CN113265262B - Tamping coking method using cast iron balls as load pressing material - Google Patents
Tamping coking method using cast iron balls as load pressing material Download PDFInfo
- Publication number
- CN113265262B CN113265262B CN202110539989.3A CN202110539989A CN113265262B CN 113265262 B CN113265262 B CN 113265262B CN 202110539989 A CN202110539989 A CN 202110539989A CN 113265262 B CN113265262 B CN 113265262B
- Authority
- CN
- China
- Prior art keywords
- cast iron
- coke
- coking
- coal
- iron balls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- C10B37/00—Mechanical treatments of coal charges in the oven
- C10B37/04—Compressing charges
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 tamping coking method using cast iron balls as a load pressing material, which is suitable for coking. Firstly, forming a tamped coal cake from the matched coking coal in a tamping machine, wherein the top of the coal cake needs to form a flat-bottom groove type structure, laying a layer of cast iron balls as a load pressing material in the flat-bottom groove type structure, then transferring the coal cake into a coking chamber for coking, refining the coal cake into coke and pushing the coke, conveying the coke cake for storage through a coke conveying belt after quenching, and separating the cast iron balls mixed in the coke by using a magnetic device in the conveying process for recycling. When the coking coal is heated to a certain stage, a colloid body consisting of gas, liquid and solid phases is generated, particles can slide in the liquid phase of the colloid body by extrusion, and the distance between the particles is reduced, so that the coke quality is improved, the top coal cake is pressed under the action of a load pressing material, and the effect similar to the effect of extruding the lower coal cake is achieved. The method has simple steps, can improve the coke quality index of enterprises, and reduces the yield of coke powder.
Description
Technical Field
The invention relates to a tamping coking method, in particular to a tamping coking method which is suitable for coking coal refining and uses cast iron balls as a load pressing material.
Background
China has relatively abundant coal resources, and has proved that the recoverable reserves are more than 7300 hundred million tons, wherein the reserve of coking coal accounts for about 37 percent. However, the distribution of coal resources is unbalanced, and the coal resources are mainly concentrated in the north China area and then in the northwest area, while the coal resources in the northeast area and the central south area are relatively less and only account for about 30%. Although the types of coking coal in China are complete, the distribution is unbalanced, coking coal and fat coal are main coal types for producing coke, in China coking coal resources, the coking coal only accounts for less than 24 percent, the fat coal and gas fat coal only account for about 13 percent, parts which are high in ash content and sulfur content, difficult to wash and select and cannot be used for coking are removed, and the high-quality coking coal and fat coal account for less than 6 percent and 3 percent of the found coal resource reserves. At present, the shortage of high-quality coking coal and fat coal becomes an obstacle for ensuring the quality of coke of part of enterprises.
Aiming at the problem of resource shortage of coking coal and lean coal, measures such as increasing resource management strength and exploration strength, carrying out protectiveness and planned exploitation, enhancing coal resource recovery rate and the like are taken, a novel coking process is also required to be developed vigorously, the coke quality is improved, and the proportion of the fat coal and the main coking coal is reduced, so that the coal used in the coking process is matched with the reserve of the coking coal in China. The application of new processes such as tamping coking, molded coal blending, coal moisture control, dry quenching and the like is concerned by production enterprises.
At present, most of patents related to tamping coking are used for tamping coal samples at normal temperature, and although the quality of coke can be partially improved, the quality of coke still has room for improvement. In addition, with the advance of understanding of the behavior of coke in blast furnaces, the mechanical strength M, which is an index of cold strength of coke, has been evaluated in the past40And abrasion resistance M10Increasingly, it is replaced by the coke heat intensity index reactive CRI and the post-reaction intensity CSR. The difference of the coke quality index evaluation also has influence on the optimal operation temperature of the tamping process.
Disclosure of Invention
In order to overcome the technical problems, the invention provides a tamping coking method which uses cast iron balls as load-pressing materials and has simple method and good coking effect.
