冲天炉熔化是铸造生产中主要环节之一。据资料统计,冲天炉每熔化1吨铸铁要排出废气600～800米~3,其中含有大量的粉尘及有害气体一氧化碳、二氧化碳、二氧化硫及氟化氢等。对污染环境、危害农作物和人体健康都极为严重。为了解决这一问题,我厂于1980年在新投产的3吨热风冲天炉中设计了湿法除尘及炉气净化处理装置。通过一年来的生产实践取得了一定效果,现总结于下。一、设计方案选择依据1.粉尘的组成及其粒度分布冲天炉排出的粉尘随着炉料的情况和炉前的操作方法不同而差异很大,焦碳的大小、灰粉的高低、铁料氧化程度以及风量风压的增减,都会使排出的粉尘浓度发生波动。冲天炉废气中含尘量为5600～12400毫克/米~3,大颗 Cupola melting is one of the main links in casting production. According to statistics, for each ton of cast iron melting the cupola, 600 to 800 meters to 3 meters of exhaust gas will be discharged from the cupola, which contains a large amount of dust and harmful gases such as carbon monoxide, carbon dioxide, sulfur dioxide, and hydrogen fluoride. It is extremely serious for polluting the environment, harming crops and human health. In order to solve this problem, our plant designed a wet dust removal and furnace gas purification treatment device in a new 3-ton hot air cupola in 1980. Through a year of production practice has achieved some results, are summarized in the next. First, the design program selection basis 1. Dust composition and particle size distribution The dust discharged from the cupola furnace varies greatly depending on the conditions of the charge and the method of operation in front of the furnace. The size of the coke, the height of the powder, iron oxide The degree and the increase or decrease in wind pressure will cause the concentration of discharged dust to fluctuate. The dust content in the exhaust gas of the cupola is 5600 to 12400 mg/m~3, large particles