CN114507536B - Coal blending method for improving crushing strength of coke - Google Patents
Coal blending method for improving crushing strength of coke Download PDFInfo
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Abstract
The invention discloses a coal blending method for improving the crushing strength of coke, which comprises the following steps: selecting gas coal, lean coal, 1/3 coking coal 1#, 1/3 coking coal 2#, fat coal and coking coal, wherein the fat coal is selected from any one of the following combinations: the coking coal comprises fat coal 1# and fat coal 3#, fat coal 1# and fat coal 4#, fat coal 2# and fat coal 3#, fat coal 2# and fat coal 4#, and the coking coal is selected from any one of the following combinations: coking coal No. 1, coking coal No. 2, coking coal No. 3, coking coal No. 1, coking coal No. 3, coking coal No. 4, coking coal No. 2, coking coal No. 3 and coking coal No. 4. According to the invention, through optimized combination and reasonable blending of fat coal and coking coal with different qualities, when the blending ratio of gas coal to lean coal reaches more than 20%, top-mounted coke ovens with the length of 6 meters and more than 6 meters are used for coking, and the obtained dry quenched coke M 40 >88.5 percent, and the coke mass satisfies 3000m 3 As required by the blast furnace.
Description
Technical Field
The invention relates to the technical field of coal blending and coking, in particular to a coal blending method for improving the crushing strength of coke.
Background
Coke is one of the main raw fuels for blast furnace smelting. With the development of large-scale blast furnaces and oxygen-enriched blowing technology, the residence time of coke in the blast furnace is increased along with the development of the oxygen-enriched blowing technology, and the load is increased continuously, which puts higher requirements on the quality of the coke. In order to ensure the smooth operation of blast furnaces, the coke quality requirement is increased year by iron and steel enterprises, but the high-quality coking coal resource is reduced year by year, so that in the limited resource, the coking coal resource needs to be further reasonably matched, and the coke quality is improved by optimal matching under the condition of not increasing the resource cost.
The crushing strength of the coke mainly simulates the skeleton hardness of the coke in a blast furnace and the crushing strength in the transportation process, and is an important quality index of the coke for the blast furnace. The crushing strength of the coke is improved, the loose framework of the blast furnace charge column can be improved, and the air permeability and the liquid permeability of the blast furnace operation are ensured. The traditional coal blending method considers that the improvement of the crushing strength of coke is predicted by the fitting of a cohesiveness index G value and a volatile component, but the G value additivity is poor, and when the difference of coal types is large, the G value additivity has deviation.
High-quality coking coal resources are increasingly in short supply, but the quality requirement of coke is increasingly high, particularly the quality of fat coal, although the Y value reaches the national standard, the flow and expansion are still not high, the mutual contact between coal particles is not promoted, and the coke strength is finally influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a coal blending method for improving the crushing strength of coke. When the fat coal quality is reduced (the Aua expansion degree is less than 80%, the fluidity is less than 5000 ddpm), and the using amount of gas coal and lean coal is more than 20%, the resources are reasonably utilized, the coal blending cost is reduced, the coal blending is optimized to produce high-strength coke, the coke is coked in a 6M top-loading coke oven, and the crushing strength of the obtained coke reaches M 40 >88.5 percent, and the coke mass satisfies 3000m 3 As required by the blast furnace.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a coal blending method for improving the crushing strength of coke is characterized in that gas coal, fat coal, 1/3 coking coal, coking coal and lean coal are selected as coal types, wherein: gas coal: g value >80; lean coal: a G value >30;
fat coal is classified as follows:
fat coal 1#: vdaf:28 to 33 percent, Y value is more than 25mm, australia b value is less than or equal to 80 percent, and fluidity is less than or equal to 5000ddpm; fat coal 2#: vdaf: 28-33%, Y value is more than 25mm, australia b value is more than 80%, and fluidity is less than or equal to 5000ddpm; fat coal 3#: vdaf: 28-33%, Y value >25mm, olympic b value >80%, fluidity >5000ddpm; fat coal 4#: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000ddpm;
the 1/3 coking coal is classified as follows:
