How many of the four flotation methods do you know about antimony gold ores?

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Antimony gold ore is one of the important minerals for obtaining gold. In addition to stibnite, the main target minerals in this type of minerals also include natural gold, pyrite, and arsenopyrite. Pyrite and arsenopyrite are the main minerals. Gold minerals, according to the characteristics of this type of gold mineral ore (fine particles embedded in the material), gold is often extracted by flotation.So antimonyGold mine flotation extractionWhat are the methods? Let’s find out together!

1.Sodium hydroxide flotation gold extraction method

In this method of gold extraction, sodium hydroxide is first added to a ball mill, and the stibnite is initially suppressed by grinding in a ball mill in a strong alkali slurry, and then copper sulfate is used to activate pyrite and arsenopyrite, and the pH value of the slurry is adjusted to After 8-9, the collector and foaming agent are added to float out the pyrite and arsenopyrite first, and the gold is obtained into concentrate. Lead salt or copper salt is added to the obtained tailings to activate the stibnite, and then the collector is added. The collector and frother are flotated to obtain antimony concentrate.

2.Sodium sulfide + sodium hydroxide flotation gold extraction method

The gold extraction method of sodium sulfide + sodium hydroxide (sodium carbonate) flotation is to add sodium hydroxide and sodium carbonate to the grinding ore, and then add lead acetate, copper sulfate, butyl xanthate and sulfuric acid in sequence to perform mixed flotation. Then the antimony-gold mixed concentrate and tailings are obtained. The mixed antimony gold is regrinded. During the process, sodium hydroxide, butyl xanthate, copper sulfate, etc. are added. After being fed into the flotation machine, it is inflated to complete the flotation separation operation. Finally, the coarse gold concentrate is obtained, and the Antimony concentrate. In order to further extract gold concentrate, sodium sulfide-sodium hydroxide is used to inhibit antimony flotation of gold from the coarse gold concentrate, and finally fine-grained gold concentrate and antimony minerals are obtained.

3.Oxidant flotation gold extraction method

This method mainly uses mixed flotation. Before flotation, add oxidant bleaching powder or potassium permanganate, etc., so that the solid-liquid ratio of the slurry is 1:3, stir for 1 minute, and then add quantitative lead acetate and xanthate collector to float. Select antimony ore, and finally the tailings are slightly gold-containing pyrite concentrate. After flotation of the tailings, qualified gold concentrate and pyrite are selected.

4.Butylammonium black drug flotation gold method

Butylammonium black powder has a good ability to capture stibnite and has good selectivity. By adding an appropriate amount of butylammonium black powder, it can effectively separate stibnite and gold. Before flotation, in the grinding and classification circuit, first use a gold trap or gravity separation to select coarser-grained single natural gold, and then carry out preferential flotation, using lead salt as the activator of the stibnite and sulfuric acid as the activator. pH adjuster, butylammonium black liquor as collector, pine alcohol oil as foaming agent, flotation of antimony ore in natural pH or weakly acidic pulp to obtain antimony concentrate, and the flotation tailings are gold-containing arsenopyrite (Pyrite) coarse concentrate, then add butyl xanthate to the tailings, add copper sulfate for activation if necessary, and add a foaming agent to float out the gold-containing arsenopyrite concentrate, and extract gold from it. The gold in antimony concentrate can be comprehensively recovered during the smelting process.

The above is an introduction to several methods of flotation gold extraction from antimony gold mines. In the actual mineral processing process, antimony metal is difficult to separate gold. If the mineral processing process is not selected well, it is likely to cause investment failure. Therefore, it is recommended to conduct a mineral processing test first. , design a suitable gold extraction method from antimony gold mines based on the actual conditions of the mineral to obtain an ideal return on investment.