930 results about "Roasting" patented technology

The invention relates to the technical field of anode carbon block roasting, and discloses an energy-saving control system of an anode carbon block roasting furnace, which comprises a data acquisition module, an energy-saving analysis module, a digital twin modeling module, a control execution module and a feedback optimization module, when the combustion state of the roasting furnace is monitored in real time, a multi-layer monitoring framework is constructed to dynamically track the change trend of temperature, flue gas oxygen content and pressure parameters, continuous comparison is performed based on a preset energy-saving reference interval, and when the parameters deviate from an optimization interval, a digital twinborn model is immediately triggered to intervene in analysis, so that the real-time monitoring of the combustion state of the roasting furnace is realized. Prejudgment identification of potential risks of combustion efficiency reduction and abnormal heat loss is achieved, hidden energy loss caused by imbalance of the air-fuel ratio is avoided, the non-planned shutdown frequency of equipment is reduced, and the continuous energy efficiency management and control stability of the production process is guaranteed.

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

The invention provides a method and equipment for producing Li2CO3 based on coordinated roasting of lepidolite and spodumene. The method for producing Li2CO3 based on coordinated roasting of lepidolite and spodumene comprises the steps that S1, ore pretreatment is conducted, specifically, lepidolite and spodumene with the particle size smaller than 5 mm are evenly mixed according to the mass ratio of 1: (1-3), and the mixed ore is finely ground till the particle size is smaller than 75 microns; s2, additive mixing, wherein a composite additive is added into the mixed ore obtained after fine grinding and evenly mixed with the ore, and the composite additive is composed of fluoride, sulfate and a fluxing agent; and S3, coordinated roasting, wherein the mixed materials are fed into a rotary kiln to be roasted. According to the method for producing Li2CO3 based on coordinated roasting of the lepidolite and the spodumene, the lepidolite and the spodumene are roasted in a coordinated mode, the structural and chemical property differences of the lepidolite and the spodumene are utilized, advantage complementation is achieved, the overall extraction rate of lithium is increased, compared with a single lithium extraction technology, the lithium recovery rate can be increased by 10%-20%, and the waste residue generation amount is reduced.

The invention discloses a high-temperature dechlorinating agent for removing hydrogen chloride gas and a preparation method of the high-temperature dechlorinating agent, and belongs to the technical field of dechlorinating, and the preparation method of the high-temperature dechlorinating agent for removing the hydrogen chloride gas comprises four steps of preparing sepiolite-loaded active calcium powder, preparing copper-aluminum coated calcium carbonate whiskers, forming and roasting. According to the high-temperature dechlorinating agent for removing the hydrogen chloride gas, the penetration chlorine capacity is 78.5 to 81.7 percent, the crushing strength is 142 to 160N. Cm <-1 >, and the abrasion rate is 0.8 to 1.2 percent.

The invention belongs to the technical field of rare earth metallurgy and resource comprehensive utilization, and particularly relates to a method for separating and recycling iron and rare earth elements in rare earth iron ore. According to the method for separating and recycling the iron and the rare earth elements in the rare earth iron ore, the iron and the rare earth elements in the rare earth iron ore are recycled through MgO reduction roasting, and the efficient separation and extraction process of the iron and the rare earth elements is achieved by adding additives such as a reducing agent and MgO and through the procedures of reduction roasting, magnetic separation, selective leaching and selective precipitation. And comprehensive utilization of the rare earth-containing iron ore can be effectively realized.

The invention discloses a high-valued utilization method of waste biomass, which comprises the following steps: firstly, applying current to the waste biomass containing carbon element to generate Joule heat, and generating a high-temperature environment in an extremely short time, so as to realize rapid carbonization of the biomass; then conductive carbon black or other auxiliaries do not need to be additionally added, current is applied again to generate Joule heat, a higher-temperature environment is generated within an extremely short time, and graphitization transformation of the biochar is achieved. Compared with traditional pyrolysis, hydrothermal, roasting or chemical vapor deposition methods, the flash Joule thermal method has the advantages of being easy and convenient to operate, short in consumed time, low in energy consumption, high in efficiency, high in safety, environmentally friendly and the like, and is suitable for high-value utilization of various biomass resources and green preparation of graphene materials.

