CN113322092A - Preparation method of low-ash high-strength coke - Google Patents
Preparation method of low-ash high-strength coke Download PDFInfo
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- CN113322092A CN113322092A CN202110760233.1A CN202110760233A CN113322092A CN 113322092 A CN113322092 A CN 113322092A CN 202110760233 A CN202110760233 A CN 202110760233A CN 113322092 A CN113322092 A CN 113322092A
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- coal
- coke
- low
- ash
- long flame
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- 239000000571 coke Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003245 coal Substances 0.000 claims abstract description 69
- 239000002802 bituminous coal Substances 0.000 claims abstract description 23
- 239000011280 coal tar Substances 0.000 claims abstract description 22
- 238000000197 pyrolysis Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000003763 carbonization Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 4
- 239000004484 Briquette Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims 1
- 238000004939 coking Methods 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 6
- 239000003337 fertilizer Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005406 washing 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
- C10B57/045—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing mineral oils, bitumen, tar or the like or mixtures thereof
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 discloses a preparation method of low-ash high-strength coke, which comprises the following components in percentage by weight: 35-50% of long flame coal, 35-50% of bituminous coal and 7-15% of coal tar, wherein: and the long flame coal is subjected to dry distillation treatment, and the particle size of the long flame coal is less than 1 mm. According to the invention, dry-carbonized long-flame coal, bituminous coal with a caking index larger than 65 and a certain amount of coal tar are mixed according to a proportion, and then are made into high-pressure briquettes under high-strength pressure, and then the high-pressure briquettes are sent into a coke oven for conventional carbonization, so that coke with low ash content and high strength is obtained; because the long flame coal after dry distillation is added as the blending coal of the coke, the ash content of the metallurgical coke is reduced; the types of conventional blended coal such as gas, fertilizer, coke and lean coal are reduced, and the raw material preparation of coking coal is simplified; the large amount of low-rank coal is used, so that the production cost of metallurgical coke can be reduced; the use of low-ash high-strength coke can reduce the energy consumption of the blast furnace.
Description
Technical Field
The invention relates to the technical field of coal processing, in particular to a preparation method of low-ash high-strength coke.
Background
The raw materials of the internal refining coke are mainly prepared from four major coal ingredients of gas, fertilizer, coke and thin coal, the ash content in the coal is reduced by coal washing, and the coal is used, because high-quality coal is poor, the ash content of the domestic first-level metallurgical coke is regulated to be less than or equal to 12 percent and is far higher than the ash content index of foreign 8 percent, although the ash content index of the domestic first-level metallurgical coke is regulated to be less than or equal to 12 percent, the ash content standard is difficult to reach due to the practical situation of coking coal resources, and only the ash content index is reduced; the ash content of the coke has obvious influence on blast furnace smelting: the ash content of the coke is increased by 1 percent, and the coke consumption is increased by 2.5 percent; the crushing resistance of the coke is improved by 1.8% when the ash content of the coke is reduced by 1%; therefore, it is necessary to reduce ash content of the coke.
At present, the commonly used gas, fertilizer, coke and thin four-size mixed coal can be used for preparing metallurgical coke with high strength, but the metallurgical coke with the ash content reaching the index of primary metallurgical coke being less than or equal to 12 percent is difficult to prepare.
Disclosure of Invention
According to the necessity of reducing the ash content of metallurgical coke, the invention provides a preparation method of low-ash high-strength coke, which is used for preparing the low-ash coke, improving the quality of smelting products, reducing the energy consumption of smelting and achieving the purpose of reducing the ash content of the metallurgical coke.
In order to achieve the above object, a first aspect of the present invention provides a low ash high strength coke, which comprises the following components by weight: 35-50% of long flame coal, 35-50% of bituminous coal and 7-15% of coal tar, wherein:
the long flame coal is subjected to dry distillation treatment, and the particle size of the long flame coal is less than 1 mm;
the granularity of the bituminous coal is less than or equal to 2mm, and the caking index of the bituminous coal is more than 65.
The second aspect of the present invention provides a method for preparing low ash high strength coke, which is used for preparing the coke, and comprises the following steps:
the method comprises the following steps: weighing long flame coal, bituminous coal and coal tar according to the formula proportion;
step two: uniformly mixing long flame coal and bituminous coal, adding coal tar, and uniformly mixing again to obtain a mixture;
step three: pressing the mixture into a high-pressure briquette;
step four: and (3) feeding the high-pressure briquettes into a coke oven for conventional carbonization to obtain the low-ash high-strength coke with the ash content of less than 10% and the CSR = 55-70%.
