Smelting - Encyclopedia. com Smelting caused much of the ecological damage via acid rain and elevated levels of copper and nickel in the vicinity of the smelters Efforts by government and industry since the 1970s have eliminated most of the sulfur dioxide emissions in the area, and there has been significant progress toward achieving sustainable ecosystems
Smelters - Encyclopedia. com Smelting is a method of separating gold, silver, and other metals from their ores with fire and heat intense enough to melt the ores A Spanish law of 22 August 1584 required a government smelter to be established in every mining district in the New World and required all miners to bring their gold and lead-silver to a government furnace
The Hudson Bay Mining and Smelting Company, Limited The Hudson Bay Mining and Smelting Company, Limited, is a major Canadian producer of copper and zinc which operates mines and metal processing facilities in remote areas of the province of Manitoba The company has been removing metals from the ground for most of the twentieth century, and its efforts to industrialize western Manitoba have
Slag - Encyclopedia. com slag slag • n 1 stony waste matter separated from metals during the smelting or refining of ore ∎ similar material produced by a volcano; scoria
Mitsui Mining Smelting Co. , Ltd. | Encyclopedia. com MMS was created as Kamioka Mining Smelting Co , Ltd , in 1950 when Mitsui Mining Company was forced to dissolve by the Allied occupation forces in Japan Mitsui Mining was one of the oldest and most important of the many affiliates of the Mitsui zaibatsu, or conglomerate, its large coal mines having first been acquired by the parent company
Abraham Darby - Encyclopedia. com He had worked for a while in the copper smelting industry and observed that coke was used in that smelting process with success Coke burned hotter and more steadily than coal and sustained the higher temperatures needed for smelting Darby began to think about an iron smelting operation that would incorporate coke rather than coal
Lead Industry - Encyclopedia. com About 1895, natural gas discoveries were made in the Kansas and Oklahoma part of the Joplin, or tristate, district, providing cheap fuel for zinc smelting and further stimulating mining activities Since lead was a coproduct of zinc in the ore, lead production also grew, allowing several smelters to be constructed in the area and in the
Iron Mining and Metallurgy | Encyclopedia. com Fueling even a small ironworks required a large area of forest, as charcoal production was a necessary step preliminary to the smelting process A colonial blast furnace produced approximately 400 tons of pig iron per year (2 tons of ore could be smelted into 1 ton of pig iron), with each ton requiring between 100 and 120 cords of wood as fuel
Metallurgy through the Ages | Encyclopedia. com The first smelting of iron probably occurred in Anatolia, part of modern Turkey, in 2000 b c But pure iron is fragile, and the first uses of iron were generally ornamental A breakthrough occurred with the development of coking, which allowed melting at lower temperatures and provided a harder, more durable version of the metal (really a
Blast Furnace - Encyclopedia. com blast furnace, structure used chiefly in smelting [1] The principle involved in this means of extracting metals is that of the reduction of the ores by the action of carbon monoxide [2], i e , the removal of oxygen from the metal oxide in order to obtain the metal