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| New Process of Gold Extraction from Refractory Gold Ore by Short Route Molten Salt |
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Received:September 17, 2015
Revised:September 17, 2015
Accepted:September 22, 2015
Published Online:February 23, 2016
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| DOI：10.3969/j.issn.1007-7545.2016.03.010 |
| KeyWord:refractory gold ore; short process; cyanide-free; molten salt; chloride volatilization |
| Author | Institution |
| GUO Chi-hao |
北京矿冶研究总院 |
| WANG Yun |
北京矿冶研究总院 |
| LIU Da-xue |
北京矿冶研究总院 |
| WEI Qi-jin |
北京矿冶研究总院 |
| LIANG Dong-dong |
北京矿冶研究总院 |
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| Abstract: |
| A test of molten salt chlorination was performed on gold-bearing calcine and effects of volatilization time, melting time, oxygen supply rate, chloride addition and adding mode on gold volatilization rate were investigated. The results show that gold volatilization rate is 97% above under the optimum conditions including CaCl2 addition of 8%, oxygen flowrate of 3 m3/h, melting voltage of ~410 V, melting current of ~40 A, melting temperature of 1 200 ℃, and holding current after melting of ~20 A. A new short route cyanide-free gold extraction process is proposed. |
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