21 results about "Wolframite" patented technology

This invention discloses an efficient separation and beneficiation method for scheelite, wolframite, and cassiterite in a tungsten-tin mixed concentrate, comprising the following steps: (1) pre-treatment by grinding, flotation desulfurization, and weak magnetic separation to remove iron from the tungsten-tin mixed concentrate to obtain weak magnetic tailings; (2) concentration and drying of the weak magnetic tailings obtained in step (1) followed by electrostatic separation to obtain electrostatic concentrate and electrostatic tailings; (3) stirring and slurry conditioning of the electrostatic concentrate obtained in step (2) followed by strong magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; stirring and slurry conditioning of the electrostatic tailings obtained in step (2) followed by scheelite upgrading flotation to obtain scheelite concentrate and scheelite flotation tailings. Based on the differences in conductivity, magnetism, and flotation properties of scheelite, wolframite, and cassiterite, this invention employs a “cassiterite / wolframite electrostatic separation-wolframite / cassiterite strong magnetic separation-scheelite upgrading flotation” process to achieve efficient separation of wolframite, scheelite, and cassiterite.

The invention discloses a dressing and smelting combined treatment method for tungsten-tin bulk concentrate, and belongs to the technical field of mineral processing. The method comprises the steps that tungsten-tin bulk concentrate obtained through flotation of a metal ion-hydroximic acid complex collecting agent from tungsten-tin polymetallic ore under the low-alkalinity condition is directly subjected to size mixing, flotation is conducted under the high-alkalinity condition, and bulk concentrate of wolframite and cassiterite and scheelite concentrate are obtained; leaching the scheelite concentrate by using mixed acid to obtain a tungstate-containing acid leaching solution and gypsum; bulk concentrate of wolframite and cassiterite is decomposed through alkaline process autoclaving to obtain tungsten-containing alkaline leaching liquid and tin-rich slag, and cassiterite is recycled from the tin-rich slag through centrifugation. According to the method, OH <-> is used for precisely regulating and controlling the coordination structures of the collecting agents, and efficient separation of scheelite, wolframite and cassiterite is achieved by means of the adsorption characteristic difference of the collecting agents of different coordination structures on the wolframite and the scheelite. And then wet metallurgy is combined to achieve clean and efficient utilization of tungsten resources in the tungsten-tin bulk concentrate and comprehensive recovery of tin resources, and huge economic and environmental benefits are achieved.

The invention discloses a beneficiation method for efficiently separating scheelite, wolframite and cassiterite in tungsten-tin bulk concentrate. The beneficiation method comprises the following steps that (1) the tungsten-tin bulk concentrate is firstly subjected to ore grinding, flotation desulfurization and magnetic separation iron removal, and iron-removed tailings are obtained; (2) performing scheelite normal-temperature flotation on the iron-removed tailings to obtain scheelite rough concentrate and scheelite flotation tailings; (3) the scheelite rough concentrate is subjected to flotation upgrading, scheelite upgraded rough concentrate is obtained, and wolframite and cassiterite are deeply inhibited in the flotation upgrading process; the scheelite quality-improved rough concentrate is subjected to quality-improved fine selection, and scheelite concentrate is obtained; (4) the scheelite flotation tailings are subjected to magnetic separation to achieve separation of wolframite and cassiterite, and wolframite concentrate and tin rough concentrate are obtained; and (5) gangue minerals are removed from the tin rough concentrate through electric separation, and tin concentrate is obtained. According to the beneficiation method, tungsten and tin resources can be efficiently and comprehensively recycled.

The invention belongs to the technical field of wolframite flotation tailing sedimentation, and particularly relates to a wolframite tailing pulp treatment method which comprises the following steps that when the temperature is larger than or equal to 10 DEG C, a polyaluminum chloride solution is prepared; when the temperature is greater than or equal to 15 DEG C, preparing a polyacrylamide solution; then adding the polyaluminum chloride solution into the wolframite tailing pulp with the benzhydroxamic acid concentration of (5 + x) mg / L, uniformly stirring, then adding the polyacrylamide solution, uniformly stirring, and then carrying out flocculating settling; wherein the adding amount of the polyaluminum chloride in each cubic meter of the wolframite tailing pulp is (150 + 10x) g, the adding amount of the polyacrylamide in each cubic meter of the wolframite tailing pulp is (70 + 2x) g, and x is more than or equal to 0 and less than or equal to 5. According to the technical scheme, the dosage of the flocculating agent can be effectively reduced, and the tailing pulp treatment cost is reduced; loss of wolframite metal products during recycling of overflow water is effectively reduced; the settling rate of suspended matters is obviously improved, the content of the suspended matters in the overflow water is effectively reduced, and the muddy flow of the thickening pool is avoided.

