Vacuum electroslag furnace with electrode rotation and vibration functions

Abstract

The invention relates to a vacuum electroslag furnace with electrode rotation and vibration functions. The electroslag furnace comprises a cross arm stand column, a cross arm, a conductive material rod, an atmosphere protection cover and a crystallizer, the cross arm is mounted on the stand column, a conductive material rod platform and a conductive material rod platform lifting mechanism are arranged above a cross arm platform on one side of the cross ar, the conductive material rod for clamping an electrode is mounted on the conductive material rod platform, the conductive material rod can penetrate through the cross arm platform to move up and down under the action of the platform lifting mechanism, and an electrode rotating mechanism and an electrode vibrating mechanism are arranged on a rod head of the conductive material rod; and the upper end of the atmosphere protection cover is fixedly connected with the cross arm platform, and the crystallizer is arranged below the atmosphere protection cover. In the electroslag casting process, the electroslag furnace enables the shape of a metal molten pool to be shallower and flatter gradually, steel ingots are prevented from being hollow, the grain structure of the steel ingots is tighter and finer, dendritic crystals tend to grow axially, and good equipment conditions are created for smelting high-quality electroslag steel.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to a vacuum electroslag furnace with electrode rotation and vibration functions. Background technique [0002] Electroslag furnaces designed and manufactured at home and abroad generally do not have a vacuum melting environment. Some gas-preserved electroslag furnaces can discharge part of hydrogen and oxygen harmful gases, and cannot avoid the occurrence of some active metal oxidation reactions. At present, in electroslag furnaces, especially cantilever single-column electroslag furnaces, the rigidity of the column is poor, and the lifting and lowering of the cross arm is unstable. Scratched with the inner cylinder of the crystallizer, a current short circuit accident occurred. [0003] In addition, during the smelting process of the general electroslag furnace, the metal droplet will drip down at the center of the electrode, and the heat will be concentrated in th...

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Problems solved by technology

[0002] Electroslag furnaces designed and manufactured at home and abroad generally do not have a vacuum melting environment. Some gas-preserved electroslag furnaces can discharge a part of hydrogen and oxygen harmful gases, and cannot avoid the occurrence of some active metal oxidation reactions.

At present, in electroslag furnaces, especially cantilever single-column electroslag furnaces, the rigidity of the column is poor, and the lifting and lowering of the cross arm is unstable. Scratched against the inner cylinder of the crystallizer, a current short circuit accident occurred

[0003] In addition, during the smelting process of the general electroslag furnace, the metal droplet will drip down at the center of the electrode, and the heat will be concentrated in the center of the slag pool, causing the metal molten pool to form a deep V shape. After the steel ingot crystallizes, the core structure is loose. , it is easy to produce shrinkage voids

Due to the larger particles formed by the molten droplet and the short drop path, the non-metallic harmful elements cannot be well filtered through the slag layer, which reduces the quality of the steel ingot. Even if a few are equipped with electrode rotating devices, in the process of electroslag casting The electrode rotation is only a uniform motion, the metal droplet will not drop smoothly in time, the droplet refinement is not obvious, and the removal of harmful non-metallic impurities is limited, which makes little contribution to the improvement and improvement of the internal quality of the steel ingot

The vast majority of micro-electroslag furnaces with electrode rotation devices are tested in laboratories. The scale of several kilograms to tens of kilograms is very small, and there is no industrialized large-scale production practice. It is of little significance to widely promote the technology of electrode rotation in factories and enterprises.

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