Antimony Ore Beneficiation Plant

Stibnite Ore Beneficiation Plant

Stibnite (Sb₂S₃) is the primary sulfide mineral in antimony deposits. In a dedicated stibnite beneficiation plant, the ore is first crushed and ground to liberate the mineral from gangue. Gravity separation is often employed for coarse‑grained stibnite, using jigs or shaking tables to exploit its high density. For finer particles, froth flotation becomes the dominant method, where the sulfide is floated using collectors such as butyl xanthate or a mixture of shale oil and ethyl sulfide nitrogen, with terpineol oil serving as the foaming agent 2. This step yields a sulfide concentrate typically containing 10–16 % Sb, with recovery rates of 46–49 % under optimal conditions

Antimony Ore Beneficiation Plant

When processing mixed sulfide‑oxide ores, a comprehensive beneficiation plant integrates both gravity and flotation circuits. Oxide minerals, which are difficult to float, are separated by gravity concentration after the sulfide fraction has been removed. The combined approach ensures that both sulfide and oxide components are recovered efficiently, producing a mixed concentrate that may require further purification 4. Laboratory studies often simulate different scenarios to determine the best flowsheet for a given ore composition, balancing grade and recovery

Antimony Concentrator

An antimony concentrator focuses on maximizing the concentration of Sb in the final product. It typically consists of a primary crushing‑grinding circuit followed by gravity separation for coarse stibnite and flotation for finer sulfide particles. Advanced concentrators may incorporate electrostatic separation or ore sorting to improve selectivity, especially when the ore contains complex mineral associations such as pyrite, arsenopyrite, and galena 3. The concentrator’s design aims to achieve the highest possible Sb grade in the concentrate while minimizing energy and water consumption.

Antimony Ore Dressing Plant

The ore dressing plant (or dressing plant) refines the concentrate produced by the concentrator. After flotation, the concentrate undergoes thickening and vacuum filtration to dewater the slurry, producing a filter cake that can be further processed or sold as a concentrate. Some plants employ roasting or thermal oxidation to convert sulfide concentrates into oxide concentrates, which are then packaged for downstream metallurgical use 4. This stage ensures the final product meets industry standards for purity and particle size, facilitating its use in flame retardants, alloys, and semiconductor applications.

Main Equipment For Antimony Ore Beneficiation Plant

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Antimony Ore Crusher

Antimony Ore Ball Mill

Antimony Ore Classifier

Flotation cells