METHOD FOR PREVENTING MEMBER COMING INTO CONTACT WITH SULFURIC ACID SOLUTION AND SULFURIC ACID MIST FROM BECOMING ERODED

摘要

PROBLEM TO BE SOLVED: To significantly prolong the life of a member which comes into contact with a sulfuric acid solution or sulfuric acid mist or both of these chemical substances by using a carbon ceramic for the member coming into contact with the sulfuric acid solution and/or sulfuric acid mist when preventing the member from becoming eroded. SOLUTION: In the melting step or the electrolytic refining step of a raw material such as ores or the like, of the smelting process of non-ferrous materials such as copper or the like, a sulfuric acid solution is used as a melting liquid or an electrolyte. To prevent a member coming into contact with the sulfuric acid solution whose sulfuric acid concentration and liquid temperature and high or sulfuric acid mist whose temperature is high from becoming eroded or worn out, carbon ceramic is used for the member coming into contact with sulfuric acid solution and/or the sulfuric acid mist. The carbon ceramic to be used is preferably carbon ceramic comprising the C-ceramic dispersed in a graphite matrix. Further, the C-ceramic is preferably one or more kinds selected from SiC, B4 C, TiC, Mo2 C or the like.