JPH01249886A - Control of bulk density in coke oven - Google Patents

Abstract

PURPOSE:To provide the subject control process so designed that part of the raw coal on a coal truck is stored and the rest is charged into a coke oven followed by charging the coke oven with said stored coal, thereby eliminating variation in the bulk density depending on oven height and leveling the mechanical strength of product coke. CONSTITUTION:Raw coal 5 on a coal truck 3 is transferred to a hopper 11 through the operation of a bucket elevator 10 to hold ca. 20wt.% of the amount to be changed into a chamber in said hopper 11. Thence, a table feeder 4 is actuated to charge the chamber 2 of a coke oven with the rest of raw coal on the coal truck 3. A damper 12 of the hopper 11 is then opened tp charge the chamber 2 with the raw coal 5 in the hopper. Thus, 80wt.% of raw coal to be charged into the chamber 2 is fed to the lower and middle tiers in the chamber 2 via the table feeder 4, while 20wt.% of the raw coal to the upper tier directly through the hopper 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the method of charging coking coal into a coke oven.

[Prior Art] FIG. 3 is an explanatory diagram showing a conventional situation in which coking coal is charged into a coke oven. As shown in the figure, a coal loading car 3 is run over a coke oven 1, and coking coal 5 is charged into a chamber 2 of the coke oven by a table feeder 4 of the coal loading car.

[Problems to be Solved by the Invention] Generally speaking, when charging coking coal 5 into a high furnace such as coke oven 1, even if the coking coal 5 has an average particle size distribution, While falling through the chamber 2, which has a high height, segregation occurs depending on the size of the particles, and large particles tend to concentrate in the lower chamber and small particles tend to concentrate in the upper chamber. As a result, the coking coal 5 charged into the furnace is
The bulk density changes between the upper and lower stages.

Figure 4 is a diagram showing the difference in bulk density due to the difference in height of the coking coal 5 charged into the chamber 2. As seen in the figure, the bulk density between the upper stage and the lower stage is 100 kg/m" or more. These variations in bulk density cause variations in the strength of coke products, and there has long been a demand for countermeasures against them.

The present invention has been made to solve the above-mentioned problems of conventional devices, and aims to provide a charging method that does not cause variations in bulk density when charging raw coal into a coke oven.

[Means for Solving the Problems] In order to achieve the above object, the coking coal charging method according to the present invention includes a hopper on a coal loading car whose charging port is higher than the coal loading position of the coal loading car, and It is equipped with a coal storage facility consisting of a bucket elevator that sends coking coal to the chamber, and when charging coking coal from a coal loading car to a chamber, a part of the coking coal on the coal loading car is first stored in a hopper by the bucket elevator, After the table feeder of the coal loading car finishes charging the raw coal into the chamber, the raw coal in the hopper is charged.

[Effects] If coal is charged using the above charging method, there will be some difference in bulk density between the lower and middle stages of the furnace, but the upper stage will have a larger falling distance compared to the conventional coal charging method, so the bulk density will be lower. The density improves, and the bulk density becomes average throughout the furnace.

[Embodiment of the Invention] FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
10 is a bucket elevator, 11 is a hopper, and 12 is a damper thereof.

As shown in the figure, a bucket elevator 10 is placed on the coal loading car 3.
A coal storage facility consisting of a hopper 11 and a hopper 11 is provided. The coal charging port of the hopper, that is, the position of the damper 12 is set slightly higher than the raw coal charging position of the coal charging car 3.

The coal loading car 3 receives enough coking coal to fill one chamber 2 from the coal tower, and runs over the corresponding chamber. For coal loading, first operate the bucket elevator 10 to move the coking coal 5 on the coal loading car 3 into the hopper 11,
Approximately 20% of the amount to be charged into the chamber is stored in the hopper 11. Next, the table feeder is operated to charge the coking coal 5 on the coal loading car 3 into the chamber 2 of the coke oven.

When the table feeder 4 completes coal loading, the hopper 1
1 damper 12 is opened, and the raw coal 5 in the hopper is charged into the chamber 2. That is, 80% of the coking coal to be charged into the chamber 2 of the furnace is charged into the lower and middle stages of the chamber 2 by the table feeder 4, and 20% is charged directly into the upper stage of the chamber 2 from the hopper 11. .

In this embodiment, the ratio of the amount of coal loaded by the table feeder 4 to the amount of coal loaded from the hopper 11 is 80%:20%, but it is not necessarily limited to this figure, and the It should be changed as appropriate according to the specifications, etc.

Further, the coal storage equipment may have other configurations other than the configuration of the bucket elevator and hopper as shown in this embodiment.

Furthermore, the present invention is effective not only in the case of charging a coke oven as shown in the embodiment, but also in a wide range of cases where segregation of the contents of ordinary ovens and ground bags is not desired.

[Effects of the Invention] When charging coking coal into a coke oven, the present invention provides a coal loading car with coal storage equipment, first stores a part of the coking coal on the coal loading car in the coal storage equipment, and then charges the coking coal onto the coal loading car. After charging the coking coal into the coke oven, the coking coal from the coal storage facility is charged into the coke oven, so the bulk of the coking coal charged into the coke oven due to the height of the furnace We were able to achieve the excellent effect of greatly reducing the variation in density and almost eliminating the variation in the strength of the product coke.

FIG. 2 is a diagram showing variations in bulk density of coking coal in a furnace charged by the charging method according to the present invention. It can be seen that the variation is about 30 kg/rn3, which is significantly reduced compared to the conventional variation of 100 kg/-m' shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a method of charging coking coal into a coke oven according to an embodiment of the present invention, and FIG. 2 is a diagram showing variations in the bulk density of coking coal in the furnace in the embodiment. FIG. 3 is an explanatory diagram of a conventional coal loading method, and FIG. 4 is a diagram showing variations in the bulk density of coking coal in a conventional coke oven. In the figure, 10 is a bucket elevator, 11 is a hopper, and 12 is a damper thereof. Agent Patent Attorney Souji Sasaki Figure 1

Claims (1)

[Claims] The coke oven comprises a hopper on a coal loading car, the coal loading port of which is higher than the coal loading position of the coal loading car, and a bucket elevator for feeding coking coal on the coal loading car to the hopper. When charging coking coal into a coke oven using a coal storage facility, a part of the coking coal on the coal loading car is first stored in the coal storage facility, and after the coking coal on the coal loading car has been charged into the coke oven. A method for controlling bulk density in a coke oven, characterized in that the coking coal in the coal storage equipment is charged into the coke oven after the coal is stored in the coal storage facility.