煤矿深度筛分与重介质选煤技术结合工艺研究  

Research on the combined process of deep screening and heavy medium coal selection technology in coal mines

作　　者：张鹏飞 ZHANG Pengfei(Zhenchengdi Mine Coal preparation plant of Shanxi Coking Coal Group Energy Co.,Ltd.,Taiyuan030203,China)

机构地区：[1]山西焦煤能源股份有限公司镇城底矿选煤厂,山西太原030203

出　　处：《煤矿现代化》2024年第3期137-140,136,共5页Coal Mine Modernization

摘　　要：优化洗选工艺设计,提高商品煤质量是提高煤矿经济效益的关键技术,针对煤泥全粒级洗选中存在的褐煤提质技术难题,以山西省镇城底矿为例,提出了深度筛分与重介质选煤技术结合工艺,结果表明,合理调整工作频率和张紧力可显著提高3 mm弛张筛的筛分效果,筛分效率达到81.77%,筛下率仅为2%,频率的最佳范围为46~50 Hz,张力的最佳范围为-6~0 mm。对于重介分选机,发现分选后的灰分偏析主要受给料位置、水平流与上升流流量比和给料速率的影响。当给料位置为15 cm,水平流向上升流流量比为2.75,给料速率为27.5 kg/min时,灰分偏析值最大,为0.746。Optimizing the design of washing process and improving the quality of commercial coal are the key technologies to improve the economic benefits of coal mines.Aiming at the technical problems of lignite upgrading in full-size slime washing,taking Zhenchengdi Coal Mine in Shanxi Province as an example,a combination process of deep screening and heavy medium coal preparation technology is proposed.The results show that reasonable adjustment of working frequency and tension can significantly improve the screening effect of 3 mm flip-flow screen.The screening efficiency reaches 81.77%,and the under-screening rate is only 2%.The optimal range of frequency is 46~50 Hz,and the optimal range of tension is-6~0 mm.For the heavy medium separator,it is found that the ash segregation after separation is mainly affected by the feeding position,the ratio of horizontal flow to upwelling flow and the feeding rate.When the feeding position is 15 cm,the flow ratio of the horizontal flow to the upward flow is 2.75,and the feeding rate is 27.5 kg/min,the ash separation is the largest,which is 0.746.

关 键 词：深度筛分 重介质选煤 镇城底矿 

分 类 号：TD94[矿业工程—选矿]