22 results about "Liquid iron" patented technology

This invention proposes a device for recovering and utilizing the sensible heat of iron slag, comprising a collection chamber, a slag pot, a tilting machine, a chute, a cold air jet assembly, a first gravity dust collector, and a waste heat boiler. The tilting machine drives the slag pot to tilt sideways, injecting liquid iron slag into the chute. The outlet of the chute extends into the collection chamber, and the outlet of the cold air jet assembly is located below the chute outlet. The air inlet of the first gravity dust collector is connected to the exhaust port at the top of the collection chamber via a pipeline, and the exhaust port of the first gravity dust collector is connected to the air inlet of the waste heat boiler. This invention, through the cooperation of the cold air jet assembly and the chute, rapidly granulates and cools the liquid iron slag and recovers its sensible heat, significantly improving the sensible heat recovery rate of the liquid iron slag. The first gravity dust collector effectively removes dust generated during the iron slag cooling process, protecting the waste heat boiler. The waste heat boiler converts the recovered sensible heat into high-temperature, high-pressure steam, achieving efficient energy utilization and reducing the overall energy consumption of steel production.

The application relates to the technical field of refractory materials, in particular to an aluminum-carbon brick for refining ladle walls and a preparation process thereof, which comprises tabular corundum aggregates, alpha-type alumina micropowder, flaky graphite, oxide composite powder, silicon carbide-based composite powder, lanthanum-hafnium composite oxide nanometer powder, aluminum powder, carbon black and thermosetting phenolic resin. The oxide composite powder accelerates the reduction reaction of ferrous oxide on the surface of the brick body, so that the ferrous oxide is rapidly consumed by carbon in a very shallow layer on the contact surface of the brick, and the penetration of the ferrous oxide into the interior of the brick body is prevented; the silicon carbide-based composite powder fixes the liquid iron obtained by surface reduction in situ, so that the liquid iron cannot freely flow and contact the refining slag again; the lanthanum-hafnium composite oxide nanometer powder strengthens the structural stability, and the obtained brick body can better meet the use requirements of long-term high-strength service of the refining ladle walls.

The application provides a method for smelting ultra-low sulfur steel with low iron water consumption, comprising: converter smelting: adding iron water and scrap steel into a converter for converter smelting to obtain molten steel and ladle top slag; converter tapping: transferring the molten steel and the ladle top slag from the converter, adding lime, alloy, aluminum block and modifier into the transferred molten steel and the ladle top slag to obtain pretreated molten steel and ladle top slag; ladle refining: transferring the pretreated molten steel and the ladle top slag into a refining furnace, adding scrap steel and recovered ladle slag, and performing refining to obtain refined molten steel; RH vacuum treatment: performing vacuum treatment on the refined molten steel to obtain molten steel to be cast; and continuous casting: casting the molten steel to be cast through a slab continuous casting machine to obtain ultra-low sulfur steel. The molten iron does not need to be pretreated, and the ultra-low sulfur steel can be obtained under the condition that the iron water consumption is 680 kg-830 kg per ton of steel, the mass percentage of sulfur is less than or equal to 0.0015%, the production efficiency and quality are improved, and the environmental protection benefit is improved.

The application discloses a kind of hydraulic system oil liquid iron content detection device and detection method, it is related to hydraulic system detection technical field, including protective shell, elastic film, detection circuit and magnetic block;The side of the protective shell is equipped with rectangular through-hole, the elastic film is covered and is arranged in rectangular through-hole, the magnetic block is arranged in the inside of protective shell, and the magnetic block is located the inside of elastic film;The detection circuit includes two conductive wires, connecting conductive sheet, power supply, resistance and indicator light;Two the conductive wires are respectively connected with the positive and negative levels of power supply, and the end of two the conductive wires is respectively located the two sides of elastic film;The iron powder particles can be absorbed on the outer surface of elastic film by the magnetic block, due to the adsorption force of the magnetic block to the iron powder particles, will make elastic film deform to the inside and push displacement connecting conductive sheet, further make detection circuit disconnect, can obtain that the iron powder particles in oil liquid are excessive, otherwise, the iron powder particles in oil liquid are not excessive.

