133 results about "Titanomagnetite" patented technology

The invention belongs to the technical field of steel smelting, and particularly discloses a comprehensive utilization method of vanadium titano-magnetite, which comprises the following steps: S1, preparing the vanadium titano-magnetite into pellets, and carrying out reduction reaction to obtain direct reduced iron; s2, a carbonaceous reducing agent and the direct reduced iron obtained in the step S1 are mixed and smelted in a melt separation electric furnace, and slag and molten iron are obtained; a slag former is not added in the smelting process, the purity of the titanium slag is improved through optimal design of the furnace profile of the melting electric furnace and combination of various smelting process control means, the problems that refractory materials of the melting electric furnace are excessively eroded, the service life is short, slag-metal separation is difficult, smelting is difficult to control and the like are solved, and the purposes of high-grade titanium slag and long service life of the melting electric furnace are achieved.

The invention discloses a pre-concentration and tailing discarding process for vanadium titano-magnetite, and relates to the technical field of vanadium titano-magnetite beneficiation, and the pre-concentration and tailing discarding process comprises the following steps: raw ore is subjected to crushing operation to obtain a crushed product, and the crushed product is fed into high-pressure roller grinding operation to obtain a high-pressure roller grinding product; the high-pressure roller-milled product is subjected to screening operation, and an oversize product with the large particle size and an undersize product with the small particle size are obtained; the undersize products are subjected to first weak magnetic pre-concentration operation, tailings obtained through the first weak magnetic pre-concentration operation are subjected to first strong magnetic pre-concentration operation, concentrate obtained through the first weak magnetic pre-concentration operation and concentrate obtained through the first strong magnetic pre-concentration operation are combined into final pre-concentration concentrate, and the tailings obtained through the first strong magnetic pre-concentration operation serve as one part of final tailings; the oversize products are subjected to second weak magnetic pre-concentration operation, tailings obtained through the second weak magnetic pre-concentration operation are subjected to second strong magnetic pre-concentration operation, and concentrate obtained through the second weak magnetic pre-concentration operation and concentrate obtained through the second strong magnetic pre-concentration operation are combined and then returned to the high-pressure roller grinding operation; tailings obtained by the second strong magnetic pre-separation operation are used as one part of final tailings. According to the method, crushing, high-pressure roller grinding and screening are adopted, oversize and undersize products obtained through screening are subjected to magnetic separation, pre-concentration and tailing discarding, oversize product pre-concentration concentrate is returned to the high-pressure roller grinding, the subsequent ore grinding and selecting cost is effectively reduced, the iron and titanium grades of subsequent ore entering the grinding process are improved, the load capacity of the high-pressure roller grinding machine can be reduced, and energy consumption and production cost are reduced.

The invention provides a method for enriching vanadium and titanium slag through hydrogen-based shaft furnace hydrogen-rich gas reduction-electric furnace melt separation regulation and control of vanadium titano-magnetite. According to the method, the metallization rate of metallized pellets is larger than or equal to 90% and the residual carbon content is 1t through H2-rich reduction (high H2 concentration and staged temperature control); 0.5%; caO and MgO are added in the melting and grading stage to regulate and control slag phase composition, and high-grade vanadium-titanium slag with TiO2 larger than or equal to 45% and V2O5 larger than or equal to 2.3% and low-carbon molten iron are obtained. The high-efficiency separation and carbon footprint of iron, vanadium and titanium in the vanadium titano-magnetite is reduced by more than 50% compared with a traditional process, high-quality raw materials are provided for titanium dioxide and vanadium extraction, and the method has the advantages of high efficiency, cleanness and low consumption.

