Abstract
Pelletizing and reduction tests for direct reduction process using nickel leaching residue were carried out. Green pellet showed sufficient compressive strength and drop resistance for handling without addition of bentonite. The compressive strength of fired pellet was greatly increased when a small amount of limestone was added and the maximum strength was achieved at a CaO/SiO 2 ratio of 0.2. Pellet with a compressive strength of 240 kg/pellet and a porosity of 30% was obtained by means of a pot-grate furnace at a firing temperature of 1220°C. When reduction tests were carried out by using non-coking coal as reductant, the highest degree of reduction (85.8%) was achieved at a reduction temperature of 1100°C.
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