CN102925185B - Blended coal expansibility regulating method - Google Patents
Blended coal expansibility regulating method Download PDFInfo
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- CN102925185B CN102925185B CN201210389629.0A CN201210389629A CN102925185B CN 102925185 B CN102925185 B CN 102925185B CN 201210389629 A CN201210389629 A CN 201210389629A CN 102925185 B CN102925185 B CN 102925185B
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Abstract
The invention discloses a blended coal expansibility regulating method. The method comprises the following steps of: selecting one or several coking coals with an Audibert-Arnu expansion index b more than 80% as blended coal expansibility regulating coals; selecting other single coking coals, determining the range of the ratio of other coking coals which influence the formation of the coke coarse grained mosaic texture of the blended coal and the blended coal fiber and flakey structure according to the type of blended coal expansibility regulating coals; regulating the ratio of blended coal expansibility regulating coals; regulating the Audibert-Arnu expansion index b of the blended coal to -5 to 15%; and finally determining the specific ratio of other single coking coals and regulating the rate of coke coarse grained mosaic texture of the blended coal to over 35% and the sum of the fiber and flakey structure less than 10%. The method can control the expandability of the blended coal reasonably, facilitate the reasonable use of coking coal resources, save high-quality coking coal and improve quality of coke.
Description
Technical field
The invention belongs to coal-blending coking technical field, be specifically related to the expansile control method of a kind of mixed coal.
Background technology
The swellability index of coking coal is general only as gas-fat coal, rich coal differentiation use, and usually used as the auxiliary characteristics of distinguishing strong sticky coal, people are not high to its attention rate.But in coking coal is used, often find, the impact of the swelling property Coke Quality of coking coal is larger, and it is too high or too low that the coking coal ratio that some turgiditys are larger is added the improper turgidity of mixed coal that just can make a little, thereby cause coke quality deteriorated.There is no at present clear and definite mixed coal swelling property control method both at home and abroad, impact on the swelling property of mixed coal and other performance index STRENGTH ON COKE thermal characteristics also lacks enough understanding, cause regulating the selection of the expansile coal of mixed coal and adapted amount thereof all to have blindness, not only cause coal blending quality unstable, also easily cause adapted to cross high-quality caking coal at high proportion, increase coal blending cost.
Summary of the invention
Technical problem to be solved by this invention is to provide the expansile control method of a kind of mixed coal, the method can rationally be determined the expansile coal of mixed coal and the adapted ratio of regulating, the turgidity of mixed coal is adjusted to OK range, so that mixed coal has good expansion character, mixed coal coking gained coke quality is high, 6 meters of above coke oven dry coke quenching CSR >=65%.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises the steps:
1) select to determine sub-turgidity b difficult to understand > single one or more of planting in coking coal of 80% regulate coal as mixed coal swelling property;
2) select to determine other single coking coal of planting, and according to described mixed coal swelling property, regulate the kind of coal, carry out respectively following 2.1), 2.2) step:
2.1) described mixed coal swelling property regulates coal containing the list of influential mixed coal coking coarse grain pattern structure, not plant coking coal, determine other the single proportional range of planting coking coal that affects mixed coal coking coarse grain pattern structure, guarantee the coking coarse grain pattern structure of mixed coal 35%; Then, carry out step 2.3);
2.2) described mixed coal swelling property regulates coal containing single coking coal of planting of influential mixed coal coking coarse grain pattern structure, determine other the single proportional range of planting coking coal that affects mixed coal coking coarse grain pattern structure, guarantee that the coking coarse grain pattern structure of mixed coal is 32 ~ 48%; Then, carry out step 2.3);
2.3) determine remaining other single proportional range of planting coking coal that affects mixed coal fiber and sheet structure, guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) according to described mixed coal swelling property, regulate the kind of coal, carry out respectively following 3.1), 3.2) step:
3.1) described mixed coal swelling property regulates coal containing the list of influential mixed coal coking coarse grain pattern structure, not plant coking coal, adjust the ratio that described mixed coal swelling property regulates coal, mixed coal sub-turgidity b difficult to understand is adjusted between-5～15%, then determines described other single ratio of planting coking coal;
3.2) described mixed coal swelling property regulates coal containing single coking coal of planting of influential mixed coal coking coarse grain pattern structure, adjust the ratio that described mixed coal swelling property regulates coal, mixed coal sub-turgidity b difficult to understand is adjusted between-5～15%, then determine described other single ratio of planting coking coal, make the coking coarse grain pattern structure of mixed coal 35%.
