39 results about "Chalcocite" patented technology

The invention discloses application of an aminotriazolethione compound serving as a metal sulfide mineral surface modification agent. The aminotriazolethione compound comprises a hydrophilic modification perssad and an aminotriazolethione perssad at the same time. The aminotriazolethione compound mainly serves as the non-molybdenum sulfide mineral surface modification agent for flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral, the hydrophilia of the surfaces of the sulfide minerals with the natural hydrophobicity can be enhanced, especially, the hydrophilia of the surfaces of copper pyrites, chalcocite, galena, blende, brasses, the bismuth sulfide mineral and other non-molybdenum sulfide minerals can be effectively improved, and efficient flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral is achieved.

The invention discloses a friction material for preparing NAO brake pads, which is prepared with the following materials by weight through a conventional brake pad compacting method: 5-15% of ceramic fibers, 5-15% of mineral fibers, 5-10% of resin, 5-10% of chalcocite powder, 10-20% of graphite, 10-20% of barium sulfate, 3-15% of biologically calcified particles, 3-10% of coke, 10-20% of antifriction agents, 5-10% of performance modifying agents, and 10-20% of fillers. The friction material of the invention contains natural biologically calcified particles as fillers, and is used to prepare brake pads together with other raw materials through a conventional brake pad compacting method. According to GB5763-2008, the brake pad is tested as the fourth class on a fixed speed test machine; the friction coefficient is stable; during a temperature increasing period, the friction coefficient is 0.35-0.40, and during a temperature decreasing period, the friction coefficient is 0.33-0.44; the wear rate is low, is stabilized within 0.11-0.25*10-7 / N.m with a maximum of only 0.45*10-7 / N.m which occurs at 200 DEG C; and the national standard is completely reached. By widely used in Santana, Sonata and Jetta taxis, the brake pad has smooth braking and low braking noise, and the life of the friction material is up to above 35000 kilometers.

The invention discloses a process for recovering chalcocite and chalcopyrite with the non-uniform disseminated grain size from high pyritized skarn copper ores. The process for recovering chalcocite and chalcopyrite with the non-uniform disseminated grain size from high-pyrite skarn copper ores is characterized by comprising the steps of first-stage grinding, copper-sulfur mixed flotation, second-stage grinding, rapid copper-sulfur flotation, third-stage grinding and copper-sulfur separation column flotation for recovering fine copper particles. The process adapts to the characteristics of thenon-uniform disseminated grain size and different floatability of chalcocite and chalcopyrite, realizes the recovery of ultra-fine grain disseminated chalcocite and chalcopyrite, avoids the adverse effect of a micro-fine grain ore pulp system on the flotation process, and realizes the efficient separation of refractory high-iron copper ores.

Chalcocite flotation agents are made of the following raw materials including, by weight, 15-18 parts of black powder, 20-24 parts of m-benzenedicarbonyl thiourea, 8-10 parts of drainage oil, 5-7 parts of ethyl alcohol, 2-4 parts of butyl acrylate, 5-7 parts of AEO, 2-4 parts of polyacrylamide, 1-2 parts of chitosan, 0.6-1.4 parts of nanometer titanium dioxide, 1-2 parts of sodium hydroxide, 1-2 parts of sodium hydrogen phosphate, 1-2 parts of boronic acid and 4-5 parts of activating agents. As the nanometer titanium dioxide is added, the chalcocite flotation agents are uniform and stable in dispersion, have stable foam and are good in flocculation effect, good in copper collecting performance, high in copper yield, good in selectivity, good in rejection capability and high in copper grade. The activating agents are stable in dispersion, good in permeability, good in activating performance, long in duration time of the flocculation effect and capable of improving the yield and grade of copper.

