烟气净化副产物制备陶粒的试验*

工业烟气超低排放带来烟气净化副产物种类和数量的急剧增加，因此产生了烟气净化副产物难以综合利用的问题。基于烧制陶粒的基本成分分析，以烟气净化治理过程中捕集的除尘灰为成陶原料，以失效的活性焦为产气成分，并通过掺混黏土来调节原料配比，采用L9（33）正交设计方法进行陶粒的烧制试验研究。研究结果表明，在黏土占41.7%～45.5%、活性焦占4.5%～8.3%和除尘灰占50.0%的原料配比下，在100 ℃干燥30 min、400 ℃预热15 min、1 150 ℃焙烧15 min和自然冷却的焙烧制度下，烧制出的陶粒的堆积密度、筒压强度、1 h吸水率和重金属浸出浓度均满足国家标准。

Test on Preparation of Ceramsite from By Products of Gas Cleaning System

The ultra low emission of industrial flue gas has brought about a sharp increase in the types and quantities of by products of gas cleaning system.However,it brings about difficults of recover and utility the by products effectively.Based on the component analysis of the haydite,precipitator dust,used as the pottery component,and expired activated coke,used as the gas component,were mixed with clay for a suitable ratio of raw materials.The L9（33）orthogonal experiment model was selected in the firing process of ceramsite.The results showed that the optimum proportion was 41.7%～45.5% of clay,4.5%～8.3% of expired activated coke and 50.0% of precipitator dust in quality,and the optimum roasting system was drying at 100 ℃ for 30 minutes,preheating at 400 ℃ for 15 minutes,roasting at 1 150 ℃ for 15 minutes,and natural cooling.The bulk density,cylindrical compress strength,water absorption in 1h and leaching concentration of heavy metal of the fired ceramsite all met the national standards.