10 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 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 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 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 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.

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 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.