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Establishment method of blast-furnace injected pulverized coal cost performance evaluation model

A blast furnace coal injection and evaluation model technology, applied in blast furnaces, blast furnace details, furnace types, etc., can solve the problems of large subjective influence, large amount of data, low theoretical level, etc., and achieve the effect of optimal selection

Active Publication Date: 2014-07-30
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

This method is not very theoretical, has a large subjective influence, and the conclusion is not convincing.
In recent years, some scholars have established various fuzzy mathematical models for the optimal selection of blast furnace coal types, which are quite scientific, but the setting of weights is still debatable
And it requires a large amount of data, which is not suitable for the use of corporate procurement departments

Method used

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  • Establishment method of blast-furnace injected pulverized coal cost performance evaluation model
  • Establishment method of blast-furnace injected pulverized coal cost performance evaluation model
  • Establishment method of blast-furnace injected pulverized coal cost performance evaluation model

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[0036] specific implementation plan

[0037] The above content of the present invention will be further described in detail below in conjunction with the specific implementation manner of specific implementation examples:

[0038] First, establish a cost-effective evaluation model for blast furnace injection coal:

[0039] (1) The cost performance evaluation model of pulverized coal is mainly based on the actual supply heat of pulverized coal (Q e ) and injection cost (P e ) on the two indicators; among them, the pulverized coal actually supplies heat (Q e ) includes 8 sub-indices, namely ash content and composition (A), air-dry basis water content (M ar ), sulfur content (S), relative combustion rate (R c,i ), carbon content (C ar ), oxygen content (O ar ), hydrogen content (H ar ), low calorific value (Q net.ar ); Injection cost (P e ) includes 4 indicators, that is, the incoming coal price (P i ), fluidity (LI), grindability (HGI), external water content (M f ); ...

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Abstract

The invention discloses an establishment method of a blast-furnace injected pulverized coal cost performance evaluation model, belonging to the technical field of blast furnace ironmaking, and solving the optimization and selection problems of blast-furnace injected pulverized coal. The model can be used for evaluating the cost performance of blast-furnace alternative fuels such as semi coke, carbocoal, biomass char, waste plastic and tires. A conception that pulverized coal can provide effective utilization caloric value for a blast furnace is proposed based on the combustion reaction behavior of pulverized coal in the blast furnace. Eight indexes influencing the real heat supply of coal powder and four indexes influencing the injection cost can be determined, and a blast-furnace injected coal / alternative fuel cost performance evaluation model can be established. The model is convenient to calculate, and has important guidance significance to the optimization and selection of the on-site blast-furnace injected coal. In addition, the model also can be used for changing corresponding indexes and evaluating other types of alternative fuels.

Description

technical field [0001] The invention relates to a method for evaluating cost performance of blast furnace injection coal, and belongs to the technical field of blast furnace ironmaking. technical background [0002] At present, the iron and steel industry has entered the era of meager profits, and the cost competition among enterprises is becoming more and more fierce. Blast furnace coal injection is one of the important measures for modern blast furnace smelting to greatly reduce production costs and improve economic benefits. Many researchers are mainly committed to the research of coal coke replacement ratio, air temperature, oxygen enrichment, catalytic combustion and other aspects to improve the utilization rate of blast furnace pulverized coal. However, there are few studies on the cost performance and economics of pulverized coal injection in coal blast furnaces. [0003] Most researchers use qualitative methods to directly compare the properties of pulverized coal,...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 左海滨徐润生张建良高冰国宏伟
Owner UNIV OF SCI & TECH BEIJING
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