The invention discloses a method and device for automatic roasting and process intelligent control of a belt type roasting machine, and relates to the technical field of pellet roasting of the belt type roasting machine in the metallurgical iron and steel industry. The method comprises the four steps of historical data slice acquisition and modeling, target process parameter determination, feedback verification and online correction and rolling prediction control, a model historical library is established through service slices and time slices, modeling is performed based on a three-layer feed-forward neural network, flexible weighted deviation calculation combined with dynamic weight and rolling optimization of a softening coefficient are combined, and the rolling prediction control is performed. And accurate regulation and control of equipment parameters are realized. The automatic control system is mainly used for automatically controlling the pellet production process of the belt type roasting machine, the product quality stability is improved, the energy consumption is reduced, the labor intensity of workers is relieved, and support is provided for unmanned and intelligent production.

The invention relates to the technical field of synthetic quartz sand, in particular to an ultrapure synthetic quartz sand roasting device which comprises a temperature acquisition unit, a plurality of reaction temperature sensors arranged on the inner side of the furnace wall of a reaction furnace and used for acquiring the temperature of each temperature control area, and a gas temperature sensor, the data acquisition unit comprises a plurality of machine vision devices and a signal detection device, wherein the machine vision devices are used for acquiring the reaction time of each temperature control area; the data analysis unit is used for determining a plurality of same quartz sand roasting characteristic values as a quartz sand roasting characteristic value group, and calculating diffraction peak dispersion characteristic values to determine a target quartz sand roasting characteristic value; the data processing unit is used for judging whether the quartz sand raw material is uniformly dispersed in the reaction furnace; and the finished product detection unit calculates the temperature difference threshold value and the temperature deviation value of each temperature control area to judge whether the reaction furnace works normally or not. According to the method, the roasting accuracy of the ultra-pure synthetic quartz sand is remarkably improved.

The invention relates to the technical field of coal gangue resource utilization, in particular to a magnetic coal series kaolin hydrogel adsorbing material as well as a preparation method and application thereof. The preparation method of the material specifically comprises the following steps: carrying out ultrafine grinding, sieving and grading on coal gangue ore to obtain a coal series kaolinite material; further performing magnetic separation to obtain coal series kaolinite iron-rich tailings; further performing magnetizing roasting in a reducing atmosphere to obtain magnetic coal series kaolin; the preparation method comprises the following steps: compounding magnetic coal series kaolin with sodium alginate and chitosan by adopting a gel coating method, dropwise adding a calcium chloride solution for crosslinking, and freeze-drying to obtain the magnetic coal series kaolin hydrogel material. The preparation method is simple, and the obtained adsorption material has the characteristics of low cost, large adsorption capacity, high adsorption rate, high selectivity, excellent cyclic utilization performance and the like.

The invention relates to the technical field of high-purity quartz purification methods, in particular to a high-purity quartz green low-consumption purification method which comprises the following steps: S1, plasma-assisted crushing pretreatment; s2, complex acid leaching-microwave synergistic impurity removal; s3, fluidized chloridizing roasting; s4, nano bubble water washing-targeted adsorption; s5, performing vacuum heat purification; according to the purification method of the high-purity quartz, the step of complex acid leaching-microwave synergistic impurity removal is adopted, highly toxic hydrofluoric acid in a traditional chemical acid leaching method is abandoned, and the toxicity of waste liquid is greatly reduced; compared with a traditional high-temperature chlorination method which needs a high temperature of 1300 DEG C or above, the method adopts fluidized chlorination roasting, so that the roasting temperature is reduced by 500 DEG C, and the energy consumption is reduced by 40%; nano-bubble ultrapure water is adopted for ultrasonic cleaning, the cleaning efficiency can be improved by 50%, and residual impurities are effectively removed; through innovative design and synergistic effect of all the steps, ultra-high purity of SiO2 with the purity being greater than or equal to 99.996% is realized, and meanwhile, environmental protection, energy conservation and consumption reduction as well as industrial stable production are taken into consideration.

