JPS58662Y2 - Air array bed - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for cooling and accumulating slag granulated by a method such as wind crushing in a process of recycling slag produced in a blast furnace, converter, etc.

Recently, various studies have been conducted on the reuse of slag produced in blast furnaces and converters, such as wind crushing technology that blows blast furnace slag with wind to produce artificial sand, or rotational centrifugal force from rotating drums and rotating plates. Granulation techniques have been proposed.

However, in such an artificial sand production process, after producing high-temperature granular slag by wind crushing the molten slag,
A process of collecting and cooling this is necessary.

The present invention was proposed in view of such requests.The plurality of supports formed in steps downward in order toward the downstream side have a surface, and each support has a vertical surface that forms the boundary between the surfaces. Each of the open trays is equipped with a bed body provided with a nozzle for blowing the granular slag on the surface downstream, and each of these trays is equipped with a means for transferring the granular slag accumulated downstream of the surface to the other side. Provide aeration beds.

Molten slag at around 1,500°C taken out from a blast furnace, converter, etc. is first converted into granular slag at around 1,000°C by a granulator.

Examples of the granulation device include a pan filled with molten slag, a device that performs wind granulation by blowing the slag flowing down from a gutter, or a granulation device that uses a rotating centrifugal force such as a rotating drum or rotating plate.

In this case, the average particle diameter of the slag is 1 to 2 mmφ, and 10
Scattered in ~15m square.

According to the device of the present invention, the stepped receiver receives the scattered granular slag on its surface, and the slag flows together with the fluid along the surface of the multi-stage receiver due to the cooling fluid blown out from the nozzle.

This sends the slag downstream and cools it.
The receiver is collected downstream of the surface and transferred to the next step by a transfer means provided downstream.

The amount of fluid is adjusted as appropriate depending on the state, substance, and amount of the slag.

Note that it is desirable to provide a protective wall around the aeration bed of the present invention to prevent slag from scattering.

In the apparatus of the present invention, air is generally used as the cooling fluid, but it can be selected as appropriate depending on the state, substance, amount, purpose, and use of the slag.

For example, the granular slag can be modified by flowing CO2, SO2, etc.

Furthermore, if priority is given to the cooling effect, water or steam can be flown, or a mixture of these and air can be flown.

Next, one embodiment of the device of the present invention will be described based on the drawings.

In Figures 1 to 3, reference numeral 1 denotes an aeration bed body having sloped surfaces 2 formed in several steps downward in order toward the downstream, and partitioning material is provided on the vertical side forming the boundary between each sloped surface 2. A nozzle 3 having an appropriately sized opening is provided, and the nozzle 3 communicates with a pipe 4, which is connected to a drive source 5 such as a blower or a compressor.

6 is an iron belt conveyor provided downstream of the bed body 2, 7 is a pulley provided at both ends thereof, 8 is a bearing that rotatably supports the pulley 7, 9 is a speed reducer, and 10 is a drive motor.

11 is a frame for the bed body 2, 12 is a side wall for preventing slag from scattering, and 13 is a downstream wall provided at an end above the belt conveyor 6 for the same purpose.

The molten slag is finely granulated by the granulating device installed in section A in FIG.
Since the air is blown out from the slanted surface 2, the air is blown downstream along each inclined surface 2.

The amount of air is adjusted by opening and closing the valve on the drive source 5 side. In this way, the granular slag B is cooled, and since it is separated by the side wall 12 and the downstream wall 13, it accumulates on the belt conveyor 6. side wall 1 by conveyor belt 6
Sent to the outside of 2.

After this, it is connected to known processing equipment, such as truck loading or feeding into a hopper.

As described above, according to the present device, the granulated and scattered slag can be simply and effectively cooled and collected.

That is, cooling is accelerated by air injection, and particles do not fuse together.

Note that the granular slag can be reformed by flowing CO2 or SO2 gas other than air as a cooling fluid, or the cooling effect can be further increased by flowing water, steam, or a mixture of these and air.

That is, the body can be appropriately selected depending on the state, physical properties, quantity, purpose, and use of the slag.

Furthermore, in this device, by imparting magnetism to the iron belt conveyor 6, the iron content in the granular slag can be recovered at the same time.

Figure 4 shows another embodiment of the device of the present invention, in which the vertical sides with the openings of the nozzle 3' are directed toward the center of each other, so that the fluid is injected toward the center, which further enhances the effect of accumulating granular slag. be able to.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the device of the present invention; Figure 1 is a plan view, Figure 2 is an elevation view, Figure 3 is a perspective view showing only the aeration bed main body 2, and Figure 4 is a main body of the present invention. FIG. 7 is a plan view showing another embodiment of the invention device. 1.1'... Aeration bed body, 2,
2'...Slanted surface, 3,3'...Nozzle, 6...Iron belt conveyor, 11...
- Frame, 12... side wall, 13... downstream wall.

Claims (1)

[Scope of utility model registration request] A plurality of receivers formed with steps downward in order toward the downstream side have surfaces, and each receiver opens on the vertical side that forms the boundary between the surfaces, and each receiver blows the granular slag on the surface toward the downstream side. 1. An aeration bed comprising: a bed body provided with a nozzle for flowing; and means for transferring granular slag accumulated on the downstream side of the receiving surface to the other side.