Process for the improvement of reducibility of ore pellets

摘要

A process for the improvement of reducibility of iron ore pellets including the steps of preparing a raw material mixture which contains metallic Ni powder, pelletizing the mixture obtained, burning the raw pellets and reducing the burnt pellets under reducing conditions in the presence of CH4.

主权项

1. A process for improvement of reducibility of iron ore pellets, comprising:
preparing a raw material mixture comprising:
iron ore powder;0.4 to 0.7% of bentonite per total mass of the mixture;1.00 to 5.00% of limestone per total mass of the mixture;0.025 to 0.100% of Ni per total mass of the mixture; and0.025 to 0.100% of Fe per total mass of the mixture; pelletizing the raw material mixture in a pelleting disk with addition of water and drying to form raw pellets; burning the raw pellets in a furnace under oxidizing conditions and at a temperature within a range of 1000° C. to 1400° C. to form burnt pellets; and reducing the burnt pellets under reducing conditions with CH4.