77results about How to "Good sorting index" patented technology

The invention relates to a method for refining iron and removing phosphorus from complex refractory high-phosphorus iron ore, in particular to a method for sorting high-phosphorus iron ore by combining microwave reduction roasting and low intensity magnetic separation, and belongs to the technical field of mineral processing, particularly iron ore beneficiation. The method comprises the following steps: crushing refractory high-phosphorus iron ore used as raw material into granules with granularity of less than 2mm; mixing the crushed raw ore with a fluxing agent and a reducing agent in a certain proportion; transferring the obtained mixed material into a microwave reaction furnace for reduction roasting; and carrying out water-quenching, cooling, ball-milling and wet-magnetic-separating on the obtained roasted ore to finally obtain iron ore concentrate. In the method, the ore is reduced by utilizing a microwave roasting technology, wherein microwave reduction roasting time is short, and the temperature of the ore is raised quickly; and meanwhile the fluxing agent is added so as to promote gangue softening and improve refractory ore structure together with microwave roasting reaction. By utilizing the method for sorting the high-phosphorus iron ore, the iron ore concentrate with grade of more than 58.39% can be obtained, and phosphorus removal rate reaches over 70.44%, thus a new technique is provided for sorting the high-phosphorus iron ore.

The invention relates to a flotation method for lead and zinc ore difficult to select. The method includes the following steps of lead roughing, two-time lead scavenging, three-time lead fine selection, zinc roughing, two-time zinc scavenging and three-time fine selection. Lime serves as regulators, zinc sulfate and sodium sulfite serve as zinc inhibitor, diethyl dithiocarbamate and ethyl xanthogenate serve as lead collecting agents, copper sulfate serves as zinc activating agents, ammonium dibutyl dithiophosphate serves as zinc collecting agents, and terpenic oil serves as foaming agents. The lead and zinc ore difficult to select is processed by the adoption of lead differential flotation and zinc selection technological processes, and the practical problems that in original technological processes, zinc contains a high content of lead which contains a high content of the zinc, and the lead recovery rate and the zinc recover rate are low are solved. The technological processes are simple, reliable, easy to operate, and good in sorting index. Compared with the original technological processes, the method has the advantages that under the circumstance that raw ore contains the same lead and zinc, mutual containing of the lead and zinc is reduced, and the lead recovery rate and the zinc recovery rate are greatly increased and increased by 9.29% and 9.05% respectively.

The invention relates to a beneficiation method for improving the ore dressing recovery percentage of copper sulfide ore hard to dispose. By applying the method, flotation separation of copper sulfide mineral from hydrophobic silicate gangue talc and ferric sulfide mineral pyrite can be realized, and the preparing technical indexes of copper sulfide mineral can be improved. The method comprises the operations of ore grinding, size mixing, rougher flotation, scavenging and selection. According to the invention, a combined inhibitor TYZ01 has a selective inhibiting effect on talc and pyrite and cannot affect the flotation of copper pyrites, and a combined collecting agent TBS02 has strong collecting capability on copper pyrites; by using the two combined reagents, efficient utilization of copper sulfide mineral containing hydrophobic silicate gang and pyrite can be realized; proved by practices, by using the beneficiation method disclosed by the invention, good selection indexes can be obtained; and the adopted reagents, calcium lignosulfonate and Arabic gum, are organic macromolecule reagents, thus being easy to degrade and having no pollution to the environment.

The invention provides a mineral separation process and system for an ultra-lean magnetite ore. The mineral separation process for the ultra-lean magnetite ore comprises the following steps of sequentially carrying out coarse crushing, intermediate crushing and fine crushing on a raw magnetite ore to obtain a fine-particle ore; carrying out dry magnetic separation on the fine-particle ore, and throwing tailings to obtain a dry concentrate; and carrying out wet grinding and separation on the dry concentrate. The dry pre-separation step is additionally arranged in the mineral separation process, so that the technical problems of high ore grinding and magnetic separation energy consumption, high cost, high mineral separation water consumption, tailing pond construction and the like are solved.

The invention relates to a post-type tungsten selecting method, wherein it uses two cyclone-static foam float selecting posts as selecting devices, with three slurry barrels, liquid level controller and mine circulator. It first feeds the mine into slurry barrel, adds float select agent to mix the slurry; feeds the slurry via feeding pump to the rough float selecting post to be separated and selected; then the rough selected and fine selected mines flow into the fine selecting float selecting post, and the rough selected mine is discharge at the bottom of rough selecting float selecting post, to be selected in the fine selecting post; and the fine selected mine is discharged at the upper fine mine outlet, and the tail mine is discharge at the bottom outlet into mine buffer pool, to be fed back to the slurry barrel. The invention has low cost and high efficiency.