The invention belongs to the field of metallurgy, and particularly relates to a method for comprehensively recovering iron, vanadium, titanium, scandium and gallium through cooperation of vanadium titano-magnetite and red mud, which comprises the following steps: a) mixing vanadium titano-magnetite concentrate powder and red mud powder, roasting, leaching in water, and carrying out solid-liquid separation to obtain leached residues and leached liquid; b) mixing the leachate with a precipitant to precipitate vanadium, and carrying out solid-liquid separation to obtain vanadium-rich slag and vanadium-precipitated clear liquid; dissolving the vanadium-rich slag in a sulfuric acid solution, mixing the vanadium-rich slag with ammonium salt to react, carrying out solid-liquid separation, and roasting the obtained solid product ammonium polyvanadate to obtain V2O5; resin is used for adsorbing and desorbing gallium ions in the vanadium precipitation clear liquid, the pH of desorption liquid is adjusted to be alkaline, then electrolysis is conducted, and crude gallium is obtained; c) washing and drying the leaching residues to prepare pellets; after the pellets are pre-reduced, a carbonaceous reducing agent is mixed, melt separation treatment is carried out, and scandium-containing high-titanium slag and molten iron are obtained; and Ti and Sc in the scandium-containing high titanium slag are recycled. The method has the advantages of simple process, cleanness, high efficiency and the like.

The invention belongs to the technical field of pyrometallurgy and hydrometallurgy, and discloses an efficient leaching method for Joule thermal shock strengthened vanadium titano-magnetite. The Joule thermal shock strengthened vanadium-titanium resource efficient leaching comprises the steps that low-grade vanadium-titanium magnetite ore powder and a carbon source are mixed and then subjected to Joule thermal shock activation treatment, and an obtained activation product is leached through dilute acid or organic acid, so that valuable metal such as vanadium, titanium and iron can be efficiently leached out. Vanadium titano-magnetite and a small amount of carbon powder are subjected to Joule thermal shock, so that the valence state of metal ions is reduced, and the leaching activity of metal is improved. The Joule thermal shock strengthening low-grade vanadium titano-magnetite acid leaching method has the advantages of being high in activation efficiency, high in metal element leaching efficiency and the like.

The invention relates to the technical field of ferrous metallurgy, in particular to an evaluation method of a process for deep reduction smelting of vanadium titano-magnetite metallized pellets in an electric furnace, the slag iron quality and the process are graded through the recovery rate of valuable elements, meanwhile, the economic score of the process is calculated through the components and temperature of molten iron, the calculation is simple, and the method is easy to implement. The evaluation indexes are simple and rapid, the quality level of melt separation slag and vanadium-containing molten iron obtained after deep reduction of the vanadium titano-magnetite metallized pellet electric furnace, the technical level of the deep reduction technology and the economical efficiency level of the technology can be clearly and objectively evaluated, and a user can comprehensively evaluate the technical level and the economical efficiency of the technology. And a certain item can be evaluated independently, and the method can be used flexibly according to actual conditions. The evaluation method comprehensively considers the influence of factors such as carbon, sulfur, phosphorus, vanadium and temperature of the molten iron, can more comprehensively and objectively evaluate the deep reduction melt vanadium-containing molten iron, and has good innovativeness and practicability.

The invention relates to a method for separating iron, vanadium and titanium dioxide in vanadium titano-magnetite or titanium concentrate through a wet method, and belongs to the technical field of chemical engineering. The method comprises the following steps: (a) mixing vanadium titano-magnetite or titanium concentrate with sulfuric acid with the concentration of 22-30wt.% to obtain mixed slurry; (b) treating the mixed slurry at 150-200 DEG C and 2-4 MPa under the condition that the Reynolds number is gt; reacting in a turbulent flow state of 4000, so that non-titanium elements are dissolved to generate sulfate; (c) carrying out solid-liquid separation on the reaction product in the step (b) to obtain a high-grade titanium-rich material and waste liquid; (d) the titanium-rich material reacts with a sodium hydroxide solution, silicon in the titanium-rich material is removed, and a sodium silicate solution is generated; and (e) reacting the silicon-removed titanium-rich material with a hydrochloric acid solution with the mass concentration of less than 15%, cleaning, carrying out solid-liquid separation, and calcining to obtain anatase or rutile titanium dioxide. According to the method, all iron, vanadium and titanium elements in the vanadium-titanium-iron concentrate and the titanium concentrate are recycled.