The invention belongs to the technical field of tungsten smelting, and particularly relates to a method for jointly producing arsenic, fluorine and phosphorus by using wolframite and scheelite, which comprises the following steps: preparing tungstic acid by using the scheelite and hydrochloric acid; the method comprises the following steps: adding a sulfuric acid solution into tungstic acid, stirring to obtain a mixed solution, adding hydrogen peroxide into the mixed solution, stirring, filtering, washing filter residues, and adding water into the filter residues to prepare uniform slurry; adding the slurry into a sodium tungstate solution prepared from wolframite according to an alkali decomposition process, and stirring to obtain a sodium tungstate feed liquid in which arsenic is less than 10mg / L, fluorine is less than 200mg / L and phosphorus is less than 10mg / L; according to the method, one-step phosphorus, arsenic and fluorine removal can be achieved, the calcium element in scheelite is fully utilized in the process, and other phosphorus, arsenic and fluorine removal agents do not need to be used.

The present disclosure broadly relates to a high temperature chemical process for the synthesis of cesium tungstate in the solid state and the preparation of aqueous solutions or deuterated solutions of cesium tungstate. More specifically, but not exclusively, the present disclosure relates to a high temperature chemical process in which tungsten oxide compounds such as tungsten oxides, or natural or synthetic concentrates such as wolframite or scheelite, tungsten industrial by-products or there mixture thereof, are mixed with cesium compounds such as cesium carbonate, or cesium sulfate, or cesium hydroxide or their mixtures thereof and the mixture is roasted in air or oxygen at high temperature inside a kiln. After cooling, the solid sintered mass containing cesium tungstate is leached or dissolved with water or heavy water for producing dense aqueous solutions or deuterated solutions of cesium tungstate.

The invention relates to a method for preparing an iron-manganese-based photocatalytic material through alkaline leaching of wolframite, the iron-manganese-based photocatalytic material and application of the iron-manganese-based photocatalytic material, and belongs to the technical field of sewage treatment. The preparation method comprises the following steps: carrying out pressurized alkaline leaching on wolframite concentrate, carrying out solid-liquid separation, taking solids, and carrying out drying treatment to obtain the iron-manganese-based photocatalytic material. And the ratio of the amount of substance of Fe to the amount of substance of Mn in the wolframite concentrate is adjusted to be 1.8-2.3: 1. A traditional wolframite leaching process does not have economical application to leaching residues after leaching, and the iron-manganese-based photocatalytic material prepared by adjusting the ratio of the amount of substance of Fe to the amount of substance of Mn in wolframite concentrate and then carrying out pressurized alkaline leaching can not only degrade mine organic wastewater, but also purify the organic wastewater; the influence of the organic wastewater of the mine on the ecological environment of the mine is reduced, the alkaline leaching residues obtained by alkaline leaching of the wolframite concentrate can be well applied, the stockpiling and discharging cost of the alkaline leaching residues and the treatment cost of the organic wastewater are reduced, and the cost benefit is achieved.

The invention relates to the technical field of tungsten ore smelting, and provides a method for smelting ammonium paratungstate from tungsten by recycling wastewater. The method comprises the following steps: mixing scheelite and wolframite mixed ore with a sodium hydroxide solution, carrying out alkali autoclaving to obtain a crude sodium tungstate solution, carrying out impurity removal, molybdenum removal, extraction and reverse extraction to obtain an ammonium tungstate solution, and carrying out evaporative crystallization on the ammonium tungstate solution to obtain ammonium paratungstate; after sodium sulfate wastewater generated by extraction is subjected to activated carbon adsorption and impurity removal, a bipolar membrane is adopted for electrodialysis treatment, a sulfuric acid solution and a sodium hydroxide solution are obtained, the sulfuric acid solution is used for regenerating the extraction agent, and the sodium hydroxide solution is used for alkali autoclaving after being concentrated. According to the method provided by the invention, the sodium sulfate wastewater can be completely returned to be used in the technological process, and no high-salinity wastewater is discharged in the whole process, so that efficient resource recycling of the wastewater is realized, and environmental pollution is reduced; moreover, the method can treat scheelite and wolframite at the same time, the treatment process is short, and the adaptability is wide.