The invention discloses a chemical metallurgy method for extracting beryllium oxide from chrysoberyl. The chemical metallurgy method is a comprehensive treatment technology for carrying out chemical metallurgy on refractory chrysoberyl with not more than 0.5% of Be. The chemical metallurgy method is characterized by comprising the following steps of: carrying out structural transformation roasting on the minerals by using ammonium fluosilicate as a structural transforming agent in the presence of activator limestone; cooling the roasted minerals and using water to spray dump leaching beryllium; precipitating beryllium for the ammonium fluoroberyllate solution by using ammonium bicarbonate to obtain basic beryllium carbonate; calcining the basic beryllium carbonate to release carbon dioxide and water vapor to obtain the product beryllium oxide; and concentrating and crystallizing a beryllium-precipitated solution which is the beryllium fluoride solution under reduced pressure, and drying the concentrated and crystallized solution in air flow to obtain the product ammonium fluoride. The chemical metallurgy method disclosed by the invention is simple in process, low in price, free of pollution, high in metal recovery rate, low in production cost and capable of effectively separating and extracting beryllium in the chrysoberyl.

The magnetic rocker comprises the bracket with bed head and surface which sets mineral and water supply grooves, magnetic bearing mechanism along the direction of the bed with magnetic system set on the magnetic bearing mechanism. The introduction of compound force field solves the serious issue of mixture, increasing selection efficiency, improving selection index. It meets special requirement for magnetic mineral and non-magnetic mineral separation and nonmetal equipment requirement except iron ones.

The invention discloses a beneficiation method for recovering pyrites from coal gangue. The method adopts the following processes: (1) the coal gangue is classified by a double-layer vibrating sieve after crushing; classified coarse products are separated by a heavy-medium vibrating chute to obtain concrete products and tailing; and after mediums are removed from the concentrate products, coarse pyrites are obtained; (2) classified intermediate products are separated by an ore sand shaker to obtain intermediate pyrites and tailing; and (3) classified fine products perform the ore grinding classification, the sludge removal, the flotation and the separation to obtain coal and pyrite products and tailing. The method crushes the coal gangue to divide into different coarse and fine particle grades; the coarse particle grade adopts the heavy-medium vibrating chute with relatively lower production cost to separate out coarse gangue minerals so as to reduce the direct ore grinding cost; and in particular, the method is suitable for the coal gangue with nonuniform embedding particle size, can greatly improve the recovery rate of the pyrites, and synchronously extracts other valuable elements in the separation process to increase the additional value.

The invention relates to a valuable mineral recovery process of tailings, in particular to a flotation process for recovering micro-fine particle mica from micro-fine particle iron separation tailings. According to the process, fine particles are removed by one-time grading operation; the flotation process is formed by one-time roughing, five-time concentration and one-time scavenging; middlings are selected, merged and subjected to dehydration, concentration and reagent removal treatment respectively; in the regime of agent, a combined regulator, a mixed inhibitor and a mixed collecting agentare used; the state of an obtained ore pulp is fully adjusted, the lower limit of the floatable granularity of mica minerals reaches 0.025 mm, high-quality mica concentrates are obtained, the yield of the mica concentrates is larger than or equal to 11.86%, the content of mica in the mica concentrates is larger than or equal to 97.21%, and the recovery rate of the mica is larger than or equal to48.25%. The mica recovery rate is high, the valuable mineral resource recovery efficiency is improved, and economic benefits are brought to enterprises.

The invention discloses a collector for bauxite direct flotation desilicification and an application method of the collector. The collector is characterized by comprising the chemical component of a mixture of monocarboxyl fatty acid, an organosilicon surfactant, a polyoxyethylene ether surfactant and a mining foaming agent, wherein the compounding mass percents of the monocarboxyl fatty acid, the organosilicon surfactant, the polyoxyethylene ether surfactant and the mining foaming agent are 70-80%, 5-10%, 5-10% and 10-20% respectively. The collector has the obvious advantages that by adding the surfactants without collecting ability, the dispersing performance of the fatty acid collector is improved, the collecting performance of the fatty acid collector is improved, recovery of aluminum oxide is improved, and the use quantity of medicaments is reduced; on the condition of not conducting desliming, the flotation effect of diaspore bauxite with a medium and low alumina-silica ratio (2.5-5) is prominent.