The invention discloses a method for recleaning titanium concentrate from vanadium titano-magnetite titanium separation tailings and the obtained titanium concentrate, and belongs to the technical field of tailings recovery. The method comprises the following specific processes: (1) carrying out first-stage weak magnetic iron removal treatment on titanium separation tailing pulp, and then carrying out strong magnetic treatment; (2) tailings obtained through strong magnetic treatment are screened, then are ground, and then are subjected to second-stage weak magnetic iron removal treatment; (3) after the second-stage weak magnetic iron removal treatment, performing first-stage gravity separation treatment to obtain first-stage gravity separation concentrate and first-stage gravity separation tailings, performing second-stage gravity separation treatment on the first-stage gravity separation tailings to obtain second-stage gravity separation concentrate, and combining the first-stage gravity separation concentrate with the second-stage gravity separation concentrate to obtain a floating material; and (4) carrying out desulfurization and titanium flotation treatment on the flotation material obtained in the step (3) to obtain titanium concentrate. According to the method, high-grade and high-yield titanium concentrate is finally obtained through first-stage weak magnetic treatment, strong magnetic treatment, second-stage weak magnetic treatment, first-stage reselection, second-stage reselection, desulfurization and titanium flotation treatment.

The invention discloses a method for extracting iron and reducing impurities from vanadium-titanium-iron concentrate, and belongs to the technical field of mineral separation. In order to achieve the purpose of extracting iron and reducing impurities from vanadium-titanium-iron concentrate, the invention provides a method for extracting iron and reducing impurities from vanadium-titanium-iron concentrate. The vanadium-titanium-iron ore concentrate is subjected to iron extraction and impurity reduction treatment through the processes of demagnetizing, screening and grading, coarse grain closed-circuit tower grinding and magnetic separation, fine grain direct magnetic separation, coarse grain and fine grain magnetic separation concentrate mixing demagnetizing closed-circuit sand grinding and magnetic separation, magnetic separation concentrate reverse flotation and magnetic separation flotation tailing mixing magnetic separation scavenging. And reverse flotation is optimized, the content of intergrowth of titanomagnetite and gangue minerals in the concentrate is reduced, the high-grade vanadium-titanium-iron concentrate with the TFe increasing amplitude being large is obtained, the TFe grade is increased to 58.12%-61.12%, and the increasing amplitude reaches 4.63%-5.07%.

The invention discloses a magnetic separation, enrichment and recovery process for low-grade vanadium titano-magnetite, which belongs to the technical field of comprehensive utilization of vanadium titano-magnetite, adopts a combined mineral separation process of dry pre-enrichment and tailing discarding, wet grinding, concentration and refinement, combination of gravity and magnetism and middling retreatment, selects mature industrial equipment and optimizes the combination. High-efficiency dry pre-selection equipment, wet grinding equipment, a multi-section reselection and middling retreatment system and solid-liquid separation equipment are utilized, a large amount of tailings are discarded at the front end of a mine, iron and titanium are efficiently separated and comprehensively recycled in the middle main process, the recycling rate bottleneck is broken through through the middling retreatment technology, near-zero discharge of wastewater is achieved, and compared with a conventional process, water can be saved by 50-60%, and the economic benefit is high. According to the method, the grinding and separation cost is saved by 60-70%, the energy-saving effect is remarkable, the purposes of cost reduction, efficiency improvement, comprehensive utilization of resources and clean production are achieved, the production and technical problems of low-grade vanadium titano-magnetite mine enterprises in arid and water-deficient areas are effectively solved, and the method is suitable for large-scale production and application.

