A Method of Treating Cement Kiln Bypass Dust

摘要

A method of treating cement kiln bypass dust wherein the dust, comprising chlorides, is mixed with a liquid to form a solution in which the chloride compounds dissolve. The solution is then separated from the residual particulate matter which did not dissolved in the liquid. The liquid is preferably water and the process removes chloride salts such as potassium chloride (KCl) and sodium chloride (NaCl). The separation stage is preferably performed by filtering using a compression filtering device such as a membrane filter press. The flow of liquid for washing the dust is controlled and the chloride content of the separated solution is monitored. The process is stopped when the level of chloride in the solution reaches an acceptable level. The residual particulate matter is dried and introduced into the cement kiln as raw material for the production of cement.