1/3 coking coal 1#: vdaf is less than or equal to 32 percent, G value is more than or equal to 85 percent, and fluidity is more than or equal to 1000ddpm;1/3 coking coal 2#: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000ddpm;
the coking coals are classified as follows:
1# of coking coal: vdaf:18 to 28 percent; the G value is more than or equal to 80, the coarse grain inlay is more than or equal to 55 percent, and the fluidity is more than or equal to 1000ddpm; coking coal 2#: vdaf:18 to 28 percent; the G value is more than or equal to 80, the coarse grain inlay is more than or equal to 55 percent, and the fluidity is less than 1000ddpm; coking coal 3#: vdaf:22 to 28 percent; the G value is more than or equal to 80, the coarse grains are embedded in 48-55%, and the fluidity is less than 1000ddpm; 4# of coking coal: vdaf:18 to 22 percent; the G value is more than or equal to 80, the coarse grains are embedded in 48-55%, and the fluidity is less than 1000ddpm;
the coal blending method comprises the following steps: selecting the gas coal, the lean coal, the 1/3 coking coal 1#, the 1/3 coking coal 2#, the fat coal and the coking coal, wherein the fat coal is selected from any one of the following combinations: the coking coal comprises fat coal 1# and fat coal 3#, fat coal 1# and fat coal 4#, fat coal 2# and fat coal 3#, fat coal 2# and fat coal 4#, and the coking coal is selected from any one of the following combinations: coking coal No. 1, coking coal No. 2, coking coal No. 3, coking coal No. 1, coking coal No. 3, coking coal No. 4, coking coal No. 2, coking coal No. 3 and coking coal No. 4.
Preferably, the low-flow fat coal with inferior quality is efficiently utilized: the rich coal No. 1 has low fluidity and low expansion degree, can not play a role of the rich coal when being used alone, particularly when the blending proportion of the gas coal and the lean coal reaches more than 20%, the rich coal No. 1 is blended alone, the coke crushing strength is low, so the rich coal No. 3 with better quality is combined with the rich coal No. 1 and the rich coal No. 3, the blending proportion is 18-25%, the blending proportion is low, the wear-resisting strength is reduced and the blending ratio is high because of the weak caking coal (the gas coal and the lean coal) of more than 20%, and the matrix strength is damaged due to the coke bubbles Jiao Duo. The coking coal quality also has obvious influence on the coke crushing strength, the coking coal No. 1 and the coking coal No. 2 are coal types with stronger coking property, the coal quality is good, the price is higher, the blending proportion is low, the coke crushing strength is reduced, the blending proportion exceeds 30 percent, the economy is damaged, the resource is wasted, the ratio of the coking coal No. 1 to the coking coal No. 2 is 25 to 30 percent, and in addition, the coking coal No. 3 with inferior coking property in a certain proportion is blended;
the specific blending range of each coal is as follows:
gas coal: 8 to 15 percent; fat coal 1#:8% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10 to 14 percent.
Preferably, the coal blending method comprises the following steps: the high-volatile fertilizer coal is efficiently utilized: the high volatile fertilizer coal has low deterioration degree and strong mobility of the colloidal body, and the high volatile fertilizer coal is combined with the low-mobility fertilizer coal 1#, so that the mobility of the fertilizer coal is improved, the viscosity of the colloidal body is enhanced, the coke crushing strength is facilitated, but the blending proportion still needs to be controlled, the proportion of the fertilizer 1 plus the fertilizer 4 is not more than 20 percent, the proportion of the coke 1 plus the coke 2 plus the coke 3 is combined, and the proportion of the coke 1 plus the coke 2# is 25-30 percent;
the specific blending range of each coal is as follows
Gas coal: 8 to 12 percent; fat coal 1#:10% -15%; fat coal 4#:5% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10 to 14 percent.
Preferably, the coal blending method comprises the following steps: the low-flow high-expansion fat coal is efficiently utilized (combined with the fat coal 3# of volatile components in the high-flow fat coal): the fat coal No. 2 is low-flow high-expansion fat coal, the fluidity of the fat coal colloid is low and the expansion is high, so that the fat coal colloid is limited to be fully combined with other coking coals, the certain fluidity of the fat coal colloid is improved by combining the high-flow fat coal No. 3, the coking of the fat coal colloid and other coking coals is promoted, and the crushing strength of coke is improved, but the ratio of the fat coal No. 2+ the fat coal No. 3 is not more than 20%, the ratio of the coking coal No. 1, the coking coal No. 2 and the coking coal No. 3 is combined, and the ratio of the coking coal No. 1+ the coking coal No. 2 is 25-30%;
the specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10 to 14 percent.