The invention belongs to the technical field of steel and iron manufacturing, and particularly relates to an austenite nodular cast iron molten iron residue filtering device which comprises a supporting frame. An injection pipe is mounted at the top of the support frame; a buffer tank is mounted at the bottom of the injection pipe, and the injection pipe is communicated with the interior of the buffer tank; the inner wall of the injection pipe is fixedly connected with a flow guide plate; the side, fixedly connected with the inner wall of the injection pipe, of the flow guide plate is higher than the side, not fixedly connected with the inner wall of the injection pipe, of the flow guide plate; a flow guide pipe is installed on one side of the buffer tank, the side, close to the buffer tank, of the flow guide pipe is higher than the side, away from the buffer tank, of the flow guide pipe, and through cooperation of a flow guide plate and the buffer tank, molten iron injected from the flow guide pipe can be buffered in time and then is drained into the filter tank through the flow guide pipe; therefore, the molten iron can be in full contact with the ceramic filter screen, impurities in the molten iron can be adsorbed and filtered by the ceramic filter screen, and the quality of a final casting is guaranteed.

The invention relates to the technical field of manufacturing of engine parts, and discloses a centrifugal casting process of an engine cylinder liner, which comprises the following steps: S1, pouring molten iron into a centrifugal mold rotating at a high speed, optimizing the centrifugal rotating speed to assist feeding, and meanwhile, carrying out segmented cooling on the mold to enable the cooling speed of the outer wall of the mold to be 40-80 DEG C / s, the inner wall cooling speed is 30-60 DEG C / s; and S2, during pouring, the included angle between the outlet of the chute and the inner wall of the mold is 35-40 degrees. Appropriate centrifugal pressure is provided through an optimized centrifugal rotating speed formula, feeding is assisted, a sectional cooling strategy of external cooling and internal heat preservation is combined, the solidification sequence is forcibly changed, one-way solidification from outside to inside is formed, the loose defect caused by unsmooth feeding is removed and compressed into an extremely-thin area, inevitably machined in the follow-up process, and therefore the machining efficiency is improved. The loose area is limited from the source and directly removed through machining, and faults caused by risk concentration of the loose defect are avoided.

The application belongs to the technical field of alloy target materials, and discloses a low-oxygen-content iron-chromium-aluminum alloy powder, a target material, and a preparation method of the powder and the target material. The preparation method of the low-oxygen-content iron-chromium-aluminum alloy powder comprises the following steps: step 1: liquid iron, chromium, and aluminum are sequentially subjected to gas-water combined atomization granulation, drying, and screening to obtain iron powder A, chromium powder A, and aluminum powder A; step 2: the iron powder A, the chromium powder A, and the aluminum powder A are sequentially subjected to ball milling and centrifugal separation in an inert gas atmosphere to obtain iron powder B, chromium powder B, and aluminum powder B; and step 3: the iron powder B, the chromium powder B, and the aluminum powder B are mixed in an inert gas atmosphere to obtain the low-oxygen-content iron-chromium-aluminum alloy powder. In the gas-water combined atomization granulation of step 1, the gas used for gas atomization is an inert gas, and the liquid used for water atomization is a mixed liquid of water and a micro-etching agent. The iron powder A, the chromium powder A, and the aluminum powder A are added with isopropyl alcohol or acetone for ball milling in an inert gas atmosphere.

The application provides a dephosphorization spraying device for stainless steel molten iron pretreatment, which comprises a base, a linear module, a gantry, a lifting mechanism, a spraying mechanism, a cooling mechanism and a splash-proof slag scraping mechanism, wherein the lifting mechanism is arranged on the gantry; the spraying mechanism comprises a pipe body, a conveying assembly and a spray head assembly, wherein the pipe body is connected with the lifting mechanism; the conveying assembly is connected with the upper end of the pipe body; the spray head assembly is rotationally connected with the lower end of the pipe body; the cooling mechanism comprises a first cooling assembly and a second cooling assembly, wherein the first cooling assembly is arranged in the pipe body; the second cooling assembly is arranged in the spray head assembly; and the splash-proof slag scraping mechanism is arranged outside the pipe body. The dephosphorization spraying device for stainless steel molten iron pretreatment can automatically rotate the spray head assembly during spraying, can uniformly diffuse the powder and can enhance the stirring effect of the molten iron, so that the reaction is more sufficient and the dephosphorization efficiency is improved.

