CN104449781B - A kind of method using coal petrography index production metallurgical coke - Google Patents
A kind of method using coal petrography index production metallurgical coke Download PDFInfo
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- CN104449781B CN104449781B CN201410625984.2A CN201410625984A CN104449781B CN 104449781 B CN104449781 B CN 104449781B CN 201410625984 A CN201410625984 A CN 201410625984A CN 104449781 B CN104449781 B CN 104449781B
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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
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Abstract
The present invention relates to a kind of method using coal petrography index production metallurgical coke, include the following steps：Set and control the conventional index of mixed coal；Set and control the coal petrography index of mixed coal；The coal petrography index and its conventional index of mixed coal are controlled, rich coal and coking coal is controlled in proper ratio scope.By controlling the coal petrography index and its common process index of mixed coal, rich coal and coking coal is controlled on the basis of proper ratio scope, coke making process of coalingging on top, realize the coke making and coal blending method for maintaining high-strength metallurgical Jiao.Solve coal petrology theoretical direction coal-blending coking to be difficult to operate in production, it is impossible to play the problem of coal petrology instructs coal-blending coking advantage.
Description
Technical field
The present invention relates to a kind of method of coke making and coal blending, more particularly to a kind of refining of coal petrography index production high quality metallurgical coke
Burnt blending method.
Background technology
Although coal resources in China comparison is enriched, coking coal only accounts for the 29% of resource, and the coking coal that coking is indispensable
It is less with rich coal resource, 23%, the 12% of coking coal resource is accounted for respectively, but production metallurgy Jiao needs coking coal, the rich coal being incorporated
Ratio is generally up to more than 50%.As blast furnace maximizes, big volume blast furnace is to the quality requirement higher of metallurgical coke, due to many enterprises
Industry coke making and coal blending is still based on experience coal blending, in order to produce high quality metallurgical coke, often to increase the allocation ratio of rich coal and coking coal
Mode be achieved, but the allocation ratio that will also result in rich coal and coking coal is excessive, and quality of metallurgical coke increasing degree more has
The problem of limit, so as to add coal blending cost.Blending of Coal Petrography is currently the blending method of science the most, instructs to refine with coal petrography index
Burnt coal blending, is conducive to improve that coal blending is scientific, this consumption to reducing high-quality caking coal resource, reducing coal blending cost has important meaning
Justice.
The coal blending of coal petrography theoretical direction can improve the science of coal blending, as patent CN 201010203653.1, one kind production are low
Reactivity, the Blending of Coal Petrography coking process of high-heat strength coke, further：By the reflectance of vitrinite different distributions section of coal
Ratio matched, control each section (Rmax≤0.75,0.76~1.05,1.06~1.50,1.51~1.90,10~
40% and >=1.91 distributed areas) ratio, control melt than G/Vt, (G is coal blending caking index value, and Vt (%) is coal blending vitrinite
Constituent content) ratio between 1.08-1.20.Such as patent CN02104195.4, analyzed using coal petrography and carry out coal-blending coking
Method, it is characterized in that, it is that the single grade coal for participating in coal blending is equipped with inert material simulation coking, draws the single grade coal in different inert thing
Intensity index a during contentIt is singleMost preferably living with the single grade coal and inert material lazy compares bIt is single, according to aIt is singleAnd bIt is singleCalculate intensity index SI ＇
With Compositional balance index CBI ＇, and iso-intensity curve is made.Using when, as long as the active component for measuring each single grade coal in coal blending contains
Amount, so that it may to calculate SI ＇ and CBI the ＇ values of coal blending, deduce the intensity of coke.The Blending of Coal Petrography coking test side of the patent
Method simplification on the basis of A Mosuofu and Shi Piluofa is got.Such as patent CN201210314984.1, one kind is suitable for
The Blending of Coal Petrography method of tamping coking, further：It is lazy maximum average more anti-than A/I, vitrinite according to the work of coking single grade coal
Penetrate rate and random reflec tance of vitrinite Re distribution proportions are matched, it is desirable to which meet that the work of the mixed coal after mixture is lazy is than A/I
2.0~2.5, vitrinite's maximum average reflectance of mixed coal is 1.00~1.40% and the random reflec tance of vitrinite of mixed coal
Re distribution histograms are continuous.
There are following 2 points deficiencies for several coke making and coal blending methods above.One is method is cumbersome, to measurement result accuracy
It is more demanding；The second is being difficult to realize in actual coal blending production, practicality is not strong.