Preferably, the coal blending method comprises the following steps: the low-flow high-expansion fat coal is efficiently utilized (combined with the high-flow fat coal 4 #): the fat coal 2# is low-flow high-expansion fat coal, the fluidity of the fat coal colloid is low and the expansion is high, so that the fat coal colloid is limited to be fully combined with other coking coals, the certain fluidity of the fat coal is improved by combining the high-flow high-volatility fat coal 4# to promote the coking of the fat coal and other coking coals and improve the crushing strength of coke, but the ratio of the fat coal 2# to the fat coal 4# is not more than 20 percent, the ratio of the coke 1 to the coke 2 to the coke 3 is combined, the ratio of the fertilizer coal 2 to the fertilizer 4 is not more than 20 percent, and the ratio of the coke 1 to the coke 2# is 25 to 30 percent;
the specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 4#:8 to 13 percent; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5-15%, coking coal 2#:10% -25%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent.
Preferably, the coal blending method comprises the following steps: the low-volatile coking coal is efficiently utilized: coking coal No. 4 is low-volatile coking coal, the low-volatile coking coal with certain caking is matched, the matrix strength of coke is very favorable for improving, the coking coal is combined with high-quality coking coal (coking coal No. 1 or coking coal No. 2) and common coal coking coal (coking coal No. 3) in a certain proportion, and the high-quality coking coal is saved (namely the proportion of the coking coal No. 1 or the coking coal No. 2 is smaller than that of the coking coal No. 1, the coking coal No. 3 and the coking coal No. 4, or the coking coal No. 2, the coking coal No. 3 and the coking coal No. 4, and the coking coal No. 1 or the coking coal No. 2: 5 to 15 percent of the total weight of the coke 1 (coke 2) and the coke 4# is 25 to 30 percent. The rich coal is a combination of low-flow rich coal (fertilizer 1 or fertilizer 2) and high-flow rich coal (fertilizer 3 or fertilizer 4), and the proportion is 20%;
the specific blending range of each coal is as follows:
when the coking coal adopts the combination of coking coal No. 1, coking coal No. 3 and coking coal No. 4, the gas coal: 8 to 12 percent; 20% of fertilizer; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5-15%, coking coal 4#:10% -20%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent;
when the coking coal adopts the combination of coking coal No. 2, coking coal No. 3 and coking coal No. 4, the gas coal: 8 to 12 percent; 20% of fertilizer; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; coking coal 2#: 5-15%, coking coal 4#:10% -20%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent.
More preferably, the low-fluidity fat coal is fat coal # 1 or fat coal # 2, and the high-fluidity fat coal is fat coal # 3 or fat coal # 4.
Further preferably, each blending coal should satisfy: the volatile component Vdaf is less than 27 percent, the G value is 79-83, and the Y value is 15-17 mm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
by adopting the matching method for improving the crushing strength of the coke, disclosed by the invention, through optimized combination and reasonable matching of fat coal with different qualities and coking coal with different qualities, when the matching proportion of gas coal and lean coal reaches more than 20%, a coke oven is arranged on the top of 6 meters or more than 6 meters for coking, and the obtained dry quenched coke M 40 >88.5 percent, and the coke mass satisfies 3000m 3 As required by the blast furnace.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods. Of course, the scope of protection of the invention is not limited to the following examples.
The invention provides a coal blending method for improving the crushing strength of coke, which comprises the following steps:
step 1, selecting and classifying coal types:
the common coal types are as follows: gas coal, fat coal, 1/3 coking coal, coking coal and lean coal.
Five major types of coal for coking are further subdivided according to different coal types:
gas coal: g value >80; (the patent requires that the crushing strength of the coke reaches over 88.5 percent, the requirement is high, the strength of the coke cannot meet the requirement when the coke is used with gas coal with lower G value.)