The utility model relates to the field of plating assistant liquid purification treatment, and discloses a multifunctional plating assistant liquid deironing device which comprises a storage tank and a quantitative feeding mechanism, a controller is fixedly arranged at the front end of the storage tank, a feeding port is fixedly formed in the position, close to the edge, of the upper end of the storage tank, and the quantitative feeding mechanism comprises a fixing box. A partition plate is fixedly arranged at the position, close to the upper end, of the inner side of the fixing box, a second motor is fixedly arranged on one side of the fixing box, the side, close to the second motor, of the outer side of the output end of the second motor is fixedly sleeved with a first material limiting roller, and the side, away from the second motor, of the outer side of the output end of the second motor is fixedly sleeved with a second material limiting roller; and a plurality of material distributing grooves are formed in the outer ends of the first material limiting roller and the second material limiting roller. According to the device, distribution is carried out through the material distribution grooves of the first material limiting roller and the second material limiting roller, after the second motor is started, plating assisting liquid and hydrogen peroxide can be automatically and quantitatively fed, and it is ensured that the dosage added every time is standard and consistent.

This invention provides a hydrogen-rich reduction-high-temperature plasma hydrogen melting ironmaking method, relating to the field of hydrogen metallurgy. The method is a two-stage molten reduction ironmaking method coupling a hydrogen-rich direct reduction shaft furnace and a high-temperature plasma hydrogen melting furnace. Iron-containing raw materials, coke, and flux are added to the top of the hydrogen-based direct reduction shaft furnace, while hydrogen-rich gas is injected into the furnace body for heating. After reduction, metallized iron is obtained, and dry gas and dust are produced at the top. High-temperature plasma hydrogen gas is injected into the tuyeres of the high-temperature plasma hydrogen melting furnace, and coke and semi-coke are added to the top. The metallized iron is finally reduced and melted in the plasma hydrogen melting furnace to obtain qualified molten iron and slag. This invention is simple and easy to operate, with low carbon emissions, low pollutant emissions, and high efficiency. Compared with the traditional direct reduction method, it has higher heat utilization and higher sponge iron metallization rate; the plasma torch heating does not use carbon-containing fuels and has higher heating efficiency.

The application provides a high-temperature liquid ferroalloy continuous granulation forming process and belongs to the technical field of granulation forming of ore smelting furnaces, solves the problem that the traditional large ingot mold casting process seriously restricts the development of the industry, and the application comprises a ladle, a holding furnace, a first-stage water-cooling rolling way, a second-stage rolling forming rolling way, a third-stage self-cooling rolling way, a fourth-stage spiral rolling way, a spraying water-cooling system, a first-stage air-cooling drying system, a second-stage dehydration drying system, a third-stage air-cooling drying system, an intermediate storage bin, a finished product storage bin, a finished product packaging system; the high-temperature liquid ferroalloy is shaped after temperature adjustment in the holding furnace and is preliminarily cooled after length cutting; the high-temperature liquid ferroalloy forms a semi-solid alloy, the semi-solid alloy is sequentially subjected to shape strengthening in the second-stage rolling forming rolling way to form alloy particles; the alloy particles are cooled and dried and finally sent out. The application realizes integrated production from high-temperature metal liquid to solid qualified products and improves the finished product rate of products.

This invention discloses a method, system, and application for secondary energy recovery and utilization in steel plants and hydrogen metallurgy. The method includes: obtaining by-product coal gas from the steel plant, separating reducing gases, and introducing them into a hydrogen-based shaft furnace to produce sponge iron; the reducing gases include a first decarburization gas, a second decarburization gas, a third decarburization and denitrification gas, and hydrogen, or, include the first decarburization gas, the third decarburization and denitrification gas, and hydrogen; the first decarburization gas is obtained by decarburizing FINEX coal gas, the second decarburization gas is obtained by decarburizing converter gas, the third decarburization and denitrification gas is obtained by decarburizing and denitrifying the top coal gas of the hydrogen-based shaft furnace, and the hydrogen is obtained by hydrogen extraction from coke oven gas; the coke oven gas is further hydrogenated to obtain a fourth desorbed gas, which is injected into the blast furnace for low-carbon smelting to produce molten iron. This invention is of great significance for utilizing secondary energy from steel plants, reducing primary energy consumption in hydrogen-based shaft furnaces, and reducing carbon emissions from blast furnaces.

The invention relates to the technical field of blast furnace ironmaking safety production, in particular to a liquid high-temperature slag iron out-of-control control method based on emergency diversion. Comprising the following steps that flow guiding devices are arranged at the connecting position of a blast furnace main runner and an iron runner and the connecting position of a slag runner and a dry slag pit in advance respectively, and the flow guiding devices are kept normally open in the normal iron tapping state, so that liquid slag iron can flow along a normal path. And when the liquid iron slag flows out of control, the flow guide devices at the two positions are triggered to be closed at the same time. And through the closed flow guide device, the liquid slag iron is blocked from flowing to the original path of the flow guide device, and is guided into the dry slag pit. And the flow direction of the liquid slag iron can be quickly, safely and effectively controlled, so that loss caused by out-of-control accidents is fundamentally avoided or reduced.