In conclusion following technical problem exists in the prior art：High quality smelting will be produced under coke making process by coalingging on top
Golden Jiao need to improve rich coal and coking coal ratio, and rich coal and coking coal are there are mixed coal phenomenon sometimes in actual production, and different batches
Carry out coal its mixed coal degree difference, if only by controlling rich coal and coking coal ratio, it is difficult to the problem of ensureing quality of metallurgical coke, sometimes
Rich coal and coking coal allocation ratio can be caused excessive, add coal blending cost.
The content of the invention
It is an object of the invention to provide a kind of method using coal petrography index production metallurgical coke, by controlling mixed coal
Coal petrography index and its common process index, make rich coal and coking coal control in proper ratio scope, the base for coke making process of coalingging on top
On plinth, the coke making and coal blending method for maintaining high-strength metallurgical Jiao is realized.Solve coal petrology theoretical direction coal-blending coking in production
It is difficult to operate, it is impossible to play the problem of coal petrology instructs coal-blending coking advantage.Concrete technical scheme is as follows：
A kind of method using coal petrography index production metallurgical coke, includes the following steps：
(1) set and control the conventional index of mixed coal；
(2) set and control the coal petrography index of mixed coal；
(3) the coal petrography index and its conventional index of mixed coal are controlled, rich coal and coking coal is controlled in proper ratio scope.
Further, conventional index described in step (1) includes coordinating pit ash, sulphur content, volatile matter index Vdaf, stick
Knot property index caking index G, and/or maximum thickness of colloidal matter layer Y.
Further, the coal petrography index of mixed coal described in step (1) refers to that the vitrinite of mixed coal is averaged maximum reflection
Rate RmaxBetween 0.9~1.5%.
Further, VdafControl is not more than 30%.
Further, G controls are not less than 80.
Further, Y controls are not less than 16mm.
Further, production metallurgy is burnt is coaling coke making process using top.
Further, mixed coal includes following components, 1/3 coking coal or bottle coal (22~30) by weight percentage：Gas rich coal
(8~15)：Rich coal (10~23)：Coking coal (35~44)：Lean coal (5~10).
Further, mixed coal fineness：Below as-fired coal fineness 3mm accounts for 80% or so.
Further, moisture content of coal is coordinated：It is 10-11% by weight percentage.
Compared with currently available technology, present invention coke making process (commonly used, common) offer of coalingging on top is a kind of
By controlling the coal petrography index and technic index of coking mixed coal, production meets the high quality metallurgical coke of big volume blast furnace needs
Method.High coke strenth refers to coke crushing strength M40More than 85%, wear-resistant strength M10Less than 6%, coke reactivity CRI is small
In 26%, post reaction strength of coke CSR is more than 65% coke, is fully able to meet 2500m3And above blast furnace process needs.
Specifically：
1st, coke making process route of coalingging is pushed up using existing, technique is simple, and need not increase pre-processing device, it is easier to should
With；
2nd, overcome tradition and push up the problem of technique raising gas rich coal allocation ratio of coalingging makes coke strenth decline to a great extent, pass through
Control volatile matter index Vdaf, caking index G, maximum thickness of colloidal matter layer Y and vitrinite be averaged maximum reflectivity Rmax(0.9~
1.5%) distribution, realizes the purpose of production high-strength metallurgical Jiao；
3rd, rich coal, coking coal allocation ratio are reduced up to 5~10%, reduces high-quality caking coal resource consumption；
4th, the reduction of coal-blending coking cost is conducive to.
5th, using the method gas rich coal allocation ratio up to 18%, hot strength of coke CSR has reached more than 65%, meets
2500m3The needs of above blast furnace ironmaking.
Embodiment
The present invention will be described in detail below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
By controlling the coal petrography index and its common process index of mixed coal, rich coal and coking coal is set to control in proper ratio model
Enclose, on the basis of coke making process of coalingging on top, realize the coke making and coal blending method for maintaining high-strength metallurgical Jiao.Referred herein is normal
Rule index refers mainly to coordinate pit ash, sulphur content, volatile matter and cohesiveness index etc., and the coal petrography index of mixed coal refers to mixed coal mirror
Distributed area (the R of matter group maximum reflectivity valuemaxBetween 0.9~1.5%) scope.Here the volatile matter index of mixed coal is selected
Vdaf, cohesiveness index caking index G and maximum thickness of colloidal matter layer Y, the coal petrography index of mixed coal control cooperation coal quality.Wave
Hair divides index VdafIt is V an important factor for influencing coking power and metallurgical coke lumpinessdafControl is not more than 30%.Caking index G is characterized
The ability for cohering itself and inert material of coking coal, G controls are not less than 80, the coking of maximum thickness of colloidal matter layer Y characterizations coking coal
During produce gel quantity, Y control is not less than 16mm.The two indexs of G and Y can reflect the bonding of mixed coal well
Property.The coal petrography index of mixed coal refers to that the vitrinite of mixed coal is averaged maximum reflectivity RmaxIn 0.9~1.5% distribution
Proportion, is a comprehensive index, due to the vitrinite of coking coal and rich coal be averaged maximum reflectivity distribution be mostly in
The scope, ensures that the scope proportion causes mixed coal to have certain caking property and coking capacity, the scope control is left 50%
It is right.
