A large-scale steel ingot electroslag thermal capping device and method with evenly distributed heat source

Abstract

The invention provides a large steel-ingot electro-slag hot-topping device evenly provided with heat sources and a large steel-ingot electro-slag hot-topping method. The device comprises a hydraulic fixing support, a hydraulic transmission rod, a lifting arm, a control cabinet, a trolley, an upper clamping device, a lower clamping device, an upper electrode cross arm, a lower electrode cross arm and a double-layer graphite electrode pair. An inner-layer graphite electrode of the double-layer graphite electrode pair is in a solid column shape, an outer-layer graphite electrode is in a hollow pipe shape, the two electrodes are coaxially arranged, flushed with each other and inserted into liquid premelting slag in a feeder head box; the upper electrode cross arm and the lower electrode cross arm are connected to the lifting arm and connected with the control cabinet. The inner-layer graphite electrode is clamped by the upper clamping device, and the upper clamping device is connected to the upper electrode cross arm. The outer-layer graphite electrode is clamped by the lower clamping device, and the lower clamping device is connected to the lower electrode cross arm. By means of the large steel-ingot electro-slag hot-topping device and the method, the metal yield is increased, the uniformity of steel-ingot chemical components and purity degree of steel are improved; the solidification condition of the centers of the steel ingots is improved; the heating efficiency is high, the heating effect is good, the utilization rate of feeder head molten steel is increased; the utilization rate of the steel ingots is increased.

Description

technical field [0001] The invention belongs to the field of electroslag metallurgy and heavy equipment manufacturing, in particular to a large-scale steel ingot electroslag heat sealing device and method for evenly distributing heat sources. Background technique [0002] With the development of heavy equipment and nuclear power in China, the quality requirements for large steel ingots are getting higher and higher. In the process of preparing large steel ingots, there are problems such as loose shrinkage cavities, which are mainly caused by the insufficient insulation capacity of the riser and the smooth feeding of molten metal. The key to solving the above problems is to improve the insulation capacity of the riser, ensure the smoothness of the feeding channel, and improve the feeding capacity of the riser. [0003] At present, there are already electric heating riser technologies in the industrial field, and these technologies heat and keep the riser through methods such...

AI Technical Summary

Problems solved by technology

This patent is for large cast steel backup rolls, not suitable for large steel ingots

In addition, the patent uses single-electrode electroslag heating, which makes the current loop long and the heating efficiency is low

When the current passes through the large cast steel backup rolls, Joule heat will also be generated, which will adversely affect the original solidification process

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