CN104312608A - Coal blending method of high-metamorphic coking coal for coal coking based on coke optical tissue structure - Google Patents
Coal blending method of high-metamorphic coking coal for coal coking based on coke optical tissue structure Download PDFInfo
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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 invention discloses a coal blending method of high-metamorphic coking coal for coal coking based on a coke optical tissue structure. The coal blending method comprises the following steps: 1) measuring the coking coal optical tissue structures of high-metamorphic coking coal and other single coking coal, counting the ratio of a rough grain embedding structure in the complex coal, a rough grain embedding structure with the optical isochrome area size of 7-10mu m, the sum of a medium grain embedding structure and an incomplete fiber structure, the sum of silk carbon and a fragment structure to the sum of complete fiber and a sheet structure; 2) confirming the coal blending ratio of single coal, and ensuring the ratio of the rough grain embedding structure in the complex coal, the rough grain embedding structure with the optical isochrome area size of 7-10mu m, the sum of the medium grain embedding structure and the incomplete fiber structure, the sum of silk carbon and the fragment structure to the sum of complete fiber and the sheet structure in the complex coal. According to the coal blending method, the indexes of the complex coal are selected to blend coal, the high-quality coke can be smelted even when the Y value and the Golgi maximum flow degree of the complex coal are less than a relatively level, and thus the high-quality coal resource with good flowability can be reduced.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of height based on charred coal organization structure coking coal that goes bad and participate in the blending method of coking.
Background technology
The fugitive constituent V of conventional coking coal in coking coal
dafbetween 18 ~ 28%, the average maximum reflectivity of vitrinite
between 1.15 ~ 1.50%.Wherein
coking coal between 1.35 ~ 1.50% is called high rotten coking coal, this kind of height goes bad coking coal caking index G value generally between 75 ~ 90, plastometer indice Y value is generally between 14 ~ 20mm, Gu-softening temperature is interval general between 50 ~ 75 DEG C, Ji Shi maximum fluidity is between 10 ~ 500ddpm, turgidity b value is between 10% ~ 50%, and coarse grain inlays component concentration between 38 ~ 78%.Blending method traditionally, the Y value of mixed coal needs to reach more than 15mm, and Ji Shi maximum fluidity reaches more than 300ddpm, just can produce high grade coke.
But contriver finds in Coking Test for Blend and production application practice:
australian Sa Aji ore deposit coking coal between 1.35 ~ 1.50%, Shanxi Jinzhong area and Luliang Prefecture's part coking coal, a certain proportion of above-mentioned coking coal participates in coal-blending coking, mixed coal Y value is only between 12mm ~ 15mm, the low value scope of Ji Shi maximum fluidity between 60ddpm ~ 300ddpm, refines hot strength of coke CSR also reaches more than 65%.Therefore conventionally to such high rotten coking coal, transition will consume that plastic mass is enriched, the high-quality caking coal resource of good flowing properties, cause the wasting of resources, increase enterprise's production cost.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of height based on charred coal organization structure go bad coking coal participate in coke making and coal blending method, mixed coal Y value of avoiding coveting reaches more than 15mm, Mei Jishi maximum fluidity is coordinated to reach more than 300ddpm, plastic mass is enriched, the phenomenon of the high-quality caking coal resource of good flowing properties to cause transition to consume, avoid the wasting of resources, increase the performance of enterprises.
