CN111117669B - Method for distinguishing classification of coking coal types and application thereof - Google Patents
Method for distinguishing classification of coking coal types and application thereof Download PDFInfo
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- CN111117669B CN111117669B CN202010012214.6A CN202010012214A CN111117669B CN 111117669 B CN111117669 B CN 111117669B CN 202010012214 A CN202010012214 A CN 202010012214A CN 111117669 B CN111117669 B CN 111117669B
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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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/557—Detecting specular reflective parts on sample
Abstract
The invention discloses a method for judging the classification of coking coal types, which comprises the following steps: s1, detecting to-be-detected coking according to national detection standardV of coaldafG and
Description
Technical Field
The invention relates to the technical field of coking and coal blending, in particular to a method for judging classification of coking coal and application thereof.
Background
In the coke oven smelting, in order to effectively execute the operation concept of 'four-component raw material and three-component operation', the raw material of coking coal is well managed and used as an important technical measure for improving the quality and the efficiency of enterprises. In a 200Kg coke oven series experiment organizing Standda inlet coal, the applicant finds that the coking performance of the coke oven is inconsistent with the classification standard of the coking coal of the coal type, finds that the coking coal has the coking performance of the coking coal and the gas fat coal at the same time, and obtains evidence in the practice of cloud coal energy, the coking performance of the coke oven is between that of the coking coal and the gas fat coal, and the coking coal has an unobvious characteristic. The query of a self-produced coke database shows that the dominant coal types such as 'Yilang, Panjiang' and the like used historically by cloud coal energy companies all have the characteristic of 'inconsistent surface and interior', are similar to Fukan gas coal which substitutes Dawukou coke coal in China and Evereil coke coal which cannot play the role of coke coal, and have the characteristic of 'inconsistent surface and interior', and due to the existence of coal with the characteristic, when coal blending and coking are carried out in coke oven smelting, if coal blending is carried out according to the classified result, an accurate coal blending result cannot be obtained, the quality fluctuation of coke obtained after coal blending is large, the coking performance fluctuation is large, so that the negative influence is generated on blast furnace production, and the difficulty in coke quality control in production practice is increased.
Disclosure of Invention
The invention aims to: aiming at the existing problems, through long-time series research, the applicant defines the coal with the characteristic of inconsistent surface and interior in the coking process as amphoteric coal, finds the coal quality commonalities of the coal, provides a method for distinguishing the types of coking coal, comprehensively masters the coking performance of the amphoteric coal and the special function of the amphoteric coal in coal blending coking, provides technical route guidance for a production department to implement accurate coal blending, improves the coke quality, reduces the negative influence of large fluctuation of the coke quality on the blast furnace production, provides good cost performance purchasing guidance for a purchasing department, and realizes the quality improvement and cost reduction of enterprises.
The technical scheme adopted by the invention is as follows: a method for discriminating coking coal type classification is characterized by comprising the following steps:
s1, detecting the V of the coking coal to be detected according to the national detection standarddafValue, G value and
a value;
s2, according to the Chinese standard coal classification method and the coal rock index classification method, obtaining V according to detectiondafValue, G value and
respectively judging the types of the coking coals to be detected;
s3, when the judgment result of the Chinese standard coal classification method is consistent with the judgment result of the coal rock index classification method, classifying according to the existing classification method, otherwise, when the judgment result is inconsistent, detecting the vitrinite reflectivity of the coking coal to be detected and obtaining a reflectivity distribution map, in the reflectivity distribution map, if the sum of the proportions of two adjacent types of coking coal is more than 80 percent and the proportion of a single coal is not less than 30 percent, calling the coking coal to be detected as amphoteric coal and judging as the amphoteric coal;
and S4, when the coking coal to be detected is judged to be the amphoteric coal, naming the amphoteric coal for the second time by taking the judgment result of the Chinese standard coal classification method as a subject and the judgment result of the coal rock index classification method as a fixed language, and mainly giving the coking performance of the amphoteric coal to the judgment result of the coal rock index classification method.
