钢渣制备烧结砖过程钢渣粒度与试样微观结构关系

In this paper, the steel slag sintered brick were prepared with the raw materials of steel slag and clay.The sintered brick prepared at the 1150 C sintering temperature , when the steel slag particle size <0.075mm,the water absorption and compressive strength of the samples can up to 0.17% and 344.8MPa respectively, which far exceeding the national standard of clay brick. This paper analyses the influence of steel slag and grain size on sintering process the performance of sample study found that the smaller the particle size of steel slag samples, the lower of sintering temperature is.The water absorption of the samplessdecrease with decreasing rate of steel slag particle size decreasedat the same sintering temperature.The compressive strength of the sample increased first and then decreased with the increase of sintering temperature in the same grain size range. The liquid phase of samples increased, the samples began to melt, and internal deformation when the sintering temperature is higher than that of burning the temperature. At the same timethe inside crystalgrowth will hinder the diffusion of liquid phase which leads to the hindering of gas dischage, resulting in a large number of pores appeared in samples and the compressive strength reduced.