The present invention belongs to the technical field of polymetallic ore dressing, and specifically relates to a comprehensive tungsten-containing polymetallic ore dressing system. The system comprises a crusher, a grinding mill, a magnetic separator, a first mixer, a sulfide ore flotation unit, a second mixer, a scheelite-fluorite co-flotation unit, a first centrifuge unit, a fluorite concentrate tank, and a scheelite concentrate tank. The system sequentially crushes, grinds, removes magnets, removes weakly magnetic ore, flots sulfide ore, flots scheelite-fluorite, and re-separates scheelite-fluorite to produce high-grade concentrates of magnetite, wolframite, sulfide ore, fluorite, and scheelite, achieving comprehensive resource recovery.

The invention belongs to the technical field of tungsten ore beneficiation, and particularly relates to a pre-enrichment beneficiation method for low-grade mixed tungsten ore. The tungsten ore is sequentially subjected to ore grinding, magnetic separation and flotation, and tungsten rough concentrate and flotation tailings are obtained. The pre-concentration beneficiation method can be applied to efficient pre-concentration of micro-fine-particle wolframite, scheelite and scheelite and wolframite mixed ore, and favorable conditions are created for follow-up concentration. According to the pre-enrichment beneficiation method provided by the invention, the flotation process is reasonably set, and meanwhile, the reagents used in the flotation step are optimized, so that the effective recovery rate of tungsten can be greatly improved, and efficient comprehensive utilization of micro-fine tungsten particles is realized. In conclusion, the pre-concentration beneficiation method has the advantages of being simple in process, friendly to the environment and high in beneficiation recovery rate.

The present application relates to a kind of heavy metal pollutants stabilizer of wolframite beneficiation tailings and its application method, can effectively solve the problem of heavy metal pollution of wolframite beneficiation tailings.The stabilizer composition includes: basic component A and reinforcing component B;Wherein basic component A is 100% with total mass, polyaluminum ferric chloride 30%~50%, calcium hydroxide 10%~50%, calcium carbonate 10%~30%, iron oxide 0.1%~5%;Reinforcing component B is sodium tripolyphosphate, and is prepared into aqueous solution and is used.Polyaluminum ferric chloride, calcium hydroxide, calcium carbonate, iron oxide are finely ground to ≤200 mesh, and are activated, and the basic component A is obtained;Reinforcing component B is prepared into 0.1~3.0% aqueous solution and is used.The present application can realize the solidification and stabilization of heavy metal pollutants in wolframite beneficiation tailings, significantly reduce the leaching of heavy metals in tailings, with good weather resistance, can maintain long-term stability.

The application discloses a beneficiation method for recovering tungsten from polymetallic tungsten tailings, and is characterized by comprising the following steps: obtaining strong magnetic concentrate and strong magnetic tailings through strong magnetic separation; concentrating the strong magnetic concentrate to a slurry with a concentration of 30%, adding sodium carbonate to the slurry to make the pH value of the slurry reach 7.0-9.0, then adding sodium hexametaphosphate, OS, salted water glass, lead nitrate and a tungsten capturing agent, and then feeding the mixture into a flotation machine to obtain wolframite concentrate and wolframite tailings; adjusting the strong magnetic tailings to a slurry with a concentration of 30%, adding oxalic acid, water glass and a capturing agent LLR to the slurry, and then feeding the mixture into a flotation machine to obtain scheelite-fluorite concentrate and co-floating tailings; and concentrating the scheelite-fluorite concentrate to a slurry with a concentration of 30%, and then performing 'one roughing and three cleaning' centrifugal gravity separation to obtain scheelite concentrate and fluorite concentrate. Under the acid condition, the flotation effect of the fluorite is enhanced, the interference on the scheelite flotation is reduced as much as possible, and the recovery rate and grade of the wolframite concentrate and the scheelite concentrate are improved.

