JPH07305969A - Pan for air-cooling solidification of molten slag - Google Patents

Abstract

PURPOSE:To design a pan to be air-cooled efficiently and enable cooling off molten slag quickly by forming a number of radiating fins integrally on the outer sides of the pan. CONSTITUTION:A number of pans 1, each being a square, shallow vessel, are arranged on a conveyor 2 in a row and moved horizontally. From a furnace for melting disposal of waste, through a molten-slag outlet 4 therein, molten slag 5 is discharged onto each of the pans 1 moving on the conveyor 2 by such a fixed amount as will make the slag 5 collect in a thickness of several centimeters or less 10 each pan 1. The outer, lower sides of each pan 1 integrally have radiating fins 3, on which cooling air is blown by an air-cooling fan. As a result, the pans 1 are air-cooled efficiently and the molten slag 5 can be cooled off quickly. Therefore it is not what is porous but solid grains that the slag forms on solidification.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten slag air-cooling solidifying pan for solidifying molten slag discharged from a waste melting treatment furnace by air cooling.

[0002]

2. Description of the Related Art Wastes such as municipal waste incineration residue and sludge incineration residue are melted in an arc type melting treatment furnace, and the molten slag is dropped into a water tank, rapidly cooled and solidified into small lumps, and then landfilled for disposal. Thus, it has been conventionally attempted to prevent the occurrence of secondary pollution by eliminating the risk that heavy metals and other harmful substances will be eluted into the ground from the waste.

[0003]

In the treatment method described above, the molten slag discharged from the melting treatment furnace is solidified by dropping it into water and rapidly cooling it. Therefore, a large amount of cooling water was required, and the treatment of water contaminated by the cooling was a new problem. Further, in the water-cooled slag, many fibrous or porous slags are mixed in the slag to weaken the strength of the slag, and there is a safety problem in handling the slag.

Therefore, it has been considered to cool the molten slag by air cooling, but it is difficult to rapidly cool the molten slag by ordinary air cooling, so that the molten slag becomes large lumps and metal is also mixed in the slag, so crushing is easy. However, there is a problem that it becomes difficult to carry out subsequent processes such as transportation, storage, reuse, and landfill.

[0005]

The molten slag air-cooling and solidifying pan of the present invention is intended to solve the above-mentioned problems, and is characterized in that a large number of heat-dissipating fins are integrally formed on the outer surface thereof. To do.

[0006]

[Function] The radiating fins allow the pan to be efficiently air-cooled, and the molten slag can be rapidly cooled.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A square pan 1 shown in the drawing is made of a heat-resistant material such as general structural rolled steel SS400, which is arranged in a row on a conveyor 2 and moves substantially horizontally in the direction of the arrow. Is configured. Radiating fins 3, 3, 3, ... Are integrally formed on the outer lower surface of the pan 1.

Reference numeral 4 denotes a molten slag discharge port of a waste melting treatment furnace, and the molten slag 5 is discharged from the discharge port 4 onto a pan 1 moving on a conveyor 2 to a substantially constant amount and is discharged into each of the pans 1. The molten slag 5 is set to have a thickness of several centimeters or less. An air-cooling fan (not shown) for blowing cold air toward the moving pan 1 is provided on the side of the conveyor 2, and the cool air blows the gap between the heat radiation fins 3, 3, 3 ,. By passing, the bread 1 can be efficiently cooled.

It should be noted that the thickness of the steel material constituting the pan 1 is much thinner than that of the conventional casting container, which is more than ten millimeters, and the heat conductivity is improved to improve the heat dissipation fins 3, 3.
The heat is dissipated through 3, 3, ... Efficiently.

Therefore, the molten slag 5 discharged to the pan 1 is rapidly cooled and solidified in the pan 1, and cracks are formed in the pan 1.
By turning over the bread 1 and taking out the solidified product from the inside of the bread 1, it is possible to finely break the cracks to obtain a granular or small lump-shaped solidified product.

By making the bread 1 thin and making the heat radiation good in this way, it is possible to prevent the temperature of the bread 1 from rising due to heat storage even if the bread 1 is repeatedly used.
Further, by immersing the bread 1 in a water tank and cooling the bread 1 as necessary, the above-mentioned heat storage can be more surely prevented. In this case, unlike the conventional method in which the molten slag 5 is directly dropped into the water tank, there is an advantage that the cooling water is not contaminated.

[0012]

As described above, according to the molten slag air-cooling and solidifying pan of the present invention, the molten slag can be efficiently air-cooled without contaminating the cooling water, so that the solidified product can be easily crushed into small lumps or granules. Thus, there is a beneficial effect of facilitating reuse such as transportation, storage, magnetic separation, or landfill. Further, unlike water granulation, there is an effect that a fibrous slag and a porous slag are not generated and a solidified slag having a solid grain shape can be formed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a pan for solidifying air-cooled molten slag according to the present invention.

FIG. 2 is a vertical cross-sectional view of the molten slag air-cooling and solidifying pan of FIG.

[Explanation of symbols]

 1 Pan 2 Conveyor 3 Heat dissipation fin 4 Molten slag discharge port 5 Molten slag

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C04B 5/00 B

Claims (1)

[Claims] 1. A shallow plate-shaped pan for solidifying air-cooled molten slag, wherein a large number of fins for heat dissipation are integrally formed on the outer surface.