219 results about "Ilmenite" patented technology

The invention relates to a preparation method of simulated lunar soil suitable for resource utilization, which comprises the following steps: S1, crushing a basalt sample and carrying out primary magnetic separation to obtain a primary magnetic separation sample; s2, the primary magnetic separation sample is ground, the ground primary magnetic separation sample is subjected to a heating hydrogen reduction reaction, and a hydrogen reduction product is obtained; s3, carrying out secondary magnetic separation on the hydrogen reduction product, and drying the iron-removed sample to obtain a secondary magnetic separation sample for later use; s4, the ilmenite powder and reducing gas are mixed to react, an ilmenite mixture containing elemental iron is obtained, and then the ilmenite mixture is sintered and smashed to obtain ilmenite particles; s5, mixing the secondary magnetic separation sample obtained in the step S4 and the ilmenite particles obtained in the step S5 according to a preset mass ratio, performing tabletting treatment, and sintering in an inert atmosphere to obtain a mixed sintering sample; and S6, crushing the mixed sintering sample to obtain the simulated lunar soil particles. The simulated lunar soil conforms to the actual symbiotic combination rule of lunar soil minerals.

The invention relates to the technical field of mineral separation, in particular to ilmenite preparation equipment and method.The ilmenite preparation equipment comprises an ilmenite preparation mechanism, the ilmenite preparation mechanism comprises a supporting frame, a driving mechanism is arranged on the supporting frame, and a spiral groove and the driving mechanism are jointly provided with an anti-accumulation mechanism; the driving mechanism is used for driving the anti-accumulation mechanism to ascend and descend on the spiral groove in a spiral path, and a plurality of separation mechanisms are arranged on the spiral groove. The device has the advantages that the anti-accumulation mechanism is driven by the driving mechanism, the unblocking plate and the unblocking piece are adjusted according to conditions and needs for operation, and the treatment flexibility of the blocked position of heavy ore particles is improved under the condition that the interference to ore pulp flowing is reduced; the flow velocity of the middling zone is slowed down through the separation mechanism, separation of light and heavy ore particles in the middling zone is accelerated, and the separation effect is improved; and through cooperation of the anti-accumulation mechanism and the separation mechanism, the heavy ore particles in the wave-shaped groove position are regularly released.

The invention provides a titanium carbide preparation process, and relates to the technical field of carbide preparation, the titanium carbide preparation process comprises the following steps: S1, selecting ilmenite with the phosphorus content of less than 100 ppm, crushing, reducing, concentrating, hydrolyzing, washing and filtering to generate a titanium dioxide filter cake; the pore diameter of titanium dioxide is controlled to be 1-5nm, the phosphorus content is less than 50ppm, and the sulfur content is less than 0.1%; s2, pulping the titanium dioxide filter cake obtained in the step S1 to form primary slurry, adding carbon black according to the content of titanium dioxide, and uniformly stirring to form secondary slurry; s3, continuously stirring the secondary slurry, and pumping the secondary slurry into a spray dryer for spray drying to generate titanium dioxide-carbon black particles; and S4, the titanium dioxide-carbon black particles pass through a high-temperature roasting area under the action of airflow and gravity to generate titanium carbide powder. According to the method, the mixing uniformity of the carbon black is larger than or equal to 95%, the yield of the titanium carbide is increased to 99.5% or above, and the quality and the yield of the finished titanium carbide are greatly improved.

The invention belongs to the field of mineral flotation, and particularly relates to a collecting agent, a flotation reagent and a method for flotation of ilmenite, the collecting agent comprises at least one of a collecting agent a, a collecting agent b and a collecting agent c, the collecting agent a is a component with a formula 1 # imgabs 0 # structure, and the collecting agent b is a component with a formula 2 # imgabs 1 # structure; and the collecting agent c is a component with a structure as shown in a formula 3 # imgabs2 #. Researches show that an adopted collecting agent a and / or a collecting agent b can serve as a high-selectivity collecting agent of the ilmenite and have / has the high collecting capacity for the ilmenite, in addition, the collecting agent a and / or the collecting agent b do not have the collecting capacity for gangue minerals such as titanaugite and can be suitable for flotation separation of the ilmenite and the gangue minerals such as the titanaugite, and therefore the flotation separation efficiency of the ilmenite and the gangue minerals such as the titanaugite is improved. And high-grade titanium concentrate is obtained.

The invention relates to the technical field of ore separation, in particular to titanium-zirconium ore tailing check separation equipment and method.The titanium-zirconium ore tailing check separation equipment comprises a variable-diameter chute and a magnetic enrichment assembly, and the variable-diameter chute comprises a low-speed layer, a high-speed layer and a medium-speed layer which are sequentially connected from top to bottom; the magnetic enrichment assembly is arranged on the inner ring of the variable-diameter chute; tailing ore pulp spirally flows at a low speed when entering the low-speed layer, magnetic minerals in the tailing ore pulp are attracted to the inner edge to complete sufficient sedimentation, radial layering is conducted under the centrifugal force effect of high-speed spiral flowing when the tailing ore pulp enters the high-speed layer, and magnetic aggregates generated by the magnetic minerals are disintegrated by repulsive force at the moment; ilmenite and zirconite are fully separated to improve the grade, magnetic minerals are enriched towards the inner edge again while the flow speed is reduced after the ilmenite and the zirconite reach the medium-speed layer, the ilmenite with the enriched inner edge is prevented from being scoured for the second time, and therefore the recycling rate is improved; the problem that the tailing recycling rate is low due to the fact that the fine grain content of the tailings is high and the sorting difficulty is high is solved.

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 discloses a sefstromite grinding and selecting method which comprises the following steps: performing coarse grinding and selecting on a sefstromite raw material to separate out fine-grained ilmenite and coarse grinding and selecting weak magnetic concentrate; carrying out spiral-flow type grading on the coarse grinding and separation weak magnetic concentrate, carrying out fine grinding on a sand setting product obtained by spiral-flow type grading, and carrying out spiral-flow type grading on an obtained ore discharging product again; an overflow product obtained through spiral-flow type grading is graded through a high-frequency screen, and an oversize product of the high-frequency screen is subjected to superfine grinding; mixing the ore grinding product obtained by superfine grinding with the undersize product of the high-frequency sieve, and performing primary separation to obtain primary separation section weak magnetic concentrate and primary separation section weak magnetic tailings; and elutriating the weak magnetic concentrate in the primary separation section to obtain the vanadium-titanium-iron concentrate. According to the vanadium-titanium-iron ore grinding separation method, the cost of the vanadium-titanium-iron ore concentrate purification process can be reduced, the product quality of the vanadium-titanium-iron ore concentrate is improved, and efficient recovery of the vanadium-titanium-iron ore concentrate is achieved.

The invention introduces a method for preparing artificial rutile by using reduced ilmenite, which comprises the following steps: S1, adding reduced ilmenite into a corrosion tank, introducing oxidizing gas to carry out corrosion reaction, and washing and separating the reaction product through a cyclone and a high-frequency sieve to obtain primary artificial rutile and hydrated iron oxide slurry; s2, carrying out filter pressing on the hydrated iron oxide slurry obtained in the step S1 by using a filter press, and preparing refined iron oxide from the obtained iron oxide slurry; s3, the primary artificial rutile obtained in the step S1 is washed and then subjected to a hydrochloric acid leaching reaction, a mixed material obtained after acid leaching enters a thickener, and supernatant returns to prepare an acid leaching solution; feeding lower-layer ore grains into a belt filter for deacidification and washing; and S4, drying the cleaned primary artificial rutile obtained in the step S3 through a drying cylinder to obtain the finished artificial rutile. Industrial hydrochloric acid is used as a rusting agent, and compared with ammonium chloride, the product Fe (OH) 3 can be separated more easily. Oxidizing gas used for rusting is mixed gas of air and pure oxygen, and the mixing proportion of the air and the pure oxygen can be dynamically adjusted according to different rusting raw materials, so that the reaction condition is in an optimal state. In the corrosion and acid leaching processes, the recycling efficiency of the liquid raw material is extremely high, and the prepared artificial rutile meets the requirements of a chlorination process titanium dioxide raw material. The whole process flow is reasonable in design, simple to operate, free of environmental pollution and easy for industrial production.

