126 results about "Ilmenite" patented technology

The invention provides an oblique coil electromagnetic classificator for separating weak magnetic impurities from strong magnetic concentrate, which comprises a separation cylinder, an ore feeding device and a flushing device, an ore feeding pipe of the ore feeding device extends into the separation cylinder from the top end of the separation cylinder, the flushing device is arranged below the ore feeding pipe, and an oblique coil is arranged on the outer side of the separation cylinder, so that the weak magnetic impurities can be separated from the strong magnetic concentrate. Magnetic lines of force are obliquely distributed, magnetic linkages formed by magnetic particles are oblique, the whole magnetic linkages can be efficiently impacted in cooperation with vertical component force Fz of water flow of the flushing device, and scattering of magnetic aggregates is facilitated; the tail control flat coil and the concentrate gathering flat coil at the upper end and the lower end effectively control tailings and concentrates respectively, so that the separation efficiency of strong magnetic concentrates and weak magnetic impurities is improved, for example, in the iron-titanium separation operation of vanadium titano-magnetite ore dressing, ilmenite mixed into iron ore concentrates can be reduced, the grade of the iron ore concentrates can be improved, and titanium metal resources can be fully recycled.

The invention provides a smelting method of vanadium-titanium-iron minerals, which comprises the following steps: carrying out reduction roasting on the vanadium-titanium-iron minerals by using a reducing agent to obtain a metallized material; and the metallized material and a slag former are smelted, the slag former comprises sodium salt, and vanadium-containing pig iron and active titanium slag are obtained after smelting is finished. According to the smelting method provided by the invention, a two-step smelting process of pre-reduction and sodium modification smelting is adopted for the vanadium-titanium-iron minerals, so that efficient separation of titanium and iron vanadium is realized, and vanadium-containing pig iron and titanium slag with high additional values are obtained. The titanium slag is high in grade, good in activity and high in acidolysis rate, and the problems that ferrovanadium and the titanium slag are difficult to separate in the vanadium-titanium-iron mineral smelting process, and the titanium slag is poor in activity, low in acidolysis rate and incapable of being economically utilized are solved.

The invention provides a process method for producing ferrotitanium powder by reducing ilmenite, which comprises the following steps of: uniformly mixing ilmenite concentrate with a biomass-coal mixed reducing agent, a nanoscale additive and the like, reducing in a rotary kiln under a temperature-controlled and oxygen-controlled atmosphere, quenching and cooling a product by water, and performing multi-stage ore grinding magnetic separation to obtain metal iron particles and a titanium-rich material; and preparing the two into a ferrotitanium powder product. The process integrates innovative units of raw material homogenization pretreatment, biomass-coal mixed reducing agent dynamic proportioning, LIBS + Raman spectrum on-line monitoring closed-loop control, nano CaO-Na2O composite catalyst buffer addition, finished product multistage magnetic separation reforming and the like. The product composition fluctuation is obviously reduced, the TiO2 content fluctuation is controlled within + / -0.4%, the FeO content fluctuation is controlled within + / -0.5%, the metallization ratio is improved to 90% or above, the heat efficiency is improved by about 20%, and the energy consumption per unit yield is reduced by about 15%. The ilmenite is directly, efficiently and cleanly utilized, a high-quality titanium-rich raw material can be provided for production of titanium dioxide, titanium sponge and the like, meanwhile, the byproduct high-grade iron powder is used for steelmaking, and the comprehensive utilization benefit of resources is remarkable.

