Modeling assessment of recovering iron from red mud by direct reduction: magnetic separation based on response surface methodology

2018 ◽  
Vol 25 (5) ◽  
pp. 497-505 ◽  
Author(s):  
Ran Wang ◽  
Zheng-gen Liu ◽  
Man-sheng Chu ◽  
Hong-tao Wang ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Magnetic Separation ◽  
Red Mud ◽  
Direct Reduction

Optimization of combined microwave pretreatment–magnetic separation parameters of ilmenite using response surface methodology

2012 ◽  
Vol 232 ◽  
pp. 58-63 ◽  
Author(s):  
Guo Chen ◽  
Jin Chen ◽  
Jun Li ◽  
Shenghui Guo ◽  
C. Srinivasakannan ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Magnetic Separation ◽  
Microwave Pretreatment ◽  
Separation Parameters

Study on Recovering Iron from Shandong Red Mud Based on Gas Reduction Reaction

2015 ◽  
Vol 1092-1093 ◽  
pp. 1041-1045
Author(s):  
Xing Wu Hou ◽  
Yu Min Wu ◽  
Ding Guo Huang ◽  
Yan Yang Gao ◽  
Jian Guo Liao ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Red Mud ◽  
Direct Reduction ◽  
Reduction Reaction ◽  
Raw Material ◽  
Magnetic Separations ◽  
Bayer Red Mud ◽  
Roasting Temperature ◽  
Reduction Effect ◽  
Basic Characteristics

Based on Shandong Renping Bayer red mud as the raw material, analyzing its basic characteristics, the result is that the content of total iron in red mud is 29.55%. Gas-based high-temperature direct reduction experiments are made by using a gas mixture of CO and H2O as a reducing agent. And then the reduction effect was investigated by magnetic separation experiments, to realize that separation of iron minerals from red mud. The results show that the consequent of the magnetic separation is improved obviously with the temperature rising. Under these conditions, namely, the roasting temperature being 1050°C, the roasting time lasting 90 minutes, the reduction gas rate being 0.7 m3/min, the magnetic field being 2.2A, and three magnetic separations, the iron recovery ratio in red mud is over 97%.

scholarly journals Optimization and Modelling of Turbidity Removal of Sewage using High-Gradient Magnetic Separation (HGMS) by Response Surface Methodology (RSM)

2020 ◽  
Vol 28 (4) ◽  
Author(s):  
Nur Sumaiyyah Supian ◽  
Johan Sohaili ◽  
Nur Farhan Zon
Keyword(s):  
Stainless Steel ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Magnetic Separation ◽  
Suspended Matter ◽  
Circulation Time ◽  
Small Range ◽  
Steel Wool ◽  
Turbidity Removal ◽  
Suggested Approach

Endless industrial development and growing society occasionally create an enormous volume of wastewater, which leads to some issues on wastewater treatment. Existing conventional screening processes have various limitations and drawbacks. Therefore, this study investigated the use of a combination of non-corrosive stainless steel wool and a permanent magnet to increase magnetic gradient, hence reducing suspended matter in sewage through turbidity test. An approach for optimizing the reduction of suspended matter through turbidity analysis was conducted using central composite design (CCD) under response surface methodology (RSM). Three critical independent variables, such as magnet strength, circulation time, and steel wool, and turbidity removal as the response, were further studied to analyze their interaction effects. As a result, an optimal value of turbidity removal was found at 90.3% under the specified optimum conditions of magnet strength of 245 mT, 116 g of non-corrosive stainless steel wool, and 16 h of circulation time. Statistical analysis had shown that the magnet strength, circulation time, and steel wool significantly affected the turbidity removal performance. Furthermore, design of experiment was significantly verified by a small range of error between predicted and actual data. Consequently, a higher gradient of magnetic separation was proven to effectively remove suspended matter using inexpensive non-corrosive stainless steel wool without using magnetic adsorbent. Thus, the suggested approach was found to be cost-effective and environmentally friendly for sewage treatment.

Sequestration of CO2 by red mud with flue gas using response surface methodology

2021 ◽  
pp. 1-13
Author(s):  
T.D Rushendra Revathy ◽  
A. Ramachandran ◽  
K. Palanivelu
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Flue Gas ◽  
Red Mud ◽  
Sequestration Of Co2
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