In order to achieve the technical purpose, the tamping coking method using the cast iron balls as the load pressing materials comprises the following steps:
firstly, forming a coal cake after tamping of the well-matched coking coal in a tamping machine, wherein the top of the coal cake is made into a flat bottom groove type structure;
b, placing a layer of cast iron balls as a load pressing material in a flat bottom groove type structure above the tamped coal cake, and densely arranging the cast iron balls;
c, putting the tamped coal cake into a carbonization chamber, heating the carbonization chamber to continue coking, wherein during the coking process, when the coal cake is heated to a certain stage, a colloid body consisting of gas, liquid and solid phases is generated, particles slide in the liquid phase of the colloid body by extruding the coal cake through a cast iron ball, the distance between the particles in the coal cake is reduced, and the coke with large bulk density and high strength is favorably formed, so that the quality of the coke is improved;
d, coke pushing is carried out after the coking is finished, coke quenching is carried out by adopting a dry method or a wet method, then the coke is conveyed and stored by a coke conveying belt, and the cast iron balls mixed in the coke are adsorbed and separated by using magnetic equipment in the conveying process and are continuously recycled.
Further, the maximum temperature generally controlled for coking is 1100 ℃, therefore, it is possible to select the balls of cast iron material, or other magnetizable material, as long as no melting phenomenon occurs, the cast iron material is relatively cheap and easily available, and the melting temperatures of the different materials are: low-carbon steel 1420-1450 deg.c; medium carbon steel 1450-1470 ℃; alloy steel 1450-1570 ℃; tinplate 1320-1350 ℃; 1320-1350 ℃ gray cast iron; 1340-1400 deg.C of nodular cast iron.
Furthermore, the flat bottom groove type structure formed at the top of the briquette is characterized in that a circle of high groove edge is formed at the top of the briquette, and the edge is higher than the plane of the middle part by 3-5cm, so that the cast iron ball is conveniently placed and can move by being placed at the high groove edge.
Furthermore, the cast iron balls are arranged at the top of the coal cake to form a flat-bottom trough type structure, and single-layer cast iron balls are uniformly dispersed in the flat-bottom trough type structure, so that the coal cake can be well pressed, natural gaps are reserved between the cast iron balls, and coal gas can overflow from the gaps between the cast iron balls in the carbonization process, so that the coking rate is improved, and the coke quality is improved.
Furthermore, the diameter of the cast iron ball is 30-40 mm.
Has the advantages that: the method is characterized in that firstly, a flat bottom groove type structure is manufactured at the top of a tamped coal cake, cast iron balls are placed in the flat groove structure, a colloid body consisting of gas, liquid and solid phases is generated when coking is heated to a certain stage, the coal cake is extruded by the cast iron balls to enable coking coal particles to slide in the liquid phase of the colloid body, the distance between the particles is reduced, coke with large bulk and high strength is formed, and therefore the quality of finished coke is improved. The method has simple steps, can improve the coke quality index of enterprises and reduce the yield of coke powder.
Drawings
Fig. 1 is a schematic structural diagram of the present invention in which cast iron balls are arranged above a tamped briquette as a load pressing material.
In the figure: 1-tamping the coal cake; 2-cast iron balls; 3-high groove edge.
