Exploring Dry-out Behaviour and Explosion Resistance of Microsilica-gel Bonded No-cement Castables  

作　　者：Hong PENG 

机构地区：[1]Elkem Silicon Products Development,Kristiansand 4621,Norway

出　　处：《China's Refractories》2024年第3期15-21,共7页中国耐火材料（英文版）

摘　　要：Cement-free castables have attracted significant attention due to their superior thermal-mechanical properties and rapid dry-out in comparison to cement-bonded refractory castables.However,drying industrial-scale specimens can pose more challenges than lab-scale samples.In this study,the dry-out behavior and explosion resistance of microsilica-gel bonded nocement castables(NCCs)were investigated on both lab-and industrial-scale specimens,employing various drying agents.First,the fast dry-out mechanism was assessed using thermogravimetric analysis(TGA),differential scanning calorimetry(DSC),and scanning electron microscopy(SEM)on lab-scale small samples.Then,the drying behavior of industrial-scale large samples(300 mm×300 mm×300 mm cubes,approximately 80 kg)was studied using a unique macro-thermo-balance(macro-TGA).The results showed that EMSIL-DRY^(®)reduced the temperature level for maximum dewatering rate and effectively prevented explosions during heat-up,compared to other polymer fibres.The use of a specialty drying agent(EMSIL-DRY^(®))significantly improved the explosion resistance,as demonstrated by the production of a perfect 400 kg block fired to 850℃at a rate of 50℃·h^(-1).This research contributes to the understanding and application of cement-free castables in industrial settings.

关 键 词：rapid dry-out microsilica-gel bond no-cement castable(NCC) EMSIL-DRY^(®) 

分 类 号：TQ175.732[化学工程—硅酸盐工业]