摘要
In aluminum electrolytic process, the variables affect the current efficiency and the stability of electrolysis cells. AIF3 addition and aluminum tapping volume are two important factors that affect economic benefits of aluminum electrolytic production. Fuzzy logic provides a suitable mechanism to describe the relationship between the process variables and the current efficiency. Fuzzy expert system based on Mamdani fuzzy inference process for aluminum electrolysis was adopted to adjust A1F3 addition and aluminum tapping volume. A novel variable universe approach was applied in the system to solve the problem that different electrolysis cells have different universes of variables. The system was applied to 300 kA aluminum electrolysis cells in a aluminum plant. Experimental results showed that the electrolyte temperature was kept stably between 945 and 955℃, the current efficiency reached 93.5%, and the DC power consumption was 13 000 kW.h per ton aluminum.
在铝电解过程中有很多参数影响电流效率和电解槽的稳定性。AlF3添加量和出铝量是2个影响铝电解生产经济效益的重要因素。模糊逻辑提供一种合适的机制来描述铝电解过程参数与电流效率之间的关系。在铝电解过程中,采用基于Mamdani模糊推理过程的模糊专家系统调整AlF3添加量和出铝量。系统应用一种新的变论域方法,解决不同电解槽具有不同参数论域的问题,并将系统应用于某电解厂的300kA铝电解槽中。实验结果表明,电解质温度稳定在945℃～955℃,电流效率达到93.5%,吨铝直流电耗为13000kW·h。
基金
Project (2009BAE85B00) supported by the National Key Technology R&D Program of China
Project (PHR20100509) supported by Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality, China
作者简介
Corresponding author： CAO Dan-yang; Tel： ＋86-10-88803022-22; E-mail： ufocdy@163.com