In the above invention, VdafThe values represent dry ashless base volatiles values in coal assay specifications, the G values represent the caking index of coal,
the value represents the maximum average reflectance of coal, and if the determination results are not consistent, and if the sum of the proportions of two adjacent types of coking coal is not more than 80% in the obtained reflectance distribution diagram, the coal blending is indicated, and the coal blending is not suitable for the discrimination of the amphoteric coal. According to the above-mentioned discrimination method, not only can such special coking coals with "exterior-interior inconsistency" be identified, but also the classification can be defined, for example, a certain coking coal is judged as coking coal by the Chinese standard coal classification method and is subjected to the coal petrography index
Classification method determinationThe coking coal is fat coal, the vitrinite reflectance of the coking coal is detected, the sum of the proportions of two adjacent types of coking coal is more than 80 percent, and the proportion of a single coal is not less than 30 percent, the coking coal is judged to be amphoteric coal, and the name is as follows: the coking coal amphoteric coal with fat coal as a main component determines the coking performance of the coking coal, provides technical route guidance for a production department to implement accurate coal blending during coal blending coking, improves the coal blending accuracy, reduces the fluctuation range of the coke quality obtained by final coal blending, improves the coke quality stability, and can also guide a purchasing department to provide good cost performance purchasing guidance according to the classification judgment method, thereby realizing the quality improvement and cost reduction of enterprises.
Further, for more accurate judgment, the Chinese standard coal classification method is executed according to the Chinese coal classification standard GB/T5751-2009.
Further, the invention also comprises a method for quantitatively confirming the coking coal to be detected, wherein the method for quantitatively confirming comprises the following steps:
1) carrying out a 200kg coke oven coking test on the coking coal to be detected;
2) cold crushing strength M for 200kg coke oven coke sample40Detecting;
3) detecting the intensity CSR of a coke sample of 200kg of the coke oven after the thermal state reaction;
4) combining the detection data of the steps 2) and 3) and simultaneously combining the V of the coking coal to be detecteddafValue, G value and
the results of quantitative confirmation of coking performance of the amphoteric coal were obtained.
In the above method, V is first combineddafThe values and G values were classified according to the Chinese Standard coal classification method and then according to the classification standards of Table 1, according to M40Judging whether there is coal blending according to the CSR value and the value, for example, judging a certain coking coal as coking coal according to the Chinese standard coal classification method, and obtaining M of the coking coal through test detection40Value and CSR value, then if M is40If the value and CSR value are in the range of coking coal I or coking coal II, the refining is judgedThe coking coal is "amphoteric coal", and no coal blending is present, otherwise, coal blending is present, and cannot be discriminated by the above-mentioned discrimination method.
TABLE 1 coking coal classification method
Further, the main component of the "amphoteric coal" is judged from the reflectance distribution, and for example, if the coking coal is judged to be "amphoteric coal", the reflectance distribution of the coking coal is judged to be
When the ratio of the value of 0.9-1.2 reaches 60%, it is judged that the coking coal contains fat coal as a main component, and if the ratio is not less than 60%, the coking coal is treated as a main component
When the ratio of the value of 0.6 to 0.8 reaches 60%, the coking coal is judged to be mainly composed of gas coal, thereby realizing quantitative confirmation of the coking coal to be detected.
Further, in the step 1), the 200kg coke oven coking test specifically comprises: and (3) charging 280kg of 240-280kg coking coal containing 10% of water into a 200kg test coke oven, and performing dry distillation for 15-18h at the temperature of 1010-1050 ℃ to obtain coke. The test dosage of the coking coal is selected according to actual conditions, and can be 240kg, 250kg, 260kg, 280kg and the like, and the temperature condition can be 1010 ℃, 1020 ℃, 1050 ℃ and the like.
Further, in step 2), M40The detection method of (3) is performed according to the method specified in the GB/T2006-2008 standard, and in step 3), the detection method of CSR is performed according to the method specified in the GB/T4000-2008 standard.
The invention further comprises an application of the distinguishing method for classifying the coking coal types, namely the distinguishing method is applied to the proportioning calculation of the coking coal in the coal blending and coking process, provides technical route guidance for implementing accurate coal blending for a production department, improves the coal blending accuracy, provides good cost performance purchasing guidance for a purchasing department, and realizes the quality improvement and cost reduction of enterprises.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the invention provides a method for distinguishing and classifying coking coal types and application thereof, and the method is used for distinguishing and classifying the coking coal with inconsistent surface and inside, so that the problems of GB/T5751-2009 classification method and vitrinite reflectance of coal petrography indexes are solved
The classification results are inconsistent, the coking characteristics of coking coal are accurately positioned through the definition of the amphoteric coal, so that the coking performance of the amphoteric coal and the special function of the amphoteric coal in coal blending coking are comprehensively mastered, technical route guidance is provided for a production department to implement accurate coal blending, the coke quality is improved, the negative influence of large fluctuation of the coke quality on blast furnace production is reduced, good cost performance purchasing guidance is provided for a purchasing department, and the quality improvement and cost reduction of enterprises are realized.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A method for judging the classification of coking coal types comprises the following steps:
s1, detecting the process indexes of the 'one wave' coking coal, comprising the following steps: vdaf25.69%, G value 95, and maximum average reflectance
1.198, its reflectance distribution 0.9-1.2 60.15%, 1.2-1.5 33.30%;
s2, putting 260kg of coking coal containing 10% of water into a 200kg test coke oven, and carrying out dry distillation for 16.5h under the heating conditions of 1010 and 1050 ℃ to obtain 199kg of coke;
s3, detecting the cold crushing strength M of a 200kg coke oven coke sample according to the method specified in GB/T2006-2008 standard40The content was found to be 83.5%.