For solving the problems of the technologies described above, the blending method designed by the present invention comprises the steps:
1) each single grade coal coking charred coal organization structure of high rotten coking coal, other participation coal-blending cokings is measured, the ratio of coarse grain pattern structure in statistics mixed coal, the coarse grain pattern structure of optics isochrome district size 7 ~ 10um, middle grain pattern structure and incomplete fibrous texture sum, silk carbon and fragmentation structure sum, complete fiber and sheet structure sum, the described height coking coal that goes bad is
between 1.35 ~ 1.50%, G value is between 75 ~ 90, Gu-softening temperature is interval between 50 ~ 75 DEG C, turgidity b value is between 10% ~ 50%, and coarse grain inlays the coking coal of component concentration between 38 ~ 78%;
2) one group of Coal Blending Schemes is drafted according to following ranges: high rotten coking coal allocation ratio 15 ~ 45%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 5 ~ 35%, lean coal allocation ratio 3 ~ 10%; Described middle iso-metamorphism coking coal is the average maximum reflectivity of vitrinite
coking coal between 1.15 ~ 1.35%;
3) test to the Coal Blending Schemes drafted, inspecting standard is for meet following condition simultaneously: coarse grain pattern structure >=20% in mixed coal, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=7%; Silk carbon and fragmentation structure sum are 25 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%;
4) if draft Coal Blending Schemes not reach inspecting standard, then Coal Blending Schemes is adjusted, inflation method: any or which kind optical texture does not meet the demands, then higher or lower to this optical texture coal allocation ratio adjusts, until meet the inspecting standard of Coal Blending Schemes, complete the formulation of Coal Blending Schemes.
Further, described height goes bad the Y value of coking coal between 14mm ~ 20mm, and the Y value of mixed coal is between 12mm ~ 15mm, and Ji Shi maximum fluidity is between 10 ~ 500ddpm.
Further, the large Giseeler fluidity of described mixed coal is between 10 ~ 240ddpm.
Further, described step 2) in, high rotten coking coal allocation ratio 15 ~ 23%, bottle coal allocation ratio 10 ~ 25%, 1/3 coking coal allocation ratio 15 ~ 25%, rich coal allocation ratio 13 ~ 18%, middle iso-metamorphism coking coal allocation ratio 20 ~ 30%, lean coal allocation ratio 5 ~ 8%.
Further, described step 3) in, inspecting standard is: coarse grain pattern structure >=21% in mixed coal, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=9%; Silk carbon and fragmentation structure sum are 28 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%.
The present invention selects to limit following index: the reason that coarse grain pattern structure in mixed coal, the coarse grain pattern structure of optics isochrome district size 7 ~ 10um, middle grain pattern structure and incomplete fibrous texture sum, silk carbon and fragmentation structure sum, completely fiber and sheet structure sum carry out coal blending is: when there being the high coking coal that goes bad to participate in coal-blending coking, the coarse grain pattern structure STRENGTH ON COKE cold and hot state strength support effect of optics isochrome district size 7 ~ 10um that active ingredient coking is transformed is strong, therefore, one of mixed coal is it can be used as to limit index; Coarse grain pattern structure, middle grain pattern structure and not exclusively fibrous texture all support hot strength of coke, therefore, coarse grain pattern structure, middle grain pattern structure and incomplete fibrous texture sum in mixed coal are limited index as another two of mixed coal; Complete fiber and the equal deteriorated coke quality of sheet structure, must be limited; Silk carbon and fragmentation structure be coking center, but with other structure bonding interface existing defects, therefore, silk carbon and fragmentation structural content sum should control in suitable scope.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
There are 7 kinds of coking coal resources in certain factory, wherein 2 kinds
height between 1.35 ~ 1.50% goes bad coking coal, is numbered A ore deposit, B ore deposit respectively; The height in these two kinds of ore deposits goes bad coking coal G value between 75 ~ 90, and turgidity b value is between 10% ~ 50%, and coarse grain inlays component concentration between 38 ~ 78%.Other coals 5 ore deposit points, are numbered E ore deposit (bottle coal), F ore deposit (rich coal), G ore deposit (1/3 coking coal), H ore deposit (middle iso-metamorphism coking coal), I ore deposit (lean coal) respectively; Determine each single grade coal coking charred coal organization structure respectively, the coarse grain pattern structure of optics isochrome district size 7 ~ 10um is added up.
Coal Blending Schemes is drafted: high rotten coking coal allocation ratio 15 ~ 45% according to following ranges, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 5 ~ 35%, lean coal allocation ratio 3 ~ 10%;
Test to the Coal Blending Schemes drafted, inspecting standard is: in mixed coal, coarse grain pattern structure >=20%, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=7%; Silk carbon and fragmentation structure sum are 25 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%;
If draft Coal Blending Schemes not reach inspecting standard, then Coal Blending Schemes is adjusted, inflation method: any or which kind optical texture does not meet the demands, then higher or lower to this optical texture coal allocation ratio adjusts, until meet the inspecting standard of Coal Blending Schemes.
