8 results about "Fineness" patented technology

The application discloses a soft and dry double-layer composite material, which comprises a bottom layer and a surface layer arranged on the upper portion of the bottom layer, wherein the surface layer has an upper surface and a lower surface, the surface layer is provided with an opening penetrating through the surface layer, the bottom layer is provided with a first protruding portion protruding upward, the first protruding portion penetrates through the opening, the top surface of the first protruding portion is higher than the plane where the upper surface of the surface layer is located, and the fiber fineness of the bottom layer is smaller than that of the surface layer. The application can provide a good soft and comfortable experience for users and improve the dryness of the material.

This invention discloses a flotation process for efficiently separating pyrite from a mixed concentrate containing molybdenum, bismuth, and pyrite, which relates to the field of metal beneficiation technology. Step A: Raw ore sample: concentration 40%-42%, fineness -0.074mm, content 85-90%; the raw ore sample is fed into the flotation tank. Step B: The raw ore sample is sequentially supplemented with 800-1200g / t quicklime, 10-40g / t DY, 100-500g / t water glass, and 0-30g / t kerosene to form a slurry for molybdenum-bismuth desulfurization roughing, yielding a roughing concentrate and roughing tailings. Step C: The roughing tailings from Step B are subjected to three blank scavenging processes. The middlings from Scavenging I are returned to Step B for roughing again; the middlings from Scavenging II are returned to Scavenging I for further scavenging; the middlings from Scavenging III are returned to Scavenging II for further scavenging; the tailings from Scavenging III are used as the final tailings. Step D: The roughing concentrate from Step B is subjected to three cleaning processes to obtain the final molybdenum-bismuth desulfurization concentrate. Each cleaning process involves adding 0-10g / t of quicklime. DY, 0-10g / t kerosene, and 0-100g / t water glass are used to solve the technical problem of separating pyrite from mixed concentrates, which requires large amounts of existing inhibitors and is difficult to separate.

The invention discloses a system and method for reducing the circulating load capacity of a refractory iron ore dry-method pulverizing system, and belongs to the technical field of mineral processing engineering. In order to solve the problems that in the dry-method powder making process of refractory iron ore, due to circulation accumulation of refractory minerals in the system, the load is increased, and a dynamic powder concentrator is prone to swelling, a parallel auxiliary powder grinding subsystem is additionally arranged on the basis of an original system. According to the system, an electric bar valve and a branch pipe are additionally arranged on a coarse-fraction discharge pipe of a dynamic powder concentrator, sorted coarse-fraction materials (0-5 mm) difficult to grind are shunted to a second surge bin, and then are specially ground by second powder making equipment until the qualified fineness that the content of-74 microns is 50% + / -5% is achieved. After being collected by a second cyclone separator, the ground product is conveyed back to the main system by a second air cushion type conveyor; the dusty gas is recycled through the second circulating fan part, and the rest of the dusty gas is connected into the original dust removal system. When the circulation load of the main system exceeds a set threshold value (such as 80% of a design value), the shunt grinding process is started, and when the load is recovered to a normal range (such as below 50% of the design value), the original process is switched back. The circulating load of the system is effectively reduced, the hidden danger of material accumulation of equipment is avoided, and the operation stability of the system and the adaptability to complex ore are improved.

The invention relates to the technical field of gold processing, in particular to a gold surface texture processing method which comprises the following steps: preparing processing equipment, a cutter system, a clamp system, a dust collection system, polishing equipment and ultrasonic cleaning equipment, then cleaning the surface of a gold workpiece to ensure that no oil stain and oxide exist, then loading the workpiece into the clamp system and screwing the workpiece, secondly, a three-dimensional model is imported into software, a tool path with the direction perpendicular to the curved surface is generated, cutting parameters are set, machining is started, the tool abrasion condition is monitored in real time, meanwhile, a dust collection system sucks and collects metal powder generated in the carving process, and finally a finished gold workpiece is taken down. The polishing equipment is used for further polishing and grinding the surface of the gold workpiece, and then the ultrasonic cleaning equipment is used for cleaning the gold workpiece, so that the fineness and the machining speed of the texture on the surface of the workpiece are effectively improved, the original texture and glossiness of gold are kept, regional reflection can be formed, and pollution is avoided.