The invention provides a flotation method for separating residual slope product titanium placer, and belongs to the field of beneficiation, the flotation method comprises the following steps: grinding a titanium placer flotation raw material until the titanium placer flotation raw material accounts for 60-70% by mass of-0.074 mm, preparing the titanium placer flotation raw material into ore pulp with the concentration of 25-30%, adding a gangue collecting agent for reverse flotation roughing, and separating to obtain a foam product and an in-tank product; a gangue inhibitor and an ilmenite collecting agent are added into a product in the groove for direct flotation roughing, and roughing rough concentrate and roughing tailings are obtained; the roughing rough concentrate is subjected to three times of concentration to obtain titanium concentrate; a gangue inhibitor and an ilmenite collecting agent are added into the roughing tailings for scavenging, and scavenged concentrate and scavenged tailings are obtained; and the foam product and the scavenging tailings are combined, and tailings are obtained. The reverse flotation desliming process is adopted, it is guaranteed that gangue minerals with good floatability in an ore sample are removed as far as possible, the adverse effect of the gangue minerals on ilmenite flotation is reduced, recycling of fine-fraction ilmenite is effectively enhanced, and the TiO2 recycling rate is increased under the action of the efficient inhibitor and the collecting agent.

This invention relates to the field of comprehensive utilization of solid waste, specifically providing a process for treating ilmenite ore using solid waste pyrolysis products. The process involves preheating the ilmenite ore to above 1000°C with low-oxygen flue gas, then feeding it along with waste plastics, waste coke, and other raw materials into a pyrolysis reduction reactor for pyrolysis reduction. The pyrolysis of waste plastics and waste coke generates reducing gases, ensuring the device is completely in a reducing gas atmosphere. These gases react with the ilmenite ore at high temperatures to generate magnetically separable elemental iron and Fe3O4, thereby increasing the actual FeTiO3 content. Compared to existing ilmenite ore processing technologies, this method significantly increases the processing temperature, improves processing efficiency, and achieves comprehensive energy utilization.

The application discloses a beneficiation method of fine-grained omphalite type ilmenite, and can realize efficient recovery of fine-grained omphalite type ilmenite, so that three kinds of flotation titanium concentrates with TiO2 grade of about 47% are obtained, including coarse-grained titanium concentrate, fine-grained titanium concentrate and ultra-fine-grained titanium concentrate, and the total recovery rate of the three kinds of titanium concentrates relative to fine-grained tailing ilmenite is above 50%. The application can improve the flotation-in grade of ilmenite, reduce the tailing grade and reduce the beneficiation cost of ilmenite by adopting the process to beneficiate fine-grained omphalite type ilmenite. The beneficiation process combines gravity separation, magnetic separation and flotation by using the cross effect and combined effect of multiple beneficiation methods, improves the recovery and utilization efficiency of ilmenite, and has obvious economic and social benefits, and can be popularized and applied at home and abroad.

A method for smelting high-proportion sefstromite by using an oxygen blast furnace. The method comprises the following steps: with pure oxygen blowing being used in a blast furnace, injecting pure oxygen, hot coal gas and pulverized coal from a tuyere, adding an iron charge and coke from the top of the furnace, wherein the volume percentage of N2 in coal gas at the top of the furnace is less than 25%, removing CO2 from the coal gas at the top of the furnace, and then recycling same. The method for smelting high-proportion sefstromite by using an oxygen blast furnace in the present invention can achieve such smelting that the proportion of sefstromite in the blast furnace is greater than 60%, the mass fraction of TiO2 in blast-furnace slag is greater than 15%, but smaller than 45%, and the emission of CO2 is reduced by 30% or more, and solves the problems of thick furnace slag, difficulties in slag-iron separation, blast wandering, high costs, high carbon emissions, etc., of conventional blast furnace smelting in the case of an increase in the proportion of sefstromite, thereby achieving higher utilization efficiency of vanadium-titanium resources, lower smelting costs and lower carbon emissions.

