| 摘要 |
<p>New collectors and methods of using the new collectors in froth flotation processes for the recovery of metals and metal oxides from raw materials. The new collectors are acidic compounds being polycarboxylic acids or salts thereof or phosphonocarboxylic acids or salts thereof or combinations of polycarboxylic acids or salts thereof and a phosphonocarboxylic acid or salts thereof in which the acid compounds are aryl substituted polycarboxylic acids or aryl substituted phosphonocarboxylic acids or aryl substituted combined phosphono/polycarboxylic acids. The new collectors are more selective than previously used collectors resulting in lesser unwanted contaminant material being floated during the flotation process. Additionally, in some embodiments, larger size particles can be floated as compared to previously used collectors. The advantage of the new collectors is that less separation of the recovered material is required to remove unwanted materials making the use of the collectors more economically viable. The new collectors are particularly suited to treating cassiterite to recover tin and/or tin oxides.</p> |
