我厂20m~3炼铁高炉是由炼铁高炉改造成的,七一年投产,年产8000吨,全部是铸造生铁。原料一直搭用天然焦、硫酸渣。由于使用初期对其性能不了解,造成炉况不顺,炉瘤形成很快,严重时一个月要炸两次炉瘤,严重影响炼铁生产。经过几年的不断实践,终于掌握了天然焦和硫酸渣炼铁的基本特点,获得良好效果。下面谈谈搭用天然焦、硫酸渣炼铁消除炉瘤,达到炉况顺行的体会。天然焦是劣质的白煤,气孔率低,热稳定性差,受热后易炸裂,燃烧慢,煤矸石多, Our factory 20m ~ 3 ironmaking blast furnace is transformed into ironmaking blast furnace, put into production in 1981, with an annual output of 8,000 tons, all cast iron. Raw materials have been using natural coke, sulfuric acid residue. Due to the initial use of its performance does not understand, resulting in furnace condition is not smooth, rapid formation of furnace tumor, severe blast furnace twice a month to blast, a serious impact on iron production. After several years of continuous practice, finally mastered the basic characteristics of natural coke and sulfuric acid slag ironmaking, and achieved good results. Here to talk about using natural coke, sulfuric acid slag iron furnace to eliminate furnace, furnace conditions to go straight to experience. Natural coke is poor quality white coal, low porosity, poor thermal stability, easy to burst after heating, slow combustion, coal gangue and more,