CN104593028A - Method for producing high-quality metallurgical coke by using coal and rock indexes - Google Patents
Method for producing high-quality metallurgical coke by using coal and rock indexes Download PDFInfo
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- CN104593028A CN104593028A CN201510020796.1A CN201510020796A CN104593028A CN 104593028 A CN104593028 A CN 104593028A CN 201510020796 A CN201510020796 A CN 201510020796A CN 104593028 A CN104593028 A CN 104593028A
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- coal
- index
- coking
- coke
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
Abstract
The invention discloses a method for producing high-quality metallurgical coke by using coal and rock indexes, and belongs to the technical field of blended coal for coking. According to the method, the target of producing high-strength metallurgical coke is achieved by controlling the distribution ranges of volatile index Vdaf, the caking index G, the maximal gelatinous layer thickness Y and the vitrinite mean maximum reflectance Rmax (0.9%-1.5%). According to the method, the feeding ratios of fat coal and coking coal can be reduced to about 50%; the heat intensity CSR of the coke is over 65%; and the requirements of over 2500m<3> blast furnace ironmaking are met.
Description
Technical field
The invention belongs to Coking Coal Blending Technology field, be specifically related to the coke making and coal blending method that a kind of coal petrography index produces high quality metallurgical coke.The invention solves coal petrology theoretical direction coal-blending coking and be difficult to operation aborning, the problem that coal petrology instructs coal-blending coking advantage can not be played.
Background technology
Although coal resources in China is abundanter, the coking coal that coking coal only accounts for all coal resources but production metallurgy Jiao needs to allocate into, rich coal ratio reach more than 50% usually.Along with blast furnace maximizes, the specification of quality of large volume blast furnace to metallurgical coke is higher, because many enterprises coke making and coal blending is still with experience coal blending 29%, and coking coal indispensable in coking raw material and rich coal resource less, account for 23% of coking coal resource, 12% respectively, be main, in order to produce high quality metallurgical coke, often be achieved in the mode of the allocation ratio increasing rich coal and coking coal, but the allocation ratio of rich coal and coking coal also can be caused excessive, add coal blending cost, and the problem that quality of metallurgical coke increasing degree is comparatively limited.Blending of Coal Petrography is the blending method of science the most at present, instructs coke making and coal blending by coal petrography index, is conducive to improving coal blending science, and this reduces coal blending cost significant to the consumption reducing high-quality caking coal resource.
The coal blending of coal petrography theoretical direction can improve the science of coal blending, as patent CN 201010203653.1, a kind of Blending of Coal Petrography coking process producing low reactivity, high-heat strength coke, it is characterized in that: carry out proportioning in the ratio in the vitrinite reflectance different distributions interval of coal, control each interval (R
max≤ 0.75,0.76 ~ 1.05,1.06 ~ 1.50,1.51 ~ 1.90,10 ~ 40% and>=1.91 distributed areas) ratio, control the ratio of melting than G/Vt (G is coal blending caking index value, and Vt (%) is coal blending vitrinite component concentration) between 1.08 ~ 1.20.As patent CN02104195.4, utilize coal petrography analysis to carry out the method for coal-blending coking, it is characterized by, be the single grade coal participating in coal blending is equipped with inert material simulation coking, draw the intensity index a of this single grade coal when different inert thing content
singlelive with the best of this single grade coal and inert material and lazyly compare b
single, according to a
singleand b
singlecomputed strength index SI ＇ and Compositional balance index CBI ＇, and make iso-intensity curve.During application, as long as record the active component content of each single grade coal in coal blending, just can calculate SI ＇ and the CBI ＇ value of coal blending, infer the intensity coke.The Blending of Coal Petrography coking test method of this patent simplifies to get on the basis of A Mosuofu and Shi Piluofa.As patent CN201210314984.1, a kind of Blending of Coal Petrography method being applicable to tamping coking, is characterized in that: according to the lazy average reflectance R more maximum than A/I, vitrinite of the work of coking single grade coal
maxwith random reflectance of vitrinite R
edistribution proportion carries out proportioning, be required to meet the work of the mixed coal after mixture lazy than A/I be 2.0 ~ 2.5, the maximum average reflectance of the vitrinite of mixed coal is the random reflectance of vitrinite R of 1.00% ~ 1.40% and mixed coal
edistribution histogram is continuous.
There are following 2 deficiencies in several coke making and coal blending method above.First method is loaded down with trivial details, higher to measurement result accuracy requirement; Its two be difficult in actual coal blending production realize, practicality is not strong.
Summary of the invention
Rich coal and coking coal ratio need be improved for high quality metallurgical coke will be produced under coalingging coke making process on top, and there is mixed coal phenomenon in rich coal and coking coal sometimes in actual production, and different batches carrys out its mixed coal degree difference of coal, if by means of only control rich coal and coking coal ratio, be difficult to ensure quality of metallurgical coke, sometimes also can cause rich coal and coking coal allocation ratio too high, add the problem of coal blending cost.Main purpose of the present invention coke making process (generally apply, common) of coalingging on top provides a kind of coal petrography index by controlling coking mixed coal and technic index, produces the method meeting the high quality metallurgical coke of large volume blast furnace needs.
