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| INDUSTRIAL-SCALE UNDERGROUND LEACHING TEST FOR LOW-GRADE HARD-TO-MINING AND REFRACTORY COPPER ORES |
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| DOI： |
| KeyWord:Low grade hard to mining and refractory copper ore,Copper recovery,Underground leaching,Extraction electrodeposition |
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| Abstract: |
| Based on the refractory property of low grade copper ores in Tongkuangyu Mine,some studies have been done in aspects of leaching chemistry, leaching kinetics,computer simulation of infiltration flow,optimization of injecting solution parameters, design of solution collecting engineering,in situ blasting technology,underground grouting for preventing leakage,mine environment monitoring,control of whole flow sheet cost and so on. Through industrial scale test,a significant breakthrough has been made in the industrial scale production of underground solution leaching. A complete set of underground leaching technology has been formed with the features of"screen injection solution, static infiltration, grouting and sealing floor,overall collecting solution". Production practice over one year has shown that the metallurgical performances are stable, leaching operation is normal and extraction recovery is 99.5%. The quality of cathode copper has reached the nation standard of GB/T466 1997. The overall cost of copper is less than 9000 Yuan/t. The direct economic benefic of 9.1 million Yuan has been obtained in one year. |
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