Treatment of solid material

Details Treatment of solid material Treatment of solid material

B - Operations, Transporting

09

B

B09B 3/00 (2006.01) C01D 7/00 (2006.01) C01F 11/22 (2006.01) C22B 7/00 (2006.01) C22B 21/00 (2006.01) C25C 3/08 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2118943

A process for treatment of a solid material containing fluoride and sodium, such as spent pot-lining from aluminium reduction cells, comprising the following steps: I) contacting the solid material (10) with recycled caustic liquor (14) and source of calcium (12) is a digestor (1); 2) passing the mixture to a separating device (2) to separate into liquid (18) and solid fraction (16); 3) recycling part of the liquid fraction (20, 14) containing caustic concentration of 75-200 g/l, calculated as Na2 CO3 to step (1)and 4) recovering concentrated caustic liquor (22) of concentration 180-300 g/l from liquid fraction (18). The product of the process is a solid residue having low levels of leachable fluoride and a concentrated caustic liquor.

Affiliated with

Also associated with

Rating

Treatment of solid material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Treatment of solid material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Treatment of solid material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1783268