196 results about "Titanium slag" patented technology

The invention discloses a direct-current hollow electrode hydrogen plasma furnace mineral powder smelting system and method and application, and belongs to the technical field of hydrogen metallurgy. The system comprises a hollow electrode gas powder injection hydrogen plasma gun system, a direct current bottom electrode ore-smelting electric furnace system, a fine ore and hydrogen supply system and the like. The hollow electrode and the furnace bottom electrode form a direct-current arc, hydrogen carrying mineral powder is sprayed into an arc area to generate high-temperature hydrogen plasma, mineral powder reduction is achieved, and metal and slag are separated. According to the method, hydrogen serves as a reducing agent, carbon emission is reduced, the reaction efficiency is high, energy consumption is low, and the method can be used for steelmaking, smelting of micro-carbon ferromanganese and titanium slag and recovery of valuable metal in nonferrous smelting waste slag and has good green metallurgy application prospects.

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 provides titanium-containing anhydrous stemming for a blast furnace and a preparation method of the titanium-containing anhydrous stemming, and belongs to the technical field of refractory materials for the blast furnace. The titanium-containing anhydrous stemming for the blast furnace comprises the following raw materials: 40-60 parts of titanium corundum, 5-15 parts of silicon carbide, 10-20 parts of ferro-silicon nitride fine powder, 5-15 parts of titanium dioxide fine powder, 5-15 parts of vanadium-titanium slag fine powder, 5-10 parts of coke fine powder, 1-5 parts of monatomic silicon fine powder, 1-5 parts of ball clay micro powder, 1-5 parts of aluminum nitrate micro powder and 1-2 parts of magnesium alon micro powder. Gas-phase substances of Si (g), Al (g) and Mg (g) can be formed in the stemming at high temperature by the monatomic silicon fine powder and the MgAlON micro powder in the raw materials and react with CO and N2 in the environment to generate ceramic whiskers such as SiC, Si3N4, AlN and MgAl2O4, and the generated ceramic whiskers are distributed in a staggered manner and are filled in pores of the stemming, so that the high-temperature strength and the volume stability of the stemming are remarkably improved.

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 discloses a method for preparing titanium tetrachloride through gas-based reduction carbonization and fused salt chlorination of melt separation titanium slag. The method comprises the steps that titanium slag obtained through hydrogen reduction and electric furnace melt separation of vanadium-titanium magnetite concentrate is ground to a certain particle size; the titanium slag obtained in the first step is placed in a tubular furnace, the temperature is increased to 1100-1300 DEG C, meanwhile, mixed gas of methane and hydrogen is introduced for a reaction, and a carbonized product is obtained; and mixing the carbonized product obtained in the second step with chlorine salt, and carrying out chlorination reaction at a certain temperature to produce crude titanium tetrachloride. According to the method, gas-based reduction and carbonization of the melt separation titanium slag are achieved, compared with a traditional high-temperature carbonization process, the reaction temperature is greatly reduced, the carbonization rate is remarkably increased, and a new thought is provided for comprehensive utilization of the melt separation titanium slag.

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 relates to the technical field of preparation of a clear titanium solution, and provides a method for preparing a clear titanium solution through mixing and continuous acidolysis of acid-soluble titanium slag and titanium concentrate, which comprises the following steps: respectively grinding and screening the titanium concentrate and the acid-soluble titanium slag to obtain titanium concentrate powder and acid-soluble titanium slag powder; mixing the two materials, and premixing with concentrated sulfuric acid; firstly adding an initiator into a continuous acidolysis reactor, then transferring the premixed raw materials into the continuous acidolysis reactor, and continuously adding the initiator to obtain a solid-phase substance; adding an initiator into the dissolving tank, and transferring a solid-phase substance generated by the acidolysis reaction into the dissolving tank for leaching, so as to obtain a leached titaniferous solution; the obtained leached titaniferous solution is sent to a reaction tank, compressed air is introduced, after cooling, the materials are discharged to a settling tank, a flocculating agent is added, and a clear titaniferous solution is obtained; according to the method, the combination degree of the acid-soluble titanium slag and the titanium concentrate in the system can be improved, the mixed reaction is realized in one step by utilizing a continuous acidolysis reaction process, the process is simple, the production index is stable, and the production efficiency is high.

