An evaluation method for calculating the cost performance of semi coke based on the effective calorific value of coal powder

By calculating the effective calorific value and cost-effectiveness index of pulverized coal in the blast furnace, the problem that traditional evaluation methods failed to reflect the actual energy contribution of semi-coke was solved. This enabled accurate and economical evaluation of fuel selection during blast furnace ironmaking, optimized fuel ratios, and improved blast furnace ironmaking efficiency.

CN122364589APending Publication Date: 2026-07-10抚顺新钢铁有限责任公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
抚顺新钢铁有限责任公司
Filing Date
2026-03-18
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional methods for evaluating the cost-effectiveness of semi-coke fail to comprehensively consider the complex physicochemical processes of pulverized coal in the blast furnace, resulting in evaluation results that cannot truly reflect its actual energy contribution in the blast furnace and make it difficult to maximize the economic benefits of fuel selection.

Method used

By calculating the effective calorific value of pulverized coal in the blast furnace, including the heat of incomplete combustion of carbon, the heat of water decomposition, the heat of hydrocarbon decomposition, the heat of ash slagging, and the heat of desulfurization, an evaluation method of cost-effectiveness index K = effective calorific value / injection cost is established. Combined with fuel composition and price data, the energy contribution and cost of pulverized coal in the blast furnace are accurately quantified.

Benefits of technology

It enables precise quantitative evaluation under blast furnace operating conditions, ensuring the scientific nature and operability of cost-effectiveness evaluation, providing a unified decision-making dimension for fuel selection, optimizing fuel ratio structure, and improving the efficiency and economy of blast furnace ironmaking.

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Abstract

This invention provides a method for evaluating the cost-effectiveness of semi-coke based on the effective calorific value of pulverized coal, relating to the field of iron and steel metallurgy. First, a formula for calculating the effective calorific value of pulverized coal in a blast furnace is established. By calculating the heat released from incomplete combustion of carbon and deducting the heat absorbed by moisture decomposition, hydrocarbon cracking, ash slag formation, and desulfurization, an effective calorific value more consistent with the actual operating conditions of the blast furnace is obtained. Subsequently, this effective calorific value is divided by the injection cost to construct a cost-effectiveness index. By calculating and comparing the cost-effectiveness index of the target fuel combination after semi-coke partially replaces anthracite with the benchmark combination cost-effectiveness index, the economic viability of semi-coke substitution can be accurately determined, and the critical price or price range for cost-effective semi-coke can be directly calculated. This invention overcomes the shortcomings of traditional evaluation methods that are detached from the actual thermal environment of the blast furnace, providing a scientific and quantitative decision-making basis for fuel procurement and coal blending optimization.
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