Recovery of Iron from Gold-cyanide Residue by Reduction Roasting and Magnetic Separation

With lignite as the reductant,a method of reduction roasting and magnetic separation was introduced to recover iron from gold-cyanide residue.The impact of lignite dosage,roasting temperature,roasting time,magnetic field strength and other relevant parameters on the iron grade and recovery of the concentrate was investigated.Results show that,an iron concentrate with a TFe grade of 59% and an iron recovery of 80% was obtained under the condition of lignite dosage of 18%,roasting temperature of 800 ℃,roasting time of 50 min and magnetic field strength of 0.24 T.