CN212687965U

CN212687965U - Coke production device

Info

Publication number: CN212687965U
Application number: CN202021508954.0U
Authority: CN
Inventors: 徐兴福; 孙宝东; 盛建文
Original assignee: Nanjing Jinjiang Metallurgical Burden Co ltd; Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Jinjiang Metallurgical Burden Co ltd; Nanjing Iron and Steel Co Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-03-12
Anticipated expiration: 2030-07-27

Abstract

The utility model discloses a preparation facilities of coke belongs to coal blending coking technical field. The preparation device comprises a quantitative blending coal bin for quantitatively providing 1/3 coking coal, fat coal and coking coal, a semi coke blending bin for quantitatively providing semi coke, a mixing crusher and a coke oven, wherein the materials quantitatively provided by the quantitative blending coal bin and the semi coke blending bin enter the mixing crusher to be crushed and uniformly mixed and then are sent to the coke oven for coking. Compared with the prior art, the device for preparing the coke is provided with the semi-coke proportioning bin, so that the semi-coke can be quantitatively added to replace coking clean coal as a thinning agent, further the semi-coke is blended with the coal for coking, the types of coking coal are expanded, and the application range of the semi-coke is expanded.

Description

Coke production device

Technical Field

The utility model belongs to the technical field of join in marriage the coal coking, concretely relates to join in marriage preparation facilities of coke that adds blue charcoal.

Background

The coal blending coking is to blend different grades of single coking coals according to a certain proportion for coking so as to make full use of the coking characteristics of various coals to make up for deficiencies and improve the quality of metallurgical coke. In general, coal blending and coking should follow several basic principles: the coke quality meets the user requirements; ash and sulfur in the coal blending are reduced as much as possible; the production and operation are facilitated, and the coke oven body is not damaged due to difficult coke pushing caused by overlarge expansion pressure; on the premise of meeting the coke quality, the yield of byproducts is increased, and the use of high-quality coking coal is reduced; the cost of raw materials is reduced to the maximum extent.

However, the types of the raw materials for coal blending and coking are relatively fixed, and the limitation of the raw materials is gradually highlighted under the condition of the coal structure in the metallurgical industry. In particular, the coking clean coal, especially the high-quality coking clean coal, has less resources and high price, which leads to high cost of the coking enterprises. On the basis of satisfying the coke quality based on the existing coal structure conditions, the coking raw materials are properly expanded, thereby saving high-quality coking coal resources, reducing the cost of blended coal and improving the economic benefit, and the method is one of the development directions of the coal blending and coking technology.

The semi-coke is a novel carbon material with high fixed carbon content, which is obtained by dry distillation and heat desorption of high-volatile bituminous coal without caking property or weak caking property under the condition of medium and low temperature. Because the sulfur content of the semi coke is only 10-50 percent of that of raw coal, the semi coke has good environmental protection property and price advantage, the semi coke is popularized in chemical industry, gas making and smelting injection, but is blank in the coking field as a raw material replacing part for coking clean coal. How to adjust the coal structure and the coal preparation coking process system to improve the coking adaptability of semi coke is an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects of the prior art, the utility model provides a coke preparation device, which can realize the coke preparation by adopting semi coke.

The technical scheme is as follows: a preparation facilities of coke, including the dosing bunker that is used for the ration to provide 1/3 coking coal, fat coal, coking coal respectively, be used for the ration to provide blue charcoal proportioning bins, mixing crusher and the coke oven of blue charcoal, the dosing bunker with the material that blue charcoal proportioning bins ration provided gets into mixing crusher and smashes the mixing back and send into the coke oven coking.

And the semi-coke blending bin is used for quantitatively providing semi-coke, and the semi-coke is crushed to a target granularity by the semi-coke pulverizer and then is sent into the mixing crusher. Therefore, the semi-coke can be pre-crushed and ground to reach the quality of less than 0.5mm by more than 50 percent, and after the semi-coke with the quality of less than 1.0mm by more than 80 percent meets the target granularity composition requirement, the semi-coke and other materials enter a mixing crusher together to be uniformly mixed, so that the granularity requirement can be met before uniform mixing, and the semi-coke is prevented from being difficult to crush to the target granularity in the mixing crusher because the semi-coke proportion is too small.

Further, the dosing coal bin comprises a plurality of relatively independent bins, wherein 1/3 coking coal occupies at least one bin, fat coal occupies at least two bins, and coking coal occupies at least three bins. A plurality of bins are arranged according to different coal types of actual fat coal and coking coal, so that the quality indexes of the fat coal or the coking coal can be controlled according to the quality indexes of different coals, and the final coking quality is improved.

Wherein the coke oven is a 55-hole or 60-hole coke oven.

Further, the coke oven is a 6m top-mounted coke oven.

Specifically, the coke prepared by the preparation device comprises the following components in percentage by mass: 1/3 coking coal 32-40%, fat coal 22-28%, coking coal 32-38%, semi coke 2-5%.

Wherein, the quality index of the semi coke comprises: the total moisture content is below 16.0%, the dry base ash content is below 12.0%, the dry ash-free base volatile matter content is below 15.0%, and the dry base total sulfur content is below 0.5%.

When the preparation device is used for preparing the coke, the components are quantitatively provided according to the proportion, mixed and crushed, and then sent to a coke oven for coking, the standard temperature is controlled to be 1150-1280 ℃, and the coking time is 19-24 hours.

