42results about How to "Good for going straight" patented technology

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.

This invention belongs to the molten slag treatment, especially relates to the blast furnace molten slag treating apparatus. The slag ditch connects with the granulating device and slag flume, the down part of the slag flume connects with the communicating pipe, the distributing trough that connects with the communicating pipe extends into the rotating drum filter, the belt device in the canister connects with the rotating belt device to form a finished articles warehouse; the down part of the rotating filter is arranged with the storage cabinet, laying-up basin, which are connected by the overflow on the pool wall, the dregs cleaning device is arranged on the storage cabinet the laying-up basin connects with the granulating device by the tube connector, valve and dregs cleaning pump. The device fault rate is low, the dregs punching out rate reaches up to more than 99úÑ, which is propitious to the operation and steady production of the blast furnace. And the dreg cleaning water and the sewage is used in closed cycle, so it can save a lot of pure water.

The invention discloses a method for treating iron-bearing dust using a sintering process. The method includes the steps that lime suspension liquid is sprayed in dedusting ash, granulating is carriedout to obtain dedusting ash particles; the dedusting ash particles are added into a sintered mixture, and a sintered mixing material is obtained by mixing and granulating; and the sintered mixing material is distributed, sintered, broken, cooled and screened to prepare a sinter. According to the method for treating the iron-bearing dust using the sintering process, by spraying slaked lime suspension liquid on the surface of the dedusting ash with fine particle size and poor granulability, and the dedusting ash is agglomerated into dedusting ash small particles using viscosity and wettabilityof the slaked lime suspension liquid; the dedusting ash particles are added into the sintered mixture, after mixing and granulating, dedusting ash particles coated with iron ore powder on the externalare formed, separate combustion and mineralization are carried out in the sintering process, and influence of the dedusting ash particles on the composition of a sintered liquid phase is avoided; during the cooling process, the internal cooling speed of the particles is low, the bonding phase strength is improved advantageously, thus the sinter strength and average particle size are improved, low-temperature reduction pulverization of the sinter is obviously inhibited, and the quality of the sinter is obviously improved.

The invention discloses a catalytic combustion improver for blast furnace coal injection and an application method thereof. The catalytic combustion improver is prepared from the following raw materials in percentage by mass through milling and mixing: 1-5% of ferrocene or potassium permanganate, rare metal catalysts including 1-2% of lanthanum oxide and cerium oxide, 30-35% of calcium peroxide, 15-20% of magnesium peroxide, 15-20% of active manganese dioxide and 1-3% of copper sulfate, and a carrier including 15-20% of calcium carbonate or dolomite, wherein the particle size of the product is 0.076 mm, and the content is greater than or equal to 95%. The catalytic combustion improver for blast furnace coal injection, disclosed by the invention, is used in a pulverized coal mass rate of 0.4-0.45%, the particle size of pulverized coal is required to be 0.076 mm, and the content of pulverized coal is required to be greater than or equal to 50%. According to the invention, through prompting the early release of coal chemical energy, the combustion efficiency of pulverized coal is increased, and the purposes of saving energy and reducing consumption are achieved. After a catalytic combustion improver product disclosed by the invention is added into pulverized coal, through a chemical reaction, C-C bonds in the pulverized coal are forcedly fractured, therefore, the ignition temperature of the pulverized coal is reduced, and the pulverized coal is completely combusted in a short time.

The invention discloses an adaptive heating system for temperature distribution during the warm rolling of magnesium alloy strips. The system includes a pedestal, a heating assembly, a middle displacement adjustment mechanism, edge displacement adjustment mechanisms and a controller; the heating assembly is arranged on the pedestal in a supported manner, and are arranged in the width direction ofa magnesium alloy strip; the heating assembly at least includes a middle heater and edge heaters arranged on the two sides of the middle heater; the middle heater is provided with middle temperature measurement instruments and a middle displacement sensor; the edge heaters are provided with edge temperature measurement instruments and edge displacement sensors; the middle displacement adjustment mechanism adjusts the spacing between the middle heater and the middle part of the magnesium alloy strip; the edge displacement adjustment mechanisms adjust the spacing between the edge heaters and theedge parts of the magnesium alloy strip; and the controller is connected to the middle heater, the edge heaters, the middle temperature measurement instruments, the middle displacement sensor, the edge temperature measurement instruments, the edge displacement sensors, the middle displacement adjustment mechanism and the edge displacement adjustment mechanisms.