The application provides a kind of gold-containing material gold extraction performance test method, and relates to gold resource dressing technical field.The method comprises the following steps: grinding the gold-containing material to be tested to a specified fineness, and obtaining parallel samples with uniform gold grade by size reduction;an oxygen-free ore pulp system is constructed;the initial concentration of exogenous gold is calculated according to the material grade and the preset leaching rate, and an oxygen-free exogenous gold cyanide solution matching the industrial conditions is prepared;two groups of parallel tests, pure adsorption group and activated carbon synchronous competition group, are set up, and the reaction is carried out synchronously under the same oxygen-free condition until adsorption equilibrium;the gold grade of the original ore sample and the two groups of test ore samples are measured respectively;the total adsorbed gold amount, irreversible gold extraction amount, reversible adsorbed gold amount and irreversible gold extraction rate are calculated according to the test analysis results, and the gold extraction performance test is completed.The systematic interference of gold leaching from the ore itself is eliminated from the root, and the method is suitable for accurate evaluation of gold extraction performance of various gold-containing materials such as gold ore, gold concentrate, roasted slag and oxidized slag.

The invention provides a method and equipment for extracting and recovering tantalum and niobium metals from lepidolite tailings, and relates to the technical field of metal material recovery, the method comprises the following steps: step S1, the tailings are crushed and ball-milled to a certain fineness; s2, tantalum-niobium minerals in the tailings are preliminarily enriched through a gravity concentration method, and roughed tantalum-niobium concentrates and roughed tailings are obtained; and S3, primary scavenging is conducted on the roughing tailings through a high-gradient magnetic separation method, and roughing tantalum-niobium concentrate and magnetic separation tailings are obtained. According to the scheme, the tantalum-niobium concentrate with the grade larger than 18% and the recovery rate larger than 40% is finally obtained after the tantalum-niobium concentrate with the primary shaking table and the tantalum-niobium concentrate with the secondary shaking table are evenly mixed, and a certain amount of valuable metal elements such as tantalum and niobium are contained in the lepidolite tailings; by means of the method, the originally abandoned rare metals can be recycled, resource waste is reduced, and the comprehensive utilization rate of mineral resources is increased.

This invention relates to a mineral processing method for improving the copper metal recovery rate of quench slag using slow-cooling slag. The method includes the following steps: (1) after crushing the slow-cooling slag, wet-milling it to a fineness of 60%~65%-325 mesh, and then performing copper flotation to obtain slow-cooling slag flotation copper concentrate; (2) after crushing and wet-milling the quench slag, adjusting the slurry, and sequentially adding sodium sulfide, butyl xanthate, and 2 # (2) The oil is subjected to coarser-grained copper mineral flotation to obtain copper rough concentrate I and primary rougher tailings; (3) The primary rougher tailings are concentrated and slurry-adjusted, then ground, and sodium sulfide is added first, followed by slow-cooling slag to float the copper concentrate for a second rougher, to obtain fine-grained copper rough concentrate II and secondary rougher tailings; (4) Copper rough concentrate I and copper rough concentrate II are combined and subjected to two cleaning processes to obtain copper concentrate and middlings from each cleaning process; (5) The secondary rougher tailings are slurry-adjusted and then added to slow-cooling slag to float the copper concentrate for copper mineral scavenging, to obtain scavenged middlings and scavenged tailings. This invention has a high copper recovery rate, simple operation, and strong process applicability.

The invention provides a silver ore flotation process, which belongs to the technical field of ore dressing, and comprises the following steps: 1) grinding and grading: carrying out two-stage continuous grinding and grading on ore to be treated to obtain qualified materials with the fineness of-0.074 mm accounting for 70-80%; (2) primary flotation is conducted, specifically, the qualified materials are subjected to primary open-circuit roughing, and primary roughing concentrate and primary roughing tailings are obtained; (3) secondary flotation is conducted, specifically, secondary roughing, secondary scavenging and primary concentration are conducted on the primary roughing tailings, and concentrated concentrate and flotation tailings are obtained; and 4) concentrate integration: mixing the fine concentrate with the primary roughing concentrate to obtain the silver concentrate. According to the technology, the silver concentrate is obtained in the mode of combining rapid flotation and common flotation, the concentrate with the high grade is moved out of a flotation system in time, the whole set of flotation technological process is simple, the flotation selection grade and concentration are stable, operation and control are easy, control is convenient, the production cost is reduced, the beneficiation recovery rate is larger than 85%, and the beneficiation technical index is improved.