CN109022010B - Coal for tamping coking - Google Patents
Coal for tamping coking Download PDFInfo
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- CN109022010B CN109022010B CN201810856086.6A CN201810856086A CN109022010B CN 109022010 B CN109022010 B CN 109022010B CN 201810856086 A CN201810856086 A CN 201810856086A CN 109022010 B CN109022010 B CN 109022010B
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- coal
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses coal for tamping coking, and relates to the field of coking and coal blending; the coal for tamping coking comprises medium clean coal which is extracted from the medium coal of coking coal; the invention provides a coking coal blending method with middle clean coal participation in tamping coking, develops a new coking coal resource, and relieves the current situation of shortage of coking coal to a certain extent; because the medium clean coal is extracted from the middlings of the coking coal, the inherent components and the evolution process of the coal are similar to those of the main coking coal, and the content of harmful metal elements influencing the coke quality is low in analysis, so that the coke quality is not influenced; the addition of the medium clean coal can reduce the cost, save the coking coal resources and provide a new idea for reducing cost and improving efficiency for coking enterprises.
Description
Technical Field
The invention relates to the field of coking and coal blending, in particular to coal for tamping coking added with medium clean coal.
Background
The coke is an important raw material and fuel in the metallurgical industry, and with the rapid development of the steel industry in China, the steel yield is rapidly increased, the demand for the coke is increasingly high, and the quality requirement is also increasingly high. The quality of coke is severely restricted by the shortage of coking coal resources in China. Therefore, the development of coking by replacing or partially replacing coking coal with non-coking coal is very urgent, and the method has important strategic significance particularly for China.
Although the coal resources in China are rich, the types of coal suitable for coking are few, the regional distribution of the resources is extremely unbalanced, particularly, the reserves of high-quality coking coal such as coking coal, fat coal and the like are less, and the consumption is increased continuously, so that the coking coal resources are relatively short. The coking coal reserves only account for 26.25% of the total reserves of coal in China, wherein the strong viscous coal is scarce, the fat coal, the gas fat coal and the coking coal respectively account for 12.81% and 23.61% of the reserves of the coking coal, and the strong viscous coal reserves also comprise a considerable amount of refractory and high-sulfur coal resources which cannot be used as coking raw materials, so the strong caking coal resources in China are scarce and precious. Therefore, the method utilizes the advantages of the existing coal resources in China, reduces the coking cost and improves the coke quality by developing and expanding the types of the coking coal, becomes an effective way for solving the shortage of the coking coal, and can meet the requirement of long-term development.
The clean coal is produced by washing the raw coal such as coking coal, fat coal, gas coal and lean coal used in common coal blending coking, the cold strength and the hot strength of the coke primarily guaranteed by coal blending coking, and the coke ash content is higher or lower due to the change of the coal blending proportion, the primary guarantee of the strength and other reasons. In order to ensure that the cold-state and hot-state strength of coke is not affected in the process of coal blending and coking, a great deal of research and study is made on the aspect of coal blending and coking by coking workers.
Disclosure of Invention
The invention overcomes the defects of the prior art and aims to provide the coking coal prepared with the medium clean coal in tamping coking.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the tamping coking coal comprises medium clean coal which is extracted from the medium coal of the coking coal.
Preferably, the coal for tamping coking comprises medium clean coal accounting for 1-5% of the total weight of the coal.
Preferably, the paint comprises the following components in percentage by weight: coking coal: accounting for 15 to 30 percent of the total weight of the coal blending; 1/3 coking coal: accounting for 15 to 30 percent of the total weight of the coal blending; medium clean coal: accounting for 1 to 5 percent of the total weight of the blended coal; lean coal: vitrinite reflectance R of lean coalmaxIn a specific interval of 1.50-1.75%, the proportion is more than 65%, and lean coal accounts for 10-30% of the total amount of the blended coal; gas coal: vitrinite reflectance R of gas coalmaxThe proportion of the specific interval of less than 0.75 percent is less than 75 percent, and the gas coal accounts for 25 to 40 percent of the total amount of the blended coal.
Preferably, the medium clean coal is: ash content less than 20%, volatile component 18-25%, caking index G value 20-40, sulfur content 0.4-0.7%, and Na content as each metal element in the medium-fine coal2O is 0.55%, K20.14% of O and Fe2O32.97%, GaO 3.3%, MgO 0.48%.
The invention provides a coking coal blending method with middle clean coal participation in tamping coking, develops a new coking coal resource and relieves the current situation of shortage of coking coal to a certain extent. The addition of the medium clean coal can reduce the cost, save the coking coal resources and provide a new idea for reducing cost and improving efficiency for coking enterprises.
Compared with the prior art, the invention has the following beneficial effects:
1) the sale price of the coal as the electricity coal is very low, about 200 yuan, the price of the cleaned coal after being put into the coking coal washing is less than 600 yuan, and the price of the coal with the modern price of 1100 yuan can be reduced by 5 yuan to 25 yuan by 1 to 5 percent of the coal dosage.
