CN113755192B - Coal blending method for coal in furnace and coal in furnace - Google Patents
Coal blending method for coal in furnace and coal in furnace Download PDFInfo
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- CN113755192B CN113755192B CN202110699867.0A CN202110699867A CN113755192B CN 113755192 B CN113755192 B CN 113755192B CN 202110699867 A CN202110699867 A CN 202110699867A CN 113755192 B CN113755192 B CN 113755192B
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- 239000003245 coal Substances 0.000 title claims abstract description 179
- 238000002156 mixing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004939 coking Methods 0.000 claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 239000002981 blocking agent Substances 0.000 claims abstract description 25
- 239000012749 thinning agent Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 24
- 239000011593 sulfur Substances 0.000 claims description 24
- 229910052717 sulfur Inorganic materials 0.000 claims description 24
- 239000002956 ash Substances 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000010883 coal ash Substances 0.000 claims description 8
- YZTBCHFJLOBMCH-UHFFFAOYSA-N 2-[bis(2-hydroxyethyl)amino]ethanol molybdenum Chemical compound [Mo].N(CCO)(CCO)CCO YZTBCHFJLOBMCH-UHFFFAOYSA-N 0.000 claims description 6
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- 239000002008 calcined petroleum coke Substances 0.000 claims description 6
- 239000004021 humic acid Substances 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 abstract description 25
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 17
- 239000013068 control sample Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to the technical field of coal blending methods of coal in a furnace, in particular to a coal blending method of coal in a furnace and coal in a furnace; the method comprises the following steps: selecting coking coal, fat coal, lean coal, a blocking agent, a binder and a lean agent, and blending the following materials in percentage by weight: 50-65 parts of coking coal, 5-15 parts of fat coal, 5-15 parts of lean coal, 5-15 parts of blocking agent, 1-5 parts of binder and 4-8 parts of thinning agent; the coal blending method for feeding the coal into the furnace solves the technical problems in the prior art that in order to reduce the cost, a large amount of low-quality raw materials such as coke powder, lean coal or non-caking coal and the like are blended in the conventional formed coke production process, so that the coal blending cost can be effectively reduced, but the volatile matters and the coke strength are low.
Description
Technical Field
The invention relates to the technical field of coal blending methods of coal in a furnace, in particular to a coal blending method of coal in a furnace and the coal in the furnace.
Background
Coke is one of the important raw materials for blast furnace ironmaking. With the enlargement of blast furnaces and the increase of coal injection quantity, the requirements on the quality index of the coke are higher and higher. The coke quality index includes indexes such as chemical industry components (Ad%, st, d%, vdaf), cold strength (M40%, M10%), thermal performance (CRI, CSR%) and blockiness, wherein the cold strength index M10% is the wear resistance of the coke. Production practice shows that the wear resistance M10 of the coke is improved by 0.2%, the coke ratio is reduced by 7%, the iron yield is increased by 5.0%, and the influence degree on the blast furnace production is far greater than that of other coke quality indexes.
Conventional foundry coke production requires adding fat coal, 1/3 coking coal and the likeHigh-quality raw materials and high cost, and the density of the coal cake can only reach 1.05g/cm by tamping 3 About, low reactivity, and the like. In order to reduce the cost, a large amount of low-quality raw materials such as coke powder, lean coal or non-caking coal and the like are added in the conventional formed coke production process, so that the cost of coal blending can be effectively reduced, but the volatile matters and the coke strength are low.
Accordingly, in view of the above problems, there is an urgent need for a coal blending method for charging coal and charging coal.
Disclosure of Invention
The invention aims to provide a coal blending method of coal in a furnace, which solves the technical problems in the prior art that in order to reduce the cost, a large amount of low-quality raw materials such as coke powder, lean coal or non-caking coal and the like are blended in the conventional formed coke production process, so that the coal blending cost can be effectively reduced, but the volatile matters and the coke strength are low.
