Floatation separation method for pyrites from arsenopyrites
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A technology for arsenopyrite and pyrite, which is applied in flotation, solid separation, etc., and can solve problems such as separation of sulfur and arsenic
Inactive Publication Date: 2010-09-29
CENT SOUTH UNIV +1
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[0004] Aiming at the problem of separation of sulfur and arsenic in the current flotation process, by adjusting the flotation process factors and using high-efficiency reagents, the flotation separation selectivity of arsenopyrite and pyri...
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Embodiment 1
[0046] The pyrite of arsenic-containing pyrite after lead-zinc flotation in a lead-zinc sulfide ore in Mengzi, Yunnan Province, the sulfur is mainly distributed in pyrite and pyrrhotite, followed by arsenopyrite, and the arsenic-containing mineral is arsenopyrite. The results of the multi-element analysis of the raw ore are shown in Table 1.
[0047] Table 1 Multi-element analysis of raw ore
[0048]
[0049] use as figure 1 Shown technological process, concrete technological parameter is as follows:
[0050] 1) Adjustment of arsenic-containing pyrite pulp
[0051] In the mixing equipment, the solid-liquid ratio (mass ratio) is stirred and adjusted according to 3:1, the pH regulator sodium carbonate 1500g / t raw ore is added to keep the pH value at 9.0-9.3, and the pulp potential regulator sodium persulfate (Na 2 S 2 o 8 )500g / t raw ore, calcium hypochlorite (Ca(ClO) 2 ) 800g / t raw ore, adjust the pulp potential to 350-360mV relative to the hydrogen standard potential....
Embodiment 2
[0065] The pyrite of arsenic-containing pyrite after lead-zinc flotation in a lead-zinc sulfide ore in Wenshan, Yunnan. The sulfur is mainly distributed in the pyrite, and the arsenic-containing mineral is arsenopyrite. The results of the multi-element analysis of the raw ore are shown in Table 2.
[0066] Table 2 Multi-element analysis of raw ore
[0067]
[0068] use as figure 1 Shown technological process, concrete technological parameter is as follows:
[0069] 1) Adjustment of arsenic-containing pyrite pulp
[0070] For arsenic-containing pyrite, the solid-to-liquid ratio (mass ratio) in the mixing equipment is 3:1 for mixing and mixing, adding a pH regulator sodium carbonate 2000g / t raw ore to keep the pH value at 9.5-10, adding the slurry to adjust the potential sodium persulfate (Na 2 S 2 o 8 )800g / t raw ore, calcium hypochlorite (Ca(ClO) 2 ) 1000g / t raw ore, adjust the slurry potential to 360-380mV relative to the hydrogen standard potential. Air is fed int...
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Abstract
The invention aims at floatation separation of arsenic from sulfur in arsenic-containing pyrites. The floatation separation comprises the following steps of: adjusting an ore pulp to keep the pH value of the pulp between 9 and 10; adjusting the potential of the ore pulp to between 350 and 380 millivolts by adding oxidant medicaments of sodium persulfate and calcium hypochlorite; introducing air to increase oxygen content in the ore pulp; and stabilize electrochemical conditions of mineral floatation. During the floatation separation of the pyrites from the arsenopyrites, the potential of the ore pulp is stabilized by adding the oxidant medicaments of sodium persulfate and calcium hypochlorite; the arsenopyrite is suppressed by using a new collector of dianilino dithiophosphoric acid, and regulators of sodium silicate and sodium humate according to a principle of an electrochemical floatation process to make the pyrites such as arsenopyrites, iron pyrites, pyrrhotites and the like acted with a medicament selectively in the subsequent floatation process; and the floatation separation of the pyrites from the arsenopyrites is performed so as to form a sulfur concentrate with low arsenic content.
Description
technical field [0001] The invention relates to the field of mineral flotation, and relates to a method for flotation separation of pyrite and arsenopyrite on arsenic-containing pyrite. Background technique [0002] Most metal sulfide ores in my country contain pyrite minerals, mainly pyrite (FeS 2 ) and pyrrhotite (FeS). In the process of beneficiation, this part of pyrite minerals is generally enriched by flotation to obtain sulfur concentrate, which is the main raw material for sulfuric acid production. However, there are quite a lot of metal sulfide ores in our country that more or less contain arsenopyrite (FeAsS), also known as arsenopyrite, because arsenopyrite and pyrite are closely symbiotic, and some of them The physical and chemical properties are similar, which makes the separation of sulfur and arsenic a difficult problem in flotation. Arsenopyrite enters the sulfur concentrate during the flotation process, and the content of As in the sulfur concentrate become...
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