Detailed Description
Embodiments of the present application are further described below with reference to the accompanying drawings:
the invention relates to a tamping coking method using cast iron balls as a load pressing material, which comprises the following steps:
firstly, forming a tamped coal cake 1 by using the well-matched coking coal in a tamping machine, and manufacturing the top of the tamped coal cake 1 into a flat bottom groove type structure; the flat bottom groove type structure formed at the top of the tamped coal cake 1 is characterized in that a circle of high groove edge 3 is formed at the top of the coal cake, and the height of the high groove edge 3 is 3-5cm higher than the plane of the middle part;
b, placing a layer of cast iron balls 2 as a load pressing material in a flat bottom groove type structure above the tamped coal cake 1, preventing the cast iron balls 2 from moving by using a high groove edge 3, and placing the tamped coal cake 1 into a carbonization chamber. Specifically, the cast iron balls 2 are arranged at the top of the tamped coal cake 1 to be uniformly dispersed in a flat bottom groove type structure in a single layer manner, so that the tamped coal cake 1 can be well pressed, natural gaps are reserved between the cast iron balls, and coal gas can overflow from the gaps between the cast iron balls in the carbonization process, thereby improving the coking rate and the coke quality, and the diameter of the cast iron balls 2 is 30-40 mm;
the maximum temperature generally controlled for coking is 1100 ℃, therefore, it is possible to choose balls of cast iron materials, but also balls of other magnetizable materials, as long as no melting phenomena occur, cast iron materials are relatively cheap and readily available, and the melting temperatures of the different materials are: low-carbon steel 1420-1450 deg.c; medium carbon steel 1450-1470 ℃; alloy steel 1450-1570 ℃; tinplate 1320-1350 ℃; 1320-1350 ℃ gray cast iron; 1340-1400 deg.C of nodular cast iron.
c, heating by using a carbonization chamber to continue coking operation, wherein in the carbonization process, when the tamped coal cake 1 is heated to a certain stage, a colloid body consisting of gas, liquid and solid phases is generated, particles slide in the liquid phase of the colloid body by extruding the tamped coal cake 1 through a cast iron ball 2, and the distance between the particles in the coal cake is reduced, so that coke with large bulk and high strength is formed, and the quality of the coke is improved;
d, coke pushing is carried out after the coking is finished, coke quenching is carried out by adopting a dry method or a wet method, then the coke is conveyed and stored by a coke conveying belt, and the cast iron balls mixed in the coke are adsorbed and separated by using magnetic equipment in the conveying process and are continuously recycled.
The first embodiment,
The use of 40kg small coke oven experiments to test that the cast iron balls as the load pressing material are tamped for coking can effectively improve the caking degree and the quality of the coke, as shown in the table 1:
TABLE 1
The technology is suitable for all coke ovens, especially coke ovens with large hearths, and the effect is more obvious when the area of the end surface of the top layer is larger.
Claims (4)
1. A tamping coking method using cast iron balls as a load pressing material is characterized by comprising the following steps:
firstly, forming a coal cake after tamping of the well-matched coking coal in a tamping machine, wherein the top of the coal cake is made into a flat bottom groove type structure;
b, placing a layer of cast iron balls as a load pressing material in a flat bottom groove type structure above the tamped coal cake, and densely arranging the cast iron balls;
c, putting the tamped coal cake into a carbonization chamber, heating the carbonization chamber to continue coking, wherein during the coking process, a colloid body consisting of three phases of gas, liquid and solid is generated during the heating process of the tamped coal cake, particles slide in the liquid phase of the colloid body by extruding the tamped coal cake through a cast iron ball, the distance between the particles in the coal cake is reduced, and the tamping coal cake is beneficial to forming coke with large bulk and high strength, so that the quality of the coke is improved;
d, after the coking is finished, pushing coke, quenching the coke by adopting a dry method or a wet method, then conveying and storing the coke by a coke conveying belt, adsorbing and separating cast iron balls mixed in the coke by using magnetic equipment in the conveying process, and continuously recycling the cast iron balls;
the flat bottom groove type structure formed at the top of the briquette is characterized in that a circle of high groove edge is formed at the top of the briquette, and the edge is higher than the plane of the middle part by 3-5cm, so that the cast iron ball is conveniently placed, and the cast iron ball is prevented from moving by the high groove edge.
2. The stamp-charging coking method using cast iron balls as the load-pressing material as claimed in claim 1, characterized in that: the coking highest temperature is 1100 ℃, and balls made of other magnetizable materials are selected to replace cast iron balls as long as the melting phenomenon is not generated.
3. The stamp-charging coking method using cast iron balls as the load-pressing material as claimed in claim 1, characterized in that: the top of the coal cake is made into a flat-bottom trough structure, and a single layer of cast iron balls are uniformly dispersed in the flat-bottom trough structure, so that the coal cake can be well pressed, natural gaps are left between the cast iron balls, and gas can overflow from the gaps between the cast iron balls in the carbonization process, thereby improving the coking rate and the coke quality.
