Slag binding agent for preventing slag ladle as well as production process thereof

Abstract

The invention provides a slag binding agent for preventing a slag ladle as well as a production process thereof. The production process comprises the following steps: cooling an aluminum-silicon carbide-carbon brick used by a torpedo ladle to 0.1-29.5 DEG C; placing the brick in a PC0606 jaw crusher to be crush to 5-50mm particles; then, adding the particles into a 4R3216 Raymond mill to be processed to powder which is below 3mm; mixing the powder with steel slag micropowder which is below 3mm in mass percent ratio of 15:85; and placing the mixture in a VI type forced stirring mixer to be uniformly stirred and mixed to obtain the slag binding agent, wherein the control time of adding 1 ton of materials is 15 minutes, and the stirring time is 15-20 minutes. When the slag binding agent is used, water is added into the inner wall of an empty slag ladle through a spray gun of a PB type semidry method gunning machine to spray, and the coating thickness is 0.5-2cm. The water addition of water added to spray accounts for 8-12% of total weight of the slag binding agent used.

Description

technical field [0001] The invention relates to the recycling of waste refractory materials, especially to make a slag sticky agent, which is used for spraying the inner wall of the slag tank, effectively isolates the direct contact between the high-temperature steel slag and the inner wall, and achieves the effect of smoothly turning the slag tank. Background technique [0002] The material of the slag tank is steel castings. The temperature of the liquid steel slag in the converter is 1560-1720°C. The high-temperature liquid steel slag impacts the slag tank. No matter the steel slag with high alkalinity or low alkalinity, the liquid steel slag and the inner wall of the slag tank made of cast steel Contact, the cast steel material of the slag tank body absorbs heat quickly, and the heat conduction is fast, so that the liquid steel slag that first contacts the cast steel material of the slag tank wall quickly solidifies into a layer of 1-5cm slag film, and the first precipita...

AI Technical Summary

Problems solved by technology

[0002] The material of the slag tank is steel castings. The temperature of the liquid steel slag in the converter is 1560-1720°C. The high-temperature liquid steel slag impacts the slag tank. No matter the steel slag with high alkalinity or low alkalinity, the liquid steel slag and the inner wall of the slag tank made of cast steel Contact, the cast steel material of the slag tank body absorbs heat quickly, and the heat conduction is fast, so that the liquid steel slag that first contacts the cast steel material of the slag tank wall quickly solidifies into a layer of 1-5cm slag film, and the first precipitate under the condition of rapid cooling and solidification is C 2 S(2CaO SiO 2 ), its melting point is greater than 2130°C, once the slag film is formed, the surface of the slag tank body will continue to convect and dissipate heat to the surrounding environment, the temperature rise of the cast steel material of the slag tank is limited, and the temperature rises too fast and too high, causing the slag tank to become red and deformed. And the temperature of the liquid steel slag in the slag tank is gradually reduced, so the slag film is difficult to remelt; but the oxide molecules in the middle of the steel slag and the material on the surface of the steel casting are under the action of high temperature, the mutual diffusion between the molecules, the slag Molecules attach to the uneven area on the surface of the slag tank, making it difficult to turn over the slag tank