The invention relates to a silica ore dressing method which comprises the following steps: step 1, crushing raw ore of silica ore, step 2, grinding the crushed silica ore by adopting a ball mill, step 3, carrying out graded desliming treatment on the ground silica ore by using a hydrocyclone, step 4, carrying out weak magnetic separation on the deslimed silica ore, and step 5, carrying out magnetic separation on the deslimed silica ore. And 5, the non-magnetic material subjected to weak magnetic separation is subjected to strong magnetic separation, and silica concentrate is obtained. Before the ore is subjected to strong magnetic separation, strong magnetic minerals are removed through weak magnetic pre-separation, the strong magnetic separator is effectively prevented from being blocked, the operation stability and the production continuity of equipment are improved, various magnetic impurity minerals including intergrowth particles can be removed to the maximum extent through the whole technological process, and the production efficiency is improved. Such as hematite, limonite, biotite, ilmenite, pyrite and garnet.

The application discloses a kind of simultaneously producing medium, high-quality titanium concentrate flotation method, belong to vanadium-titanium magnetite titanium resource comprehensive utilization field.The application method uses one roughing→one scavenging→four-stage cleaning→scavenging and the middlings of the first two stages are returned in turn→the middlings of the 3rd and 4th stage cleaning are combined and then separately reselected→the tailings of reselection are returned to roughing flotation process and corresponding reagent system make the ilmenite and gangue minerals in ilmenite flotation feed fully separate, simultaneously produce TiO2 Grade ≥49% and TiO2 Grade ≥47% titanium concentrate, and do not affect the total recovery rate of flotation concentrate TiO2, beneficial to subsequent titanium concentrate processing process, can effectively solve the problem that existing flotation method produces high-grade and medium-grade two titanium concentrate products, which will reduce the TiO2 recovery rate of flotation concentrate.

The application provides a high-chromium type ilmenite sorting method and relates to the technical fields of metallurgy and mineral processing. Specifically, the sorting method comprises the following steps: step one, mixing and reacting the high-chromium type ilmenite with a coal-based reducing agent, performing first magnetic separation on the obtained reduction product to obtain a titanium concentrate and a first tailing; step two, performing second magnetic separation on the first tailing to obtain a second concentrate; step three, performing oxidation roasting on the second concentrate, performing third magnetic separation on the roasting product to obtain a third tailing; step four, performing electric separation on the third tailing to obtain a fourth concentrate; and step five, mixing and reacting the fourth concentrate with a coal-based reducing agent, performing fourth magnetic separation on the obtained reduction product to obtain a chromium concentrate. The application can simultaneously obtain high-grade titanium ore, chromium ore and a series of high-value process by-products, and has the advantages of simple method process, high resource recovery rate and easy industrial implementation.

The invention relates to the technical field of mineral processing, in particular to a closed-loop reselection process and system for recovering ilmenite from strong magnetic tailings. According to the invention, strong magnetic tailings are creatively intercepted after coarse grain strong magnetic scavenging operation of a main process, and are guided to enter a set of independent and closed-circuit gravity separation system. According to the system, ilmenite is recycled through gravity separation, internal efficient closed-loop circulation is achieved through middling returning and size grading control, and the titanium metal recycling rate and the concentrate quality are remarkably improved.

The reaction kettle for waste heat recovery in the ilmenite acidolysis process is provided in the paper, and the reaction kettle comprises a reaction kettle body, an ilmenite feeding port, a sulfuric acid feeding port, a cooling water inlet, a cooling water outlet, a discharge port and a cooling water spiral channel, the reaction kettle body is provided with the ilmenite feeding port, the sulfuric acid feeding port and the cooling water outlet above, the cooling water inlet is arranged below the reaction kettle body, the discharge port is arranged at the bottom of the reaction kettle body, the shell of the reaction kettle body is provided with the cooling water spiral channel, the inside of the cooling water spiral channel is coated with a material with good corrosion resistance and heat conduction, the heat generated by the ilmenite acidolysis can be absorbed by the cooling water in the cooling water spiral channel, the waste heat recovery is realized, the recovered hot water can be further used for preheating raw materials or other process links, the energy utilization rate is improved, the production cost is reduced, the problem of waste of waste heat in the ilmenite acidolysis process is effectively solved, and the reaction kettle has a good industrial application prospect.

