86 results about "Wolframite" patented technology

The invention provides a method for extracting tungsten from wolframite or scheelite and wolframite mixed ores. In the process of grinding the tungsten ores (wolframite, scheelite and wolframite mixed ores or tungsten fine silt), an alkaline calcium-containing substance is blended and fine grinding and pulp blending are performed, and then the obtained ore pulp is decomposed by use of phosphoric acid-sulfuric acid. The method has the advantages that the restriction that a sulfuric acid-phosphoric acid mixed system fails in treating the wolframite is broken through, the normal-temperature and normal-pressure efficient decomposition of the wolframite and the scheelite and wolframite mixed ores in the system is realized, and the requirements of the method on the raw material are reduced; for the wolframite, the decomposition rate can be above 98%, and for the scheelite and wolframite mixed ores, the decomposition rate can be above 97%; and the whole process is convenient to operate and prone to industrialization.

The invention discloses a mineral separation method for recycling wolframite from a tailing. The mineral separation method comprises the following steps that (1) gravity separation of a centrifugal machine is conducted for tailing discarding and preenrichment; (2) sulphide ore flotation is conducted; (3) magnetic separation is conducted and magnetic impurities are removed; (4) high-gradient magnetic separation is conducted for wolframite enrichment; (5) tabling gravity separation is conducted to obtain coarse grained wolframite; and (6) flotation is conducted to obtain fine grained wolframite. By means of centrifugation gravity separation preenrichment, the separation grade of the wolframite is improved, the ore feeding quantity and the mud content of wolframite separation are reduced, and flotation reagent dosage is saved. By means of the sulphide ore flotation and magnetic separation iron removal, the disturbance of sulphide minerals and magnetic minerals on wolframite separation is reduced. According to the mineral separation characteristics of the wolframite, the separation index of the wolframite is improved by adopting the high-gradient magnetic separation and the coarse grained and fine grained wolframite grading and separation process. Efficient recycling of the wolframite in low-grade wolframite tailing resources is achieved, and the mineral separation method is environmentally friendly, efficient and energy saving, and suitable for application and popularization.

The invention provides a collecting agent for collecting minerals of oxidized ores such as ilmenite and a preparation method thereof, and belongs to the technical field of mineral flotation collectingagents. The mineral flotation collecting agent for the oxidized ores such as ilmenite is used after ammonium dibutyl dithiophosphate, ethylenediaminetetraacetic acid salt, maleate, sodium oleate andthe like are mixed; and the mineral flotation collecting agent has the characteristics of good water solubility, good dispersion and high selective adsorption ability to objective minerals, and is mainly used for flotation separation of valuable minerals in the oxidized ores such as the ilmenite, scheelite and wolframite. The preparation method of the mineral flotation collecting agent for the oxidized ores is simple in process, operation is easy to control, the prepared collecting agent has the advantages of high selectivity, good dispersion, low agent dosage and high mineral separation comprehensive efficiency, and quite important significance for promoting mineral separation of the minerals such as the oxidized ores is achieved.

The invention provides a tungsten ore sorting method and belongs to the technical field of ore dressing. According to the tungsten ore sorting method, tungsten ore drawing raw ore is pre-selected anddiscarded to obtain qualified ore containing primary mud; one-stage closed-circuit grinding is performed on the qualified ore to obtain ore pulp to be sorted; flotation desulfurization is performed onthe ore pulp to be sorted, and obtained desulfurized tailing ore pulp is graded to obtain coarse ore pulp and fine ore pulp; a gravity separation and magnetic separation combined process of a shakingtable is adopted on the coarse ore pulp and the fine ore pulp to obtain wolframite concentrate, scheelite concentrate, shaking table middlings, shaking table overflow and discardable shaking table tailings; and after the shaking table middlings are subjected to roll milling, wolframite concentrate, scheelite concentrate, shaking table overflow and discardable shaking table tailings are obtained through the gravity separation and magnetic separation combined process of the shaking table; and after all the shaking table overflows are combined and then reselected, fine mud concentrate and discardable tailings are obtained. The method provided by the invention not only can realize effective recovery of tungsten resources, but also has the characteristics of simple flow structure, low production cost, ecological environment friendliness and the like.

The invention relates to a method for extracting tungsten by pressurization decomposition on wolframite or black and white tungsten mixed ore through hydrochloric acid-phosphoric acid. The method is mainly characterized in that a reaction system is pressurized in the process of extracting tungsten from wolframite or the black and white tungsten mixed ore with mix acid of phosphoric acid and hydrochloric acid, so that the temperature of the reaction system is higher than 100 DEG C. According to the method, by pressurizing, calcium-containing compounds do not need to be added to conduct conversion on the black tungsten in the extracting process of the tungsten, that is, the tungsten can be directly extracted from wolframite or the black and white tungsten mixed ore, so that the production process is simplified, and the production cost is reduced.

