![METHOD FOR LEACHING RECOVERY-BOILER ASH](/abs-image/US/2016/10/06/US20160289793A1/abs.jpg.150x150.jpg)
基本信息:
- 专利标题: METHOD FOR LEACHING RECOVERY-BOILER ASH
- 专利标题(中):浸取回收锅炉的方法
- 申请号:US14442165 申请日:2013-11-15
- 公开(公告)号:US20160289793A1 公开(公告)日:2016-10-06
- 发明人: Paterson McKEOUGH
- 申请人: ANDRITZ Oy
- 优先权: FI20126204 20121116
- 国际申请: PCT/FI2013/000043 WO 20131115
- 主分类号: C22B26/10
- IPC分类号: C22B26/10 ; D21C9/10 ; D21C11/00 ; C22B7/00
摘要:
A method to be used in conjunction with a single-stage or multi-stage process for leaching ash originating from the recovery boiler of a pulp mill, particularly when the ash contains a significant amount of carbonate, wherein calcium compounds, such as calcium oxide (CaO) or calcium hydroxide (Ca(OH)2), are employed as additives in one or more leaching stages, a liquid fraction formed in the leaching process is utilized outside the main chemical recovery cycle, such as a substitute for purchased sodium hydroxide in the bleaching line of the pulp mill, and a solids fraction may be mixed with a black-liquor stream of the mill or subjected to further processing to separate calcium compounds for recycle.
摘要(中):
一种与用于来自纸浆厂的回收锅炉的沥青的单级或多级方法结合使用的方法,特别是当灰含有大量碳酸盐时,其中钙化合物如氧化钙( CaO)或氢氧化钙(Ca(OH)2)在一个或多个浸出阶段用作添加剂,在主要化学品回收循环之外使用在浸出过程中形成的液体馏分,例如购买的氢氧化钠 纸浆厂的漂白生产线和固体部分可以与研磨机的黑液流混合或进行进一步加工以分离用于再循环的钙化合物。
公开/授权文献:
- US09719209B2 Method for leaching recovery-boiler ash 公开/授权日:2017-08-01
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 |
------C22B26/00 | 碱金属、碱土金属或镁的提取 |
--------C22B26/10 | .碱金属的提取 |