某金矿选矿厂磨浮工艺技术改造与实践

Technical renovation and practice of grinding and flotation process in a gold ore-dressing plant

辽宁某金矿选矿厂针对矿石性质变化,为稳定生产、充分挖掘生产技术指标提升潜力,提高选矿厂的日处理能力和金回收率,开展了技术改造和新药剂应用研究。通过改造二段圆锥破碎机HP300中碎型衬板为细碎型衬板,同时降低振动筛筛孔尺寸,在保证处理能力的同时入磨产品的粒度由-12 mm占90%降低至-10 mm占90%;通过改造球磨机衬板和排料器内反螺旋高度,增加了球磨机的有效容积,处理能力由900 t/d提高至1200 t/d,且磨矿产品粒级分布更为合理;采用捕收能力更强的新型捕收剂RX01代替原丁基黄药,在保证金精矿品级的前提下,最终浮选尾矿金品位由原来的0.188 g/t下降至0.160 g/t。技术改造后,年多生产金金属量33 kg,为企业年增加经济效益600多万元。

Based on the ore property,a gold ore-dressing plant in Liaoning Province carried out technical renovation and studied the application of new reagents to stabilize production and fully explore the improvement potentials of production technical index and improve the daily treatment capacity and gold recovery rate of the plant.The plant renovated the middling crushing linings of the two-stage cone crusher HP300 to fine crushing linings,and at the same time reduced the size of vibrating screen meshes,which lowered the grain height of the feeding product of grinding from-12 mm 90%to spiral in the-10 mm 90%while maintaining the treatment capacity;by renovating the linings of ball mill and the height of the reverse spiral in the discharge device,the effective volume of the ball mill is increased,the grinding capacity is increased from 900 t/d to 1200 t/d,and the grain size distribution of the grinding products is more reasonable;the more effective collector RX01 is used to replace the previous butyl xanthate while preserving the gold concentrate grade,the gold grade of the final flotation tailings is reduced from 0.188 g/t to 0.160 g/t.After the technical renovation,33 kg more gold metal is produced annually,creating 6 million yuan more profits for the enterprise.