The invention relates to the technical field of titanium slag smelting equipment, in particular to a large titanium slag smelting fully-closed direct current electric furnace gas generator tail gas waste heat utilization system which comprises an SCR denitration device, one end of the SCR denitration device is connected with a tail gas gathering pipe, electric furnace gas generator tail gas is led into the tail gas gathering pipe, and the tail gas gathering pipe is connected with a tail gas waste heat utilization device. The outer side of the end, close to the tail gas gathering pipe, of the SCR denitration device is connected with an ammonia spraying pipe, the end, away from the tail gas gathering pipe, of the SCR denitration device is connected with two branch pipelines, the outer end of one branch pipeline is connected to a raw material drying fluidized bed furnace, and the outer end of the other branch pipeline is connected to a titanium slag finished product bin; and the exhaust ends of the raw material drying fluidized bed furnace and the titanium slag finished product bin are connected to a dust collecting device through pipelines. According to the tail gas waste heat utilization system for the large titanium slag smelting fully-closed direct-current electric furnace gas generator, nitric oxide in tail gas of the fully-closed direct-current electric furnace gas generator is efficiently treated through the SCR denitration device.

The invention discloses a melt separation titanium slag modification treatment method and system. The method comprises the steps that in the direct reduction-melt separation process, melt separation titanium slag components are regulated and controlled to enable the melt separation titanium slag to contain 40 wt%-60 wt% of TiO2 and 1.1 wt%-9 wt% of C, deslagging is conducted, after heat preservation melting is conducted on the melt separation titanium slag at the temperature of 1550-1600 DEG C for 30-60 minutes, slow cooling is conducted to 1200 DEG C at the cooling rate of 5-10 DEG C / min, then rapid cooling is conducted to 900 DEG C at the cooling rate of 20 DEG C / min or above, finally natural cooling is conducted to the room temperature, and modified slag is obtained. According to the method, regulation and control of components of the melt-separated titanium slag are combined with heat preservation, slow cooling, quenching and natural cooling, anosovite is directionally induced to serve as a main phase of the titanium slag, micronized spinel and an amorphous glass phase, titanium resources are enriched in the anosovite phase, and the modified titanium slag high in grade and good in activity is obtained; and the problems of low additional value, small utilization scale, poor economic benefit and the like of molten titanium slag products are solved.

The application discloses a threaded hole machining method for a titanium rod, the threaded hole is arranged on a working section of the titanium rod, and the working section is made of titanium alloy material; the threaded hole machining method comprises the following steps: S1, a tungsten steel drill bit is selected to process a bottom hole with a preset size at one end of a workpiece to be machined; S2, a boring tool is used to bore the bottom hole to empty titanium slag debris in the bottom hole; S3, after the titanium slag debris in the bottom hole is emptied, a tapping tap is used to tap the bottom hole to form a threaded hole; wherein the tapping tap has a 30-35 degree rake angle and a 40 degree relief angle; S4, the threaded hole is bored by the boring tool to remove burrs left at the bottom of the threaded hole; the steps S3 and S4 are repeated until the inner thread specification of the threaded hole is #10-32UNF-2B, #10 is a number, 32 is a number of teeth, UNF represents fine thread, and 2B is the accuracy grade of the inner thread. The threaded hole machining method can reduce part rejection and improve the quality of the threaded hole.

The utility model relates to the technical field of filters, in particular to a replaceable filter of a high titanium slag cleaning tank, which comprises a shell with an opening at the top, and a detachable cover body is arranged above the shell; two symmetrical bottom plates are arranged above the connecting ring, and a connecting pipe penetrating through the connecting hole is installed at the center of the bottom of the bottom plate located below. Two inserting blocks are fixed to the outer wall of the bottom plate located on the lower portion, penetrate through the connecting grooves and are inserted into the tail ends of the mounting grooves, and fixing holes allowing the fixing rods to be connected in an inserted mode are formed in the inserting blocks. The cover body is opened, the fixing rod is pulled out of the fixing hole upwards, the cylinder body is rotated, the inserting block moves to the connecting groove, at the moment, the cylinder body is lifted upwards, and the whole filter part can be disassembled; according to the design, the filter element in the filter can be conveniently and quickly disassembled and assembled, so that the filter element can be conveniently replaced, the replacement difficulty is reduced, the maintenance efficiency is improved, and the filtering effect of the filter on high titanium slag cleaning liquid is ensured.

