碳化硅衬套在氧压浸出锌冶炼生产中的应用

The application of silicon carbide bushing in the production of oxygen pressure leaching zinc smelting

氧压浸出是锌冶炼强化浸出工艺,氧压浸出工艺的锌浸出率和回收率是最高的。常规方法和高温高酸法沸腾焙烧硫化锌精矿生产工艺,冶炼过程中产生SO_2烟气,同时制酸过程产生的废水需处理。氧压浸出工艺输出元素硫,不释放SO_2烟气。由于富氧高压高温高酸的冶炼环境,氧压浸出高压对设备的要求较高。本文阐述浸出物料在减温减压过程中,经过预闪蒸器套管时,对该套管的腐蚀冲刷损伤,以及改进材质、结构等方面的生产实践。

Oxygen pressure leaching is the strengthening leaching process of zinc smelting, and the zinc leaching rate and recovery rate of the oxygen pressure leaching process are the highest. The conventional method and high temperature and high acid method should be used to roast the zinc sulfide concentrate, and the SO_2 flue gas is produced in the production process, and the acid wastewater should be treated. The oxygen pressure leaching process produces the elemental sulfur and does not release the SO_2 flue gas. Because of the oxygen rich high pressure high temperature high acid smelting environment, the oxygen pressure leaching high pressure on the equipment is higher. This paper describes the corrosion and scour damage of the casing during the process of reducing temperature and pressure, and through pre flashing casing, as well as the production practice of improving material and structure.