Run

[Oxalic: Hydrochloric] acid ratio

Acid concentration (%)

Liquid/Solid (g/L)

Temperature (˚C)

Time (h)

Fe dissolution (%)

Ti dissolution (%)

1

2

30

10

70

2

82

17

2

1

20

7.5

115

3

61

7.6

3

0

10

10

160

4

44

4.5

4

1

20

7.5

160

3

71

11.5

5

2

10

10

160

2

81

12

6

2

30

5

70

4

90

8.2

7

0

10

5

70

4

24

2.1

8

1

20

7.5

115

3

60

5.5

9

1

20

7.5

115

3

61

5.3

10

2

10

10

70

4

78

11.1

11

0

10

10

70

2

28

3

12

1

20

7.5

70

3

55

4.9

13

0

30

5

160

4

42

14.5

14

1

20

7.5

115

3

65

11.3

15

0

30

5

70

2

26

11.3

16

2

10

5

70

2

65

8.2

17

0

20

7.5

115

3

47

9.4

18

2

30

5

160

2

77

16

19

0

30

10

70

4

40

19

20

1

20

5

115

3

55

6.7

21

1

20

7.5

115

2

50

7.9

22

2

20

7.5

115

3

77

10.2

23

2

10

5

160

4

72

13.5

24

1

20

7.5

115

4

78

13.7

25

2

30

10

160

4

95

39

26

1

20

7.5

115

3

67

7.8

27

1

10

7.5

115

3

38

6.8