Further, in described step 1), mixed coal swelling property adjusting coal is one or both in rich coal and gas-fat coal.
Further, described step 2.1), 2.2) in, described other single coking coal of planting that affects mixed coal coking coarse grain pattern structure comprises coking coal.Further, described other single coking coal of planting that affects mixed coal coking coarse grain pattern structure also comprises 1/3 coking coal.
Further, described step 2.3) in, the described single kind coking coal that affects mixed coal fiber and sheet structure is one or both in lean coal and meager lean coal.
Further, described step 2) in, described other single coking coal of planting also comprises bottle coal.
The present invention is actual according to factory, first determine that mixed coal swelling property regulates coal, by mixed coal coking coarse grain pattern structure and fiber and sheet structure index, tentatively determine and affect mixed coal coking coarse grain pattern structure and affect mixed coal fiber and sheet structure other single adapted proportional range of planting coking coal afterwards, the sub-turgidity index of Austria of controlling mixed coal by adjustment mixed coal swelling property adjusting coal ratio again, so that mixed coal has good expansion character, is finally determined concrete ratio of other single kind coking coal.Adopt the inventive method to carry out coal blending, because the mixed coal swelling property such as gas-fat coal, rich coal regulate the turgidity of coal considerably beyond other single coking coal of planting, mixed coal turgidity is not affected by other single kind coking coal change within the scope of certain proportion substantially, can be in the situation that guaranteeing coarse grain pattern structure and fiber and sheet structure ratio, by mixed coal swelling property, regulate coal to regulate the turgidity of mixed coal, the swelling property of mixed coal is rationally controlled, be conducive to realize the reasonable utilization of coking coal resource, save high-quality caking coal, improve coke quality.Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique 6 meters of above coke oven dry coke quenching CSR >=65%.
Embodiment
Below in conjunction with embodiment, the present invention is described in more detail.
Single coking coal of planting in W factory has coking coal, 1/3 coking coal, lean coal (meager lean coal etc.), bottle coal, rich coal, gas-fat coal.Each single relevant performance perameter of planting coking coal is in Table 1, as can be seen from Table 1, coking coal and 1/3 coking coal are other the single coking coals of planting that affects mixed coal coking coarse grain pattern structure, coking coal, lean coal and meager lean coal are other the single coking coals of planting that affects mixed coal fiber and sheet structure, and rich coal regulates coal for affecting the mixed coal rheological of mixed coal coking coarse grain pattern structure.
Each single relevant performance perameter of planting coking coal of table 1
| Coal sample | Coking coarse grain pattern structure/% | (fiber+sheet) structure/% | Sub-turgidity b/% difficult to understand |
| Coking coal | 55 | 5 | 20 |
| 1/3 coking coal | 40 | 0 | 35 |
| Lean coal | 0 | 50 | Only shrink |
| Meager lean coal | 0 | 40 | Only shrink |
| Bottle coal | 0 | 0 | Only shrink |
| Rich coal | 35 | 0 | 180 |
| Gas-fat coal | 0 | 0 | 220 |
Embodiment 1
1) select to determine that rich coal and gas-fat coal regulate coal as mixed coal swelling property;
2) select coking coal, 1/3 coking coal, lean coal as other single coking coal of planting, and:
2.1) determine: coking coal: 40 ~ 45%; 1/3 coking coal: 25 ~ 35%; The coking coarse grain pattern structure of guaranteeing mixed coal is 32 ~ 48%;
2.2) determine: lean coal :≤15%, to guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) adjusting swelling property adjusting coal is the ratio of rich coal and gas-fat coal, determines gas-fat coal: 5%, and rich coal: 10%, making mixed coal sub-turgidity b difficult to understand is 5%; Then determine: coking coal: 40%, 1/3 coking coal: 30%, lean coal: 15%, making the coking coarse grain pattern structure of mixed coal is 37.5%, fiber and sheet structure sum are 9.5%.
Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique, the ratio by adjustment with the mixed coal swelling property adjusting coal of high-expansion energy, realized the reasonable utilization of coking coal resource, the turgidity of mixed coal is rationally controlled, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.5%.
Embodiment 2
1) select to determine that rich coal regulates coal as mixed coal swelling property;
2) select coking coal, 1/3 coking coal, lean coal as other single coking coals of planting, and:
2.1) determine: coking coal: 40 ~ 45%; 1/3 coking coal: 25 ~ 35%; The coking coarse grain pattern structure of guaranteeing mixed coal is 32 ~ 48%;
2.2) determine: lean coal :≤15%, to guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) adjusting swelling property adjusting coal is the ratio of rich coal, determines rich coal: 25%, and making mixed coal sub-turgidity b difficult to understand is 10%; Then determine: coking coal: 40%, 1/3 coking coal: 25%, lean coal: 10%, making mixed coal coking coarse grain pattern structure is 40.75%, fiber and sheet structure sum are 7%.
Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique, the ratio by adjustment with the mixed coal swelling property adjusting coal of high-expansion energy, realized the reasonable utilization of coking coal resource, the turgidity of mixed coal is rationally controlled, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:66%.
Embodiment 3
1) select to determine that gas-fat coal regulates coal as mixed coal swelling property;
2) select coking coal, 1/3 coking coal and lean coal as other single coking coals of planting, and:
2.1) determine: coking coal: 40 ~ 50%; 1/3 coking coal: 25 ~ 35%; Guarantee the coking coarse grain pattern structure of mixed coal > 35%;
2.2) determine: lean coal :≤15%, to guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) adjusting swelling property adjusting coal is the ratio of gas-fat coal, determines gas-fat coal: 10%, and making mixed coal sub-turgidity b difficult to understand is 5%; Then determine: coking coal: 45%, 1/3 coking coal: 30%, bottle coal: 5%, lean coal: 10%, making mixed coal coking coarse grain pattern structure is 36.75%, fiber and sheet structure sum are 9.25%.
Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique, the ratio by adjustment with the mixed coal swelling property adjusting coal of high-expansion energy, realized the reasonable utilization of coking coal resource, the turgidity of mixed coal is rationally controlled, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.2%.
Embodiment 4
1) select to determine that gas-fat coal regulates coal as mixed coal swelling property;
2) select coking coal, 1/3 coking coal, meager lean coal as other single coking coals of planting, and:
2.1) determine: coking coal: 40 ~ 50%; 1/3 coking coal: 25 ~ 35%; Guarantee the coking coarse grain pattern structure of mixed coal > 35%;
2.2) determine: meager lean coal :≤15%, to guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) adjusting swelling property adjusting coal is the ratio of gas-fat coal, determines gas-fat coal: 10%, and making mixed coal sub-turgidity b difficult to understand is 8%; Then determine: coking coal: 45%, 1/3 coking coal: 35%, meager lean coal: 10%, making mixed coal coking coarse grain pattern structure is 38.75%, fiber and sheet structure sum are 6.25%.
Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique, the ratio by adjustment with the mixed coal swelling property adjusting coal of high-expansion energy, realized the reasonable utilization of coking coal resource, the turgidity of mixed coal is rationally controlled, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.8%.
Embodiment 5
1) select to determine that rich coal regulates coal as mixed coal swelling property;
2) select coking coal, 1/3 coking coal, bottle coal, lean coal as other single coking coals of planting, and:
2.1) determine: coking coal: 40 ~ 50%; 1/3 coking coal: 20 ~ 30%, guarantee that the coking coarse grain pattern structure of mixed coal is 32 ~ 48%;
2.2) determine: lean coal :≤15%, to guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) adjust the ratio of rich coal, determine rich coal: 18%, making mixed coal sub-turgidity b difficult to understand is 8%; Then determine: coking coal: 42%, 1/3 coking coal: 25%, lean coal: 10%, bottle coal 5%, making mixed coal coking coarse grain pattern structure is 39.4%, fiber and sheet structure sum are 7.1%.
Do not adopting under the condition of coal damping, shaped coal technology and precomminution technique, the ratio by adjustment with the mixed coal rheological adjusting coal of high workability energy, realized the reasonable utilization of coking coal resource, the rheological of mixed coal is rationally controlled, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:66.0%.
