A metallurgical slag granulation treatment system and method

Abstract

The invention discloses a metallurgical molten slag granulation treatment system, which comprises a rotary drum (2), a vibrating chute (3), a screening device (4), a chain grate machine (5) and a heat-stewed tank (6), wherein the rotary drum (2) is arranged at an outlet of a slag trough (1), and molten slags in the slag trough (1) are dripped on the rotary drum (2) so as to be cooled, and are thrown away by the rotary drum (2) in a fragment type; the fragment type molten slags are collided with the vibrating chute (3) so as to be granulated and collected into the screening device (4) by the vibrating chute (3); the screening device (4) can be used for screening the granulated molten slags; a water spray pipe (51) is arranged on the chain grate machine (5), and water mist sprayed by the water spray pipe (51) can be used for cooling the molten slags; the molten slags conveyed into the heat-stewed tank (6) can be granulated and treated by oxide decomposition under the action of high pressure steam. The invention also discloses a metallurgical molten slag granulation treatment method. According to the metallurgical molten slag granulation treatment system and the metallurgical molten slag granulation treatment method provided by the invention, the hydration characteristics of dicalcium silicate and tricalcium silicate in the metallurgical molten slags can be maintained, and the sensitive heat of the metallurgical molten slags can be effectively recovered.

Description

technical field [0001] The invention relates to a metallurgical slag granulation treatment system and method, belonging to the technical field of metallurgy. Background technique [0002] Metal smelting is to reduce or purify metal elements from ores in the form of simple substances or alloys, and impurity elements such as gangue associated with metals are discharged as metal smelting waste. In pyrometallurgy, the discharged waste is discharged as a melt due to the high-temperature process, the so-called slag. The main components of slag are associated gangue and other impurity elements, as well as various fluxes added to make the slag easy to discharge. [0003] Generally, the composition of slag depends on the gangue associated with the metal. Silicon, calcium, magnesium, and aluminum are the main elements associated with the metal as solid macroelements on the earth, especially silicon. The slag with high silicon content has high viscosity and is difficult to separate f...

AI Technical Summary

Problems solved by technology

There are certain defects in this method for metallurgical slag with high calcium and magnesium (CaO, MgO combined content greater than 50%). The mineral composition in this type of metallurgical slag not only has monocalcium silicate, but also dicalcium silicate, silicon Tricalcium silicate and other series of silicates, dicalcium silicate and tricalcium silicate have fast hydration speed, so water quenching treatment has a great influence on its hydraulic properties

Therefore, the existing water quenching treatment is not suitable for the above metallurgical slag, and the existing water quenching treatment cannot effectively recover the sensible heat of the metallurgical slag

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