2) Because the medium clean coal is extracted from the medium coal of the coking coal, the inherent components and the evolution process of the coal are similar to those of the main coking coal, and the content of harmful metal elements influencing the coke quality is little and the coke quality is not influenced when the medium clean coal is analyzed.
3) The medium-grade clean coal is used for power generation, has high cost and resource waste, replaces coking coal for blending coal for coking, can save the amount of high-quality coking coal, and saves resources by secondary blending.
4) The ash content of the coke is required to be less than 12.5%, the ash content of the produced coke reaches 12.3%, although the ash content meets the standard requirement, 0.2% of the ash content is wasted, if 1% of medium clean coal is used for replacing the medium clean coal, the quality is not excessive, and the cost of one ton of coal can be reduced by 5 yuan. On the premise of ensuring the coke quality index, the cost is reduced.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The coal types adopted by the invention are all domestic coal, and the coal quality analysis results of the single coal are shown in table 1.
TABLE 1 Industrial analysis of coal and clay
The weight percentage of each single coking coal and the medium clean coal is as follows: gas coal: 25% -40%; 1/3 coking coal: 15% -30%; lean coal: 10 to 30 percent; coking coal: 15% -30%; medium clean coal: 1 to 5 percent.
Specific examples of coal blending schemes are shown in Table 2.
TABLE 2 coal blending protocol
The cokes obtained in the examples 1 to 4 and the comparative example have the data result of 100 ten thousand of 4.3 m stamp-charging coke ovens produced under the process condition that each single coking coal and medium clean coal are firstly mixed and then crushed in a production system.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. The coal for tamping coking is characterized by comprising the following components in percentage by weight:
coking coal: accounting for 15 to 30 percent of the total weight of the coal blending;
1/3 coking coal: accounting for 15 to 30 percent of the total weight of the coal blending;
medium clean coal: accounting for 1 to 5 percent of the total weight of the blended coal;
lean coal: vitrinite reflectance R of lean coalmaxIn a specific interval of 1.50-1.75%, the proportion is more than 65%, and lean coal accounts for 10-30% of the total amount of the blended coal;
gas coal: vitrinite reflectance R of gas coalmaxThe proportion of the specific interval is less than 75 percent and less than 0.75 percent, and the gas coal accounts for 25 to 40 percent of the total amount of the blended coal;
the medium clean coal is as follows: ash content less than 20%, volatile component 18-25%, caking index G value 20-40, sulfur content 0.4-0.7%, and Na content as each metal element in the medium-fine coal2O is 0.55%, K20.14% of O and Fe2O32.97%, GaO 3.3%, MgO 0.48%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856086.6A CN109022010B (en) | 2018-07-31 | 2018-07-31 | Coal for tamping coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810856086.6A CN109022010B (en) | 2018-07-31 | 2018-07-31 | Coal for tamping coking |
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| Publication Number | Publication Date |
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| CN109022010A CN109022010A (en) | 2018-12-18 |
| CN109022010B true CN109022010B (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810856086.6A Active CN109022010B (en) | 2018-07-31 | 2018-07-31 | Coal for tamping coking |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3997422A (en) * | 1975-06-20 | 1976-12-14 | Gulf Oil Corporation | Combination coal deashing and coking process |
| DE2654186A1 (en) * | 1976-11-30 | 1978-06-01 | Still Fa Carl | Metallurgical coke prodn. from low-grade coal - using fusible gas-releasing inorganic additives |
| CN101768489A (en) * | 2008-12-29 | 2010-07-07 | 王竹青 | Improved coke preparation method |
| CN103436280A (en) * | 2013-09-11 | 2013-12-11 | 神华集团有限责任公司 | Method for preparing coke by using direct coal-liquefied residue |
| CN103831164A (en) * | 2014-02-24 | 2014-06-04 | 太原理工大学 | Gravity-flotation joint separation technology for coking middlings |
| CN105728155A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Dissociation and recleaning process for coking middlings |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294087A (en) * | 2008-06-20 | 2008-10-29 | 武汉钢铁(集团)公司 | Coke making coal blending method with black-jack participated |
| CN105331381B (en) * | 2014-08-15 | 2018-11-20 | 中国平煤神马集团许昌首山化工科技有限公司 | A kind of coke making and coal blending method |
-
2018
- 2018-07-31 CN CN201810856086.6A patent/CN109022010B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3997422A (en) * | 1975-06-20 | 1976-12-14 | Gulf Oil Corporation | Combination coal deashing and coking process |
| DE2654186A1 (en) * | 1976-11-30 | 1978-06-01 | Still Fa Carl | Metallurgical coke prodn. from low-grade coal - using fusible gas-releasing inorganic additives |
| CN101768489A (en) * | 2008-12-29 | 2010-07-07 | 王竹青 | Improved coke preparation method |
| CN103436280A (en) * | 2013-09-11 | 2013-12-11 | 神华集团有限责任公司 | Method for preparing coke by using direct coal-liquefied residue |
| CN103831164A (en) * | 2014-02-24 | 2014-06-04 | 太原理工大学 | Gravity-flotation joint separation technology for coking middlings |
| CN105728155A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Dissociation and recleaning process for coking middlings |
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| CN109022010A (en) | 2018-12-18 |
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