21 results about "Electrolytic iron" patented technology

The invention relates to a process for preparing pure iron by using red mud, which is characterized in that the red mud is Bayer process red mud, i.e., solid waste residue formed by solid-liquid separation after aluminum oxide is dissolved out from bauxite through high temperature, high pressure and strong alkali in the process of producing aluminum oxide by adopting a Bayer process, so that the environmental burden caused by the Bayer process red mud can be solved; the method is beneficial for reducing carbon emission in the aspect of iron element extraction and promoting development of a green metallurgical technology, and is characterized by comprising the following steps: taking Bayer process red mud as a raw material, carrying out acid leaching on the Bayer process red mud to obtain a ferrous oxalate extract, calcining the ferrous oxalate to obtain iron oxide, and recycling the iron oxide. And dissolving the ferric oxide into a sulfuric acid solution to obtain a ferric sulfate solution, taking the ferric sulfate solution as an electrolyte in an electrolysis device, and obtaining electrolytic iron through the electrolysis device, so that the pure iron is prepared from the red mud.

A preparation method of the steel slag-based binder comprises the following steps: crushing converter steel slag, grinding to 150 meshes or below to obtain converter steel slag fine powder, removing iron, continuously grinding to 300-350 meshes, and removing iron again until the metal iron content is less than or equal to 0.5 wt% to obtain active steel slag powder; fly ash and water are mixed and then settled, bottom sediment is taken and dried till the water content is smaller than or equal to 3 wt%, and pretreated fly ash is obtained; and mixing the active steel slag powder, the pretreated fly ash, pyrophyllite and wollastonite according to a certain ratio, and uniformly grinding to obtain the steel slag-based binder for preparing the micro-electrolysis iron-carbon spheres. The method not only solves the problem of recycling of steel slag resources, but also can prepare the iron-carbon micro-electrolysis filler with low production cost, so that the cost is remarkably reduced.

The invention belongs to the technical field of waste resource treatment and recovery, and provides a hematite type waste residue treatment method which comprises the steps that hematite type waste residues are sequentially pulpified and washed, and washed residues are obtained; the washing slag is leached, and a leaching solution is obtained; mixing the leachate with iron powder and sulfur, and carrying out reduction reaction to obtain reduced liquid and reducing slag; mixing the reduced liquid with a precipitant, and carrying out an aluminum precipitation reaction to obtain a purified liquid and aluminum slag; and the purified liquid is electrolyzed, and the electrolytic iron powder is obtained. According to the method, the waste residues are subjected to acid dissolution through the hydrometallurgy technology and then are prepared into the electrolytic iron powder through the electrolysis technology, iron and impurities such as aluminum and silicon can be fully separated, a high-value iron powder product is obtained, meanwhile, the impurities can be further fully utilized, and by-products of nickel and aluminum are obtained.

The invention relates to the technical field of pure iron preparation through aqueous solution electrolysis, in particular to a method for inhibiting colloid generation in pure iron preparation through FeSO4 solution electrolysis. In the electrolytic bath, a cathode chamber and an anode chamber are separated by using an anion exchange membrane; the anolyte is a Na2SO4 or K2SO4 solution, the catholyte comprises a FeSO4 solution and a reducing agent, and the concentration of SO4 < 2-> in the catholyte is the same as that of SO4 < 2-> in the anolyte. According to the method, the surface roughening phenomenon of a cathode deposition layer is effectively inhibited, the risk of hydrogen embrittlement of pure iron caused by excessive precipitation of hydrogen is avoided, the attenuation rate of current efficiency is remarkably reduced, and therefore synchronous improvement of electrolytic iron product quality, electrolytic efficiency and process stability is achieved; the method has important significance for promoting the development of a pure iron preparation technology by an aqueous solution electrolysis method.

