摘要
钢包下水口是钢包中钢水向中间包流动的通道,并与大包长水口连接,有保护浇铸,防止钢水二次氧化的作用。钢包下水口在使用过程中的横断、穿孔、夹钢、粘钢等问题。为了降低钢包运转过程中下水口冷裂纹出现的概率,降低钢包下水口的生产成本,以高铝料、莫来石、熔融石英、酚醛树脂等为原料,研究了钢包下水口引入莫来石和熔融石英对其性能的影响。在钢包下水口中引入莫来石和熔融石英实验表明:(1)引入莫来石和熔融石英对钢包下水口的常温抗折强度、耐压强度影响不大;(2)引入莫来石和熔融石英后的钢包下水口1000℃×3 h烧后的抗折耐压强度明显降低;(3)引入莫来石和熔融石英后,常温和1000℃×3 h烧后的体积密度减小,气孔率增大。通过在不同钢厂130 t和180 t钢包上正常使用后,降低了钢包下水口冷裂纹产生的概率,平均扩孔4~4.5 mm,满足钢厂试用要求。
The lower water outlet of the ladle is a channel for the flow of molten steel from the ladle to the intermediate ladle,and is connected to the long water outlet of the large ladle.It has the function of protecting casting and preventing secondary oxidation of molten steel.The problems of transverse cutting,perforation,steel clamping,and sticking during the use of the ladle outlet.In order to reduce the probability of cold cracks at the downcomer during ladle operation and reduce the production cost of the ladle downcomer,the effect of mullite and fused silica introduced into the ladle downcomer on its performance was studied with high alumina,mullite,fused silica and phenolic resin as the materials.The experiments of mullite and fused silica introduced into the ladle nozzle show that:the introduction of mullite and fused silica has little②After the introduction of mullite and fused silica,the bending and compressive strength of the ladle nozzle after 1000℃×3 h sintering is significantly reduced;③After the introduction of mullite and fused silica,the bulk density decreases and the porosity increases at room temperature and after firing at 1000℃×3 h.After normal use on 130t and 180t steel ladles in different steel mills,the probability of cold cracks occurring at the lower water outlet of the ladle has been reduced,with an average hole expansion of 4~4.5mm,meeting the trial requirements of steel mills.
作者
王文寰
甘广永
宋利宽
郝立可
王蕊
WANG Wenhuan;GAN Guangyong;SONG Likuan;HAO Like;WANG Rui(Hebei Guoliang New Materials Co.Ltd.,Hebei Enterprise Technology Center,Hebei Refractory Technology Innovation Center For Iron and Steel Smelting,Tangshan 063021,China)
出处
《工业加热》
CAS
2024年第1期6-8,共3页
Industrial Heating
基金
唐山市新型高温材料创新联合体能力提升项目(22150239J)
河北省科技领军企业能力提升项目(22140207J)。
