Case 1
A molybdenum dressing plant in Fujian, the main valuable minerals were molybdenite. The process of the plant was once roughing, twice scavenging, four times cleaning, and molybdenum ore grade was 0.38%. In recent years, due to the mining depth increasing, ore properties had changed, so the flotation index became poor leading to more molybdenum metal loss. After field investigation and analysis, Xinhai determined the process according to multi tests: crude one stage grinding, once roughing, once rough cleaning, once rough cleaning concentrate regrinding, three times scavenging, seven times cleaning after regrinding, to achieve abetter index, indexes comparison as follow: <
Comparison of Reformation |
Process |
Molybdenum Concentrate Grade
/% |
Recovery Rate of Molybdenum Concentrate
/% |
Before Reformation |
Once roughing, twice scavenging, four times cleaning |
35.30 |
78.78 |
After Reformation |
Once roughing, once rough cleaning, once rough cleaning concentrate regrinding, three times scavenging and seven times cleaning after regrinding |
45.23 |
73.68 |
By this reformation, new process saves reagents, personal and management cost