CN103194249B - 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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- CN103194249B CN103194249B CN201310152828.4A CN201310152828A CN103194249B CN 103194249 B CN103194249 B CN 103194249B CN 201310152828 A CN201310152828 A CN 201310152828A CN 103194249 B CN103194249 B CN 103194249B
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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 Coking Coal Blending Technology field, be specifically related to a kind of coke making and coal blending method that reduces coke size.
Background technology
One of coke Main Function to blast furnace ironmaking is the skeleton function of furnace charge, and in smelting process, the ventilation property of bottom house stock column is almost maintained by coke completely, plays the transom effect of coal gas.Suitable coke mean particle size is most important to blast furnace stable and high yields.Ensure blast furnace burden direct motion, ventilative, especially, the in the situation that 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, affects the homogeneity that coal gas fluid layer distributes, and affects the reduction reaction of coke in blast furnace.
Although coal chemical enterprise coke oven type, quenching mode used is the important factor that affects coke size, is limited by many condition restriction such as place, fund, once build up, it is more 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.; Iron and steel collection of translations; The 1st phase in 2011).2. by adding the materials such as plastic waste, coke powder, refinery coke, high-carbon material, non-coking coal to improve coke size (as: Xu Jun, Sun Xiuhuan, Fu Qiang, Zhang Jingbo; Add product yield and the performance study of Co-coking With Coal And Waste Plastics; Energy supply for metallurgy; 2004 the 6th phases).3. by New Coke-making Technology, the techniques such as coking coal pre-treatment make evenly (as: Fan Runhan, remaining Wenhua etc. of coke size; Coal humidifying technology is in the discussion of Coal Chemical Industry company application; Climb steel technology; The 6th phase in 1999).4. by regulating coke oven standard temperature and coking time to improve coke size.But because above method is to adjust by the method STRENGTH ON COKE granularity beyond coke making and coal blending, rectification expense is higher, production process more problems to be solved, feasibility is aborning 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 coke making and coal blending method that reduces coke size, comprises the steps:
1) measure the plastometer indice that regulates coal, obtain final contraction value X, observe volume curve of plastic layer; Allocate final contraction value into: the adjusting coal of X>35mm, or allocate the adjusting coal that final contraction value: 35 >=X>28mm and volume curve of plastic layer are " it " font into, 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.
Tool of the present invention has the following advantages: produce coal-blending coking according to above coke making and coal blending method, comparable original blending method is more scientific, reasonable, is conducive to improve coke size.
1) the present invention improves coke size from coke making and coal blending angle, without changing existing production technique, need not add other non-coking coal, by existing Blending is adjusted, regulates coke size, implements simple, workable.
2) different single volume curve of plastic layer differences of planting coal, shrink grading difference, the impact of its STRENGTH ON COKE granularity is also different.The present invention, by utilizing the coal characteristics of different coking coals, makes coking coal bring into play to greatest extent the otherness of its STRENGTH ON COKE particle size influences, has more specific aim improving aspect coke size, and does not increase cost.
3) carry out coal-blending coking by the inventive method, gained coke mean particle size is 53-58mm.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Existing blending method is comparative example 1, the coke size of refining bigger than normal, method of the present invention is embodiment 1 ~ 5, can make refined coke size appropriateness reduce, thereby it is required to meet production practice.
Comparative example 1
In this comparative example, 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 down type; The shrink grading of 1/3 coking coal is that 28mm volume curve of plastic layer is microwave-type; 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 down 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 down 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 down type; The shrink grading of 1/3 coking coal is that 29mm volume curve of plastic layer is " it " font; 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.
In comparative example and each embodiment, except regulating coal (bottle coal and 1/3 coking coal) difference, comparative example such as, is the identical or close single coals of planting of index such as source is consistent, technical analysis with other the identical single coal (lean coal) of planting in 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 the final contraction value of adjusting coal: 35 >=X>28mm and volume curve of plastic layer are " it " font, and by weight, regulating the amount of allocating into of coal is 25 ~ 40%, no matter other its source of single kind coal how, the indexs such as technical analysis how, be 8 ~ 15% by weight as long as meet gas-fat coal and rich coal sum, coking coal is 32 ~ 42% by weight, lean coal is 5 ~ 13% by weight, can meet object of the present invention.
Claims (1)
1. a coke making and coal blending method that reduces coke size, is characterized in that: comprise the steps:
1) measure the plastometer indice that regulates coal, obtain final contraction value X, observe volume curve of plastic layer; Allocate final contraction value X > 35mm into, or final contraction value 35 >=X > 28mm and volume curve of plastic layer are the adjusting coal of " it " font, by weight, regulating coal is 33～40%, 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 rich coal is 8～15% by weight, and coking coal is 32～42% by weight, and lean coal is 10～13% by weight.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN105838407B (en) * | 2016-05-04 | 2018-07-06 | 武汉钢铁有限公司 | A kind of coking coal application method for controlling mixed coal degree of shrinkage |
| 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 |
| 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. |
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