REAGENT FOR REMOVING WATER WELL SEDIMENTATION Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this reagent can be used for restoration and increasing output of water wells and bore-holes fortified by steel casing tubes. Reagent comes as waste from process of acid polishing of crystal and it contains, mas.%: sulfuric acid, 18-23; hydrofluoric acid, 0.5-3.0; fluorosulfonic acid, 0.01-1.0; normal and acid sulfates of metals of I and II groups, 0.01-0.05; fluorides of metals of I and II groups, 0.1-0.5; silicofluorides of metals of I and II groups, 0.01-0.02; and water, the balance. EFFECT: high efficiency. 1 tbl