And further comprises a step of grinding the semi-coke powder supplied in a fixed amount until the particle size is not more than 0.5mm and not more than 50% of the self mass, and the particle size is not more than 1.0mm and not more than 80% of the self mass.

Has the advantages that: compared with the prior art, the device for preparing the coke is provided with the semi-coke proportioning bin, so that the semi-coke can be quantitatively added to replace coking clean coal as a thinning agent, further the semi-coke is blended with the coal for coking, the types of coking coal are expanded, and the application range of the semi-coke is expanded.

Drawings

FIG. 1 is a schematic structural view of a manufacturing apparatus of the present invention;

Detailed Description

As shown in fig. 1, a coke preparation apparatus includes a blending bunker 1 for quantitatively supplying 1/3 coking coals, fat coals and coking coals, a semi coke blending bunker 2 for quantitatively supplying semi coke, a mixing pulverizer 3, a coke oven 4, and a semi coke pulverizer 5, wherein the semi coke quantitatively supplied from the semi coke blending bunker 2 is pulverized to a target particle size by the semi coke pulverizer 5, and then is fed into the mixing pulverizer 3. The materials quantitatively provided by the quantitative proportioning coal bin 1 and the semi coke proportioning bin 2 enter a mixing crusher 3 to be crushed and uniformly mixed, and then are sent to a coke oven 4 for coking.

The semi-coke coal blending coking device can realize semi-coke coal blending coking, and the device is explained in further detail by the trial production data of a certain domestic plant.

In the test production process, the quality indexes of the semi-coke meet the technical requirements that the total moisture Mt is below 16.0%, the dry base ash content Ad is below 12.0%, the dry ash-free base volatile matter Vdaf is below 15.0%, and the dry base total sulfur St.d is below 0.5%. The specific quality index of the blue charcoal incoming material detection assay is shown in table 1:

TABLE 1 Ramsbottom charcoal coming material quality index (%)

Serial number	Mt	Ad	Vdaf	St.d
					1	12.0	10.52	11.15	0.44
2	15.4	9.43	12.53	0.26
					3	11.9	11.25	10.31	0.50
4	14.5	11.31	9.87	0.28
					5	14.7	12.00	11.52	0.29

Divide into two batches with above supplied materials and try out the production, adopt blue charcoal flour mill 5 in FIG. 1 to carry out the broken grinding in advance to each batch of blue charcoal, make it the granularity composition reach the utility model discloses a requirement guarantees that the granularity reaches more than 50% of its self quality below 0.5mm, and the granularity reaches more than 80% of its self quality below 1.0 mm. The quality data of two batches of semi-coke detected in the production process are shown in table 2:

TABLE 2 semi-coke coking production test data

Then quantitatively feeding the mixture and other components into a mixing pulverizer to pulverize and uniformly mix. The test production proportioning scheme is shown in table 3. Wherein, the ratio 6 is a comparative example and is the ratio of the original metallurgical coke without the semi coke:

table 3 respective component ratios (%)

After crushing and mixing, the mixture is respectively sent into a 6-meter top-mounted coke oven carbonization chamber with 55 holes or 60 holes for coking, and the coking process parameters during the trial production are shown in the table 4:

TABLE 4 Process control requirements during test growth

Wherein, the inside and outside of the bracket are standard temperature parameters adopted under two coking times.

The quality data of the coke in the above test production ratios are shown in table 5, wherein the sixth group is the quality and cost of the original metallurgical coke product:

TABLE 5 analysis of coke product quality and cost in coke oven trial production of semi coke blending coal 6m

As can be seen from the experimental production examples, the cold and hot strength of the coke obtained by matching the semi coke production ratio is basically kept close to the original production ratio strength. And later-stage production verification proves that the coking rate of semi-coke blending coal coking is similar to that of the original metallurgical coke blending ratio, so that the coking coal is replaced by a small amount of semi-coke, the quality and the cost of the coke are basically maintained at the original level, and the aim of controlling the coal index is fulfilled.

Claims

1. The utility model provides a preparation facilities of coke, its characterized in that is including quantitative blending bunker (1) that is used for the ration to provide 1/3 coking coal, fat coal, coking coal respectively, blue charcoal proportioning bins (2), mixing grinder (3) and coke oven (4) that are used for the ration to provide blue charcoal, quantitative blending bunker (1) with the material that blue charcoal proportioning bins (2) ration provided gets into mixing grinder (3) and smashes the mixing back and send into coke oven (4) coking.

2. The preparation device according to claim 1, further comprising a semi-coke pulverizer (5), wherein semi-coke quantitatively supplied from the semi-coke proportioning bin (2) is pulverized to a target particle size by the semi-coke pulverizer (5) and then fed into the mixing pulverizer (3).

3. The production plant according to claim 1, characterized in that the dosing bunker (1) comprises a plurality of relatively independent bunkers, wherein 1/3 coking coal occupies at least one bunker, fat coal occupies at least two bunkers, and coking coal occupies at least three bunkers.

4. The production device according to claim 1, characterized in that the coke oven (4) is a 55-or 60-hole coke oven.

5. The production plant according to claim 1 or 4, characterized in that the coke oven (4) is a 6m top-loaded coke oven.