The invention discloses a rapid enrichment-atomic absorption spectrum analysis method for low-content gold in gold ore, and relates to the technical field of gold ore analysis and detection.The rapid enrichment-atomic absorption spectrum analysis method comprises the following steps that an ore sample and a solid composite additive are mixed and roasted at the low temperature of 500-650 DEG C, and the additive contains alkali metal carbonate and zinc oxide; sulfur fixation, catalytic oxidation of organic carbon and stabilization of volatile elements can be synchronously realized; the method comprises the following steps: roasting gold-loaded activated carbon, dissolving the gold-loaded activated carbon in aqua regia to obtain a to-be-enriched solution, enabling the solution to pass through an adsorption column filled with modified activated carbon, pretreating the activated carbon with a 1-10% ammonium citrate solution to improve the selective adsorption capacity of the activated carbon on gold chloride complex ions, ashing the gold-loaded activated carbon, dissolving residues, fixing the volume, and measuring by using an atomic absorption spectrometry. According to the rapid enrichment-atomic absorption spectrum analysis method for the low-content gold in the gold ore, through cooperation of low-temperature roasting of the composite additive and selective adsorption of the modified activated carbon, the decomposition efficiency and enrichment selectivity of the ore difficult to treat are improved.

The invention discloses a method for preparing high-purity quartz and recovering an iron element based on high-silicon tailings, and belongs to the technical field of comprehensive utilization of resources and preparation of high-purity quartz. According to the method, high-silicon tailings are sequentially subjected to mineral dissociation, low-magnetic-field roughing, high-magnetic-field scavenging, flotation and ultrasonic acid leaching treatment, and refined quartz is obtained; and carrying out multi-stage gradient chloridizing roasting and hot-pressing acid leaching treatment on the refined quartz of which the gas-liquid inclusion index and transparency meet the requirements to finally prepare the high-purity quartz of which the SiO2 purity is greater than or equal to 99.995%. In addition, for strong magnetic minerals generated in the magnetic separation process, the iron content of the strong magnetic minerals reaches the standard, the strong magnetic minerals react with the acid leaching filtrate under the ultrasonic strengthening condition to leach iron ions, and iron-rich filtrate is subjected to an iron precipitation reaction to generate iron carbonyl. The method provided by the invention not only provides a reliable judgment basis and a complete technical route for preparing high-purity quartz from the high-silicon tailings, but also opens up a new way for resource utilization of the tailings, and has remarkable industrial application value and environmental benefits.

The invention provides a gold ore phase analysis method, and belongs to the field of mineral analys.The gold ore phase analysis method comprises the steps that a gold ore sample is prepared into ore pulp, the pH value is adjusted to 10-11, ultrasonic cavitation treatment is conducted after polyethylene glycol is added, and limonite turbid liquid and sedimentation bottom mud are obtained through separation; the turbid liquid is subjected to flocculation precipitation, drying, roasting, acid dissolution and impurity removal, and the limonite gold-loaded grade is obtained through the mass difference before and after dissolution and gold concentration determination; separating metal sulfide ore heavy minerals and gangue minerals from the settled bottom mud through artificial heavy elutriation, performing acid dissolution and impurity removal on the metal sulfide heavy minerals, and calculating the gold loading grade of the metal sulfide heavy minerals through mass difference and gold concentration determination; after gangue minerals are subjected to oxidizing roasting, the gold content is measured after concentrated acid dissolution; and calculating the distribution rate of gold based on the result. The gold loading grade and distribution of the limonite phase, the metal sulfide ore phase and the gangue mineral phase are measured in a split-phase mode, the method is highly matched with the gold ore development process, operation is easy and convenient, the result is reliable, and beneficiation and metallurgy technological process formulation and technical index pre-judgment can be effectively served.

