Electric heating furnace

Abstract

The invention relates to an electric heating furnace, which is characterized in that the furnace wall is sequentially provided with an insulating and heat-insulating layer, a heat-insulating fiber layer, a heat-insulating ash layer and a metal furnace plate from the inside to the outside; Multiple sets of metal heating bands are fixed on the insulation layer, and the metal heating bands are fixed to the insulation and heat insulation layer through several inner heat nails; the two ends of the metal heating bands are respectively fixed to one end of the positive and negative lead-out rods Connection, the other end of the positive and negative lead-out rods passes through the insulation and heat insulation layer, heat-insulation fiber layer, heat-insulation ash layer and metal furnace plate and is placed outside the furnace wall, and the junction of the positive and negative lead-out rods and the metal furnace plate is set. With insulating sheath. The invention has the beneficial effects of saving energy, improving the utilization rate of heat energy, reducing the production cost of steel rolling, reducing the power consumption of steel rolling to 250-260kWh / ton, and the processing cost is close to that of a heating furnace using coal as fuel, and it is environmentally friendly and pollution-free , Strong economic applicability.

Description

technical field [0001] The invention relates to a heating device, more specifically to an electric heating furnace for heat treatment of steel, which is mainly used in the field of steel rolling production. Background technique [0002] The fuel of the traditional steel rolling heating furnace is mainly divided into three types: coal, natural gas and electricity. When used in the steel rolling production process, the cost ratio is 1:3:4 respectively. Due to the large drop in the current coal price, the actual cost ratio Therefore, the heating furnace using coal as fuel is still the preferred choice of most domestic iron and steel enterprises. [0003] At present, most domestic steel mills use coal heating furnaces in the steel rolling production process. The heat generated by the combustion of coal raises the temperature in the furnace to about 1200°C to heat the billets, which can greatly reduce the deformation of the billets. resistance, thus facilitating the rolling oper...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of low thermal energy utilization rate, large resource consumption and serious environmental pollution of the existing coal heating furnace, the present invention provides an electric heating furnace, which can effectively improve the thermal energy utilization rate and improve the production of rolled steel. benefit, reduce waste gas and reduce pollution

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