48 results about "Fayalite" patented technology

The invention relates to a method for extracting iron from copper smelting waste residue. The method comprises the following steps: pulverizing copper slag, a reductant which is a mixture comprising one or more of anthracite, graphite, petroleum coke and coke, calcium oxide or calcium carbonate into a certain granularity, fully mixing the materials, carrying out mineralogical reconstruction and carbothermal reduction under high temperature to convert fayalite in the residue into iron oxide and then reduce the iron oxide into iron, and recovering the iron by magnetic separation, wherein, nonmagnetic products can be taken as raw materials for burning cement.

The invention relates to a method for eliminating magnetic iron oxide furnace accretion produced in a copper sulfide concentrate pyrometallurgical process. The method is characterized in that a proper amount of scrap copper and quartz are put in a weld pool in the metallurgical process on the basis of a traditional technology, elementary substance copper in the scrap copper replaces FeS in fusant to generate Fe elementary substance, Fe reacts with magnetic iron oxide (main component of furnace accretion) in the weld pool to obtain FeO, the added quartz and the FeO generate fayalite slag and thereby the magnetic iron oxide can be eliminated. The technology can be implemented during smelting, converting, continual copper smelting or the clarification separation process of a slag and sulfide mixed fusant electric furnace. The invention has the advantages that the copper matte grade can be improved, the copper contained in slag is reduced, the furnace condition is improved and the superiority of the separation of copper and impurities in the scrap copper is realized.

The invention provides a comprehensive treatment method for red mud and copper slag. The method comprises the steps that 1, the red mud and the copper slag are mixed to obtain a mixed raw material of the red mud and the copper slag, then a reducing agent is added into the mixed raw material to be evenly mixed, and a mixture is obtained; 2, roasting is conducted; and 3, the mixture is crushed and milled after being cooled, magnetic separation is conducted, and finally metal iron power and tailings are obtained. Through the method, the problems that when the copper slag and the red mud are pelletized independently, pelletizing is difficult, iron particles can not be gathered due to fineness of the iron particles in the independent reduction process of the red mud and fayalite is difficult to restore in the independent reduction process of the copper slag are solved.

The invention discloses a method and system for treating metallurgical slag. The method comprises the steps that the metallurgical slag, limestone and adhesives are subjected to forming treatment, so that first material pellets are obtained; oxidizing roasting is conducted on the first material pellets, so that fayalite in the metallurgical slag is converted into ferric oxide, and meanwhile oxidizing roasting products are obtained through desulfurization; the oxidizing roasting products are crushed, so that crushed oxidizing roasting products are obtained; the crushed oxidizing roasting products, reducing coal, the adhesives and water are subjected to forming treatment, so that second material pellets are obtained; reducing roasting is conducted on the second material pellets, so that the iron oxide in the second material pellets is converted into iron, and meanwhile reducing roasting products are obtained through desulfurization; and ore grinding and magnetic separation are conducted on the reducing roasting products, so that metal iron powder and tailings are obtained. By the adoption of the method, the problem that reduction of fayalite in the metallurgical slag is difficult is solved, effective separation of the iron element is achieved, and high-quality low-sulfur metal iron powder can be obtained advantageously.

The invention discloses a comprehensive utilization method of a ferriferous fayalite material, relates to a processing method of the ferriferous fayalite material, and in particular relates to a method for separating and utilizing iron and silicon in fayalite. The method is characterized by comprising the following steps of: grinding the ferriferous fayalite material; mixing with alkaline liquor for leaching reaction; performing solid-liquid separation on obtained reaction slurry to obtain desilicated concentrate and silicon containing alkaline liquor; and oxidizing the desilicated concentrate in air to goethite. The method disclosed by the invention enriches, separates and extracts iron and silicon elements to form two products: goethite and silicon containing alkaline liquor through alkaline liquor leaching, wherein iron and silicon in ferriferous fayalite exist in solid and liquid states, so that the comprehensive utilization ratio of resources is high and the economic benefit is better.

The invention relates to a method for preparing a microwave absorbing material from red mud and coal gangue and application of the microwave absorbing material, belonging to the technical fields of solid waste utilization and microwave absorbing materials. The invention aims to solve the technical problem of efficient and reasonable comprehensive utilization of solid waste red mud and coal gangue.According to a technical scheme in the invention, the method comprises the following steps: subjecting red mud slurry to filter pressing and dispersion so as to obtain dispersed red mud balls; crushing, ball-milling and screening coal gangue to obtain coal gangue powder with moderate granularity; respectively weighing the red mud balls and the coal gangue powder according to a certain ratio, andconducting uniform mixing; and finally, carrying out roasting in an inert atmosphere to obtain the magnetic composite microwave absorbing material loaded with Fe3O4, Fe3O4/Fe, Fe/FeC or elemental Fe.Main phases of the material include fayalite, nepheline and carbon. According to the invention, the solid waste red mud and the coal gangue are used as raw materials to prepare the composite wave-absorbing material, effective recycling of the red mud and the coal gangue is achieved, and reference is provided for comprehensive utilization of the red mud and the coal gangue.

