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| Combined Process to Recover Iron and Zinc from Jarosite Residue by Coal-based Direct Reduction in Rotary Hearth Furnace |
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Received:December 21, 2015
Revised:December 24, 2015
Accepted:December 28, 2015
Published Online:March 21, 2016
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| DOI：10.3969/j.issn.1007-7545.2016.04.002 |
| KeyWord:rotary hearth furnace (RHF); jarosite residue; reduction; iron; zinc; pilot test |
| Author | Institution |
| caoxiaoen |
钢铁研究总院 |
| HONG Lu-kuo |
钢铁研究总院 |
| QI Yuan-hong |
钢铁研究总院 |
| ZHOU He-min |
钢铁研究总院 |
| GUO Yu-hua |
钢铁研究总院 |
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| Abstract: |
| Direct reduction-melting combined process in rotary hearth furnace (RHF) address carbon-containing pellets of jarosite residue was developed to recover iron and zinc. The effects of parameters on recovery of iron and zinc were investigated. Under the optimum conditions including basicity of R=2.5, C/O=1.4, temperature of 1 300 ℃, time of 30 min, metallization rate is 98.47%, iron recovery rate is 95%, zinc volatilizing rates is 94% at reduction stage and almost 100% in the end of melting. Pilot plant test was carried out to produce metallized pellets under the optimum conditions. Total iron content in metallized pellets is 44.50% with metallic iron of 34.71% and metallization rate of 78%, and zinc volatilizing rates is 92% in RHF (Φ=3.0 m) pilot plant test under the above mentioned optimum conditions. |
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