CN114507536A - 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 method comprises the following steps of 1# fat coal and 3#, 1# fat coal and 4#, 2# fat coal and 3#, 2# fat coal and 4#, wherein 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 M40>88.5 percent, and the coke mass satisfies 3000m3As 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 the blast furnace, the coke quality requirement of iron and steel enterprises is improved year by year, but high-quality coking coal resources are reduced year by year, so that the coking coal resources are necessary to be further reasonably matched in limited resources, and the coke quality is improved by optimizing the 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 5000ddpm), 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 M40>88.5 percent, and the coke mass satisfies 3000m3As 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: 28-33%, Y value is more than 25mm, Australia b value is less than or equal to 80%, and fluidity is less than or equal to 5000 ddpm; 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 5000 ddpm; fat coal 3 #: vdaf: 28-33%, Y value is more than 25mm, Olympic b value is more than 80%, fluidity is more than 5000 ddpm; fat coal 4 #: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000 ddpm;
1/3 coking coals are 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 1000 ddpm; 1/3 coking coal 2 #: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000 ddpm;
the coking coals are classified as follows:
1# of coking coal: vdaf: 18-28%; 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 1000 ddpm; coking coal 2 #: vdaf: 18-28%; 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 1000 ddpm; 3# of coking coal: vdaf: 22-28%; the G value is more than or equal to 80, the coarse grains are inlaid in 48-55%, and the fluidity is less than 1000 ddpm; 4# of coking coal: vdaf: 18-22%; the G value is more than or equal to 80, the coarse grains are inlaid in 48-55%, and the fluidity is less than 1000 ddpm;
the coal blending method comprises the following steps: selecting the gas coal, the lean coal, 1/3 coking coal 1#, 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 fat coal 1# has low fluidity and low expansion degree, can not play a role of fat coal when being used alone, particularly when the blending proportion of gas coal and lean coal reaches more than 20%, the fat coal 1# is blended alone, the coke crushing strength is low, so the fat coal 3# with better quality is combined with the fat coal 3# for use, the blending proportion of the fat coal 1# and the fat coal 3# is 18-25%, the blending proportion is low, and because of the weak caking coal (gas coal and lean coal) with more than 20%, the wear resistance is reduced, the blending ratio is high, the coke bubbles are more, and the matrix strength is damaged. The coking coal quality also has obvious influence on the coke crushing strength, the coking coal 1# and the coking coal 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 1# to the coking coal 2# is 25 to 30 percent, and in addition, the coking coal 3# with inferior coking property in a certain proportion is blended;
the specific blending range of each coal is as follows:
gas coal: 8-15%; 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 a colloidal body, and is combined with the low-mobility fertilizer coal No. 1 to improve the mobility of the fertilizer coal and enhance the viscosity of the colloidal body, so that 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 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 fat coal 3# to promote the coking of the fat coal and other coking coals, and the crushing strength of coke is improved, but the ratio of the fat coal 2# to the fat coal 3# is not more than 20%, the ratio of the coking coal 1# to the coking coal 2# is combined with the coking coal 3# 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:
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, 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 is combined with the coke 3, the ratio of the fertilizer 2 to the fertilizer 4 is not more than 20 percent, and the ratio of the coke 1 to the coke 2# is 25-30 percent;
the specific blending range of each coal is as follows:
gas coal: 8-12%; fat coal 2 #: 5% -10%; fat coal 4 #: 8-13%; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; 1# of coking coal: 5-15%, and 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-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: 5-15% of coke 1 (coke 2) and coke 4# in a proportion of 25-30%. 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: 8-12%; 20% of fertilizer; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; 1# of coking coal: 5-15%, and coking coal 4 #: 10% -20%, coking coal 3 #: 15-20%; 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: 8-12%; 20% of fertilizer; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; coking coal 2 #: 5-15%, and coking coal 4 #: 10% -20%, coking coal 3 #: 15-20%; lean coal: 10 to 14 percent.
More preferably, the low fluidity rich coal is fat coal # 1 or fat coal # 2, and the high fluidity rich coal is fat coal # 3 or fat coal # 4.
