探析湿法冶炼中耐酸砖的化学膨胀

Analysis of chemical expansion of acid-resistant bricks in hydrometallurgy

湿法冶炼项目中,耐酸砖作为性价比较高的防腐蚀材料被广泛用于高温、高压设备的衬里结构。本文以某工程所用的耐酸砖为实验材料,对时间、操作环境、材料成分及制造工艺等影响其化学膨胀的因素进行了分析,并对实际工况下与试验条件下的化学膨胀差异进行了分析,探讨化学膨胀对衬里系统稳定性、设备操作过程的影响。实际设计工作中,建议采用实验数据和有限元分析相结合进行辅助设计,以设计出可靠的耐酸砖衬里系统。

In hydrometallurgical projects,acid-resistant bricks are widely used in the lining structure of high temperature and high pressure equipment as a cost-effective anti-corrosion material. In this paper,acid-resistant bricks used in a project are used as experimental materials,and the factors that affect their chemical expansion such as time,operating environment,material composition and manufacturing process are analyzed,and the difference of chemical expansion between actual working conditions and experimental conditions is analyzed. These chemical expansions affect the stability of the lining system and the operation of the equipment. In actual design work,it is recommended to combine experimental data and finite element analysis as a auxiliary design to design a reliable acidresistant brick lining system.