The invention discloses a method for recovering iron in tailings of copper separation from copper smelting slag through combination of microwave-assisted oxidizing roasting and magnetic separation, and belongs to the technical field of metallurgical solid waste resource utilization. The method comprises the steps that high-temperature copper smelting slag is subjected to water quenching, crushing and ore grinding, flotation and copper removal to obtain tailings containing silicon iron, after a calcium-based additive is added for ball milling and mixing, microwave oxidizing roasting is conducted under the oxygen-enriched condition, roasting products are subjected to high-gradient magnetic separation after crushing and ore grinding, and iron ore concentrate and magnetic separation tailings are obtained. According to the method, the strong wave-absorbing characteristic of fayalite is utilized, the roasting temperature and energy consumption are reduced through microwave heating, iron-silicon separation is achieved through a calcium-based additive, and iron is recycled through magnetic separation in one step. The final magnetic separation iron recovery rate reaches 85% or above, the iron ore concentrate grade exceeds 60%, magnetic separation tailings can be used as building materials, the process is simple, the cost is low, environment friendliness is achieved, the defects of a traditional process are overcome, and high-value utilization of solid waste is achieved.

The application provides a high-efficiency recovery method for copper in chalcocite-type copper concentrate sulfuric acid roasting and acid leaching residue, and belongs to the technical field of mineral processing.The application recovers sulfide copper minerals and intergrowth of the sulfide copper minerals and cupric ferrite in chalcocite-type copper concentrate sulfuric acid roasting and acid leaching residue through flotation, then recovers cupric ferrite and intergrowth of the cupric ferrite and the sulfide copper minerals in middlings and tailings in the flotation through magnetic separation, and finally recovers superfine cupric ferrite and copper mineral particles completely wrapped by gangue minerals in the tailings in the magnetic separation through chemical dissociation.The application uses the method of combination of flotation, magnetic separation and chemical dissociation, strengthens recovery of the copper in chalcocite-type copper concentrate sulfuric acid roasting and acid leaching residue, and the comprehensive recovery rate can reach 91.18%.

This invention discloses a method for the efficient treatment and recovery of copper and molybdenum from high-copper-molybdenum concentrate. The method involves pre-treating low-grade high-copper-molybdenum concentrate with oxygen-pressure water leaching to remove copper. The resulting low-copper-molybdenum concentrate is then processed through oxidative roasting, alkaline leaching, extraction, and evaporation crystallization to prepare ammonium molybdate. The copper-removing solution is then subjected to synergistic extraction and stepwise back-extraction to recover copper and molybdenum. This method not only achieves efficient removal of copper from the high-copper-molybdenum concentrate, avoiding the impact of copper on molybdenum recovery and ammonium molybdate preparation, but also innovatively employs a synergistic extraction and stepwise back-extraction method to separately enrich and recover copper and molybdenum. Matching this with an electrowinning process achieves high-value copper recovery. Simultaneously, the acidic copper extraction residue and the alkaline molybdenum extraction residue are synergistically neutralized, saving reagent costs.

The invention relates to the technical field of suspension roasting, in particular to a flowing suspension roasting system and method for desiliconizing and purifying coal gangue. The system comprises a multi-stage preheating unit, a multi-stage cooling unit, a flowing suspension roasting furnace and a crystal form control device which are connected in sequence, and the method comprises the steps that coal gangue materials are subjected to multi-stage preheating, so that the materials are heated in stages; performing high-temperature roasting in a flowing suspension roasting furnace, and controlling the retention time of the material and the environment temperature in a crystal form control device so as to regulate and control the crystal form structure of the material. By accurately controlling the roasting process and optimizing material crystal form transformation, efficient removal of silicon in the coal gangue and efficient extraction of aluminum oxide are achieved, and the method has the advantages of being low in energy consumption, high in efficiency and good in environment friendliness and is suitable for large-scale industrial production.