The invention provides a coal blending method of coal into a furnace, which comprises the following steps:
1) Selecting coking coal, fat coal, lean coal, a blocking agent, a binder and a thinning agent, wherein,
the coking coal ash Ad% is 7.5, the volatile Vadf% is 17.5, the total sulfur Std% is 0.50, the coal G value is 75, and the coal Y value is 16;
ash Ad% of fat coal is 9.0, volatile Vadf% is 25, total sulfur Std% is 0.60, coal G value is 88, and coal Y value is 28;
ash Ad% of the blocking agent is 6.8, volatile Vadf% is 1.5, total sulfur Std% is 0.64;
the lean coal ash Ad% is 7.5, the volatile Vadf% is 14, the total sulfur Std% is 2.0, the coal G value is 40, and the coal Y value is 4;
ash Ad% of the binder is 0.2, volatile Vadf% is 55, total sulfur Std% is 0.60;
ash Ad% of lean agent 11.5, volatile Vadf% 1.5, total sulfur Std% 0.7;
2) Blending coal according to the following weight percentage: 50-65 parts of coking coal, 5-15 parts of fat coal, 5-15 parts of lean coal, 5-15 parts of blocking agent, 1-5 parts of binder and 4-8 parts of thinning agent.
Preferably, coal is blended according to the following weight percentages: 57-63 parts of coking coal, 7-13 parts of fat coal, 7-13 parts of lean coal, 7-13 parts of blocking agent, 1-4 parts of binder and 5-8 parts of thinning agent.
Preferably, coal is blended according to the following weight percentages: 60-62 parts of coking coal, 10-12 parts of fat coal, 10-12 parts of lean coal, 10-12 parts of blocking agent, 3-4 parts of binder and 6-8 parts of thinning agent.
Preferably, coal is blended according to the following weight percentages: 60 parts of coking coal, 10 parts of fat coal, 10 parts of lean coal, 10 parts of caking agent, 4 parts of binder and 6 parts of thinning agent.
Preferably, the binder is asphalt.
Preferably, the attenuation agent is coke breeze.
Preferably, the blocking agent is a mixture of boric acid, calcined petroleum coke powder, titanium dioxide, molybdenum triethanolamine and humic acid; the mass ratio of boric acid to calcined petroleum coke powder to titanium dioxide to triethanolamine molybdenum to humic acid is 1:2:3:5:1.
Preferably, the coking coal has a particle size of less than 3mm; the granularity of the fat coal is less than 3mm; the granularity of the lean coal is less than 3mm.
The invention also provides the coal-in-furnace obtained by the coal-in-furnace blending method based on any one of the above.
Preferably, the M40 of the coal being charged is greater than 90, M10 is less than 9, and csr is greater than 66.4.
Compared with the prior art, the coal blending method for the coal in the furnace and the coal in the furnace provided by the invention have the following steps:
1. according to the method for blending the coal into the furnace, the configuration of the magnesium into the furnace can be directly carried out according to the method for blending the coal into the furnace, so that the cast coke lump size, strength and yield are improved, the cast coke blending cost is reduced, and the profit of enterprises is improved.
2. According to the method for blending the coal into the furnace, the matching point of the maximum block growth point and the impact point with minimum thermal strength can be continuously searched through proportioning adjustment and combination, so that the win-win goal of large block and high strength is realized.
3. The obtained coal is sintered to obtain high coke strength.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a coal blending method of coal into a furnace, which comprises the following steps:
s101) selecting coking coal, fat coal, lean coal, a blocking agent, a binder and a thinning agent, wherein,
the coking coal ash Ad% is 7.5, the volatile Vadf% is 17.5, the total sulfur Std% is 0.50, the coal G value is 75, and the coal Y value is 16;
ash Ad% of fat coal is 9.0, volatile Vadf% is 25, total sulfur Std% is 0.60, coal G value is 88, and coal Y value is 28;
ash Ad% of the blocking agent is 6.8, volatile Vadf% is 1.5, total sulfur Std% is 0.64;
the lean coal ash Ad% is 7.5, the volatile Vadf% is 14, the total sulfur Std% is 2.0, the coal G value is 40, and the coal Y value is 4;
ash Ad% of the binder is 0.2, volatile Vadf% is 55, total sulfur Std% is 0.60;
ash Ad% of lean agent 11.5, volatile Vadf% 1.5, total sulfur Std% 0.7;
s102) blending coal according to the following weight percentage: 50-65 parts of coking coal, 5-15 parts of fat coal, 5-15 parts of lean coal, 5-15 parts of blocking agent, 1-5 parts of binder and 4-8 parts of thinning agent.
