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The heavy medium-re-election-flotation-re-election process used by the plant is shown in the figure below.
FIG flowchart long slope beneficiation plant
Guangxi long slope deposits is a very complex cassiterite - sulphide ore, which has significant mineral industry for more than ten different kinds, mainly cassiterite, iron sphalerite, pyrite, pyrrhotite, arsenopyrite , Jamesonite lead ore, lead ore and other tin stibnite, gangue minerals as quartz, tourmaline, calcite.
According to the selected process flow, firstly, the heavy medium is selected, and 40%~60% of the waste rock in the original ore is discarded in the cyclone, and the heavy product enters the front stage for re-election, and the mixed concentrate (cassiterite and sulfide) is obtained, and then Flotation of sulfur, the product in the tank enters the rear section and re-elected, and the tin concentrate is obtained; the middle and re-selected middle ore and slime in the previous section enter the lean ore system for full floatation and desulfurization, and then re-selection to produce shale tin concentrate; full flotation of sulfide ore Enter the cyanide-free flotation separation system to produce lead-bismuth mixed concentrate, zinc concentrate and arsenic concentrate. Lead-antimony mixed concentrate, preferably divided jamesonite (treated only with metallurgical method), arsenic pyrite (now used as the heavy media plant weighting agent). The flotation conditions and production indicators of the cyanide-free process of the mine are listed in the table below.
Flotation conditions and production indexes of cyanide-free flotation in Dachangchangpo plant
Project
lime
Ammonium persulfate
Copper sulfate
Ding Huang Yao
Pine oil
Flotation agent dosage / kg·t -1
21.5
2.671
0.243
0.405
0.021
Production index /%
The original ore grade contains Sb 2.34, Pb 3.01, lead-bismuth mixed concentrate contains Sb 20.12, Pb 24.72, tailings contain Sb 0.19, Pb 0.3, recovery Sb is 89.49, Pb is 85.7.