| China’s tungsten polymetallic ore has the problem of complex properties, low grade,difficult separation, causing erosion of associated sulfides resources. With the continuousconsumption of resources, study on the comprehensive recovery of resources is attachingpeople’s more and more attention. In this paper, a tungsten polymetallic in Guangdong wastaken as the research object, and associated tungsten sulfide ore comprehensive recoverytechnology was studied. Aiming at the existence of unavoidably ion in tungsten, the influenceof sulfide mineral flotability was explored, which provides theoretical guidance for the oredressing, and a reference for other tungsten polymetallic sulfide ore dressing.Processing mineralogy was used to find out metal mineral for recovery of the tungstenpolymetallic in Guangdong, and the factors of influencing comprehensive recovery oftungsten and associated sulfide ore was studied. The results show that valuable metals in theore are various, but its content is low. Each mineral has different disseminated granularity, andcontain many gangue minerals containing calcium, which belongs to low grade tungstenpolymetallic difficult to choose.In allusion to tungsten polymetallic ore having Ca2+, Mg2+and CO2-3, the inference of theion on floatability of ion of chalcopyrite and pyrite was studied through the use of soluble saltsolution to simulate actual pulp condition. Test shows that under the butyl xanthate flotationsystem, chalcopyrite is barely influenced by Ca2+, Mg2+and CO2-3, and floatability of pyritedecreased significantly with the increase of Ca2+,Mg2+concentration. Under the condition ofalkaline, inhibition ability of Ca2+isenhanced; Pyrite itself is not affected by CO2-3. Under thealkaline environment caused by hydrolysis of CO2-3in the actual test, its floatability declinedwith the increase of the concentration of CO2-3.On the basis of determining sulfide ore comprehensive recycling process, associatedsulfide ore mixed flotation condition has been studied systematically by flotation test. Underthe optimum reagent regime, ultimately copper concentrate containing copper17.56%, copperrecovery of58.08%; Bismuth concentrate containing bismuth20.12%, bismuth recovery of38.23%; Sulphur concentrate containing35.21%, sulfur recovery rate of60.09%.Characteristic of gangue nature in the tungsten is analyzed, then using the room temperatureroughing and ten heating to concentrate and join selected sodium silicate and sodium sulphidein the heating, tungsten concentrate was obtained, containing grade of60.35%tungsten,tungsten recovery of56.33%. By energy spectrum analysis, flotation solution chemical calculation and ultravioletspectrum test, floatation mechanism research of pyrite was carried out in the system of Ca2+and Mg2+. The results show that the Ca2+and Mg2+has reacted with pyrite surface; In therange of pH<10, the main components in the slurry is Ca2+and Mg2+, and other hydrolysis ofcomponent does not exist; Ca2+and Mg2+did not react with butyl xanthate itself. By the formof the metal ions, it is indicated the reason why Ca2+and Mg2+restrain pyrite is that Ca2+andMg2+bond with pyrite lattice, adsorpt in the surface of pyrite, or generate hydroxideprecipitation in the surface, thus the flotability of pyrite surface is reduced. |
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