Method for preparing blast furnace blow-in coal
A blast furnace injection coal and blast furnace technology, applied in the blast furnace, blast furnace details, blast furnace parts, etc., can solve the problems of reduced addition amount, failure to increase the melting point of coal powder ash, and large amount of slagging agent addition, so as to suppress the calorific value the reduced effect of
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no. 1 approach
[0030] in accordance with figure 1 and figure 2 , to describe the first embodiment of the method for producing blast furnace injection coal of the present invention.
[0031] The blast furnace pulverized coal of the present embodiment is blast furnace pulverized coal injected from the tuyere into the blast furnace main body of the blast furnace equipment, and can be easily produced by the following method, that is, figure 1 As shown, by analyzing the moisture content of the raw coal and the ash content of the coal, and analyzing the wt% of Al, Si, Ca, and Mg in the ash content of the coal (the first process S1), the first coal type that satisfies the condition A is selected. (second process S2), and select the second coal type that satisfies the low ash melting point of condition B different from condition A (third process S3), and derive that these coals (the first coal type and the second coal type) are mixed The ash melting point (the fourth process S4) of the mixed coal...
no. 2 approach
[0046] in accordance with figure 1 and Figure 3 ~ Figure 5 , which describes the second embodiment of the method for producing blast furnace injection coal of the present invention.
[0047] The steps in this embodiment have been changed figure 1 The fifth step S5 included in the first embodiment shown above. other processes and figure 1 The contents shown above are substantially the same, and therefore redundant descriptions are appropriately omitted.
[0048] In this embodiment, in the fifth step S5 of selecting additives to be added to the coal blend, the ash melting point of the blended coal derived in the fourth step S4 performed before the fifth step S5 is determined first. exist image 3 As shown, Al, Si, Ca, and Mg oxides in coal ash are set to 100 wt%, and Al 2 o 3 SiO when the content is converted to 20 wt% 2 -CaO-MgO-20%Al 2 o 3 Where is it in the quaternion state diagram of . That is to say, it is determined that the ash melting point of the blended coa...
Embodiment
[0061] Hereinafter, examples carried out to confirm the effects of the production method of blast furnace injection coal according to the present invention will be described, but the present invention is not limited to the following examples explained based on various data.
[0062] First, if figure 1 As shown, the moisture content and the ash content of the coal when analyzing the raw coal of the coal, and the wt% of Al, Si, Ca, and Mg in the ash content of the coal are analyzed in advance (the first process S1), and the first one that satisfies the above condition A is selected. coal type (second process S2), and a second coal type satisfying the condition B different from the condition A is selected (third process S3). In this embodiment, the coal type 1 shown in the following table 1 is selected as the first coal type satisfying the condition A, and the coal type 2 shown in the following table 1 is selected as the first coal type satisfying the condition B. Describe the s...
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Abstract
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