The dispersant sodium hexametaphos-phate can selective disperse four kinds of gangue(calcite, fluorite, garnet and quartz)with no effect on selective flocculation of wolframite fines.

• 在不影响微细粒黑钨矿选择性聚团的前提下，分散剂六偏磷酸钠对四种脉石矿物（方解石、萤石、石榴石和石英）具有选择性分散特性。