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Centrifugal extraction machine extraction low-grade nickel laterite ore chloride extraction process

by:Deyuan      2020-09-02
Centrifugal extraction machine extraction low-grade nickel laterite ore chloride extraction process
chloride extraction is to point to add a certain amount of carbonaceous reductant in ore ( Coal or coke, etc. ) And chlorinating agent ( Sodium chloride, calcium chloride, potassium chloride, etc. ) In the weaker or neutral reduction atmosphere heat treatment, form of valuable metal chloride volatilization, chloride and the reducing agent at the same time the process of reduction of the surface of metal elemental Yin. Chloride segregation is different from simple chloride process, also is not simple reduction reaction, but a combination of both. Chlorinated segregation of subsequent processing technology includes both magnetic and ammonia leaching. Chloride segregation metal particles generated a magnetic separation is the segregation chloride enrichment in mineral processing way, produce high grade metal ore concentrate; Chloride and ammonia leaching of segregation is the segregation chloride generated under the condition of metal particles in oxygen using ammonia leaching solution, and recovery of valuable metals from leach liquor.
jin-hui li and others using chlorinated segregation a magnetic separation process including yuanjiang nickel laterite ore in yunnan province in China. Using sodium chloride and magnesium chloride as the chlorinating agent, bituminous coal as the reducing agent, the temperature of 1000 ℃, time of gradation segregation on 90 min, under the condition of weak magnetic field combined with magnetic separation for nickel concentrate, the grade of nickel is 5. 79%} Nickel recovery was 87. Drill the recovery was 69 69%. 02%. Cheng-yan wang using chloride and ammonia leaching process of segregation including yuanjiang nickel laterite ore in yunnan province in China. Using sodium chloride as the chlorinating agent, at the end of the coke as the reducing agent, the temperature is 900 ℃, time of gradation segregation on 180 min under the conditions of access to calcine; Calcine after water using ammonia leaching solution, nickel leaching rate was 81. 54% drill leaching rate was 55. 63%.


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