CN103923678B - Coking coal blending method of improving homogeneity coefficient of coke size - Google Patents
Coking coal blending method of improving homogeneity coefficient of coke size Download PDFInfo
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- CN103923678B CN103923678B CN201410167134.2A CN201410167134A CN103923678B CN 103923678 B CN103923678 B CN 103923678B CN 201410167134 A CN201410167134 A CN 201410167134A CN 103923678 B CN103923678 B CN 103923678B
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Abstract
The invention discloses a coking coal blending method of improving homogeneity coefficient of coke size. The method comprises the following steps: determining the average maximum reflectivity, the solid-soft temperature interval region, the Gieseler fluidity and the coking optical organization structure of a single coal vitrinite; according to a test result, selecting the type of coal in percentage by weight of 15-18%, wherein formula is greater than or equal to 2.0% and the coking optical organization structure is 100% an inertial component; smashing till the part with particle size less than or equal to 0.4mm is over 90%; 2) selecting the type of coal in percentage by weight of 30-40%, wherein formula is 0.6-1.1%, the solid-soft temperature interval region is greater than 95 DEG C, the maximum Gieseler fluidity log value logMF is greater than 4 and the inertial component of the coking optical organization structure is less than or equal to 25%; 3) selecting the type of coal in percentage by weight of 20-40%, wherein formula is 1.1-2.0% and the granular inlay component of the coking optical organization structure is greater than or equal to 60%; and 4) selecting the type of coal in percentage by weight of 20-60%, wherein formula is 1.1-2.0% and the granular inlay component of the coking optical organization structure is greater 20-60%, and blending coal according to a certain proportional range. According to the coal blending method disclosed by the invention, the coke is uniform in grain size, high in cold and heat state strengths and low in coal blending cost.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of coke making and coal blending method improving coke size uniformity ratio.
Background technology
Coke plays a part thermal source, reductive agent, carburizing agent and stock column skeleton in blast furnace.In blast furnace, coke and ore are that profile is irregular, the inhomogenous bulk material of granularity, the ventilation property of bulk cargo layer is relevant with the homogeneity of bulk cargo granularity, improve with bulk cargo particle size uniformity, the voidage of bulk cargo layer increases, the air permeance resistance coefficient of the bed of material reduces, having improved breathability of stock column, thus contributes to developing indirect reduction.
The shrink grading X value of Gas Coal for Cokemaking, rich coal, 1/3 coking coal, coking coal and lean coal is general between 20 ~ 50mm.Coking in cell-type coking chamber, utilize traditional coal-blending coking method that bottle coal, rich coal, 1/3 coking coal, coking coal and lean coal coordinate according to a certain percentage, gained coke size uniformity coefficient (weight of coke/complete burnt amount of granularity 40 ~ 60mm) is general 40 ~ 45%.
There is following defect in current Coal Blending Schemes:
1, to refine coke size homogeneity poor, and do not improve the research of the coal-blending coking method of coke size homogeneity.
2, coal blending cost is higher, and two kinds of cheap coals seldom use in coal blending below:
A. hard coal.Hard coal metamorphic grade is high, the average maximum reflectivity of vitrinite
more than 2.0%, fugitive constituent 6 ~ 10%, not there is cohesiveness, in Coking Process of being heated, softening melting does not occur, do not have plastic mass to generate, therefore its coal grain both can not expand and also can not shrink, easily coking Crack Center is formed, deteriorated coke cold and hot state intensity, therefore general not adapted in coal-blending coking process, or by after broken for its fine powder, allocate 3 ~ 5% into.The general coking coal of anthracitic cost ratio is low about 250 yuan.
