Effect of sintering technology on properties of coal gangue permeable brick
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With the continuous mining of coal resources, a large amount of coal gangue is produced, the ecological environment isseverely damaged, and the numerous resource wastage is produced. Therefore, the comprehensive utilization of coal gangueshould be studied. In this paper, the effect of heating rate, the sintering temperature and the holding time on the performanceof permeable bricks is explored, and the following conclusions are drawn. The coal gangue raw materials were ball milledand sieved with a particle size of 100 meshes, the best foaming effect is used to mixed powder ball mill foaming with speed80 r/min and 3 h ball milling, the firing system is heating rate 2.5 ℃/min, the sintering temperature 1050 ℃, the holdingtime is 60min, the performance of permeable brick is the best. After improving the sintering process, the apparent porosityof the permeable brick can reach 55.1%, the compressive strength is 1.42 MPa, and the water permeability coefficient is1.65×10-2 cm/s.
Abstract
With the continuous mining of coal resources, a large amount of coal gangue is produced, the ecological environment isseverely damaged, and the numerous resource wastage is produced. Therefore, the comprehensive utilization of coal gangueshould be studied. In this paper, the effect of heating rate, the sintering temperature and the holding time on the performanceof permeable bricks is explored, and the following conclusions are drawn. The coal gangue raw materials were ball milledand sieved with a particle size of 100 meshes, the best foaming effect is used to mixed powder ball mill foaming with speed80 r/min and 3 h ball milling, the firing system is heating rate 2.5 ℃/min, the sintering temperature 1050 ℃, the holdingtime is 60min, the performance of permeable brick is the best. After improving the sintering process, the apparent porosityof the permeable brick can reach 55.1%, the compressive strength is 1.42 MPa, and the water permeability coefficient is1.65×10-2 cm/s.