(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 針對傳統(tǒng)硫酸化焙燒紅土鎳礦能耗高、設(shè)備腐蝕大等缺點，提出硫酸氫銨焙燒循環(huán)工藝。以菲律賓紅土鎳礦為原料，對焙燒劑添加量、焙燒溫度和焙燒時間等工藝參數(shù)及焙燒機(jī)理進(jìn)行研究。結(jié)果表明：焙燒溫度300 ℃、焙燒時間90 min的條件下，Ni、Co、Mn、Mg、Fe的提取率分別為95%、96%、92%、57%、79%，硫酸氫銨具有良好的硫酸化能力。該工藝具有效率高、能耗低、環(huán)境友好等特點，對低品位紅土鎳礦的開發(fā)利用具有重要 意義。
關(guān)鍵字: 紅土鎳礦；硫酸氫銨；硫酸化焙燒；循環(huán)機(jī)理
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The circular technology of sulfation roasting nickel laterite ore using ammonium bisulfate was supposed to overcome the defect of traditional process, such as high power consumption and equipment corrosion. Using Philippines nickel laterite ore as raw material, the roasting mechanism and various parameters including ammonium bisulfate addition, roasting temperature and roasting time were investigated. The results show that, under conditions of 300 ℃ and 90 min, the extraction rate of Ni, Co, Mn, Mg and Fe are about 95%, 96%, 92%, 57% and 79%, the sulfating ability of ammonium bisulfate is strong. The process is proved to be significant in exploitation and utilization of low-grade nickel laterite ores, which has some advantages, such as high efficiency, low power consumption and good environment.
Key words: nickel laterite ore; ammonium bisulfate; sulfation roasting; circular mechanism