The invention belongs to the technical field of iron-silicon-aluminum magnetic materials, and provides a method for preparing an iron-silicon-aluminum magnetic powder core by using silicon steel waste, which comprises the following steps: powder preparation, proportioning, coating, granulation, pressing and annealing. According to the method, the silicon steel waste serves as the raw material, the silicon steel waste, the silicon iron, the aluminum ingot, the ferrophosphorus and the electrolytic iron are placed in the vacuum induction furnace to be smelted and then prepared into powder, the prepared iron-silicon-aluminum powder is coated, granulated, pressed and annealed to obtain the iron-silicon-aluminum magnetic powder core, high-value utilization of the silicon steel waste is achieved, the raw material cost is remarkably reduced, and environmental protection and energy saving are achieved.

The invention belongs to the technical field of metal purification and preparation, and particularly relates to a method for preparing high-purity iron through magnetized electrolyte assisted electrolysis. The method comprises the following steps: 1) obtaining a hydrated ferrous salt solution as an electrolyte; 2) removing impurities from the electrolyte obtained in the step 1); (3) magnetizing the electrolyte subjected to impurity removal; and (4) the magnetized electrolyte obtained in the step (3) is placed in an electrolysis device to be electrolyzed, pure iron with the purity larger than or equal to 99.9% is obtained on a cathode, and in the electrolysis device, the anode material is pure iron with the purity larger than or equal to 99%. According to the invention, the electrolyte is magnetized in a uniform magnetic field, and the magnetized electrolyte is electrolyzed. In the electrolysis process, the deposition rate of the electrolytic iron on the cathode plate is increased, the energy consumption in the electrolysis process is reduced, and meanwhile, the integrity of the electrolytic iron on the cathode plate is also improved.

The invention discloses a wear-resistant steel-based mold material for plastic magnetic injection molding and a preparation method of the wear-resistant steel-based mold material, and relates to the technical field of mold steel materials. When the steel-based mold material is prepared, metal chromium, titanium powder, ferromolybdenum, graphite, ferroboron, lanthanum iron and electrolytic iron are weighed according to a specific proportion, and a cast ingot is obtained through vacuum induction melting and argon protection pouring; a calcium fluoride-aluminum oxide-calcium oxide mixed slag system serves as a remelting medium, electroslag remelting, homogenization treatment and oil quenching are conducted on the cast ingot, and a steel ingot is obtained; the steel ingot is subjected to multidirectional forging and temperature-controlled cooling, and forged die steel is obtained; and finally, the forging die steel is subjected to gas nitriding subzero treatment and multi-stage tempering, gradient titanium nitride and chromium nitride metal ceramic layers are induced to be formed on the surface, and the wear-resistant steel-based die material for plastic magnetic injection molding is prepared. The prepared steel-based mold material has high hardness, high wear resistance and corrosion resistance.

The invention provides a method for preparing electrolytic iron powder from laterite-nickel ore hydrometallurgy tailings. The method comprises the following steps: carrying out deep acid leaching treatment on the laterite-nickel ore hydrometallurgy tailings, and carrying out solid-liquid separation to obtain leachate and acid leaching residues; mixing the leachate with a reducing agent to carry out reduction reaction, adjusting the pH value of the leachate to carry out aluminum and chromium removal reaction, and adding sodium sulfide into a solution obtained by the aluminum and chromium removal reaction to carry out nickel removal reaction, so as to obtain impurity-removed liquid; and electrodeposition treatment is conducted on the liquid obtained after impurity removal, a cathode is stripped after electrodeposition treatment, the cathode is crushed and then subjected to annealing reduction treatment, and the electrolytic iron powder is obtained. According to the method, through the acid leaching-impurity removal-electrodeposition-annealing reduction process, the difficulty of sulfur in the iron ore concentrate process and the interference of chromium in smelting reduction are avoided, the high-purity electrolytic iron powder can be obtained under the condition of low energy consumption, and high-value recycling of iron resources in the laterite-nickel ore hydrometallurgy process is achieved.

