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本专利适用于黑色、有色冶金中烧结混合料(矿粉、精矿粉)的预热。在球团生产中,本专利也应用于任何水份的造球原料的预热。已有的混合料预热方法是靠热返矿的热量。然而,在采用热返矿预热的工厂里,混合料的温度在烧结前一般不超过55℃,所以不能保证完全排除水份的冷凝以及过湿带的形成。从理论上来讲,只有当混合料温度不低于80～82℃时,才不会出现水分冷凝而形成过湿带。除此以外,这种预热方法,一般来说劳动卫生条件都较差。
This patent applies to black, non-ferrous metallurgy sintering mixture (ore powder, concentrate powder) preheating. In pellet production, this patent is also applied to the preheating of pellets of any water content. Existing methods of preheating the mixture depend on the heat of the heat recovery. However, in plants that use hot-pick-up preheating, the temperature of the mix does not generally exceed 55 ° C prior to sintering, so complete removal of moisture condensation and over-wet band formation can not be guaranteed. In theory, only when the mixture temperature is not less than 80 ~ 82 ℃, it will not appear moisture condensation to form a wet zone. In addition, this preheating method, in general, has poor sanitary conditions.