SU381250A1 - Crystallizer - Google Patents

Description

I

Decoupling special metallurgy equipment.

Electroslag furnace headings of valve bodies are known, consisting of detachable elements with cooling channels.

In the process of fitting the reinforcement housings, the formation of nozzles occurs as a result of the flow of slag and metal baths in the water-cooling elements of the crystallizer forming the nozzles and the crystallization of the metal.

Due to the fact that during electrolytic remelting, the main heat release occurs in the area of the consumable electrode, the temperature of the slag and metal baths at a large distance from the electrode decreases.

When using such a crystallizer to obtain reinforcement housings, due to the same intensity of cooling of the melted pipe over its entire length, it is not possible to qualitatively form branch pipes having a greater length.

The aim of the invention is to change the intensity of cooling along the length of the nozzle and to ensure that high-quality casting is obtained with nozzles of a given length.

For this purpose, the supply of the proposed cooling water crystallizer is located in the zone of the connection between the nozzle and the casing (practically in the heat release zone), and the outlet is at the end of the nozzle. This creates a directional flow of water in a horizontal direction (and, and areas of the slag and metal baths that are remote from the heat release zone are cooled with water that has a higher temperature than at the entrance.

Changing the intensity of cooling along the length of the nozzle can also be further enhanced by the implementation of a variable pitch and change in the thickness of the water-cooled element along the length of the nozzle in the water-cooled epement forming the nozzle of the spiral channel for the passage of water.

FIG. 1 and 2 shows the proposed mold in the smelting process.

The mold includes consumable electrodes 1, slag bath 2, metal bath 3, element 4, which forms the nipple, water passage 5, housing 6, inlet fitting 7 and outlet fitting 8.

In the water-cooled element 4 forming the nozzle, the inlet fitting 7

for water, they are located in the zone of connection of the nozzle with the housing, i.e. near the consumable electrode 1, and the output at the end of the nozzle, i.e. away from the pact of the moving electrode. In this case, a directed flow is given by cooling water to the side of the metal 3 and slag 4 baths, which have a lower temperature.

Due to the increased water temperature, these areas of the slag and metal baths are cooled less intensively.

To ensure that the temperature of the water can be supplied through the annular channel 5 (Fig. 2), the cooling rate of remote areas of the metal and slag baths can be reduced even more by using a variable pitch in the water-cooled element or increasing the wall thickness of this element, t. e. so that 6i-f & t.

Claims (3)

Invention Formula i. A mold for electroslag smelting of valve bodies, consisting of detachable elements with cooling channels, characterized in that, in order to reduce the intensity of metal cooling along the length of the produced pipes, the cooling channels are arranged in a spiral. 2. A mold according to claim 1, characterized in that the spiral channels are made with a variable pitch increasing / with distance from the working cavity of the mold. 3. The mold on PP. 1 and 2, characterized in that the walls of the sections forming the nozzles are made with expansion towards the outer end. Figg ig.1