B. the average maximum reflectivity of vitrinite
be between 0.6 ~ 1.1%, consolidate the lower rotten height flowing coking coal of-interval > 95 DEG C of softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4.The shrink grading X value of such coking coal is up to 30 ~ 50mm, and between 26 ~ 43%, (wherein, the average maximum reflectivity of vitrinite is 0.85 ~ 1.1% to fugitive constituent, and fugitive constituent is between 26 ~ 34%; The average maximum reflectivity of vitrinite
be 0.6 ~ 0.85%, fugitive constituent is between 34 ~ 43%).In order to ensure coking rate and coke lumpiness, general adapted amount is (wherein, the average maximum reflectivity of vitrinite within 20%
be 0.85 ~ 1.1%, coking coal and the vitrinite average maximum reflectivity of fugitive constituent between 26 ~ 34%
be 0.6 ~ 0.85%,
Within the coking coal of fugitive constituent between 34 ~ 43% each 10%), the general coking coal of cost ratio of such coal is low about 150 yuan.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of coke making and coal blending method improving coke size uniformity ratio, to overcome the lower defect of traditional coal-blending coking method gained coke size uniformity coefficient, contributes to blast furnace development indirect reduction.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
Improve a coke making and coal blending method for coke size uniformity ratio, comprise and measure the average maximum reflectivity of each single grade coal vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carry out following steps:
1) the average maximum reflectivity of vitrinite is selected
for>=2.0%, coking optical texture 100% is the coal of inert component, and be crushed to granularity≤0.4mm part and account for more than 90%, allocation ratio is 15 ~ 18% by weight percentage;
2) the average maximum reflectivity of vitrinite is selected
be 0.6 ~ 1.1%, solid-softening temperature interval > 95 DEG C, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25% coal, allocation ratio is 30 ~ 40% by weight percentage;
3) the average maximum reflectivity of vitrinite is selected
be 1.1 ~ 2.0%, the granular component>=60% coal allocation ratio of inlaying of coking optical texture is 20 ~ 40% by weight percentage;
4) other insufficient sections allocate the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1 ~ 2.0%, coking optical texture is granular inlays the coal that component is 20 ~ 60%.
Further, described step 2) in, select the average maximum reflectivity of vitrinite
be 0.6 ~ 0.85%, solid-softening temperature interval > 95 DEG C, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25% coal.
The average maximum reflectivity of the vitrinite that the present invention allocates into
high degree of coalification coal, in Coking Process of being heated, softening melting does not occur, do not have plastic mass to generate, therefore its coal grain both can not expand and also can not shrink, and after coking, optical texture 100% is inert component.The high degree of coalification coal grain of suitable proportion is uniformly distributed between other coals, plays slow down and homogenizing the expansion of other coal and contraction, and the crack distribution rule of formation, coke particle diameter is even.And low rotten height flowing coking coal plastic mass is enriched, spreadability is good, holds lazy ability strong.The average maximum reflectivity of these two kinds of coals and vitrinite
be 1.1 ~ 2.0%, the granular average maximum reflectivity of coal and vitrinite inlaying component>=60% of coking optical texture
be 1.1 ~ 2.0%, coking optical texture granular inlay component be 20 ~ 60% coal cooperatively interact, act synergistically, the cold and hot state intensity of institute's coking charcoal can also be ensured preferably.Coal-blending coking gained coke size uniformity coefficient (weight/complete burnt amount of granularity 40 ~ 60mm) >=70% is carried out according to method of the present invention; Hot strength of coke CSR >=63%, M40 >=86%, M10≤6%; Coking power reaches 76%, and coal blending cost is lower than traditional Blending 20 ~ 50 yuan/ton.
Embodiment:
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
The coke making and coal blending method of raising coke size uniformity ratio of the present invention, comprises and measures the average maximum reflectivity of each single grade coal volatile matter vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carry out following steps:
1) the average maximum reflectivity of vitrinite is selected
for>=2.0%, coking optical texture 100% is the coal of inert component, and be crushed to granularity≤0.4mm part and account for more than 90%, allocation ratio is 15 ~ 18% by weight percentage;
2) the average maximum reflectivity of vitrinite is selected
be 0.6 ~ 1.1%, solid-softening temperature interval > 95 DEG C, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25% coal, allocation ratio is 30 ~ 40% by weight percentage;
3) the average maximum reflectivity of vitrinite
be 1.1 ~ 2.0%, the granular component>=60% coal allocation ratio of inlaying of coking optical texture is 20 ~ 40% by weight percentage;
4) other insufficient sections allocate the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1 ~ 2.0%, coking optical texture is granular inlays the coal that component is 20 ~ 60%.
Specific embodiment sees the following form.