The invention discloses a method for determining saturated moisture of coke, comprising crushing treatment on the coke and drying treatment on the coke. The method comprises the following steps of: crushing appropriate amount of coke sample acquired from a production field, and screening the crushed coke according to different fractions within the particle size range of 5-30mm; placing the coke at different fractions into a drying box, and carrying out full forced air drying at the temperature of 95-115 DEG C; mixing the dried coke according to weight percentage of different fractions, and immersing the mixed coke into water to be fully soaked; and weighing the soaked coke on a balance, and calculating content of the saturated moisture of the coke when reading of the balance is stable. The invention provides a method for determining the saturated moisture of the coke for the coke with high moisture content in production, thus being beneficial to finding that whether excessive moisture is contained in the coke to judge whether excessive water is sprinkled into the coke, being beneficial to coke quality monitoring and improving use quality of the coke and being beneficial to reducing usage of the coke and production cost in a smelting reduction process.

The invention relates to a mineral processing technology for processing mixed iron ore difficult to separate and with various iron minerals. The mineral processing technology is characterized in thatraw ore with iron grade being of 21-23% and particle size being of 250mm-0mm is fed in a self-grinding machine to obtain a self-grinding product with the particle size being of 30mm-0mm, the self-grinding product is fed in a double-layer linear vibrating screen to obtain three kinds of screened products with the particle sizes separately being of +10mm, 10mm-1mm and 1mm-0mm, and the three kinds ofscreened products are subjected to different grading processing of grind grading, dry magnetic separation, wet magnetic separation and reverse flotation operation to obtain ore with concentrate gradebeing more than 64.5%. The mineral processing technology has the advantages that (1), through introduction of a high-pressure grinding roller closed circuit crushing autogenous mill stone, capacity of the autogenous mill is released; (2), a novel rotary kiln structure with chemical reaction and reduction reaction being conducted step by step is adopted, and the percent conversion of the magneticore is improved; and (3), compared with an original technology, the concentrate grade is improved by nearly 5 percentage points.

The invention relates to a concentrate grade adjusting device of a drum magnetic separator, which comprises an ore feeding box of the drum magnetic separator, a separation groove, a permanent magnet separation drum, a concentrate box, a concentrate box ore discharge pipe, a tailing box, a tailing box ore discharge pipe and a control box, and is characterized in that a tailing conveying mechanism consisting of an ore separation pipe and an electric knife gate valve is arranged between the tailing box and the concentrate box, and a concentrate grade detection mechanism consisting of a sampler and an automatic grade instrument is arranged on the concentrate box ore discharge pipe; and the electric knife gate valve and the automatic grade instrument are electrically connected with the controlbox. The device has the advantages that the amount of the tailings fed into the concentrate box is controlled by controlling the opening degree of a valve of an ore distribution pipe of the tailing box, the grade of the concentrate is adjustable, the yield of the concentrate and the recovery rate of iron are increased, economic benefits are improved, the fluidity of slag during ironmaking is improved, and smooth operation of a blast furnace is facilitated.

