CN103923678A - 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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- CN103923678A CN103923678A CN201410167134.2A CN201410167134A CN103923678A CN 103923678 A CN103923678 A CN 103923678A CN 201410167134 A CN201410167134 A CN 201410167134A CN 103923678 A CN103923678 A CN 103923678A
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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 that improves 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, with bulk cargo particle size uniformity, improve, the voidage of bulk cargo layer increases, the air permeance resistance coefficient of the bed of material reduces, the having improved breathability of stock column, thus contribute to develop indirect reduction.
The shrink grading X value of Gas Coal for Cokemaking, rich coal, 1/3 coking coal, coking coal and lean coal is generally between 20～50mm.Coking in cell-type coking chamber, traditional coal-blending coking method of utilizing bottle coal, rich coal, 1/3 coking coal, coking coal and lean coal to coordinate according to a certain percentage, gained coke size uniformity coefficient (weight of coke of granularity 40～60mm/complete burnt amount) is generally 40～45%.
There is following defect in Coal Blending Schemes at present:
1, refine coke size homogeneity poor, and the research that does not improve the inhomogeneity coal-blending coking method of coke size.
2, coal blending cost is higher, below two kinds of cheap coals in coal blending, seldom use:
A. hard coal.Hard coal metamorphic grade is high, the average maximum reflectivity of vitrinite
more than 2.0%, fugitive constituent 6～10%, do not there is cohesiveness, softening melting does not occur in the Coking Process of being heated, do not have plastic mass to generate, therefore its coal grain neither can expand and also can not shrink, in coal-blending coking process, easily form coking Crack Center, deteriorated coke cold and hot state intensity, therefore general adapted not, or after its fine powder is broken, allocate 3～5% into.The general coking coal of anthracitic cost ratio is low approximately 250 yuan.
B. the average maximum reflectivity of vitrinite
be between 0.6～1.1%, the lower rotten height of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4 flows coking coal.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 guarantee coking rate and coke lumpiness, general adapted amount 20% with interior (wherein, the average maximum reflectivity of vitrinite
be 0.85～1.1%, coking coal and the vitrinite average maximum reflectivity of fugitive constituent between 26～34%
be 0.6～0.85%,
Fugitive constituent the coking coal between 34～43% each within 10%), the general coking coal of cost ratio of such coal is low approximately 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 that improves 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 Ge Danzhong coal vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carries out following steps:
1) select the average maximum reflectivity of vitrinite
for>=2.0%, coking optical texture 100% is the coal of inert component, is crushed to granularity≤0.4mm and partly accounts for more than 90%, allocation ratio is 15～18% by weight percentage;
2) select the average maximum reflectivity of vitrinite
be 0.6～1.1%, the coal of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25%, allocation ratio is 30～40% by weight percentage;
3) select 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 are allocated the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1～2.0%, the granular component of inlaying of coking optical texture is 20～60% coal.
Further, described step 2) in, select the average maximum reflectivity of vitrinite
be 0.6～0.85%, the coal of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25%.
The average maximum reflectivity of vitrinite that the present invention allocates into
high degree of coalification coal, in the Coking Process of being heated, there is not softening melting, do not have plastic mass to generate, so its coal grain neither can expand and also can not shrink, after coking, optical texture 100% is inert component.The high degree of coalification coal grain of suitable proportion is uniformly distributed between other coals, and the expansion of other coal and contraction are played and slowed down and homogenizing, the crack distribution rule of formation, coke particle diameter is even.And the mobile coking coal plastic mass of low rotten height is abundant, 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 of inlaying component>=60% of coking optical texture
be 1.1～2.0%, the granular component of inlaying of coking optical texture is that 20～60% coal cooperatively interacts, acts synergistically, and can also guarantee preferably the cold and hot state intensity of institute's coking charcoal.According to method of the present invention, carry out coal-blending coking gained coke size uniformity coefficient (weight of granularity 40～60mm/complete burnt amount) >=70%; Hot strength of coke CSR >=63%, M40 >=86%, M10≤6%; Coking power reaches 76%, and coal blending cost is lower 20～50 yuan/ton than traditional Blending.
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 Ge Danzhongmei volatile matter vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carries out following steps:
1) select the average maximum reflectivity of vitrinite
for>=2.0%, coking optical texture 100% is the coal of inert component, is crushed to granularity≤0.4mm and partly accounts for more than 90%, allocation ratio is 15～18% by weight percentage;
2) select the average maximum reflectivity of vitrinite
be 0.6～1.1%, the coal of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25%, 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 are allocated the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1～2.0%, the granular component of inlaying of coking optical texture is 20～60% coal.
Specific embodiment sees the following form.
Powder craft after tradition is first joined, without precomminution and selectivity pulverize, without coal damping, without moulded coal, under 4.3 meters of above top dress coke oven dry coke quenching conditions of tradition, above-described embodiment 1, embodiment 2, embodiment 3 gained coke size uniformity coefficients (weight of coke of granularity 40～60mm/complete burnt amount) are 70～75%; Hot strength of coke CSR at 63～65%, M40 at 86～88%, M10 5.5～6%.
Claims (2)
1. a coke making and coal blending method that improves coke size uniformity ratio, is characterized in that: comprise and measure the average maximum reflectivity of Ge Danzhong coal vitrinite
gu-softening temperature is interval, the step of Giseeler fluidity and coking optical texture, according to measurement result, then carries out following steps:
1) select the average maximum reflectivity of vitrinite
for>=2.0%, coking optical texture 100% is the coal of inert component, is crushed to granularity≤0.4mm and partly accounts for more than 90%, allocation ratio is 15～18% by weight percentage;
2) select the average maximum reflectivity of vitrinite
be 0.6～1.1%, the coal of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25%, allocation ratio is 30～40% by weight percentage;
3) select 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 are allocated the average maximum reflectivity of vitrinite into according to coking enterprise resource situation
be 1.1～2.0%, the granular component of inlaying of coking optical texture is 20～60% coal.
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), select the average maximum reflectivity of vitrinite
be 0.6～0.85%, the coal of 95 ℃ of the interval > of solid-softening temperature, maximum Giseeler fluidity logarithmic value logMF > 4, coking optical texture inert component≤25%, allocation ratio is 30～35% by weight percentage.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104312608A (en) * | 2014-11-10 | 2015-01-28 | 武汉钢铁(集团)公司 | Coal blending method of high-metamorphic coking coal for coal coking based on coke optical tissue structure |
| CN104479708A (en) * | 2014-11-14 | 2015-04-01 | 武汉钢铁(集团)公司 | Coke strength regulation method |
| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN111253961A (en) * | 2020-01-21 | 2020-06-09 | 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 |
| CN111592901A (en) * | 2020-06-03 | 2020-08-28 | 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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| CN104312608A (en) * | 2014-11-10 | 2015-01-28 | 武汉钢铁(集团)公司 | Coal blending method of high-metamorphic coking coal for coal coking based on coke optical tissue structure |
| 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 |
| CN104479708A (en) * | 2014-11-14 | 2015-04-01 | 武汉钢铁(集团)公司 | Coke strength regulation method |
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| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| 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 |
| CN111253961A (en) * | 2020-01-21 | 2020-06-09 | 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 |
| 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 |
| CN111592901A (en) * | 2020-06-03 | 2020-08-28 | 河北中煤旭阳能源有限公司 | Method for improving fineness and granularity composition of tamping coke blended coal |
| 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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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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