CN103194249A - Coal blending and coking method capable of reducing coke granularity - Google Patents
Coal blending and coking method capable of reducing coke granularity Download PDFInfo
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- CN103194249A CN103194249A CN2013101528284A CN201310152828A CN103194249A CN 103194249 A CN103194249 A CN 103194249A CN 2013101528284 A CN2013101528284 A CN 2013101528284A CN 201310152828 A CN201310152828 A CN 201310152828A CN 103194249 A CN103194249 A CN 103194249A
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Abstract
The invention discloses a coal blending and coking method capable of reducing the coke granularity. The method comprises the following steps of: 1) detecting the gelatinous layer index of regulating coal to obtain a final shrinkage degree X, and observing the volume curve of the gelatinous layer; preparing the regulating coal with the final shrinkage degree X more than 35mm or the regulating coal with the final shrinkage degree X less than or equal to 35mm and more than 28mm and a zigzag shaped volume curve of the gelatinous layer, wherein the regulating coal accounts for 25 to 40 percent of the coke by weight and comprises gas coal and 1/3 coking coal, and the gas coal accounts for 0 to 10 percent of the regulating coal by weight; and 2) adding other single coals to realize the sum of the gas-fat coal and fat coal to be between 8 and 15 percent by weight, the coking coal to be between 32 and 42 percent by weight, and lean coal to be between 5 to 13 percent by weight. The method can be used for improving the coke granularity from the point of coal blending and coking, does not need to change the prior production process or add other mill coal, can be used for regulating the coke granularity by regulating the existing coal blending structure, is simple in implementation, strong in operability and low in cost.
Description
Technical field
The invention belongs to the coke making and coal blending technical field, be specifically related to a kind of coke making and coal blending method that reduces coke size.
Background technology
Coke is the skeleton function of furnace charge to one of main effect of blast furnace ironmaking, and the ventilation property of bottom house stock column is almost completely kept by coke in the smelting process, plays the transom effect of coal gas.Suitable coke mean particle size is most important to the blast furnace stable and high yields.Guarantee blast furnace burden direct motion, ventilative, especially under the situation of oxygen-enriched coal spray, the granularity of coke must be even as far as possible.Concrete size composition is determined according to furnace volume, raw materials used situation and blast furnace operating system.Coke size is excessive, differs greatly with ore grain size, influences the homogeneity that the coal gas fluid layer distributes, and influences the reduction reaction of coke in blast furnace.
Though used coke oven type, the quenching mode of coal chemical enterprise is the important factor that influences coke size, is limited by many condition restriction such as place, fund, in case build up, it is difficult to change.At present, the method for improving coke size mainly concentrates on the following aspects: regulate coke size (as: D. R. Jenkins, Liu Youcun [translating], Wang Siwei [check and correction] by changing heating means to control certain average fire path temperature 1.; The iron and steel collection of translations; The 1st phase in 2011).2. (as: Xu Jun, Sun Xiuhuan pay by force, Zhang Jingbo to improve coke size by materials such as adding plastic waste, coke powder, refinery coke, high-carbon material, non-coking coal; The product yield and the performance study that add the plastic waste coal-blending coking; The metallurgical energy; 2004 the 6th phases).3. by the coking new technology, technologies such as coking coal pre-treatment make coke size evenly (as: Fan Runhan, Yu Wenhua etc.; The discussion that the coal humidifying technology is used in Coal Chemical Industry company; Climb the steel technology; The 6th phase in 1999).4. improve coke size by regulating coke oven standard temperature and coking time.But because above method is to adjust by the method STRENGTH ON COKE granularity beyond the coke making and coal blending, the rectification expense is higher, and production process problem to be solved is more, and feasibility aborning is not very strong.
Summary of the invention
The object of the present invention is to provide a kind of coke making and coal blending method that reduces coke size.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of coke making and coal blending method that reduces coke size comprises the steps:
1) measures the plastometer indice of regulating coal, obtain final contraction value X, observe volume curve of plastic layer; Allocate final contraction value into: X〉the adjusting coal of 35mm, or allocating final contraction value: 35 〉=X into〉28mm and volume curve of plastic layer be the adjusting coal of " it " font, by weight, regulating coal is 25 ~ 40%, described adjusting coal is bottle coal and 1/3 coking coal, and bottle coal is 0 ~ 10% by weight;
2) allocate other single coal of planting into, making gas-fat coal and rich coal sum is 8 ~ 15% by weight, and coking coal is 32 ~ 42% by weight, and lean coal is 5 ~ 13% by weight.