The invention belongs to the technical field of thermometallurgy, and discloses a method for enriching and recovering germanium from germanium-containing lignite. The method comprises the following steps: pelletizing iron-containing minerals, germanium-containing lignite and a binder, carrying out reduction roasting on dried pellets at high temperature, reducing and volatilizing germanium in the roasting process, and collecting a volatile product GeO or GeS as a raw material for extracting germanium metal. The method for synergistically utilizing the iron-containing minerals and the germanium-containing lignite has the advantages of being short in process, high in operability, high in product value and the like.

This invention relates to a detoxification method for simultaneously removing dioxins and heavy metals from waste incineration fly ash. The method includes fly ash pretreatment and simultaneous removal of dioxins and heavy metals. First, sodium and potassium salts are removed from the fly ash by immersion washing to avoid reducing the ability of the sintered products formed during high-temperature sintering to solidify heavy metals. Then, the pretreated fly ash is separated to obtain a solid phase, which is mixed with magnesium and / or calcium salts and subjected to high-temperature roasting. This allows the chlorine from the decomposition of dioxins in the fly ash to react with the heavy metals to form gaseous heavy metal chlorides, thus removing the heavy metals from the fly ash. During the high-temperature roasting process, the magnesium and / or calcium salts react with the ash in the fly ash to form calcium silicate and / or magnesium silicate, enhancing the solidification ability of the internal lattice of the fly ash sintered products. After detoxification treatment of waste incineration fly ash using this method, no heavy metals Hg, Pb, Cd, Cu, and Ni were detected in the fly ash leachate, significantly reducing the leaching risk of residual heavy metals in the fly ash.

The invention relates to the technical field of carbon material preparation, and discloses a preparation method of high-density low-porosity isostatic pressing graphite, which comprises the following steps: preparation of composite powder: mixing carbon aggregate, a transient liquid phase forming agent, a temporary binder and a high-temperature volatile pore net stabilizer to obtain the composite powder; performing cold isostatic pressing, namely performing cold isostatic pressing on the composite powder to obtain a green body; synergistic densification roasting: carrying out two-stage roasting on the green body in an atmosphere to obtain a high-density roasted blank; wherein the second heating rate of the first stage is higher than the first heating rate of the second stage; graphitization: carrying out high-temperature graphitization treatment on the high-density roasted blank to obtain a finished product. According to the method, the high-temperature volatile pore net stabilizer and the transient liquid phase forming agent are utilized, and a two-stage dynamic heating roasting scheme is matched, so that time sequence collaboration of pore supporting and liquid phase filling is realized.

The invention discloses a heterogeneous Fenton-like catalyst, a preparation method, a reaction device and a pretreatment method thereof. According to the catalyst, high-iron-content ash is used as a base material, porous magnetic particles of 3-5 mm are prepared through biomass reduction, magnetic separation enrichment, bonding granulation and roasting, the specific surface area is 200-300 m < 2 > / g, and the porosity is 70-80%. The device is of a closed vertical three-area structure, a pipeline mixer and a tangential nozzle are adopted to form rotational flow, and a gas collecting hood collects waste gas and is provided with a backwashing loop from bottom to top. During operation, H2O2 is added according to 1-1.5 times of the COD (Chemical Oxygen Demand) of inlet water under the nearly neutral condition that the pH value is 5-7, and the catalyst stays for 30-60 minutes, so that high-salt high-chlorine refractory organic wastewater can be efficiently degraded, iron mud can be reduced, backwashing and recycling are easy, the operation cost is reduced, and the method has engineering popularization value and is stable and reliable in operation.

