Coking coal blending method using high-expansion coking coal
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A high-expansion, coal blending coking technology, used in coke ovens, petroleum industry, etc., can solve the problems of reduced hot and cold strength of coke, non-densification, loose coke, etc., and achieve the effect of reducing coal blending costs.
Inactive Publication Date: 2012-07-25
武汉钢铁有限公司
View PDF4 Cites 18 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Use conventional high-quality coking coal without adjusting the proportion of other coal types. The expansion of the mixed coal is too high, the coke produced is loose and not dense, and the hot and cold strength of coke is reduced.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] The present invention will be further described below in conjunction with specific examples.
[0012] A coal blending and coking method for high-expansion coking coal of the present invention comprises the step of mixing individual coking coals, the single coking coals including gas coal, gas-fertilized coal, fat coal, 1 / 3 coking coal, high Expansion coking coal, coking coal 1#, coking coal 2#, lean coal. The industrial analysis results of each single coal are shown in Table 1.
[0013] Table 1 Analysis results of single coal quality
[0014]
[0015]
[0016] Among them, the weight percentage of high-expansion coking coal is 10-20%, the weight percentage of gas coal is 0-5%, the weight percentage of lean coal is 10-20%, and the sum of the weight percentage of gas coal and lean coal is 15-20% ; The weight percentage of fat coal is 0-15%; By adjusting the proportion of other single coking coals, the Aurora expansion degree b value of the mixed coal is <10%, the c...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
thickness
aaaaa
aaaaa
cohesion index
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a coking coal blending method using high-expansion coking coal. In the method, the Aoya expansion degree b, the caking index G and the proportion of the coking coarse-grain mosaic texture in the blended coal are used as control indexes; and by increasing the dosage of the weakly-caking gas coal and lean coal, limiting the dosage of fat coal and mixing with the high-expansion coking coal, gas fat coal, 1 / 3 coking coal, coking coal 1# and coking coal 2# to prepare the blended coal, the coking coal 1# can be partially replaced by the high-expansion coking coal, and the coal blending cost is remarkably reduced, wherein in the high-expansion coking coal, the caking index G is greater than or equal to 85, the maximum thickness Y of the gelatinous layer is 18-23mm, the proportion of the dry-ash-free volatile component Vdaf is 23-25%, the maximum Gieseler fluidity lgMF is 3-4, the Aoya expansion degree b is greater than 80%, and the proportion of the single coal coking coarse-grain mosaic texture is greater than 60%; in the coking coal 1#, the proportion of the coking coarse-grain mosaic texture is greater than 60%, and the Aoya expansion degree b is less than 60%; and in the coking coal 2#, the proportion of the coking coarse-grain mosaic texture is less than 60%. Moreover, without the technological conditions of graded breaking, coal moisture control, briquetting technology, tamping coking and the like, the CSR of the coke smelted by a coke oven higher than 6m is greater than 63%.
Description
technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a method for coking coal blending. Background technique [0002] Coking coal is the main support for the quality of coke, and the quality of coking coal has a great influence on the quality of coke. At present, the coking coal of coking enterprises is evaluated and selected according to the G value of the cohesive index, the Y value of the maximum thickness of the colloidal layer, and the reflectance of the vitrinite group. In practical applications, it often happens that the coking coal that meets the requirements of high-quality coking coal in various conventional indicators is used for coal blending and coking, but the quality of the produced coke is inferior. For example, Guizhou coking coal has a volatile fraction of 23-25%, a Y value of 18-23mm, a G value of ≥85, and a value of Auya expansion degree b of more than 80% (conventional coking coal Auya...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.