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Probing into process complementation of oxidizing and acidifying roasting of zinc concentrates

Wang Fenghua Teng Chunbao Zhu Hongwen (Sulphuric Acid Branch,Huludao Zinc Plant,Liaoning,Huludao,125003,China)  
Dusts collected from boiler and cyclones during oxidizing roasting of zinc concentrate was incorporated into zinc concentrate that is fed to acidifying roaster instead of separate secondary roasting,to decrease environmental pollution and production cost.Through theoretic calculation and probing in production process,15%- 20%mixing ratio and appropriate operating conditions were determined,ensuring normal operation of acidifying roaster and zinc calcine quality.
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