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Aramoana Smelter
The Save Aramoana Campaign was formed in 1974 to oppose a proposed aluminium smelter at Aramoana in New Zealand. In the late 1970s Aramoana was proposed as the site of a major aluminium smelter by a consortium of New Zealand-based Fletcher-Challenge, Australia's CSR Limited and Swiss firm Alusuisse. An aluminium smelter was already operating at Tiwai Point when the smelter at Aramoana was proposed. Background From its inception, the Otago Harbour Board had vested in it for harbour purposes, land on the northern side of the Otago Harbour entrance. This included a quarry for rock to build the mole that protected the entrance; the village, originally housing workers on the mole, and later leased out for holiday homes; a large area of salt marsh; and adjacent dry-land leased out for rough grazing. After the Comalco Aluminium Smelter was opened at Bluff's Tiwai Point in 1971, Otago interests sought a similar project in 1974 on the OHB land at Aramoana. It was not well founde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
Smelting is a process of applying heat to ore, to extract a base metal. It is a form of extractive metallurgy. It is used to extract many metals from their ores, including silver, iron, copper, and other base metals. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind. The reducing agent is commonly a fossil fuel source of carbon, such as coke—or, in earlier times, charcoal. The oxygen in the ore binds to carbon at high temperatures due to the lower potential energy of the bonds in carbon dioxide (). Smelting most prominently takes place in a blast furnace to produce pig iron, which is converted into steel. The carbon source acts as a chemical reactant to remove oxygen from the ore, yielding the purified metal element as a product. The carbon source is oxidized in two stages. First, the carbon (C) combusts with oxygen (O2) in the air to produce carbon monoxide (CO). Second, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
