DSP精矿烧结浸出法回收铝和钠1

IF 0.9 Q3 MINING & MINERAL PROCESSING
H. Hodge, P. Hayes, W. Hawker, J. Vaughan
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引用次数: 1

摘要

拜耳烧结-浸出联合工艺已被证明是一种技术上可行的铝土矿残渣再处理方法,以回收损失的烧碱和氧化铝。然而,这种方法存在与处理大量铝土矿残渣(其中大部分是脉石)相关的高能量要求和试剂消耗。为了解决这个问题,研究了从新型Sandy脱硅产品工艺中提取的脱硅产品(DSP)浓缩物的处理。在本研究中,研究了烧结阶段的关键工艺参数,包括DSP精矿的品位和粒度、石灰石的添加速率、使用草酸钙代替石灰石和还原烧结。使用定量XRD指定DSP精矿烧结矿相,并评估烧结产物的可浸出性。发现在烧结过程中使硅酸盐反应程度最大化对于确保高可浸出性是重要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The DSP concentrate sinter-leach process for aluminium and sodium recovery 1
ABSTRACT The combination Bayer sinter-leach process has been shown to be a technically viable method for reprocessing bauxite residue to recover lost caustic and alumina. However, this method suffers from high energy requirements and reagent consumption associated with processing the large volume of bauxite residue, the majority of which is gangue. To address this issue, processing a desilication product (DSP) concentrate derived from the novel Sandy Desilication Product process is studied. In the present study, critical processing parameters surrounding the sintering stage were investigated including the grade and particle size of the DSP concentrate, the limestone addition rate, using calcium oxalate as an alternative to limestone and reductive sintering. The DSP concentrate sinter mineral phases were specified using quantitative XRD and the sinter products were assessed for leachability. Maximising the silicate reaction extent during sintering was found to be important to ensure high leachability.
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来源期刊
CiteScore
3.50
自引率
0.00%
发文量
6
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