This invention provides a method for producing reduced ilmenite, belonging to the field of solid-state reduced ilmenite technology. This invention uses a petroleum coke pot furnace to produce reduced ilmenite, utilizing the heat of the pot furnace to reduce carbon-containing titanium ore pellets. Simultaneously, the combustible gases generated by the titanium ore pellets continue to heat the flue, allowing the reduction process to continue without external heat. This method utilizes the low-cost, self-heating mechanism of a pot furnace for producing calcined coke to produce reduced ilmenite, reduced iron, or other carbothermally reducible metal oxides. The pelletizing formula and method used are significantly different from the traditional rotary kiln used for producing reduced ilmenite, facilitating operation within the pot furnace, increasing permeability, and enhancing the reduction effect. This invention not only reduces production costs but also improves the production method of reduced ilmenite.

The invention discloses a method for preparing a titanium-based hydrogen storage alloy in a short process, and belongs to the technical field of metal alloy preparation. The method comprises the following steps: firstly, carrying out hydrogen plasma reduction smelting on a raw material consisting of ilmenite and iron ore to reduce oxides such as titanium and iron in the raw material and volatilize impurity elements in the form of hydride, and then refining by using argon plasma to remove residual elements such as hydrogen in the smelting process to obtain the titanium-based hydrogen storage alloy. Through the mode, the production thought that a traditional titanium-based hydrogen storage alloy depends on high-purity titanium and iron is broken through, the reduction step of the oxide and the refining step of the alloy are integrated in a hydrogen-argon plasma staged smelting mode, the preparation process of the titanium-based hydrogen storage alloy is shortened, the energy consumption in the production process is reduced, the hydrogen reduction reaction product is water, and the production cost is reduced. Carbon emission and pollution are greatly reduced, and the development trend of global green metallurgy is met.

The utility model provides an ilmenite sulfuric acid intermittent premixing device capable of adjusting the proportion, and relates to the technical field of intermittent premixing devices, the top of a device shell is provided with a storage cavity, the bottom of the storage cavity is provided with a splitter plate, the splitter plate is oppositely provided with two groups of splitter holes, one group of splitter holes is communicated with an external sulfuric acid storage container through a curved pipe, and the other group of splitter holes is communicated with an internal sulfuric acid storage container through a curved pipe. The other group of shunting holes are communicated with the interior of the device shell through connecting pipes; the opening and closing control of the two groups of shunting holes is realized through a control device, and the opening and closing states of the two groups of shunting holes are opposite; compared with the prior art, the utility model provides a device capable of metering the volume of concentrated sulfuric acid without depending on a flow meter, the premixing working efficiency is high, the labor intensity of operators is reduced, and the accuracy is higher.

The application relates to a high-selectivity ilmenite flotation process, and belongs to the technical field of flotation, and aims to solve at least one of the problems of poor ilmenite selectivity and poor collecting performance of the existing flotation method. In the ilmenite flotation process, a specific structure of a collector is selected, two hydroxyl imino groups are introduced into the same molecular structure, the solid-philic group formed by the two hydroxyl imino groups can improve the combination capacity between the collector and metal ions; the adsorption stability of the whole collector molecule on the mineral surface is enhanced, the collecting performance and selectivity of the collector molecule are improved; meanwhile, the raw ore is subjected to a plasma pretreatment method, the mineral surface structure can be changed, the impurities on the mineral surface can be reduced, the reaction activity of the mineral surface can be enhanced, the surface property difference between ilmenite and magnesium olivine can be improved, the collector molecule can chemically react with the ilmenite surface under weak acid conditions, the ilmenite flotation separation efficiency is improved, and the amount of sulfuric acid is reduced.

