某含砷硫化矿硫砷分离试验研究

发布时间：2018-02-15 13:29

本文关键词： 黄铁矿毒砂抑砷浮硫抑硫浮砷有机抑制剂Y-3#　出处：《江西理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：砷物质,会给人体健康和环境带来严重的危害。由于砷黄铁矿与黄铁矿的可浮性极为相近,导致在硫化矿选矿工业生产中,砷通常会与硫化矿伴生,加之砷矿物又是金的主要载体,直接影响硫精矿的质量和资源的浪费。显然,精矿降砷为选厂的必然措举。因此,研究含砷硫化矿的浮选有效分离不仅能提高选矿厂的经济效益,而且还有具有一定的理论和实践意义。论文以毒砂和黄铁矿纯矿物为研究对象,在调整剂、捕收剂等体系下,考察了毒砂、黄铁矿的浮选行为。结果表明:在有机抑制剂Y-3#用量为24 mg/L的条件下,毒砂矿物的回收率为20.13%,而此时的黄铁矿浮选回收率为85.19%。在矿浆p H值为8.5,有机抑制剂Y-3#用量为20 mg/L的条件下,实现了二者人工混合矿的浮选分离。对安徽某实际含砷硫精矿进行了硫砷分离过程试验研究,以Y-3#为抑制剂“抑砷浮硫”与“抑硫浮砷”工艺流程方案。在实际含S 35.00%、含As 3.12%、含Au 0.90 g/t的条件下,通过“抑砷浮硫”流程闭路获得了含S 46.12%、S回收率78.90%,含As0.06%、As回收率1.18%,含Au 0.25 g/t、Au回收率17.57%的硫精矿;含As 8.66%、As回收率98.82%,含S 21.24%、S回收率21.10%,含Au 2.02 g/t、Au回收率82.43%的砷精矿。实现了含砷硫化矿的高效浮选分离。与“抑硫浮砷”流程方案相比,试验获得的硫精矿中含砷量较低,且硫的综合指标较好。因此,选用“抑砷浮硫”工艺流程方案对本实际矿物的分选更具有优势。采用红外光谱、ξ-电位等分析测试方法,探讨了有机抑制剂Y-3#对黄铁矿、砷黄铁矿纯矿物的作用机理。结果表明:捕收剂丁基黄药以双黄药形式在黄铁矿表面与有机抑制剂Y-3#产生竞争吸附。有机抑制剂Y-3#与二者矿物中的表面金属离子可能发生螯合作用,在其表面发生了化学吸附。
[Abstract]:Arsenic can cause serious harm to human health and environment. As the floatability of arsenopyrite and pyrite is very similar, arsenic is usually associated with sulphide ore in the industrial production of sulphide ore processing. In addition, arsenic mineral is the main carrier of gold, which directly affects the quality of sulfur concentrate and the waste of resources. The study on the effective flotation separation of arsenic-bearing sulphide ore can not only improve the economic benefit of the concentrator, but also have certain theoretical and practical significance. This paper takes the arsenopyrite and pyrite pure minerals as the research object, under the system of adjuster, collector, etc. The flotation behavior of arsenopyrite and pyrite was investigated. The recovery rate of arsenopyrite minerals is 20.13, while that of pyrite flotation is 85.19.The pH value of pulp is 8.5 and the amount of organic depressant Y-3# is 20 mg/L. The flotation separation of two artificial mixed ores has been realized. The experimental study on the separation process of sulfur and arsenic in an actual arsenic bearing sulfur concentrate in Anhui Province has been carried out. Under the actual conditions of S 35.00, as 3.12 and au 0.90 g / t, the technological process of "inhibiting arsenic and floating sulfur" and "inhibiting arsenic floating sulfur" and "suppressing arsenic and floating sulfur" as inhibitors were used as the inhibitors, respectively, under the conditions of actual content of S 35.00, as 3.12 and au 0.90 g / t, respectively. The sulfur concentrate containing S 46.12% S recovery 78.90, as 0.06 as recovery 1.18% and au 0.25 g / t au recovery 17.57% were obtained through the closed circuit of "suppression of arsenic and floating sulfur" process. The recovery rate of as 8.66 is 98.82%, the recovery rate of S 21.24N / S is 21.10%, and the recovery rate of au 2.02 g / t ~ (-1) au is 82.43%. The high efficiency flotation separation of arsenic-bearing sulphide ore has been realized. Compared with the scheme of "sulfur suppression floating arsenic", the arsenic content in the sulfur concentrate obtained by the experiment is lower. And the comprehensive index of sulfur is better. Therefore, it is more advantageous to select the technological process of "inhibiting arsenic and floating sulfur" for the separation of the actual minerals. The organic inhibitor Y-3# for pyrite is discussed by means of infrared spectrum, 尉-potential and other analytical and testing methods. The mechanism of action of arsenopyrite pure minerals. The results show that the collector Ding Ji xanthate acts as a double xanthate on the surface of pyrite to produce competitive adsorption with the organic inhibitor Y-3# and the surface metal ions in both minerals. May chelate, Chemisorption occurs on its surface.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD951

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