Each single grade coal coking charred coal organization structural content the results are shown in Table 1, carries out the specific embodiment of coke making and coal blending in table 2 according to the inventive method.
The each single grade coal reflectivity of table 1, coking optical texture index
Wherein, Gu softening temperature is interval: 51 DEG C, A ore deposit, 73 DEG C, B ore deposit; Ji Shi maximum fluidity A ore deposit 19ddpm, B ore deposit 326ddpm.
The Coal Blending Schemes of table 2 embodiment 1 ~ 4,1-1,4-1
Blending ratio adjusts as follows:
In embodiment 1-1, although each coal blend ratio meets area requirement, in mixed coal, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um is lower than 7%, and hot strength of coke CSR is less than 65%.Because in A ore deposit, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um is the highest, its proportioning is increased to 20% by 15%, the corresponding reduction by 5% of G ore deposit proportioning, see embodiment 1, in mixed coal, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um brings up to 8.29% by 6.54%, complete the adjustment of Coal Blending Schemes, hot strength of coke CSR brings up to 66.63% by 64.35%.
In embodiment 4-1, although each coal blend ratio meets area requirement, in mixed coal, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um is lower than 7%, and coarse grain is inlayed content and is less than 20%, and hot strength of coke CSR is less than 65%.Because in B ore deposit, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um is higher, its proportioning is increased to 30% by 20%, the corresponding reduction by 10% of G ore deposit proportioning, see embodiment 4, in mixed coal, the coarse grain pattern structure content of optics isochrome district size 7 ~ 10um brings up to 8.43% by 5.93%, complete the adjustment of Coal Blending Schemes, hot strength of coke CSR brings up to 67.12% by 64.06%.
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, adopt the inventive method gained hot strength of coke CSR 65 ~ 70%, M40 is 87 ~ 89%, M10 is 5.5 ~ 6%, and comparatively prior art reduces coal blending cost about 4,000,000 yuan/month.
According to existing blending method, in order to ensure that mixed coal Y value reaches more than 15mm, coordinating Mei Jishi maximum fluidity to reach more than 300ddpm, weakly caking bottle coal, lean coal consumption need be reduced, increasing by 1/3 coking coal of plastic mass relative abundance, coking coal and rich coal consumption.
The Coal Blending Schemes of comparative example 1,2,3,4 is in table 3.
The cold and hot state intensity of comparative example 1,2,3,4 coking charcoals is in table 4.
As can be seen from table 3 and table 4 column data, comparative example 1,2,3,4 is compared with embodiment 1,2,3,4, and coke quality is in peer-level, and mixed coal cost is high 5.54 yuan/ton respectively, affects Business Economic Benefit.
The Coal Blending Schemes of table 3 comparative example 1,2,3,4
Table 4 comparative example 1,2,3,4 coking charcoal cold and hot state intensity
| Embodiment | M25/％ | M10/％ | CRI/％ | CSR/％ |
| Comparative example 1 | 88.78 | 9.25 | 20.02 | 66.71 |
| Comparative example 2 | 90.33 | 8.53 | 18.77 | 68.64 |
| Comparative example 3 | 89.57 | 9.38 | 19.15 | 66.52 |
| Comparative example 4 | 90.29 | 9.13 | 19.76 | 67.34 |
Claims (6)
1. to go bad the coke making and coal blending method that coking coal participates in based on the height of charred coal organization structure, it is characterized in that: this blending method comprises the steps:
1) each single grade coal coking charred coal organization structure of high rotten coking coal, other participation coal-blending cokings is measured, the ratio of coarse grain pattern structure in statistics mixed coal, the coarse grain pattern structure of optics isochrome district size 7 ~ 10um, middle grain pattern structure and incomplete fibrous texture sum, silk carbon and fragmentation structure sum, complete fiber and sheet structure sum, the described height coking coal that goes bad is
between 1.35 ~ 1.50%, G value is between 75 ~ 90, Gu-softening temperature is interval between 50 ~ 75 DEG C, turgidity b value is between 10% ~ 50%, and coarse grain inlays the coking coal of component concentration between 38 ~ 78%;
2) coal blending is carried out according to following Coal Blending Schemes: high rotten coking coal allocation ratio 15 ~ 45%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 5 ~ 35%, lean coal allocation ratio 3 ~ 10%; Described middle iso-metamorphism coking coal is the average maximum reflectivity of vitrinite
coking coal between 1.15 ~ 1.35%;
And meet: in mixed coal, coarse grain pattern structure >=20%, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=7%; Silk carbon and fragmentation structure sum are 25 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%.