Coal fertilizing:
fat coal 1#: vdaf:28 to 33 percent, Y value is more than 25mm, australia b value is less than or equal to 80 percent, and fluidity is less than or equal to 5000ddpm;
fat coal 2#: vdaf: 28-33%, Y value is more than 25mm, australia b value is more than 80%, and fluidity is less than or equal to 5000ddpm;
fat coal 3#: vdaf: 28-33%, Y value >25mm, olympic b value >80%, fluidity >5000ddpm;
fat coal 4#: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000ddpm;
1/3 coking coal:
1/3 coking coal 1#: vdaf is less than or equal to 32 percent, G value is more than or equal to 85 percent, and fluidity is more than or equal to 1000ddpm;
1/3 coking coal 2#: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000ddpm;
the 1/3 coking coal is a common coking coal type, the high-quality 1/3 coking coal also has certain fluidity, such as 1# of the 1/3 coking coal, the strength of the supported coke can be higher, the blending proportion can be higher, but the 1/3 coking coal with the fluidity lower than 1000ddpm can not support the strength of the supported coke enough, and only can be used in a limited amount.
Coking coal
1# of coking coal: vdaf:18 to 28 percent; the G value is more than or equal to 80, the coarse grain inlay is more than or equal to 55 percent, and the fluidity is more than or equal to 1000ddpm;
coking coal 2#: vdaf:18 to 28 percent; the G value is more than or equal to 80, the coarse grain inlay is more than or equal to 55 percent, and the fluidity is less than 1000ddpm;
3# of coking coal: vdaf:22 to 28 percent; the G value is more than or equal to 80, the coarse grains are embedded in 48-55%, and the fluidity is less than 1000ddpm;
4# of coking coal: vdaf:18 to 22 percent; the G value is more than or equal to 80, the coarse grains are embedded in 48-55%, and the fluidity is less than 1000ddpm;
lean coal: the G value is >30. (the patent requires that the crushing strength of coke reaches more than 88.5 percent, the requirement is high, the consumption of the lean coal is more than 10 percent and is higher than the domestic industry level, the low G value and the lean coal are used with high efficiency, the influence on the coke strength is obvious, and the crushing strength requirement required by the patent cannot be met.)
And 2, when the consumption of the gas coal and the lean coal reaches more than 20 percent (the gas coal and the lean coal belong to weak caking coal in coking coal and are limited, the consumption is generally lower than the level of 20 percent in domestic steel mills, and the consumption of the gas coal and the lean coal is 20 to 26 percent in the patent and belongs to a higher level), the coke matrix strength is supported by the quality of the coking coal and the fat coal with certain quality, and the requirement that the crushing strength of the coke reaches more than 88.5 percent can be met. However, the coking coal of each ore point has uneven quality, and in order to reasonably utilize resources and obtain coke with higher crushing strength, a plurality of resource structure combinations are provided according to each subdivided coal type.
The method comprises the following steps of optimizing and combining resources, wherein the raw materials are rich coal 1# and rich coal 3#, the raw materials are rich coal 1# and rich coal 4#, the raw materials are rich coal 2# and rich coal 3#, the raw materials are rich coal 2# and rich coal 4#, the raw materials are coking coal 1# and coking coal 2# and coking coal 3#, the raw materials are coking coal 1# and coking coal 3# and coking coal 4# and the raw materials are coking coal 2# and coking coal 3# and coking coal 4# are matched.
And 3, combining different resource structures and different coal blending structures.
(1) The composition of fat coal 1# and fat coal 3# and the composition of coking coal 1#, coking coal 2# and coking coal 3#, wherein the ratio of the fat coal 1# + the fat coal 3# is not more than 25 percent, and the ratio of the coking coal 1# + the coking coal 2# is 25-30 percent. The specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 1#:8% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:10 to 20 percent; lean coal: 13 to 14 percent.
(2) The composition of fat coal 1# and fat coal 4# and the composition of coking coal 1#, coking coal 2# and coking coal 3#, wherein the mixture ratio of the fat coal 1# + the fat coal 4# is not more than 20 percent, and the mixture ratio of the coking coal 1# + the coking coal 2# is 25-30 percent. The specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 1#:10% -15%; fat coal 4#:5% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:10% -20%; lean coal: 13 to 14 percent.
