Method of treating copper oxide ore, the main categories:

(1) Fluoride flotation method after vulcanization. In this method, the oxidized mineral is first vulcanized with sodium sulfide or other vulcanizing agent (such as sodium hydrosulfide), and then the higher xanthate is used as a collector for flotation. When vulcanizing, the lower the pH of the slurry, the faster the vulcanization proceeds. The vulcanizing agent such as sodium sulfide is easily oxidized and has a short action time. Therefore, when the copper oxide is floated by a vulcanization method, the vulcanizing agent is preferably added in stages. Ammonium sulfate and aluminum sulfate contribute to the vulcanization of oxidized minerals. Therefore, the addition of these two agents during the flotation flotation can significantly improve the flotation effect, the copper oxide minerals which can be treated by the vulcanization method, mainly copper carbonates, such as Malachite, azurite, etc. can also be used for flotation of copper ore. However, if the malachite is not specially treated in advance, its vulcanization effect is very poor, and it cannot even be vulcanized.

(2) Fatty acid flotation method. This method, also called direct flotation, when using fatty acids and soaps as collector flotation agent, useful to add inhibitors gangue silicate, phosphate and carbonate slurry adjusting agent and the like. Fatty acid machine soaps can well float malachite and azurite. The test results of fatty acid flotation of malachite with small hydrocarbon chains show that the fatty acid has a good ability to capture malachite as long as the hydrocarbon chain is long enough. is, within a certain range, the stronger the collector capacity, the less amount of the agent, is only applicable to direct flotation of copper oxide carbonate gangue not, and when a large number of homes gangue iron, manganese minerals, the Its indicators will get worse.

(3) Special collector method. For the flotation of copper oxide ore, in addition to the above two types of collectors, other special collectors may be used for flotation and sometimes mixed with xanthate to increase the recovery rate of copper.

(4) Leaching-precipitation-flotation method. Due to the variety of copper oxide ore, some floatable parts are good, some are poorly floatable, and some are

Copper oxide was easily dissolved certain acids, bases, so there will be a refractory oxide soluble copper was first made and then replaced with iron, copper metal precipitates, then the precipitate float flotation of copper with an acid . The technical conditions are sought to: finely grind the ore to monomer separation according to the ore inlay size. For leaching with 0.5%-3% dilute sulfuric acid solution, the amount of acid must change with the nature of the ore.

The low, 2.3-11 kg / t high can reach 35 -45 kg / t. The precipitated copper flotation is carried out in an acidic medium (pH 3.7--4.5), the collector cleavage cresol black or double xanthate, the undissolved copper sulphide mineral and the precipitated metallic copper Come up. The method is suitable for the treatment of difficult-to-float minerals such as chrysocolla, or a refractory copper oxide ore with a very high mud content.

(5) Separation-flotation method. This method is to chlorinate the copper oxide ore and to roast it. The surface of the mineral or mineral is reduced to a metal copper that is easy to float, and then the yellow medicine is used as a collector for flotation.

The method is suitable for treating copper oxide minerals with more difficult to choose mud and more than 30% of ore combined with copper oxide. When comprehensively recovering gold, silver precious metals and other rare metals, this method is superior to leaching flotation.

(6) Flotation water smelting method. Many copper oxide ore and mixed copper mines are more or less partially refractory and have some

It is easy to choose. In this case, the easy-to-select oxidized ore is first recovered by flotation, and then the tailings or medium ore is fed into the smelting.

Flotation example of copper oxide ore

The middle part of a ore body is iron-copper ore, and the transition zone of the ore is copper ore. Its main metal sulfide minerals are chalcopyrite, porphyrite, pyrite, and chalcopyrite. The main metal oxide minerals are magnetite, hematite, natural copper and malachite: minor minerals are pyrite, flash zinc ore, tennantite, silver gold, azurite, cuprite, goethite, hematite and limonite like. Gangue minerals calcite, dolomite, quartz, chalcedony, diopside, serpentine, kaolin, chlorite, sericite, and the like.

The ore oxide ore is high in copper and iron, has a deep oxidation degree and a large mud content, and has a high copper binding rate. The consumption of a single flotation agent is large and the selectivity is poor, and it is difficult to obtain satisfactory results. The ore is flocculated with copper minerals after vulcanization at normal temperature, and the magnetic separation iron concentrate is used for flotation tailings. Its indicators are: copper concentrate contains 18.10% copper; copper recovery rate is 89.10%. Iron concentrate contains 66.80% iron and iron recovery rate is 65.30%.

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