公开(公告)号：US11478672B2

公开(公告)日：2022-10-25

申请号：US16809685

申请日：2020-03-05

Applicant: Kunming University of Science and Technology

Inventor： Ping Ning ,  Bin Li ,  Liwei He ,  Zhang Lin ,  Xueming Liu

IPC: A62D3/36 ,  C22B7/04 ,  A62D3/37 ,  C22B34/32 ,  A62D101/40

Abstract: The present invention discloses a method for detoxifying chromium slag by using high sulfur coal. The method includes: sieving chromium slag into coarse-grained chromium slag and fine-grained chromium slag, air-drying and crushing both the coarse-grained chromium slag and the fine-grained chromium slag; separately mixing the crushed coarse-grained chromium slag and fine-grained chromium slag with the crushed high sulfur coal uniformly; adjusting pH values of a coarse-grained slag mixture and a fine-grained slag mixture to 8.0-11.0 and moisture content thereof to 12%-18%; conducting reduction on the treated coarse-grained slag mixture and fine-grained slag mixture, where the reduction temperature of the fine-grained slag mixture is 500-700° C., the reduction time of the fine-grained slag mixture is 10-30 min, the reduction temperature of the coarse-grained slag mixture is 800-1000° C., the reduction time of the coarse-grained slag mixture is 10-30 min; after the reduction, conducting water quenching, and discharging the product.