And these results of some main conditions from carrier flotation have been compared, the results show that the recovery of fine grained gold have been increased by applying sulphonating kerosene as a subsidiary collector,at the same time, it also decrease the consumptions of xanthate and No.

A series of sulfonated heavy crude oil (SHCO) are prepared through sulfonating a heavy crude oil of Liaohe with viscosity 1 153 mPa·s at 50℃ by 50-60% sulfuric acid at low temperatures 15-20℃ and, introduced into the heavy crude at dosage 2 g/kg, reduce its viscosity at 50℃ to 786-914 mPa·s with viscosity reduction rate being 19.