Continuous feeding device and method for molten covering slag for continuous casting crystallizer

Abstract

The invention relates to a continuous feeding device and method for molten covering slag for a continuous casting crystallizer. The continuous feeding device comprises a solid slag container, a slag melting crucible, a molten slag installation damper, a molten slag flow control damper and a molten slag injection channel, wherein a lower solid slag discharging pipeline is arranged on the lower portion of the solid slag container; a slag inlet is formed in the upper portion of the slag melting crucible, and a slag discharging channel is formed in the lower portion of the slag melting crucible; a slag melting electrode is arranged at the center inside the slag melting crucible, a bottom electrode is arranged at the bottom of the slag melting crucible, and a crucible heat preservation layer is arranged on the outside of the slag melting crucible; the molten slag flow control damper is vertically inserted in the part, on the outer side of the molten slag installation damper, of the slag discharging channel, and the molten slag flow control damper moves up and down so that a double-damper hole type flow control mode can be formed; one end of the molten slag injection channel is connected with the outlet end of the slag discharging channel in the lower portion of the slag melting crucible, and the other end of the molten slag injection channel is connected with the continuous casting crystallizer. The continuous feeding device integrates the processes of melting the covering slag, controlling the flow and injecting the covering slag into the crystallizer; in the overall process of the continuous casting technology, the molten covering slag is injected to the surface of molten steel in the crystallizer, and the continuous feeding device can be used for various continuous casting machines.

Description

technical field [0001] The invention relates to continuous casting technology, in particular to a continuous supply device and method for molten mold slag used in a continuous casting crystallizer. Background technique [0002] During the continuous casting of molten steel, solid mold slag is usually added to the upper part of the molten steel in the mold of the continuous casting machine, and the solid mold slag is melted by the heat of molten steel. The mold slag plays two key roles: one is to separate the molten steel from the gas after melting, and prevent the molten steel from being oxidized; To the lubrication, so that the continuous casting process can be carried out smoothly. Another is to keep the upper part of the molten steel insulated to prevent the surface temperature of the molten steel from dropping rapidly. [0003] At present, the mold slag used in continuous casting is powder or granular, and three layers are formed on the surface of molten steel in the c...

AI Technical Summary

Problems solved by technology

The patent uses a stopper rod to control the slag flow, which is difficult to accurately control on site

One is that the stopper itself is melted and lost during use, and the shape is difficult to guarantee

Second, it is difficult to guarantee the outlet temperature of the liquid slag. When the slag flow is opened and closed repeatedly, it is easy to slag

For this reason, this patent proposes to use platinum or platinum-rhodium precious metals to make the stopper head and the liquid slag outlet, and the manufacturing cost is a big problem.

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