117results about How to "Improve the effect of magnetic separation" patented technology

The invention discloses a separation and purification method of electrolytic aluminum scraps, characterized by comprising the following steps of: crushing electrolytic aluminum scraps in a wet type, floating and magnetically separating, firstly removing iron and silicon and separating to obtain carbon powder and another raw material A; and putting the raw material A in an electric furnace, electrifying to dissolve fluoride salt, restoring harmful impurities in the scraps into an elementary substance metal state by utilizing metal aluminum, precipitating at the bottom of the electric furnace and secondarily removing the iron and the silicon to obtain an electrolyte B. The invention has the advantages that metal aluminum particles in electrolytic aluminum scraps in the electric furnace is utilized as a low-cost reducing agent to restore and precipitate iron, silicon and other harmful impurities at the bottom of the furnace when the fluoride salt is in a dissolved state so as to solve the problem that iron fluoride with high stability is hard to remove, and the reducing agent is utilized in the floatation process to improve the magnetic separation effect. For a product obtained in an electric furnace melting system, an acid-method process is adopted to convert alumina into cryolite, thirdly remove silicon and obtain a byproduct of ammonium bicarbonate.

The invention provides a method for comprehensive treatment of household refuses and secondary pollution control. The method comprises the following procedures of: 1) coarse separation of the household refuses; 2) pretreatment of the household refuses; 3) fine separation of the household refuses; 4) aerobic composting of the household refuses; 5) biological organic fertilizer preparation; 6) fabrication of refuse derived fuels; and 7) secondary pollution control. The method employs parallel dual-separation lines which are compact in arrangement; each functional unit device is rational in configuration, easy to operate and mechanically control; the sorting efficiency and the energy source recovery effect are obviously improved; and minimization, harmless treatment, recycling and energy conversion of the household refuses can be realized.

The invention discloses a magnetic selection method for an electrolytic aluminum waste material. The electrolytic aluminum waste material is subjected to wet-type breakage and floating selection. The method is characterized by comprising the following steps of: adding a reducing agent into the electrolytic aluminum waste material; converting the surface of a hematite-contained particle in the waste material into magnetite; and removing ferrum and silicon in magnetic selecting equipment and separating to obtain carbon powder and other raw materials. The hematite (Fe2O3) on the surface of an impurity particle is converted into the magnetite (F3O4) with strong magnetism by utilizing the trace reducing agent in the process of floating selection, the effect of the magnetic selection is greatly improved, and the effect of a gradient magnetic separator can be achieved by adopting a common magnetic separator. Then, the initially separated carbon powder is subjected to alkali type dissolving, the cryolite (Na3AlF6) is separated, and the processed carbon powder (ash content being 1-2 percent) reaches the grade of high-purity carbon powder and greatly improves the market value of products.

Magnetic particles having porous surfaces are obtained by forming a polymer part (B) soluble in an organic solvent (S) and a polymer part (C) insoluble in the organic solvent (S) on surfaces of magnetic matrix particles (A) and causing the polymer part (B) to come into contact with the organic solvent (S).

The invention relates to a high-pressure roller selective comminuting and magnetic separating method for lean magnetite ore. According to the method, ultrafine crushing is conducted on raw magnetite with a grade of 28.59% by means of a high-pressure grinding roller, and three times of ore grinding, two-section dewatering and three-section magnetic separation are conducted on the crushed product to obtain concentrate with a grade of 68.23% and metal recovery rate of 82.35%. The method has the advantages that the recovery rate of the final concentrate can be increased, and efficient recovery and utilization of resources are achieved; the dissociation degree of the product is high, excessive grinding degree is low, follow-up magnetic separation effect is good, and the separation precision of equipment is improved; on the premise that the quality of the concentrate is guaranteed, concentrate recovery rate can be increased, iron ore resources can be recovered and utilized fully and reasonably, and resource waste is reduced.

