基于PbO/PbS特征发射光谱的铜冶炼过程检测方法研究

摘要

介绍了在铜冶炼时运用转炉火焰中氧化铅(PbO)和硫化铅(PbS)特征发射光谱强度比值进行过程检测(区分制矿渣阶段和制铜阶段)的一种方法.根据已知气体分子的特征发射光谱,确定了实测谱线中PbO和PbS的存在,并通过现场实验确定了制矿渣阶段的主要特征发射光谱来自PbS,而制铜阶段的主要特征发射光谱来自PbO.转炉冶炼时,PbO和PbS特征发射光谱强度的相对变化提供了铜冶炼过程的检测方法,通过利用特征发射光谱相对强度的比值可以区分炼铜过程中的两个不同阶段——制矿渣阶段(S期)与制铜阶段(B期).在一个完整的炼铜周期中,利用光谱测量设备采集转炉火焰发射光谱,将噪声滤除后的PbO和PbS特征发射光谱用于过程检测,准确地完成了S期与B期的鉴别.理论和实验都证明基于发射光谱的铜冶炼过程检测方法是可靠的.%A method of copper converting process determination based on PbO/PbS emission spectrum analysis was described. According to the known emission spectrum of gas molecules, the existence of PbO and PbS was confirmed in the measured spectrum. Through the field experiment it was determined that the main emission spectrum of the slag stage was from PbS, and the main emission spectrum of the copper stage was from PbO. The relative changes in PbO/PbS emission spectrum provide the rnmethod of copper converting process determinatioa Through using the relative intensity in PbO/PbS emission spectrum the copper smelting process can be divided into two different stages, i. e. the slag stage (S phase) and the copper stage (B phase). In a complete copper smelting cycle, a receiving telescope of appropriate view angle aiming at the converter flame, after noise filtering on the PbO/PbS emission spectrum, the process determination agrees with the actual productioa Both the theory and experiment prove that the method of copper converting process determination based on emission spectrum analysis is feasible.