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首页> 外文会议>TMS annual meeting exhibition;Symposium on light metal >Recovery of Iron-, Titanium-Bearing Constituents from Bauxite Ore Residue via Magnetic Separation Followed by Sulfuric Acid Leaching
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Recovery of Iron-, Titanium-Bearing Constituents from Bauxite Ore Residue via Magnetic Separation Followed by Sulfuric Acid Leaching

机译：通过磁选和硫酸浸出从铝土矿残渣中回收含铁，钛的成分

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摘要

Bauxite ore residue is a hazardous byproduct derived from alumina production, containing iron, titanium, aluminum and other valuable metals. The feasibility of an integrated technological route for recovering titanium from bauxite ore residue was verified in this study. Titanium-bearing iron concentrate was first recycled through magnetic separation process, and titanium was further leached from the non-magnetic material derived from the upper-stream process by using sulfuric acid. The effects of magnetic intensity on the recovery of iron, and the effects of H_2SO_4 concentration, leaching temperature, leaching time and liquid to solid ratio on the leaching of titanium have been investigated. The results showed a magnetic concentrate with total iron grade of 56.39% and TiO_2 content of 8.66% was obtained under a two-stage magnetic separation process (intensity: 0.8 and 0.2 T, respectively), and magnetic recoveries of iron and titanium attained 55.79 and, 17.37% respectively. 96.36% TiO_2 was subsequently leached from the non-magnetic material under the optimal conditions of sulfuric acid concentration of 8 mol/L, leaching temperature of 70 ℃, leaching time of 120 min, and liquid to solid ratio of 8.
机译：铝土矿残渣是氧化铝生产中产生的有害副产品，含有铁，钛，铝和其他贵重金属。这项研究证实了从铝土矿残渣中回收钛的综合技术路线的可行性。首先通过磁选工艺回收含钛铁精矿，然后使用硫酸将钛从上游工艺衍生的非磁性材料中进一步浸出。研究了磁强度对铁的回收率的影响，以及H_2SO_4浓度，浸出温度，浸出时间和液固比对钛浸出的影响。结果表明，在两步磁选过程中（强度分别为0.8 T和0.2 T），获得了总铁品位为56.39％，TiO_2含量为8.66％的磁精矿，铁和钛的磁回收率分别达到55.79和0.20。 ，分别为17.37％。随后在硫酸浓度为8 mol / L，浸出温度为70℃，浸出时间为120分钟，液固比为8的最佳条件下，从非磁性材料中浸出96.36％TiO_2。

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