stable and smooth operating of the blast furnace.

The application relates to a fracture correction device and a track power slide wire system, which belong to the technical field of coke oven electrics. The present application proposes a fracture correction device, including: an installation part, which is used to install on the slide line of the first track; a positioning part, which is located at the end of the fracture correction device away from the installation part, and is used for positioning the second track Slide the line to limit the longitudinal deviation range and lateral deviation range at the fracture. The present application also proposes a track power slide wire system, which includes a plurality of track slide wires connected in series in sequence, a fracture is set between two adjacent track slide wires among the plurality of track slide wires, and each fracture is arranged with one of the above-mentioned Fracture correction device. The use of the fracture correction device at the fracture can effectively prevent the occurrence of fracture faults in the rail power slide line system and ensure the stable and smooth operation of the coke oven vehicle power supply system.

The invention relates to a stable welding method for the argon arc welding of high-silicon-content silicon steel which containing more than 2%of Si, which comprises the following steps: carrying out structural design on a welding inverse electrode for supporting the formation of weld seams, designing an electrode groove in the length direction on the upper surface of the welding inverse electrode, and designing the cross section of the electrode groove into a circular arc, wherein the width of the electrode groove is 4-10mm, the radius of the circular arc is 5.5-15.5mm, and the depth of the arc-shaped electrode groove is 0.6-3.6mm; and welding, and arranging a steel plate to be welded on the welding inverse electrode, wherein the welding seam clearance is 0.4-2.0mm, the welding speed is 1500-2900mm / min, the wire feed speed is 10-35m / min, and the fusion start set value and the fusion stop set value are respectively set to 0.1-1.5s and 0.2-2.0s. The stable welding method for the argon arc welding greatly improves the quality of lower surfaces of welding seams, the infused energy can be diffused more quickly, the abnormal growth of crystal grains can not be found in the thermal reaction region, and the mechanical property of the welding seams is greatly enhanced.

The invention belongs to the reformation field of damaged cooling walls of blast furnaces, relating to a pore channel cooling method of a damaged cooling wall of a blast furnace and a device thereof. The damaged cooling wall is independently separated, a metal corrugated flexible pipe are respectively inserted into a water inlet pipe and a water outlet pipe of the cooling wall, the front end of each metal corrugated flexible pipe is blocked by a core plug, metal corrugated flexible pipes with smaller pipe diameters are then inserted in the metal corrugated flexible pipes, the front ends of the flexible pipes are blocked by core plugs, a plurality of pores are arranged on the core plugs, slurry with high heat conduction factor is filled between the cooling wall and the large metal corrugated flexible pipes, cooling water passes through a cavity formed between the large and small metal corrugated flexible pipes, passes through the pore channels of the small metal corrugated flexible pipes and then flows out of the small metal corrugated flexible pipes, and then the cooling effect is achieved. The invention can improve the phenomena that one part of the cooling pore channels of the cooling wall is burnt out or the channels are small, solve the problem of water leakage, ensure cooling intensity, prolong the service life of the damaged cooling wall and solve a thorny problem restricting the production of the blast furnace.

The invention relates to a method for controlling the cold rolling of high-silicon thin strip non-oriented silicon steel. In the cold-rolled non-oriented silicon steel, by weight percentage: Si≥3.0%, Al≥0.8%, finished product thickness≤0.35mm; During the pass rolling, thickness transition rolling is adopted within 30-50m from the tail of the strip, and at least 2 pairs of friction rollers are installed in front of the rolling mill on the strip-threading side of the second pass of cold rolling to frictionally heat the edge of the strip. . In the present invention, a friction roller is added after the cold rolling uncoiling equipment of the single-stand reversible rolling mill, and it is put into use when the strip is threaded and started in the second pass of cold rolling, and it is stopped when the thickness of the strip steel transitions to the normal control range, and at the same time, it is controlled by the cold rolling process , so that the edge of the strip is heated more evenly, reducing the difficulty of production and reducing the rate of brittle fracture.

The invention provides a timing gear protecting device of a forming machine. The timing gear protecting device comprises a limiting switch and a motor control device. The limiting switch is installedon a backward track of a movable roller of the forming machine and composed of a limiting touch plate and a switch body, wherein the switch body is an electric contact switch, and the original state of a pair of electric contacts is a connection state; the motor control device is connected in a power circuit of the forming machine, and the motor control device is an electric connection device which is formed by a forward compression roller instruction relay in the power circuit of the forming machine, contacts of the forward compression roller instruction relay, a backward compression roller instruction relay in the power circuit of the forming machine, contacts of the backward compression roller instruction relay, a detection limiting relay, contacts of the detection limiting relay, a forward maintenance relay, contacts of the forward maintenance relay, a backward maintenance relay, contacts of the backward maintenance relay, a forward maintenance button, a backward maintenance button, a limiting switch, an alarm light, an forward solenoid valve of the forming machine, a backward solenoid valve and a main motor frequency converter of the forming machine. By means of the timing gear protecting device, the gap expanding situation of compression rollers can be reflected in real time, and the situation is avoided that the gap between a fixed roller and a moving roller is excessively expanded, so that equipment failures are caused.

The invention relates to a method for computing real-time stockline of a blast furnace. The method comprises the following steps: computing the oxygen amount o of a tuyere zone; computing the weight V of required dried cokes for burning in the tuyere zone; computing the falling head C of material batches in the furnace; computing the height P of a material batch newly added into the furnace; and computing the latest stockline X. The invention also relates to a device for computing the real-time stockline of the blast furnace by using the method, and the device comprises a sensor for acquiring different data, a PLC controller, a data analysis server and a display. By adopting the method and the device provided by the invention, the charge level height position in the blast furnace is computed according to carbon balance of blast furnace smelting and combining information including operation air volume of the blast furnace, crude fuel structures and the like, so that the problem of damping down caused by stock rod faults at the top of the furnace during blast furnace production is solved, and a guarantee for long-term stable running of the blast furnace and cost conservation is provided.

The invention relates to the field of manufacturing non-oriented silicon steel, in particular to a production method of a cold-rolled non-oriented silicon steel product for driving motors of new energy vehicles. Its chemical composition is wt%: C≤0.0030, Si: 3.0~3.3, Mn: 0.5~1.0, P: 0.005~0.010, S: 0.0016~0.0025, N≤0.0035, Als: 1.0~1.5, Cu: 0.30~0.50 , Nb: 0.0020 ~ 0.0040, the rest are Fe and unavoidable residual elements. Among them, control [Si]+[Al]+[Mn]: 4.5~5.5, [Cu] / [S]: 120~320. The present invention adopts reasonable chemical composition design and adopts the above-mentioned control process to obtain a non-orientation drive motor with excellent electromagnetic properties, good mechanical properties, simple preparation process, short production cycle, and low production cost. Silicon steel.