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| New Process of Atmospheric Pressure Strengthening Leaching for Nickel Laterite Ore with Vitriol |
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Received:July 17, 2013
Revised:July 17, 2013
Accepted:July 22, 2013
Published Online:December 23, 2013
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| DOI：10.3969/j.issn.1007-7545.2014.01.006 |
| KeyWord:nickel laterite ore; vitriol atmospheric pressure strengthening leaching; thermal decomposition; active magnesium oxide |
| Author | Institution |
| wuyaoming |
广西冶金研究院 |
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| Abstract: |
| Nickel laterite ore was strengthening leached with vitriol at atmospheric pressure. Nickel leaching rate rose to 95% above without waste acid treatment. Iron slag was produced from lixivium after iron and aluminum removal. Pure magnesium sulfate solution was produced from precipitation of nickel and manganese at a relatively high pH value. Magnesium sulfate anhydrous was prepared from magnesium sulfate solution by concentration, crystallization, and dehydration. Sulfur dioxide and active magnesium oxide were prepared by atmospheric pressure thermal decomposition of magnesium sulfate anhydrous in vacuum rotary kiln at 800 ℃ with sulphur as reductant. Sulphur was first used to make acid and then to leach nickel laterite ore. Active magnesium oxide was to remove iron and aluminum, precipitate nickel and manganese, or to be for sale. |
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