SU1227321A1 - Automatic control of metal flow through open mould - Google Patents

Description

11227321

The invention relates to metallurgy, and specifically to the continuous casting of metals.

The purpose of the invention is to increase the efficiency of the regulator by increasing the accuracy of 5 maintaining a given flow rate.

The drawing shows the controller, a general view.

The regulator contains a refractory tube 1 enclosed by a hollow water-cooling by a tangent inductor 2, the cross section of which has the shape of a triangle, the apex of which is directed towards the crystallizer, and the angle at the apex is 10-13.

The inductor is enclosed in a dielectric shell 3 with a coolant circulating in it.

The inductor 2 of the regulator is made of a bimetallic strip with different conductivities, while the outer part is made of metal, the electrical conductivity of which is higher than the conductivity of the metal of the inner part. - When reducing the surface level

The regulator operates with the following m-25 metal 4 in the mold 5 by an increase, the total impedance of the inductor-dosing system — the metal of the crystallizer — is reduced and the inductor current decreases.

which is directed towards the mold, and the angle at the tip of the component is € 10–15, ensures that the volume of the deformable metal under the inductor is insignificant and the accuracy of the regulator is almost not affected

If the vertex angle is less than 10, then the conductor portion of the inductor overheats due to unacceptable current density in the inductor material.

If the angle at the vertex is more than 15 °, then the volume of the metal deformable under the inductor increases due to an increase in the fraction of the radial component of the magnetic field, and the accuracy of maintaining the metal consumption decreases.

The inductor is made of a bimetallic strip with different conductivities to further reduce the volume of the melt deformed under the inductor 20 and increase the accuracy of the regulator.

15

With the help of a regulated power supply, the current value of the inductor is set, which provides the rac ponderomotive force acting

the course of the metal is somewhat larger than the required metal and is functional. As the inductor current is filled with metal 4, it decreases and

the consumption of metal through the dispenser is increased, the actuator is in compliance with the costs of the metal passing through the dispenser and drawn from the mold by the casting machine.

Since the regulator inductor is made in the form of a triangular profile with an apex angle equal to 10-15, and from a bimetallic strip of different conductivity (the outer part of the inductor is made of a larger metal

mold 5, the impedance of the dosing inductor system, the mold metal, is reduced. Since the voltage on the metering inductor is kept constant, this decrease in the impedance of the inductor-metal system leads to an increase in the inductor current.

An increase in the inductor current causes an increase in the radial component of the ponderomotive force, leading to a decrease in metal consumption. This reduction in the metal supply occurs until the moment when the flow rate of the metal supplied by the dispenser to the mold and drawn out from the mold by the casting machine is consistent with the costs.

Inductor having a triangular cross-section, vertex

ti, internally - from a metal of lower conductivity) J then the accuracy of maintaining the metal consumption increases by 20-30% due to a slight (compared with the known) change in the shape of the inductor profile and the volume deformed under the inductor of the molten metal.

Editor A.Revin

Compiled by V. Balashov

Tehred V. Kadar Proof-reader I. Erdeyi

Order 2244/10 Circulation 757 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

When the surface level decreases

which is directed towards the crystallizer, and the angle at the tip of the component is 10-15, which ensures that the volume of the deformable metal under the inductor is insignificant and practically does not affect the accuracy of the regulator.

If the vertex angle is less than 10, then the conductor portion of the inductor overheats due to unacceptable current density in the inductor material.

If the angle at the vertex is more than 15 °, then the volume of the metal deformable under the inductor increases due to an increase in the fraction of the radial component of the magnetic field, and the accuracy of maintaining the metal consumption decreases.

The inductor is made of a bimetallic strip with different conductivities to further reduce the volume of the melt deformed under the inductor and increase the accuracy of the regulator.

Ponderomotive force acting

ti, internally - from a metal of lower conductivity) J then the accuracy of maintaining the metal consumption increases by 20-30% due to a slight (in comparison with the known) change in the shape of the inductor profile and the volume deformed under the inductor of the molten metal.

Claims (2)

1. AUTOMATIC METAL CONSUMPTION REGULATOR IN THE CRYSTALIZER, containing a refractory pipe covered by a hollow water-cooled inductor, characterized in that, in order to increase the efficiency of the regulator by increasing the accuracy of maintaining a given flow rate, the inductor in the cross section is made in the form of a triangle, the apex of which is directed to the side mold, and the angle at the apex is 10-15 °. 2. The regulator pop. 1, characterized in that the inductor is made of a bimetallic strip with different conductivity, while its outer part is made of metal, the electrical conductivity of which is higher than the conductivity of the metal of the inner part. SU „„ 1227321