论文部分内容阅读
铸铁在高温高浓度硫酸中比较耐蚀,同时铸铁铸造性能良好,价格低廉,所以硫酸工业所用的浓缩锅(蒸煮锅)用铸铁制造.苏联规定硫酸浓缩锅用МСЧ38—60牌号铸铁,其成份为C2.6～3.0%,Si0.8～1.5%,Mn1.1～1.3%,P<0.3%,S<0.12%,Cr0.2～0.5%,Ni0.8%.我国缺乏镍、铬,而硫酸制造工业迫切需要补充新的浓缩锅,我们企图找到适用于上述目的但不含镍铬的铸铁,因此在铸铁对70～95%浓度沸腾硫酸耐蚀性方面进行了研究.
Cast iron in the high temperature and high concentration of sulfuric acid in the more corrosion-resistant, cast iron casting good performance at the same time, the price is low, so the sulfuric acid industry used concentrated pot (cooking pot) made of cast iron.Urganized sulfuric acid concentration pot with МСЧ38-60 grade cast iron, its composition C2.6 ~ 3.0%, Si 0.8 ~ 1.5%, Mn1.1 ~ 1.3%, P <0.3%, S <0.12%, Cr0.2 ~ 0.5%, Ni0.8% .China lacks nickel and chromium, The sulfuric acid manufacturing industry is in urgent need of replenishing new concentrating pots. We tried to find cast iron suitable for the above purposes but not nickel-chromium, so we studied the corrosion resistance of cast iron with boiling sulfuric acid at 70-95% concentration.