PROCESS FOR TREATING PARTICULATE MATERIAL CONTAINING HEAVY METAL AND AN ADDITIVE FOR USE IN SUCH PROCESS

摘要

A process for treating particulate material containing heavy metal generated during a manufacturing process is disclosed. The process includes providing particulate material containing heavy metal within an enclosed are a and mixing an additive of calcium silicate forming material with the particulate material in the enclosed area to create an additive-particulate material. Th e additive-particulate material can be passed into a waste collection device located downstream of the enclosed area. The calcium silicate forming material can b e provided as particles with a particle size of minus 50 to plus 325 mesh. An additional aspect of the invention is an additive for use in such a process for treating metallic oxide impregnated dust, which has a particle size of plus 325 mesh and consists essentially of calcium silicate forming material.