Method for treating iron-containing red mud through coal-based shaft furnace technology
A red mud and shaft furnace technology, applied in the environmental protection field of comprehensive utilization of red mud resources, can solve the problems of increased difficulty in blast furnace smelting operations, bottlenecks in large-scale production, low metallization rate, etc., and achieve advanced and reliable production technology and high product quality The effect of stability and high ball strength
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[0029] Example 1: A method for treating iron-containing red mud with a coal-based shaft furnace process, the steps of which are:
[0030] (1) Iron-bearing red mud ore is ground, separated by high gradient magnetic separation, and dried to obtain tailings and red mud iron concentrate; the water content of the red mud iron concentrate is ≤8% and the particle size is less than 100 mesh.
[0031] The typical composition of red mud iron concentrate after beneficiation is as follows (mass content %):
[0032] TFe
[0033] (2) The red mud iron fine powder is mixed with a binder that accounts for 1 to 5% by weight of the iron fine powder (the binder is a mixture of lignocellulose and syrup, lignocellulose: syrup = 0.5:0.5), Add 2% to 5% of water, press the ball after mixing, the diameter of the green ball is 12 to 35mm, and the water content is less than 12%;
[0034] (3) After drying, the green ball has a moisture content of less than 5%, and limestone with a particle size of less than 5m...
Example Embodiment
[0045] Example 2: A method for treating iron-containing red mud by a coal-based shaft furnace process, the steps of which are:
[0046] (1) Iron-bearing red mud ore is ground, separated by high gradient magnetic separation, and dried to obtain tailings and red mud iron concentrate; the water content of the red mud iron concentrate is ≤8% and the particle size is less than 100 mesh.
[0047] The typical composition of red mud iron concentrate after beneficiation is as follows (mass content %):
[0048] TFe
[0049] (2) The red mud iron fine powder is mixed with a binder that accounts for 1 to 5% by weight of the iron fine powder (the binder is a mixture of lignocellulose and syrup, lignocellulose: syrup = 0.5:0.5), Add 2% to 5% of water, press the ball after mixing, the diameter of the green ball is 12 to 35mm, and the water content is less than 12%;
[0050] (3) The green ball after drying treatment has a water content of less than 5%, and limestone with a particle size of less tha...
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