Uses of alternative fuels and raw materials in the cement ...
2013-7-1 · As depicted in Fig. 1, cement production is a multistage process that involves different activities , , , .First, the raw meal is conditioned; the limestone and some additives containing calcium (Ca), silica (SiO 2), aluminium (Al), and iron oxides (Fe 2 O 3) (among others) are crushed, ground, dried, and mixed.Then, this powder is heated in a pre-heater and pre
