Antimony processing involves several methods to extract and refine the metal for various industrial applications. The primary techniques include pyrometallurgical and hydrometallurgical processes, each tailored to the ore type and desired purity. Pyrometallurgy is the most common, involving high-temperature treatments to separate antimony from its ores. The ore is first crushed and concentrated, then roasted to convert sulfides into oxides. This is followed by reduction with carbon or iron to produce crude antimony, which is further refined through smelting or liquation to achieve higher purity.
Hydrometallurgical methods are less common but are gaining attention due to environmental concerns. These processes use chemical solutions to dissolve antimony from ores, followed by precipitation or electrolysis to recover the metal. For example, alkaline leaching with sodium sulfide or acidic leaching with hydrochloric acid can extract antimony, which is then purified through electrowinning or cementation. These methods are particularly useful for low-grade ores or complex mineral associations. 
Antimony finds applications in flame retardants, alloys, batteries, and semiconductors. In flame retardants, it synergizes with halogens to enhance fire resistance in plastics and textiles. In alloys, it hardens lead for use in batteries and ammunition. Its semiconductor properties make it valuable in infrared detectors and diodes. Each application demands specific purity levels, influencing the choice of processing method.
The environmental impact of antimony processing is a growing concern, prompting research into cleaner technologies. Recycling antimony from end-of-life products is also becoming important to reduce reliance on primary extraction. Advances in hydrometallurgy and bioleaching offer promising alternatives to traditional smelting, minimizing emissions and waste. 
In summary, antimony processing relies on a combination of pyrometallurgical and hydrometallurgical techniques tailored to ore characteristics and end-use requirements. The metal's versatility drives demand across multiple industries, while environmental considerations push innovation toward sustainable extraction methods.