Patent ID: 8075666
Filing Date: 2011-12-13
Classification: C22B,Y02P

Abstract:
1. A process for treating particulate material containing heavy metal oxides generated during a manufacturing process comprising: providing particulate material containing heavy metal; and mixing particulate calcium silicate forming material with the particulate material containing heavy metal at a mixing site to create an additive-particulate material blend wherein the particulate calcium silicate forming material comprises particles having the following size fraction ranges: minus 50 to plus 60 mesh: 10-20% by weight minus 60 to plus 70 mesh: 5-15% by weight minus 70 to plus 80 mesh: 2-10% by weight minus 80 to plus 100 mesh: 5-15% by weight minus 100 to plus 140 mesh: 10-20% by weight minus 140 to plus 170 mesh: 5-15% by weight minus 170 to plus 300 mesh: 40-50% by weight.