Furnace body of electric furnace

Abstract

The invention discloses a furnace body of an electric furnace, comprising a furnace shell and fireproof material layers. The furnace shell is provided with a product discharge port and a slag discharge port; and the fireproof material layers are respectively arranged on the bottom wall and the inner peripheral side wall of the furnace shell, wherein the fireproof material layer on the bottom wall is an aluminum carbon brick layer, and the fireproof material layer at the lower part of the inner peripheral side wall is a graphite brick layer. According to the electric furnace, the service life of the furnace body can be prolonged in a high-temperature state, the corrosion resistance of the furnace body on the slag is improved, the maintenance expenses is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to an electric furnace body, in particular to an electric furnace body suitable for smelting oxide ore, having high corrosion resistance to slag and long service life. Background technique [0002] Electric furnaces are widely used in the field of metal smelting, such as ferronickel, special steel and other non-ferrous metals. For example, Chinese patent application CN101029794 discloses an electric arc furnace. The furnace inner wall of the electric furnace is usually laid with ordinary refractory materials, such as magnesia-chrome refractory brick layer. Since the temperature of the melt is as high as 1550°C during the smelting process, the temperature of smelted metals such as copper, nickel, and cobalt is about 1300°C, and the slag temperature in the furnace is about 1600°C. The refractoriness of the magnesia-chrome refractory brick layer It is 1700 ℃, so the temperature of its slag is very close, especially in the case of s...

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Problems solved by technology

Since the temperature of the melt is as high as 1550°C during the smelting process, the temperature of smelted metals such as copper, nickel, and cobalt is about 1300°C, and the slag temperature in the furnace is about 1600°C. The refractoriness of the magnesia-chrome refractory brick layer It is 1700 ℃, so the temperature of its slag is very close, especially in the case of smelting oxide ore, the furnace body is a reducing atmosphere, so the life of the refractory material is short and easy to damage, and the magnesia-chrome refractory brick layer is resistant The slag corrosion ability is weak, and the furnace needs to be shut down frequently to replace the refractory material, which reduces the work efficiency and increases the cost

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