不同消泡剂对浮选精煤的消泡试验及其对浮选的影响

为了解决稳定的浮选精煤泡沫给精煤的储存、转运和脱水带来的系列工业生产问题,进行了硅油消泡剂(G)和乳化烃类油消泡剂(R)对浮选精煤泡沫的消泡试验,考察了消泡剂的添加方式和用量对浮选精煤消泡效果的影响,以及消泡剂残留于循环水对浮选流程的影响.结果表明,消泡剂以喷淋方式加入更能有效增加消泡速率和消泡程度;随着消泡剂用量的增...

Experimental Study on Defoaming of Flotation Concentrate with Different Defoamers and Their Effect on Flotation

In order to solve a series of industrial production problems of storage, transport and dehydration of coal flotation concentrate caused by the strong stability of their foam, the defoaming experiments of silicone defoamer (G) and emulsified hydrocarbon oil defoamer (R) for flotation concentrate were studied to revel the effect of the adding method and dosage of defoamer on the defoaming results. In addition, the effect of residual defoamer in circulating water on flotation process was revealed by the flotation test. The results showed that the rate and degree of defoaming can be increased more effectively by defoamers added in the way of spraying. The defoaming property is better with the increase of the dosage of defoamers and the silicone defoamer is superior to emulsified hydrocarbon oil defoamer. A low amount of defoamer in circulating water has little effect on flotation. When the residual amount increasing, silicone oil defoaming agent reduces flotation selectivity and inhibits flotation, while emulsified hydrocarbon oil defoamer can promote it. It is suggested that the flotation concentrate should be defoamed with low dosage emulsified hydrocarbon oil by spraying.