<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">

難處理金礦非氰浸金研究進展

Research progress on non-cyanide leaching of refractory gold ores

  • 摘要: 隨著黃金需求量的不斷增加及易處理金礦資源的日益減少, 難處理金礦逐漸成為黃金產業的主要資源來源.為使難處理金礦能夠合理、高效地開發利用, 對難處理金礦進行了簡要概述和分類, 并闡述其難處理的原因.采用傳統的氰化法浸出難處理金礦, 其浸出效果差, 且氰化物有劇毒, 嚴重污染環境及危害人體健康.為實現難處理金礦的高效、環保浸出, 非氰化法浸出難處理金礦受到廣泛關注.重點介紹了硫代硫酸鹽法、硫氰酸鹽法、硫脲法、多硫化物及石硫合劑法、液氯化法五種非氰浸金方法的浸金原理及在難處理金礦方面的最新研究進展.基于非氰浸金方法存在的浸出體系復雜、浸出劑性質不穩定及消耗量大等問題, 展望了非氰浸金技術的發展方向.

     

    Abstract: With the increasing demand for gold and the decreasing of easily treated gold resources, refractory gold ores, which are characterized by low gold recovery and high cyanide consumptions when subjected to direct cyanide leaching, have gradually become the main sources of gold. Thus, reasonable exploitation and utilization of refractory gold ores are of great significance to the sustainable development of the gold industry in China. To ensure a reasonable and efficient utilization of refractory gold ores, refractory gold ores were reviewed and classified in this paper, and the difficulties of handling were briefly reviewed. For over one hundred years, cyanidation has been the predominant process of extracting gold from mineral sources. The major reason for adopting cyanide rather than other lixiviants is its higher chemical stability and lower cost. But in recent years, the utilization of the traditional cyanide method to leach gold have been undesirable; this is mainly because the acute toxicity of cyanide can result in environmental pollution and human health hazard. Moreover, leaching of refractory gold ores by traditional cyanidation techniques also results in poor gold recovery. On this basis, non-cyanide lixiviants have attracted considerable attention in the metallurgical industry, and several non-cyanide leaching methods have been proposed for gold extraction because of their non-toxic nature, acceptable gold leaching rates, and high gold recovery. In this paper, the leaching mechanisms and the latest research progress of non-cyanide gold leaching techniques for refractory gold ores, such as leaching processes with thiosulfate, thiocyanate, thiourea, polysulfide, lime-sulfur-synthetic solution (LSSS) and chlorination, were discussed in detail. Then considering features of non-cyanide gold leaching such as a complex leaching system, unstable leaching agents, and large consumption of leaching agents, and development directions of non-cyanide gold leaching technology for refractory gold ores were proposed.

     

/

返回文章
返回
<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">
259luxu-164