The invention relates to an adjustable hanging device, and belongs to the field of large titanium slag electric furnace water-cooled furnace cover hanging devices in the metallurgical industry. The adjustable hanging device comprises a fixed seat, an adjusting device, a first hanging pull rod, a second hanging pull rod and a buffer device, wherein the first hanging pull rod is connected to the fixed seat; the second fixing pull rod is connected to the first hanging pull rod through the adjusting device so that the second fixing pull rod can move close to or away from the first hanging pull rod. And the buffer device is connected to the second fixed pull rod. The adjustable hanging device can level a hung object by adjusting the height of the adjustable hanging device.

This invention provides a method for improving the desulfurization capacity of high-titanium slag using an artificial intelligence model, applicable to the smelting of high-vanadium-titanium ore in blast furnaces. The method includes: controlling the MgO content in the slag to 8.0%-9.5% by weight, the binary basicity of the slag to 1.10-1.17, and the Al2O3 content ≤14.5%, while maintaining the MgO to Al2O3 ratio in the slag at 0.60-0.65; maintaining the physical heat of molten iron ≥1440℃; controlling the blast furnace inlet blast temperature ≥1200℃; controlling the sulfur load in the blast furnace inlet to 4.5-5.5 kg, and controlling the proportion of pellets in the blast furnace inlet to 46%-50%; and constructing a dynamic adjustment model based on predicted sulfur load increments and predicted titanium reduction increments, so that the oxygen enrichment rate is dynamically adjusted within a first threshold range, and the blast furnace coal ratio is dynamically adjusted within a second threshold range. This invention can dynamically adjust the oxygen enrichment rate and blast furnace coal ratio according to the sulfur load increment and titanium reduction increment, thereby improving the desulfurization capacity of high-titanium slag.

The present invention provides an auxiliary cementitious material for concrete, a preparation method, and an application thereof. The auxiliary cementitious material comprises the following components in parts by weight: 25-40 parts of modified converter steel slag, 30-40 parts of high-titanium slag, 15-30 parts of modified waste red brick powder, 10-20 parts of desulfurized gypsum, and 0.05-0.1 parts of a grinding aid. The raw materials for the modified converter steel slag include converter steel slag powder, lithium slag powder, calcium-silicon slag powder, and waste red brick powder in a mass ratio of (5.5-7.5):(2-2.5):(1.8-2.4):1; the raw materials for the modified waste red brick powder include waste red brick powder, mixing station waste water, and Ca(OH)2 in a mass ratio of (8-10):(2.2-3.5):1.5. The auxiliary cementitious material of the present invention has enhanced activity due to the coordination of the various components. When applied to concrete, it can play a synergistic and complementary role, increasing the early strength of concrete, reducing efflorescence, and improving its fluidity.

The invention provides a method for jointly smelting high titanium slag by adopting multiple raw materials, which comprises the following steps: S1, adding a binder and water into electric furnace fly ash, and stirring to obtain a first fly ash block; s2, rolling, crushing and screening the first dedusting ash block to obtain a second dedusting ash block; s3, the second dedusting ash blocks are mixed into the titanium concentrate to form a first mixed material; s4, adding a reducing agent into the first mixed material to form a second mixed material; s5, the second mixture and the high-titanium slag fine powder are added into an electric furnace for combined smelting, and high-titanium slag and regenerated electric furnace fly ash are obtained; and S6, cooling, crushing and grading the high-titanium slag to obtain a high-titanium slag finished product and regenerated high-titanium slag fine powder. By means of the method, the electric furnace fly ash and the high titanium slag fine powder can be fully recycled, recycling of by-products and waste products is achieved, the economic benefit of the high titanium slag is improved, meanwhile, the proportion of the regenerated high titanium slag fine powder, mine consumption and power consumption per ton slag are reduced, and the production cost of the high titanium slag is reduced.

