Selection method suitable for blast furnace blowing and coal blending scheme
A technology of coal injection and coal blending, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of low coal blending costs, and achieve the effects of reducing coal blending costs, maximizing energy utilization, and saving production costs
Active Publication Date: 2013-07-24
SHOUGANG CORPORATION
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Problems solved by technology
However, there is still no method to optimize the selection of coal blending scheme for blast furnace injection, so that the selected coal blending plan can not only meet the pulverization capacity of blast furnace injection, but also minimize the cost of coal blending
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[0029] The basic PCI coal of a steel plant is coal type B and C, and the new coal type is A. The industrial analysis is shown in Table 1.
[0030] Table 1 shows the chemical composition and calorific value of PCI coal
[0031]
[0032] Based on the calorific value and price of a single type of PCI coal, the calorific value of the benchmark PCI coal blend, the cost of the benchmark PCI coal, the calorific value of the new coal blending structure PCI coal, and the new blending coal calorific value are calculated by weighting methods. The cost of coal structure PCI (new PCI A replaces PCI B with 10% as a basic unit), see Table 2.
[0033] Table 2 Cost and calorific value of coal blended in different proportions A
[0034]
[0035] Then divide the blended coal calorific value of the baseline PCI coal calculated by the weighting method by the blended coal calorific value of the new coal blending structure PCI to obtain the incremental coefficient of the newly blended PCI coa...
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The invention relates to the technical field of blast furnace coal blending, and discloses a selection method suitable for a blast furnace blowing and coal blending scheme. The selection method comprises the following steps of: calculating and obtaining coal blending quantity of blowing coal in a new coal blending structure according to coal blending quantity of reference blowing coal; judging the sizes of the coal blending quantity of blowing coal in the new coal blending structure and powder manufacturing capacity required for blast furnace blowing; if the coal blending quantity of blowing coal in the new coal blending structure is larger than the powder manufacturing capacity, indicating that the new coal blending scheme cannot meet the coal manufacturing capacity of blast furnace blowing, and requiring to reduce the quantity of the blowing coal newly blended till the new coal blending scheme meets the coal manufacturing capacity of blast furnace blowing; if the coal blending quantity of blowing coal in the new coal blending structure is smaller than or equal to the powder manufacturing capacity, indicating that the new coal blending scheme meets the coal manufacturing capacity of blast furnace blowing; and finding out the new coal blending scheme with minimum cost in which the mixed coal heat values of the reference blowing coal are the same in the new coal blending scheme meeting the coal manufacturing capacity of blast furnace blowing. According to the selection method, the coal blending scheme which meets the powder manufacturing capacity and is minimum in coal blending cost can be selected.
Description
technical field [0001] The invention relates to the technical field of blast furnace coal blending, and is mainly applicable to a method for selecting a blast furnace injection coal blending scheme. Background technique [0002] In recent years, with the continuous improvement of the blast furnace operation level, the continuous increase in the demand for blast furnace injection coal, and the continuous rise in the cost of raw materials and fuels, the pressure on steel companies to reduce costs has continued to increase. The consumption of coal for injection is an important factor affecting the cost of injection. However, there are more and more types of PCI coal, and the prices of each type of coal vary greatly due to the influence of factors such as composition, performance, and transportation. Blast furnace injection often has a basic coal blending structure, and on the premise that new coal types are available, there is a coal blending plan to replace the original coal ...
Claims
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IPC IPC(8): C21B5/00
Inventor 竺维春王冬青马泽军刘文运张勇
Owner SHOUGANG CORPORATION