Abstract: Quattamia cement plant (Suez Cement Company) uses as raw materials a local Q clay, red clay and limestone. The largest part of alkalies contains Q clay (9.58%). Daily clay input makes up 2292 t and accordingly 95 t d-1 alkalies drowns into cement kiln, the biggest part into by-pass dust which contains minerals (galite, thermonatrit) with dimensions 23-52 mcm. The alkalies presence leads to cement strength and water proof decreasing. The problem solution consists of using the Multiproductive Staged Classifiers (MSC) which permits to divide any powder into some necessary fractions according to particles density and dimension. Experimentally Q clay was being cleaned from alkalies using 3-staged MSC. The first stage catces clay particles, the second sulfates, the third chlorides, oxides and hydroksides. Light particles caught by filter. Using 2-staged MSC for BPD classification permitted to get 89.37 mass % of clinker-forming materials and 9.41 mass % of alkalies, small particles were caught by filter. Carried out investigations and natural testing convince in possibilities: of cleaning Q clay from alkalies that leads to cement quality rising as much as approximately 20% and BPD cleaning from alkalies that results in 90% clinker-generated return to cement production as raw materials, environment protection is fulfilled in both cases.
Natalya V. Klyuchnikova, Vyacheslav I. Pavlenko and Sergey S. Vaysera, 2015. An Effective Cleaning Method of Cement Clinker from Alkaline Earth Metals. Research Journal of Applied Sciences, 10: 603-607.