The invention belongs to the technical field of tungsten resource recycling, and particularly relates to a method for recycling tungsten from mixed tungsten ore rich in mica type micro-fine particles. The mixed tungsten ore is sequentially screened and floated, tungsten concentrate is obtained, the mixed tungsten ore contains tungsten fine silt and mica minerals, the mass percent of the mica minerals is larger than or equal to 25%, and the particle size of the tungsten fine silt is-40 micrometers. According to the method provided by the invention, the flotation process is reasonably set, and meanwhile, the agents used in the flotation step are optimized, so that the method can be used for efficiently recovering the micro-fine tungsten particles in the tungsten fine silt, the effective recovery rate of the tungsten is greatly improved, and the efficient comprehensive utilization of the fine silt tungsten is realized. The method provided by the invention has the advantages of simple process and environmental friendliness, and can be widely applied to the recovery operation of the micro-fine tungsten particles in the wolframite and mountain tungsten fine silt.

The present application belongs to the technical field of pH regulation for flotation of wolframite and scheelite from tungsten tailings, and particularly relates to a method for accurate pH regulation by adding sodium carbonate in the process of flotation of wolframite and scheelite from tungsten tailings, which is suitable for accurate pH regulation of the pulp when wolframite and scheelite are recovered by flotation from tungsten tailings. The method establishes a calibration fitting curve and a fitting curve formula of the mass-volume percentage concentration of sodium carbonate in the pulp and the concentration of hydroxyl ions, accurately calculates the amount of sodium carbonate and the amount of its aqueous solution according to the mass of the actual tungsten tailings and the concentration of the pulp and other parameters, and combines the target pH value for efficient and accurate regulation of the pH value of the pulp, solving the problems of slow adjustment process, late results, and low accuracy of conventional regulation methods, significantly improving the accuracy and efficiency of pH regulation, and reducing the consumption of reagents and the risk of equipment corrosion.

The application discloses a Pb-BHA-SDBS collector and a tungsten-tin separation method for a tungsten-tin polymetallic ore. The Pb-BHA-SDBS collector is formed by the coordination of benzohydroxamic acid, sodium dodecyl benzene sulfonate and lead ions, has high selectivity and high strong collecting capacity for tungsten-tin minerals in a complex tungsten-tin polymetallic ore system, and can realize the co-enrichment of wolframite, scheelite and cassiterite. Based on this, the tungsten minerals and cassiterite in the tungsten-tin polymetallic ore are preliminarily co-enriched by using the Pb-BHA-SDBS flotation reagent system, the mixed concentrate is treated by removing the reagent, the tetradecyl imino dimethyl phosphonic acid flotation reagent system is used, the separation of the cassiterite and the tungsten minerals is easily realized, the cassiterite enters the concentrate to become tin concentrate, and the tungsten minerals enter the tailings to become tungsten concentrate, so that the efficient separation and recovery of the tungsten minerals and the cassiterite in the tungsten-tin polymetallic ore are realized, and the tungsten and tin resources are synergistically extracted.

The present application relates to the technical field of tungsten ore processing. Provided is a method for extracting tungsten from wolframite ore. The method comprises: adding wolframite ore, a certain amount of sodium carbonate, a strong basic salt, and water into a pressure vessel, controlling the temperature and rotational speed, and after leaching is completed, filtering, washing, and drying. The method for extracting tungsten from wolframite ore provided in the present application uses a pressure leaching method using sodium carbonate, a strong basic salt, and water to achieve tungsten extraction, which can not only shorten the process, reduce alkali consumption and production costs, and reduce environmental pollution, but also effectively improve the tungsten leaching rate, and can give full play to the advantages of combining beneficiation with metallurgy to improve the resource utilization rate.

The application belongs to the technical field of hydrometallurgy, and particularly relates to a method for recovering iron and manganese from wolframite acidolysis wastewater, which comprises the following steps: obtaining wolframite acidolysis wastewater containing Fe and Mn, adding a manganese-containing reagent into the wolframite acidolysis wastewater to adjust the pH to 4-4.5, filtering to obtain Fe(OH)3 and a manganese-containing filtrate; and recovering manganese from the manganese-containing filtrate by ion exchange, extraction or precipitation to obtain a manganese-containing product. The application prepares a by-product of iron hydroxide by adding a manganese-containing reagent, does not introduce other impurities in the process, and can subsequently enrich and recover the added reagent, reduces the use of additional consumables, and avoids resource waste; the self-made resin has higher exchange capacity and selectivity than traditional cation exchange resins, and improves the purity of the by-product of manganese sulfate solution; through the graded recovery of iron and manganese, the purity of calcium sulfate generated by subsequent ammonia removal is high, and the calcium sulfate can be sold as a by-product, thereby significantly reducing the solid waste discharge of the whole process.

