Pyrrhotite excess

pH

Content in solution, g/dm3

Degree of nickel precipitation, %

Content in precipitate, %

CNi:CFe ratio in the precipitate

Ni

Fe

Ni

Fe

0.9

1.15

0.15

6.6

98.35

52.0

9.1

5.7

1.0

1.2

0.1

7.4

98.9

58.0

9.1

6.4

1.04

1.2

0.12

7.4

98.7

50.5

9.17

5.6

1.1

1.3

0.05

7.6

99.3

55.5

11.7

5.0

1.13

1.45

0.07

7.3

99.1

52.5

11.8

4.4

1.17

1.8

0.03

8.2

99.6

51.5

13.1

3.9