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With high-grade nickel sulphide ore mining depletion, the use of low-grade nickel laterite growing concern . Nickel laterite nickel ore has low mineral composition is complex, serious weathering characteristics , determine the nickel laterite processing technology is complicated and costly , so far has not been rational development and utilization . In this thesis, an area of domestic laterite nickel ore as raw material , the use of chlorinated segregation - magnetic separation process enrichment of nickel and cobalt laterite ores , and this process is handled by other types of laterite nickel ore . By chlorination segregation - magnetic separation process as well as the basic principles of minerals of nickel, cobalt and iron chloride segregation thermodynamic analysis can be drawn , in a neutral or weakly reducing atmosphere conditions, ore nickel, cobalt and iron and other metals oxides can be released hydrogen chloride, chlorinated agents generate the corresponding chlorides , chloride vapor and carbon particles whose surface is isolated to obtain elemental metal or alloy , and chlorinating agent to be regenerated , after segregation calcine magnetically elect to obtain nickel-cobalt enriched concentrate. A domestic low-grade nickel laterite chloride segregation - magnetic experimental results show that : ore particle size of 0.12 ~ 0.15mm, calcium chloride is calculated as the amount of ore by 8% , reducing particle size of 0.18 ~ 0.25mm, the amount of ore material ratio of 6% , after 1000 ℃, 90min segregation chloride reaction , the resulting calcine grinding to 0.038 ~ 0.048mm, and then sweep the election 3000Gs 1000Gs selection of conditions, you can get magnetic Nickel concentrate products , nickel grade of 6.47% for the index , nickel recovery 86.75% , grade of 0.224% cobalt , cobalt recovery 65.37% . A foreign three different mining nickel laterite ore bed chlorination segregation - magnetic separation results showed that: nickel laterite ore bed segregation in the chlorination process is not consistent amount of reagent consumption , but can make nickel in concentrate enrichment of more than 8 times , 6 times more enriched in cobalt and limonite type laterite nickel can yield more than 90% , the yield of close to 70% cobalt . The research results show that : the use of chlorinated segregation - magnetic separation process can be selective enrichment of nickel and cobalt and lower silicon, magnesium content , significantly reducing the amount of drug use and the amount of processing subsequent purification process , which is China's abundant reserves nickel laterite resources and global reach other laterite nickel ore zone development and utilization of great significance.
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