Claims (8)
1. the expansile control method of mixed coal, is characterized in that: comprise the steps:
1) select to determine sub-turgidity b difficult to understand > single one or more of planting in coking coal of 80% regulate coal as mixed coal swelling property;
2) select to determine other single coking coal of planting, and according to described mixed coal swelling property, regulate the kind of coal, carry out respectively following 2.1), 2.2) step:
2.1) described mixed coal swelling property regulates coal containing the list of influential mixed coal coking coarse grain pattern structure, not plant coking coal, determine other the single proportional range of planting coking coal that affects mixed coal coking coarse grain pattern structure, guarantee the coking coarse grain pattern structure of mixed coal 35%; Then, carry out step 2.3);
2.2) described mixed coal swelling property regulates coal containing single coking coal of planting of influential mixed coal coking coarse grain pattern structure, determine other the single proportional range of planting coking coal that affects mixed coal coking coarse grain pattern structure, guarantee that the coking coarse grain pattern structure of mixed coal is 32 ~ 48%; Then, carry out step 2.3);
2.3) determine remaining other single proportional range of planting coking coal that affects mixed coal fiber and sheet structure, guarantee fiber and the sheet structure sum < 10% of mixed coal;
3) according to described mixed coal swelling property, regulate the kind of coal, carry out respectively following 3.1), 3.2) step:
3.1) described mixed coal swelling property regulates coal containing the list of influential mixed coal coking coarse grain pattern structure, not plant coking coal, adjust the ratio that described mixed coal swelling property regulates coal, mixed coal sub-turgidity b difficult to understand is adjusted between-5～15%, then determines described other single ratio of planting coking coal;
3.2) described mixed coal swelling property regulates coal containing single coking coal of planting of influential mixed coal coking coarse grain pattern structure, adjust the ratio that described mixed coal swelling property regulates coal, mixed coal sub-turgidity b difficult to understand is adjusted between-5～15%, then determine described other single ratio of planting coking coal, make the coking coarse grain pattern structure of mixed coal 35%.
2. the expansile control method of mixed coal as claimed in claim 1, is characterized in that: in described step 1), mixed coal swelling property adjusting coal is one or both in rich coal and gas-fat coal.
3. the expansile control method of mixed coal as claimed in claim 1 or 2, is characterized in that: described step 2.1), 2.2) in, described other single coking coal of planting that affects mixed coal coking coarse grain pattern structure comprises coking coal.
4. the expansile control method of mixed coal as claimed in claim 3, is characterized in that: described other single coking coal of planting that affects mixed coal coking coarse grain pattern structure also comprises 1/3 coking coal.
5. the expansile control method of mixed coal as claimed in claim 1 or 2, is characterized in that: described step 2.3), the described single kind coking coal that affects mixed coal fiber and sheet structure is one or both in lean coal and meager lean coal.
6. the expansile control method of mixed coal as claimed in claim 3, is characterized in that: described step 2.3), the described single kind coking coal that affects mixed coal fiber and sheet structure is one or both in lean coal and meager lean coal.
7. the expansile control method of mixed coal as claimed in claim 1 or 2, is characterized in that: described step 2), described other single coking coal of planting also comprises bottle coal.
8. the expansile control method of mixed coal as claimed in claim 3, is characterized in that: described step 2), described other single coking coal of planting also comprises bottle coal.
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| CN104140836B (en) * | 2014-07-15 | 2016-01-20 | 武汉钢铁(集团)公司 | The coal-blending coking method that low flowing high expansion lower shrinkage degree coking coal participates in |
| CN104140835B (en) * | 2014-07-15 | 2016-03-30 | 武汉钢铁(集团)公司 | The coal-blending coking method that the low flowing coking coal of high expansion lower shrinkage degree participates in |
| CN107216901B (en) * | 2017-07-14 | 2019-08-27 | 武汉钢铁有限公司 | The as-fired coal dilation control method of binder free typed briquette class |
| CN110713842A (en) * | 2019-09-19 | 2020-01-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Tamping coking resistance control method |
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| CN101134900B (en) * | 2007-10-18 | 2010-06-02 | 山西太钢不锈钢股份有限公司 | Coke coal blending ratio and coking method thereof |
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Effective date of registration: 20170712 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 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |