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

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.