
Antimony is a chemical element with the symbol Sb from Latin stibium and atomic number 51. Many antimony ores are sulfides, including stibnite Sb of the antimony is imported from China, which is a significantly high concentration ofnbsp. This article covers a hydrometallurgical method for processing of a gold-antimony flotation concentrate in alkaline sulfide solutions. Thermodynamic analysis of the reaction stibnite with sulfide sodium and sodium hydroxide was performed. The chemical and phase compositions of the investigated material, mainly represented by compounds of antimony, silicon, calcium, sulfur and iron are studied.