铝业赤泥免烧砖中试生产及产业化

利用铝厂赤泥、自备电厂粉煤灰、矿山石渣为主要原料在国内第一条赤泥砖生产线上进行了中试生产,采用了自然养护和蒸压养护两种生产工艺。自然养护的赤泥免烧砖达到了非烧结普通粘土砖标准(JCT4221991)(1996)中15级要求,蒸压养护的赤泥免烧砖达到了蒸压灰砂国家标准(GB119451999)中优等品MU15级的要求。通过成本核算,自然养护的赤泥免烧砖的生产成本能够控制在0.11元块以下,蒸压养护的赤泥免烧砖的生产成本能够控制在0.14元块以下,具有较好的经济性。

PILOT-SCALE PRODUCTION AND INDUSTRIALIZATION OF THE NO-FIRED BRICKS FROM RED MUD IN ALUMINIUM INDUSTRY

A first pilot line for no-fired brick,made from red mud,fly ash,and small particles from crashed CaCO_3 ores,has been developed.The red mud bricks were produced by two curing processes.The red mud bricks curing at ambient conditions,reach the standard of grade 15 high quality products(JC/T 422-1991(1996));and the red mud bricks curing at high pressure water vapor curing process,reach the standard of MU15 high quality products(GB11945-1999).According to the cost-benefit analysis,the cost of the brick can be controlled under A first pilot line for no-fired brick,made from red mud,fly ash,and small particles from crashed CaCO_3 ores,has been developed.The red mud bricks were produced by two curing processes.The red mud bricks curing at ambient conditions,reach the standard of grade 15 high quality products(JC/T 422-1991(1996));and the red mud bricks curing at high pressure water vapor curing process,reach the standard of MU15 high quality products(GB11945-1999).According to the cost-benefit analysis,the cost of the brick can be controlled under $0.11/block,in the curing process at ambient conditions;and the cost of the brick can be controlled under $0.14/block,in the high pressure water vapor curing process.The results show that the no-fired bricks from red mud have good economic benefits.