Calamine brass Calamine brass Calamine brass is brass produced by a particular alloying technique using the zinc ore calamine directly, rather than first refining it to metallic zinc. Direct zinc smelting appears to have been unknown in Europe until the mid-18th century, even though the alloyed calamine brass was in use for centuries, and metallic zinc was produced directly via reducing-atmosphere smelting in India and China from the 12th century CE onwards. Brass is an alloy of copper and zinc and, when it was first developed, methods for producing metallic zinc were unknown. Metallurgists wishing to produce brass thus used calamine (actually
Thermo Electric Ore Reduction Corporation Mill the Hodgkinson River scattered over the surface as bunches in quartzose boulders or in drifts interspersed with coarse gravels. In 1900, 91 pounds of molybdenite was also discovered. This was said to contain some of the finest specimens of molybdenite discovered anywhere in Australia. Wolfram is composed of a heavy gray-white metallic element, with pure wolfram being used mainly in electrical applications and is also the ore from which tungsten is refined. In 1899 wolfram was returning £38 per ton. Other than along the Hodgkinson, wolfram has been located in north Queensland at Bamford Hill approximately west-south-west of Cairns in