The invention discloses a method for recycling red mud to pulp the red mud. The method is characterized in that a reducing agent is added into the red mud, iron-containing particles in the red mud are reduced into magnetite particles, and then the magnetite particles are subjected to magnetic separation to obtain an iron-containing product A; and then the red mud subjected to the magnetic separation is used to prepare a baked brick product B. The applicant summarizes a set of method for preparing the baked brick, wherein a brick body prepared by the red mud is put into a mixed liquor of sodium silicate solution and barium sulfate, and then is blown to be dry by carbon dioxide, then a layer of barium sulfate protection film is covered on the surface of the brick body to shield the radioactivity. According to the method for recycling the red mud, the construction wastes being waste materials are added as aggregate, so that the strength of the brick body is improved, the fusion points of refractory materials can be reduced by adding a little fluoride salt, and various construction wastes and the red mud can be sintered together at a lower temperature.

The invention discloses a belt-type dry magnetic separator. The belt-type dry magnetic separator comprises a housing, the upper part of the housing is provided with a feeding inlet, a feeding device is arranged below the feeding inlet, a magnetic separation device is arranged above the feeding device, the magnetic separation device comprises a magnetic separation belt, along a material conveying direction of the feeding device, a primary separation magnetic system and a refined separation magnetic system are orderly arranged in the magnetic separation belt in parallel, a conveying tail end of the feeding device is not in a magnetic material discharge range of the refined separation magnetic system, a magnetic field range of the primary separation magnetic system covers materials on the feeding device, a magnetic field of the refined separation magnetic system is an alternating magnetic field, and magnetic field ranges of the primary separation magnetic system and the refined separation magnetic system are superimposed. The belt-type dry magnetic separator continuously treats a crushed magnetic material so that a product with quality close to that of water separated products is obtained, strictly controls mine tailing magnetic object quality, has a high treatment capability and a large tailings discarding rate, has a very wide mineral particle fraction application range and reduces a later technical equipment investment and a system operation cost.

The invention discloses a method for removing iron titanium from non-metallic mineral raw materials and relates to the method for removing iron titanium from the non-metallic mineral raw materials in the ceramic industry. The method comprises the steps of firstly grinding non-metallic raw ores into 250 meshes-300 meshes, preparing ore pulp with water content of 50%-70%, then adding a dispersing agent, adding a pH adjuster, regulating pH to 5.5-7.0, evenly stirring, adding magnetic seeding particles which are pre-dispersed in water, then standing for 12-24h, diluting till the water content of 80%-85% after the completion of standing, further using two permanent-magnet high-gradient magnetic separators which are connected in series for carrying out magnetic separation, collecting magnetic seeds after the ore pulp passes the magnetic separators completely, and recycling the magnetic seeds after drying. The method determines the optimum process parameters, achieves the purpose of saving energy, reducing consumption and reducing production cost under the condition of ensuring high processing efficiency of impurities of iron and titanium and has great application prospects.

The invention discloses a method for separating iron, zinc and carbon in blast furnace sludge. The method for separating the iron, the zinc and the carbon in the blast furnace sludge comprises the steps that the blast furnace sludge is oxidized after being directly magnetically roasted; wet magnetic separation is conducted after proper ore grinding, so that iron concentrate from magnetic separation and tailing zinc-rich materials are obtained; zinc in the zinc-rich materials is extracted by means of a leaching agent, so that a zinc-rich solution and carbon powder are obtained. All products obtained by treating the blast furnace sludge through the method can be effectively utilized, and zero discharge of solid waste of the blast furnace sludge is achieved. The method for separating the iron, the zinc and the carbon in the blast furnace sludge has the advantages that the technique is simple, investment is small, energy consumption is low, and the treatment effect is good. The method for separating the iron, the zinc and the carbon in the blast furnace sludge can provide important theoretical guidance and technical support for comprehensive utilization of blast furnace sludge resources in iron and steel plants.

A method for producing coated, fine metal particles comprising the steps of mixing powder comprising TiC and TiN with powder of an oxide of a metal M meeting the relation of ΔG_M-O>ΔG_TiO2, wherein ΔG_M-O represents the standard free energy of formation of metal M oxide, and heat-treating the resultant mixed powder in a non-oxidizing atmosphere to reduce the oxide of the metal M with the powder comprising TiC and TiN, while coating the resultant metal M particles with Ti oxide, and coated, fine metal particles each comprising a metal core particle and a Ti oxide coating and having a carbon content of 0.2-1.4% by mass and a nitrogen content of 0.01-0.2% by mass.

