What is cement kiln dust and how is it used in the manufacturing process?
A. Cement kiln dust, or CKD, is created during the third stage of manufacturing when clinker is formed. Electrostatic and bag filters capture the dust for recycling. The industry recycles more than 75 percent of cement kiln dust nearly eight million tons each year directly back into the cement kiln as raw material. Recycling this byproduct also reduces the need for limestone and other raw materials and helps conserve energy. Other uses for CKD include agricultural soil benefaction and soil stabilization.
