Treatment method of oolitic hematite containing phosphorus
2012
The invention discloses a treatment method of oolitic hematite containing phosphorus and is characterized in that the treatment method sequentially comprising the steps of: (1) evenly mixing raw ore of oolitic hematite, an annexing agent and coal in proportion and then crushing; (2) conducting metallization reducing roasting on crushed ore in the step (1); (3) slowly cooling high temperature roasted products to 400-750 DEG C, then quickly cooling through water quenching, and conducting water quenching roasted product ball milling; (4) conducting magnetic selection after the ball milling to obtain iron powder and tailings; and (5) melting the iron powder obtained in the step (4) to obtain high-quality molten iron with phosphorus less than 0.01%. The raw ore in the treatment method does no need fine grinding, and thickness of the raw ore can be directly crushed to be -5mm, and the raw ore does no need pelletizing, only needs even mixing with the annexing agent and the coal, greatly saves ore grinding and pelletizing cost, special-grade high-quality molten iron with the phosphorus less than 0.01% is produced by melting, the molten iron can serve as a raw material for producing high-quality steel, and a product production value is high.
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