金浸出尾渣微波氯化焙烧试验研究  

Experimental study on the microwave chlorination roasting of gold leaching tailings

作　　者：李倩茜 刘梵瑜 Li Qianqian;Liu Fanyu(Xi an Polytechnic University)

机构地区：[1]西安工程大学

出　　处：《黄金》2024年第11期84-89,共6页Gold

摘　　要：金浸出尾渣因含有多种有价元素如金、铜等,其处理工作一直面临着挑战。传统氯化焙烧可有效提取金浸出尾渣中有价元素,但该过程需高温且消耗煤炭、天然气,释放大量二氧化碳和烟气。为此,提出采用微波氯化焙烧的新方法,该方法具有低温、清洁的优势。研究了微波氯化焙烧对Au挥发率和Cl脱除率等指标的影响,探讨了微波功率、氯化剂种类、焙烧温度和CaCl_(2)用量等因素的作用。试验结果不仅阐明了微波氯化焙烧的工作原理,还评估了焙烧渣的毒性。与传统方法相比,微波氯化焙烧显著降低了有毒元素含量。Gold leaching tailings contain various valuable elements such as gold and copper,posing challenges in their treatment.Traditional chlorination roasting can effectively extract valuable elements from gold leaching tailings,but it requires high temperatures,consumes coal and natural gas,and emits large amounts of CO_(2) and flue gases.Therefore,a new method of microwave chlorination roasting was proposed,featuring low temperature and environmental friendliness.The effects of microwave power,type of chlorinating agent,temperature,and CaCl_(2) dosage on indicators such as gold volatilization rate and chlorine removal rate were studied.The results not only elucidate the mechanism of microwave chlorination roasting but also assess the toxicity of the roasting slag.Compared to traditional methods,microwave chlorination roasting significantly reduces the content of toxic elements.

关 键 词：氰化浸出 尾渣 微波 氯化焙烧 氯化剂 

分 类 号：TD926.4[矿业工程—选矿]