(3) The mixture of fat coal No. 2 and fat coal No. 3, the mixture of coking coal No. 1, coking coal No. 2 and coking coal No. 3, the mixture ratio of the fat coal No. 2 and the coking coal No. 3 is not more than 20 percent, and the mixture ratio of the coking coal No. 1 and the coking coal No. 2 is 25 to 30 percent. The specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:10% -20%; lean coal: 13 to 14 percent.
(4) The fertilizer coal 2# and the fertilizer coal 4# are combined, the coking coal 1# and the coking coal 2# are combined with the coking coal 3# and the mixture ratio of the fertilizer coal 2# and the coking coal 4# is 15-20 percent and the mixture ratio of the coking coal 1# and the coking coal 2# is 25-30 percent. The specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 4#:8 to 13 percent; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:10% -20%; lean coal: 13 to 14 percent.
(5) The fat coal is 8-12% of low-flow fat coal (fat coal 1# or fat coal 2 #) and 8-12% of high-flow fat coal (fat coal 3# or fat coal 4 #), the proportion of the fat coal is 20%, but the coking coal is the combination of coking coal 1#, coking coal 3# and coking coal 4#, or the combination of coking coal 2#, coking coal 3# and coking coal 4#, the specific blending range of the coking coal 1# (coking coal 2 #) and the coking coal 4# is 25-30%, and the specific blending range of each coal is as follows:
gas coal: 8 to 12 percent; fat coal 1# (fat coal 1 #): 8 to 12 percent; fat coal 3# (fat coal 4 #): 8 to 12 percent; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5-15%, coking coal 4#:10% -20%, coking coal 3#:10 to 20 percent; lean coal: 13 to 14 percent.
Vdaf of volatile components of the above coal<27.00 percent, a G value of 79 to 83 percent and a Y value of 15 to 17mm. The method is characterized in that rich coal with different qualities and coking coal with different qualities are optimally combined and reasonably matched. Coking with top-charging coke oven of 6M or more and dry-quenched coke M 40 >88.5 percent, and the coke mass satisfies 3000m 3 As required by the blast furnace.
Example (b):
step 1: the analytical data of the coal quality of various types of coal of coking plants including 1# coking coal, 2# coking coal, 3# coking coal, 4# coking coal, 1/3 coking coal, 1# 1/3 coking coal, 2# gas coal, 1# fat coal, 2# fat coal, 3# fat coal, 4# fat coal and lean coal are shown in Table 1.
TABLE 1 Single coal Experimental data
Step 2: and (4) optimizing and combining different resources.
The method comprises the following steps of mixing fat coal 1# with fat coal 3#, fat coal 1# with fat coal 4#, mixing fat coal 2# with fat coal 3#, mixing fat coal 2# with fat coal 4#, mixing coking coal 1#, coking coal 2# with coking coal 3#, mixing coking coal 1#, mixing coking coal 4# with coking coal 3 #.
And 3, step 3: different resource structure combinations and different coal blending structures.
(1) The fertilizer coal 1# and the fertilizer coal 3# are combined, the coking coal 1# and the coking coal 2# are combined, the ratio of the fertilizer coal 1# to the coking coal 3# is 17-25%, and the ratio of the coking coal 1# to the coking coal 2# is 25-30%.
TABLE 2 coal blending protocol
TABLE 3 blending coal volatiles and coke quality
| Scheme(s) | Blending coal volatile/percent | 6M dry quenching coke M 40/％ |
| Reference scheme 1 | 26.78 | 89.0 |
| Comparative scheme 2 | 26.45 | 88.0 |
| Comparative scheme 3 | 26.74 | 87.9 |
| Comparative scheme 4 | 27.42 | 87.5 |
As can be seen from tables 2 and 3: in the reference scheme, the coal blending volatile content is 26.78 percent and is within 27 percent of the control range, and 6M dry quenching M is adopted 40 89.0 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m 3 As required by the blast furnace.
