(1. 南華大學(xué) 核資源工程學(xué)院，衡陽 421001；
2. 南華大學(xué) 鈾礦冶生物技術(shù)國防重點(diǎn)學(xué)科實(shí)驗(yàn)室，衡陽 421001)
摘 要: 對(duì)難浸含金硫精礦進(jìn)行微波焙燒，考察微波功率、礦量(即樣品質(zhì)量)和焙燒時(shí)間對(duì)樣品質(zhì)量損失率和浸出率的影響。結(jié)果表明：當(dāng)微波功率為16 kW、焙燒時(shí)間為50 min、礦量為900 g時(shí)，樣品質(zhì)量損失率可達(dá)28.12%，浸出率可達(dá)71.56%，較原礦直接碘化浸出率(9.82%)有了大幅提高。利用XRD和SEM技術(shù)分析焙燒前后樣品的成分和表面形貌，微波焙燒后的樣品較原礦更為松散、多孔，更利于浸出。
關(guān)鍵字: 含金硫精礦；金；微波焙燒；預(yù)處理；浸出率；表面形貌
（1. School of Nuclear Resource Engineering, University of South China, Hengyang 421001, China;
2. Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy,
University of South China, Hengyang 421001, China）
Abstract:After roasting refractory gold-bearing sulfur concentrates by microwave, the influences of microwave power, the ore mass and roasting time on sample mass loss rate and leaching rate were investigated. The results show that sample mass loosing rate is 28.12% and iodide leaching rate is 71.56% after 900 g raw ore is roasted for 50 min at power of 16 kW, and the leaching rate after microwave pretreatment increases greatly than that of raw ore rate (9.82%). With the XRD and SEM technology analyzing mineral composition and surface morphology, roasted sample is more beneficial to leaching than raw ore because of ore inside becoming loose and generating plenty of pores.
Key words: gold-bearing sulfur concentrate; gold; microwave roasting; pretreatment; leaching rate; surface morphology
