起泡剂性能及其对煤泥浮选的影响研究

为提高煤泥浮选效果,利用充气法和TRACKE界面张力仪研究了仲辛醇和GF油的起泡能力及泡沫稳定性,分析柴油对起泡剂起泡能力和泡沫稳定性的影响,并采用2种捕收剂对山西煤样进行煤泥浮选试验研究。结果表明:起泡剂质量分数相同时,GF油的起泡能力要高于仲辛醇,GF油的界面张力比仲辛醇低,但界面张力曲线的斜率比仲辛醇大,因此,GF油的泡沫稳定性大于仲辛醇。起泡剂质量分数相同时,GF油产生泡沫的半衰期要高于仲辛醇,说明其泡沫稳定性要好于仲辛醇。在仲辛醇和GF油中加入柴油后,溶液界面张力下降明显,泡沫半衰期增加,提高了起泡剂的起泡能力和泡沫稳定性。煤泥浮选试验表明,起泡剂用量相近时,GF油作起泡剂的煤泥浮选精煤产率和精煤灰分均高于仲辛醇。 In order to improve coal slime flotation efficiency,the foaming property and foam stability of sec-octyl alcohol and GF flotation agent were investigated using aeration method and interface tensiometer.The influence of diesel oil on foaming properties and foam stability was researched.The two collectors were used to separate Shanxi coal samples. The results showed that,when the mass fraction were the same,the foaming property and slope of interfacial tension curve of GF flotation agent was higher than that of sec-octyl alcohol,while the interfacial tension of GF flotation agent was lower than that of sec-octyl alcohol.So the foam stability of GF flotation agent was better than that of sec-octyl alcohol.The addition of diesel oil to sec-octyl alcohol and GF flotation agent reduced the interfacial tension and improved foam half-life period,foaming property and foam stability. The results of coal slime flotation experiments showed that,when the dosage of frother was similar,the GF flotation agent was able to significantly increase clean coal yield and clean coal ash