The invention belongs to the technical field of cooperative control, and belongs to an ultrahigh-power graphite electrode roasting multi-parameter cooperative control method and system, and the method comprises the steps: collecting full-dimensional operation parameters of a roasting system, carrying out the partition division of a roasting furnace, and collecting the coupling state data of each partition in real time. And identifying different roasting abnormal scenes based on the coupling state data, and constructing process collaborative risk data under different roasting abnormal scenes in combination with the stage of the current roasting process and the aging state of the furnace body. And marking a to-be-adjusted parameter set in the cooperative control strategy according to the process cooperative risk data, and performing adjustment to obtain an optimized cooperative control strategy. According to the balance degree index, performing comprehensive evaluation on each control node in the optimization cooperative control strategy, defining the control nodes which do not pass the evaluation as risk nodes, and generating a risk adjustment strategy pointing to the risk nodes; according to the method, multi-target collaborative optimization can be realized, the production cost is reduced, and the stability and controllability of the roasting process are improved.

According to the furnace top heat supply type annular roasting system, the annular working face is adopted, the cooling section is divided into four sections, hot air from the furnace hoods flows to the four process sections, hot air generated by the furnace hoods of the first cooling section and the second cooling section is used for pellet roasting after being heated in a pipeline, hot air generated by the furnace hoods of the third cooling section and the fourth cooling section is used for preheating and forced air drying of pellets, and therefore the pellet roasting efficiency is improved. By means of the arrangement, hot air utilization is more sufficient and reasonable, energy is saved, heat distribution is even, and pellet underfiring and overfiring are prevented. The preheating section and the roasting section adopt a furnace cover top air supply technology, so that bias flow of hot air in a furnace cover is reduced, and the technology is a guarantee for uniform roasting of pellets. Drying, preheating, roasting and cooling processes of the pellets are all completed on one device, and operation is easy. And compared with a belt type roasting machine, trolleys are reduced by half, and the investment is relatively low. The system has the characteristics of small occupied area, uniformity in pellet roasting and low investment cost, and is suitable for medium and small-scale production. The invention further provides a process method of the furnace top heat supply type annular roasting system.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The invention provides nano magnesium aluminate spinel with high sintering activity and high dispersity and a preparation method thereof, and belongs to the field of nano material preparation. The method comprises the following steps: mixing aluminum chloride, magnesium chloride and deionized water to obtain a mixed solution; adding aluminum bicarbonate into the mixed solution, and carrying out hydrothermal reaction, so that aluminum hydroxide and magnesium hydroxide are precipitated at the same time to obtain a magnesium aluminate spinel precursor; the magnesium aluminate spinel precursor is subjected to first-stage roasting, so that the magnesium aluminate spinel precursor is subjected to flash pyrolysis to form a fine crystal nucleus, and a pyrolysis product is obtained; and performing second-stage roasting on the pyrolysis product to control the crystal nucleus of the pyrolysis product to grow along a specific crystal face, thereby obtaining the nano magnesium aluminate spinel powder. A nanoscale precursor is precisely regulated and controlled to be controllably and orderly separated out through a wet-process system micro-area reaction; the crystal form development, the microstructure and the size uniformity of the powder are controlled through a flash pyrolysis nucleation-crystal face oriented growth two-stage roasting technology.

The invention discloses a method for preparing a vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, and belongs to the technical field of vanadium electrolytes. In order to improve the impurity separation depth and the product purity of the vanadium electrolyte, the invention provides a method for preparing the vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, which comprises the following steps: removing silicon from the leaching solution, selectively reducing and acidifying, extracting anions, washing, reducing and reversely extracting, degassing and deoiling, and electrolyzing to obtain the 3.5-valent vanadium electrolyte. According to the method, the sodium-modified vanadium-containing leaching solution is used as a raw material, anions in the solution are completely converted into cations in a mode of combining pretreatment deep silicon removal with selective reduction acidification, vanadium is in an anion form, all impurity ions in the solution are efficiently separated through anion extraction-reduction reverse extraction, and the purity of the vanadium-containing leaching solution is improved. The prepared vanadium electrolyte product is extremely low in impurity ion content, the vanadium yield is remarkably improved, and the preparation cost of the high-purity vanadium electrolyte is greatly reduced.

