Method for manufacturing hematite for ironmaking

摘要

The purpose of the present invention is to provide a manufacturing method for producing hematite for ironmaking from leachate, the method suggesting a separation method for leachate from which hematite-containing matter that can be used as a raw material in ironmaking can be obtained. This method for manufacturing hematite for ironmaking involves the use of, as a raw material, leachate in a slurry state obtained from a hydrometallurgy plant for extracting nickel oxide ore using high-pressure acid leaching, and is characterized in that at least steps 1-3 are performed in sequence, the steps comprising: a first step in which the leachate in a slurry state is separated into overflow and underflow using a wet cyclone; a second step in which the overflow is separated into strongly magnetic constituents and weakly magnetic constituents using a high-field magnetic separation device that uses a magnetic force; and a third step in which a sintered compact is formed by sintering the separated strongly magnetic constituents at a temperature in the range of 1150-1350°C.