The invention relates to the technical field of comprehensive utilization of vanadium titano-magnetite resources, in particular to a flotation combined reagent and a flotation method for vanadium titano-magnetite associated ultralow-grade cobalt-nickel ore. The flotation combined reagent comprises a copper ammonia compound activating agent composed of copper sulfate, ammonium carbonate and sodium citrate, a compound inhibitor composed of sodium humate, tannic acid and sodium tripolyphosphate, a main collecting agent butyl xanthate, an auxiliary collecting agent alkyl hydroxamic acid and a foaming agent diethylene glycol monobutyl ether. According to the method, a technical system of bulk flotation process-novel collaborative reagent system is constructed, so that the technical problem of recycling associated ultralow-grade cobalt and nickel resources in the vanadium titano-magnetite iron separation tailings is successfully solved, the problem of low separation efficiency of ultralow-grade minerals is effectively solved, a complete and efficient technical scheme is formed, and the method is suitable for industrial production. And an innovative technical path is provided for comprehensive recovery of associated cobalt and nickel resources of the vanadium titano-magnetite.

The invention provides an efficient recovery method for vanadium titano-magnetite upgrading tailings, and belongs to the technical field of mineral separation. The method comprises the following steps: carrying out low-intensity magnetic separation, ball-milling crushing and two-stage low-intensity magnetic separation on the vanadium titano-magnetite upgrading tailings to obtain iron ore concentrate and low-intensity magnetic tailings; and then strong magnetic separation, flotation desulfurization and titanium roughing are conducted on weak magnetic tailings, and finally three times of flotation concentration are conducted to obtain titanium concentrate. And the recovery rate of iron and titanium in the vanadium titano-magnetite upgrading tailings is increased.

The invention provides a coal-based reduction-melt separation-electric furnace re-reduction-converter blowing smelting method, and belongs to the technical field of comprehensive utilization of vanadium titano-magnetite. According to the method, iron, titanium and vanadium resources in the vanadium titano-magnetite are recycled in a stepped manner by adopting a method of coal-based direct reduction, primary melt separation, secondary melt separation and converter blowing smelting of the vanadium titano-magnetite. And low-carbon molten steel, semi-steel, vanadium slag and high-titanium slag are prepared respectively, and high-valued utilization of iron, vanadium and titanium in the vanadium titano-magnetite is achieved. Due to the fact that hot charging enters the electric furnace, electric furnace melting separation power consumption can be reduced, in the second melting separation process, petroleum coke and titanium ore are added into the ferrovanadium titanium slag for secondary deep selective reduction, separation can be effectively carried out, and therefore qualified products are produced.

The invention provides a smelting method of vanadium titano-magnetite and application of the vanadium titano-magnetite. The smelting method comprises the following steps that after a mixed material of vanadium titano-magnetite, pulverized coal and a solvent is subjected to a reduction reaction in a coke oven, the obtained material is subjected to melt separation treatment in an electric furnace, and melt separation slag iron is obtained. The smelting method adopts a new process of coke oven reduction-electric furnace melting separation, compared with a process using hydrogen as a reducing agent, the process has the advantage of low cost of the reducing agent (pulverized coal), the reduced metallized pellets contain carbon and can be subjected to slag pre-adjustment, the electric furnace burden is single burden, and the cost is low. And the problems of large continuous production difficulty and the like caused by raw material fluctuation and excessive raw materials fed into the furnace to electric furnace reduction can be effectively prevented.

The invention provides a vanadium titano-magnetite beneficiation method which comprises the following steps: carrying out dry screening after carrying out coarse crushing and medium crushing on vanadium titano-magnetite raw ore, and carrying out dry tailing discarding on dry screening undersize; carrying out ultrafine crushing on the concentrate subjected to dry type tailing discarding, and carrying out weak magnetic pre-concentration roughing and weak magnetic pre-concentration scavenging on the screen underflow; weak magnetic pre-separation roughing concentrate and weak magnetic pre-separation scavenging concentrate are combined and then subjected to first-stage grinding, and classified undersize products are subjected to first-stage weak magnetic roughing and first-stage weak magnetic scavenging; first-stage weak magnetic roughing concentrate and first-stage weak magnetic scavenging concentrate are combined and then enter second-stage ore grinding, and after screening, undersize products are subjected to second-stage weak magnetic roughing and second-stage weak magnetic scavenging; the second-section weak magnetic roughing concentrate and the second-section weak magnetic scavenging concentrate are combined and then subjected to third-section ore grinding, then quality-improving and impurity-reducing magnetic separation is conducted, the quality-improving and impurity-reducing magnetic separation concentrate is concentrated and filtered to obtain superfine iron ore concentrate, and the quality-improving and impurity-reducing magnetic separation tailings are treated to obtain superfine titanium concentrate; the method provided by the invention can realize comprehensive utilization of iron and titanium resources.

