STUDY ON INTENSIFIED LEACHING OF NICKEL IN Mo-Ni SULFIDE ORES
Received:November 24, 2010  
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DOI:10.3969/j.issn.1005-7854.2011.03.016
KeyWord:Ni-Mo sulfide ore; leaching; leaching rate
  
AuthorInstitution
LIU Mei School of Petrochemical Technology, Liaoning Shihua University ,Fushun ,China
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Abstract:
      Separation of nickel and molybdenum in primary sulfide nickel and molybdenum ore is realized by roasting-water leaching, and intensified leaching process study is done to obtained nickel dioxide slag to investigate the influence of process factors such as acid type, portioning, leaching temperature, solid-liquid ratio, content, ultrasonic, additive dosage and etc. on nickel leaching rate. The results of experiments show that the recovery rates of nickel and molybdenum are 96.70% and 99.85 % respectively during the roasting process with the mass ratio of raw ore to sodium carbonate is 1: 0.9, and the time of calcinations is 6 hours with the temperature of 650℃. Under the condition of the solid-to-liquid ratio set 1:4 and the leaching temperature 95℃, after two hours immersion of calcinations slag, 99.70% of nickel is remained in the filter slag, and 95.43% of molybdenum is transferred into the filter liquor. Under the condition of the solid-to-liquid ratio set 1:6, the leaching temperature 95℃, with the 15% sulfuric acid, 0.5g additive and with the help of ultrasonic wave, after 6 hours of leaching, the leaching rate of nickel is 79.80%.
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