Further, described adjusting coal is 33 ~ 40% by weight, and described lean coal is 10 ~ 13% by weight, and described gas-fat coal is 0% by weight.
The present invention has following advantage: produce coal-blending coking according to above coke making and coal blending method, comparable original blending method is science, reasonable more, is conducive to improve coke size.
1) the present invention improves coke size from the coke making and coal blending angle, need not to change existing production technique, need not add other non-coking coal, by existing coal blending structure is adjusted, regulates coke size, implements simple, workable.
2) different single volume curve of plastic layer differences of planting coal, the shrink grading difference, the influence of its STRENGTH ON COKE granularity is also different.The present invention makes coking coal bring into play the otherness of its STRENGTH ON COKE particle size influences to greatest extent by utilizing the coal characteristics of different coking coals, has more specific aim aspect the coke size improving, and does not increase cost.
3) carry out coal-blending coking by the inventive method, gained coke mean particle size is 53-58mm.
Embodiment
The present invention is described further below in conjunction with embodiment.
Existing blending method is Comparative Examples 1, and institute's coking carbon granule degree is bigger than normal, and method of the present invention is embodiment 1 ~ 5, institute's coking carbon granule degree appropriateness is reduced, thereby it is required to satisfy production practice.
Comparative Examples 1
In this Comparative Examples, by weight, coking coal is 42%, and bottle coal is that 5%, 1/3 coking coal is 28%, and gas-fat coal is 5%, and rich coal is 10%, and lean coal is 10%.
After measured, the shrink grading of bottle coal is 45mm, and volume curve of plastic layer is level and smooth decline type; The shrink grading of 1/3 coking coal is microwave-type for the 28mm volume curve of plastic layer; Coking gained coke size is 64mm.
Embodiment 1
In the present embodiment, by weight, coking coal is 42%, and bottle coal is that 5%, 1/3 coking coal is 28%, and gas-fat coal is 5%, and rich coal is 10%, and lean coal is 10%.
Wherein, the shrink grading of bottle coal is 45mm, and volume curve of plastic layer is level and smooth decline type; The shrink grading of 1/3 coking coal is 37mm, and volume curve of plastic layer is " it " font; Coking gained coke mean particle size is 55mm.
Embodiment 2
In the present embodiment, by weight, coking coal is 42%, and bottle coal is that 5%, 1/3 coking coal is 28%, and gas-fat coal is 5%, and rich coal is 10%, and lean coal is 10%.
Wherein, the shrink grading of bottle coal is 38mm, and volume curve of plastic layer is level and smooth decline type; The shrink grading of 1/3 coking coal is 40mm, and volume curve of plastic layer is waveform; Coking gained coke size is 52mm.
Embodiment 3
In the present embodiment, by weight, coking coal is 42%, and bottle coal is that 5%, 1/3 coking coal is 28%, and gas-fat coal is 5%, and rich coal is 10%, and lean coal is 10%.
Wherein, the shrink grading of bottle coal is 52mm, and volume curve of plastic layer is level and smooth decline type; The shrink grading of 1/3 coking coal is " it " font for the 29mm volume curve of plastic layer; Coking gained coke size is 56mm.
Embodiment 4
In the present embodiment, by weight, coking coal is that 42%, 1/3 coking coal is 33%, and gas-fat coal is 5%, and rich coal is 10%, and lean coal is 10%.
Wherein, the shrink grading of 1/3 coking coal is 36mm, and volume curve of plastic layer is " it " font; Coking gained coke size is 55mm.
Embodiment 5
In the present embodiment, by weight, coking coal is 34%, and bottle coal is that 8%, 1/3 coking coal is 32%, and rich coal is 13%, and lean coal is 13%.
Wherein, the shrink grading of bottle coal is 45mm, and volume curve of plastic layer is microwave-type; The shrink grading of 1/3 coking coal is 36mm, and volume curve of plastic layer is wave mode; Coking gained coke size is 53mm.
