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Method for identifying weathering oxidative deterioration degree of coking coal

A technology for oxidative metamorphism and coking coal, applied in coking ovens, material inspection products, instruments, etc., can solve the problems of small data changes, inability to accurately judge coking coal, and inability to determine the time of weathering and oxidative metamorphism

Inactive Publication Date: 2020-12-04
SGIS SONGSHAN CO LTD
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Problems solved by technology

[0008] The above-mentioned techniques, whether it is the determination of volatile matter, or caking performance (G value, y value), or the elemental analysis in the organic matter of coal, or the calorific value analysis of coal, due to the small range of data changes (especially in key Within the first three months), most of the changes did not exceed the allowable analysis error range of the national standard, so it is impossible to accurately determine whether the coking coal has been weathered and oxidized, let alone determine the time of weathering and oxidation deterioration

Method used

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  • Method for identifying weathering oxidative deterioration degree of coking coal
  • Method for identifying weathering oxidative deterioration degree of coking coal
  • Method for identifying weathering oxidative deterioration degree of coking coal

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Embodiment 1

[0081] Australian PLV main coking coal, northern main coking coal, Australian Fengjing main coking coal and Australian LV coking coal were obtained as imported A coking coal, Shanxi coking coal, imported B coking coal, and imported C coking coal, and the coking coal was collected without weathering. The month is recorded as January, and then the coking coal is placed in the open air, and the maximum fluidity of the four groups of coking coal is collected every month (30 days), and the first to eleventh months of its weathering and oxidation are sequentially regarded as month 2 -December, the results are shown in Table 1.

[0082] Table 1 Statistical table of the change of coking coal's maximum fluidity with weathering time

[0083]

[0084]

[0085] According to Table 1, it can be seen that the rate of change of the maximum Gibbs flowability of imported A coking coal, Shanxi coking coal, and imported B coking coal is consistent with the identification method provided in ...

Embodiment 2

[0095] Shaoguan Iron and Steel of Baowu Group used a shipment of Australian "Gon" coking coal spot this year, which is a relatively top-level main coking coal among Australian main coking coals. However, during the blending process of Shaogang, it was found that this coal failed to play the role of the main coking coal. Although the appearance index was good, the coke strength support was weak. The comparison between the typical values ​​of the main coal quality indicators of this coal (the typical value is the value of unweathered oxidative deterioration) and the actual indicators of the ship’s coal is shown in Table 2.

[0096] Among them, in Table 2, Vdaf: volatile matter on a dry ash-free basis, Ad: ash content, St.d: total sulfur on a dry basis, G: cohesion index, Y: maximum thickness of the colloidal layer, X: final shrinkage of the colloidal layer .

[0097] Table 2 Comparison of measured values ​​and typical values ​​of Gon coking coal

[0098]

[0099]

[0100...

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Abstract

The invention provides a method for identifying the weathering oxidative deterioration degree of coking coal, and relates to the technical field of coal identification. According to the method for identifying the weathering oxidative deterioration degree of the coking coal, the actual Giseeler maximum fluidity and the reference Gieseler maximum fluidity of the coking coal are used as indexes for identifying whether the coking coal is weathered and oxidized or not, and the indexes are remarkable in change amplitude and change trend in a short time; and the weathering oxidative time can be quantitatively judged, the weathering oxidation within three months can be accurately judged, the problems in the prior art can be effectively solved, and meanwhile, the operation is convenient.

Description

technical field [0001] The present application relates to the technical field of coal identification, in particular, to a method for identifying the degree of weathering and oxidation deterioration of coking coal. Background technique [0002] The oxidation of coal can be divided into low-temperature oxidation and high-temperature oxidation according to different temperatures, and low-temperature oxidation can be subdivided into two types: the first type is from room temperature to about 100°C, where coal placed in the air combines with oxygen in the air to form a surface Coal-oxygen complexes, and further oxidative decomposition and deterioration. The second type is at 100-300°C, the coal sample placed in the air combines with oxygen to form a complex regenerative humic acid soluble in alkali. The second type is often accompanied by the first type of oxidation, so the degree of oxidation is deeper . The first type of oxidation occurs when coal is exposed to the air at roo...

Claims

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Application Information

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IPC IPC(8): C10B57/04G01N11/10G01N21/88G01N33/22
CPCC10B57/04G01N11/10G01N21/8851G01N33/222G01N2021/8854G01N2021/8874
Inventor 程启国丘文生陈锡通余骏刘克辉钟寿军包锋范国光梁开慧曾广智鲁江邹全荣沈建明曾令鹏田静
Owner SGIS SONGSHAN CO LTD
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