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日本钢管公司京浜厂电炉炼钢车间设有50 t电弧炉、VOD和VAD装置,用来生产无缝管用和厚板用的不锈钢和高合金钢,月产量4000～5000 t。过去为了使炉内钢水温度和成分均匀化,在电炉炉底装设了电磁搅拌器(容量为400 kVA),但这种搅拌器的搅拌力不高,往往使电炉中有残存废钢、铬还原不良、电弧传热不均匀、炉渣渣化不良以及由此引起的各种操作上的问题。为解决这些问题,在电炉车间引进了电炉底吹搅拌技术,即在电炉底部配置3个底吹风口,搅拌气体使用氩或氮。各风口可独立进行气体流量的控制,每个风口的最大气体流量为300 L/min。风口型式为埋藏多根不锈钢细管(内径1 mm)的多孔透气塞,材质为镁碳质耐火材料。该种风口取代了过去装设在电弧炉上的电磁搅拌器。
Japanese steel pipe company Jingbang electric furnace steelmaking plant with 50 t electric arc furnace, VOD and VAD devices for the production of seamless and thick plate with stainless steel and high alloy steel, monthly production of 4000 ~ 5000 t. In the past, in order to homogenize the temperature and composition of the molten steel in the furnace, a magnetic stirrer (capacity: 400 kVA) was installed at the bottom of the electric furnace. However, the stirring power of this stirrer was not high, often resulting in residual scrap and chromium reduction in the electric furnace Bad, uneven arc heat transfer, bad slag slag and the various operational problems caused by it. In order to solve these problems, electric furnace bottom blowing mixing technology was introduced in the electric furnace workshop, that is, 3 bottom blowing tuyeres were arranged at the bottom of the electric furnace, and the stirring gas used argon or nitrogen. Each tuyere can independently control the gas flow, the maximum gas flow per tuyere is 300 L / min. The tuyere type is a porous breathable plug buried with a plurality of stainless steel thin tubes (inner diameter 1 mm), and is made of magnesium carbonaceous refractories. This tuyere replaced the electromagnetic stirrer previously installed on the electric arc furnace.