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将铜渣分别于850,900,950,1 000,1 050℃进行了煅烧,探讨铜渣在不同温度和不同煅烧时间下的晶体变化,为铜渣的综合利用提供可靠的基础数据.采用XRD法和SEM/EDX法表征了铜渣在不同煅烧温度和不同煅烧时间下的晶相结构和显微结构.实验结果表明:随着煅烧温度的提高和煅烧时间的延长,铜渣中组分晶相发生如下转变过程:2FeO.S iO2+0.5O2→α-Fe2O3+S iO2和Fe3O4→γFe2O3→αFe2O3.氧化煅烧处理可以实现铜渣中主要晶相铁橄榄石离解,氧化铁的富集和析出.
The copper slag was calcined at 850, 900, 950, 1 000 and 1 050 ℃, respectively, to investigate the crystal change of copper slag at different temperatures and different calcination time, and provide reliable basic data for the comprehensive utilization of copper slag.Using XRD and SEM / EDX method was used to characterize the crystal structure and microstructure of the copper slag at different calcination temperature and different calcination time.Experimental results show that the crystalline phase of the copper slag changes as the calcination temperature increases and the calcination time prolongs Process: 2FeO.SiO2 + 0.5O2 → α-Fe2O3 + SiO2 and Fe3O4 → γFe2O3 → αFe2O3. The calcination treatment can achieve the dissolution of the main crystalline fayalite and the enrichment and precipitation of iron oxide in the copper slag.