Process for performing sulfide ore flotation by using liquid carbon dioxide
A liquid carbon dioxide and sulfide ore technology, applied in the field of comprehensive utilization of resources, can solve the problems of uneven mineralization, insufficient flotation time, troublesome flotation column maintenance, etc., and achieve high mineralization effect, not easy to block, and low energy consumption. Effect
Active Publication Date: 2013-02-13
CENT SOUTH UNIV
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Problems solved by technology
At present, the general flotation column uses the bubbles generated by the foamer to mineralize inside the flotation column, which may easily lead to uneven mineralization and insufficient flotation time.
And once the foamer has problems such as blockage and wear, the maintenance of the flotation column will be very troublesome
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0012] see figure 1 , the liquid carbon dioxide 1 is passed into the flotation column 3 through the pressure reducing valve 2 through the air inlet 4 together with the flotation pulp entering through the feed port 5, the liquid carbon dioxide 1 is vaporized, and bubbles grow on the surface of the hydrophobic ore particles, The air bubbles generated in the flotation column 3 and the magnetic air bubble generator 6 are reversely collided to realize sulfide ore flotation.
[0013] Using the method of the present invention, a sulfur separation test was carried out on a certain sulfide ore in Hunan. The sulfide ore is tailings after lead-zinc flotation, the main minerals are pyrite, including pyrite, pyrrhotite, etc., and the gangue minerals are mainly carbonate and silicate minerals. During flotation, the mass concentration of ore pulp is 32-34%....
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The invention discloses a process for performing sulfide ore flotation by using liquid carbon dioxide. The process aims at the problems that in the sulfide ore flotation, because sulfide ores are easy to be crushed and overground and air bubbles can collide with mineral grains of the sulfide ores difficultly, the flotation and collection effects are not good. The flotation process adopting the liquid carbon dioxide comprises the following steps of: introducing the liquid carbon dioxide (1) together with a flotation pulp entering from an air inlet (4) and a feed opening (5) into a flotation column (3) through a pressure reducing valve (2); performing carbon dioxide gasification; growing air bubbles on the surfaces of hydrophobic ore grains; and performing adverse impact with the air bubbles generated by a magnetic bubble generator (6) in the flotation column (3) so as to achieve the flotation of sulphide. The method achieves that ore pulp is mineralized sufficiently and evenly in the flotation column, has enough flotation time, large air bubble quantity, superfine sizes, uniform dispersion, good flotation and collecting effect, no pollution and the like, and the method can be used in the fields of metal mines, chemical engineering, environmental protection and the like.
Description
technical field [0001] The present invention relates to a method for using carbon dioxide in sulfide ore flotation process, in particular to a method of passing liquid carbon dioxide into sulfide ore flotation slurry, using the bubbles generated by a magnetic bubble generator to realize sulfide in the flotation column The invention discloses a new method of ore flotation, which belongs to the technical field of resource comprehensive utilization. Background technique [0002] carbon dioxide (CO 2 ) as a common gas, due to its wide source, low price, and very weak chemical activity, it can be used as a protective gas and applied in technical fields such as metallurgy and chemical industry. In the field of sulfide ore flotation, carbon dioxide itself can be used as a flotation agent to adjust the sulfide ore flotation pulp, and in some easily oxidized sulfide ore flotation, carbon dioxide can be used as a protective gas to isolate oxygen . But in the current flotation proce...
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IPC IPC(8): B03D1/02
Inventor 孙伟胡岳华耿志强
Owner CENT SOUTH UNIV