从铁合金生产中排出的是一种有害废渣,而且排放量日益增加,对环境造成极大危害.本研究采用铁合金厂排放的含铬废渣,将废渣与镁砂以不同比例混合,测试了试样的体积密度、气孔率、常温耐压强度等常温性能,并用电镜对部分试样进行显微结构观察和矿物成分分析.结果表明:铬渣镁砂复合耐火材料的生产是可行的,在经过烧成后材料中生成大量的尖晶石和镁橄榄石相,试样的性能良好,完全可满足耐火材料使用的要求.当铬渣的加入量超过40%(质量分数, 下同)时,复合材料的性能下降较大,综合各项指标来看,为保证使用性能,铬渣的加入量应小于40%.
The quantity of waste slag from ferro-alloy production is increasing heavily. It is a great danger to environmental safety as harmful wastes. The samples were prepared by mixing magnesite and chromium waste slag which is from ferro-alloy factory in different ratio. Bulk density, porosity, compressive resistance at room temperature of the samples were tested and also the microstructure and mineral facies of parts of sample were observed by SEM. The results show that it is feasible to produce compound refractory by chromium slag and magnesite. With large quantity of spinel and forsterite phases in the sintered material, the test sample has high performance to meet service demand of refractory completely. But the performance fall sharply when the amount of chromium slag is above 40wt%. The chromium slag quantity added to compound materials should be less than 40wt% for quality assurance according to aggregative indicator.
参考文献
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| [3] | 肖汉宁,时海霞,陈钢军.利用铬渣制备微晶玻璃的研究[J].湖南大学学报（自然科学版）,2005(04):82-87. |
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