Zinc oxide rotary kiln / zinc oxide volatilizes the characteristic that the oxide of the sulfide that kiln job principle uses lead and metallic zinc, cadmium, cadmium namely and lead has higher vapour pressure below high temperature, make the metal such as zinc, lead, cadmium is volatile with oxide configuration change, copper and precious metal turn into kiln broken bits, reoccupy another square broken bits are mixed from volatile kiln broken bits is small reclaim these metals. According to temperature gradient cent is dry belt inside kiln (700 ℃ of 600 ～ ) , warm-up is taken (℃ of 700 ～ 1 000) , reaction is taken (℃ of 1 200 of 1 100 ～ ) with cooling zone (650, 750 ℃ ) .
Zinc oxide rotary kiln uses fireproof data 1. Dry belt: Argillaceous brick, tall aluminous brick 2. Warm-up takes: Brick of tall aluminous brick, magnalium pointed spar 3. High temperature reaction takes: Special type phosphate is brick of brick, magnalium pointed spar, magnesian chromic brick, aluminous chromic brick 4. Cooling zone: Brick of tall aluminous brick, magnalium pointed spar
Fireproof data produces in the dip of service life zinc of zinc oxide rotary kiln broken bits volatilizes the high temperature reaction of kiln takes clay brick life to be only a few days or so, tall aluminous brick 10 arrive 20 days, magnalium brick a many month. Magnesia brick is day of 2 many months, aluminium magnesium brick 3 months above, useful phosphate is compound on the market now of the brick, system is in closely 2.8 above, with 5 months left and right sides.
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