发明申请
- 专利标题: METHOD FOR MASS PRODUCTION OF PHOSPHORIC ACID WITH ROTARY KILN
- 专利标题(中): 用旋转窑生产磷酸的方法
-
申请号: US14958893申请日: 2015-12-03
-
公开(公告)号: US20160152472A1公开(公告)日: 2016-06-02
- 发明人: Yonghe HOU , Shifa WEI
- 申请人: SICHUAN KO CHANG TECHNOLOGY CO., LTD
- 优先权: CN201310218484.2 20130604
- 主分类号: C01B25/18
- IPC分类号: C01B25/18
摘要:
A method for mass production of phosphoric acid with a rotary kiln, comprising the following steps: pretreating raw materials a carbonaceous reductant; preparing the pre-treated carbonaceous reductant powder; then evenly mixing the carbonaceous reductant powder and the silica powder to obtain a cladding material; mixing the cores and the cladding material for cladding treatment, drying and solidifying same to obtain composite pellets; sending the composite pellets into a rotary kiln for a reduction reaction; sending the high-temperature slag balls exiting the rotary kiln to a cooling device for comprehensive utilisation; introducing the fume containing P2O5 and fluorine exiting the kiln into a hydration tower for absorbing phosphorus by hydration, then passing same through a phosphoric acid mist capturing tower and a mist removing and separating tower successively, and the fluorine-containing fume discharged from the mist removing and separating tower entering a subsequent fluorine recovery procedure.