S4, detecting the intensity CSR of the coke sample of the 200kg coke oven after the thermal state reaction to be 51.16 percent according to the method specified by GB/T4000-2008 standard;
s5, judging according to the appearance to obtain a coke with a large lumpiness, good melting and coking performance similar to that of fat coal;
s6, obtaining the coal by an amphoteric coal judgment method, judging that the coal is amphoteric coal by judging that the sum of the proportions of two adjacent coking coals is more than 80 percent and the proportion of a single coal is not less than 30 percent, and obtaining the coal by judging according to the parameters, wherein the coal is the coking coal amphoteric coal taking fat coal as a main component (GB/T5751-2009, national standard is coking coal, and coal petrology index vitrinite reflectance is shown in detail in the specification
The classification result is rich coal).
Example 2
A method for judging the classification of coking coal types comprises the following steps:
s1, detecting the technological indexes of the 'Standad' coking coal, including: vdaf22.93%, G value 89, and maximum average reflectance
1.024, with a reflectance distribution of 55.60% from 0.9 to 1.2 and 30.01% from 1.2 to 1.5;
s2, charging 261kg of coking coal containing 10% of water into a 200kg test coke oven, and carrying out dry distillation for 16.5 hours under the heating conditions of 1050 ℃ and 1010 ℃ to obtain 198kg of coke;
s3, detecting the cold crushing strength M of a 200kg coke oven coke sample according to the method specified in GB/T2006-2008 standard4069.80%;
s4, detecting the intensity CSR of the coke sample of the 200kg coke oven after the thermal state reaction to be 55.73 percent according to the method specified by GB/T4000-2008 standard;
s5, judging according to the appearance to obtain a coke with small lumpiness, good melting and breaking performance and coking performance similar to that of gas-fat coal;
s6, obtaining the coal by an amphoteric coal judgment method, judging that the coal is amphoteric coal when the sum of the proportions of two adjacent coking coals is more than 80% and the proportion of a single coal is not less than 30%, and judging according to the parameters, wherein the coal is the coking coal amphoteric coal taking gas fat coal as a main component (GB/T5751-2009, national standard is coking coal, coal petrology index vitrinite reflectance is shown in detail in GB/T5751-2009)
The classification result is rich coal).
Example 3
A method for judging the classification of coking coal types comprises the following steps:
s1, detecting the process indexes of the Panjiang coking coal, comprising the following steps: vdaf32.29%, a G value of 86, and a maximum average reflectance
0.975, with a reflectance distribution of 38.30% from 0.8 to 0.9 and 43.9% from 0.9 to 1.2;
s2, charging 261kg of coking coal containing 10% of water into a 200kg test coke oven, and carrying out dry distillation for 16.5 hours under the heating conditions of 1050 ℃ and 1010 ℃ to obtain 197kg of coke;
s3, detecting the cold crushing strength M of a 200kg coke oven coke sample according to the method specified in GB/T2006-2008 standard4029.28%;
s4, detecting the intensity CSR of the coke sample of the 200kg coke oven after the thermal state reaction to be 73.13 percent according to the method specified by GB/T4000-2008 standard;
s5, judging according to the appearance that the coke has a strip-shaped lumpiness, good melting, compactness and brittleness and coking performance similar to that of fat coal;
s6, according to the method for judging amphoteric coal, the coal is 1/3 coking coal amphoteric coal (GB/T5751-2009 national standard is 1/3 coking coal) which takes fat coal as main component, and the vitrinite reflectance of coal petrography index is
The classification result is rich coal).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A method for discriminating coking coal type classification is characterized by comprising the following steps:
s1, detecting the V of the coking coal to be detected according to the national detection standarddafValue, G value and
a value;
s2, according to the Chinese standard coal classification method and the coal rock index classification method, obtaining V according to detectiondafValue, G value and
respectively judging the types of the coking coals to be detected;
s3, when the judgment result of the Chinese standard coal classification method is consistent with the judgment result of the coal rock index classification method, classifying according to the existing classification method, otherwise, when the judgment result is inconsistent, detecting the vitrinite reflectivity of the coking coal to be detected and obtaining a reflectivity distribution map, in the reflectivity distribution map, if the sum of the proportions of two adjacent types of coking coal is more than 80 percent and the proportion of a single coal is not less than 30 percent, calling the coking coal to be detected as amphoteric coal and judging as the amphoteric coal;
and S4, when the coking coal to be detected is judged to be the amphoteric coal, naming the amphoteric coal for the second time by taking the judgment result of the Chinese standard coal classification method as a subject and the judgment result of the coal rock index classification method as a fixed language, and mainly giving the coking performance of the amphoteric coal to the judgment result of the coal rock index classification method.
