Rotary Kilns
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viki refractory works manufacturing rotary kiln and supplies. the moist material moves through the rotary kiln, it is dried and preheated by the kiln gas, flowing in a counter-current pattern. in the reaction zone, reduction of the metal oxides occurs around 1200ã‚â°c as the zinc is vaporized as metal vapor into the gas cleaning system. zinc is then re-oxidized in the kiln atmosphere that is operated with excess air (process air is injected from the kiln end).