The invention belongs to the technical field of pH regulation and control of tungsten separation tailings flotation wolframite and scheelite, particularly relates to a method for accurately regulating and controlling pH by adding sodium carbonate in the tungsten separation tailings flotation process, and is suitable for accurately regulating and controlling the pH of ore pulp when wolframite and scheelite are recycled from tungsten separation tailings in a flotation mode. According to the method, a calibration fitting relation curve and a fitting relation curve formula of sodium carbonate mass-volume percentage concentration and hydroxyl ion concentration in ore pulp are established, and the use amount of sodium carbonate and the use amount of an aqueous solution of sodium carbonate are accurately calculated according to parameters such as the mass of actual tungsten separation tailings and the ore pulp concentration in combination with a regulated target pH value; according to the method, efficient and accurate regulation and control of the pH value of the ore pulp are achieved, the problems that a conventional regulation and control method is slow in regulation process, lagged in result, low in accuracy and the like are solved, the accuracy and efficiency of pH regulation are remarkably improved, and meanwhile the reagent consumption and equipment corrosion risks are reduced.

This invention belongs to the field of hydrometallurgical technology, specifically disclosing an apparatus and method for semi-continuous alkaline pressure leaching of tungsten minerals. The apparatus includes a vertical pressure leaching vessel, a flash tank, and a compressed air supply system. The inlet of the flash tank is connected to the outlet of the pressure leaching vessel, and the compressed air pipeline is connected to the top of the pressure leaching vessel. After pressure leaching, the pressure inside the vessel naturally drops to 0.3~0.4 MPa. Compressed air is then introduced to force the slurry into the flash tank, rapidly reducing the pressure to atmospheric pressure before discharge. The diameter ratio of the flash tank to a single pressure leaching vessel is 0.7~0.8, and the volume ratio of the flash tank to the total volume of the pressure leaching vessel is 0.1~0.2. This invention combines flash leaching with compressed air-assisted discharge, solving the problems of slow low-pressure discharge and easy clogging caused by the high viscosity and high solids content of tungsten ore slurry. The low-pressure discharge time is reduced from several hours to several minutes, significantly improving equipment utilization, maintaining batch leaching flexibility, and allowing for waste heat recovery. It is suitable for alkaline pressure leaching of wolframite, scheelite, and mixed ores.

The invention relates to the technical field of tungsten ore smelting, and provides a method for smelting ammonium paratungstate from tungsten without high-salinity wastewater discharge. According to the method, wolframite is decomposed through alkali pressure boiling, scheelite is decomposed through acid leaching, an obtained initial sodium tungstate solution reacts with tungstic acid to obtain a crude sodium tungstate solution, and ammonium paratungstate is obtained through impurity removal, molybdenum removal, extraction, reverse extraction and evaporative crystallization; sodium sulfate wastewater generated by extraction is subjected to impurity removal and then subjected to bipolar membrane electrodialysis treatment, a sulfuric acid solution and a sodium hydroxide solution are obtained, the sulfuric acid solution is used for extracting agent regeneration, and the sodium hydroxide solution is used for alkali autoclaving. According to the method provided by the invention, no high-salinity wastewater is generated, so that the wastewater treatment problem is fundamentally avoided; moreover, the wolframite and the scheelite are treated according to the mineral characteristic difference of the two kinds of ore, it can be guaranteed that the wolframite and the scheelite are fully decomposed, oxalic acid generated by acid leaching of the scheelite can be reused in the process, and the cost can be further reduced.

The invention provides a method for recovering tungsten, silver and gallium from wolframite-containing ore, which is based on the weak magnetic property of wolframite, integrates the coordination of multiple processes of strong magnetic pre-enrichment, weak magnetic separation iron removal, tungsten extraction by flotation, silver-sulfur flotation and gallium extraction by roasting and acid leaching, and realizes the efficient separation and recovery of tungsten, silver and gallium in wolframite-containing ore. The defects that in the prior art, pre-enrichment of wolframite is insufficient, flotation is interfered by iron impurities, silver-sulfur minerals are lost, and the gallium leaching efficiency is low are overcome.