Roasted sample

Flow Gas Used

Composition

(wt%)

Volatilization

(wt%)

Cu

Fe

S

As

Sb

As

Sb

FS dust

Nitrogen

31.0

12.0

3.7

3.9

0.3

25.4

70.0

FS dust

Air

24.1

12.9

7.7

5.1

N/A

2.5

N/A

Sulfur/FS dust

5/95 (wt%/wt%)

Air

N/A

N/A

N/A

4.7

0.2

10.1

80.0

Fe₇S₈/FS dust

10/95 (wt%/wt%)

Air

N/A

N/A

N/A

2.7

0.1

48.4

90.0