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| Experimental Study on Laterite-nickel Ore with Reduction Roasting-Sulfuric Acid Leaching Methods |
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Received:April 01, 2016
Revised:April 06, 2016
Accepted:April 08, 2016
Published Online:December 15, 2016
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| DOI： |
| KeyWord:Laterite-nickel ore; reduction-roasting; sulfuric acid leaching |
| Author | Institution |
| qiusha |
Tian Jin North China Geological Exploration Bureau,Tianjin |
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| Abstract: |
| A mine is a typical limonitic laterite ore, containing 1.04% nickel and 40.55% iron, grade of magnesium and silica is relatively low.Particle size of the ore is very fine, fraction of less than 0.038mm accounted for 66.58%. Nickel mainly embeds in limonite and silicate minerals, distribution rate is respectively 75% and 24.04%. Reduction roasting and sulfuric acid leaching method was adopted to deal with the ore. The results showed that under the condition of content of carbon particle size of -0.074mm 90%, carbon dosage 30wt%, roasting temperature 700℃, roasting time 30min, sulfuric acid dosage 0.5 ml·g-1, leaching temperature 80℃, leaching time 2.0h, liquid and solid ratio 5:1, the leaching rate of Ni, Co, Fe was 74.88%、93.83%、35.87% respectively. |
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