The invention discloses a self-adaptive temperature-control continuous rolling method for a magnesium alloy. The self-adaptive temperature-control continuous rolling method comprises the following steps of: (1) measuring an initial temperature and an initial thickness of a magnesium alloy plate strip, and obtaining and outputting a preset scheme according to the measured initial thickness and themeasured initial temperature, wherein the scheme at least comprises a preheating scheme and a rolling scheme of each rolling pass, and the rolling scheme at least comprises rolling passes and pre-pressing amount of each rolling pass; (2) rolling; and (3) completing rolling. The self-adaptive temperature-control continuous rolling method for the magnesium alloy disclosed by the invention measures the initial temperature and the initial thickness of the magnesium alloy plate strip; and a plate strip thickness measuring system is combined with a temperature measuring system, so that preset and real-time self-adaptive regulation is performed on the magnesium alloy plate strip rolling process by setting the preset scheme, and therefore, online temperature-control controlled rolling of the magnesium alloy plate strip is achieved. The method is beneficial for improving smooth performing of the rolling process and stabilizing product quality, and has the advantages of being less in manual intervention and realizing automatic production easily.

The invention discloses a preparation method of a vanadium-titanium magnetite hot-pressed block. The method comprises the steps of (a) crushing and screening vanadium-titanium magnetite, coal powder and a solvent; (b) after crushing and screening, respectively calculating and preparing 60-80wt% of vanadium-titanium magnetite powder, 20-40wt% of the coal powder and 0-10wt% of the solvent, and fully and uniformly mixing prepared raw materials to obtain a first material; (c) heating the first material to 100-300 DEG C, and pressing the first material to obtain an ellipsoidal granular second material of which the size is (20-40)mm*(15-30)mm* (10-20)mm by using a hot-press device; (d) putting the second material into a neutral or reducing atmosphere tunnel kiln or coal-based shaft furnace, and performing carbonization heat treatment, wherein the carbonization heat treatment temperature is 800-1100 DEG C, and the carbonization heat treatment time is 5-7 hours. The preparation method of the vanadium-titanium magnetite hot-pressed block, disclosed by the invention, has the characteristics of strong raw material adaptability, high production efficiency, low energy consumption, low cost and the like, is helpful for improvement of the smelting level of the vanadium-titanium magnetite of China, and has good market application prospects.

The invention discloses a blast furnace ironmaking technology and method utilizing waste heat steam, and relates to the technical field of iron and steel smelting. The blast furnace ironmaking technology and method utilizing the waste heat steam comprise a steam pipe network, an oxygen pipe network and an air blower; the steam pipe network and the oxygen pipe network communicate with a smoke heatexchanger through an automatic valve and an electronic flow meter in sequence; the air blower communicates with a hot blast stove through an automatic valve and an electronic flow meter; the smoke heat exchanger communicates with the hot blast stove; and the hot blast stove communicates with a blast furnace. According to the blast furnace ironmaking technology and method utilizing the waste heat steam, the utilization coefficient of the blast furnace is increased, and the production cost is reduced. Due to the kinetic and thermodynamic characteristics of H2 and CO reduced Fe2O3-Fe3O4-FeO-Fe, the width of an indirect reduction zone is increased, the reduction speed is increased, a high-temperature zone moves downwards, low-temperature reduction pulverization is reduced, the breathability ofraw materials is improved, the blast furnace smelting time is shortened, smooth operation of the blast furnace is facilitated, and the utilization coefficient of the blast furnace is increased.

The invention discloses a size grading control method for coke at a blast-furnace tuyere and mainly solves technical a problem in precise control of size of coke at the blast-furnace tuyere during quality control of coke at the blast-furnace tuyere in the prior art. The technical scheme provided by the invention includes steps of removing iron particles in coke at the blast-furnace tuyere by using magnets; grading the coke at the blast-furnace tuyere with a mechanical sieve and measuring the percentage of the coke of different size grades in the total mass of the coke; crushing coke of different grades at the blast-furnace tuyere and detecting the mass ratio of iron slag in the coke of different grades at the blast-furnace tuyere through coke microscopic structure detection after sampling; and calculating the proportions of the coke of different grades at the blast-furnace tuyere in the total mass of the coke. According to the invention, correct evaluation of the degradation condition of the coke in the blast-furnace is realized and a guarantee is provided for smooth production operation control of the blast-furnace.