The invention relates to preparation and applications of a magnetic composite porous network adsorbing material, wherein the preparation method comprises: (a) preparing a magnetic porous organic framework material with strong adsorbability and large specific surface area by adopting an in-situ growth method, and (b) synthesizing a novel composite porous network adsorbing material with a core-shellstructure through a sonogashira coupling reaction so as to achieve the selective adsorption and efficient enrichment of food and environment pollutants. According to the present invention, the prepared magnetic composite porous network adsorbing material has good particle size uniformity and significantly efficient adsorption capacity on target pollutants, the separation step during solid-phase extraction is greatly simplified due to the magnetic characteristic of the material, and the microporous organic coating changes the hydrophobicity of the surface of the material, such that the material has high stability in a humid environment, can well play a role in an organic solvent, and is suitable for adsorption and enrichment of various food pollutants.

An air-suspending dispersion dry separation belt magnetic separator comprises a shell with a closed inner cavity. A non-magnetic-conduction annular belt is installed in the closed inner cavity. One section on the lower portion of the non-magnetic-conduction annular belt is a magnetic separation section. A conveying tank, a non-magnetic product receiving hopper and a magnetic product receiving hopper which are located below the magnetic separation section and sequentially arranged in the operation direction of the magnetic separation section are arranged in the closed inner cavity. A conveyingpassageway for conveying materials to the non-magnetic product receiving hopper is defined by the conveying tank and the magnetic separation section. A magnetic separation magnetic system is arrangedabove the magnetic separation section and extends to the portion above the magnetic product receiving hopper from the portion above the conveying tank. A material distribution device is installed on the shell. The air-suspending dispersion dry separation belt magnetic separator further comprises an air-suspending dispersion device used for conveying the materials to the non-magnetic product receiving hopper in a dispersion and suspension state in the conveying passageway. By means of the magnetic separator, the powder dry magnetic separation efficiency, the magnetic separation effect and the product taste can be greatly improved, and the air-suspending dispersion dry separation belt magnetic separator is simple and compact in structure, stable and reliable in work, high in processing capacity and convenient to operate and control.

The invention discloses a method for detecting the magnetism of a weakly-magnetic mineral, wherein the method may achieve an optimum magnetic separation effect by selecting field intensity corresponding to certain ore when the certain ore is required to be subjected to magnetic separation. The method comprises flows of: (1) a sample ore preparing step of fragmenting, grinding, and screening raw ore ; (2) a slurry forming step of pouring the grinded ore into water and stirring the grinded ore in order to form ore mortar, wherein the content of the ore in the ore mortar maintains between 10 and 40 percent; (3) a magnetic separation step of uniformly mixing the ore mortar and adjusting and increasing background field intensity increased from 0.05T to a maximum value in such a manner that 0.2 or 0.3T is increased every time; and an analysis step of analyzing magnetic ore concentrate and final tailings in each field intensity in order to obtain magnetic substance mineral constituents. Accordingly, the method has characteristics of simple operation, convenient field intensity selection, and good magnetic separation effect.

The invention relates to an iron-making method adopting carbothermal pre-reduction, gas-based deep reduction and synchronous cooling, and belongs to the field of non-blast furnace ironmaking. The problems of low carbon thermal reduction degree, low gas-based reduction rate and long cooling time of existing pellets and complex gas source isolation control system due to different gas sources of a reduction section and a cooling section during gas-based reduction are solved. The iron-making method adopting carbothermal pre-reduction, gas-based deep reduction and synchronous cooling comprises thefollowing steps that 1, the carbon-containing pellets are subjected to pre-reducing by using a rotary hearth furnace to obtain porous pre-reduced metalized pellets; 2, the porous pre-reduced metalizedpellets are discharged into a vertical reduction cooling reactor in a hot state, and subjected to countercurrent reduction and heat exchange with cold-state reducing gas; and 3, the high-temperaturegas subjected to reduction and heat exchange is subjected to heat exchange through a waste heat boiler, physical heat is utilized, and after the cooled gas is dehumidified and subjected to impurity removal, unreacted reducing gas returns to the vertical reduction cooling reactor to be recycled. According to the method, the high reduction degree effect that the pellet metallization rate is larger than 90% within 3 h-5 h is achieved.

