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Prediction method of thermal reactivity of coke

A technology of thermal reactivity and prediction method, which is applied in the direction of fuel oil testing, material inspection products, etc., can solve the problems of heavy test workload and long cycle, and achieve the effect of high degree of fit, few factors, and low requirements for physical conditions

Active Publication Date: 2017-01-25
武汉钢铁有限公司
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Problems solved by technology

[0008] 3) There are still a considerable number of coking enterprises through the small coke oven coal blending coking test, adjusting the coal blending ratio, investigating the thermal reactivity of the test coke, and obtaining a suitable coal blending ratio. The disadvantage is that the test workload is large and the cycle is long

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  • Prediction method of thermal reactivity of coke
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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with specific embodiments.

[0019] Method of the present invention comprises the steps:

[0020] 1) Determine the components of each single coal ash used in coking, and calculate the mixed coal alkalinity index MCI;

[0021] 2) Measure the coke-forming optical structure of each single coal used for coking, and calculate the sum M of the coarse-grain mosaic, medium-grain mosaic, incomplete fiber, fiber and sheet-like components in the blended coal;

[0022] 3) Set CRI=A+B*MCI+C*M, where CRI is coke thermal reactivity, unit is %, A, B, C are constants, by substituting three groups of coal blending coking tests or actual production data into the Calculated by the formula;

[0023] 4) Calculate the predicted value of coke thermal reactivity CRI according to the formula in step 3).

[0024] If the calculated coke thermal reactivity prediction value CRI 预测 If it cannot meet the needs of blast ...

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Abstract

The invention discloses a predication method for the heat reactivity of cokes. The predication method comprises the following steps: (1) determining each single coal ash component for coking and calculating to obtain a matched coal basicity index MCI; (2) determining each single coal coking optical tissue structure for coking and calculating to obtain the sum M of the content of coarse-grain embedded component, middle-particle embedded component, incomplete fiber, fiber and sheet-shaped components in coal; (3) setting CRI=A+B*MCI+C*M, wherein the CRI is the heat reactivity of the cokes and the unit is percent, and A, B and C are constant numbers; and (4) calculating to obtain a predicated value of the heat reactivity of the cokes CRI. According to the predication method, the heat reactivity of the cokes can be predicated relatively well under the condition that a matched coal coking test is not carried out through relatively few influence factors and a simple predication formula, and the predication precision is within + / -1%. According a predication result, a coal matching scheme can be adjusted so that the matched coal coking practice can be guided very well.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a method for predicting coke thermal reactivity. Background technique [0002] The coke in the blast furnace burns violently in the swirl area in front of the tuyere. The heat energy generated by the combustion is the main heat source in the blast furnace smelting process, and the CO generated after the combustion reaction is the main reducing agent in the blast furnace smelting process. In the blast furnace ironmaking process, the reactivity of coke affects the combustion rate of coke in the tuyere area, the CO 2 The reaction rate of coke in the tuyere boundary layer, the temperature level of the blast furnace heat reserve area and the reduction rate of iron ore, etc., the reactivity index of coke has attracted more and more attention from the ironmaking industry. [0003] The test method of coke reactivity was first proposed by Japan. The main points ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
Inventor 鲍俊芳陈细涛薛改凤盛军波常红兵陈胜春崔会明陈鹏项茹张雪红宋子逵詹立志冯柏华谢传斌任玉明王元生万基才
Owner 武汉钢铁有限公司
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