发明申请
WO2015092503A1 PROCESS AND INSTALLATION FOR PRODUCING ALUMINA TRIHYDRATE BY ALKALINE DIGESTION OF BAUXITE ORE
审中-公开
基本信息:
- 专利标题: PROCESS AND INSTALLATION FOR PRODUCING ALUMINA TRIHYDRATE BY ALKALINE DIGESTION OF BAUXITE ORE
- 专利标题(中):通过碱金属碱处理生产三氧化二铝的工艺和安装
- 申请号:PCT/IB2014/002606 申请日:2014-11-28
- 公开(公告)号:WO2015092503A1 公开(公告)日:2015-06-25
- 发明人: REID, Michaël , PELOQUIN, Guy , ST-LAURENT, Matthieu , RACINE, Philippe
- 申请人: RIO TINTO ALCAN INTERNATIONAL LIMITED
- 申请人地址: 1188 Sherbrooke Street West Montreal, Quebec H3A 3G2 CA
- 专利权人: RIO TINTO ALCAN INTERNATIONAL LIMITED
- 当前专利权人: RIO TINTO ALCAN INTERNATIONAL LIMITED
- 当前专利权人地址: 1188 Sherbrooke Street West Montreal, Quebec H3A 3G2 CA
- 优先权: EP13006035.3 20131220
- 主分类号: C22B3/04
- IPC分类号: C22B3/04 ; C01F7/14 ; C22B3/20 ; C22B21/00
摘要:
A process for producing alumina trihydrate comprising an digestion step (26), a separation step (70), and a precipitation step (52) the separation step including: b1) pretreating a slurry from the digestion step by adding a fiocculant to said slurry and mixing the fiocculant and the slurry, b2) settling the resulting flocculated slurry in a gravity settler vessel, b3) determining a measured value representative of the concentration of solid particles in the resulting clarified liquor, b4) comparing the measured value with a predetermined threshold, b5) feeding said clarified liquor directly to the precipitation step (52), while the measured value is less than said predetermined threshold, and b6) redirecting said clarified liquor to the pre-treatment step b1), when the measured value is more than said predetermined threshold. An installation for operating said process.
摘要(中):
一种生产氧化铝三水合物的方法,包括消化步骤(26),分离步骤(70)和沉淀步骤(52),所述分离步骤包括:b1)通过向所述浆料中加入絮凝剂,从消化步骤中预处理浆料, 将絮凝剂和浆料混合,b2)将所得絮凝浆料沉淀在重力沉降器容器中,b3)测定代表所得澄清液体中固体颗粒浓度的测量值,b4)将测量值与预定阈值进行比较, b5)将所述澄清液直接进入沉淀步骤(52),同时测量值小于所述预定阈值,以及b6)当所述测量值大于所述预处理步骤b1)时,将所述澄清液重定向到所述预处理步骤b1) 预定阈值。 用于操作所述过程的安装。
IPC结构图谱:
C | 化学;冶金 |
--C22 | 冶金(铁的冶金入C21);黑色或有色金属合金;合金或有色金属的处理 |
----C22B | 金属的生产或精炼;原材料的预处理 |
------C22B3/00 | 用湿法从矿石或精矿中提取金属化合物 |
--------C22B3/04 | .通过浸取 |