Further preferably, each blending coal should satisfy: the volatile component Vdaf is less than 27%, 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 M40>88.5 percent, and the coke mass satisfies 3000m3As 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 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: 28-33%, Y value is more than 25mm, Australia b value is less than or equal to 80%, and fluidity is less than or equal to 5000 ddpm;
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 5000 ddpm;
fat coal 3 #: vdaf: 28-33%, Y value is more than 25mm, Olympic b value is more than 80%, fluidity is more than 5000 ddpm;
fat coal 4 #: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000 ddpm;
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 1000 ddpm;
1/3 coking coal 2 #: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000 ddpm;
1/3 coking coal is a common coal for coking, and high-quality 1/3 coking coal also has certain fluidity, such as 1/3 coking coal No. 1, supports coke strength, and the blending proportion can be higher, but 1/3 coking coal with fluidity lower than 1000ddpm does not support coke strength enough, and can only be used in limited quantity.
Coking coal
1# of coking coal: vdaf: 18-28%; 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 1000 ddpm;
coking coal 2 #: vdaf: 18-28%; 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 1000 ddpm;
3# of coking coal: vdaf: 22-28%; the G value is more than or equal to 80, the coarse grains are inlaid in 48-55%, and the fluidity is less than 1000 ddpm;
4# of coking coal: vdaf: 18-22%; the G value is more than or equal to 80, the coarse grains are embedded in 48-55%, and the fluidity is less than 1000 ddpm;
lean coal: the G value is > 30. (the patent requires that the crushing strength of coke reaches over 88.5 percent, the requirement is high, the dosage of the lean coal is over 10 percent, the dosage is higher than the domestic industry level, the low G value and the lean coal are high in blending, the influence on the coke strength is obvious, and the crushing strength requirement of the patent can not 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 the fat coal 1# and the fat coal 3# is combined, the composition of the coking coal 1#, the coking coal 2# and the coking coal 3# is combined, the mixture ratio of the fat coal 1# + the coking coal 3# is not more than 25%, and the mixture ratio of the coking coal 1# + the coking coal 2# is 25-30%. The specific blending range of each coal is as follows:
gas coal: 8-12%; 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% -20%; lean coal: 13 to 14 percent.
(2) The composition of the fat coal 1# and the fat coal 4# is combined, the composition of the coking coal 1#, the coking coal 2# and the coking coal 3# is combined, the mixture ratio of the fat coal 1# + the coking coal 4# is not more than 20%, and the mixture ratio of the coking coal 1# + the coking coal 2# is 25-30%. 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 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 mixture ratio of the fat coal No. 2+ the coking coal No. 3 is not more than 20%, and the mixture 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 #: 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: 8-12%; fat coal 2 #: 5% -10%; fat coal 4 #: 8-13%; 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 a low-flow fat coal (fat coal 1# or fat coal 2#) and 8-12% of a 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#, and the specific blending range of the coking coal 1# (coking coal 2#) and the coking coal 4# is 25-30% of each coal type as follows:
gas coal: 8-12%; 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 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; 1# of coking coal: 5-15%, and coking coal 4 #: 10% -20%, coking coal 3 #: 10-20%; lean coal: 13 to 14 percent.
The volatile components Vdaf of the above blended coal<27.00%, a G value of 79-83%, and a Y value of 15-17 mm. The method is characterized in that rich coal with different qualities and coking coal with different qualities are optimally combined and reasonably matched. The coke is coked by a top-charging coke oven with the length of 6M or more, and the obtained dry quenched coke M40>88.5 percent, and the coke mass satisfies 3000m3As required by the blast furnace.
Example (b):
step 1: the analytical data of the coal quality of various coals are shown in table 1, wherein the analytical data of the coal quality of certain coking plants include 1# coking coal, 2# coking coal, 3# coking coal, 4# coking coal, 1# 1/3 coking coal, 2# 1/3 coking coal, gas coal, 1# fat coal, 2# fat coal, 3# fat coal, 4# fat coal and lean coal.
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 step 3: different resource structure combinations and different coal blending structures.
