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提高截止品位降低贫化是无底柱分段崩落法矿山节能降耗的重要途径

REDUCING DILUTION BY RAISING DRAWING CUTOFF GRADE IS AN IMPORTANT APPROACH IN SAVING ENERGY AND RESOURCES IN SUBLEVEL CAVING

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【作者】 刘兴国； 张志贵； 李本录；

【Author】 LIU Xinguo ZHANG Zhigui(Northeastern University) (Southwest Institute of Technology)LI Benlu (Jiuquan Iron and Steel Company)

【机构】 东北大学； 西南工学院； 酒泉钢铁公司；

【摘要】 无底柱分段崩落法存在的问题之一是由于现行截止品位过低造成的矿石贫化大。改革现行放矿方式,施行不贫化放矿,即用矿岩界面正常到达出矿口条件控制放矿,使放矿过程不产生贫化。镜铁山矿试验了不贫化放矿,在矿石回采率85.18%(试验前为81.26%)条件下使贫化率下降到7.64%,共获经济效益2473万元。

【Abstract】 The main problem of its high dilution whose main cause is the practice of using too low a cutoff grade in drawing control. The current practice of drawing control should be changed to "no-dilution"drawing. The basic principle of no-dilution control is to stop drawing as soon as waste rock is seen at the drawing points, causing virtually no dilution during drawing. Production trying out on no-dilution drawing was carried out in Jingtieshan Mine. Results show that dilution is reduced to 7. 64 % while the cumulative ore recovery is 85. 18 % (which was 81. 26 % before the testing). This brings an economic gain of 24. 73 million yuan.

  • 【会议录名称】 1997中国钢铁年会论文集（上）
  • 【会议名称】1997中国钢铁年会
  • 【会议时间】1997-10
  • 【分类号】TD853
  • 【主办单位】中国金属学会
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