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iron red mud magnetic separation pyrite

Iron Recovery from Red Mud by Reduction Roasting-Magnetic ...

This work provided an effective method for comprehensive utilization of red mud, which mainly focused on the first step of recovering iron from a high iron content red mud by reduction roasting-magnetic separation. During the reduction, iron oxides were reduced to metallic iron with the aid of sodium sulfate and sodium carbonate.

EXTRACTION - Red Mud

method to produce magnetite by anaerobically coroasting pyrite FeS. 2 with red-mud.The elemental sulfur produced helped in this reduction. A wet magnetic separation method was employed to separate magnetite but the grade of the separated magnetite was not mentioned by the authors 41 .

Alumina Extraction from Red Mud by Magnetic Separation ...

Alumina extraction from red mud has been investigated by magnetic separation with three-step treatment. First, the addition of red mud with Na 2 CO 3 12 wt% and heated at 110 C for 4 h. The second step was carbon reduction using coal with mass ratio of red mud Na 2 CO 3 : coal was 1:3 then roasted at temperature of 850, 950, and 1050 C ...

Recycling of iron from red mud by magnetic separation after ...

The reduction roasting-magnetic separation is widely used for iron recovery from red mud using coal 16 , sodium carbonate 14 and pyrite 17 as reducing agent at 600-1300 C and the iron ...

Recycling of iron from red mud by magnetic separation after ...

The iron content in red mud decreases by magnetic separation after roasting. The released SO 2 gas during roasting could easily join the process of sulfuric acid production. This method is expected to be applied in industry for removal of iron from red mud only if the amount of the pyrite is calculated based on the content of Fe 2 O 3 in red mud.

PDF Recovery of iron from red mud by high-temperature ...

The high-temperature reduction of red mud in the absence and presence of sodium borate was carried out to facilitate the subsequent recovery of iron by wet magnetic separation.

Recycling of iron from red mud by magnetic separation after ...

A recycling process of iron from red mud by magnetic separation is proposed, in which iron oxide Fe 2 O 3 in red mud transforms to magnetite Fe 3 O 4 by anaerobic co-roasting with pyrite FeS 2 . TG-DTA and XRD results showed that hematite was reduced to magnetite by the thermo-decomposed compounds iron monosulfide, pyrrhotite and element ...

v117n4a7 Recovery of iron from red mud by high- temperature ...

Red mud is the waste generated during the production of alumina from bauxite. The high-temperature reduction of red mud in the absence and presence of sodium borate was carried out to facilitate the subsequent recovery of iron by wet magnetic separation. Sodium borate was found to

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