The invention belongs to the technical field of waste electroplated part magnetic separation, and specifically relates to magnetic separation equipment used in the process of recycling copper and nickel salt from waste ABS electroplated parts. The magnetic separation equipment comprises a magnetic drum. A feeding bin is arranged above the magnetic separation cylinder. A feeding motor is fixed to the upper surface of the feeding bin, a material guiding pipe inserted into the magnetic separation barrel is arranged at the lower end of the feeding bin, an output shaft of the feeding motor extendsinto the lower end of the feeding bin to be connected with a rotating rod, a spiral blade penetrating through the material guiding pipe is arranged on the rotating rod, and a circular material throwing plate is connected to the lower end of the rotating rod. According to the magnetic separation equipment, ABS crushed materials are subjected to primary magnetic separation through centrifugal force,the crushed materials are divided into three types, then ABS inclusions are subjected to magnetic separation through secondary magnetic separation, the magnetic separation efficiency is high, and themagnetic separation effect is excellent.

The invention discloses an efficient separation and recycling method for an RO phase in steel slag. The method comprises the following steps: 1) crushing the steel slag; 2) loading electric charges; 3) carrying out RO phase separation; and 4) carrying out separation and recycling. The method disclosed by the invention has the advantages that the steel slag is taken as a treating object, firstly the steel slag is crushed and screened, particle size is less than 100 meshes, and then steel slag micro powder passes through an electric charge loading device, so that fine powder particles carry thesame electric charge and produce electrostatic repulsion mutually, and ultra-dispersed treatment is realized; then air is blasted, so that the fine powder particles pass through an electromagnetic separator in a suspension state, the RO phase is separated and removed, residual materials are recycled, utilization rate of the steel slag is improved, and the method disclosed by the invention is significant to comprehensive utilization of resources and environmental protection.

The invention relates to an integrated domestic solid waste treatment device which comprises an extruding and separating component, a crushing component, a drying component, a magnetic separation component, a pyrolysis screening part and an evaporating and condensing component. Through specifically arranging all components, optimization of integrated procedures including water removal, crushing, drying, magnetic separation, pyrolysis and screening of solid waste and oil gas condensation is realized, secondary pollution free treatment of solid waste is realized, solid contents in the solid waste are recycled to the maximum, and at the same time, sewage in the solid waste is also treated to truly realize harmless disposal.

The invention particularly relates to a magnetic separator comprising a magnet (3), a feed port (5), a stand (1), a fixed shaft (2), the magnet (3), a rotary drum (4), the feed port (5), a motor (7), a first discharge port (8) and a second discharge port (9), wherein the feed port (5) is positioned at the top end of the stand (1); and the first discharge port (8) and the second discharge port (9) are positioned at the lower end of the stand (1). The fixed shaft (2) is fixedly connected with the stand (1), the fixed shaft (2) is connected with the rotary drum (4) by a bearing, the magnetic (3) is positioned between the rotary drum (4) and the fixed shaft (2) and is connected with the fixed shaft (2), a power output end of the motor (7) is connected with a power input end of the rotary drum (4), a section of the magnet (3) is a sector magnet extending to the first discharge port (8) from the feed port (5), and the second discharge port (9) is positioned on the rear side of the sector magnet. By utilizing the magnetic separator, iron impurities can be automatically cleared, and the magnetic separation effect is good.

The invention relates to a feeding device, in particular to rotary magnetic separation equipment for quartz sand utilized as a building material, and aims to solve technical problems in the prior art.In order to solve the above technical problems, the rotary magnetic separation equipment which is applicable to the quartz sand utilized as the building material, has the intermittent adding function, and is good in magnetic separation effect is provided. The rotary magnetic separation equipment for the quartz sand utilized as the building material comprises ab racket and the like, wherein the bracket is connected with the right side of the top of a base; a discharging mechanism is connected with the left end of the bracket; and a magnetic separation mechanism is connected with the left sideof the inner top of the bracket and positioned on the right side of the discharging mechanism. By adoption of the designed rotary magnetic separation equipment for the quartz sand utilized as the building material, the quartz sand can be quantitatively and intermittently added; the manual adding operation is not needed; more convenience is brought; and through the arrangement of a motor, a secondrotating rod and a third rotating rod, the automatic, quantitative and intermittent adding operation can be achieved without manually moving a connecting rod.