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 present invention discloses a method for comprehensively utilizing TiO2 in molten salt chloride slag, adopts slag separation ‑ pre-screening classification ‑ coarse particle flotation ‑ fine particle classification gravity separation process to obtain a titanium concentrate product with high TiO2 content, achieves the effect of significant enrichment of TiO2, enables it to be used alone as a titanium concentrate product, added into a titanium concentrate electric furnace smelting operation or as a sulfuric acid process titanium dioxide raw material, realizes high-value resource utilization of solid waste; overcomes the defects of currently taking storage or landfill mode for processing of molten salt chloride slag, which will occupy a large amount of land resources and has environmental risks, and lays the foundation for the further comprehensive utilization of vanadium titanium magnetite ilmenite concentrate molten salt chloride slag. The method has the advantages of relatively low process cost and easy industrialization, can be widely used in the field of comprehensive utilization of vanadium titanium magnetite high calcium magnesium titanium concentrate molten salt chloride slag, and has great practical value and promotion value.

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.

The utility model relates to a full-size-fraction ilmenite flotation device, and aims to solve the problems that the current full-size-fraction ilmenite flotation device is directly connected with a gas guide pipe to enable gas to automatically enter the flotation device, so that the speed of the gas entering a flotation machine body is reduced; the technical problems that the flotation machine body is not thorough in flotation of the whole-fraction ilmenite due to low ventilation efficiency, and an air blowing impeller cannot rotate along with a first belt pulley at the same time and at the same speed, so that the speed of air entering the flotation machine body cannot be automatically adjusted along with the speed during flotation of the whole-fraction ilmenite are solved. Comprising a flotation machine body, a bearing seat is fixedly installed at the top end of the flotation machine body, one end of the bearing seat is rotationally connected with a first belt pulley, the speed of gas entering the flotation machine body is increased, and the phenomenon that flotation of whole-fraction ilmenite is not thorough due to low ventilation efficiency of the flotation machine body is avoided.

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 invention relates to the technical field of mineral separation, in particular to magnetic separation equipment and a mineral separation process for preparing titanium concentrate powder from ilmenite, and the equipment comprises a bracket, a primary hopper, a secondary hopper and a multi-stage magnetic separation roller system. The magnetic separation roller is of a hollow shaft, a fan-shaped magnetic part and a roller structure, the magnetic part is composed of a magnetic conduction base plate and neodymium iron boron magnetic blocks arranged at intervals, the magnetic field is enhanced through the combination of the perpendicular magnetizing direction and the parallel magnetizing direction, and efficient adsorption separation of iron ore powder and titanium ore powder is achieved. The primary magnetic separation roller and the secondary magnetic separation roller are combined to separate iron fine powder, titanium fine powder and tailings. The process comprises the steps of ilmenite raw stone screening, crushing and grinding, wet magnetic separation and secondary magnetic separation after returned material dewatering and drying, the purity of titanium fine powder is improved through multi-stage separation, and resource recycling is achieved. The magnetic separation structure is high in innovativeness and separation efficiency, and the comprehensive utilization rate of ilmenite is remarkably increased.

