酒钢西沟矿低品位石灰石回收技术方案

充分回收利用低品位矿石是提高矿山资源回收率和综合经济效益的重要途径。为提高酒钢西沟矿低品位矿石回收率，在总结分析资源回收利用过程中技术难题的基础上，从矿体三维建模、品位差异性分析、质量控制方案、溜井远程监控及反击式破碎机下料口改造等方面开展了技术攻关，解决了低品位地质资源不清、粉矿和块矿贫化差异大、溜井堵塞故障问题突出、破碎机下料孔易堵塞等问题，保证了矿山低品位矿石的平稳生产。近4 a（2018—2021年）回收低品位矿石208万t，矿石综合回采率由93.5%提高至95%以上，有效延长了矿山服务年限，取得了显著的经济效益和社会效益，对于类似矿山具有一定的借鉴作用。

Technical Scheme of Low-grade Limestone Recovery in JISCO Xigou Mine

Full recovery and utilization of low grade ore is an important way to improve the recovery rate of mine resources and comprehensive economic benefits.In order to improve the recovery rate of low-grade ore in Xigou Mine,on the basis of summarizing and analyzing the technical problems in the process of resource recovery and utilization,the technical research was carried out from the aspects of 3D modeling of ore body,grade difference analysis,quality control scheme,remote monitoring of the chute and the reconstruction of the counterattack broken cutting port.The bottleneck problems such as unclear low-grade geological resources,large difference of dilution between divided ore and block ore,prominent fault problem of chaff blockage,easy blockage of crusher feed hole are solved,and the stable production of low-grade ore in the mine was ensured.In recent 4 years （from 2018 to 2021）,2.08 million tons of low-grade ore was recovered,and the comprehensive recovery rate of ore was increased from 93.5% to more than 95%.The mine service life was effectively extended,and significant economic and social benefits were obtained,which has a certain reference for similar mines.