The utility model belongs to the technical field of dust absorption equipment, and particularly relates to high titanium slag crushing dust absorption equipment which comprises a fixed base and a dust absorption assembly arranged on the upper surface of the fixed base. The dust collection assembly comprises a mounting frame, a mounting sleeve and a pulverizer body, and the upper surface of the fixed base is fixedly connected with the mounting frame; dust is absorbed through the spiral rotating shaft and the rotating piece, the dust concentration in an operation area is reduced, occupational health risks, such as respiratory diseases, caused by dust are reduced, the working environment is improved, and the comfort level and safety of workers are improved; the amount of dust discharged into the environment is reduced, reduction of air pollution is facilitated, and compared with a traditional dust treatment method, the method can be more energy-saving due to the fact that wind power generated by the spiral rotating shaft can be recycled.

The invention discloses low-shrinkage ultra-high performance concrete as well as a preparation method and application thereof, and belongs to the technical field of building materials. The low-shrinkage ultra-high performance concrete is prepared from the following raw materials in parts by weight: 500 to 600 parts of cement, 1000 to 1500 parts of magnesium-titanium slag sand, 150 to 200 parts of fly ash, 150 to 200 parts of silica fume, 100 to 150 parts of rice hull ash, 150 to 180 parts of steel fiber, 20 to 30 parts of a water reducing agent and 150 to 180 parts of water. The invention further discloses a preparation method and application of the low-shrinkage ultra-high performance concrete. The low-shrinkage ultra-high performance concrete prepared by the invention can better solve the problem of poor long-term durability of the concrete caused by high shrinkage characteristic of the existing ultra-high performance concrete.

The present invention discloses a feeding method for controlling the bottom temperature of a titanium slag furnace, comprising the following steps: detecting the iron mouth temperature T when the liquid level is lowest after the previous slag discharge; when the iron mouth temperature T is less than a first preset temperature T1, adding a first preset amount of material M1 to the titanium slag furnace at one time, and then continuously and evenly feeding the remaining amount of material in this furnace according to the production time of this furnace; when the iron mouth temperature is equal to the first preset temperature T1, adding a second preset amount of material M2 to the titanium slag furnace at one time; when the iron mouth temperature is greater than the first preset temperature T1 and less than or equal to the second preset temperature T2, increasing the amount of material added at one time based on the increase in the iron mouth temperature compared to the first preset temperature T1, starting from the second preset amount of material M2; when the iron mouth temperature is greater than the second preset temperature T2, stopping the furnace. The present application adopts a method of combining centralized feeding first and continuous feeding later, which can effectively block the impact of heat on the furnace bottom, so that the titanium slag furnace can operate stably for a long time.

A low-manganese titanium slag continuous discharging device belongs to the technical field of discharging devices and comprises a storage tank, a controller is mounted on the side wall of the storage tank, a plurality of supporting arms are vertically arranged at the bottom end of the storage tank, a discharging port is obliquely and downwards formed in the bottom end of the side wall of the storage tank, and a flow monitoring assembly and an opening and closing assembly are arranged in the discharging port. In the process that low-manganese titanium slag falls along the discharging port, the discharging amount of the low-manganese titanium slag can be automatically detected, the opening and closing degree of the cover body is automatically adjusted according to the flow and accumulation condition of the low-manganese titanium slag, the discharging continuity is guaranteed, when the flow of the low-manganese titanium slag is large, the cover body is automatically opened to be large, blocking is avoided, and when the flow of the titanium slag is small, the cover body is automatically opened to be large. The cover body is properly closed to be small, stable discharging is kept, the discontinuous discharging phenomenon is reduced, the low-manganese titanium slag in the storage tank can be continuously stirred, the low-manganese titanium slag is continuously pushed to the discharging port, meanwhile, caking formed by the low-manganese titanium slag is broken, and it is guaranteed that the low-manganese titanium slag is in a flowable state all the time.

