河南某低品位金矿堆浸试验研究

摘要

河南某金矿为低品位高泥质氧化金矿，金含量0．98 g/t，实验室采用柱浸工艺模拟现场堆浸进行试验研究，通过对矿石粒度、氧化钙用量、喷淋液氰化钠浓度、浸出时间等工艺参数进行优化，确定了最佳条件，并获得了较好的选别指标，金浸出率89．23％，浸渣金品位0．11 g/t。如原矿含泥较高，则可进行分级处理，分级后粗级别采用堆浸工艺，细级别则采用搅拌浸出工艺。试验所采用的工艺为处理同类型金矿提供了强有力的技术支撑。%A high politic, low grade oxidized gold ore in He'nan contains 0.98 g/t of Au.Labora-tory test was conducted by the column leaching , which can simulate heap leaching process .The processing parameters , including ore granularity , calcium oxide dosage ,spraying liquid -sodium cyanide concentration and leaching time , were optimized and the best result was obtained .The fi-nal leaching rate was 89.23%and the gold content of the leaching residues was 0.11 g/t.When the slime content goes high in the run -of-mine, classification is recommended before leaching process .In this case, the coarse size can go to heap leaching while agitation leaching is more suit -able for the undersize particles .The study can be a reference for exploitation of similar gold ore.