Abstract
The PURPOSE of this work is additional recovery of nickel from aged and newly formed nickel dump slag by a thermodiffusion method. METHODS. The study employs the method of thermodiffusion comprising the transformation of nickel in slag in the halide compound with the following deposition on a steel substrate (iron shots) formed in slag under the recovery of iron contained in it. RESULTS AND THEIR DISCUSSION. An iron-nickel alloy containing 6.0-9.2% nickel weight has been obtained as a result of chemical and heat treatment of dump nickel slag with the following magnetic separation and smelting of the magnetic concentrate. CONCLUSIONS. The proposed method of additional recovery of nickel and cobalt from dump slags of nickel production allows to extract up to 80-85% of dump nickel and nearly 100% of dump cobalt into the end metal product - ferronickel using inexpensive reagents (undersized coke and ammonium chloride) and equipment.
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