New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thiourea compound selected from compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen or R.sup.2 ; R.sup.2 is selected from saturated and unsaturated hydrocarbyl radicals, hydrocarboxy radicals and aromatic radicals; and R.sup.3 is selected from saturated and unsaturated hydrocarbyl radicals, alkyl polyether radicals and aromatic radicals, said R.sup.2 and R.sup.3 radicals, optionally, and independently, being substituted by polar groups selected from halogen, nitrile and nitro groups. The use of the hydrocarboxycarbonyl thiourea collectors provides excellent metallurgical recoveries of sulfide mineral values in froth flotation processes conducted over a very broad range of pH including acid, neutral and mildly alkaline pH.
本发明公开了用于从
基础金属
硫化物矿石中选矿矿物价值的泡沫浮选过程中使用的新型和改进的收集剂组合物。收集剂组合物包括至少一种选择自式子化合物的羟基羧酰基
硫脲化合物:##
STR1##其中R.sup.1为
氢或R.sup.2;R.sup.2选择自饱和和不饱和的烃基基团、羟基烃基团和芳香基团;R.sup.3选择自饱和和不饱和的烃基基团、烷基聚醚基团和芳香基团,所述R.sup.2和R.sup.3基团可以选择性地和独立地被极性基团取代,所述极性基团选择自卤素、腈和硝基基团。使用羟基羧酰基
硫脲收集剂在非常广泛的pH范围内进行的泡沫浮选过程中,包括酸性、中性和轻微碱性pH,提供了
硫化物矿物价值的优秀冶
金回收率。