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1·The results of orthogonal experiment in sulphating roasting process showed that sulfuric acid consumption affected the leaching rate significantly, then temperature and time.

通过对酸化焙烧进行正交实验发现：硫酸用量为最重要影响因素，温度和时间次之。

(1)ammonium sulphate硫酸铵；硫酸氨

(1)calcium sulphate[化]硫酸钙

(1)potassium sulphate硫酸钾

(1)sodium sulphate硫酸钠；元明粉；芒硝

(1)copper sulphaten. 硫酸铜

(1)ferrous sulphate硫酸亚铁；硫酸铁