The method of cleaning the sticky slag at the bottom of the ladle

Abstract

The invention discloses a method for cleaning sticky slag at the bottom of a ladle. It includes converter smelting billet rebar, the end point temperature is controlled at ≥ 1630°C, and the end point carbon content is controlled at 0.06% to 0.15%; the steel ladle to be processed is transported to the converter tapping position, and fluorite and silicon carbide are added to the bottom of the ladle. Tapping; during the tapping process of the converter, carbon powder and silicon-manganese alloy are added to control the composition of molten steel: C≥0.2%; Si: 0.2%-0.6%; Mn: 1.2%-1.5%; Alt≤0.0030%; After steel, the ladle is transported to the argon blowing station for argon blowing, and the composition of molten steel top slag is controlled: CaO: 35% ~ 40%, SiO 2 :30%~35%,Al 2 o 3 ≤10%, MgO≤10%; pour out after the argon station leaves the station, the pouring process temperature is ≥1520°C, pour out the pouring slag after casting. The invention aims at the problem that after the slab aluminum-killed molten steel is cast, the bottom of the ladle is more precipitated due to the deposition of high-melting point substances, and provides a method for cleaning the sticky slag at the bottom of the ladle, and the cleaned ladle restores its serviceability, and the method The effect is remarkable, the operation is convenient, and the cost is not increased.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for cleaning sticky slag at the bottom of a ladle. Background technique [0002] Ladles are important equipment for containing molten steel in the field of metallurgy, and their performance directly affects the stability and smoothness of production in steel mills. After the ladle is poured with molten steel, the slag remaining at the bottom of the ladle will continuously precipitate high melting point substances as the temperature drops, and deposit on the bottom of the ladle to form sticky slag. With the more deposition of sticky slag at the bottom of the cladding, it will cause many unfavorable factors to the production of steel mills. First of all, there is a lot of slag sticking to the bottom of the ladle, which greatly increases the weight of the empty ladle, which seriously affects the steel production. At the same time, the risk of overweight d...

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problem that after the slab aluminum-killed molten steel is poured, the pouring slag is not clean at the bottom of the ladle due to the precipitation of more high-melting point substances and deposits, and provides a method for cleaning the sticky slag at the bottom of the ladle, and the ladle after cleaning can be restored Its performance, and the method is effective, easy to operate, and does not increase the cost