Among Comparative Examples and each embodiment, except adjusting coal (bottle coal and 1/3 coking coal) was different, it was the identical or close single kind coals of indexs such as source unanimity, technical analysis that Comparative Examples is planted coal (for example lean coal) with other the identical list among the different embodiment.The present inventor draws through test of many times simultaneously, as long as regulate the final contraction value of coal: X〉35mm, or regulating the final contraction value of coal: 35 〉=X〉28mm and volume curve of plastic layer be " it " font, and by weight, the amount of allocating into of regulating coal is 25 ~ 40%, no matter then other its source of single kind coal how, indexs such as technical analysis how, be 8 ~ 15% by weight as long as satisfy gas-fat coal and rich coal sum, coking coal is 32 ~ 42% by weight, lean coal is 5 ~ 13% by weight, can satisfy purpose of the present invention.
Claims (2)
1. a coke making and coal blending method that reduces coke size is characterized in that: comprise the steps:
1) measures the plastometer indice of regulating coal, obtain final contraction value X, observe volume curve of plastic layer; Allocate final contraction value X into〉35mm, or final contraction value 35 〉=X 28mm and volume curve of plastic layer be the adjusting coal of " it " font, by weight, regulating coal is 25 ~ 40%, described adjusting coal is bottle coal and 1/3 coking coal, and bottle coal is 0 ~ 10% by weight;
2) allocate other single coal of planting into, making gas-fat coal and rich coal sum is 8 ~ 15% by weight, and coking coal is 32 ~ 42% by weight, and lean coal is 5 ~ 13% by weight.
2. the coke making and coal blending method of reduction coke size according to claim 1, it is characterized in that: described adjusting coal is 33 ~ 40% by weight, and described lean coal is 10 ~ 13% by weight, and described gas-fat coal is 0% by weight.
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Cited By (6)
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| CN105567270A (en) * | 2015-12-16 | 2016-05-11 | 武汉钢铁(集团)公司 | Coal blending coke making method capable of controlling shrinkage degree of as-fired coal |
| CN105778960A (en) * | 2016-05-04 | 2016-07-20 | 武汉钢铁股份有限公司 | Controlling method for shrinkage degree of coal-as-fired with different moisture |
| CN105838407A (en) * | 2016-05-04 | 2016-08-10 | 武汉钢铁股份有限公司 | Coking coal blending method for controlling shrinkage degree of blended coal |
| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN111855618A (en) * | 2020-07-30 | 2020-10-30 | 宁夏宝丰能源集团股份有限公司 | Identification method of single coal |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567270A (en) * | 2015-12-16 | 2016-05-11 | 武汉钢铁(集团)公司 | Coal blending coke making method capable of controlling shrinkage degree of as-fired coal |
| CN105567270B (en) * | 2015-12-16 | 2018-03-20 | 武汉钢铁有限公司 | Control the coal-blending coking method of as-fired coal degree of shrinkage |
| CN105778960A (en) * | 2016-05-04 | 2016-07-20 | 武汉钢铁股份有限公司 | Controlling method for shrinkage degree of coal-as-fired with different moisture |
| CN105838407A (en) * | 2016-05-04 | 2016-08-10 | 武汉钢铁股份有限公司 | Coking coal blending method for controlling shrinkage degree of blended coal |
| CN105778960B (en) * | 2016-05-04 | 2018-10-19 | 武汉钢铁有限公司 | A kind of control method of the degree of shrinkage of different in moisture as-fired coal |
| CN109447434A (en) * | 2018-10-16 | 2019-03-08 | 武汉钢铁有限公司 | The furnace granularity that enters of coking coal determines method and the application in coking coal preparation technique |
| CN109447434B (en) * | 2018-10-16 | 2022-03-15 | 武汉钢铁有限公司 | Method for determining charging granularity of coking coal and application of method in coking coal preparation process |
| CN110591748A (en) * | 2019-09-29 | 2019-12-20 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN110591748B (en) * | 2019-09-29 | 2021-03-09 | 武汉钢铁有限公司 | Coal blending method for controlling and improving coke granularity |
| CN111855618A (en) * | 2020-07-30 | 2020-10-30 | 宁夏宝丰能源集团股份有限公司 | Identification method of single coal |
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Effective date of registration: 20170714 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. |