The utility model relates to the technical field of high titanium slag production, in particular to a high titanium slag melt rapid cooling assembly which comprises a working plate, a cooling cylinder is fixed on the top face of the working plate, a plurality of supporting columns are fixed at the bottom end of the working plate, and a feeding hopper communicated with an inner cavity of the cooling cylinder is fixed on the top face of the cooling cylinder. By arranging the working plate, the cooling cylinder, the feeding hopper, the discharging pipe and the two valves, high titanium slag melt can be stored, a water supply pipe of an external water supply device is tightly connected with the liquid inlet pipe in a sleeved mode, and materials in the cooling cylinder can be stirred through the design of the stirring mechanism; through the design of the cooling mechanism, water mist can be sprayed into the cooling cylinder, and through the design of the cooling mechanism, the atomizing nozzle can spray the water mist while rotating, so that materials can be in full contact with the water mist, and the cooling efficiency of the whole cooling device can be higher and more sufficient.

The application relates to a preparation method of a manganese-containing pellet and a blast furnace smelting method, which comprises the following steps: step a, crushing, water-fine grinding and drying treatment are carried out on high-manganese lump ore to obtain high-manganese concentrate; step b, the high-manganese concentrate and bentonite are uniformly mixed according to a preset ratio to obtain a mixture; step c, the mixture is added into a disc pelletizer, and a pellet core is obtained in a water dripping ball forming mode; step d, based on the pellet core, the water content ratio and the balling time added into the disc pelletizer are controlled, so that the residual mixture of the mixture is uniformly wrapped on the outer layer of the pellet core, and a manganese-containing pellet is obtained. The method improves the traditional preparation method of the manganese-containing pellet, improves the quality of the manganese-containing pellet, and obtains the manganese-containing pellet meeting the performance standard of the blast furnace smelting. The blast furnace adding mode is optimized, the utilization efficiency of the manganese ore is improved, the iron loss is reduced, and the smelting of the high-titanium slag is improved.

The utility model provides a high titanium slag crushing device, which belongs to the technical field of titanium slag crushing, and comprises a bottom plate, a crushing mechanism is arranged at the top of the bottom plate, the crushing mechanism comprises two support rods, the support rods are fixedly arranged at the top of the bottom plate, a main box is fixedly arranged at the tops of the two support rods, and the main box is fixedly arranged at the bottom of the bottom plate. The first crushing cavity is formed in the main box, two first crushing rollers are rotatably mounted in the first crushing cavity, the separation cavity is formed in the side part of the first crushing cavity, and a second crushing cavity is formed in the side part of the separation cavity. Through the arrangement of the crushing mechanism, large particles which are not completely crushed for the first time can be screened and crushed for the second time, the large particles can be further crushed through secondary crushing, and the difficulty of subsequent treatment and processing is reduced, so that the production process is accelerated, the production efficiency is improved, the utilization rate of resources is improved, and the waste of the resources is reduced.

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.

The utility model provides a vanadium-titanium slag crushing system, which belongs to the technical field of vanadium-titanium slag powder production, and comprises a box body, the top of the box body is provided with a feed port, and the bottom of the box body is provided with a discharge port; the first-stage crushing assembly and the second-stage crushing assembly are arranged in the box body from top to bottom, and a material returning opening is formed in one side of the box body and located between the first-stage crushing assembly and the second-stage crushing assembly; a discharging opening in the bottom of the box body is connected with a screening mechanism, the screening mechanism is used for screening the crushed vanadium-titanium slag into large blocks, small blocks and particles, and a large block recycling box, a small block recycling box and a particle concentrating box are arranged below the screening mechanism. Vanadium-titanium slag fragments are subjected to double crushing through the first-stage crushing assembly and the second-stage crushing assembly, the crushed vanadium-titanium slag is screened into three types of different sizes through the screening mechanism so that the vanadium-titanium slag can be poured into the feeding port or the material returning port again to be crushed again, the vanadium-titanium slag fragments can be crushed more thoroughly, and the crushing efficiency is improved. And the crushing effect is improved.

