Metallurgical coke and method of manufacturing same

A technology of coke and coal blending, applied in the coking oven, petroleum industry, etc., can solve problems such as the method of controlling the pore structure that has not yet been known, and achieve the effects of stabilizing blast furnace operation, wide selection range, and alleviating resource constraints
CN106574189AInactive Publication Date: 2017-04-19JFE STEEL CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JFE STEEL CORP
Publication Date
2017-04-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The subject of the invention provides metallurgical coke in which high-strength coke having a porous structure, which is not known in the prior art, can be obtained by adjusting the relationship between maximum fluidity and total inert content in a blended coal; and a method of manufacturing same. Coke is obtained by carbonizing a blended coal, which is composed of a plurality of brands of coal and exhibits properties within a total inert content range of 3.5-25.0 vol.% and a maximum fluidity (log MF) range of 1.8-2.3 log ddpm according to a Gieseler Plastometer, wherein the ratio of the total cross-sectional area of pores having a circularity of 0.8 or more among large pores having diameters of 100 [mu]m to 3 mm in the coke to the total cross-sectional area of the large pores is 10% or more.
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Description

technical field

[0001] The present invention relates to metallurgical coke capable of obtaining high-strength metallurgical coke by adjusting the type and blending amount of coal contained in a coal blend, and a method for producing the same. Background technique

[0002] In ironmaking processes using blast furnaces, etc., coke used as a reducing material and a heat source is produced by pulverizing raw coals of various types and blending them in predetermined ratios, and charging the resulting blended coals into coke ovens , carry out dry distillation. A blast furnace can be operated stably by maintaining good air permeability in the furnace, but for this purpose, it is effective to use high-strength metallurgical coke in the furnace that is not easily pulverized.

[0003] Regarding the idea of ​​basic coal blending for producing high-strength metallurgical coke, a model proposed by "Shiro" is known (Non-Patent Document 1). This model considers the constituent components ...

Claims

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