The invention discloses a monodisperse Cu9S5 semiconductor nanocrystal and a preparation method thereof and belongs to the technique field of emiconductor nanocrystal synthesis. In the invention, copper salt is taken as a copper raw material, a small amount of other metal salt is doped, and aliphatic series mercaptan is taken as a sulphur raw material, and in a high-boiling-point solvent, a pyrolysis method is adopted to prepare a Cu9S5 semiconductor nanocrystal with good monodispersity. According to the invention, the raw materials are low in price and easily available, the experiment and process are simple, the operation is safe, simple and convenient and the repeatability is good. The Cu9S5 semiconductor nanocrystal prepared by the preparation method in the invention has a diameter less than 5 nanometers, the shape is spherical or rice-shaped, and the crystal form is a rhombohedral system or tetragonal system.

The invention relates to a simple beneficiation method of chalcocite-containing coarse-grain disseminated copper sulphide ore, which is characterized in that graphite is used for replacing a copper selection collecting agent in flash flotation and graded overflow flotation stages to improve the selective adsorption capacity of coarse-grain minerals, a flotation machine for copper selection is changed into a flotation column, and the method comprises the following steps: ore grinding: adding calcium oxide into raw ore a added into a ball mill for ore grinding; grading: grading the ore grinding product b to obtain ore pulp overflow d and ore pulp settled sand c; flash flotation is carried out, specifically, the settled sand c is subjected to flash flotation, especially coarse-fraction ore is directly discharged from a tailing opening, the proper-fraction ore is subjected to flash flotation, graphite and 2 # oil are added, and product copper concentrate 1e and tailings f are obtained; conventional flotation is conducted, graphite, LY01 and 2 # oil are added into the overflow d, and copper rough concentrate j and tailings i are obtained; the rough concentrate j is subjected to flotation column concentration, and product copper concentrate 2 h and middling k are obtained. The method has the advantages that the problems of over-grinding smashing loss, large flotation recovery difficulty, insufficient flotation time and serious tailing running of useful minerals can be solved; and the selective adsorption capacity of coarse-grained minerals can be improved, the system flow is shortened, enrichment of coarse and fine-grained copper minerals is accelerated, and energy consumption is reduced.

The invention discloses application of an aminotriazolethione compound serving as a metal sulfide mineral surface modification agent. The aminotriazolethione compound comprises a hydrophilic modification perssad and an aminotriazolethione perssad at the same time. The aminotriazolethione compound mainly serves as the non-molybdenum sulfide mineral surface modification agent for flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral, the hydrophilia of the surfaces of the sulfide minerals with the natural hydrophobicity can be enhanced, especially, the hydrophilia of the surfaces of copper pyrites, chalcocite, galena, blende, brasses, the bismuth sulfide mineral and other non-molybdenum sulfide minerals can be effectively improved, and efficient flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral is achieved.

The invention provides a beneficiation reagent and method for separating copper-molybdenum mixed concentrates. According to the invention, the effective separation of copper-molybdenum mixed concentrates can be realized by using a concentrated reagent removal and an oxalic acid reduction method, and the oxalic acid reduction method has an effective restraining effect on primary and secondary copper-sulphide ores such as chalcopyrite and chalcocite and the like, the process is simple and reasonable, and the recovery rate of molybdenum is high. The method disclosed by the invention concurrentlyhas the characteristics of good stability, strong adaptability and less reagent consumption, and can greatly reduce the production cost.

The invention discloses a floating method for finely disseminated copper sulfide ores. The floating method specifically comprises steps such as ore grinding, roughing, roughed concentrate re-grinding, roughed concentrate copper-sulfur separating and floating and roughened tailing scavenging, wherein multi-time concentrating and multi-time scavenging are performed on roughened concentrate and roughened tailings, cyclic ore dressing is performed on ores, and different ore dressing reagents are matched, so that the recovery rate of raw ores is increased. The floating method has the advantages that: by optimizing an ore grinding process and reasonably adding a collecting agent and a collecting-foaming agent, surface characteristics of ores are improved, selective adsorption, on copper sulfide ore particle surfaces such as fine-grained copper pyrite and chalcocite, of the collecting agent is strengthened, and hydrophobic agglomeration is formed, so that the recovery rate of copper concentrate is increased by 3-6% in comparison with that of an existing ore dressing method.