通过对屯兰选煤厂重介工艺技术改造方案进行比较分析，认为优选方案为三产品全重介旋流器分选工艺。
By comparing and analysing improving plan of dense-medium technique in Tunlan washery, reaches a conclusion that the best plan of cleaning process is three productions dense-medium cyclone.
分析了屯兰矿选煤厂原煤仓下电振给煤机吊挂系统损坏频繁的原因，将吊挂式改为支应安装方式，消除了环节影响。
Analyses reason that suspension system of electrical vibration convey coal machine is breaked under cleek coal store, changes suspension system into supporting system, that dispel effect of sector.
以工程实验为基础，结合屯兰矿现有瓦斯抽放中封孔工艺，主要针对封孔长度，通过理论分析，确定合理的封孔长度。
Based on engineering experience and combined with presently hole-sealed technology of gas drainage used in Tunlan mine, the reasonable hole-sealed length was determined by theoretical analysis.
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