Nanoflocculants are provided that are comprised of nanoparticles of titanomagnetite having anionic surface moieties associated with electrostatically bound polymerized chains of cationic polyacrylamide, further comprising lauryl sulfate moieties adsorbed to the surface of nanoparticles of the titanomagnetite nanoparticles and / or adsorbed to the bound cationic polyacrylamide polymers. These nanoflocculants combine the dual functionalities of the polyacrylamide / lauryl sulfate moieties, as well as the surface activity of titanomagnetite nanomaterials. Process are provided for making and using the disclosed nanoflocculants, including uses for flocculating intimate aqueous dispersions of solids and bitumen.

The invention discloses a comprehensive recovery method for valuable elements in vanadium titano-magnetite tailings, which comprises the following steps of: (1) dehydrating and concentrating the vanadium titano-magnetite tailings, settling sand, grading and grinding to obtain undersize minerals; (2) the undersize minerals are subjected to concentration dehydration and strong magnetic iron removal and titanium collection, and strong magnetic concentrate, strong magnetic tailings and concentrated overflow are obtained; (3) the strong magnetic concentrate obtained in the step (2) is subjected to gravity roughing, scavenging and concentration, and titanium fine powder is obtained; and (4) carrying out inclined plate desliming concentration on the strong magnetic tailings obtained in the step (2), adding an inhibitor and a collecting agent, and then carrying out flotation roughing, concentration and scavenging to finally obtain phosphorus concentrate powder. According to the method, effective separation of useful minerals and gangue can be ensured, the recovery rate of titanium and phosphorus is increased, the flotation effect is prevented from being affected by over-grinding caused by monomer phosphorus, the phosphorus grade before flotation is greatly improved, the treatment amount of flotation pulp is reduced, the process is simple and easy to implement, and comprehensive and efficient recycling of titanium and phosphorus elements is achieved.

This invention discloses a process for the co-extraction of vanadium from vanadium-titanium magnetite and vanadium shale coal. The process employs a side-blown furnace, with a clarification and vanadium blowing device connected to the end of the furnace via a chute. The side-blown furnace has a feed inlet at the top of its first end and a flue at the top of its last end. Multiple straight nozzles are installed on both sides of the furnace. The process includes the following steps: S1, uniformly mixing vanadium-titanium magnetite and vanadium shale coal in a specific ratio; S2, adding the mixed mineral material through the feed inlet of the side-blown furnace, and injecting pulverized coal and oxygen-enriched feed into the furnace through the straight nozzles. High-temperature smelting is carried out using air and natural gas; S3, after the smelting reaction is completed, the melt is discharged into the sluice box through the side-blown furnace outlet and then into the clarification and blowing vanadium device; the side-blown furnace of this application suppresses the generation of by-products such as TiC during the smelting process by injecting natural gas, so that the metal reduction reaction can be fully carried out, realizing the continuous melting and metal reduction process of mixed vanadium-titanium magnetite and shale coal vanadium ore, breaking the defects of traditional multi-process step-by-step processing, shortening the blast furnace and non-blast furnace smelting process, and reducing equipment investment, operating costs and environmental impact.

The invention relates to the technical field of blast furnace smelting, and discloses a method for improving the flowability of high titanium slag in blast furnace smelting of vanadium titano-magnetite, and the method comprises the following steps: stabilizing a furnace charge structure of 48wt% of vanadium-titanium sintered ore, 48wt% of vanadium-titanium pellet ore and 4wt% of vanadium-titanium magnetite raw ore, smelting in the furnace, and adding 2-5wt% of dolomite and a proper amount of manganese powder into the vanadium-titanium sintered ore to improve the flowability of the slag. More preferably, the flowability of the high titanium slag is further improved by combining optimization of operation parameters such as large air volume, high air temperature, high oxygen enrichment rate and high top pressure of the blast furnace. According to the method for improving the flowability of the high-titanium slag, on the premise that the charging proportion of schreyerite is not reduced, generation of a high-melting-point phase in the slag can be effectively controlled, the viscosity of the slag is reduced, the flowability of the slag is improved, the smelting efficiency of a blast furnace is improved, and the production cost is reduced.