As a still further scheme of the invention: in the third step, the pressure applied to the mixture per square centimeter is more than 15t when the mixture is pressed.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, dry-carbonized long-flame coal, bituminous coal with a caking index larger than 65 and a certain amount of coal tar are mixed according to a proportion, and then are made into high-pressure briquettes under high-strength pressure, and then the high-pressure briquettes are sent into a coke oven for conventional carbonization, so that coke with low ash content and high strength is obtained; because the long flame coal after dry distillation is added as the blending coal of the coke, the ash content of the metallurgical coke is reduced; the types of conventional blended coal such as gas, fertilizer, coke and lean coal are reduced, and the raw material preparation of coking coal is simplified; the large amount of low-rank coal is used, so that the production cost of metallurgical coke can be reduced; the use of low-ash high-strength coke can reduce the energy consumption of the blast furnace.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a low-ash high-strength coke, which comprises the following components in percentage by weight: 35-50% of long flame coal, 35-50% of bituminous coal and 7-15% of coal tar, wherein:
the long flame coal is subjected to dry distillation treatment, and the particle size of the long flame coal is less than 1 mm;
the granularity of the bituminous coal is less than or equal to 2mm, and the caking index of the bituminous coal is more than 65.
Among them, long-flame coal is called bituminous coal with the lowest degree of coalification in the national standard for classification of coal in china. It has a particularly high volatile content and a long flame length during combustion, so it is known. The long flame coal has weak caking property, is not coked generally, is non-coking coal and is mainly used as coal for power and chemical industry. In the coking blending coal of individual coke-oven plants, a small amount of low-ash low-sulfur long-flame coal is sometimes blended to reduce the ash content and sulfur content of the coke.
Coal dry distillation is one of the important processes in coal chemical industry, and refers to the process of heating and decomposing coal under the condition of air isolation to generate products such as coke (or semi-coke), coal tar, crude benzene, coal gas and the like, and belongs to chemical changes. According to the difference of the final heating temperature, the method can be divided into three types: performing high-temperature dry distillation at 900-1100 ℃, namely coking; medium-temperature dry distillation at 700-900 ℃; and performing low-temperature dry distillation at 500-600 ℃.
Bituminous coal is a type of coal, which is a product of further deterioration of coal, with moderate degree of coalification. 80-90% of carbon content, 4-6% of hydrogen content and 10-15% of oxygen content. According to the volatile content, the thickness of the colloidal layer or the process property, the colloidal layer can be divided into long flame coal, gas coal, fat coal, coking coal, lean coal and the like, and the coal is black, dyed, compact and crisp, black in streak and dense in smoke during combustion, so the coal is called bituminous coal. Is an important boiler fuel and coking raw material, and can also be used for dry distillation of petroleum and for producing coal gas.
Coal tar is a black or blackish brown viscous liquid with pungent odor generated during coal dry distillation. Coal tar can be divided into low-temperature coal tar, medium-temperature coal tar and high-temperature coal tar according to the dry distillation temperature, and the coal tar obtained in coke production belongs to the high-temperature coal tar.
The second aspect of the present invention provides a method for preparing low ash high strength coke, which is used for preparing the coke, and comprises the following steps:
the method comprises the following steps: weighing long flame coal, bituminous coal and coal tar according to the formula proportion;
step two: uniformly mixing long flame coal and bituminous coal, adding coal tar, and uniformly mixing again to obtain a mixture;
step three: pressing the mixture into a high-pressure briquette;
step four: and (3) feeding the high-pressure briquettes into a coke oven for conventional carbonization to obtain the low-ash high-strength coke with the ash content of less than 10% and the CSR = 55-70%.
In the third step, the pressure applied to the mixture per square centimeter is more than 15t when the mixture is pressed.
Example 1:
long-fired coal with the particle size of 45.5 percent dry distillation being less than 0.6mm, the ash content being 3.77 percent and the volatile component being 11.1 percent is obtained; 45.5 percent of bituminous coal with the caking index of 92.1 and the granularity of less than or equal to 2mm, 2.08 percent of ash content and 43.4 percent of volatile matter; adding 9% of coal tar after stirring according to the proportion, continuously stirring and mixing, then applying pressure of 22 tons per centimeter to the raw materials to prepare high-pressure briquettes, and sending the briquettes into a coke oven for conventional carbonization to obtain the coke with low ash content and high strength.
Example 2:
long-fired coal with 44% dry distillation granularity less than 0.7mm, 10% ash content and 10% volatile component; 44 percent of bituminous coal with the caking index of 92.1 and the granularity of less than or equal to 2mm, 2.1 percent of ash content and 43 percent of volatile matter; after stirring according to the proportion, adding 12 percent of coal tar, continuously stirring and mixing, then applying the pressure of 17 tons per centimeter to the raw materials to prepare high-pressure briquettes, and sending the briquettes into a coke oven for conventional carbonization to obtain the coke with low ash content and high strength.