The invention belongs to the field of energy and metallurgy. Specifically, the invention discloses an electrolytic iron system based on multi-energy coupling and a surface topography multi-scale control method. A nano-micro-scale special surface microstructure is constructed on the cathode seed plate through a combined process of laser engraving, sand blasting treatment, anodic dissolution and photovoltaic current pre-coating. And meanwhile, magnetic field ultrasonic microwave multi-physical field enhanced ore phase reconstruction, acidolysis, anodic dissolution, photovoltaic current pre-coating, iron electrolysis and other procedures are adopted, and the reaction performance is improved. In the multi-scale control process of the surface appearance of the electrolytic iron, a multi-energy coupled clean energy supply system is adopted. According to the method, the non-uniform deposition problems such as cracking, blackening and dendritic crystals in the iron electrolysis process can be remarkably inhibited, and the current efficiency and the production stability are improved. The method is suitable for surface morphology regulation and control of pure iron prepared through large-scale continuous iron ore electrolysis, and has the advantages of being high in efficiency, low in energy consumption, free of pollution, ultralow in carbon dioxide emission and the like.

The invention belongs to the technical field of electrolytic metallurgy, and particularly relates to a method and device for manufacturing iron through magnetic field assisted low-temperature electrolysis, and the method comprises the following steps: taking a suspension of iron oxide-containing mineral powder and a strong alkaline solution as an electrolyte, inserting an anode and a cathode into the electrolyte to construct an electrolysis system, then respectively connecting the anode to a power supply anode, and connecting the cathode to a power supply cathode; connecting the cathode to the negative electrode of the power supply; applying a magnetic field to the electrolysis system and electrifying for electrolysis; and after electrolysis is completed, the cathode is taken out, washed and dried, and then a pure iron product generated on the surface of the cathode is stripped. Compared with the prior art, the method solves the problems of complex steps, low current efficiency and difficulty in product separation due to the fact that a specially prepared iron oxide cathode is needed in low-temperature alkaline electrolysis iron preparation in the prior art. According to the scheme, the suspension of the iron-containing oxide mineral powder and the strong alkaline solution serves as the electrolyte, the current efficiency of electrolytic iron manufacturing is obviously improved by applying the magnetic field, and zero-carbon-emission and efficient short-process preparation of pure iron is achieved.

To provide a method for producing electrolytic iron foil having high purity and excellent in smoothness and flexibility.SOLUTION: The method for producing an electrolytic iron foil includes a step of forming an electrolytic iron foil F on the surface of a cathode drum 1 by using the cathode drum 1 rotating in a state of being at least partially immersed in an electrolytic solution 3 and an anode 2 arranged so as to face the cathode drum 1 in the electrolytic solution 3 and passing an electric current through the cathode drum 1 and the anode 2. The temperature of the electrolytic solution 3 is 50 to 90 °C, the content of Fe2 + in the electrolytic solution 3 is 40 to 200g / L, the pH of the electrolytic solution 3 is 2.0 to 4.0, and the density of the current is 50 to 500A / m2.SELECTED DRAWING: Figure 1

The invention discloses a method and a system for co-producing high-purity iron through a Bayer process and high-purity iron powder, and belongs to the field of metallurgical recycling and green chemical engineering. According to the method, residual alkali liquor and process waste heat in the Bayer process red mud are utilized, the ultrasonic cavitation effect is cooperated with sodium thiosulfate to serve as a Fe < 3 + > stabilizer, iron oxide in the red mud is selectively dissolved at the temperature of 80-100 DEG C, and meanwhile dissolution of Al2O3 is inhibited. And filtering the dissolved iron alkali liquor through a ceramic membrane, complexing and purifying the iron alkali liquor through EDTA (Ethylene Diamine Tetraacetic Acid), introducing the iron alkali liquor into a diaphragm electrolytic cell, directly electrolyzing to generate Fe (OH) 2 under the conditions that the pH is 10-11 and the current density is 3000-5000 A / m, and dehydrating and reducing to obtain iron powder with the purity of more than or equal to 99.5%. And the electrolytic residual liquid is returned to a reaction process after alkali is supplemented, and filter residues are recycled to a Bayer process dissolution section, so that full circulation of resources is realized. According to the method, the technical bottlenecks of high acid consumption and alkaline electrolytic iron of a traditional acid leaching method are broken through, and the energy consumption per ton of iron is only 2100 kWh and is reduced by 38% compared with that of a traditional process.

