不同添加剂对废弃SCR催化剂熔融无害化处理的影响

Influence of Different Additives on Harmless Melting Treatment of Waste SCR Catalysts

研究了1 300℃高温下不同添加剂对废弃SCR催化剂高温熔融处理的影响,分别考察了3组不同添加剂及不同添加质量分数对熔渣的影响.结果表明:在1 300℃高温下,高温熔融法对废弃SCR催化剂有很好的稳定效果;当C组添加剂的质量分数为40%时(Fe2O3、SiO2、CaO和Al2O3的质量分数分别为31.2%、2.64%、5.2%、0.96%),熔渣中重金属Ni、As、Se、Cu和Mn的浸出质量浓度分别减小了98.6%、68.0%、96.8%、11.1%和77.3%.

To study the effects of different additives on high-temperature melting treatment of waste SCR catalysts at 1 300℃,an analysis was conducted on the composition of molten slag respectively obtained by using three different additives of different mass fractions.Results show that the waste SCR denitration catalysts can be effectively stabilized by the way of high-temperature melting at 1 300 ℃.When the proportion of group C additives is 40 %（Fe2O3 31.2%,SiO2 2.64%,CaO 5.2% and Al2O3 0.96%）,the leaching toxicity of heavy metals Ni,As,Se,Cu and Mn can be reduced by 98.6%,68.0%,96.8%,11.1%and 77.3%,respectively.