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

Abstract

A large steel ingot electroslag thermal capping device and method with uniform heat source distribution. The device includes a hydraulic fixed support, a hydraulic transmission rod, a lifting arm, a control cabinet, a trolley, an upper clamper, a lower clamper, an upper electrode cross arm, The lower electrode cross arm and the double-layer graphite electrode pair; the inner graphite electrode of the double-layer graphite electrode pair is a solid columnar shape, and the outer graphite electrode is a hollow tubular shape. The two electrodes are coaxially aligned and inserted into the liquid preheater in the riser box. In the slag; the upper electrode cross arm and the lower electrode cross arm are connected to the lifting arm and connected to the control cabinet; the inner graphite electrode is held by the upper holder, and the upper holder is connected to the upper electrode cross arm; The outer graphite electrode is held by a lower holder, which is connected to the lower electrode cross arm. The invention increases the metal yield, improves the uniformity of the chemical composition of the steel ingot and the purity of the steel, improves the solidification conditions in the center of the steel ingot, has high heating efficiency and good heating effect, improves the utilization rate of the riser molten steel, and improves the utilization rate of the steel ingot.

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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