基于SO_(3)浓度控制的火法炼铜技术研究

Research on pyrometallurgical copper smelting technology based on SO_(3) concentration control

针对火法炼铜过程中产生大量的SO_(3),对设备造成严重腐蚀,影响最终产品质量问题,提出一种利用耗氧剂闪锌矿和方铅矿进行SO_(3)浓度控制的火法炼铜技术。在充分分析影响SO_(3)生成温度和组分的基础上,通过向锅炉烟道喷吹耗氧剂闪锌矿和方铅矿降低氧气浓度,以达到控制烟气中SO_(3)浓度的目的。试验结果显示,与原来0.5%SO_(3)浓度相比,加入耗氧剂闪锌矿与方铅矿后,试验中SO_(3)浓度整体未超出0.01%,铜品位为99.9%~100.0%,而未加任何耗氧剂所得铜品位为99.4%~99.6%。该方法对火法炼铜产品质量控制具有积极意义。

To address the issues of significant SO_(3) generation during pyrometallurgical copper smelting,which causes severe equipment corrosion and affects the quality of the final product,a method utilizing sphalerite and galena for SO_(3) concentration control in pyrometallurgical copper smelting is proposed.Based on a thorough analysis of the tempera-ture and components affecting SO_(3) formation,this method primarily involves spraying and blowing sphalerite and galena into the boiler flue to reduce oxygen concentration,thereby controlling SO_(3) levels in the flue gas.Experimental results indicate that,compared to the original SO_(3) concentration of 0.5%,the addition of sphalerite and galena reduced the overall SO_(3) concentration to below 0.01%in the tests.The copper grade ranged between 99.9%and 100%,whereas copper grades obtained without any oxygen-consuming agents ranged from 99.4%to 99.6%.Therefore,this method has significant positive implications for controlling the quality of pyrometallurgical copper smelting products.