Abstract:
Tungsten contained in the tailings of a tungsten plant in Fujian is as high as 0.16 %. In order to recover the tungsten mineral from the tailings and realize comprehensive utilization of the mineral resource, researches are carried out to analyze the ore properties and ore dressing of the tailings. As was shown in the results, tungsten concentrates with tungsten grade of 30.45 % and tungsten recovery of 52.17 % can be gained throu gh pre -concentration with spiral chute; regrinding of rough concentrate; floatation recovery with sodium silicate selected as pulp regulator, lead nitrate as activator, vegetable oleic acid as collector; then roughing once, scavenging twice and selecting three times by the closed -circuit experiment. Good index is obtained, which indicates that tungsten mineral is recovered effectively from the tailings.