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銻金 (砷)礦的浮選分渣漿泵離方法是什么?
在銻金(砷) 硫化礦石中，主要目的礦物有輝銻礦、自然金、黃鐵礦、毒砂等，而黃鐵礦、毒砂是主要載金礦物，有的輝銻礦也含金。毒砂含砷，有時黃鐵礦也含砷。因此，該類型礦石含砷較高。
該類型礦石中的銻金(砷)分離，除了粗粒自然金用重選回收外，大部分是輝銻礦與黃鐵礦、毒砂等礦物的分離。浮選分離銻金(砷)礦物的工藝流程在實踐中有優(yōu)先浮選及混合-優(yōu)先浮選。浮選分離的方法有下列幾種:氫氧化鈉法;硫化鈉-氫氧化鈉或碳酸鈉法;氧化劑法;丁銨黑藥法;氰化物法。因氰化物有毒，影響環(huán)保，并溶解金、銀，該法在國內(nèi)目前應(yīng)用較少。
氫氧化鈉法:采用優(yōu)先浮選工藝流程，在球磨機中加入氫氧化鈉，在強堿性礦漿中磨礦來抑制輝銻礦.用硫酸銅來活化黃鐵礦及毒砂，再將礦漿pH調(diào)到8~9，加入捕收劑及起泡劑，浮選出黃鐵礦及毒砂，得金(砷)精礦，其尾礦加入鉛鹽或銅鹽活化輝銻礦，再加入捕收劑及起泡劑進(jìn)行浮選，得銻精礦。
硫化鈉-氫氧化鈉或碳酸鈉法:在磨礦過程中加氫氧化鈉及碳酸鈉，然后加醋酸鉛、硫酸銅、丁基黃藥及硫酸進(jìn)行混合浮選得銻金混合精礦與廢棄尾礦。混合精礦經(jīng)再磨，磨礦時加氫氧化鈉、丁基黃藥、硫酸銅并充氣幾分鐘，然后進(jìn)行浮選分離，得金粗精礦，槽中產(chǎn)物就是銻精礦。再將金粗精礦采用硫化鈉-氫氧化鈉法來抑制輝銻礦進(jìn)行精選，得到金精礦及低品位銻精礦。
氧化劑法:在混合精礦浮選分離前，加入氧化劑漂白粉(CaOCl2)或高錳酸鉀(KMnO:), 礦漿固:液為1 : 3,攪拌時間為1min,然后加入醋酸鉛100g/t,用黃藥為捕收劑來浮選輝銻礦。其尾礦為含金黃鐵礦精礦。渣漿泵廠家
丁銨黑藥法:利用丁銨黑藥對輝錦礦捕收能力較強、具有較好的選擇性，而對毒砂及黃鐵礦捕收能力弱的特點進(jìn)行銻金(砷)浮選分離的一種方法。先在磨礦-分級回路中用捕金器或重選即時選出粗粒單體自然金。然后采用優(yōu)先浮選流程,用鉛鹽作輝銻礦的活化劑，以硫酸來調(diào)節(jié)礦漿的pH,丁銨黑藥為捕收劑，松醇油為起泡劑，在自然pH或弱酸性礦漿中浮選出輝銻礦得銻精礦。浮選尾礦就是含金毒砂(黃鐵礦)粗精礦(因丁銨黑藥對毒砂捕收能力弱)。將其尾礦加入丁基黃藥，必要時加硫酸銅活化，再加起泡劑浮選出含金毒砂精礦，并從中提取金。銻精礦中的金，在冶煉銻的過程中進(jìn)行綜合回收。
What is the separation method of flotation slag and slurry of antimony gold (arsenic) ore?
In antimony gold (arsenic) sulfide ores, the main target minerals are stibnite, natural gold, pyrite, arsenopyrite, etc., while pyrite and arsenopyrite are the main gold bearing minerals, and some stibnite also contains gold. Arsenopyrite contains arsenic, and sometimes pyrite also contains arsenic. Therefore, this type of ore has high arsenic content.
In addition to the recovery of coarse natural gold by gravity separation, most of the antimony (arsenic) in this type of ore is the separation of stibnite from pyrite, arsenopyrite and other minerals. The technological process of flotation separation of antimony gold (arsenic) minerals has priority flotation and mixed priority flotation in practice. The methods of flotation separation are as follows: sodium hydroxide method; sodium sulfide sodium hydroxide or sodium carbonate method; oxidant method; black agent method of butylammonium; cyanide method. Due to the toxicity of cyanide, the influence of environmental protection, and the dissolution of gold and silver, this method is rarely used in China at present.
Sodium hydroxide method: priority flotation process is adopted. Sodium hydroxide is added to the ball mill to grind in the strong alkaline pulp to inhibit stibnite. Copper sulfate is used to activate pyrite and arsenopyrite, and then the pulp pH is adjusted to 8-9. Collector and frother are added to flotation to produce pyrite and arsenopyrite, and gold (arsenic) concentrate is obtained. Lead salt or copper salt is added to tailings to activate stibnite, then collector and arsenopyrite are added Antimony concentrate is obtained by flotation with frother.
Sodium sulfide sodium hydroxide or sodium carbonate method: add sodium hydroxide and sodium carbonate in the grinding process, and then add lead acetate, copper sulfate, butyl xanthate and sulfuric acid for mixed flotation to obtain antimony gold mixed concentrate and waste tailings. After regrinding, sodium hydroxide, butyl xanthate and copper sulfate are added to the mixed concentrate and inflated for a few minutes, then flotation separation is carried out to obtain the coarse gold concentrate. The product in the tank is antimony concentrate. After that, the method of sodium sulfide sodium hydroxide was used to restrain stibnite from being cleaned to get gold concentrate and low-grade stibnite concentrate.
Oxidant method: before flotation separation of mixed concentrate, add oxidant bleaching powder (caocl2) or potassium permanganate (KMnO:), pulp solid: liquid: 1:3, stirring time: 1min, then add lead acetate 100g / T, use xanthate as collector to flotation stibnite. Its tailings are gold bearing pyrite concentrate. Slurry pump manufacturer
Black medicine method of butylammonium: a method of flotation separation of antimony and gold (arsenic) by using black medicine of butylammonium with strong collection capacity and good selectivity for Huijin mine, but weak collection capacity for arsenopyrite and pyrite. First, the coarse-grained natural gold is selected in grinding grading circuit by using gold catcher or gravity separation. Then, the antimony concentrate from stibnite is obtained by using lead salt as activator, sulfuric acid as pH regulator, ammonium butyrate as collector and terpineol oil as frother in natural pH or weak acid pulp. The flotation tailings are the coarse concentrate of arsenopyrite (Pyrite) containing gold (the ability of collecting arsenopyrite is weak due to the black medicine of butylammonium). The tailings are added with butyl xanthate, activated with copper sulfate if necessary, and then floatated with foaming agent to produce gold bearing arsenopyrite concentrate, from which gold is extracted. The gold in antimony concentrate is comprehensively recovered in the process of smelting antimony.
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