Nanoflocculants are provided that are comprised of nanoparticles of titanomagnetite having anionic surface moieties associated with electrostatically bound polymerized chains of cationic polyacrylamide, further comprising lauryl sulfate moieties adsorbed to the surface of nanoparticles of the titanomagnetite nanoparticles and / or adsorbed to the bound cationic polyacrylamide polymers. These nanoflocculants combine the dual functionalities of the polyacrylamide / lauryl sulfate moieties, as well as the surface activity of titanomagnetite nanomaterials. Process are provided for making and using the disclosed nanoflocculants, including uses for flocculating intimate aqueous dispersions of solids and bitumen.

The application discloses a smelting method of vanadium-titanium magnetite, belongs to the technical field of comprehensive utilization of vanadium-titanium magnetite, and solves the problems of low iron utilization value, low vanadium recovery rate and difficulty in recovery and utilization of titanium in the prior art. The method comprises the following steps: vertical furnace gas-based direct reduction of vanadium-titanium magnetite oxidized pellets and reducing gas to obtain metallized pellets; the metallized pellets are loaded into an electric furnace, one-time melting separation is carried out under the condition that no reducing agent is added, low-carbon molten steel and iron-vanadium-titanium slag are generated; the iron-vanadium-titanium slag is mixed with coke and loaded into the electric furnace, secondary melting separation is carried out, and silicon-vanadium alloy and titanium-rich slag are generated. The application can be used for smelting of vanadium-titanium magnetite.

The invention provides a low-iron-loss blast furnace smelting method, which relates to the technical field of vanadium titano-magnetite smelting, and comprises the following steps: S1, adding raw materials with a specified furnace charge structure into a blast furnace for material distribution, and starting smelting; s2, after the furnace condition of the blast furnace is stable, the furnace inlet air volume is adjusted to be within the preset air volume range, and meanwhile the oxygen enrichment rate is adjusted to be within the preset oxygen enrichment rate range; s3, the smelting air temperature is adjusted to a preset temperature range, the coke ratio is controlled to be a preset coke ratio, the coal ratio is controlled to be a preset coal ratio range, and the content of silicon and titanium is controlled to be within a preset first value range; and S4, smelting is stopped after continuous smelting is conducted for a preset time length. By optimizing the smelting method, the blast capacity in the furnace is increased, the charging system and the air supply system are optimized, the airflow is stabilized, and the coal gas distribution is improved; the furnace temperature is reasonably controlled, the coke ratio is reduced, the iron loss is reduced, and the problem that the iron loss is high in an existing blast furnace vanadium titano-magnetite smelting method is solved.

The present application relates to the field of blast furnace smelting technology, and proposes a vanadium-titanium magnetite blast furnace smelting method, which comprises: adjusting the burden structure and the ore grade in the blast furnace smelting process to obtain a slag with a mass content of TiO2 of 23.5-24.5%, and produce molten iron and pig iron; controlling the mass content of MgO in the slag to be 7-9%, the mass content of Al2O3 to be 13.5-15%, the slag basicity R2 to be 1.06-1.10 times, and R3 to be 1.38-1.42 times to optimize the fluidity of the slag; controlling the oxygen enrichment rate of the blast furnace to be 4.0-6.0% to make the mass content of Ti(CN) in the slag less than 0.5% and reduce the deterioration of the fluidity of the slag; and controlling the temperature of the molten iron to be 1430-1460 DEG C to make the mass content of titanium in the pig iron be 0.18-0.28% to optimize the separation of slag and iron. The present application realizes that the blast furnace can maintain stable and efficient smelting when the mass content of TiO2 in the slag is 23.5-24.5%.

