Liquid slag mechanical centrifugal granulation anti-sticking device and preheating method thereof

Abstract

The invention discloses a liquid slag mechanical centrifugal granulation anti-sticking device which comprises a granulation bin, wherein a feeding buffer bag is arranged in the middle at the top of the granulating bin, and a slag outlet is formed in a position, close to one side, at the bottom of the granulation bin; a granulation disk unit is disposed below the feeding buffer bag; the granulationdisk unit comprises a cylindrical support frame and a granulation disk; a transmission shaft is fixed at the bottom of the granulation disk; the cylindrical support frame is provided with an upper partition plate and a lower partition plate; the granulation disk and the upper partition plate define a heating chamber in an encircling manner; the upper partition plate and the lower partition platedefine an insulation chamber in an encircling manner; a cooling chamber is disposed below the lower partition plate; a heating disk is arranged at the bottom of the granulation disk; a coke oven gas nozzle is connected to the bottom of the heating disk by using metal coal gas conveying pipe; a lighting-up tuyere is formed in the cylindrical side wall of the heating chamber; an ignition device is connected to the lighting-up tuyere through a piston rod end of a cylinder. The liquid slag mechanical centrifugal granulation anti-sticking device can effectively prevent formation of a slag shell onthe granulation disk, and provides a powerful guarantee for long-term and stable operation of a high-temperature slag waste heat recovery system.

Description

technical field [0001] The invention relates to the technical field of liquid slag treatment, in particular to a liquid slag mechanical centrifugal granulation anti-bonding device and a preheating method thereof. Background technique [0002] High-temperature slag is a major by-product in the production process of the iron and steel industry. The discharge temperature is between 1400 and 1550 ° C. 3 The sensible heat of kJ, which is equivalent to 60kg of standard coal, is a high-quality waste heat and energy resource, but it has not been well recycled because of its characteristics such as large viscosity changes with temperature and low thermal conductivity. At present, the water flushing slag process is commonly used in the treatment of high temperature slag, but it will bring many disadvantages: the sensible heat of the high temperature slag at 1400-1550 °C has not been recycled, a lot of water resources are wasted, and a large amount of SO is generated in the process of ...

AI Technical Summary

Problems solved by technology

At present, the water flushing slag process is commonly used in the treatment of high temperature slag, but it will bring many disadvantages: the sensible heat of the high temperature slag at 1400-1550 °C has not been recycled, wasting a lot of water resources, and a large amount of SO is generated in the process of water flushing slag 2 、H 2 S and other harmful gases and fine particles

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