The fluoride gases are separated from the main product by channeling them through a bed of aluminium oxide where fluoride is soaked up. The particulate material is then placed in a fabric filter bag-house. The product (alumina having fluoride) is taken back to the main processing line of manufacturing aluminium. The fluoride gases are used for making uranium, and other fluorochemicals. According Alcoa’s website, it manufactures about 47% and 30% of Australia’s alumina and aluminium respectively. The company’s alumina production represents 11% of the worldwide demand.
The people working in the pot rooms are usually exposed to various hazards. Volatile chemical compounds from baking anodes in the Soderberg process, exposure to the fluorides gases, and other dusts and gases including carbon monoxide and sulphur dioxide are potential health hazards. Physical hazards include prolonged exposure to magnetic fields, noise pollution, and exposure to radiant energy. Carrying out efficient work and transportation practices reduces the hazards.
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