The invention relates to the technical field of iron ore beneficiation, and discloses a vanadium titano-magnetite crushing and grinding method which comprises the following steps: crushing and screening vanadium titano-magnetite to obtain a coarse particle material with predetermined granularity; the coarse particle materials are crushed, water is added into the crushed materials for size mixing, first wet screening is conducted, and first oversize materials and first undersize materials are obtained; carrying out ore grinding on the first undersize material, and then carrying out second wet screening to obtain a second oversize material and a second undersize material; the first oversize material and the second oversize material are mixed and then fed into a second high-pressure roller mill to be crushed, the crushed materials are subjected to third wet screening, the third oversize material returns to the second high-pressure roller mill to be crushed again, the third undersize material is merged into the ball mill to be finely ground and screened, and the second undersize material is the finely ground material with the qualified particle size. According to the method, by optimizing a crushing and ore grinding cooperation mechanism, the overall energy efficiency and treatment capacity of the system are improved, and the investment and operation cost is reduced.

The invention discloses a blast furnace smelting method for schreyerite with a low magnesium-aluminum ratio, relates to the technical field of blast furnace smelting in the technical field of schreyerite, and solves the problems that an existing blast furnace vanadium titano-magnetite smelting method is not suitable for smelting under the condition of the low magnesium-aluminum ratio and the smelting effect is poor. Slag components are accurately regulated and controlled; furnace temperature is controlled, and the molten iron temperature is controlled within a first preset parameter; air supply is controlled; and controlling the coke quality and smelting to obtain a finished product. By adjusting crude fuel, slag is accurately regulated and controlled, and slagging, the molten iron temperature, the air supply system and the coke quality are adjusted; the method is suitable for a schreyerite blast furnace smelting method under the condition of low magnesium-aluminum ratio, the slag performance is excellent, and the desulfurization effect is good. And the generation of high-melting-point minerals in the furnace slag is greatly reduced by precisely regulating and controlling the components of the furnace slag, especially the cooperative regulation and control of low magnesium-aluminum ratio and binary alkalinity. And the slag fluidity is greatly improved, slag-iron separation is smooth, and the production efficiency of the blast furnace is improved.

The invention discloses a comprehensive utilization method of vanadium titano-magnetite tailings, and belongs to the technical field of mineral separation. In order to achieve comprehensive utilization of iron and titanium in magnetic vanadium titano-magnetite tailings, the comprehensive utilization method for the vanadium titano-magnetite tailings comprises the steps that the vanadium titano-magnetite tailings are subjected to low-intensity magnetic separation I, and low-intensity magnetic concentrate I and low-intensity magnetic tailings I are obtained; after the weak magnetic concentrate I is subjected to ball milling, weak magnetic separation II is conducted, and iron concentrate and weak magnetic tailings II are obtained; the weak magnetic tailings II are combined to overflow for flotation I; the weak magnetic tailings I are subjected to strong magnetic separation, and strong magnetic concentrates and strong magnetic tailings are obtained; performing cyclone classification on the strong magnetic concentrate to obtain overflow and settled sand, and performing flotation I and flotation II on the overflow and the settled sand respectively to obtain titanium concentrate I and titanium concentrate II. The vanadium titano-magnetite tailings are subjected to graded flotation, iron ore concentrate with the TFe grade being larger than or equal to 58% and titanium concentrate with the TiO2 grade being 42% or above and titanium concentrate with the TiO2 grade being 47% or above can be obtained, and comprehensive utilization of the vanadium titano-magnetite tailings is achieved.

The invention discloses a vanadium titano-magnetite floating phosphorus inhibitor and application thereof, and relates to the technical field of mineral processing. The floating phosphorus inhibitor comprises the following components in percentage by mass: 30%-50% of low-polymerization-degree polysaccharide, 30%-50% of high-polymerization-degree polysaccharide and 0%-40% of an organic dispersing agent. Gangue minerals can be accurately inhibited through good selectivity and stability, and flotation of phosphorite is not affected; and the method is environment-friendly, does not pollute the environment, meets the current requirements on green and environment-friendly production, and is beneficial to promoting the sustainable development of the mining industry. The grade of raw ore P2O5 is 3% or below, phosphorus resources in the vanadium titano-magnetite tailings can be effectively recycled, and the comprehensive utilization rate of the resources is increased; meanwhile, the production cost is effectively reduced, and good economic benefits and social benefits are achieved. In addition, the preparation method of the inhibitor is simple, convenient and feasible, and is convenient to popularize and use in actual production.