Coal Blending Schemes：
The various allocation ratios of mixed coal (by weight percentage), 1/3 coking coal or bottle coal (22~30)：Gas rich coal (8~15)：
Rich coal (10~23)：Coking coal (35~44)：Lean coal (5~10)；Coal blending accuracy more than 98.5%；Mixed coal fineness：As-fired coal
Below fineness 3mm accounts for 80% or so；Coordinate moisture content of coal：It is 10-11% by weight percentage.
Using 6m coking by coke oven, coking time 20h, Dry Quenching.The coking coal used has six major classes, i.e. bottle coal, 1/3 Jiao
Coal, gas rich coal, rich coal, coking coal and lean coal.
Total quality analysis is carried out respectively to coking coal first；Secondly match somebody with somebody to these coals are set 13 kinds by different proportion
Coal scheme, each 1/3 coking coal of Scheme Choice or bottle coal 22~30%, gas rich coal 8~15%, rich coal 10~23%, coking coal 35~
44% and lean coal be 5~10%, obtain 13 Coal Blending Schemes；Ensure ash content Ad8.8~9.4%, sulphur content St,d0.71~
0.94%, dry ash free basis volatile matter Vdaf29~30%, for caking index G more than 80, mixed coal vitrinite is maximum average anti-
Penetrate rate RmaxThe control of (0.9~1.5%) distribution refines coke quality M 50% or so40Value is positively retained at 89 or so, M10
Value is between 5.2~5.6, and CRI values are between 22~24, CSR values are between 68~70.As shown in Table 1.
One coke making and coal blending of table and coke quality tables of data
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above,
As long as employing the various improvement of inventive concept and technical scheme of the present invention progress, or not improved directly apply to other fields
Close, within protection scope of the present invention.
Claims (1)
- A kind of 1. method using coal petrography index production metallurgical coke, it is characterised in that include the following steps：(1) set and control the conventional index of mixed coal, wherein, volatile matter index Vdaf controls are 29 ~ 30%, cohesiveness index Caking index G is controlled more than 80；(2) set and control the coal petrography index of mixed coal, points of the mixed coal maximum reflectance of vitrinite Rmax 0.9~1.5% Cloth scope control is 50%；(3) the coal petrography index and its conventional index of mixed coal are controlled, rich coal and coking coal is controlled in proper ratio scope, mixed coal Include following components by weight percentage：Bottle coal 22~30%：Gas rich coal 8~15%：Rich coal 10~23%：Coking coal 35~44%：It is thin Coal 5~10%；Mixed coal fineness：Below as-fired coal fineness 3mm accounts for 80%；Coordinate moisture content of coal：It is 10-11% by weight percentage；Using 6m coking by coke oven, coking time 20h, Dry Quenching；Ensure ash content Ad 8.8~9.4%, sulphur content St, d is 0.71~0.94%；Refined coke quality M40 values are positively retained at 89, M10 values between 5.2~5.6, and CRI values are between 22~24, CSR values exist Between 68~70.
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Citations (2)
| 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 |
| CN101942315A (en) * | 2010-08-16 | 2011-01-12 | 中国神华能源股份有限公司 | High-proportion coal blending and coking method |
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| JPS54156006A (en) * | 1978-05-31 | 1979-12-08 | Nippon Kokan Kk <Nkk> | Production of metallurgical coke having improved hot strength |
| JPH04268393A (en) * | 1991-02-25 | 1992-09-24 | Nkk Corp | Manufacture of coke |
| CN101358135B (en) * | 2007-07-31 | 2012-01-11 | 上海梅山钢铁股份有限公司 | Coking coal blending method for producing high-heat strength coke |
| CN102585868A (en) * | 2012-02-13 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Coking coal blending method |
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Patent Citations (2)
| 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 |
| CN101942315A (en) * | 2010-08-16 | 2011-01-12 | 中国神华能源股份有限公司 | High-proportion coal blending and coking method |
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