The invention belongs to the technical field of titanium dioxide production waste resource utilization and inorganic polymeric flocculant preparation, and discloses a closed-loop process for preparing artificial rutile and co-producing polymeric ferric sulfate by using titanium dioxide primary washing waste acid. The method solves the problems of low resource utilization rate of titanium dioxide primary washing waste acid, high acid consumption in preparation of artificial rutile and high production cost of polyferric sulfate in the prior art. Comprising the following steps: pretreatment of titanium dioxide primary washing waste acid, reduction pretreatment of ilmenite, preparation of artificial rutile by leaching refined waste acid and reduced ilmenite, recovery of high-iron-content mother liquor, preparation of polyferric sulfate by oxidation-polymerization of the mother liquor, and cyclic utilization of washing water. The grade of the prepared artificial rutile TiO2 is greater than or equal to 92%, and the polyferric sulfate meets the national standard requirement; the waste acid resource utilization rate is larger than or equal to 98%, the comprehensive cost of the two products is reduced by 25-30%, and the method is suitable for waste resource utilization and fine chemical product collaborative production of sulfuric acid method titanium dioxide enterprises.

To provide a method for producing a titanium smelting raw material by which impurities can be separated and removed from ilmenite ore at a low cost in a short time.SOLUTION: An ammonium salt as a reactant is mixed with a pulverized product of ilmenite ore to form a mixture, and the mixture is heat-treated to obtain a reaction product, which is then dissolved in a solvent to form a suspension. A precipitate containing high-concentration TiO2 can be obtained by solid-liquid separation into a solid residue and a leachate and heating the leachate. The stepwise calcination of the precipitate makes it possible to produce anatase and rutile, respectively, with a high TiO2 concentration.SELECTED DRAWING: Figure 1

High quality silver-iron titanate nanoparticles are synthesized using an ilmenite source. The silver-iron titanate nanoparticles were characterized using various analytical techniques. As compared to prior art methods, the disclosed methods provide for the simple, cost-effective synthesis of relatively high-quality silver-iron titanate nanoparticles. The silver-iron titanate nanoparticles can be used in a variety of important agricultural, industrial, and hygienic uses, including in the important area of plant tissue culture explant sterilization.

The invention belongs to the technical field of ferrous metallurgy, and particularly discloses a smelting method of high-harmful-element sefstromite, which provides a basis for stable smelting of a blast furnace by determining key indexes of raw materials and fuels, integrating that the grade of ore entering a furnace is greater than 55%, the thermal reactivity of coke is less than 45% and the strength after reaction is greater than 48%, and setting a reasonable smelting parameter range. And the characteristics of local high-harmful-element sefstromite can be handled. The problems that the content of harmful elements in local ore is high, ore blending before iron making and production stability are negatively affected, and the pig iron smelting cost is increased are solved. By utilizing the advantage of low cost and matching with a pre-ironmaking sintered ore batching mode and a pellet batching mode, airflow in a blast furnace is stable and reasonable in distribution, a hearth keeps uniform and active, long-period stable and smooth operation of the blast furnace is realized, the ore and coke blending cost is greatly reduced, and the cost of each ton of molten iron is reduced.

The application provides a gangue mineral dispersion inhibitor and a preparation method and application thereof, and relates to the field of mineral flotation. The preparation method of the gangue mineral dispersion inhibitor comprises the following steps: mixing phytic acid, oxalic acid and sodium silicate with water to obtain a sodium silicate solution; wherein the mass ratio of the phytic acid, the oxalic acid and the sodium silicate is 1:(1-2):(2-4). The gangue mineral dispersion inhibitor can be used in the process of recovering ilmenite from iron ore tailings. The phytic acid, the oxalic acid and the sodium silicate cooperate with each other, can effectively inhibit various gangue minerals, effectively improve the grade and recovery rate of ilmenite, and improve the problem that ilmenite in the iron ore tailings is difficult to be efficiently recovered.

