Simulating current sintering process in local brickkilns, Hengyang region, Hunan Province, China, at 800 degrees C, througt indoor sintering experiment on a series of brick samples of purple sandy shale, in which particle sizes of limestone are >-1 Phi, >0 Phi, >1 Phi, >2 Phi, >3 Phi and >4 Phi, respectively, it is concluded that the following: (1) Limestone granularity is a crucial factor affecting the quality of sintering bricks of purple sandy shale. Under different particle sizes, the critical content of limestone causing lime brust of sintering bricks is distinct, and lowers with the incr...