A material heating method includes: a step of charging a silicon-containing carbon steel material into a heating furnace; a step of preheating the material; a first heating step of raising the temperature of the material; a second heating step of lowering the temperature of the material so as to reduce a temperature difference between the surface and inside of the material; a third heating step of raising the temperature of the material; and a soaking step of reducing the temperature difference between the surface and inside of the material. The temperature of the material in the heating furnace is maintained at the melting point of fayalite or lower.

The invention relates to the technical field of steel treatment, in particular to a high-temperature surface red rust removal isolating agent for silicon-containing steel and a red rust removal method. The high-temperature surface red rust removal isolating agent for the silicon-containing steel is prepared from dry powder and water; the dry powder adopts vermiculite powder, nano magnesium silicate, nano chromic oxide, mullite powder, coal ash, laterite and cassava starch; the water is 50 to 70 percent of the total weight of the dry powder. The high-temperature surface red rust removal isolating agent for the silicon-containing steel and the red rust removal method are applicable to protection during heating of the silicon-containing steel, and can effectively reduce loss of iron scale, suppress production of fayalite and reduce the red rust area on the downstream hot rolled surface; the adhesive force between scales and a steel matrix is lowered; after the steel is discharged out of afurnace, the scales are removed through high-pressure water, so that the scales and the isolating agent layer can completely fall off; the red rust area of the hot rolled surface is substantially reduced by 50 percent, and the product qualification ratio and the product quality are effectively improved; during production and use, the high-temperature surface red rust removal isolating agent is pollution-free to the environment, and the production cost is low.

The invention provides a slag tailing metal recovery system based on big data and a recovery process method thereof, and relates to the technical field of copper smelting. The slag tailing metal recovery system based on the big data and the recovery process method thereof comprises a shell, a magnetic separation mechanism, a gas supply device, a telescopic driving device, a screening mechanism and a collecting box, the magnetic separation mechanism is arranged in the middle of the interior of the shell and used for screening magnetite in slag, the left side and the right side of the magnetic separation mechanism are fixedly connected with the shell, and the gas supply device is arranged on the right side of the shell. The left side of the air supply device penetrates through the right side of the shell and is fixedly connected with the shell, the telescopic driving device is arranged on the left side of the shell, and the driving end of the telescopic driving device is fixedly connected with the left side of the magnetic separation mechanism, the screening mechanism is movably connected on the bottom end of the shell, the collecting box is movably connected on the bottom end of the screening mechanism. The problem that the magnetite and fayalite are inconveniently and effectively subdivided due to different sizes of tailings particles, the magnetite and the fayalite in copper smelting tailings is solved.

The invention discloses an increasing production and energy-saving rotary kiln mineralizer of cement, allocating raw material according to mass percent as: 0-5 wt grammite, 5-15 wt sanbornite, 5-45 wt dolostone, 5-15 wt fayalite, 10-40 wt zeolite and 0-10 wt flour. This invention also discloses a preparing method of rotary kiln mineralizer, which comprises by the following steps: bruising separately; mixing dosage; packing; getting end product.

The invention provides a fayalite type furnace slag resource recycling method, and relates to a mineral engineering technology. The method comprises the following steps of carrying out ore proportioning on furnace slag, sodium carbonate and a reducing agent, grinding and uniformly mixing the mixture to obtain a raw material, wherein the furnace slag comprises at least one of copper slag and nickelslag; carrying out reduction roasting on the raw material to obtain a clinker; grinding the clinker, and then adding the ground clinker into water for leaching; carrying out solid-liquid separation on the leached ore pulp, and separating to obtain a sodium silicate solution and leached residues; carrying out carbon separation on the sodium silicate solution to obtain a white carbon black and a sodium carbonate solution; and carrying out iron-copper separation on the leached residues to obtain iron ore concentrate and a copper-rich product. According to the method, efficient separation of zinc, iron, silicon and copper in the fayalite type furnace slag can be realized, and resource utilization can be performed correspondingly. The fayalite type furnace slag resource recycling method is simple in process flow and low in cost, can realize resource utilization of intractable fayalite type furnace slag such as copper slag, nickel slag and the like, and has a wide application prospect and good economic benefits.