The application discloses a kind of laterite nickel ore leaching liquid iron-aluminum-chromium-removed slag phase processing system, belong to laterite nickel ore slag phase processing technical field, including filtration module, refinement module, feed module and measurement module, filtration module includes suction assembly and filter component, suction assembly is used to set in the slag phase precipitation zone of multiple iron-aluminum-chromium-removing unit, and its suction port is communicated with slag phase precipitation zone, filter component is connected with the discharge port of suction assembly, filter component has a filter residue outlet and a filtrate outlet connected with multiple iron-aluminum-chromium-removing unit;Refinement module is connected with filter residue outlet;Feed module includes material pipe and material guiding driving part, material pipe has the feed end connected with the discharge port of refinement module;Measurement module is connected with material guiding driving part and circulating leaching ore slurry neutralization unit;The device can filter out the slag phase generated in time and carry out refinement treatment, and the returned filter residue is controlled, and the subsequent acid leaching dissolution efficiency of slag phase can be improved.

The invention discloses a molten iron spheroidizing process and equipment, and relates to the technical field of spheroidizing, and the molten iron spheroidizing process comprises the following steps: S1, filling molten iron into a first accommodating area; adding a magnesium-series spheroidizing agent into the second accommodating area; s2, a first sealing cover is buckled to the opening; s3, the pressure in the cavity is adjusted to be larger than the saturated vapor pressure of magnesium in the magnesium nodulizer in the second containing area; s4, enabling the molten iron to be in contact with a magnesium-series spheroidizing agent; after the cavity is sealed, the molten iron is in contact with the magnesium nodulizer, so that the problem that the cost of spheroidizing treatment is increased due to overflow of magnesium from the cavity after vaporization is reduced; when the pressure in the cavity is adjusted to be greater than the saturated vapor pressure of magnesium in the magnesium-based spheroidizing agent in the second accommodating area, the vaporization probability of the magnesium in the magnesium-based spheroidizing agent is reduced; the molten iron can be fully mixed with magnesium in the magnesium-series spheroidizing agent through the stirring assembly, and the high speed of the spheroidizing reaction of the molten iron and the magnesium-series spheroidizing agent is kept.

The invention relates to the technical field of blast furnace smelting, in particular to a process for improving the desulfurization capacity of high-titanium slag. Comprising the following steps: (1) feeding the high-vanadium ilmenite and a flux into a blast furnace for reaction, and generating liquid molten iron and liquid slag in a hearth; the flux comprises the following chemical components in percentage by mass: 8-12% of MgO, 0.5-1.5% of BaO, less than or equal to 15% of Al2O3, and the effective alkalinity of 1.08-1.18. And (2) carrying out desulfurization reaction on the liquid molten iron and the liquid slag in a hearth to generate low-sulfur molten iron and sulfur-containing slag. According to the process, through multi-dimensional and systematic regulation and control, efficient desulfurization is achieved in the high-ferro-titanium ore proportion smelting environment, and the quality of molten iron is guaranteed.

The present application relates to the technical field of metallurgy, and particularly relates to a method for preparing titanium-iron alloy and aluminum-calcium slag by smelting reduction of titanium-iron slag, and specifically to mixing titanium-iron slag particles with modified CaF2, modified ferrous oxide composite microspheres, modified iron powder and ferrosilicon powder in proportion, carrying out smelting reduction after low-temperature pretreatment, and obtaining Ti-Fe alloy and aluminum-calcium slag respectively after static stratification. Under the synergistic effect of the triple mechanism of modified CaF2, modified iron powder and modified ferrous oxide composite microspheres, the Ti yield is greatly improved compared with the traditional carbon thermal reduction process, and the TiC content in the product is significantly reduced. Under the synergistic effect of multiple mechanisms, the liquid iron droplet sedimentation rate is significantly improved, and the slag-gold separation rate is not less than 90%. The present application realizes the full-value conversion of the solid waste metal phase and slag phase of titanium-iron slag while efficiently recycling Ti to prepare Ti-Fe alloy.