2. the height based on charred coal organization structure according to claim 1 go bad coking coal participate in coke making and coal blending method, it is characterized in that: described height goes bad the Y value of coking coal between 14mm ~ 20mm, the Y value of mixed coal is between 12mm ~ 15mm, and Ji Shi maximum fluidity is between 10 ~ 500ddpm.
3. the height based on charred coal organization structure according to claim 1 and 2 go bad coking coal participate in coke making and coal blending method, it is characterized in that: the Ji Shi maximum fluidity of described mixed coal is between 10 ~ 240ddpm.
4. the height based on charred coal organization structure according to claim 1 and 2 go bad coking coal participate in coke making and coal blending method, it is characterized in that: described step 2) in, high rotten coking coal allocation ratio 15 ~ 23%, bottle coal allocation ratio 10 ~ 25%, 1/3 coking coal allocation ratio 15 ~ 25%, rich coal allocation ratio 13 ~ 18%, middle iso-metamorphism coking coal allocation ratio 20 ~ 30%, lean coal allocation ratio 5 ~ 8%.
5. the height based on charred coal organization structure according to claim 1 and 2 go bad coking coal participate in coke making and coal blending method, it is characterized in that: described step 2) in, coarse grain pattern structure >=21% in mixed coal, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=9%; Silk carbon and fragmentation structure sum are 28 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%.
6. the height based on charred coal organization structure according to claim 3 go bad coking coal participate in coke making and coal blending method, it is characterized in that: described step 2) in, coarse grain pattern structure >=21% in mixed coal, and coarse grain pattern structure >=7% of optics isochrome district size 7 ~ 10um; Middle grain pattern structure and incomplete fibrous texture sum >=9%; Silk carbon and fragmentation structure sum are 28 ~ 35%; Complete fiber and sheet structure sum are 3 ~ 8%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104655818A (en) * | 2015-02-13 | 2015-05-27 | 武汉钢铁(集团)公司 | Prediction method of crushing strength of coke for coal blending coking |
| CN104745217A (en) * | 2015-04-01 | 2015-07-01 | 武汉钢铁(集团)公司 | Blending method of high-metamorphous coking coal |
| CN105062532A (en) * | 2015-09-02 | 2015-11-18 | 武汉钢铁(集团)公司 | Coal blending method for controlling coke quality |
| CN110746997A (en) * | 2019-10-29 | 2020-02-04 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111029576A (en) * | 2019-11-12 | 2020-04-17 | 山西沁新能源集团股份有限公司 | Method for blending crystalline carbon precursor |
| CN113621393A (en) * | 2021-07-21 | 2021-11-09 | 武汉钢铁有限公司 | Classification matching method for coking coal with volatile content of 18-22% |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104655818A (en) * | 2015-02-13 | 2015-05-27 | 武汉钢铁(集团)公司 | Prediction method of crushing strength of coke for coal blending coking |
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| CN104745217A (en) * | 2015-04-01 | 2015-07-01 | 武汉钢铁(集团)公司 | Blending method of high-metamorphous coking coal |
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| CN111029576A (en) * | 2019-11-12 | 2020-04-17 | 山西沁新能源集团股份有限公司 | Method for blending crystalline carbon precursor |
| CN111029576B (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 carbon precursor coal |
| CN113621393A (en) * | 2021-07-21 | 2021-11-09 | 武汉钢铁有限公司 | Classification matching method for coking coal with volatile content of 18-22% |
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Effective date of registration: 20170727 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. |