The invention discloses a method for preparing copper-bearing iron powder by synergetic reduction and magnetic separation of high-iron copper slag and high-iron manganese ore, and belongs to the technical field of industrial waste slag resource utilization. The method for preparing the copper-bearing iron powder by synergetic reduction and magnetic separation of the high-iron copper slag and the high-iron manganese ore includes the following steps that S1, the high-iron copper slag, the high-iron manganese ore and a composite addition agent are mixed, and pelletizing is conducted to obtain green balls; S2, the green balls are dried and then enter a rotary kiln, reduction coal is added to restore, and thus reduction products are obtained; S3, ore grinding and magnetic separation are conducted on the reduction products to obtain the copper-bearing iron powder; and the composite addition agent is prepared from the components in percentage by mass: 70-90% of limestone and 10-30% of sodiumhumate. According to the method for preparing the copper-bearing iron powder by synergetic reduction and magnetic separation of the high-iron copper slag and the high-iron manganese ore, MnO2 in the high-iron manganese ore is used for participating in the reduction reaction of fayalite and copper sulphide, gibbs free energy of reduction of the fayalite and the copper sulphide is lowered, the reduction reaction is catalyzed, the reduction reaction rate is accelerated, the reduction reaction is facilitated, and thus the metallization ratio and the magnetic separation metal recovery of iron and copper are improved.

The invention belongs to the technical field of harmlessness and recycling of metallurgical and bulk industrial smelting slag waste, and discloses a harmless and reduction method of smelting slag richin fayalite. The harmless and reduction method mainly adopts a hot alkali depolymerization-diluted acid enhanced leaching process, and includes the following steps that (1) the smelting slag rich infayalite is crushed and pulverized into powder, and the smelting slag is depolymerized with a hot alkaline solution to obtain depolymerized slag; and the alkaline solution is a sodium hydroxide solution or a potassium hydroxide solution; and (2) the depolymerized slag in the step (1) is subjected to agitation leaching reaction with a mixed system of diluted acid and oxidant to obtain a leaching solution and harmless and reduced slag. The test results show that the harmless and reduction method treats copper smelting slag rich in fayalite, harmful metals in the copper smelting slag are extracted, the leaching rate of the harmful metals As and Pb in the treated copper smelting slag reaches 99.7% and 99.9%, and the reduction rate of the copper smelting slag can reach 57%.

The invention discloses a method for comprehensively recovering various valuable metals in copper slag floating copper tailings, and belongs to the technical field of metal element recovery. The method comprises the steps of direct reduction roasting, magnetic separation and reverse flotation. According to the method for comprehensively recovering the various valuable metals in the copper slag floating copper tailings provided by the invention, the mixed gas of methane, hydrogen and argon is introduced for direct reduction roasting, magnetite in the copper slag can be completely converted into metal iron, and a composite additive is matched for dissociating fayalite in the copper slag, so that the purpose of resourceful ore phase reconstruction is achieved; and a phase composition in the copper slag is improved, an iron phase in the slag is subjected to a decomposition reaction, and lead and zinc are gasified in the form of metal steam, so that the various valuable metals in the copper slag are comprehensively recycled. Meanwhile, roasting products are treated through magnetic separation and reverse flotation, so that the iron ore concentrate grade is effectively improved, the effective utilization rate of resources is high, the recycling process is simple, energy consumption is low, and high economic benefits are achieved.

The invention relates to a fayalite material with copper slag as a main material and a preparation method thereof. The preparation method comprises the following steps: immersing copper slag particles in boiling water for 1-3 h, filtering, drying, and screening; placing the screened copper slag particles into a muffle furnace, and calcining at 700-850 DEG C for 1-3 h to obtain calcined copper slag particles; adding a hydrochloric acid solution to the calcined copper slag particles, stirring, washing and carrying out suction filtration to prepare a precursor copper slag particles; wet-grinding the precursor copper slag particles until the granularity is less than or equal to 60 microns so as to prepare wet-ground copper slag powder; adding the wet-ground copper slag powder and powdered coke into a pug mill, carrying out vacuum extrusion moulding, storing the product for 24-36 h; placing the product into an electric resistance furnace and heating to 1100-1150 DEG C, carrying out thermal insulation for 1-3 h, and cooling with the furnace so as to prepare the fayalite material with copper slag as the main material. The method has advantages of simple process, low energy consumption, low production cost and no special requirement on equipment. The prepared product has good sintering performance and high fayalite conversion rate.

The present disclosure provides a method for co-extraction of vanadium, titanium and chromium from vanadium slag. The method selectively reduces pyroxene and fayalite wrapped on spinel through low-temperature hydrogen reduction, iron removal by ferric chloride, and low-temperature leaching of the vanadium slag by oxalic acid, thereby destroying a structure of the spinel, dissociating a spinel phase and a silicate phase, and fully exposing the spinel phase. The method also directly leaches the vanadium slag at a low temperature by acidity and strong complexation of the oxalic acid, and destroys the structure of the spinel, such that vanadium, titanium, chromium and oxalate are complexed into a solution to co-extract vanadium, titanium and chromium. The present disclosure extracts vanadium, titanium and chromium from the vanadium slag, with a leaching rate each being greater than 99%.