(1) The method comprises the following steps of combining fat coal 1# and fat coal 3#, and combining coking coal 1#, coking coal 2# and coking coal 3#, wherein the proportion of the fat coal 1# + the proportion of the fat coal 3# is 17-25%, and the proportion of the coking coal 1# + the proportion of 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 M40/％ |
| 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 adopted4089.0 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m3As required by the blast furnace.
(2) The method comprises the following steps of combining fat coal 1# and fat coal 4#, and combining coking coal 1#, coking coal 2# and coking coal 3#, wherein the proportion of the fat coal 1# + the proportion of the fat coal 4# is 16-20%, and the proportion of the coking coal 1# + the proportion of the coking coal 2# is 25-30%. 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 M40/％ |
| Reference scheme 5 | 26.92 | 88.9 |
| Comparative scheme 6 | 27.78 | 87.0 |
| Comparative scheme 7 | 27.10 | 87.9 |
From tables 4 and 5, it can be seen that: 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 realized4088.9 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m3As required by the blast furnace.
(3) The method comprises the following steps of combining fat coal No. 2 with fat coal No. 3, combining coking coal No. 1, coking coal No. 2 with coking coal No. 3, wherein the proportion of the fat coal No. 2+ the proportion of the fat coal No. 3 is 16-25%, and the proportion of the coking coal No. 1+ the proportion of the coking coal No. 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 M40/％ |
| Reference scheme 8 | 26.52 | 89.0 |
| Comparative scheme 9 | 27.09 | 87.0 |
| Comparative scheme 10 | 26.98 | 87.9 |
From tables 6 and 7, it can be seen that: 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 M4089.0 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m3As 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# in a ratio of 15% -20% for the fertilizer coal 2# and the coking coal 1# and the coking coal 2# and 25% -30% for the same. 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 M40/％ |
| 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 adopted4088.7 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m3As required by the blast furnace.
(5) The fat coal is a combination of low-flow fat coal (fat coal 1# or fat coal 2#) and high-flow fat coal (fat coal 3# or fat coal 4#), and 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 M40/％ |
| 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 adopted4088.9 percent, the coke quality is better than that of a comparison scheme, and can meet 3000m3As required by the blast furnace.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
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: 28-33%, Y value is more than 25mm, Australia b value is less than or equal to 80%, and fluidity is less than or equal to 5000 ddpm; 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 5000 ddpm; fat coal 3 #: vdaf: 28-33%, Y value is more than 25mm, Olympic b value is more than 80%, fluidity is more than 5000 ddpm; fat coal No. 4: vdaf: 33-36%, Y value is more than 25mm, and fluidity is more than or equal to 10000 ddpm;
1/3 coking coals are 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 1000 ddpm; 1/3 coking coal 2 #: vdaf is less than or equal to 32 percent, and the fluidity is less than 1000 ddpm;
the coking coals are classified as follows:
1# of coking coal: vdaf: 18-28%; 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 1000 ddpm; coking coal 2 #: vdaf: 18-28%; 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 1000 ddpm; 3# of coking coal: vdaf: 22-28%; the G value is more than or equal to 80, the coarse grains are inlaid in 48-55%, and the fluidity is less than 1000 ddpm; 4# of coking coal: vdaf: 18-22%; the G value is more than or equal to 80, the coarse grains are inlaid in 48-55%, and the fluidity is less than 1000 ddpm;
the coal blending method comprises the following steps: selecting the gas coal, the lean coal, 1/3 coking coal 1#, 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.
2. The coal blending method for improving the crushing strength of the coke according to claim 1, wherein the coal blending method comprises the following steps: the method comprises the following steps of combining fat coal 1# and fat coal 3#, and combining 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%, and the ratio of the coking coal 1# + the coking coal 2# is 25-30%;
the specific blending range of each coal is as follows:
gas coal: 8-15%; 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.
3. The coal blending method for improving the crushing strength of the coke according to claim 1, which is characterized in that the coal blending method comprises the following steps: the method comprises the following steps of combining fat coal 1# and fat coal 4# and combining 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%, and the ratio of the coking coal 1# + the coking coal 2# is 25-30%;
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.
