JPS6014754Y2 - Raw material charging device for vertical reduction furnace - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a device for charging raw materials into a vertical reduction furnace.

Figure 1 shows the configuration of the top charging device for a high-pressure vertical reduction furnace.

The raw material charged from the charging conveyor 1 is transferred to the charging hopper 2.
It is temporarily stored inside.

Next, the pressure in the equalizing pressure hopper 5 is reduced to atmospheric pressure, the seal valve 4 and the gate valve 3 are opened, and the raw material in the charging hopper 2 is charged into the equalizing pressure hopper 5.

Thereafter, the seal valve 4 and gate 3 are closed, and the pressure in the equalizing pressure hopper 5 is increased to the same pressure as the reduction furnace 8, and the seal valve 7. The gate valve 6 is opened and the raw material in the pressure equalization hopper 5 is charged into the reduction furnace 8.

At this time, between the charging conveyor 1 and the charging hopper 2.

Alternatively, if the distance between the charging hopper 2 and the equalizing pressure hopper 5 is long, the raw material may be cracked, powdered, or classified when it falls and piles up, which may have an adverse effect on the operation of the reduction furnace.

Conventionally, when trying to prevent raw materials from cracking or powdering due to falling raw materials with such charging equipment, a method was used in which raw materials were constantly stored in the hopper and charging and discharging operations were performed while controlling the raw material level. was taken.

However, with this method, it is necessary to balance the amount of raw material charged into the hopper and the amount discharged from the hopper.
Furthermore, it was difficult to accurately control the level within the hopper.

The present invention is provided to improve these problems, and its feature is that charging and discharging are always performed one batch at a time.

(In principle, level control is not required.) Moreover, an inner cylinder is placed in the hopper as a way to shorten the falling distance of the raw material and prevent the raw material from cracking or pulverizing.

The present invention will be explained below based on the drawings.

As shown in FIG. 2, an inner cylinder 9 with an open top and bottom is installed in the hopper 5, particularly in the fall path of the charged raw material.

(Although this embodiment shows the case where the inner cylinder 9 is provided within the equalizing pressure hopper 5, it may also be provided within the charging hopper 2.

) In the above configuration, the raw material is stored in the inner cylinder at the initial stage of charging, but since the volume is smaller than that of the hopper 5, the raw material level rises to the upper part of the inner cylinder 9 relatively quickly.

Thereafter, the raw material overflows from this inner cylinder 9 and flows into the hopper 5.

In this way, it can be expected that the long time of falling of the charged raw material is minimized, most of the charged raw material is stored by overflowing from the inner cylinder 9, and cracking and pulverization of the raw material are minimized.

As explained above, the present invention is capable of minimizing cracking, pulverization, classification, etc. of the charged raw material, which adversely affect the operation of the reduction furnace, by installing the inner cylinder in the hopper.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional device, and FIG. 2 is an explanatory diagram of the device of the present invention. 1...Charging conveyor, 2...Charging hopper, 3.6...Gate valve, 4,7...
・Seal valve, 5... Equal pressure hopper, 8...
...Vertical reduction furnace, 9, curved, inner cylinder.

Claims (1)

[Scope of utility model registration request] In a raw material charging device that charges raw materials into a furnace through a hopper installed at the top, an inner cylinder with an open top and bottom is installed in the raw material falling path in the hopper. A raw material charging device for a vertical reduction furnace featuring: