Mechanized guniting of the lining of steelcasting ladles

Conclusions A method has been developed and equipment constructed for guniting steelcasting ladles without any manual labor. Experiments and tests were carried out with compositions based on quartzite, Chasov-Yar semiloamy sand, and fine-ground chamotte. The industrial-scale guniting tests showed that the durability of the lining of 130-ton steelcasting ladles increases by 30% (4.7 melts) on average with one guniting per ladle campaign.Translated from Ogneupory, No. 5, pp. 32–36, May, 1977.     

Gas-flame guniting of the lining of intermediate continuous steel-casting ladles

Conclusions As a result of laboratory investigations and rig testing of the flame guniting of intermediate ladles for continuous steel-casting plant we recommend the following bodies: 90% corundum, 10% sodium tripolyphosphate; 80–90% corundum, 20–10% chamotte; 80–90% high-alumina chamotte, 20–10% chamotte. The particle size of the corundum body is <0.088 mm, high-alumina <0.25 mm.The optimum guniting cycle is: consumption of natural gas 60 m³/h, oxygen 100 m³/h, gunite body 150–200 kg/h, guniting distance 450–550 mm, rate of moving the burner 1.0 m/min.In the case of chamotte, the coefficient of gunite body utilization equals 0.75, for high-alumina 0.70, and for corundum 0.40, with an open porosity in the gunite coating of 10–15, 8–10,and 4–6%, respectively.Using the experimental equipment the body made from 90% corundum and 10% sodium tripolyphosphate was used to gunite the side surface of the lining of an intermediate ladle. The wear of the gunite section of the lining was 1.3–2.5 mm per heat.Translated from Ogneupory, No. 4, pp. 37–42, April, 1973.     

太钢AOD炉衬长寿技术

AOD炉衬寿命是一个综合性的指标,它不仅与炉型结构设计、耐火材料的选择和使用工艺有关,而且与冶炼工艺水平、各操作参数的控制、设备状况等密切相关。本文结合太钢AOD炉的操作特点及损毁特征,介绍了太钢围绕以上几方面在提高AOD炉衬寿命上所取得的显著效果。     

Taking into consideration the polydispersion of guniting powder in calculation of a guniting flame

Conclusions The principle of division of polydispersed fuel into monodispersed fractions taking into consideration the determining property of the fuel particles is presented.By calculation of three- and four-fraction guniting flames it was established that the polydispersed guniting powder must be divided into not less than four fractions.Translated from Ogneupory, No. 7, pp. 41–44, July, 1986.     

提高连铸钢包内衬寿命的措施

本文分析了攀钢钢包内衬损毁的原因。从提高耐火材料性能和使用技术两方面采取了改进措施,使钢包一次性平均使用寿命从72次提高到90次,最高达115次,取得了显著的经济效益。     

基于拉伸混合机理设计的混合器

提高螺杆类成形加工设备混合能力的一个有效方法就是设计混合元件。介绍了螺棱间隙值的设计计算方法及CRD螺杆基于拉伸混合的特殊混合原理,CRD螺杆应用于单螺杆挤出机,以及在CRD螺杆基础上发展的CRD止逆阀和破碎盘混合器。