Table 1 Different methods of converting jarosite into hematite.

From: Controllable mechanism of hazardous jarosite transformation into recyclable hematite in the leaching solution of secondary zinc oxide powder

Raw materials

Methods

Reaction conditions

References

Temperature (°C)

Time (min)

Na-jarosite

Hydrometallurgy

225

120

33

Na-jarosite/K-jarosite

Hydrometallurgy

225/240

120

34

Na-jarosite

Hydrometallurgy/pyrometallurgy

90/400

15/180

35

Pb-jarosite

Hydrometallurgy

200

240

36

Na-jarosite

Hydrometallurgy

220

120

37

Pb-jarosite

Pyrometallurgy

700/1400

60/80

38

Leaching solution

Hydrometallurgy

185

180

This study

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