Preventing Sintering Bricks of Purple Sandy Shale from Lime Brust: Experimental Research on Fixing Calcium with Sulfur
Simulating current sintering process used by the brickkiln, at 800 °C, i.e. calcination temperature of the marginal area of the brickkiln, this work conducted experimental research on preventing sintering bricks of purple sandy shale from lime brust through fixing free CaO in sintering bricks with sulfur of high-sulfur coal. It is concluded that the critical content of CaCO3 in purple sandy shale, causing lime brust of sintering bricks, is 24% by weight, when it is below this, lime brust commonly doesn’t occur; sulfur of high-sulfur coal (if necessarily, adulterated with pyrite ore) may effectively lower the concentration of free CaO in sintering bricks, accordingly eliminate or weaken lime brust; in condition of current market price of pyrite ore, the sintering process fixing free CaO with sulfur in pyrite ore is economically feasible.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Z. G. Feng et al., "Preventing Sintering Bricks of Purple Sandy Shale from Lime Brust: Experimental Research on Fixing Calcium with Sulfur", Advanced Materials Research, Vols. 189-193, pp. 580-584, 2011