Method and device for controlling flow rate of poured molten metal

Abstract

The invention relates to a method and a device for controlling flow rate of poured molten metal. In the method, a main traveling crane hook is used for hoisting a metal tank, an auxiliary traveling crane hook is used for hooking a hanging scaffold at the rear lower part of the metal tank, and the flow rate of the molten metal is controlled by controlling the upward hoisting motion of the auxiliary traveling crane hook into variable-speed motion so as to further control the generating quantity of secondary smoke and the quality of a casting. The device comprises a controller, a frequency converter, an operation box and a connecting cable, wherein the operation box is arranged inside a traveling crane operating chamber, a program for controlling the rotating speed of a motor for driving the auxiliary traveling crane hook is set in the controller, and the controller is used for directly controlling the rotating speed of the motor through the frequency converter. Compared with the prior art, the method and the device disclosed by the invention have the advantage that by controlling the ascending motion of the auxiliary traveling crane hook from uniform motion into the variable-speed motion, the flow rate of the molten metal which is poured into a smelting furnace or a casting die from the metal tank is uniform and controllable, so that the generating quantity of the secondary smoke is reduced and the quality of the casting is improved at the same time.

Description

technical field [0001] The invention relates to the fields of smelting, casting and environmental protection, in particular to a method and device for controlling the pouring flow rate of metal liquid. Background technique [0002] In the metallurgical and foundry industry, it is often necessary to pour the melted metal liquid into industrial smelting furnaces such as converters, electric furnaces, argon-oxygen furnaces for re-smelting or pour the smelted metal liquid into casting molds for shape casting. Generally, the metal tank is hung by the main hook of the crane, and the suspension plate at the rear and lower part of the metal tank is hooked by the auxiliary hook of the crane, and then lifted upwards, the metal liquid is poured from the metal tank into the smelting furnace or the casting mold. During this process, due to the friction and heat mass exchange between the high-temperature liquid metal flow and the surrounding air, and the extrusion of the air in the furnac...

AI Technical Summary

Problems solved by technology

At home and abroad, the secondary flue gas generated during the casting process of metal liquid is not treated because of its small amount, and the quality of castings is also unstable due to the instability of manual control of the flow of metal liquid.

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