(2) The fertilizer coal 1# and the fertilizer coal 4# are combined, the coking coal 1# and the coking coal 2# are combined with the coking coal 3# and the mixture ratio of the fertilizer coal 1# and the coking coal 4# is 16-20 percent and the mixture ratio of the coking coal 1# and the coking coal 2# is 25-30 percent. The specific blending range of each coal is as follows:
TABLE 4 coal blending protocol
TABLE 5 coal blending volatiles and coke quality
| Scheme(s) | Blending coal volatile/percent | 6M dry quenching coke M 40/％ |
| Reference scheme 5 | 26.92 | 88.9 |
| Comparative scheme 6 | 27.78 | 87.0 |
| Comparative scheme 7 | 27.10 | 87.9 |
As can be seen from tables 4 and 5: in the reference scheme, the coal blending volatile content is 26.92 percent and is within 27 percent of the control range, and 6M dry quenching M of the coal blending volatile content is realized 40 88.9 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m 3 As required by the blast furnace.
(3) The fertilizer coal 2# and the fertilizer coal 3# are combined, the coking coal 1# and the coking coal 2# and the coking coal 3# are combined, the ratio of the fertilizer coal 2# to the coking coal 3# is 16-25%, and the ratio of the coking coal 1# to the coking coal 2# is 25-30%. The specific blending range of each coal is as follows:
TABLE 6 coal blending protocol
TABLE 7 coal blending volatiles and coke quality
| Scheme(s) | Blending coal volatile/percent | 6-meter dry coke quenching M 40/％ |
| Reference scheme 8 | 26.52 | 89.0 |
| Comparative scheme 9 | 27.09 | 87.0 |
| Comparative scheme 10 | 26.98 | 87.9 |
As can be seen from tables 6 and 7: in the reference scheme, the coal blending volatile content is 26.52 percent and is within 27 percent of the control range, and the 6-meter dry quenching M 40 89.0 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m 3 As required by the blast furnace.
(4) The fertilizer coal 2# and the fertilizer coal 4# are combined, the coking coal 1# and the coking coal 2# are combined with the coking coal 3# and the mixture ratio of the fertilizer coal 2# and the coking coal 4# is 15-20 percent and the mixture ratio of the coking coal 1# and the coking coal 2# is 25-30 percent. The specific blending range of each coal is as follows:
TABLE 8 coal blending protocol
TABLE 9 blending coal volatiles and coke quality
| Scheme(s) | Blending coal volatile/percent | 6M dry quenching coke M 40/％ |
| Reference scheme 11 | 26.98 | 88.7 |
| Comparative scheme 12 | 27.65 | 87.0 |
| Comparative scheme 13 | 26.96 | 87.8 |
From tables 8 and 9, it can be seen that: in the reference scheme, the coal blending volatile content is 26.98 percent and is within 27 percent of the control range, and 6M dry quenching M is adopted 40 88.7 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m 3 As required by the blast furnace.
(5) The fat coal is a combination of low-fluidity fat coal (fat coal 1# or fat coal 2 #) and high-fluidity fat coal (fat coal 3# or fat coal 4 #), the proportion is 20%, but the coking coal is a combination of coking coal 1#, coking coal 3# and coking coal 4#, or a combination of coking coal 2#, coking coal 3# and coking coal 4#. The specific blending range of each coal is as follows:
TABLE 10 coal blending protocol
TABLE 11 blending coal volatiles and coke quality
| Scheme(s) | Blending coal volatile/percent | 6M dry quenching coke M 40/％ |
| Reference scheme 14 | 26.77 | 88.9 |
| Comparative scheme 15 | 26.92 | 87.5 |
As can be seen from tables 10 and 11: in the reference scheme, the coal blending volatile content is 26.77 percent and is within 27 percent of the control range, and 6 meters of dry quenching M is adopted 40 88.9 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m 3 As required by the blast furnace.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (2)
1. A coal blending method for improving the crushing strength of coke is characterized in that gas coal, fat coal, 1/3 coking coal, coking coal and lean coal are selected as coal types, wherein: gas coal: g value >80; lean coal: a G value >30;
the fat coal is classified as follows:
fat coal 1#: vdaf:28 to 33 percent, Y value is more than 25mm, australia b value is less than or equal to 80 percent, and fluidity is less than or equal to 5000ddpm; fat coal 2#: vdaf: 28-33%, Y value is more than 25mm, australia b value is more than 80%, and fluidity is less than or equal to 5000ddpm; fat coal 3#: vdaf: 28-33%, Y value >25mm, olympic b value >80%, fluidity >5000ddpm; fat coal 4#: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000ddpm;
the 1/3 coking coal is classified as follows:
1/3 coking coal 1#: vdaf is less than or equal to 32 percent, G value is more than or equal to 85 percent, and fluidity is more than or equal to 1000ddpm;1/3 coking coal 2#: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000ddpm;
the coking coals are classified as follows:
1# of coking coal: vdaf: 18-28%, G value is more than or equal to 80, coarse grain inlay is more than or equal to 55%, and fluidity is more than or equal to 1000ddpm; coking coal 2#: vdaf: 18-28%, G value is more than or equal to 80, coarse grain inlay is more than or equal to 55%, and fluidity is less than 1000ddpm; 3# of coking coal: vdaf: 22-28%, G value is more than or equal to 80, coarse grains are inlaid in 48-55%, and fluidity is less than 1000ddpm; 4# of coking coal: vdaf: 18-22%, G value is more than or equal to 80, coarse grains are inlaid in 48-55%, and fluidity is less than 1000ddpm;
the coal blending method comprises the following steps: selecting the gas coal, the lean coal, the 1/3 coking coal 1#, the 1/3 coking coal 2#, the fat coal and the coking coal, wherein the fat coal is selected from any one of the following combinations: the coking coal comprises fat coal 1# and fat coal 3#, fat coal 1# and fat coal 4#, fat coal 2# and fat coal 3#, fat coal 2# and fat coal 4#, and the coking coal is selected from any one of the following combinations: coking coal 1# and coking coal 2# and coking coal 3#, coking coal 1# and coking coal 3# and coking coal 4#, coking coal 2# and coking coal 3# and coking coal 4#;
the coal blending combination and the blending ratio adopt any one of the following modes:
the method I comprises the following steps: the composition of fat coal 1# and fat coal 3# and the composition of coking coal 1#, coking coal 2# and coking coal 3#, wherein the ratio of the fat coal 1# + the fat coal 3# is not more than 25 percent, and the ratio of the coking coal 1# + the coking coal 2# is 25 to 30 percent;
the specific range of the first mode is as follows: gas coal: 8 to 15 percent; fat coal 1#:8% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10% -14%;
the second method comprises the following steps: the composition of fat coal 1# and fat coal 4# and the composition of coking coal 1#, coking coal 2# and coking coal 3#, wherein the ratio of the fat coal 1# + the fat coal 4# is not more than 20 percent, and the ratio of the coking coal 1# + the coking coal 2# is 25-30 percent;
the specific range of the second mode is as follows: gas coal: 8 to 12 percent; fat coal 1#:10% -15%; fat coal 4#:5% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10% -14%;
the third method comprises the following steps: the composition of fat coal No. 2 and fat coal No. 3, the composition of coking coal No. 1, coking coal No. 2 and coking coal No. 3, wherein the ratio of the fat coal No. 2+ the fat coal No. 3 is not more than 20%, and the ratio of the coking coal No. 1+ the coking coal No. 2 is 25-30%;
the specific range of the third mode is as follows: gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 3#:10% -15%; 1/3 coking coal 1#:5% -10%; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5% -15%, coking coal 2#:10% -25%, coking coal 3#:15% -20%; lean coal: 10% -14%;
the method is as follows: the composition of fat coal No. 2 and fat coal No. 4, the composition of coking coal No. 1, coking coal No. 2 and coking coal No. 3, wherein the mixture ratio of the fat coal No. 2 and the coking coal No. 4 is not more than 20 percent, and the mixture ratio of the coking coal No. 1 and the coking coal No. 2 is 25 to 30 percent;
the specific application range of the fourth mode is as follows: gas coal: 8 to 12 percent; fat coal 2#:5% -10%; fat coal 4#:8 to 13 percent; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5-15%, coking coal 2#:10% -25%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent;
the fifth mode is as follows: the fat coal is a combination of low-flow fat coal and high-flow fat coal, and the proportion of the fat coal is 20 percent; the coking coal is the combination of coking coal No. 1, coking coal No. 3 and coking coal No. 4, the mixture ratio of the coking coal No. 1 and the coking coal No. 4 is 25-30%, or the combination of the coking coal No. 2, the coking coal No. 3 and the coking coal No. 4, the mixture ratio of the coking coal No. 2 and the coking coal No. 4 is 25-30%; the low-flow fat coal is fat coal No. 1 or fat coal No. 2, and the high-flow fat coal is fat coal No. 3 or fat coal No. 4;
the concrete application range of the fifth mode is as follows:
when the coking coal adopts the combination of coking coal No. 1, coking coal No. 3 and coking coal No. 4, the gas coal: 8 to 12 percent; 20% of fat coal; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; 1# of coking coal: 5-15%, coking coal 4#:10% -20%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent;
when the coking coal adopts the combination of coking coal No. 2, coking coal No. 3 and coking coal No. 4, the gas coal: 8 to 12 percent; 20% of fat coal; 1/3 coking coal 1#:5 to 10 percent; 1/3 coking coal 2#:0 to 5 percent; coking coal 2#: 5-15%, coking coal 4#:10% -20%, coking coal 3#:15 to 20 percent; lean coal: 10 to 14 percent.