4. The coal blending method for improving the crushing strength of the coke according to claim 1, which is characterized in that the coal blending method comprises the following steps: the method comprises the following steps of combining fat coal No. 2 with fat coal No. 3, and combining coking coal No. 1, coking coal No. 2 and coking coal No. 3, wherein the ratio of the fat coal No. 2 to the coking coal No. 3 is not more than 20%, and the ratio of the coking coal No. 1 to 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.
5. The coal blending method for improving the crushing strength of the coke according to claim 1, which is characterized in that the coal blending method comprises the following steps: the method comprises the following steps of combining fat coal No. 2 with fat coal No. 4, and combining coking coal No. 1, coking coal No. 2 and coking coal No. 3, wherein the ratio of the fat coal No. 2 to the fat coal No. 4 is not more than 20%, and the ratio of the coking coal No. 1 to the coking coal No. 2 is 25-30%;
the specific blending range of each coal is as follows:
gas coal: 8-12%; fat coal 2 #: 5% -10%; fat coal 4 #: 8-13%; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; 1# of coking coal: 5-15%, and coking coal 2 #: 10% -25%, coking coal 3 #: 15-20%; lean coal: 10 to 14 percent.
6. The coal blending method for improving the crushing strength of the coke according to claim 1, which is characterized in that the coal blending method comprises the following steps: the rich coal is a combination of low-flow rich coal and high-flow rich coal, and the proportion of the rich 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 to 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 to the coking coal No. 4 is 25-30%;
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: 8-12%; 20% of fertilizer; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; 1# of coking coal: 5-15%, and coking coal 4 #: 10% -20%, coking coal 3 #: 15-20%; 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: 8-12%; 20% of fertilizer; 1/3 coking coal 1 #: 5-10%; 1/3 coking coal 2 #: 0 to 5 percent; coking coal 2 #: 5-15%, and coking coal 4 #: 10% -20%, coking coal 3 #: 15-20%; lean coal: 10 to 14 percent.
7. The coal blending method for improving coke crushing strength according to claim 6, wherein 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.
8. The coal blending method for improving coke crushing strength according to any one of claims 1 to 7, wherein each coal blending satisfies the following requirements: the volatile component Vdaf is less than 27%, the G value is 79-83, and the Y value is 15-17 mm.
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Citations (13)
| 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 |
| JP2011032370A (en) * | 2009-07-31 | 2011-02-17 | Kobe Steel Ltd | Iron ore-containing coke and method for producing the iron ore-containing coke |
| 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 |
| CN102533299A (en) * | 2011-12-15 | 2012-07-04 | 武汉钢铁(集团)公司 | Russian fat coal participant coking and coal blending method |
| CN102676191A (en) * | 2012-05-23 | 2012-09-19 | 武汉钢铁(集团)公司 | Method for sorting coking coal with 32-37% volatile component and coking blending method |
| CN102690669A (en) * | 2012-05-23 | 2012-09-26 | 武汉钢铁(集团)公司 | Coking coal quality classification method and coal blending and coking method with participation of coking coal |
| 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 |
-
2022
- 2022-03-28 CN CN202210314276.1A patent/CN114507536B/en active Active
Patent Citations (13)
| 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 |
| JP2011032370A (en) * | 2009-07-31 | 2011-02-17 | Kobe Steel Ltd | Iron ore-containing coke and method for producing the iron ore-containing coke |
| 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 |
| CN102533299A (en) * | 2011-12-15 | 2012-07-04 | 武汉钢铁(集团)公司 | Russian fat coal participant coking and coal blending method |
| CN102676191A (en) * | 2012-05-23 | 2012-09-19 | 武汉钢铁(集团)公司 | Method for sorting coking coal with 32-37% volatile component and coking blending method |
| CN102690669A (en) * | 2012-05-23 | 2012-09-26 | 武汉钢铁(集团)公司 | Coking coal quality classification method and coal blending and coking method with participation of coking coal |
| 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 |
|---|
| 黄先佑等: "攀钢配加气煤和瘦煤炼焦试验", 《中国冶金》 * |
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