The invention discloses an iron separation and titanium separation method for high-iron vanadium titano-magnetite, and belongs to the field of vanadium titano-magnetite separation. The method comprises the following steps that after raw ore is crushed, ore grinding is conducted, iron ore concentrate 1 is recycled through low intensity magnetic separation, and tailings are subjected to two-section gradient high intensity magnetic separation to enrich titanium minerals; the strong magnetic concentrate is subjected to flotation to obtain titanium concentrate 1, middlings are reground and then subjected to low intensity magnetic separation to recover iron concentrate 2, tailings are subjected to three-stage strong magnetic separation and two-stage flotation to obtain titanium concentrate 2, and dilute sulphuric acid, sodium oleate and an inhibitor are adopted in flotation to cooperatively regulate and control the ore pulp environment. According to the method, excessive grinding is reduced through stage grinding, the quality of flotation raw materials is stabilized through gradient magnetic separation, the titanium recovery rate is optimized through the flotation technology, efficient separation of the iron ore concentrate and the titanium concentrate is achieved, the problems that iron and titanium of the high-iron type vanadium titano-magnetite are uneven in dissemination and low in separation efficiency are solved, and the method has the advantages of being high in resource utilization rate and stable in concentrate quality.

The invention relates to a method for leaching and separating valuable metals at normal temperature and pressure by wet-ground activated hydrochloric acid, and belongs to the field of vanadium-titanium-iron concentrate treatment. The method comprises the following steps: S1, preparing a vanadium titano-magnetite concentrate sample; s2, the sample is subjected to wet grinding activation, and an ore grinding auxiliary is added; s3, a hydrochloric acid solution is adopted as a leaching agent, the sample obtained after wet grinding is mixed with the hydrochloric acid solution, and stirring leaching is conducted at the normal temperature and the normal pressure; and S4, after leaching is finished, solid-liquid separation is carried out to obtain leaching residues and leaching liquid, and the leaching rate is calculated. According to the method, the ore grinding aid is added under the normal-temperature and normal-pressure conditions to assist hydrochloric acid in selective leaching and separate iron, vanadium and titanium, so that the production cost is reduced, the environmental pollution is reduced, and meanwhile, the leaching rate is increased. The problem that iron, titanium and vanadium cannot be directly leached and separated from vanadium titano-magnetite iron concentrate hydrochloric acid at normal temperature and normal pressure in the prior art is solved.

The invention discloses a high-vanadium-titanium high-pellet-ratio blast furnace burden structure and a smelting method thereof, relates to the technical field of blast furnace smelting, and solves the problems that in an existing blast furnace vanadium-titanium magnetite smelting method, the pellet proportion in a blast furnace burden structure is low, and the blast furnace burden structure is poor. The furnace charge structurally comprises the following components in percentage by weight: 46-48% of vanadium-titanium sintered ore, 2.5-3.5% of raw ore and 49-51% of vanadium-titanium pellets. The smelting method comprises the following steps that S1, raw materials of a furnace charge structure are added into a blast furnace for material distribution; and S2, the smelting air temperature is adjusted to the preset temperature, the blast furnace air inlet amount is adjusted to be the preset air amount, the oxygen enrichment rate is adjusted to be the preset oxygen enrichment rate, and a finished product is obtained through smelting. By optimizing the furnace burden structure and the smelting method, the proportion of pellets in the furnace burden structure is increased, meanwhile, the quality of finished products is improved, and the blast furnace burden structure with the high vanadium-titanium and high pellet ratio and the smelting method of the blast furnace burden structure are achieved.