The invention provides high-purity superfine titanium diboride and a preparation method thereof, and relates to the field of titanium diboride preparation. The method comprises the following steps: mixing boron oxide, titanium hydride, a carbon source, nano rare earth oxide and an organic solvent, and drying to obtain a mixture; in a vacuum environment, performing first roasting on the mixture to obtain a first roasted material; and in an oxygen-containing atmosphere, carrying out second roasting on the first roasting material to obtain the high-purity superfine titanium diboride. In the first roasting process, boron oxide, titanium hydride and a carbon source are completely melted and fully contacted, then further, the carbon source forms a carbon skeleton, the contact area between the melted boron oxide and titanium hydride and the carbon skeleton is further enlarged, liquid-liquid mixing and the increase of the contact area can reduce the reaction kinetic conditions, the reaction temperature is greatly reduced, and the reaction time is greatly shortened. The particle size of the generated titanium diboride is reduced, and the molten boron oxide and titanium hydride react on the porous carbon skeleton in a liquid-liquid form to generate the high-purity superfine titanium diboride.

Disclosed in the present invention is a method for removing inclusions inside roughing quartz particles of hematite tailings. The method comprises the following steps: S1: roasting and water quenching: roasting the roughing quartz particles of hematite tailings at 650-700 °C for 2-5 hours, followed by water quenching; S2: grinding: grinding the water-quenched quartz particles in step S1 to 500-400 meshes; S3: magnetic separation: removing mineral inclusions from the quartz particles obtained in step S2 by means of a superconducting high-gradient magnetic separator; S4: roasting: roasting the quartz particles obtained in step S3 at 1000-1250 °C for 2-5 hours, followed by cooling, and then roasting at 750-1000 °C for 4-5 hours, the step being repeated 3-5 times; and S5: acid leaching: subjecting the quartz particles obtained in step S4 to three-stage cyclic acid leaching to remove mineral and gas-liquid inclusions from the quartz particles, so as to obtain high-purity quartz sand. The high-purity quartz prepared by the present invention has a SiO2 grade as high as 99.9% or above, which meets the standard of refined quartz sand, thereby effectively achieving the purpose of high-value and resource utilization of hematite tailings.

The invention relates to the technical field of catalysts, and provides an anti-poisoning CO oxidation catalyst as well as a preparation method and application thereof. The molecular sieve is used as a carrier, the noble metal is used as an active component, two ion exchange processes of liquid ion exchange and solid ion exchange (roasting) are adopted, the noble metal active component is loaded in a pore channel of the molecular sieve carrier, and the obtained catalyst shows excellent catalytic activity and anti-poisoning tolerance in sintering flue gas CO catalytic oxidation. The prepared catalyst has SO2 resistance, water resistance, HCl resistance and alkali metal poisoning resistance at the same time, is long in service life, high in catalytic activity and high in CO conversion rate, can be applied to treatment of CO in sintering flue gas in the steel industry, can reduce emission of CO, can also utilize the high calorific value characteristic of CO to achieve energy-saving value, and has wide application prospects.

The invention relates to the technical field of efficient lithium extraction of clay-type lithium ore and waste lithium iron phosphate, in particular to a method for collaborative roasting-selective lithium extraction of clay-type lithium ore and waste lithium iron phosphate, which comprises the following steps: respectively crushing and finely grinding clay-type lithium ore and waste lithium iron phosphate until-200 meshes account for 50-90%, dynamically proportioning and mixing to obtain a mixture with Li2O grade of 0.9-1.2%; and then carrying out mixed roasting, adding into a dilute sulphuric acid solution, and carrying out agitation leaching and filtering to obtain a lithium-containing leaching solution. According to the method, the thermodynamic complementation mechanism of the two materials is utilized, the roasting energy consumption is reduced, the double synergistic leaching mechanism is utilized, the leaching of lithium is enhanced, the content of impurities in the leaching solution is reduced, and the efficient selective leaching of the clay type lithium ore and the lithium in the waste lithium iron phosphate is realized.