JPS6123843B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-furnace chute drive device in a blast furnace charging device.

In the conventionally widely used bell-type charging equipment, the distribution shape of the charge into the furnace is controlled by the shape of the bell, the mounting position, etc., and even if a movable armor is used in combination, the distribution control range is limited. It's something to pick up.

In modern blast furnaces, there is a trend toward larger furnaces and higher pressure operation, and due to the need for uniform distribution of raw materials charged into the furnace and improved controllability, the bellless type with an in-furnace chute is required. Charge distribution devices are increasingly being adopted.

In conventionally used bell-less charging devices, differential gears are used to rotate and tilt the in-furnace chute, resulting in a complex configuration and difficulty in maintenance and inspection.

Therefore, by constructing a table that can be raised and lowered and rotated as shown in Figure 1, the in-furnace chute connected to this table can be tilted and rotated, and even with a simple mechanism, distribution controllability equivalent to that of the conventional bellless type can be achieved. The aim is to secure and meet recent demands.

The present invention provides a blast furnace charging apparatus in which a vertical chute is rotatably provided at the center of the furnace top, and an in-furnace rotating chute is rotatably and tiltably provided at the lower end of the vertical chute. a lower rotating table is rotatably fixed to the lower part of the vertical chute, and the upper rotating table and the inner furnace rotating chute are connected with a hanging tool,
This is an in-furnace chute drive device in a blast furnace charging device, characterized in that the in-furnace revolving chute is configured to be tiltable by raising and lowering an upper revolving table.

The present invention will be explained based on the embodiment shown in FIG.

The raw materials to be charged into the furnace are transported to the top of the furnace by a charging conveyor, etc., and descend one by one from the top of the furnace while maintaining a gas seal between the inside and outside of the furnace, passing through a lower hopper 1, upper and lower vertical chutes 2 and 3, and then being transferred to the furnace. It is charged into the furnace through the inner chute 5.

The raw material distribution within the furnace can be controlled by the inclination and rotational speed of the in-furnace chute 5, or a combination of both.

Next, the in-furnace chute tilting mechanism, which is a feature of the present invention and is installed in the gas seal hopper 8, will be explained.

The structure of this device is broadly divided into a rotating body, a rotating drive device, and an elevation drive device for an upper rotating table 10 for controlling the tilting of the in-furnace chute 5.

In this structure, the rotating body section is composed of a lower vertical chute 3, an upper rotating table 10, a lower rotating table 11, an in-furnace chute 5, etc. When the in-furnace chute 5 rotates, these rotate at the same time about the furnace center axis. I do.

Here, the lower vertical chute 3 is supported by a bracket 13 mounted inside the gas collection mantel 7 via a pivot bearing 12 fixed to the lower pivot table 11.

Furthermore, the in-furnace chute 5 is attached to the lower vertical chute 3 with pins so as to be able to tilt, and one or more upper rotating tables 10, which can be raised and lowered, are attached to the lower vertical chute 3 to control the tilting of the in-furnace chute 5. The in-furnace chute 5 is connected by a book hanging device 6 .

The in-furnace chute 5 is rotated by rotating the rotation motor 14, which causes the reduction gear 15 and gears 17 and 18 to rotate.
The signal is transmitted to the gear 19 supported in the gas seal hopper 8 through the gas seal hopper 8, which rotates the upper rotating table 10 equipped with gears on the outer periphery, which rotates the lower vertical chute 3 and the furnace chute 5 as one unit. do.

Among these gears, the gear 19 has a wide tooth width so as to cover the lifting range of the upper rotating table 10.

The upper rotating table 10 has a structure as shown in FIG. 3 so as to be able to move up and down freely and also to allow the in-furnace chute 5 suspended from the lower vertical chute 3 to rotate.

Although the upper rotating table 10 and the lower vertical chute 3 are separated, the rotation of the upper rotating table 10 is controlled by the lower vertical chute 3 using the side rollers 20.
The lower vertical chute 3 and the in-furnace chute 5 are rotated. Furthermore, a plurality of regulating devices (side gears 22) are provided to prevent the upper rotating table 10 from being eccentric with respect to the furnace center axis.

The in-furnace chute 5 is tilted by the upper rotating table 1.
This is done by controlling the rise and fall of 0.

The upper rotating table 10 is supported by a bracket 24 having a plurality of support rollers 23 and side gears 22, and the plurality of brackets 24 are simultaneously moved up and down via levers 25 by external drive devices 27 and 28. conduct. In the figure, 9 is an upper cover, 29 is an expansion joint, 30 is a coupling, and 33 is a fireproof lining material.

As described above, according to the present invention, in spite of the simple equipment configuration and control mechanism, the desired charging distribution shape can be achieved by combining ring charging, multiple ring charging, and Spiral charging, spot charging, etc. can be selected, which greatly contributes to operational efficiency. In particular, the only gas sealing parts with the outside of the furnace are the rotating parts of the rotation drive part 16 and the upper revolving table lifting drive shaft part 32, and the reliability of the sealing effect is high, making it suitable for the charging distribution control device of high-pressure operating blast furnaces. .

[Brief explanation of the drawing]

FIG. 1 is an assembled sectional view of an embodiment of the present invention. 2 is a detailed view of the upper revolving table and the lifting device in FIG. 1, and FIG. 3 is a detailed view of the lower vertical chute and the upper revolving table in FIG. 1. 9 is an upper cover, 21 is a presser roller, 26 is a lifting device guide, 27 is an electric motor (for lifting and lowering), 28
29 is a reduction gear, 29 is an expansion joint, 30 is a coupling, 31 is a wear-resistant liner, and 33 is a fire-resistant lining material.

Claims (1)

[Claims] 1. In an in-furnace chute drive device in a blast furnace charging device, in which a vertical chute is rotatably provided at the center of the furnace top, and an in-furnace rotating chute is rotatably and tiltably provided at the lower end of the vertical chute, an annular upper A rotating table is provided concentrically with the vertical chute and can be freely rotated and raised and lowered, a lower rotating table is fixed to the lower part of the vertical chute so as to be freely rotating, and the upper rotating table and the furnace rotating chute are connected with a hanging device. 1. An in-furnace chute drive device in a blast furnace charging device, characterized in that the in-furnace rotating chute is connected to each other and configured to be tiltable by raising and lowering an upper rotating table.