265 results about "Titanium slag" patented technology

The invention belongs to the technical field of ironmaking, and particularly discloses a method for producing titanium-rich direct reduction iron and high-titanium slag by using vanadium titano-magnetite, which comprises the following steps: preparing vanadium titano-magnetite raw ore into vanadium-titanium-iron concentrate powder and titanium concentrate powder, mixing the vanadium-titanium-iron concentrate powder and the titanium concentrate powder with a binder to prepare iron-titanium concentrate composite green pellets, and oxidizing and roasting to obtain the titanium-rich direct reduction iron and high-titanium slag with the compressive strength of more than 2000N / pellet and the compressive strength of more than 2000N / pellet. The reduction expansion rate of the iron-titanium concentrate composite high-titanium pellets is smaller than 20%; the iron-titanium concentrate composite high-titanium pellets are subjected to a direct reduction reaction in a shaft furnace, and titanium-rich direct reduced iron with the metallization ratio larger than or equal to 85% is obtained; and molten iron and high-titanium slag are obtained after the obtained titanium-rich direct reduced iron is subjected to melting separation through a melting separation electric furnace. According to the method, the iron-titanium concentrate composite high-titanium pellets meeting the direct reduction smelting requirement of the gas-based shaft furnace are prepared and applied to the gas-based shaft furnace for direct reduction production of the titanium-rich direct reduction iron, high-quality titanium-rich raw materials can be provided for smelting titanium slag in a melting electric furnace, and the problem that the recovery rate of titanium resources in existing vanadium titano-magnetite is low is effectively solved.

The invention belongs to the technical field of building materials, and discloses a high-activity composite auxiliary cementing material based on carbonated steel slag-carbide slag as well as a preparation method and application of the high-activity composite auxiliary cementing material. The high-activity composite auxiliary cementing material is prepared from the following raw materials in parts by mass: 40 to 55 parts of carbonated steel slag-carbide slag composite micro powder, 30 to 40 parts of high titanium slag, 20 to 25 parts of metakaolin, 3 to 5 parts of ardealite, 3 to 5 parts of calcium carbonate, 3 to 5 parts of calcium carbonate and 3 to 5 parts of calcium carbonate. Wherein the carbonated steel slag-carbide slag composite micro powder is obtained by carrying out carbon sequestration reaction on steel slag and carbide slag in a solution consisting of a carbonization enhancer, an additive and water. On one hand, the CO2 storage amount of the steel slag and the carbide slag is increased, the stability and the activity are improved, on the other hand, the carbonized steel slag-carbide slag and other industrial solid waste are cooperated to achieve a composite superimposed effect, the cement mortar or the concrete can be improved in strength, stability and durability, the comprehensive performance is good, and the cost is low. And the method is green, low-carbon, energy-saving, environment-friendly and wide in popularization and application

The invention discloses low-shrinkage all-solid waste concrete and a preparation method thereof. The low-shrinkage all-solid waste concrete is prepared from the following raw materials in parts by mass: 14 to 20 parts of solid waste-based cementing material, 25 to 40 parts of high-titanium heavy slag sand, 35 to 50 parts of high-titanium heavy slag gravel, 5.5 to 7.5 parts of water and 0.2 to 0.5 part of water reducing agent, the solid waste-based cementing material comprises the following components in parts by mass: 40-70 parts of water-quenched slag powder, 10-30 parts of carbide slag, 10-20 parts of gypsum, 5-20 parts of fly ash and 0-5 parts of silica fume. By utilizing the internal curing effect of the titanium slag aggregate, continuous water can be provided for concrete hydration, the later-stage dry shrinkage of the concrete is reduced, and the strength of the concrete is improved; the high alkalinity of the carbide slag and the high sulfate content of the gypsum are utilized, and the alkali-sulfate synergistic excitation effect is utilized, so that the activity of the water-quenched slag powder and the like can be fully excited under the condition that cement and a chemical exciting agent are not used, and the strength performance of the concrete is ensured; meanwhile, steel slag is not used as a component material, so that the problem of poor concrete volume stability caused by the steel slag can be avoided.

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 discloses a modification method for obtaining melt separation titanium slag based on a hydrogen-based shaft furnace reduction-melt separation process, and belongs to the technical field of titanium-containing melt separation slag modified.The method specifically comprises the steps that S1, high-titanium vanadium-titanium pellets are prepared; s2, high-titanium type vanadium-titanium metallized pellets are prepared, and reduction is conducted through a hydrogen-based shaft furnace; s3, the high-titanium type vanadium-titanium metallized pellets are subjected to melt separation, and titanium-containing melt separation slag is obtained; s4, the titanium-containing molten slag is subjected to modification treatment of silicon extraction and magnesium reduction, and anosovite phase precipitates are obtained; the method provided by the invention lays a foundation for pure steel production; impurities in the smelting process are few, and products are pure; a hydrogen reduction gas product (water) is easy to separate and treat, so that clean production can be realized; iron is extracted and other valuable components are enriched at the same time; when the vanadium titano-magnetite is subjected to hydrogen reduction, TiO2 cannot be reduced, and separation of iron and titanium components in the subsequent process is facilitated.

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 utility model relates to the technical field of metal smelting, in particular to a high titanium slag raw material pretreatment device which comprises a heating part, a heating pipe is fixed between the two fixing plates, a plurality of fixing strips are fixed to the inner wall of the heating pipe, and a plurality of electromagnetic induction coils are installed on one side wall of each fixing strip; the high titanium slag can be directly placed in the feeding hopper, along with rotation of the auger, the high titanium slag slowly moves in the discharging pipe, the discharging pipe penetrates through the heating pipe, under the action of the electromagnetic induction coils, the discharging pipe can be heated, the discharging pipe can synchronously transfer heat to the high titanium slag in the discharging pipe, and preheating treatment can be conducted on the high titanium slag; the preheated high titanium slag can be directly discharged into subsequent processing equipment after being discharged through a discharge pipe; according to the design, the high titanium slag can be directly preheated, the high titanium slag does not need to be transferred in the preheating process, the preheating efficiency of the high titanium slag is improved, and the operation risk is reduced.

The invention discloses a method for remelting and utilizing titanium slag smelting fly ash, which comprises the following steps: mixing the fly ash and wet titanium concentrate, drying to obtain a mixture, and smelting and deslagging by controlling the feeding and power supply of the mixture, the titanium concentrate and a reducing agent. The method provided by the invention can effectively improve the TiO2 recovery rate and reduce the production cost.

The invention relates to the field of metallurgy, and provides an efficient titanium slag smelting method which comprises the following steps: controlling the total charging quantity of titanium concentrate in a single furnace according to the effective volume and rated power supply power of an electric furnace, blanking according to a fixed feeding speed, and calculating the total charging quantity of a reducing agent in the single furnace based on the total charging quantity of the titanium concentrate in the single furnace, blanking is carried out according to the feeding speed from high to low; the titanium concentrate and a reducing agent are conveyed into a smelting furnace to be subjected to continuous micro-negative-pressure smelting, first-time deslagging operation is carried out, a first part of titanium slag is obtained, and electrification is maintained; and when the total iron content of the first part of titanium slag is reduced to an expected value, electrifying is stopped, secondary slag tapping and iron tapping operation are carried out, and a second part of titanium slag and low-carbon molten iron are obtained. According to the method, on the premise that the unit furnace burden reducing agent adding amount and the unit power supply power are not changed, the furnace feeding system and the corresponding power supply power of the reducing agent are adjusted, so that the high-and-low carbon adding system and the low-and-low power supply system are formed, and the smelting efficiency in the titanium slag smelting process is effectively improved.

The invention relates to a vanadium-titanium slag-based low-carbon cementing material and a preparation method thereof. The vanadium-titanium slag-based low-carbon cementing material comprises the following raw materials: 50-65% of vanadium-titanium slag, 15-24% of steel slag, 14-18% of citric acid slag, 5-8% of lithium slag and 1.0-2.0% of a composite active exciting agent, except the composite active exciting agent, the rest of the raw materials in the ratio are dry base materials which are dried until the water content is less than 1%; the preparation method comprises the following steps: 1, mixing and pretreating the citric acid slag and the steel slag; 2, drying the raw materials; 3, carrying out ultrafine grinding on the raw material part; step 4, performing coarse grinding on the raw material part; and 5, uniformly mixing the ultrafine powder obtained in the step 3 and the coarse powder obtained in the step 4 according to a ratio to obtain the vanadium-titanium slag-based low-carbon cementing material. Various solid waste materials are utilized for synergistic excitation, production can be achieved without high-temperature calcination, and the low-carbon significance is achieved.

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 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 discloses a high titanium slag aggregate concrete mix proportion design method based on aggregate characteristics. The high titanium slag aggregate concrete mix proportion design method comprises the following steps: S1, measuring saturated surface dry water absorption rates of high titanium slag sand, high titanium slag stone, common sand and common stone used in concrete raw materials; s2, determining the sand and stone aggregate grading of the high titanium slag aggregate concrete according to a close packing theory; s3, determining the volume of the slurry and the volume of the aggregate according to the void ratio of the aggregate generated by aggregate accumulation and the surplus slurry; s4, the water-binder ratio is determined according to the high-titanium slag aggregate saturated surface dry water absorption rate improved Bolomey formula, and the high-titanium slag aggregate concrete proportion based on the aggregate characteristics is obtained. According to the method, the aggregate characteristics of the high-titanium slag are fully considered, the high-titanium slag aggregate concrete meeting the performance requirements can be designed according to the strength required by the concrete and the use amount of the high-titanium slag aggregate, and the design method is simple, effective, time-saving and labor-saving, and provides a design basis for promoting the application of the 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.

The invention relates to the technical field of titanium slag separation, in particular to a method for separating perovskite and preparing a battery material based on blast furnace titanium slag. According to the method, the silicate mineral phase in the blast furnace titanium slag is reconstructed so that the silicate mineral phase can be completely dissolved by acid, meanwhile, low-valence titanium in the silicate mineral phase is oxidized into high-valence titanium, the high-valence titanium is enriched in the perovskite phase, and then separation and purification of CaTiO3 in the titanium slag are achieved; furthermore, sodium titanate hydrate and calcium titanate hydrate with porous network structures are loaded on the surface of the separated and purified CaTiO3, so that the bonding strength of the CaTiO3 and the polyethylene diaphragm can be enhanced, and the thermal stability of the solid electrolyte interface layer of the lithium battery prepared on the basis of the high titanium slag is further improved. In a word, the invention not only provides a new method for separating and purifying the blast furnace titanium slag, promotes high-value utilization of the blast furnace titanium slag, but also provides a new thought and method for preparing the solid electrolyte interface layer of the lithium battery, and has a wide application prospect.