我矿井下水酸度很大,pH值为2～3,水中硫酸根离子含量据测定为2500～2900(毫克/升),井下空气中也由于含有二氧化硫气体而形成酸雾。因此井下管道腐蚀极为严重,压风管、供水管,一般在两年内即漏风漏水,甚至全部穿孔烂掉无法使用。尤其是排水管,内外都受腐蚀,一般不到一年时间管壁就烂了。特别是弯头处,只用一个多月,甚至1～2周即穿孔。一个年产量6万吨的小矿,一年钢管的消耗量约在2万吨左右。 I mine great acidity, pH value of 2 to 3, the water sulfate ion content was measured as 2500 ~ 2900 (mg / L), downhole air also contains sulfur dioxide gas and the formation of acid mist. Therefore, underground pipe corrosion is extremely serious, air duct, water supply pipe, air leakage usually within two years, or even perforated all rotting can not be used. Especially the drainage pipe, inside and outside are subject to corrosion, the wall is generally less than a year on the rotten. In particular, elbow Department, only more than a month, or even 1 to 2 weeks perforation. An annual output of 60,000 tons of small mines, steel consumption a year about 20,000 tons.