关键词: 白钨矿, 浮选, 新药剂

Abstract: Main valuable minerals of a scheelite ore in Jiangxi is tungsten，which mainly exists in form of scheelite.Original on-site process is gravity，and the production index is not ideal.Systematic ore dressing research is carried out in order to improve the separation efficiency.The results indicated that，desulfuration by flotation at the grinding fineness of 65% passing 0.074 mm，using NaOH+Na₂CO₃ as modifier，Na₂SiO₃+GS as depressor，731 oxyparaffin soap+YK as collector，through flotation process of preconcentration of one roughing，one cleaning，two scavenging-thicken for tailings of preconcentration and then through one roughing，four cleaning，two scavenging-combination of tailings of first and second cleaning through clean-scavenging operation-concentrate returning to second clean-cleaning，tailing returning to first clean-scavenging，scheelite concentrate assay 66.71% WO₃ and recovery of 72.91% was obtained.The on-site process is transformed according to the flotation results，and scheelite concentrate assay 62.29% WO₃ and recovery of 74.21% was obtained.WO₃ grade and recovery of the concentrate increased by 10.10 and 18.86 percentage points respectively compared with the previous，content of sulfur decreased from 1.53% to 0.21%.The superiority of flotation is apparent.

Key words: Scheelite, Floatation, Novel reagent