中国有色冶金

Copper matte, also known as matte, mainly composed of Cu2S and FeS, can trap gold, palladium, platinum and other precious metals in refined ore, of which the determination of gold, palladium, platinum and so on is of great significance, the current industry standard lacks the determination method of palladium and platinum in copper matte. In this paper, based on the composition analysis of copper matte samples, the enrichment parameters of copper matte samples were optimized for high copper content and high sulfur content (copper matte sample weighing 10g, anhydrous sodium carbonate content 20g, slag silicate content 0.75, lead oxide content 200g, potassium nitrate content 10g). By adding 30mg pure silver as a protective agent, the loss of gold, palladium, platinum and other precious metals in copper matte can be effectively avoided. Anhydrous sodium sulfate is innovatively used as a covering agent, and the content of gold, palladium and platinum in noble metal composite solution is simultaneously determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The results showed that the relative standard deviations (RSD, n=11) of gold, palladium and platinum were 0.46%~3.66%, 0.68%~4.68% and 3.19%~4.87%, respectively. The recoveries of metal were 97.9%~105.6%. The method established in this research has high accuracy and operability without obvious matrix effect and spectral line interference, and can meet the quality control requirements of gold, palladium and platinum in copper matte production and the daily analysis and testing requirements of third-party testing institutions.