药剂与超声波处理的选煤方法研究

Research on Coal Flotation by Coaction of Reagents and Ultrasonic Wave Treatment

采用浮选药剂和超声波技术相结合的方法进行了煤的浮选试验 ,结果表明 :BET作为煤的浮选药剂 ,比 GF,FS2 0 2两种常用药剂用量少 ,分别是它们的 1 /1 0和 1 /1 0 0 ;此外 ,BET选择性强 ,对煤系黄铁矿捕收性差 ,浮选黄铁矿时用 BET的上浮物是用 GF,FS2 0 2时的 1 /1 0～1 /2 0 .超声波的强化作用进一步提高了抑制剂的作用效果 ,使脱硫降灰的指标有了明显的提高(达 1 5 %以上 ) ,如介休煤样的黄铁矿脱硫率在 85 %左右 ,脱硫完善度达到 6 8.97% .抑制剂 Ca O和水玻璃同时使用可以提高脱硫降灰效果 。

Coal flotation experiment was performed by using reagents and ultrasonic wave treatment. The result shows that the dosage of BET, a flotation reagent, is less than the commonly used reagents GF and FS202, only 1/10 to 1/100 of the two reagents. In addition, the BET is good in selectivity and poor in collectivity for pyrite. In separating pyrite, the floated matter by using BET is 1/10 to 1/20 of that by using GF and FS202. The ultrasonic treatment may further improve the restraint effect and increase its desulfurization ratio by 15%. The Jiexiu coal, for example, has a desulfurization ratio of 85%. By using CaO and water glass simultaneously, it may also improve the desulfurization effect.