Specifically, coal is blended according to the following weight percentage: 57-63 parts of coking coal, 7-13 parts of fat coal, 7-13 parts of lean coal, 7-13 parts of blocking agent, 1-4 parts of binder and 5-8 parts of thinning agent.
Specifically, coal is blended according to the following weight percentage: 60-62 parts of coking coal, 10-12 parts of fat coal, 10-12 parts of lean coal, 10-12 parts of blocking agent, 3-4 parts of binder and 6-8 parts of thinning agent.
Specifically, coal is blended according to the following weight percentage: 60 parts of coking coal, 10 parts of fat coal, 10 parts of lean coal, 10 parts of caking agent, 4 parts of binder and 6 parts of thinning agent.
Specifically, the binder is asphalt.
Specifically, the thinning agent is coke powder.
Specifically, the blocking agent is a mixture of boric acid, calcined petroleum coke powder, titanium dioxide, triethanolamine molybdenum and humic acid; the mass ratio of boric acid to calcined petroleum coke powder to titanium dioxide to triethanolamine molybdenum to humic acid is 1:2:3:5:1.
Specifically, the granularity of the coking coal is less than 3mm; the granularity of the fat coal is less than 3mm; the granularity of the lean coal is less than 3mm.
The invention also provides the coal-in-furnace obtained by the coal-in-furnace blending method based on any one of the above.
Specifically, M40 of the coal entering the furnace is more than 90, M10 is less than 9, and CSR is more than 66.4.
According to the invention, by adding fat coal, lean coal, a blocking agent, a binder and a thinning agent into coking coal, the mass of the coking coal, the fat coal, the lean coal, the blocking agent, the binder and the thinning agent is fixed, and the high volatile and coke strength is obtained through reasonable proportioning, so that the cost of casting coke blending is reduced, and the profit of enterprises is improved.
Example 1
Selecting coking coal, fat coal, lean coal, a blocking agent, a binder and a thinning agent, wherein,
the coking coal ash Ad% is 7.5, the volatile Vadf% is 17.5, the total sulfur Std% is 0.50, the coal G value is 75, and the coal Y value is 16;
ash Ad% of fat coal is 9.0, volatile Vadf% is 25, total sulfur Std% is 0.60, coal G value is 88, and coal Y value is 28;
ash Ad% of the blocking agent is 6.8, volatile Vadf% is 1.5, total sulfur Std% is 0.64;
the lean coal ash Ad% is 7.5, the volatile Vadf% is 14, the total sulfur Std% is 2.0, the coal G value is 40, and the coal Y value is 4;
ash Ad% of the binder is 0.2, volatile Vadf% is 55, total sulfur Std% is 0.60;
ash Ad% of lean agent 11.5, volatile Vadf% 1.5, total sulfur Std% 0.7;
sample 1 was prepared by blending, for example, the weight percent coal: 60 parts of coking coal, 10 parts of fat coal, 10 parts of lean coal, 10 parts of caking agent, 4 parts of binder and 6 parts of thinning agent, wherein the quality index of the obtained sample 1 is shown in table 1, and the quality index of the obtained coke is shown in table 2.
The quality index of the raw materials of the control sample 1 and the control sample 2 is the same as that of the raw materials of the sample 1,
control 1 was blended as follows by weight percent: 86 parts of coking coal, 6 parts of lean coal, 4 parts of binder and 4 parts of thinning agent, wherein the quality index of the obtained sample 1 is shown in table 1, and the quality index of the obtained coke is shown in table 2.
Control 2 was blended as follows by weight percent: 80 parts of fat coal, 10 parts of lean coal and 10 parts of blocking agent, wherein the quality index of the obtained sample 2 is shown in table 1, and the quality index of the obtained coke is shown in table 2.
Example two
Sample 2 is prepared by preparing sample 2 with the same quality index as that of sample 1, and blending coal according to the following weight percentages: 50 parts of coking coal, 15 parts of fat coal, 15 parts of lean coal, 10 parts of caking agent, 5 parts of binder and 5 parts of thinning agent, wherein the quality index of the obtained sample 2 is shown in table 1, and the quality index of the obtained coke is shown in table 2.
As can be seen from table 1, compared with control 1 and control 2, the quality index of sample 1 and sample 2 is better than that of control 1 and control 2, M40 is greater than 90, and M10 is less than 9; CSR is greater than 66.4.
Compared with sample 2, sample 1 is better than sample 2, and the mixture ratio of sample 1 can be selected to prepare the coal into the furnace.
TABLE 1 quality index of coal fired
| Name of the name | Ad％ | Vdaf％ | St,d％ | G | Y |
| Control 1 | 7.5 | 16.5 | 0.6 | 65 | 14 |
| Control sample 2 | 8.5 | 22.0 | 0.7 | 74 | 22 |
| Sample 1 | 7.5 | 16.5 | 0.6 | 62 | 13 |
| Sample 2 | 7.5 | 17.5 | 0.65 | 60 | 12.5 |
TABLE 2 Coke quality index
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. A coal blending method of coal in a furnace is characterized in that: the method comprises the following steps:
1) Selecting coking coal, fat coal, lean coal, a blocking agent, a binder and a thinning agent, wherein,
the coking coal ash Ad% is 7.5, the volatile Vadf% is 17.5, the total sulfur Std% is 0.50, the coal G value is 75, and the coal Y value is 16;
ash Ad% of fat coal is 9.0, volatile Vadf% is 25, total sulfur Std% is 0.60, coal G value is 88, and coal Y value is 28;
ash Ad% of the blocking agent is 6.8, volatile Vadf% is 1.5, total sulfur Std% is 0.64;
the lean coal ash Ad% is 7.5, the volatile Vadf% is 14, the total sulfur Std% is 2.0, the coal G value is 40, and the coal Y value is 4;
ash Ad% of the binder is 0.2, volatile Vadf% is 55, total sulfur Std% is 0.60;
ash Ad% of lean agent 11.5, volatile Vadf% 1.5, total sulfur Std% 0.7;
2) Blending coal according to the following weight percentage: 50-65 parts of coking coal, 5-15 parts of fat coal, 5-15 parts of lean coal, 5-15 parts of blocking agent, 1-5 parts of binder and 4-8 parts of thinning agent;
the blocking agent is a mixture of boric acid, calcined petroleum coke powder, titanium dioxide, triethanolamine molybdenum and humic acid; boric acid, calcined petroleum coke powder, titanium dioxide, triethanolamine molybdenum and humic acid in a mass ratio of 1:2:3:5:1;
the granularity of the coking coal is less than 3mm; the granularity of the fat coal is less than 3mm; the granularity of the lean coal is less than 3mm;
the binder is asphalt;
the thinning agent is coke powder.
2. The method for blending coal as claimed in claim 1, wherein: blending coal according to the following weight percentage: 57-63 parts of coking coal, 7-13 parts of fat coal, 7-13 parts of lean coal, 7-13 parts of blocking agent, 1-4 parts of binder and 5-8 parts of thinning agent.
3. The method for blending coal as claimed in claim 2, wherein: blending coal according to the following weight percentage: 60-62 parts of coking coal, 10-12 parts of fat coal, 10-12 parts of lean coal, 10-12 parts of blocking agent, 3-4 parts of binder and 6-8 parts of thinning agent.
4. A method of blending coal as claimed in claim 3, wherein: blending coal according to the following weight percentage: 60 parts of coking coal, 10 parts of fat coal, 10 parts of lean coal, 10 parts of caking agent, 4 parts of binder and 6 parts of thinning agent.
5. A coal-in-furnace obtained based on the coal-in-furnace blending method of any one of claims 1 to 4.
6. The coal charge of claim 5, wherein: the M40 of the coal entering the furnace is more than 90, the M10 is less than 9, and the CSR is more than 66.4.
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