In order to realize above technical purpose, the present invention is achieved by the following technical programs.
A kind of method utilizing coal petrography index to produce high quality metallurgical coke of the present invention, by controlling coal petrography index and the conventional index thereof of mixed coal, rich coal and coking coal is made to control in proper ratio scope, coaling on the basis of coke making process on top, achieve the coke making and coal blending method producing high-strength metallurgical Jiao, concrete Coal Blending Schemes is:
The various allocation ratio of mixed coal (by weight percentage), 1/3 coking coal or bottle coal (22 ~ 25): gas-fat coal (8 ~ 15): rich coal (12 ~ 17): coking coal (35 ~ 44): lean coal (9 ~ 10); Coal blending tolerance range more than 98.5%; Mixed coal fineness: below as-fired coal fineness 3mm accounts for more than 80%; Mixed coal moisture: be 10% ~ 11% by weight percentage;
The conventional index of described mixed coal refers to volatile matter index, agglutinating value(of coal) index, the maximum thickness of colloidal matter layer index of mixed coal, and the coal petrography index of described mixed coal refers to the average maximum reflectivity R of mixed coal vitrinite
maxat 0.9% ~ 1.5% distribution range proportion, specifically: volatile matter index V
dafcontrol is not more than 30%, and caking index G controls to be not less than 80, and maximum thickness of colloidal matter layer Y controls to be not less than 16mm, the average maximum reflectivity R of vitrinite
maxcontrol between 48 ~ 62% at 0.9% ~ 1.5% distribution range proportion.
High quality coke of the present invention refers to coke shatter strength M
40be greater than 85%, abrasive wear resistance M
10be less than 6%, coke reactivity CRI is less than 26%, and the coke that postreaction strength of coke CSR is greater than 65% can meet 2500m completely
3and above blast-furnace smelting needs.
The principles of science of the present invention:
Here the volatile matter index V of mixed coal is selected
daf, agglutinating value(of coal) index caking index G and maximum thickness of colloidal matter layer Y, mixed coal coal petrography index control mixed coal quality.Volatile matter index V
dafthe important factor affecting coking power and metallurgical coke lumpiness, V
dafcontrol is not more than 30%.Caking index G characterizes the ability of cohering self and inert material of coking coal, and G controls to be not less than 80, and maximum thickness of colloidal matter layer Y characterizes in the process of coking of coking coal and produces plastic mass quantity, and Y controls to be not less than 16mm.This two indices of G and Y can reflect the cohesiveness of mixed coal well.The coal petrography index of mixed coal refers to the average maximum reflectivity R of the vitrinite of mixed coal
maxat 0.9% ~ 1.5% distribution range proportion, it is a comprehensive index, because vitrinite's average maximum reflectivity distribution major part of coking coal and rich coal is in this scope, ensure that this scope proportion makes mixed coal have certain cohesiveness and coking property, this scope control is about 50%.
Compared with prior art, the present invention has following technique effect:
1, adopt existing top to coaling coke making process route, technique is simple, and does not need to increase pre-processing device, is easier to application;
2, traditional problem of pushing up technique raising gas-fat coal allocation ratio of coalingging and coke strenth being declined to a great extent is overcome, by controlling volatile matter index V
daf, caking index G, maximum thickness of colloidal matter layer Y and the average maximum reflectivity R of vitrinite
max(0.9% ~ 1.5%) distribution range, achieves the object of producing high-strength metallurgical Jiao;
3, reduce the allocation ratio of rich coal and coking coal, decrease high-quality caking coal resource consumption;
4, the reduction of coal-blending coking cost is conducive to;
5, adopt this method gas-fat coal allocation ratio to reach 15%, rich coal and coking coal allocation ratio can be reduced to about 50%, and hot strength of coke CSR reaches more than 65%, meets 2500m
3the needs of above blast furnace ironmaking.
Embodiment
Below in conjunction with specific embodiment in detail the present invention is described in detail, but the present invention is not limited to following embodiment.
Adopt 6m coking by coke oven, coking time 20h, dry quenching(of coke).The coking coal used has six large class, i.e. bottle coal, 1/3 coking coal, gas-fat coal, rich coal, coking coal and lean coals.Bottle coal is from Zaozhuang, Shandong mineral bureau and Xinwen Mining Administration, and 1/3 coking coal is from Henan Ping Mei group, and gas-fat coal is from Shandong Xinwen Mining Administration, and rich coal Zaozhuang, Shandong mineral bureau, coking coal is from Strategy of Shanxi Coking Coal Group, and lean coal is from Northern Huaihe River Anhui mineral bureau.