The invention provides an ilmenite collecting agent and a preparation method and application thereof, and relates to the technical field of mineral flotation separation. According to the preparation method, the ilmenite collecting agent can be efficiently and stably prepared by performing a hydroximation reaction on the cycloalkane carboxylic acid methyl ester compound and the free hydroxylamine solution and combining a preparation process of methanol separation treatment, acidification treatment and freeze-drying treatment; the preparation method is simple and easy to operate, large-scale production is easy, and great innovation is brought to large-scale obtaining of high-grade and high-recovery-rate concentrates through a flotation process of oxidized minerals. The molecular formula of the ilmenite collecting agent is Cn + 1H2n + 1O2N; or is Cn + 2H2n + 2O2N (n is an integer from 3 to 10). And the method can show remarkable advantages in ilmenite flotation. The high-temperature-resistant environment-friendly paint can keep excellent performance under the conditions of different pH values and temperatures, is high in adaptability and low in toxicity, and meets the environment-friendly requirements of green mines.

The invention relates to the technical field of ilmenite grading, in particular to a process for recycling ultra-fine particle grade ilmenite. According to the technology for recycling the ultra-fine-particle-grade ilmenite, the ultra-fine-particle-grade ilmenite recycling technology is deployed and improved from a titanium separation source, according to the characteristics of the ultra-fine-particle-grade ilmenite, the ultra-fine-particle-grade ilmenite is separated out in advance in a fine-particle strong magnetic scavenging operation section through a high-intensity magnetic separator with the ultrahigh magnetic field intensity, and the ultra-fine-particle-grade ilmenite is separated out in advance; a series of problems of long recovery process, large interference of residual chemicals, high recovery cost and the like when the ultra-micro-fine-particle ilmenite is recovered from the titanium separation tail end are solved, and efficient recovery of the ultra-micro-fine-particle ilmenite is realized.

The invention discloses gravity separation equipment for ilmenite separation. The gravity separation equipment comprises a slope separation device, a vertical barrel device, a variable-diameter separation device and a vertical separation section device which are sequentially arranged from top to bottom and communicate with one another. A tailing discharging device is arranged at the top of the inclined surface sorting device; the low-density gangue minerals with large relative granularity entering the inclined surface sorting device are in a suspended state, continue to move upwards on the inclined plate and are conveyed to the tailing discharging device, and the high-density ilmenite with small relative granularity is settled on the surface of the inclined plate and slides downwards; and the concentration of the ilmenite in the vertical barrel device is gradually increased, and finally the ilmenite is discharged from the lower part of the concentrate discharging device, so that efficient, clean and low-cost sorting of the ilmenite can be realized, the TiO2 grade of the ilmenite is improved, and the sorting efficiency and the sorting precision are both considered. The invention further discloses a gravity separation method for ilmenite separation.

The invention discloses a tetrahydroisoquinoline hydroximic acid collecting agent and a preparation method thereof. According to the collecting agent, tetrahydroisoquinoline serves as a basic framework, and various special functional groups such as a chelating group, an ether bond and a hydrogen bond donor are contained. The preparation method comprises the steps that tyrosine methyl ester and formaldehyde react in a solvent concentrated hydrochloric acid to generate a tetrahydroisoquinoline ring skeleton, then the tetrahydroisoquinoline ring skeleton and brominated hydrocarbon react in an alkaline environment to generate ether, and finally a hydroximation reaction is conducted to obtain the corresponding hydroximic acid collecting agent. The collecting agent of the type has very high chelating capacity, shows good collecting performance and selectivity in ilmenite flotation, and can effectively improve the grade and the recovery rate of ilmenite concentrate.

A method of making upgraded synthetic rutile (100) can include binding ilmenite ultrafine particles together with a binder to form green pellets (110). Iron can be reduced in the green pellets by heating the green pellets to a reducing temperature under a reducing atmosphere (120). The ilmenite ultrafine particles within the green pellets can be at least partially sintered together by heating the green pellets at a sintering temperature to form at least partially sintered pellets (130). Iron can be removed from the at least partially sintered pellets by leaching to form upgraded synthetic rutile (140).