4. The stamp-charging coking method using cast iron balls as the compressive load material according to claim 1, characterized in that: the diameter of the cast iron ball is 30-40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539989.3A CN113265262B (en) | 2021-05-18 | 2021-05-18 | Tamping coking method using cast iron balls as load pressing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539989.3A CN113265262B (en) | 2021-05-18 | 2021-05-18 | Tamping coking method using cast iron balls as load pressing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113265262A CN113265262A (en) | 2021-08-17 |
| CN113265262B true CN113265262B (en) | 2022-06-10 |
Family
ID=77231549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110539989.3A Active CN113265262B (en) | 2021-05-18 | 2021-05-18 | Tamping coking method using cast iron balls as load pressing material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113265262B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8006807A (en) * | 1979-10-23 | 1981-04-28 | Nippon Steel Corp | PROCESS AND APPLIANCE FOR FILLING THE CARBONIZATION CHAMBER OF A COOK OVEN WITH COAL IN PO |
| JP5434803B2 (en) * | 2010-06-07 | 2014-03-05 | 新日鐵住金株式会社 | Test coke oven equipment |
| CN102925183A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Hot tamping coke making method |
| CN203461999U (en) * | 2013-07-12 | 2014-03-05 | 武汉钢铁(集团)公司 | High-efficiency testing coke oven |
| CN103992807B (en) * | 2014-06-07 | 2016-01-27 | 太原理工大学 | Method for producing carbonized coal/coke for gasification by large-scale tamping coal cake on coke oven |
| CN111548807B (en) * | 2020-04-30 | 2021-04-27 | 鞍钢股份有限公司 | Device and method for compacting coking by utilizing thermal expansibility of coal |
-
2021
- 2021-05-18 CN CN202110539989.3A patent/CN113265262B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113265262A (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110241273B (en) | Iron coke prepared from Exie iron ore and gas coal and preparation method thereof | |
| WO2016109812A1 (en) | Multi-modal beds of coking material | |
| CN101942315A (en) | High-proportion coal blending and coking method | |
| CN101870875B (en) | Method for producing metallurgical coke from 1/3 coking coal and non-coking coal | |
| US3185635A (en) | Method for producing metallurgical coke and metal-coke from both coking and non-coking coals | |
| CN109609714B (en) | Diagnosis method for large-scale blast furnace core accumulation | |
| CN106635067A (en) | Shaft furnace process for producing iron coke | |
| JP4892929B2 (en) | Ferro-coke manufacturing method | |
| CN103803552B (en) | Preparation method of industrial silicon smelting reducer | |
| CN112266997A (en) | Coal-based hydrogen metallurgy process for raw iron ore | |
| CN110093467B (en) | Preparation method of iron coke | |
| CN109957431A (en) | A method of iron coke Composite burden is produced using steel rolling sludge | |
| CN113265262B (en) | Tamping coking method using cast iron balls as load pressing material | |
| CN113684336A (en) | Direct reduction process of iron ore coal-based step-by-step oxygenation-segmented hydrogen increasing rotary kiln | |
| Tiwari et al. | Efficient way to use of non-coking coals in non-recovery coke making process | |
| JP4892930B2 (en) | Ferro-coke manufacturing method | |
| CN104745798A (en) | Sintering process for ferrochromium fine powder ore pellets | |
| CN110819792A (en) | Method for producing pre-reduced sinter | |
| Sharma et al. | Producing high coke strength after reactivity in stamp charged coke making | |
| JP5087868B2 (en) | Ferro-coke manufacturing method | |
| CN114656988A (en) | Iron-titanium composite coke for low-carbon iron making and manufacturing method thereof | |
| Agrawal | Technological Advancements in Cokemaking | |
| US3700564A (en) | Continuous process of producing shaped metallurgical coke | |
| KR20180056879A (en) | Method for manufacturing coal briquettes and apparatus for manufacturing the same | |
| CN205953532U (en) | Production system of calcium carbide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |