Cooling treatment system and cooling treatment method of molten slag

Abstract

Provided is a cooling treatment system of molten slag which enables a mass treatment of molten slag without causing damage to a cooling drum due to the drop load of molten slag, and can facilitate handling and post-treatment of cooling treated slag. The cooling treatment system of molten slag comprises a single rotatable horizontal cooling drum (1) which cools molten slag by sticking the molten slag to the outer circumferential drum surface (100), and a gutter (2) for supplying molten slag to the horizontal cooling drum (1), wherein the slag cooled while sticking to the drum surface (100) is separated therefrom as the horizontal cooling drum (1) rotates and discharged in one direction. Since the molten slag is poured through the gutter (2), the drop load of molten slag is not applied to the cooling drum (1), and, since the cooling treated slag is discharged in one direction, handling and post-treatment of cooling treated slag are facilitated.

Description

technical field [0001] The present invention relates to a cooling drum type molten slag cooling treatment device, a method for cooling molten slag using the device, and a method for manufacturing slag products. Background technique [0002] The molten slag (for example, steelmaking slag) generated in the steel manufacturing process is often left to cool in a cooling field, and then cooled by sprinkling water. In addition, there is also a method of spraying water into an iron container called a disk cooling method. [0003] On the other hand, as an apparatus for cooling slag such as blast furnace slag and waste incineration ash slag, a double-drum slag cooling apparatus is known (for example, Japanese Patent No. 3613106). This slag cooling treatment device is equipped with a pair of cooling drums, the pair of cooling drums are parallel in the horizontal direction, and have a rotation direction in which the opposing outer peripheral parts rotate upwards, and the cooling drums...

AI Technical Summary

Problems solved by technology

[0011] (b) In the case of cooling relatively low-viscosity molten slag such as blast furnace slag with the conventional double-drum slag cooling device, only a relatively thin slag solidified body with a thickness of about 2 to 3 mm can be obtained, And even if they are crushed into granules, they cannot meet the required particle size of coarse aggregate or roadbed materials.

In addition, in order to make the thinner slag solidified into glass, the water retention will be reduced, and it can be said that it is not suitable for roadbed materials, etc.

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