And (3) performance testing:
the low ash high strength coke provided in examples 1 and 2 was examined to obtain the data, the data parameters are shown in table 1:
| group of | Example 1 | Example 2 |
| Ash (%) | 5.03 | 7.81 |
| Fixed carbon (%) | 93.56 | 91.09 |
| Sulfur content (%) | 0.75 | 0.67 |
| CSR（%） | 67.00 | 61.30 |
TABLE 1
As can be seen from the data in Table 1, the invention uses the long flame coal after dry distillation as the blending coal of the coke, thus reducing the ash content of the metallurgical coke; the types of conventional blended coal such as gas, fertilizer, coke and lean coal are reduced, and the raw material preparation of coking coal is simplified; the large amount of low-rank coal is used, so that the production cost of metallurgical coke can be reduced; the use of low-ash high-strength coke can reduce the energy consumption of the blast furnace.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (3)
1. A low ash high strength coke characterized by: the paint consists of the following components in percentage by weight: 35-50% of long flame coal, 35-50% of bituminous coal and 7-15% of coal tar, wherein:
the long flame coal is subjected to dry distillation treatment, and the particle size of the long flame coal is less than 1 mm;
the granularity of the bituminous coal is less than or equal to 2mm, and the caking index of the bituminous coal is more than 65.
2. The method of claim 1, wherein the coke comprises: the method comprises the following steps:
the method comprises the following steps: weighing long flame coal, bituminous coal and coal tar according to the formula proportion;
step two: uniformly mixing long flame coal and bituminous coal, adding coal tar, and uniformly mixing again to obtain a mixture;
step three: pressing the mixture into a high-pressure briquette;
step four: and (3) feeding the high-pressure briquettes into a coke oven for conventional carbonization to obtain the low-ash high-strength coke with the ash content of less than 10% and the CSR = 55-70%.
3. The method of claim 1, wherein the coke comprises: in the third step, the pressure applied to the mixture per square centimeter is more than 15t when the mixture is pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110760233.1A CN113322092A (en) | 2021-07-06 | 2021-07-06 | Preparation method of low-ash high-strength coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110760233.1A CN113322092A (en) | 2021-07-06 | 2021-07-06 | Preparation method of low-ash high-strength coke |
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| Publication Number | Publication Date |
|---|---|
| CN113322092A true CN113322092A (en) | 2021-08-31 |
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| CN202110760233.1A Pending CN113322092A (en) | 2021-07-06 | 2021-07-06 | Preparation method of low-ash high-strength coke |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303906A (en) * | 1999-12-22 | 2001-07-18 | 葛立奎 | Method for producing formed coke by using low-ash high-volatile long-flame coal |
| US20090032383A1 (en) * | 2006-02-08 | 2009-02-05 | Gregory Abramovich Berezin | Method and device for producing coke from noncaking coals |
| CN102559229A (en) * | 2010-12-31 | 2012-07-11 | 宝钢集团新疆八一钢铁有限公司 | Jet coal retorting, blending and coking process |
| CN106281387A (en) * | 2016-08-29 | 2017-01-04 | 中钢集团鞍山热能研究院有限公司 | A kind of vast scale that realizes allocates the coke production method of low-order coal into |
| CN109355080A (en) * | 2018-12-18 | 2019-02-19 | 山东铁雄新沙能源有限公司 | A kind of jet coal production coke and its production technology |
| CN112143514A (en) * | 2019-06-27 | 2020-12-29 | 江永县青鹤铝业有限公司 | Modified coke |
-
2021
- 2021-07-06 CN CN202110760233.1A patent/CN113322092A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303906A (en) * | 1999-12-22 | 2001-07-18 | 葛立奎 | Method for producing formed coke by using low-ash high-volatile long-flame coal |
| US20090032383A1 (en) * | 2006-02-08 | 2009-02-05 | Gregory Abramovich Berezin | Method and device for producing coke from noncaking coals |
| CN102559229A (en) * | 2010-12-31 | 2012-07-11 | 宝钢集团新疆八一钢铁有限公司 | Jet coal retorting, blending and coking process |
| CN106281387A (en) * | 2016-08-29 | 2017-01-04 | 中钢集团鞍山热能研究院有限公司 | A kind of vast scale that realizes allocates the coke production method of low-order coal into |
| CN109355080A (en) * | 2018-12-18 | 2019-02-19 | 山东铁雄新沙能源有限公司 | A kind of jet coal production coke and its production technology |
| CN112143514A (en) * | 2019-06-27 | 2020-12-29 | 江永县青鹤铝业有限公司 | Modified coke |
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