A top-loaded coke blend coal

Abstract

The invention discloses a top-loaded coke blended coal, which comprises the following components in terms of mass percentage: No. 25 high-sulfur coking coal: 19%; No. 25 low-sulfur coking coal: 15%; No. 35 coal I: 16%; No. 35 Coal II: 25%; No. 35 Coal III: 10%; Lean Coal: 8%; The caking index G value of coal III is ≥ 70%, and the caking index G value of No. 35 coal III is ≥ 65%. The present invention controls the distribution ratio of each component of the top-loaded coke, optimizes the composition of each component and the corresponding parameter index, ensures the good thermal strength of the top-loaded coke, reduces the amount of high-priced fat coal and low-sulfur main coking coal, and improves the The proportion of low-priced lean coal and high-sulfur main coking coal optimizes the coal blending structure, effectively reduces the cost of coal blending, stabilizes the quality of coke, and creates good conditions for the stable operation of the blast furnace.

Description

technical field

[0001] The invention relates to the technical field of metallurgy, in particular to a top-loaded coke blended coal. Background technique

[0002] As blast furnaces have higher and higher requirements for coke quality stability, higher requirements have been put forward for the stability of incoming coal quality. How to make full use of coal rock analysis to control incoming coal quality, optimize coal blending structure, and reduce coal blending costs has become an important issue. A major research topic facing the coking industry.

[0003] In order to ensure the quality of blast furnace coke and ensure the melting efficiency, the conventional coal blending structure has high content of fat coal, low content of lean coal, high content of high-priced low-sulfur main coke, and low content of low-priced high-sulfur main coke. Although this coal blending structure can guarantee the quality of blast furnace coke, the cost is very high. Contents of the invention...

Examples

Embodiment 1

[0025] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0026] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0027] (1) No. 35 coal:

[0028] The caking index G value of No. 35 coal I is 80%; the caking index G value of No. 35 coal II is 75%; the caking index G value of No. 35 coal III is 65%.

[0029] (2) High sulfur No. 25 coking coal:

[0030] High sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the content of low metamorphic coal is 0.4%, and the low metamorphic coal is lignite and long-flame coal with a mass ratio of 1:2 Mixed coal; the content of high metamorphic coal is 0.8%, and the high metamorphic coal is a mixed coal of anthracite, lean c...

Embodiment 2

[0042] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0043] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0044] (1) No. 35 coal:

[0045] The caking index G value of No. 35 coal I is 75%; the caking index G value of No. 35 coal II is 70%; the caking index G value of No. 35 coal III is 68%.

[0046] (2) High sulfur No. 25 coking coal:

[0047] High-sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the low metamorphic degree coal content is 0.5%, and the low metamorphic degree coal is a mixed coal of lignite and long-flame coal in a mass ratio of 1:1; The content of high metamorphic coal is 0.8%. The high metamorphic coal is a mixture of anthracite,...

technical field

[0001] The invention relates to the technical field of metallurgy, in particular to a top-loaded coke blended coal. Background technique

[0002] As blast furnaces have higher and higher requirements for coke quality stability, higher requirements have been put forward for the stability of incoming coal quality. How to make full use of coal rock analysis to control incoming coal quality, optimize coal blending structure, and reduce coal blending costs has become an important issue. A major research topic facing the coking industry.

[0003] In order to ensure the quality of blast furnace coke and ensure the melting efficiency, the conventional coal blending structure has high content of fat coal, low content of lean coal, high content of high-priced low-sulfur main coke, and low content of low-priced high-sulfur main coke. Although this coal blending structure can guarantee the quality of blast furnace coke, the cost is very high. Contents of the invention...

Examples

Embodiment 1

[0025] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0026] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0027] (1) No. 35 coal:

[0028] The caking index G value of No. 35 coal I is 80%; the caking index G value of No. 35 coal II is 75%; the caking index G value of No. 35 coal III is 65%.

[0029] (2) High sulfur No. 25 coking coal:

[0030] High sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the content of low metamorphic coal is 0.4%, and the low metamorphic coal is lignite and long-flame coal with a mass ratio of 1:2 Mixed coal; the content of high metamorphic coal is 0.8%, and the high metamorphic coal is a mixed coal of anthracite, lean c...

Embodiment 2

[0042] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0043] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0044] (1) No. 35 coal:

[0045] The caking index G value of No. 35 coal I is 75%; the caking index G value of No. 35 coal II is 70%; the caking index G value of No. 35 coal III is 68%.

[0046] (2) High sulfur No. 25 coking coal:

[0047] High-sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the low metamorphic degree coal content is 0.5%, and the low metamorphic degree coal is a mixed coal of lignite and long-flame coal in a mass ratio of 1:1; The content of high metamorphic coal is 0.8%. The high metamorphic coal is a mixture of anthracite,...

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