The application discloses a titanium iron ore equipment configuration and process returning method, relates to the technical field of ore dressing, and comprises titanium roughing operation, titanium scavenging I operation, titanium scavenging II operation, titanium concentration I operation, titanium concentration II operation, titanium concentration III operation and titanium concentration IV operation, each operation adopts the same number of flotation machines: a single froth tank is arranged for the first flotation machine, and one froth tank is shared by other flotation machines; froth products of the first flotation machine of the roughing and concentration operations are returned to the first flotation machine of the next operation, froth products of other flotation machines are returned to the second flotation machine of the next operation, froth products of the first flotation machine of the scavenging operation are returned to the first flotation machine of the previous operation, froth products of other flotation machines are returned to the second flotation machine of the previous operation, and underflow of the concentration operation is returned to the second flotation machine of the previous operation. The application realizes differential separation of titanium iron ore, reduces the circulating load of middlings, reduces the sulfuric acid consumption, improves the enrichment effect of the concentrate, and finally achieves the effects of improving the quality of the concentrate and the system recovery rate.

This invention provides a chemical chain gasification method for Chlorella, belonging to the field of biomass energy conversion technology. The invention involves acid treatment of Chlorella to remove endogenous alkali (earth) metals and some ash, avoiding interference with the gasification reaction while retaining the organic active components of Chlorella. Calcination of ilmenite improves its mechanical strength, facilitating recycling, and converts it into an active state, enhancing its reactivity and increasing its selectivity for H2 and CO, particularly H2. This achieves efficient gasification of Chlorella, yielding high-purity syngas. Furthermore, the use of natural ilmenite reduces costs.

The invention discloses an iron oxide ore combined collecting agent and application thereof, and belongs to the technical field of mineral flotation. According to the combined collecting agent, a multi-element mixed coordination field is constructed through dihydroxamic acid and oximido, a stable composite adsorption layer is formed, and meanwhile, a dense hydrophobic layer is constructed on the surface of a mineral through the hydrophobic synergistic effect of a flexible aliphatic chain and a rigid benzene ring. The application of the combined collecting agent in iron oxide ore flotation comprises the steps that after iron oxide ore is smashed and subjected to size mixing, the combined collecting agent and a foaming agent are added, an oxidizing agent can also be added, and concentrate is obtained after air inflation flotation. The combined collecting agent can achieve efficient flotation of ilmenite, hematite and siderite under the mild condition, and has the advantages of being good in selectivity, high in recovery rate, small in dosage and environmentally friendly.

The invention relates to a method for preparing magnetic artificial rutile from acid-soluble titanium slag, which comprises the following steps: heating and converting the acid-soluble titanium slag, hematite, a reducing agent and B2O3 into liquid molten slag, blowing air into the molten slag at a heat preservation temperature after heat preservation is finished for oxidation, cooling after oxidation, embedding fine ilmenite crystal grains into rutile crystals in the cooling process, and forming the magnetic artificial rutile by using the ilmenite crystal grains. The rutile indirectly has magnetism, and finally the modified slag containing the magnetic artificial rutile is obtained; performing magnetic separation to obtain artificial rutile concentrate and tailings; and pickling to obtain the high-grade artificial rutile. The modified slag containing the magnetic artificial rutile is prepared through additive adding and high-temperature oxidation, then the magnetic artificial rutile is separated from gangue by means of magnetic separation, the artificial rutile concentrate is obtained, the process is economical and environmentally friendly, the hydrochloric acid consumption and the waste liquid output in the follow-up pickling process are remarkably reduced, and the production cost is reduced. And the TiO2 content of the product artificial rutile is greatly improved, and high value-added utilization of the acid-soluble titanium slag is realized.