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自ABB的ALD550B型直流电弧炉于1991年7月在马来西亚南方钢铁公司成功地投产以来,目前已有20多座ABB直流电炉又相继投产,炉容为40～60t,变压器容量为25～110MVA.ABB直流电炉的关键部位——底电极与其他类型直流电炉不同,它采用的是导电耐火材料,对耐火材料的特殊要求是:①热导率应尽可能低;②电阻率应尽可能低(<4～5.1Ωm);③耐火材料寿命应长(>1000炉).为延长炉底耐火材料寿命,减少维修材料消耗,应采取以下措施:①连续操作,不使电炉冷下来;②留钢操作,促使温度均匀,扩大导电接触面积;③采用偏心底出钢,防止渣流出;④降低出钢温度.ABB直流电炉上安装有水冷炉壁、水冷炉盖、适于二次燃烧操作的氧一燃烧嘴、通过炉门吹氧的氧枪操纵器、用于泡沫渣操作的喷煤装置以及连续加入直接还原铁(海绵铁)和合金的添加系统.为减少加料次数,缩短停电时间,更好地利用热能,开发了高炉壳电炉.高炉壳电炉的水冷炉壁加
Since ABB’s ALD550B DC electric arc furnace was successfully put into operation at Southern Iron & Steel Malaysia in July 1991, more than 20 ABB DC electric furnaces have been put into operation successively. The furnace capacity is 40 ~ 60t and the transformer capacity is 25 ~ 110MVA. The key part of the ABB DC furnace - the bottom electrode is different from other types of DC electric furnace, it uses a conductive refractory material, the special requirements of the refractory material is: ① thermal conductivity should be as low as possible; ② resistivity should be as low as possible <4 ~ 5.1Ωm); ③ refractory life should be long (> 1000 furnaces) .In order to extend the life of refractories at the bottom of the furnace and reduce the consumption of maintenance materials, the following measures should be taken: ① continuous operation without electric furnace cooling down; Operation, to promote uniform temperature, to expand the conductive contact area; ③ the use of eccentric bottom of the steel to prevent slag outflow; ④ reduce the tapping temperature.ABB DC furnace with water-cooled furnace wall, water-cooled lid, suitable for secondary combustion oxygen A burner, an oxygen lance manipulator for blowing oxygen through the furnace door, a coal injection device for foaming slag operation, and an adding system for continuously adding direct reduced iron (sponge iron) and alloy. In order to reduce the number of charging, shorten the power outage time and more Use well Thermal energy, the development of blast furnace shell electric furnace blast furnace shell water-cooled furnace plus