Method for reducing emission of nitrogen oxides in iron ore sintering process
A technology of sintering process and nitrogen oxides, which is applied in chemical instruments and methods, separation methods, solid fuels, etc., can solve the problems of low nitrogen oxide emission reduction efficiency, reduce nitrogen oxide emissions, etc., and increase the reaction interface , promote combustion, and promote the effect of effective reduction
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Embodiment 1
[0033] Such as figure 1 Shown, a kind of iron ore sintering process nitrogen oxide emission reduction method of the present invention, the steps are:
[0034] (1) Fuel modification treatment
[0035] Add quicklime to the fuel for dry mixing without adding water to prepare modified fuel; the specific steps are: under dry conditions, first add the fuel to the mixer, and then add quicklime to the fuel , dry-mix quicklime and fuel, avoid adding water during the mixing process, wherein the quality of quicklime is 0.25% of the total mass of fuel, and the proportion of quicklime with a particle size of less than 200 meshes is not less than 80%. This embodiment The fuel is coke powder; here, it is worth noting that the mixer needs to be dried if it is wet.
[0036] (2) Preparation of sintered material
[0037] The iron-containing raw materials, flux and modified fuel are mixed and granulated to obtain a mixture; the iron-containing raw materials may include iron ore powder, returne...
Embodiment 2
[0043]The basic content of this embodiment is the same as that of Example 1, except that the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in step (1) is: 1 to 1.86, the particle size of the fuel in this embodiment The composition is shown in Table 2, wherein the mass ratio of the fuel with particle size less than 1.0 mm to the fuel with particle size greater than 1.0 mm in this embodiment is 1.
[0044] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 5.
[0045] The particle size composition of the fuel of table 2 embodiment 2
[0046]
Embodiment 3
[0048] The basic content of this embodiment is the same as that of Example 1, except that the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in step (1) is: 1 to 1.86, the particle size of the fuel in this embodiment The composition is shown in Table 3, wherein the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in this embodiment is 1.5.
[0049] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 5.
[0050] The particle size composition of the fuel of table 3 embodiment 3
[0051]
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