Reduction-fusion iron manufacturing process for coal-bearing pellets
A technology of coal pellets and coal pellets, which is applied in the field of coal-containing pellet reduction-smelting ironmaking, can solve the problems of reduction furnace bonding, downcomer blockage, fuel ratio and coke height, reduce bonding and pipe blockage, and improve energy utilization rate, to avoid the effect of high temperature expansion
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[0018] This embodiment includes the following process steps:
[0019] 1. Making the ball
[0020] The iron ore powder, coal powder and binder are mixed in a certain proportion, and iron-containing briquettes are pressed by a ball press. The binder is cement, slaked lime, quicklime, water glass or organic binder, and the reducing agent is coal powder. Or coke powder, the ratio of each raw material is iron ore powder 50% to 90%, binder 3% to 30%, and reducing agent 5% to 47%. The process is now mature, with low failure rate and suitable for large-scale production. Compared with the ordinary production process of pellets, there is no need to build a huge shaft furnace, and the pellets are reliable, and it is convenient to add the reducing agent (coal powder) into the pellets as needed.
[0021] 2. The coal-containing pellets are dried and reduced by a belt-type baking reduction machine
[0022] The produced iron-containing briquettes pass through the belt and directly enter the belt ...
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