Alumina Extraction from Red Mud by Magnetic Separation

被引：10

作者：

Suprapto ^{[1
]}

Istiqomah, Zahrotul ^{[1
]}

Santoso, Eko ^{[1
]}

Dawam, Ahmad Anwarud ^{[1
]}

Prasetyoko, Didik ^{[1
]}

机构：

[1] Inst Teknol Sepuluh Nopember, Dept Chem, Fac Sci, Sukolilo 60111, Surabaya, Indonesia

来源：

INDONESIAN JOURNAL OF CHEMISTRY | 2018年 / 18卷 / 02期

关键词：

red mud; magnetic separation; alumina;

D O I：

10.22146/ijc.25102

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alumina extraction from red mud has been investigated by magnetic separation with three-step treatment. First, the addition of red mud with Na2CO3 (12 wt%) and heated at 110 degrees C for 4 h. The second step was carbon reduction using coal with mass ratio of (red mud+Na2CO3) : coal was 1: 3 then roasted at temperature of 850, 950, and 1050 degrees C for 1, 2, and 3 h. The third step was magnetic separation. The magnetic separation was carried out in order to remove magnetite produced during roasting process. Magnetic and non-magnetic phases obtained were characterized by XRD and SEM-EDX techniques. The non-magnetic phase obtained was leached using HCl 6 M, and then aluminum content was determined by Inductively Coupled Plasma (ICP). The result revealed that the highest aluminum oxide extracted from the red mud was 20.66 wt% obtained by roasting at temperature of 1050 degrees C for 2 h.

引用

页码：331 / 336

页数：6

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