缓冷与水淬高钛型高炉渣制备微晶泡沫玻璃的对比研究

Comparative Study on Preparation of Foam Glass-ceramics from Slow-cooling and Water-quenched High Titanium Blast Furnace Slag

利用高钛型高炉渣和废玻璃粉作为主要原料,采用发泡和析晶同步进行的"一步烧结法"制备微晶泡沫玻璃,可实现高钛型高炉渣高附加值整体利用且经济环保。分别采用缓冷、水淬两种高钛型高炉渣为原料制备微晶泡沫玻璃,对比研究了高钛型高炉渣添加量对微晶泡沫玻璃微观结构和性能的影响。研究结果表明:两种高钛型高炉渣添加量对微晶泡沫玻璃的影响规律类似,即随高炉渣添加量增加,微晶泡沫玻璃的孔径逐渐减小,孔隙率降低,体积密度和抗压强度逐渐增大;但是这两种高钛型高炉渣制备的微晶泡沫玻璃在微观形貌上有较大的差异,采用缓冷高钛型高炉渣制备的试样中含有较多不规整形状的连通孔,保温性能较差,降噪系数比水淬渣体系高29%,可用作轻质高强的吸声材料;而水淬高钛型高炉渣制备的微晶泡沫玻璃试样中多为较为圆整的闭孔,降噪系数较低,导热系数较缓冷渣体系低17%,用作轻质高强的保温隔热材料前景广阔。

High titanium blast furnace slag and waste glass powder were used to prepare foam glass-ceramics by"one-step sintering method",in which the foaming process synchronizes with the crystallization process.It can realize the high value-added overall utilization of high titanium blast furnace slag and is economical and environmentally sustainable.The effects of slow-cooling and water-quenched high titanium blast furnace slag on the preparation of foam glass-ceramics were studied.The results are as follows:the pore diameter and porosity of foam glass-ceramics gradually decrease,while the volum density and compressive strength gradually increase with increase of the addition amount of the two types of high-titanium blast furnace slag.The samples prepared from slow-cooling high titanium blast furnace slag has more irregular connected holes with a poor temperature insulation performance,while they have a noise reduction coefficient of 29%higher than that of the samples from water-quenched high titanium blast furnace slag which can be used as high strength sound absorption materials.The material prepared from water-quenched slag is mostly round closed pores with a lower noise reduction coefficient and better thermal insulation performance,which has a broad prospect for application to lightweight and high-strength thermal insulation materials.