This invention relates to a method for extracting iron from red mud using microwave biomass reduction-sulfuric acid leaching-electrolytic deposition, belonging to the field of resource comprehensive utilization and hydrometallurgical technology. The method first involves uniformly mixing red mud with a biomass reducing agent, then using a microwave field for rapid and efficient reduction, converting the sparingly soluble iron oxides in the red mud into readily soluble elemental iron or low-valence iron oxides. The reduction product is then leached with sulfuric acid, allowing the iron to enter the solution and separate from most impurities. Finally, the iron-rich leachate is electrolytically deposited to directly obtain high-purity electrolytic iron. This invention utilizes the selectivity and holistic nature of microwave heating, coupled with the green and renewable characteristics of the biomass reducing agent, to achieve efficient, energy-saving, and environmentally friendly recovery of iron from red mud. The process is short, energy-efficient, and has significant industrial application prospects.

This invention discloses a method for preparing high-frequency, low-loss Fe-Ni-Mo permalloy powder using an atomization and heat treatment process, relating to the field of soft magnetic functional materials technology. The invention includes the following steps: first, electrolytic iron, electrolytic nickel, molybdenum plate, ferroboron, silicon, and sponge yttrium are smelted to obtain an alloy liquid; then, the alloy liquid is atomized and solidified to form powder; the resulting atomized powder is cleaned and treated in an argon atmosphere at 600-620℃ for 30-40 minutes; subsequently, it is coated with Y-Al-F-O sol, followed by silica coating; finally, it is treated in an argon atmosphere at 380℃ for 30-40 minutes, and after sieving, high-frequency, low-loss Fe-Ni-Mo permalloy powder is obtained. This preparation method effectively improves the insulation resistance, high-frequency low-loss capability, and frequency stability of the permeability of the Fe-Ni-Mo permalloy powder.

The present invention discloses a polyolefin composite material, its preparation method, and application, belonging to the field of polymer materials technology. The polyolefin composite material comprises the following components in parts by weight: 18-32 parts of polyolefin resin, 19-31 parts of vinyl coupling agent-modified metal powder, 19-31 parts of nitrogen-phosphorus flame retardant, 4.5-11 parts of graphite, and 0.9-5.2 parts of an interface modifier. The vinyl coupling agent-modified metal powder comprises a vinyl coupling agent and a metal powder, wherein the metal powder comprises at least one of carbonyl iron powder, reduced iron powder, electrolytic iron powder, and iron-based alloy powder. The polyolefin resin, vinyl coupling agent-modified metal powder, nitrogen-phosphorus flame retardant, graphite, and interface modifier work together to produce a composite material having excellent electromagnetic shielding and flame retardant properties. The polyolefin material is suitable for the preparation of electronic components, particularly electrical control boxes, lithium battery packs, and protective housings for electronic appliances.

The invention provides a microwave preheating mineral powder-molten salt electrolysis ironmaking co-production system and a co-production method, and relates to the technical field of green low-carbon ironmaking systems and methods. The system comprises a feeding unit, a microwave preheating device, a molten salt electrolytic bath, a product treatment device and a gas circulation unit which are sequentially connected through a pipeline. The microwave preheating device is provided with a reducing gas inlet, preheated mineral powder is directly fed into a molten salt electrolytic bath, direct current is introduced into a molten salt medium for electrolysis, metal iron liquid is obtained at a cathode, and a gas product is separated out at an anode; and anode gas generated by electrolysis and tail gas generated by preheating are purified and separated by the gas circulating unit and then are recycled. According to the method, the high efficiency of microwave preheating and the greenness of molten salt electrolysis are combined, so that the energy consumption is obviously reduced, the method is green and low-carbon, the process is short, the production efficiency is high, the raw material adaptability is wide, high-value products are co-produced, and industrial large-scale production, popularization and application are facilitated.

