凯达选煤厂降低介耗的措施

针对凯达选煤厂介耗偏高的问题,从技术损失和管理损失两方面分析了选煤厂介耗偏高的原因主要有原煤脱泥脱水效果不理想、脱介筛脱介效果差、磁铁矿粉质量不达标、磁选机磁选效率低、加介方式不合理、合介系统密度不稳定、筛面清理不及时、磁选机管理不到位等。通过优化磁选机工作性能,提高脱泥筛脱泥效率,提高脱介筛脱介效果,实现介质系统自动化控制,加强日常管理等措施对选煤厂进行改造。改造后选煤厂磁选机磁选效率明显提高,均达到99%以上;产品带介明显降低,介质系统趋于稳定,产品质量得到保障;介耗由改造前的1.99 kg/t降至1.10 kg/t,每年节省介质费用426万元。 Analyse the causes of high medium consumption of Kaida coal preparation plant from technology loss and management loss. The results show that,bad effects of raw coal desliming and dewatering,low efficiency of medium draining screen and magnetic separator,poor quality of magnetite powder,unreasonable medium adding way,unstable density of medium collection system,delayed screen surface clean,poor management of magnetic separator and so on are the main causes. Reform the coal preparation plant by optimizing performance of magnetic separator,increasing efficiency of desliming screen and medium draining screen,realizing the automation control of medium system and strengthening daily management. After transformation,the efficiency of magnetic separator reaches above 99%,the medium in products decrease. Medium system tends to more stable and products quality is ensured. The medium consumption decrease from 1. 99 kg /t to 1. 10 kg /t,and the plant saves about 4. 26 × 106 yuan per year