A casting process of a central rotary joint includes the steps of obtaining an upper casting mold, a lower casting mold, and a sand core through 3-dimensional printing, inserting the chill into the sand core, placing the sand core with the chill in the lower mold, inverting the upper mold onto the lower mold to form a assembled mold and define a casting cavity and a vertical pouring channel connected to the casting cavity between the upper and lower molds, injecting liquid iron into the casting cavity through the vertical pouring channel, unmolding after the liquid iron is condensed to obtain the central rotary joint. Through the vertical pouring channel, the chill and related processes, the sequential solidification of the liquid iron is achieved, effectively avoiding deformation and shrinkage porosity caused by the shrinkage of the liquid iron and graphite expansion during the solidification process.

The invention discloses an ironmaking production synergetic arsenic-containing hazardous waste resource utilization method, which utilizes physical heat and composition structure characteristics of alkalescent high-temperature reductive liquid ironmaking slag generated in an ironmaking production process, adopts an innovative process technology to produce arsenic-containing hazardous waste into pellets, and adds the pellets into the high-temperature ironmaking liquid slag. The arsenic-containing hazardous waste is subjected to innocent treatment through the high-temperature ironmaking liquid slag, main harmful components of the arsenic-containing hazardous waste are converted into components of the ironmaking slag, the components are used as raw materials for building material production and road construction, and the technological cost of harmless treatment of the arsenic-containing hazardous waste is reduced.

The invention relates to the technical field of compressors, in particular to a production process of an anti-leakage machine body of a reciprocating piston type compressor unit. The production process comprises the following steps: casting molten iron into a mold in which a main oil pipe is pre-embedded to obtain the anti-leakage machine body of the reciprocating piston type compressor unit; the anti-leakage machine body of the reciprocating piston type compressor unit comprises the following chemical elements in percentage by weight: 2.9-3.5 wt% of C; 1.5 to 2.3 wt% of Si; 1.4 to 2.2 wt% of Mn; less than or equal to 0.06 wt% of P; s < = 0.3 wt%; less than or equal to 0.03 wt% of Sb; and Sn < = 0.1 wt%. The advantages of a production process of anti-leakage machine body casting and main oil pipe pre-burying modeling are reserved, and the defects of the production process in the anti-leakage aspect are overcome; the shrinkage tendency of molten iron is small, the matching degree / fitting degree of the machine body casting process is improved, casting defects can be reduced, the product yield of machine body casting is improved, and the production cycle of a reciprocating piston type compressor unit is shortened.

The invention discloses a brown fused alumina smelting method, and relates to the technical field of refractory material production. The method comprises the following steps: mixing low-grade raw bauxite containing 20-30% of powder with high-temperature asphalt powder; feeding the mixture into a rotary kiln, pre-reducing and calcining at 1000-1100 DEG C, and directly conveying a thermally calcined material at 800 DEG C or above to a batching bin without cooling to be mixed with a reducing agent and scrap iron; feeding the mixed furnace charge into an electric arc area of an electric arc furnace through a dustproof feeding device; the raw materials are put into a self-baking electrode electric arc furnace in 4-5 batches for thin-layer smelting, and the temperature of a main reaction zone is maintained at 2000-2150 DEG C through regional temperature control; and pouring the generated liquid iron alloy and the brown aluminum oxide melt into a receiving ladle together, layering by using density difference, and cooling, crushing and screening to obtain a brown aluminum oxide finished product and a silicon iron alloy byproduct.

This invention provides a hydrogen-based two-stage molten reduction ironmaking method, relating to the technical field of hydrogen metallurgy. The method is a two-stage molten reduction ironmaking process coupling a hydrogen-based direct reduction shaft furnace and a high-temperature plasma hydrogen melting furnace. In the hydrogen-based direct reduction shaft furnace, iron-containing raw materials, coke, and flux are added to the top; hydrogen is injected into the furnace body for heating; and reducing gas is injected from the bottom gas supply device for heating. After reduction, metallic iron is obtained. Simultaneously, the top is treated to obtain dry gas and returned dust. High-temperature plasma hydrogen gas is injected into the tuyeres of the high-temperature plasma hydrogen melting furnace, along with coke and semi-coke added from the top. Returned dust is injected into the dome area of ​​the melting furnace, along with oxygen. The metallic iron produced in the shaft furnace is finally reduced and melted in the plasma hydrogen melting furnace to obtain qualified molten iron and slag. This invention is simple and easy to operate, with low carbon emissions, low pollutant emissions, high efficiency, and a high sponge iron metallization rate.