焚烧灰玻璃固化处理工艺条件初探

Preliminary study on vitrification process conditions of incineration ash

在对国内外玻璃固化体配方进行调研和分析的基础上,结合具体的处理对象和处理要求,将模拟焚烧灰与一定种类以及质量比的添加剂进行混合后高温熔融,形成了玻璃固化体。固化体表观坚硬、光滑且致密,密度在2.6 g/cm^3以上。经X射线衍射法(XRD)检测,样品为均匀的玻璃态物质。证明焚烧灰利用高温熔融方法,得到玻璃固化体的处理工艺可行。同时,焚烧灰的熔融温度随着玻璃添加剂中硼砂含量的增加而降低,熔融态的流动性和成型效果也明显改善。最终,实验初步得到焚烧灰熔融处理的工艺条件为:当B2O3和Na2O的添加量在30%~35%之间时,处理温度应至少保持在1100℃以上;当B2O3和Na2O的添加量达到40%时,处理温度可以降低至1000℃或更低。最后,以真实焚烧灰在相同处理条件下进行实验,得到了相似的结果。

A kind of solidified glass is prepared with simulated incineration ash and additives in certain proportion based on research and analysis of domestic and foreign vitrification formulas which combines our specific processing objects and processing requirements.The solidified glass is apparently hard,smooth,dense with a density of higher than 2.6 g/cm^3 and shows a uniform glassy substance in XRD tests,and thus proves a feasible melting process of incineration ash treatment.Experimental results show that the melting temperature of incineration ash decreases with the increase of borax content of additive and the fluidity and molding effect are also significantly improved.Experimental conditions for the initial incineration ash melting treatment are as follows:the treatment temperature should be higher than 1100℃when the addition amount of B2O3 and Na2O was 30%-35%;the treatment temperature can be lowered to 1000℃when the addition amount of B2O3 and Na2O reaches 40%.Experiments of real incineration ash under the above mentioned same processing conditions obtained same results.