In this study, the fi nal concentrate from the wet magnetic separation was used to evaluate the effect of selective reduction based on the metal grade and recovery; all the diagrams in this paper ...

from refractory iron ores by reduction roasting followed by magnetic separation.9–11) This technology combines metal-lurgy and mineral processing, in which iron oxides are primarily reduced to metallic iron with grain growth. The reduced product is then ground to its liberation size fol-lowed by magnetic separation.12–14) In addition, it is ...

Recovery of iron from the waste slag is of great interest for maximum use of mineral resource, reduction of environment impact, and improvement of economical benefits to the related companies. Keywords: separation of iron, waste slag of pyrite processing, reduction-roasting, magnetic separation

R.M. Jiao et al., Recovery of iron from copper tailings via low-temperature direct reduction and … 975 the industrial scale requires further examination. Numer-ous laboratory-scale studies have focused on the reduction and magnetic separation of copper slags [22–24].

High iron bauxite ore is a typical unmanageable polyparagenetic resource and owns high comprehensive utilization value. Separation of iron from fine particles of high iron bauxite ore by the process of metallized reduction and magnetic dressing was researched systemically. The effect of magnetic field intensity, reduction temperature, reduction time, mole ratio of fixed carbon to reducible ...

However, when carbothermal reduction was applied prior to magnetic separation, recovery of iron in the magnetic tailing was reduced to around 9%, and more than 90% of Ti and Al and around 80% of REEs remained in the tailing. This result shows how effective carbothermal reduction can be on the efficiency of the magnetic separation process.

Furthermore, on such optimum conditions of deep reduction as reduction temperature 1275°C, time 50min, and coal content 40%, the reduction products were separated in the flowsheets of magnetic separation after fine grinding and the iron powder products with iron grade 79.58% and recovery 62.77% were obtained.

its complex characteristic. The recovery of the iron is only about 50% when the high intensity magnetic separator was employed. Direct reduction roasting-magnetic separation is one of the effective ways to recover iron from the refractory iron ore. In this paper, the process of direct reduction roastingmagnetic separation was employed to -

High iron bauxite ore is a typical unmanageable polyparagenetic resource and owns high comprehensive utilization value. Separation of iron from fine particles of high iron bauxite ore by the process of metallized reduction and magnetic dressing was researched systemically. The effect of magnetic field intensity, reduction temperature, reduction time, mole ratio of fixed carbon to …

involves the separation of iron minerals from low-grade iron ores. There are three basic methods for separation of iron minerals i.e., magnetic separation, froth flotation and gravity concentration [4]. The iron concentrate produced by any processing method is used for producing iron metal either by blast furnace or direct reduction methods [5].

To explore new ways to recycle red mud, this paper study on iron recovery by microwave carbon heat reduction-magnetic separation from red mud. Using orthogonal experimental method,study the effect of carbon to oxygen ratio, microwave power, heating time and slag former ratio on recovery of iron. The results show that microwave

magnetizing reduction andmagnetic separation. Magne-tizing reduction followed by magnetic separation is a compoundtechnique for beneficiation of iron ores. Optimization of each of the reduction and separation process will haveaconsiderable effect on improving the efficiency of this beneficiation technique. Theaim of the present work is to ...

iron-rich component was collected by magnetic separation. The effects of sample particle size and various other reduction parameters on the efficiency of magnetic separation were studied. Under the optimum experimental conditions, the manganese content in the ore increased from around 36% to more than 45%, and almost 50% of iron were removed at a

A technique with coal-based direct reduction followed by magnetic separation is presented in this study for recovering and reusing iron otherwise wasted in vanadium tailings. Process parameters such as usage of additives, tailings/reductant/additives ratio, reduction temperature and time, as well as particle size were experimentally determined.

Reduction of Iron Content from Silica Sand by Scrubbing Process ... The combined process of scrubbing and magnetic separation ... (Mowla, et al. 2007). But in this study conventional method to ...