The invention relates to a beneficiation method for recovering wolframite from tailings, and belongs to the technical field of beneficiation recovery. The beneficiation method for recovering wolframite from tailings comprises the steps: (1) grinding wolframite tailings until the -0.075mm content is 70-90%; (2) performing magnetic separation on the materials obtained in the step (1) under the magnetic field intensity of 0.1-0.2T to obtain weak magnetic concentrate and weak magnetic tailings; (3) performing magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 0.8-1.4T to obtain strong magnetic concentrate and non-magnetic tailings; (4) classifying the strong magnetic concentrate obtained in the step (3) into two grades of +0.051-0.075 mm, and -0.051-0.075 mm, and taking the coarse fraction therein; and (5) carrying out gravity separation on the materials obtained in the step (4), firstly carrying out roughing separation to obtain roughed concentrate, roughed middlings and roughed tailings, carrying out scavenging separation, wherein the feeding raw materials are the roughed middlings to obtain scavenged concentrate and scavenged tailings, and combining the roughed concentrate with the scavenged concentrate to obtain gravity separation wolframite concentrate. According to the beneficiation method for recovering wolframitefrom tailings, a flotation process which can be adopted in conventional wolframite beneficiation recovery is avoided, any chemical agent does not need to be added, and secondary pollution to the environment is avoided.

The invention provides a medium low-loss LTCC microwave dielectric ceramic material and a preparation method thereof.The LTCC microwave dielectric ceramic material comprises a two-phase mixed ceramicmaterial, the main crystalline phase is ZnZr(1-x)TixNb2O8 of a monoclinic wolframite structure, x is 0.1-0.2, the auxiliary phase is Li2TiO3 of a monoclinic system structure, a ZnZr(1-x)TixNb2O8 pre-sintered material and a Li2TiO3 pre-sintered material are mixed according to a the weight percentage ratio of (63-67 wt%): (37-33 wt%), and then LMBBA glass accounting for 1.5-2.5 wt% of the two-phasemixed ceramic material is doped as a cosolvent and is sintered at 900 DEG C; and the component of the LMBBA glass is Li2CO3-MgO-Bi2O3-B2O3-Al2O3. The LTCC microwave dielectric ceramic material disclosed by the invention not only has a relatively high dielectric constant and very low microwave dielectric loss, but also has a temperature coefficient close to zero, and has a very high application value in LTCC radio frequency microwave devices.

The invention discloses a preparation method of a low-temperature SCR denitration catalyst based on wolframite smelting slag, relates to the field of environment-friendly catalytic materials, and aimsat solving the problems that the existing SCR denitration catalyst is high in production cost, the tungsten concentrate and tungsten slag treatment process is complex, the treatment cost is high, andhigh-added-value resource utilization of the wolframite smelting slag cannot be realized. The method has the advantages that the SCR denitration catalyst is prepared by taking the waste wolframite smelting slag as the raw material, and based on the efficient denitration performance of manganese oxide and ferric oxide and the characteristic that the wolframite smelting slag is rich in manganese oxide and ferric oxide, the wolframite smelting slag is treated, and then the titanium dioxide carrier is added, the preparation and the synthesis of the denitration catalyst are realized, and high-added-value resource utilization of hazardous wastes is realized. Meanwhile, the prepared SCR denitration catalyst is good in catalytic performance, the removal rate of nitric oxide can reach 95 percent or above, and the denitration performance is excellent.

The invention belongs to the technical field of mineral flotation, and particularly relates to a flotation composite collecting agent and a preparation method and an application thereof. The preparation method comprises the following steps: taking peroxide and hydroxylamine salt as raw materials to prepare a composite collecting agent containing a hydroxamic acid compound and alcohol; the preparation method is wide in raw material source and simple in technological operation, the prepared flotation composite collecting agent has high collecting capacity and selectivity on ilmenite, scheelite,wolframite, cassiterite and other ores, and good flotation indexes are obtained in a flotation test.

The invention provides a tungsten-molybdenum-silver multi-metal ore beneficiation process. The beneficiation process comprises the steps that (1) tungsten-molybdenum-silver multi-metal ores are crushed, grinded and floated to prepare molybdenum rough concentrates; (2) the molybdenum rough concentrates are grinded and selected to obtain molybdenum concentrates; (3) molybdenum floatation tailings are classified and reselected to obtain tungsten-silver mixed concentrates; (4) the tungsten-silver mixed concentrates are grinded; and (5) silver is floated to prepare silver concentrates and tungstenconcentrates. The beneficiation process can prevent excessive grinding and excessive crushing of molybdenite and wolframite to gradually achieve the monomer dissociation to obtain the qualified molybdenum concentrates and tungsten concentrates under the precondition of guaranteeing the recovery rate; the floatation separation is performed after preparation of the tungsten-silver mixed concentratesthrough reselection, so that the ore flotation quantity is reduced, and the use level of flotation medicaments is reduced; and valuable elements of tungsten, molybdenum and silver in the ores can befully recovered to improve the comprehensive utilization rate of resources.