This invention belongs to the technical field of iron-silicon-aluminum magnetic materials and provides a method for preparing iron-silicon-aluminum magnetic powder cores using silicon steel waste. The method includes the following steps: powder preparation, proportioning, coating, granulation, pressing, and annealing. This invention uses silicon steel waste as raw material, which is smelted with ferrosilicon, aluminum ingots, ferrophosphorus, and electrolytic iron in a vacuum induction furnace and then powdered. The resulting iron-silicon-aluminum powder is then coated, granulated, pressed, and annealed to obtain the iron-silicon-aluminum magnetic powder core. This method achieves high-value utilization of silicon steel waste, significantly reduces raw material costs, and is environmentally friendly and energy-saving.

The invention relates to the technical field of electrolytic metallurgy, in particular to a method for preparing pure iron through acid solution electrolysis. Comprising the following steps: separating a cathode chamber from an anode chamber by using a diaphragm in an electrolytic cell; the electrolyte of the anode chamber is a Na2SO4 or K2SO4 solution; the electrolyte in the cathode chamber is a mixed solution of FeSO4 and Na2SO4 or K2SO4, wherein the amount of substance of Na2SO4 or K2SO4 is 30%-50% of the amount of substance of FeSO4; and the pH of the electrolyte in the cathode chamber and the pH of the electrolyte in the anode chamber are the same and are both 2.5-4. According to the method, a proper amount of Na2SO4 or K2SO4 is added into the electrolyte in the cathode chamber, the conductivity of the electrolyte is maintained, the electrolytic efficiency is improved, meanwhile, the nanoscale iron powder is adopted for adjusting the pH of the electrolyte in the cathode chamber, Fe (OH) 3 colloid is prevented from being generated, the surface flatness of electrolytic iron is guaranteed, and therefore the quality, efficiency and purity of pure iron preparation are effectively improved.

The invention discloses a light-storage-iron-based material circulation co-production system, and the system comprises an iron flow battery which is used for charging through photovoltaic power distributed by an intelligent micro-grid system, reducing Fe < 2 + > in a negative electrode electrolyte into metal iron, and depositing the metal iron; the molten electrolytic iron device comprises an electrolytic bath; the ternary composite anode has a gradient porous structure; the molten electrolytic iron device is used for carrying out electrolytic purification on iron deposited on the negative electrode of the iron liquid flow battery to obtain an iron ingot; the lithium iron phosphate synthesis system is used for enabling the iron ingot produced by the molten electrolytic iron device to react with Li2CO3 and ammonium dihydrogen phosphate NH4H2PO4 to obtain LiFePO4; the monitoring system is used for monitoring the electrolyte concentration and the electrode temperature in the molten electrolytic iron device; and the EMS system is configured to execute an energy distribution algorithm to regulate and control the real-time input power of the molten electrolytic iron device based on the electrolyte concentration and the temperature of the electrode. According to the method, CO2 emission per ton of iron does not exceed 0.38 ton, and the performance of the electrolyte is reduced by 1t after 50 times of circulation; 2%, the payback period is lt; 5 years.

The present invention discloses a 1kg-level high-temperature electrolytic ironmaking experimental device and experimental method, which relate to the technical field of molten oxide electrolytic ironmaking, and are intended to solve the problem that the existing high-temperature electrolytic ironmaking lacks experimental equipment for production; the upper and lower ends of the heating furnace of the experimental device of the present invention are respectively provided with a top lifting device and a bottom lifting device, and the top lifting device is inserted with a cathode, a stirring paddle and an anode, and the cathode and the anode are electrically connected to an electrochemical analyzer; a bottom opening is provided at the lower part of the heating furnace, and a bottom refractory platform is provided at the upper end of the bottom lifting device, an electrolysis container is provided at the upper end, and a furnace bottom block is fixed at the lower end, and a plurality of holes are provided on the bottom refractory platform and the furnace bottom block to connect the inside and outside of the heating furnace, which are used to introduce protective gas into the heating furnace, and an exhaust pipe is also provided on the upper part of the heating furnace for exhausting gas; the present invention can study the influence of different factors on the behavior of high-temperature electrolytic iron, explore the process parameters of high-temperature electrolytic ironmaking, and provide a new way for green and low-carbon ironmaking.