摘要
为研究金川铜镍矿山酸性废水溶解尾矿砂实现综合治理废液与废固的可能性,进行了尾矿砂在硫酸中的溶解实验。结果表明,尾矿砂在硫酸浓度大于3mol/L、温度保持90℃以上并在液固比6.0下强力搅拌,能够较好地溶解于硫酸中,生成无定形二氧化硅;300℃的马弗炉焙烧4h有助于尾矿砂中绿泥石的溶解,对透闪石的溶解影响不大。尾矿砂中橄榄石、蛇纹石和透辉石较容易被硫酸溶解,透闪石、斜长石则比较难溶解,这与尾矿砂中矿物性质有密切关系。
In order to study the possibilities of applying tailings dissolved in acid mine drainage in the Jinchuan copper and nickel mine to the integrated treatment of mine tailings and acid mine drainage, the authors performed the dissolution experiments in sulfuric acid. It is found that tailings dissolve quickly under the following constant parameters： higher than 3 mol/L sulfuric acid concentration, above 90℃ temperature, a appropriate liquid/solid, and strong agitation. The dissolution can produce amorphous silicon dioxide. The pre-roasting of samples in a laboratory Muffle furnace at 300℃ for 4 hours would be of benefit to the dissolution of chlorite, but not beneficial to the dissolution of tremolite. Olivine, serpentine and diopside can dissolve easily while the dissolution of tremolite and plagioclase is rather difficult. Such phenomena are related to the properties of the tailing minerals.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2005年第6期633-637,共5页
Acta Petrologica et Mineralogica
关键词
金川铜镍矿山
尾矿
硫酸
酸溶性
酸性废水
Jinchuan copper and nickel mine
mine tailings
sulfuric acid
dissolution
acid mine drainage