2. The method of discriminating a coking coal classification according to claim 1, wherein the chinese standard coal classification method is performed in accordance with the chinese coal classification standard GB/T5751-2009.
3. The method for discriminating coking coal type classification according to claim 1 further comprising a method for quantitatively confirming the coking coal to be examined, the method for quantitatively confirming comprising the steps of:
1) carrying out a 200kg coke oven coking test on the coking coal to be detected;
2) cold crushing strength M for 200kg coke oven coke sample40Detecting;
3) detecting the intensity CSR of a coke sample of 200kg of the coke oven after the thermal state reaction;
4) combining the detection data of the steps 2) and 3) and simultaneously combining the V of the coking coal to be detecteddafValue, G value and
the results of quantitative confirmation of coking performance of the amphoteric coal were obtained.
4. The method for discriminating the classification of coking coal according to claim 1, wherein in the step 1), the 200kg coke oven coking test is specifically: and (3) charging 280kg of 240-280kg coking coal containing 10% of water into a 200kg test coke oven, and performing dry distillation for 15-18h at the temperature of 1010-1050 ℃ to obtain coke.
5. The method of discriminating coking coal type classification according to claim 1 wherein in step 2), M40The detection method of (3) is performed according to the method specified in the GB/T2006-2008 standard, and in step 3), the detection method of CSR is performed according to the method specified in the GB/T4000-2008 standard.
6. Use of the method for discriminating the classification of coking coal according to any one of claims 1 to 5 for the proportioning calculation of coking coal in the coal blending and coking process.
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| CN113484282B (en) * | 2021-07-02 | 2023-04-28 | 西安建筑科技大学 | Identification method for poor lean coal, lean coal or anthracite doped in semi-coke powder |
| CN115368927A (en) * | 2022-09-02 | 2022-11-22 | 安阳钢铁股份有限公司 | Low-volatile coal blending coking method for top-mounted coke oven |
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| JP5737002B2 (en) * | 2011-06-24 | 2015-06-17 | 新日鐵住金株式会社 | Method for producing blended coal for coke oven charging |
| CN102690669B (en) * | 2012-05-23 | 2013-12-18 | 武汉钢铁(集团)公司 | Coking coal quality classification method and coal blending and coking method with participation of coking coal |
| CN103278610B (en) * | 2013-06-08 | 2015-05-20 | 武汉钢铁(集团)公司 | Method for evaluating coal quality of coking coal having largest Gieseler fluidity of 2000ddpm or less |
| CN103952166B (en) * | 2014-05-09 | 2015-09-16 | 武汉钢铁(集团)公司 | Based on ature of coal classification and the blending method of coking coal coking property |
| CN104449778B (en) * | 2014-10-24 | 2016-08-24 | 山西太钢不锈钢股份有限公司 | A kind of method that integrated use coal petrography index carries out the exploitation of coal source |
| CN105062531B (en) * | 2015-08-12 | 2018-04-06 | 中钢集团鞍山热能研究院有限公司 | Coking raw material application is classified and Quality evaluation and its instructs blending method |
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| CN105542821A (en) * | 2016-01-19 | 2016-05-04 | 张学梅 | Coking coal blending method |
| CN109294608A (en) * | 2018-12-13 | 2019-02-01 | 山东铁雄新沙能源有限公司 | A kind of coal quality classification method of coking coal and the coke making and coal blending method of participation |
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