摘要
电煅烧无烟煤(ECA)好于燃气煅烧无烟煤(GCA),现在已被铝电解槽阴极炭块的寿命和高炉炉龄的实践所肯定。电煅烧炉已使用了许多年,然而,其高能耗和煅烧不均匀性是工艺本身存在的弱点,我们已开发了一项新生产技术,使无烟煤高温处理,其温度均匀性有明显改进。此新工艺,基于完整的掌握气—固相交换以及挥发物循环的新技术,有助于节约一笔可观的费用。即:电能从110kwh降低了50％;回收挥发物可使每吨电煅烧无烟煤节约相当于80kg燃料油。在质量和生产稳定性上的实际成果,将在炉技术中加以评述。
The superiority of electrically calcined anthracite (ECA) over gas caclined anthracite (GCA) for use in the production of carbon blocks is now definitively confirmed by the actual performances obtained in potlife in aluminium plants and campaign life of blast furnace. The electrical calciner has been used many years for this electrical calcination. However, high energy consumption and risk of calcination heterogeneity remained inherent weaknesses of the process. We have developed a new technology which performs the anthracite treatment at high temperature with a noteworthy improvement in temperature homogeneity. This new process, based on a perfect mastering of the gassolid exchanges and the volatile matter recycling technology, has also contributed to the achievement of attractive cost savings, eg. :a) the electric consumption is reduced by 50% from 1100kwh, b) the recovery of volatile matter results in an economy of 80kg of heavy oil per ton of calcined anthracite. Actual results in quality, and production performances, are presented along with a description of the furnace technology.
出处
《炭素技术》
CAS
CSCD
1989年第3期19-23,共5页
Carbon Techniques