The invention discloses a treatment method of high-temperature high-silicon molten iron, and relates to a ferrous metallurgy technology. The treatment method of the high-temperature high-silicon molten iron is characterized in that iron-containing oxide is added before a ladle or a torpedo ladle receives the high-temperature high-silicon molten iron, and the iron-containing oxide comprises sintered ore, pellet ore and oxide scale, so that the temperature of the molten iron is reduced, and the purpose of reducing the heat dissipation capacity of the molten iron in the conveying process is achieved; when the ladle or the torpedo ladle receives the molten iron, 100-500 kg of lime is added in order to restrain foam slag from overflowing, the particle size range of the lime is 10-20 cm, and therefore splashing caused by rapid rising of the temperature of a molten pool in the early stage of converter blowing is avoided. By reasonably reducing the temperature of the high-temperature high-silicon molten iron, blowing in the earlier stage of the converter blowing is stable, smooth operation of the converter working procedure is facilitated, and the problems that the high-temperature high-silicon molten iron is large in heat loss, and the converter blowing is difficult to stably carry out are solved.

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 relates to the technical field of ironmaking, in particular to a method for producing direct reduced iron by using lignin as a reducing agent. The invention provides a method for preparing direct reduced iron with energy saving and environmental protection, simple process and high production efficiency, and the method meets the requirements of low energy consumption, low cost and environmental protection in iron and steel production.

The invention discloses a method for eliminating a horizontal-vibration linear offset of the tail of short-process thin strip steel. The control method can eliminate the horizontal-vibration linear offset of the tail of short-process thin strip steel by control over centering of guide plates of rolling mills through measurement of rolling central lines, control over tail sleeving of loops, controlover the rolling force and roll bending force, control over the time sequence of a water system, control over the rolling tonnage of working roller, and control over the temperature of plate blanks.By adoption of the control method, the problem of the horizontal-vibration linear offset of the tail of ultra-thin CPS materials is solved; the technical problem that the plate shape of the tail of ultra-thin strip steel rolled through a short process is difficult to control, and consequentially, tail whipping and instable production are caused is solved; and high-quality and high-stability large-scale production of the ultra-thin strip steel rolled through the short process is realized.

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 discloses a method for inhibiting bonding of pellets in a COREX shaft furnace and belongs to the technical field of melt reduction ironmaking. The method comprises (1) roasting green pellets to obtain finished products of oxidized pellets, (2) placing the roasted oxidized pellets into a disc pelletizer, spraying water to wet the pellets, carrying out rotation of the pelletizer along with addition of solid inhibitor powder and spraying of a certain amount of water so that the pellets are uniformly coated with solid inhibitor layers and coated pellets are prepared, and (3) drying the coated pellets, adding the coated pellets into a load reduction furnace and carrying out reduction at a reduction gas temperature of 800-950 DEG C. The method can effectively improve the problem of the agglomeration of the pellets in the COREX shaft furnace process, is beneficial to smooth production of the pre-reduction furnace, improves utilization efficiency of the COREX shaft furnace, and reduces a direct reduction iron production cost. The reduced pellets have a bonding index less than 25%.

The invention discloses a magnesium alloy continuous extrusion and temperature controlled continuous rolling production method. The method includes the following steps: (1) extruding magnesium alloy billet into magnesium alloy plates and strips; (2) measuring initial temperature and initial thickness of the magnesium alloy plates and strips, and obtaining and inputting a preset scheme according tothe measured initial temperature and initial thickness, wherein the scheme at least includes a preheating scheme and a rolling scheme for rolling passes and the rolling scheme at least includes the rolling passes and pre-press quantity of the rolling passes; (3) rolling; and (4) completing the rolling. The magnesium alloy continuous extrusion and temperature controlled continuous rolling production method adopts a rolling method of combining the continuous extrusion and on-line temperature controlled rolling, realizes the efficient continuous operation of the continuous extrusion and temperature controlled rolling process of the magnesium alloy billet through adaptive control of the extrusion and rolling process of the magnesium alloy billet, and matches real-time state of the plates andstrips, which is beneficial to improve the smoothness of the rolling process and the stability of the product quality.