Peripheral roof generally used to burn high alumina brick or do not burn high alumina brick, magnesia brick and magnesia chrome brick.0 ycm3 above, with a particularly good anti-erosion and good use of the results. In recent years, there are not burning high-alumina bricks, high-alumina castable prefabricated parts, the life of some reached more than 150 furnaces; while saving energy and construction is simple, metallurgy spare parts to reduce labor intensity. Different types of DC arc furnaces are classified according to the structure of the bottom ladle refractoryelectrode, which shows the importance of the bottom electrode.. The GHH is the bottom of which many small steel pins (20-50 mm diameter steel rods) are buried.
It is impossible to raise the life of the bottom electrode significantly by improving the performance of the refractory. From the tilting to the fixed tapping tapping, tapping brick brick for the asphalt baked sintered magnesium bricks, metallurgical spare parts for the magnesium brick brick tube, the end of the Al203-SiC-C brick or magnesium bricks. In order to improve the life, now useful in Japan MgO-C material. The bottom electrode of the ABB type DC electric arc furnace is electrically conductive with a conductive refractory and the bottom surface is air-cooled.Small electric arc furnace top is generally used to burn high alumina bricks, its service life is generally within the range of 60 ~ 120 furnace.High-power, ultra-high-power electric arc furnace top electrode triangle corundum, metallurgical spare parts chrome corundum and corundum magnesia castables and precast.
DC arc furnace bottom electrode life, in essence, the life of refractories. to the furnace, the power, the electrode and the scrap between the arc and heating charge, metallurgy spare parts for a series of metallurgical refractory brick for salechemical reactions, the scrap steel into steel. On the basis of these three types, the development of the steel-type, water-cooled cooling bottom electrode rods and steel rod and copper rod composite bottom electrode type and other forms.
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