Abstract This paper discusses the removal of arsenic scorodite from the gold ore. Kinetic studies on the possibility of removal of arsenic in a compact shape of arsenic sulfide were carried out, which occupies a small volume. The reagent reaction order and activation energy are calculated. The limiting stage of the process occurred in the intradiffusion region, i.e. the rate of the process limits the diffusion supply of the reagent to the reaction boundary (or removal of products from it) through a layer of a solid substance (hematite-Fe2O3), formed during the sulphidization roasting, which is one of the decomposition products of scorodite. The reactions of decomposition of scorodite with the formation of arsenic sulfides are proposed, and the process of their progress confirmed by thermodynamic calculations and chemical analysis. The results of testing of sulphidization roasting on the gold-bearing refractory ore are presented, in which arsenic is mainly concentrated in scorodite. It was found that the recovery of arsenic in the form of As2S3 and As4S4 in sublimates is 92.1%. Comparative studies on the cyanidation of oxidized scorodite gold-containing ore and the cinder of sulphidization roasting were carried out. The industrial application of this technology provides an environmentally safe and efficient processing of such refractory gold-containing ores. The results show that sulphidization roasting increased the degree of gold recovery from 80% to 93.5% when the cyanide concentration increased from 1 kg/t to 1.75 kg/t.

中文翻译：

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从金矿石中以 AS2S3 和 AS4S4 形式去除臭葱石砷

摘要 本文讨论了金矿中砷臭葱石的去除。进行了关于在硫化砷的紧凑形状中去除砷的可能性的动力学研究，其占用体积小。计算试剂反应级数和活化能。该过程的限制阶段发生在内部扩散区域，即该过程的速率限制了试剂通过一层固体物质（赤铁矿-Fe2O3）扩散供应到反应边界（或从中去除产物），在硫化焙烧过程中形成，是臭葱石的分解产物之一。提出了臭葱石分解与硫化砷形成的反应，并通过热力学计算和化学分析证实了反应过程。介绍了含金难选矿石硫化焙烧试验结果，其中砷主要富集在臭葱石中。发现升华物中以 As2S3 和 As4S4 形式存在的砷的回收率为 92.1%。对氧化臭葱石含金矿石氰化与硫化焙烧炉渣进行了对比研究。该技术的工业应用提供了对此类难熔含金矿石的环境安全和高效加工。结果表明，当氰化物浓度从1 kg/t增加到1.75 kg/t时，硫化焙烧使金回收率从80%提高到93.5%。发现升华物中以 As2S3 和 As4S4 形式存在的砷的回收率为 92.1%。对氧化臭葱石含金矿石氰化与硫化焙烧炉渣进行了对比研究。该技术的工业应用提供了对此类难熔含金矿石的环境安全和高效加工。结果表明，当氰化物浓度从1 kg/t增加到1.75 kg/t时，硫化焙烧使金回收率从80%提高到93.5%。发现升华物中以 As2S3 和 As4S4 形式存在的砷的回收率为 92.1%。对氧化臭葱石含金矿石氰化与硫化焙烧炉渣进行了对比研究。该技术的工业应用为此类难处理的含金矿石提供了一种环境安全且有效的加工方法。结果表明，当氰化物浓度从1 kg/t增加到1.75 kg/t时，硫化焙烧使金回收率从80%提高到93.5%。该技术的工业应用提供了对此类难熔含金矿石的环境安全和高效加工。结果表明，当氰化物浓度从1 kg/t增加到1.75 kg/t时，硫化焙烧使金回收率从80%提高到93.5%。该技术的工业应用提供了对此类难熔含金矿石的环境安全和高效加工。结果表明，当氰化物浓度从1 kg/t增加到1.75 kg/t时，硫化焙烧使金回收率从80%提高到93.5%。