Temp., ˚C

Leaching Efficiency, %

Al^*

Mn

Zn

Cu

Fe

25

8.5

64.0

47.2

41.9

3.6

50

11.2

77.4

71.2

72.8

8.2

75

23.5

89.7

86.5

90.1

10.9

90

36.7

98.2

94.1

92.1

14.7

100

52.8

98.5

92.5

93.2

18.0