The invention provides a reprocessing method of tin flotation rough concentrate. The reprocessing method is characterized by comprising the steps of reselecting and reprocessing to recover the tin flotation rough concentrate through efficient centrifugal equipment, and returning the acquired reselected ores into a tin flotation system. According to the reprocessing method provided by the invention, the tin flotation rough concentrate can be recycled to meet the indexes that the final concentrate grade is 40%, the operation recovery is above 70%, and the raw ore of a concentrating plant is above 11% by the efficient centrifugal equipment; furthermore, after the efficient centrifugal equipment and the flotation system are closed, middlings can be directly returned to the tin flotation system, so as to prevent the loss of intermediate products.

The invention provides a beneficiation method for barite rich in calcite and witherite. According to the beneficiation method, the problem that the quality of flotation concentrate is poor due to thefact that the floatability of gangue minerals such as the calcite and fluorite is similar to that of the barite is solved. The beneficiation method is characterized in that acidified sodium silicate is adopted for inhibition and dispersion so that separation of the barite from the gangue minerals can be well realized; and a combined collecting agent composed of sodium oleate and sodium dodecyl sulfate is selected, so that relatively strong collecting capacity and good selectivity on the barite and the witherite are realized. According to the beneficiation method, barite concentrate with the relatively high recovery rate can be obtained, the quality of the concentrate meets the requirements of national standard first-grade products of drilling grade barite powder, and the barite ores rich in the calcite and the witherite can be developed and utilized.

The invention relates to a high-yield two-product mixed maghemite beneficiation process. The high-yield two-product mixed maghemite beneficiation process comprises three-section breakage including coarse breaking, medium breaking and fine breaking on mixed maghemite, and is characterized by further comprising the following steps: sieving operation, a one-section closed circuit grinding operation implemented by a one-section ball-milling-cyclone, primary beneficiation operation, coarse and fine classification operation, reselection operation, secondary magnetic separation operation and centrifuging operation; a primary magnetic separation operation sieve treats overflow products of one-section closed circuit grinding operation, sieving operation and undersizes, the coarse and fine classification operation treats bulk concentrate obtained by primary beneficiation, the reselection operation treats coarse grain products of the coarse and fine classification operation, the secondary beneficiation operation treats coarse particle products of the coarse and fine classification operation, and the centrifuging operation treats bulk concentrates of secondary weak magnetic separation. The high-yield two-product mixed maghemite beneficiation process has the advantages that iron ore concentrates I with grade being 62% for pelletizing raw materials and iron ore concentrates II with grade being 58% for sintered raw materials can be selected out.

The invention relates to the technical field of magnetic separators, in particular to a wet magnetic separator groove body (1). The wet magnetic separator groove body comprises an ore feeding space (2), a separation space (5), a tailing discharging space, a concentrate conveying space (14) and a liquid level adjusting mechanism (16), wherein the liquid level adjusting mechanism (16) is used for adjusting the ore pulp liquid level height in the groove body (1). The wet magnetic separator groove body (1) with the liquid level adjusting mechanism (16) has the characteristics of adaptability to higher fluctuation of an ore feeding amount and adjustable ore pulp liquid level height in the groove body; the matching relation between the height of the separation liquid level and the ore feeding amount is the best. At the same time, the invention also provides the ore feeding space (2) with a pre-magnet (3) and the separation space (5) with a step groove body structure. The magnetic ore catching probability can be effectively improved; ore pulp is prevented from precipitating; and crude ores do not sink into the groove to block the groove at the same time, so that the best working condition is achieved.

The invention discloses a simple and efficient dry magnetic separation method. A magnetic separation component adopted by the method comprises a magnetic body, a partition plate and a tailings receiver, wherein a selection space is constructed by the partition plate and the tailings receiver; and a selection medium is air. According to the method, firstly, to-be-selected ore powder acts on the other side of the partition plate under the action of the magnetic body to generate magnetic aggregates and a magnetic chain; the magnetic body moves on the fixed partition plate in a reciprocating manner, so that the separation time is prolonged; the ore powder generates 'exclusion action' and 'throwing-off action'; the magnetic selection grading capacity is obviously improved. When the simple and efficient dry magnetic separation method is applied to treatment of 70%-86% of iron ore of which the iron grade is 27.36%-49.58% and the granularity is less than 75 microns, iron concentrate of which the iron grade is greater than or equal to 59.85% and the iron recovery rate is greater than or equal to 73.52% is obtained; and the selection indexes of existing dry magnetic iron ore are greatly improved.

The invention discloses a spodumene particle-size double-dense-medium-flotation benefication method, and belongs to the technical field of mineral machining. The method adopts two sections of crushingflow; through screening (or classification) treatment, high-density dense medium separation and low-density dense medium separation, thick-particle spodumene concentrate products and fine-particle spodumene concentrate products are obtained; cyclone overflowing products are concentrated for ore grinding; a cyclone is used for mud removal; and sunk sand enters the flotation operation to obtain fine-particle spodumene concentrate products. The method has the advantages of high adaptability, low production cost, capability of obtaining the concentrate products with different particle sizes and reduction of the crushing and ore grinding energy consumption and the medicament use level.

The invention discloses a method for sorting low-grade titaniferous magnetite. The method includes the steps that an intermediately-crushed material is fed into dry-type magnetic separation operation,and dry-type magnetic separation tailings are discharged; dry-type magnetic concentrate is subjected to primary ore grinding, weak magnetic roughing and weak magnetic selection, and magnetite concentrate with the iron ore concentrate grade being larger than or equal to 60% is obtained; weak magnetic roughing and weak magnetic selection tailings are combined into ilmenite beneficiation ore; the ilmenite beneficiation ore is subjected to primary strong magnetic separation at first, obtained primary strong magnetic concentrate is fed into secondary ore grinding, secondary strong magnetic separation and weak magnetic separation deironing operations, secondary strong magnetic separation tailings are thrown out, and weak magnetic separation deironing products are discharged; and weak magnetic separation deironed tailings serve as titanium flotation ore, the one-roughing, four-selection and one-scavenging direct flotation process that middlings can return in sequence is adopted in titanium flotation, flotation scavenging tailings are thrown out, and titanium concentrate with the TiO2 grade being larger than or equal to 46% is obtained. The method for sorting the low-grade titaniferous magnetite has the advantages of being good in energy-saving effect, large in handling capacity, high in adaptability, high in comprehensive utilization rate, good in economic benefit and the like, and can be applied and popularized to similar mines.

The invention discloses a mineral processing process for improving the quality and reducing silicon of iron ore concentrate. The process comprises the following steps: finely grinding raw ores to obtain ore powder or ore pulp of which the ore powder or ore pulp with the granularity of 325 meshes accounts for 80%, performing magnetic separation by using a 800-1000T magnetic separator to obtain a section of inferior fine magnetite concentrate and a section of inferior magnetic tailing, performing magnetic separation on the section of inferior magnetic tailing by using a 10000-14000T magnetic separator to obtain a section of high fine magnetic concentrate and a section of high magnetic tailing, performing magnetic separation on the section of inferior fine magnetite concentrate by using a 800-1200T magnetic separator to obtain two sections of inferior fine magnetite concentrate and two sections of inferior magnetic tailing, feeding back the two sections of inferior magnetic tailing to an ore grinding procedure for fine grinding, and performing magnetic separation on the section of high fine magnetic concentrate by using a 6000-10000T magnetic separator to obtain two sections of high fine magnetite concentrate and two sections of high magnetic tailing; and combing the two sections of inferior fine magnetite concentrate and the two sections of high fine magnetite concentrate to obtain total fine concentrate, and combining the section of high magnetic tailing and the two sections of high magnetic tailing to obtain total tailing. By adoption of the process, the grade of the iron ore concentrate can be increased by about 8.5%, the grade of a silicon product can be reduced by about 6.5%, the fineness of the iron ore concentrate can be improved, the abrasion of a conveying pipeline can be reduced, and the process is short in process procedure, low in operation cost and applicable to industrial popularization and application.

The invention provides a process method for separating talc and chalcopyrite through a three-step method and a collecting agent used in the process method. The method comprises the steps of carrying out ore grinding, carrying out first-step roughing, carrying out second-step concentration, and carrying out third-step table reselection and regrinding operation. The process method aims at separationof the talc and the chalcopyrite, the preferential copper separation technological process is adopted for the first time under the condition that a special-effect talc inhibitor is not added, and effective separation of the talc and the chalcopyrite is achieved. According to the process method, the collecting agent TB-1 formed by mixing isobutyl xanthate propionitrile ester, N-allyl-O-alkyl thiocarbamate and Spans type sorbitan ester is adopted to strengthen flotation of the chalcopyrite, the thickness of a foam layer is adjusted through the defoaming performance of the collecting agent TB-1,and the relative floating speed of the talc and the chalcopyrite is changed; and the flotation and reselection combined technological process is adopted, and effective separation of talc and chalcopyrite is achieved through three steps. The flotation reagent adopted in the process method has the characteristics of low toxicity or no toxicity, environment friendliness, good effect and the like, and an environment-friendly and high-efficiency process method for separating the talc and the chalcopyrite is provided.