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 invention relates to a titanium separation process for ilmenite, which belongs to the technical field of mineral separation and comprises the following steps: screening raw materials to form screen underflow; after the undersize article position is lifted, magnetic substances are formed, and concentrated materials are formed through desliming and concentration; screening the concentrated material to form a coarse material and a fine material; the fine materials enter the first-section spiral chute to form first-section concentrate, first-section middlings and first-section tailings, the first-section middlings enter the second-section spiral chute to form second-section concentrate, and the second-section middlings, the second-section tailings and the first-section concentrate enter the third-section spiral chute to form third-section concentrate, third-section middlings and third-section tailings; after the first-section tailings and the second-section tailings are preferably selected, tail concentrate is formed and returns to the first-section spiral chute for re-selection; the second-section concentrate enters a third-section spiral chute, and the second-section middling returns to the second-section spiral chute for re-separation; and dehydrating the third-section concentrate to form a finished product, returning the third-section middling to the third-section spiral chute for re-separation, returning the third-section tailings to the second-section spiral chute for re-separation, and finishing separation. The method has the effects that the tail running amount is reduced, and adverse effects on the recovery rate are reduced.

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 present invention discloses a beneficiation method for vanadium-titanium magnetite containing olivine, including beneficiation of vanadium-titanium iron concentrate, beneficiation of coarse-fine mixed titanium concentrate, and beneficiation of ultrafine-grade titanium concentrate. In the iron beneficiation of the present invention, multi-stage grinding and separation with three or more stages are implemented. Weak magnetic scavenging is set for each stage of iron separation, which not only ensures the quality of vanadium-titanium iron concentrate while reducing over-grinding of ilmenite, but also reduces the iron separation cost while protecting the subsequent strong magnetic equipment for titanium separation; the coarse-grained gravity separation concentrate and the fine-grained gravity separation concentrate are mixed and fed into the titanium separation grinding and classification, ensuring the full dissociation of the useful mineral ilmenite and creating conditions for further enrichment in the subsequent process; the fine-grained gravity separation tailings, the tailings from the third and fourth stages of iron separation are concentrated and de-sludged and then further enriched to obtain ultrafine-grade titanium concentrate, greatly improving the problem of large loss rate of titanium caused by the large content of ultrafine-grade ilmenite and high TiO2 grade in the fine-grained gravity separation tailings. At the same time, ultrafine-grade titanium concentrate is obtained, and the overall titanium separation recovery rate is improved.

The present invention belongs to the field of flotation, and specifically relates to a collector for flotation of ilmenite, comprising a collector a having a structure of formula 1#imgabs0#, and / or a collector b having a structure of formula 2#imgabs1#; wherein R1 is C1~C 10 Alkyl, R2 is H, C1~C 10 Said R3 is C1~C 10 The alkyl group; the M a 、M b solely H, Na, K, or NH4. The present invention employs the collector a and / or collector b as collectors for ilmenite, exhibiting excellent capture selectivity and capable of efficiently and selectively targeting titanium in the ilmenite, thereby improving its capture capacity and selectivity. Furthermore, the collectors of the present invention are surprisingly well-suited to the flotation requirements of fine-grained ilmenite, achieving excellent titanium capture capacity and selectivity during the flotation of fine-grained ilmenite.

The invention provides an alkyl ether hydroxamic acid collecting agent and a preparation method and application thereof, and belongs to the technical field of flotation beneficiation. The alkyl ether hydroxamic acid collecting agent is prepared through a hydroxylamine method, namely, alkyl ether acetic acid and methyl alcohol are subjected to an esterification reaction firstly, then hydroxylamine and alkali are subjected to a hydroximation reaction, and a final product is obtained. On the basis of a traditional hydroximic acid collecting agent, an alkyl ether functional group is introduced to enhance the selectivity, and the alkyl ether functional group and a hydroxime group in a molecular structure have a synergistic effect, so that the collecting performance and the selectivity are further improved. The alkyl ether hydroxamic acid collecting agent prepared through the method can be applied to the field of flotation of various minerals such as rare earth ore, tungsten ore, cassiterite, apatite, malachite and ilmenite. In addition, the collecting agent can reduce the use amount of flotation reagents, and has important significance in mineral flotation operation.