Electric furnace

Abstract

The invention relates to an electric furnace which comprises a furnace body, an elastic frame and an electrode, wherein the furnace body, of which the side walls incline inwards from top to bottom, comprises a furnace shell and a furnace cover; the furnace shell is provided with a product discharge port and a slag discharge port; the top end of the furnace shell is opened, and the side walls and the bottom wall of the furnace shell are provided with a refractory material layer; the furnace cover is arranged on the top end of the furnace shell to cover the opened top end of the furnace shell; the elastic frame is arranged outside the furnace shell to hoop the furnace shell; the electrode extends into the furnace body after penetrating the furnace cover from the top of the furnace body, and can move from top to bottom. The electric furnace of the invention has good integrated expansibility of the furnace body, i.e. the furnace body is expanded stably, uniformly and synchronously so that the service life of the furnace body is prolonged, the maintenance operation is reduced, and the cost is decreased.

Description

technical field [0001] The invention relates to an electric furnace, in particular to an electric furnace with good overall expansion performance of a furnace body. Background technique [0002] Electric furnaces are widely used in the field of metal smelting, such as ferronickel, special steel and other non-ferrous metals. [0003] The furnace body of an electric furnace usually consists of a furnace shell and a refractory layer arranged in the furnace shell. For example, Chinese patent application CN101029794 discloses an electric arc furnace. The side walls of the furnace body of the above-mentioned electric furnace are usually vertical walls, that is to say , the side wall of the furnace body is generally in a vertical relationship with the horizontal plane. Since the temperature in the furnace body is very high during the smelting process, the furnace body expands greatly, and the shape of the traditional furnace body with vertical side walls does not conform to its ex...

AI Technical Summary

Problems solved by technology

Since the temperature in the furnace body is very high during the smelting process, a large expansion of the furnace body occurs, and the shape of the traditional furnace body with vertical side walls does not conform to its expansion curve, so the overall expansion of the furnace body is uneven, unstable and Not synchronous, that is, the overall expansion performance is poor, so the furnace body is easily deformed under the action of expansion, such as cracking, which easily leads to reduced life of the furnace body, frequent maintenance, reduced efficiency, and increased costs

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