For more complicated antimony-containing metal minerals, often accompanied by heavy non-ferrous sulfide raw o'clock: arsenopyrite FeAsS, realgar AsS, As2S3 Orpiment arsenic-containing sulfide minerals; galena lead sulfide minerals and the like; and the like zinc sulfide sphalerite minerals; cinnabar mercury-containing sulfide minerals and the like. Oxidized minerals with significant economic value, such as cassiterite , scheelite , etc., are also associated with precious metal minerals such as natural gold.
Therefore, it is necessary to test the comprehensive recovery problem during mineral processing . The description is as follows:
(1) Recycling of cassiterite oxidized ore, which can be recovered by re-election-flotation-re-election process: first use re-election (or heavy medium selection) to lose part of tailings, to obtain coarse concentrate, and then grind The whole flotation has a mixed concentrate containing cassiterite and stibnite. After classification, the coarse particles are re-selected to recover cassiterite. The fine granules are then separated by flotation to separate bismuth and tin (first floatation and then cassiterite), and the whole flotation tail The mine also contains cassiterite, which is also recycled by re-election, such as the Guangxi Changchang Changpo Plant.
(2) Recovery of scheelite The scheelite is also an oxidized ore, and a combined process of re-election flotation can be used. The coarse-grained inlaid part of the ore is recovered by re-election, and the fine-grained inlay is partially ground and floated (gold), then the scheelite is floated. It is also possible to recover tungsten from the raft (gold) tailings by re-election. Such as Hunan Xiangxi Woxi 锑 selection plant. The flotation scheelite of the plant adopts alkaline pulp, the temperature is 20~25°C, and sodium carbonate, water glass and oleic acid are used as flotation reagents, and the dosages are 1800-2200, 600-800 and 140-180 g/ton respectively.
(3) Recovery of arsenic (gold) minerals The arsenic (gold) minerals are roughly similar to the sag of the stibnite. Associated recovering arsenic from the stibnite (gold) mineral technical solution is twofold: First, when at pH 6.5 =, copper sulfate, lead nitrate, as the activator, black powder and xanthate as collector, for antimony, Arsenic (gold) mixed flotation, mixed concentrate with sodium carbonate, sodium sulfide to adjust the pulp pH to 11, inhibiting arsenic (gold), to achieve the purpose of separation of bismuth and arsenic (gold). Such as Hunan Xinshao Longshanyu Plant and Guizhou Sandu Miaolongtun Plant. Secondly, the use of butylammonium black drug as a collector can achieve the separation of arsenic and arsenic, because the drug has weak absorption performance for arsenopyrite, and has strong absorption performance for stibnite, which can be used as a collector. The effect of arsenic (gold) floating rafts. Such as Hunan Taojiang Banxijing Plant and Taojiang Yulihe River Selection Plant.
(4) recovering cinnabar method is to use Pb2 + ion activation, antimony minerals mixed concentrate and flotation of minerals mercury, chromium, potassium and added weight to suppress floating cinnabar stibnite, potassium dichromate because the mineral surface can stibnite The hydrophilic PhCrO4 film is formed, so that the floatation of the stibnite mineral is deteriorated, and the flotation is blocked, so as to achieve the purpose of separating the mercury. China Mining and Metallurgy Research Institute as white silver Wangxiu Yao and others on a large antimony mercuric sulfide deposits in China's Shaanxi Province.
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