The gold-bearing dust generated during the roasting process of refractory gold concentrates is valuable as a secondary gold resource. In this study, the effects of different pre-treatment methods on the removal of harmful elements and gold extraction from gold-bearing dust by cyanidation after pre-treatment were studied based on mineralogical analysis. The results showed that the dust belonged to refractory gold ore category, and the detrimental effects of arsenic, carbon and iron on gold extraction could be responsible for the low gold extraction. The removal efficiencies of arsenic and carbon were 99.7 and 60.6%, respectively, at a NaOH concentration of 6 mol L⁻¹; moreover, gold extraction was 58.9% and increased by only 4.60% compared to direct cyanidation. The removal efficiencies of iron, arsenic, and carbon were 33.7, 80.4, and 12.6% at a 15 wt% H₂SO₄ concentration, respectively, and gold extraction reached 80.4%. After roasting at 650 °C with an airflow rate of 0.2 m³ h⁻¹ for 4 h, the removal efficiencies of arsenic and carbon were 54.7 and 95.0%, respectively, and gold extraction reached 84.5%. Through 6 mol L⁻¹ NaOH leaching after roasting, the removal efficiencies of arsenic and carbon were 99.5 and 95.5%, respectively, and gold extraction reached 86.1%. Through 50 wt% H₂SO₄ leaching after roasting, the removal efficiencies of iron, arsenic, and carbon were 99.5, 99.6, and 99.0%, respectively, and gold extraction reached 95.5%. These findings indicated that carbon had the greatest influence on gold leaching from the dust, followed by iron and arsenic. Through the comparison of different gold leaching processes, a proper process for gold extraction from the dust was developed. Under the most suitable condition, gold extraction improved by 41.2% compared to that of direct cyanidation.

在难熔金精矿的焙烧过程中产生的含金粉尘作为次要黄金资源是有价值的。在这项研究中，基于矿物学分析，研究了不同预处理方法对预处理后氰化法从含金粉尘中去除有害元素和提取金的影响。结果表明，粉尘属于难处理的金矿类，砷，碳，铁对金的提取有害，可能是造成金提取量低的原因。在NaOH浓度为6 mol L ^-1时，砷和碳的去除效率分别为99.7和60.6％。; 此外，与直接氰化相比，金的提取率为58.9％，仅增加了4.60％。在15 wt％H ₂ SO ₄浓度下，铁，砷和碳的去除效率分别为33.7、80.4和12.6％，金提取率达到80.4％。在650°C下以0.2 m ³  h ^-1的风速焙烧4 h后，砷和碳的去除效率分别为54.7和95.0％，金提取率达到84.5％。通过焙烧后6 mol L ^-1的NaOH浸出，砷和碳的去除效率分别为99.5和95.5％，金提取率达到86.1％。通过50 wt％H ₂ SO ₄焙烧后浸出，铁，砷和碳的去除效率分别为99.5％，99.6和99.0％，金提取率达到95.5％。这些发现表明，碳对灰尘中金的浸出影响最大，其次是铁和砷。通过比较不同的金浸出工艺，开发了一种从粉尘中提取金的合适工艺。在最合适的条件下，与直接氰化相比，金的提取提高了41.2％。