First respectively total quality analysis is carried out to coking coal; Secondly 13 kinds of Coal Blending Schemes are set to by these coals by different ratios, each Scheme Choice 1/3 coking coal or bottle coal 22% ~ 25%, gas-fat coal 8% ~ 15%, rich coal 12% ~ 17%, coking coal 35% ~ 44% and lean coal are 9% ~ 10%, obtain 13 Coal Blending Schemes, concrete scheme is in table one; Ensure ash content A
d8.8% ~ 9.4%, sulphur content S
t,d0.71% ~ 0.94%, dry ash-free basis volatile matter V
daf29% ~ 30%, caking index G more than 80, the maximum average reflectance R of mixed coal vitrinite
max(0.9% ~ 1.5%) distribution range controls about 50%, refine coke quality as shown in Table 2, M
40value can remain on about 89, M
10value between 5.2 ~ 5.6, CRI value between 22 ~ 24, CSR value is between 68 ~ 70.
Table one coal blending concrete scheme of the present invention
Table two coke making and coal blending of the present invention and coke quality data sheet
From above two tables, under Coal Blending Schemes condition of the present invention, by the basis ensureing bond performance and coal petrography index request, reach the object ensureing metallurgical coke intensity.
Claims (1)
1. the method utilizing coal petrography index to produce high quality metallurgical coke, it is characterized in that, by controlling coal petrography index and the conventional index thereof of mixed coal, rich coal and coking coal is made to control in proper ratio scope, coaling on the basis of coke making process on top, achieve the coke making and coal blending method producing high-strength metallurgical Jiao, concrete Coal Blending Schemes is: by weight percentage, and the proportioning of 1/3 coking coal or bottle coal, gas-fat coal, rich coal, coking coal, lean coal is 22 ~ 25: 8 ~ 15: 12 ~ 17: 35 ~ 44: 9 ~ 10; Coal blending tolerance range more than 98.5%; Mixed coal fineness: below as-fired coal fineness 3mm accounts for more than 80%; Mixed coal moisture: be 10% ~ 11% by weight percentage;
The conventional index of described mixed coal refers to volatile matter index, agglutinating value(of coal) index, the maximum thickness of colloidal matter layer index of mixed coal, and the coal petrography index of described mixed coal refers to the average maximum reflectivity R of mixed coal vitrinite
maxat 0.9% ~ 1.5% distribution range proportion, specifically: volatile matter index V
dafcontrol is not more than 30%, and caking index G controls to be not less than 80, and maximum thickness of colloidal matter layer Y controls to be not less than 16mm, the average maximum reflectivity R of vitrinite
maxcontrol between 48% ~ 62% at 0.9% ~ 1.5% distribution range proportion.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029577A (en) * | 2019-11-12 | 2020-04-17 | 山西沁新能源集团股份有限公司 | Method for blending coal with precursor of crystalline carbon coke powder |
| CN112080311A (en) * | 2020-08-17 | 2020-12-15 | 山西阳光焦化集团股份有限公司 | Coking coal blending and coking method for producing primary metallurgical coke by blending a large amount of lean coal |
| CN112779037A (en) * | 2021-01-20 | 2021-05-11 | 山西太钢不锈钢股份有限公司 | Method for improving wear resistance of coke |
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| CN102807883A (en) * | 2012-08-31 | 2012-12-05 | 武汉钢铁(集团)公司 | Gas-fat-doped coking and coal blending method |
| CN104073274A (en) * | 2013-03-27 | 2014-10-01 | 鞍钢股份有限公司 | Production method of metallurgy coke |
| CN104087328A (en) * | 2014-07-31 | 2014-10-08 | 孙孟君 | Coke oven coking method for improving ratio of long flame coal for chemical coke |
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| JPH04268393A (en) * | 1991-02-25 | 1992-09-24 | Nkk Corp | Manufacture of coke |
| CN101081988A (en) * | 2007-06-29 | 2007-12-05 | 武汉钢铁(集团)公司 | Gas coal joined coking blending method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029577A (en) * | 2019-11-12 | 2020-04-17 | 山西沁新能源集团股份有限公司 | Method for blending coal with precursor of crystalline carbon coke powder |
| CN111029577B (en) * | 2019-11-12 | 2023-09-29 | 山西沁新能源集团股份有限公司 | Method for blending crystalline coke powder precursor coal |
| CN112080311A (en) * | 2020-08-17 | 2020-12-15 | 山西阳光焦化集团股份有限公司 | Coking coal blending and coking method for producing primary metallurgical coke by blending a large amount of lean coal |
| CN112779037A (en) * | 2021-01-20 | 2021-05-11 | 山西太钢不锈钢股份有限公司 | Method for improving wear resistance of coke |
| CN112779037B (en) * | 2021-01-20 | 2021-12-14 | 山西太钢不锈钢股份有限公司 | Method for improving wear resistance of coke |
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Application publication date: 20150506 |