Powder craft after tradition is first joined, without precomminution and selective molecular attraction, without coal damping, without moulded coal, under the dress coke oven dry coke quenching condition of tradition more than 4.3 meters top, above-described embodiment 1, embodiment 2, embodiment 3 gained coke size uniformity coefficient (weight of coke/complete burnt amount of granularity 40 ~ 60mm) are 70 ~ 75%; Hot strength of coke CSR at 63 ~ 65%, M40 at 86 ~ 88%, M10 5.5 ~ 6%.
Claims (2)
1. improve a coke making and coal blending method for coke size uniformity ratio, it is characterized in that: comprise and measure the average maximum reflectivity of each single grade coal vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carry out following steps:
1) the average maximum reflectivity of vitrinite is selected
for>=2.0%, coking optical texture 100% is the coal of inert component, and be crushed to granularity≤0.4mm part and account for more than 90%, allocation ratio is 15 ~ 18% by weight percentage;
2) the average maximum reflectivity of vitrinite is selected
be 0.6 ~ 1.1%, solid-softening temperature interval > 95 DEG C, maximum Giseeler fluidity logarithmic value lgMF > 4, coking optical texture inert component≤25% coal, allocation ratio is 30 ~ 40% by weight percentage;
3) the average maximum reflectivity of vitrinite is selected
be 1.1 ~ 2.0%, the granular component>=60% coal allocation ratio of inlaying of coking optical texture is 20 ~ 40% by weight percentage;
4) other insufficient sections allocate the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1 ~ 2.0%, coking optical texture is granular inlays the coal that component is 20 ~ 60%.
2. the coke making and coal blending method of raising coke size uniformity ratio according to claim 1, is characterized in that: described step 2) in, select the average maximum reflectivity of vitrinite
be 0.6 ~ 0.85%, solid-softening temperature interval > 95 DEG C, maximum Giseeler fluidity logarithmic value lgMF > 4, coking optical texture inert component≤25% coal, allocation ratio is 30 ~ 35% by weight percentage.
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| CN104312608B (en) * | 2014-11-10 | 2016-08-17 | 武汉钢铁(集团)公司 | Height based on charred coal organization structure go bad coking coal participate in coking blending method |
| CN104479708B (en) * | 2014-11-14 | 2016-06-29 | 武汉钢铁(集团)公司 | The regulation and control method of coke strenth |
| CN110591748B (en) * | 2019-09-29 | 2021-03-09 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN111253961B (en) * | 2020-01-21 | 2021-05-28 | 鞍钢股份有限公司 | Coking coal blending method for improving average particle size of coke and improving particle size distribution of coke |
| CN111592901B (en) * | 2020-06-03 | 2021-08-17 | 河北中煤旭阳能源有限公司 | Method for improving fineness and granularity composition of tamping coke blended coal |
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| CN101081989A (en) * | 2007-06-29 | 2007-12-05 | 武汉钢铁(集团)公司 | Coal coking blending method |
| CN101284997A (en) * | 2008-05-28 | 2008-10-15 | 神华集团有限责任公司 | Process for producing first-class metallurgical coke by coking coal with high sulphur and high ash |
| CN101294088A (en) * | 2008-06-20 | 2008-10-29 | 武汉钢铁(集团)公司 | Fine distribution method for byerlyte |
| CN101880541A (en) * | 2010-06-25 | 2010-11-10 | 神华集团有限责任公司 | Method for producing primary metallurgical coke by using 1/3 charred coal in west Mongolia region as main blending coal |
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| JP2002317185A (en) * | 2001-04-20 | 2002-10-31 | Nkk Corp | Method for manufacturing coke for metallurgy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081989A (en) * | 2007-06-29 | 2007-12-05 | 武汉钢铁(集团)公司 | Coal coking blending method |
| CN101284997A (en) * | 2008-05-28 | 2008-10-15 | 神华集团有限责任公司 | Process for producing first-class metallurgical coke by coking coal with high sulphur and high ash |
| CN101294088A (en) * | 2008-06-20 | 2008-10-29 | 武汉钢铁(集团)公司 | Fine distribution method for byerlyte |
| CN101880541A (en) * | 2010-06-25 | 2010-11-10 | 神华集团有限责任公司 | Method for producing primary metallurgical coke by using 1/3 charred coal in west Mongolia region as main blending coal |
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Effective date of registration: 20170721 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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