The Floatation Process Of Jamesonite And Marmatite Has Been Changed In Chehe Concentration Plant

The flotation separation of Dachang cassiterite-lead-tin-zinc multy-metal sulphideore has been systematic studied in this paper. Flotation behavior of jamesonite, marmatite, pyrrhotite and pyrite in 92# ore are researched in different condition of reagents. On the basis of that, minitype flotation test circuit is formed and proof test are precede by designing flotation circuit and preliminary screening combination agents and depressor.The flotation behavior of jamesonite, marmatite, pyrrhotite and pyrite is found out:the four minerals all have good flotation capability in acidic conditions; With a pH that is greater than 7 the flotation capability to the four minerals becomes very bad. The result also shows that lime can depress jamesonite easily but has little effect on marmatite and certain action on pyrrhotite and pyrite. The new depressant CH-1 and CH-2 have great effect on pyrrhotite and pyrite. To marmatite, pyrrhotite and pyrite which adsorping xanthate and activated by Cu2+, Pyrrhotite and pyrite can be depressed effectively by lime and CH-1.Chehe plant of Liuzhou tin group adopt non-cyanoge flotation technique to disposal lead-tin-zinc sulphideore of Dachang after the monographic research of non-cyanogen technique, and two problems will be solved, the one is:flotation separation between Pb-Sb sulphideore and zinc sulfide ore (marmatite), pyrites (pyrrhotite and pyrite); the another is:flotation separation of Zn and S. Flotation of slurry and sand are carried out respectively on the basis of Pb-Sb-Zn-S bulk flotation. Remill Zn-S mixed concentrate of sand sample, merge it with Zn-S mixed concentrate of slurry sample, and then separate Zn-S. Close-circuit test results is: the grade of Zn and Pb are 44.89%,0.16% respectively in zinc concentrate, and the recovery of Zn is 82.59%; While the grades of S, Sn, Pb, Zn are 27.98%,0.29%,0.28%,0.35%respectively in the tailings of Zn-S separation flotation. Proof test shows that in the present ore slurry of minitype close-circuit, grades of 20.76% for Pb,19% for Sb,0.95% for Zn and metal recovery of 69.78% for Pb in lead concentrate, grades of 46.95% for Zn,0.19% for Pb and metal recovery of 92.41% for Zn in zinc concentrate can be obtained by flotation technique without cyanoge.The results of thermodynamic study shows that:in high pH and high potential condition, it's easy to form hydrophilic substance on the surface of jamesonite, marmatite, pyrrhotite and pyrite; While in low potential acid condition, the surface is mainly covered with hydrophobic substance. On the surface of jamesonite, butyl xanthate and butylamine dithiophosphate can form collector metal salt while can't be easy in high pH and high potential condition. On the surface of marmatite and pyrrhotit, butyl xanthate and butylamine dithiophosphate can form hydrophobic substance mainly of dimer while can't be easy in basicity condition.