The invention discloses a comprehensive separation and extraction method for vanadium, titanium and iron in vanadium titano-magnetite, and belongs to the technical field of metallurgy. The method includes the following steps that acidolysis mother liquor rich in vanadium and iron and high-titanium slag with titanium as the main component are obtained through external field strengthening hydrochloric acid leaching; carrying out hydrochloric acid analysis on the acidolysis mother liquor rich in vanadium and iron to generate hydrogen chloride gas, adding a neutralizer, and carrying out solid-liquid separation to obtain high-vanadium slag and an acidic solution I containing free hydrochloric acid and ferric chloride; performing extraction and reverse extraction on the high-vanadium slag to obtain a high-purity vanadyl sulfate solution final product; removing calcium from the acid solution I containing free hydrochloric acid and ferric chloride and the raffinate to obtain an acid solution II containing free hydrochloric acid and ferric chloride; evaporating and concentrating an acid solution II containing free hydrochloric acid and ferric chloride, and then burning to generate a metal oxide mainly containing ferric oxide and hydrogen chloride gas; the high titanium slag and concentrated hydrochloric acid are subjected to enhanced reaction under the action of an external field, and titanium dioxide is obtained through calcination. The method can be used for efficiently and comprehensively extracting vanadium, titanium and iron, and has the advantages of high recovery rate, environmental protection property, economical efficiency and high-value utilization.

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 discloses a resource comprehensive utilization method of titanium-containing blast furnace slag, and belongs to the technical field of resource comprehensive utilization of industrial solid waste. The resource comprehensive utilization method of the titanium-containing blast furnace slag comprises the following steps that molten titanium-containing blast furnace slag is subjected to water quenching and grinding refining, and water-quenched slag is obtained; carrying out acid leaching on the water-quenched slag by adopting nitric acid, and carrying out solid-liquid separation to obtain acid leaching liquid and acid leaching slag; the acid leaching residues are subjected to alkaline leaching and solid-liquid separation, and high-titanium residues and alkaline leaching liquid are obtained; adding humic acid, urea, magnesium sulfate and sodium carboxymethyl cellulose into the alkaline leaching solution to obtain a water-soluble silicon fertilizer; wherein the pickle liquor is a valuable metal element recovery raw material; the high titanium slag is a titanium product production raw material; the alkaline leaching liquid is water glass with the silicon content being greater than or equal to 10g / L. Compared with a traditional utilization method, the method has the advantages that refined resource utilization of various valuable components including titanium is achieved, and a high additional value can be generated.

This invention relates to an N-Fe co-doped high-titanium slag-based photocatalytic zeolite, its preparation method, and its application. The method includes the following steps: mixing high-titanium slag powder with ammonium salt and calcining at 300–500°C to obtain a calcined product; subsequently, washing, drying, and grinding to obtain powder A; mixing powder A with an alkali to obtain powder B, then mixing it uniformly with water, and undergoing hydrothermal crystallization, solid-liquid separation, washing, and drying to obtain powder C; mixing powder C with an acidic iron source solution, and undergoing ultrasonic reaction, solid-liquid separation, washing, and drying to obtain N-Fe co-doped high-titanium slag-based photocatalytic zeolite. This invention uses high-titanium slag as the main raw material, mixes it with ammonium salt for high-temperature calcination, then mixes it with an alkali for hydrothermal crystallization, and subsequently reacts it with an iron source to obtain N-Fe co-doped high-titanium slag-based photocatalytic zeolite. This achieves resource utilization of industrial waste, reduces zeolite preparation costs, and the prepared zeolite exhibits good photocatalytic and adsorption performance.

The present application relates to the field of titanium slag smelting and titanium slag preparation of titanium dioxide, and particularly relates to a method for improving acidolysis rate of titanium slag. The method comprises the following steps: step S1, adding the titanium slag after smelting into a cooling device, and the temperature of the added titanium slag is T1; step S2, introducing inert gas into the cooling device to cool the titanium slag once, and the cooling rate is Q1, and the temperature of the titanium slag after the first cooling is T2; step S3, introducing inert gas into the cooling device to cool the titanium slag twice, and the cooling rate is Q2, and the temperature of the titanium slag after the second cooling is T3; step S4, introducing inert gas into the cooling device to cool the titanium slag thrice, and the cooling rate is Q3, and the temperature of the titanium slag after the third cooling is T4; step S5, spraying process water into the cooling device to cool the titanium slag, and when the titanium slag is cooled to T5, the inert gas and the water spraying are stopped, and the cooling of the titanium slag is completed.