Coking coal identification and evaluation method based on Gieseler fluidity characteristic index
A technology of Gibson's fluidity and characteristic indicators, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as coking coal quality changes, coke quality fluctuations, coking coal mixed coal, etc.
Active Publication Date: 2022-05-27
HUAIBEI MINING IND
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Problems solved by technology
With the increasing shortage of high-quality coking coal resources in China, some suppliers currently sell low-priced coal with different degrees of deterioration as coking coal that meets the classification indicators of the coal industry, resulting in serious coking coal mixing.
In addition, as the amount of imported coking coal increases, differences in the transportation and storage process can lead to changes in the quality of coking coal, causing fluctuations in the quality of coke
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[0038] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
[0039] In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments This is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0040] Thus, the following detailed description of the embodiments of the present application provided in the accompanyi...
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Abstract
The invention provides a mixed coking coal identification and evaluation method based on Gieseler fluidity characteristic indexes, and belongs to the technical field of mixed coking coal identification and evaluation. The mixed coking coal identification and evaluation method based on the Gieseler fluidity characteristic index comprises the following steps: S1, measuring a G value, lgMF, Rmax and Rran indexes of a target coal sample; s2, calculating a coal mixing index H; h = (0.15 G + 0.23 PR) / {11.4 lgMF + 3 (Rran + Rmax)}, S3, when H is greater than or equal to 0.38 and less than or equal to 1.1, the coal is coking coal, otherwise, the coal is mixed coking coal; s4, when Hlt; when the coal is 0.38, the coal can be used as 1 / 3 coking coal; s5, when Hgt; when 1.1, a small coke oven experiment needs to be carried out, a target coal sample is crushed until the fineness reaches 75%-80%, and the coal sample is used according to coking coal according to production conditions, and is fed into a small coke oven for coking after being matched; according to the method, the defects of a coking coal quality detection technology in the field of coal blending and coking are overcome, the mixed coking coal which does not meet requirements can be quickly and accurately identified, the properties of the mixed coking coal are basically evaluated, and the method is successfully applied to production practice.
Description
technical field [0001] The present application relates to the technical field of identification and evaluation of mixed coking coal, in particular, to a method for identification and evaluation of mixed coking coal based on the characteristic index of Kjeldahl mobility. Background technique [0002] With the development of large-scale blast furnaces and injection technology, as well as energy-saving and consumption-reducing indicators, stricter requirements for coke quality have been put forward. The quality of coke directly affects blast furnace production and enterprise energy consumption. Therefore, the quality of coking coal directly affects the technical and economic indicators of the enterprise, especially the cost of raw materials before iron. With the increasing shortage of domestic high-quality coking coal resources, there are some suppliers in the market that combine low-priced coal with different degrees of metamorphism to sell coking coal that meets the classific...
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IPC IPC(8): G01N33/22
CPCG01N33/222Y02P90/30
Inventor 王宇黄海峰张伟崔平欧战备刘沐周晓慧高春燕凌强雷昭刘祥春
Owner HUAIBEI MINING IND