采用较简单的工艺流程对都龙难选锌矿物进行浮锌试验，取得较好的技术指标。
By the float zinc experiment of refractory zinc minerals in Dulong, using more simple technological process, proper technical performances were obtained.
开发高效浮选促进剂是改善难浮煤浮选效果的重要方法。
The development of high efficient accelerant for floatation is an important method to improve the floatation efficiency of difficult floated coal.
论述了煤泥氧化后对可浮性的影响及改善难浮煤泥浮选效果的可行途径。
The paper gives an account of the influence of oxidized coal slime on its floatability and the way to improve the performance of flotation treating such slime.
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