Tungsten bars, rods, profiles and profiles plates, sheets, strip and foil of a deeper level of processing products export tariffs, so the 5% export tax rebate policy will continue. It can be understood, at least for now, for this type of tungsten production and exports, the country is still allowed, and even encouraged.
2013年7月23日星期二
Molybdenum wire scrap recycling
Molybdenum is a refractory metals. Gray surface gloss, high melting point. Strong binding force between atoms at room temperature, high temperature, high strength, expansion of small, high conductivity, good heat dissipation; therefore molybdenum wire scrap recycling is a major refining "Mo" materials, waste molybdenum wire through: Roasting and acid, alkali treatment refining "Mo" metallic. Recycling of waste Molybdenum tube can be used to produce industrial molybdenum oxide, molybdenum, ammonium molybdate, and other such. Molybdenum wire scrap recycling, especially from the spent catalyst obtained molybdenum in molybdenum production occupies an important position, known as the second largest source of supply of molybdenum (the largest source of byproduct molybdenum, the second largest source of primary molybdenum production). Since a wide variety of molybdenum-containing waste, recycled in different ways, molybdenum regeneration methods are commonly used: the sublimation method, zinc and alkaline leaching melting method, etc., generally 96-98% recovery of molybdenum. Molybdenum wire scrap recycling plant waste molybdenum wire according to the composition and refining plant-specific conditions select or develop appropriate methods to obtain a higher economic efficiency.
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