2. The coal blending method for improving coke crushing strength according to claim 1, wherein each coal blending satisfies the following requirements: the volatile component Vdaf is less than 27 percent, the G value is 79-83, and the Y value is 15-17 mm.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07268348A (en) * | 1994-03-30 | 1995-10-17 | Nippon Steel Corp | Production of coke for blast furnace |
| AU2007350817A1 (en) * | 2007-04-10 | 2008-10-16 | Boris Musokhranov | Mixture of minerals and fluxes for obtaining metallurgical coke (variants) |
| WO2009030064A1 (en) * | 2007-09-03 | 2009-03-12 | Shutong Dong | A process for non-coke smelting iron and steel |
| CN102492448A (en) * | 2011-12-12 | 2012-06-13 | 武汉钢铁(集团)公司 | Coal blending coking method capable of controlling quality of coking coal |
| CN102517060A (en) * | 2011-12-15 | 2012-06-27 | 武汉钢铁(集团)公司 | Outer Mongolia coking coal-participant coking coal blending method |
| CN105112083A (en) * | 2015-08-20 | 2015-12-02 | 河北钢铁股份有限公司邯郸分公司 | Method for high-volatile coking coal blending |
| 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 |
| CN110746997A (en) * | 2019-10-29 | 2020-02-04 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111621314A (en) * | 2020-06-11 | 2020-09-04 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5390977B2 (en) * | 2009-07-31 | 2014-01-15 | 株式会社神戸製鋼所 | Iron ore-containing coke and method for producing the iron ore-containing coke |
| CN102533299B (en) * | 2011-12-15 | 2014-01-01 | 武汉钢铁(集团)公司 | Russian fat coal participant coking and coal blending method |
| 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 |
| CN102676191B (en) * | 2012-05-23 | 2014-03-05 | 武汉钢铁(集团)公司 | Method for sorting coking coal with 32-37% volatile component and coking blending method |
-
2022
- 2022-03-28 CN CN202210314276.1A patent/CN114507536B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07268348A (en) * | 1994-03-30 | 1995-10-17 | Nippon Steel Corp | Production of coke for blast furnace |
| AU2007350817A1 (en) * | 2007-04-10 | 2008-10-16 | Boris Musokhranov | Mixture of minerals and fluxes for obtaining metallurgical coke (variants) |
| WO2009030064A1 (en) * | 2007-09-03 | 2009-03-12 | Shutong Dong | A process for non-coke smelting iron and steel |
| CN102492448A (en) * | 2011-12-12 | 2012-06-13 | 武汉钢铁(集团)公司 | Coal blending coking method capable of controlling quality of coking coal |
| CN102517060A (en) * | 2011-12-15 | 2012-06-27 | 武汉钢铁(集团)公司 | Outer Mongolia coking coal-participant coking coal blending method |
| CN105112083A (en) * | 2015-08-20 | 2015-12-02 | 河北钢铁股份有限公司邯郸分公司 | Method for high-volatile coking coal blending |
| 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 |
| CN110746997A (en) * | 2019-10-29 | 2020-02-04 | 武汉钢铁有限公司 | Method for refining metallurgical coke |
| CN111621314A (en) * | 2020-06-11 | 2020-09-04 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
Non-Patent Citations (1)
| Title |
|---|
| 攀钢配加气煤和瘦煤炼焦试验;黄先佑等;《中国冶金》;20191215(第12期);第55-58页 * |
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