Pilot-scale plant study on solid-state metalized reduction–magnetic separation for magnesium-rich nickel oxide ores

2017 ◽  
Vol 169 ◽  
pp. 99-105 ◽  
Author(s):  
Baozhong Ma ◽  
Weijiao Yang ◽  
Peng Xing ◽  
Chengyan Wang ◽  
Yongqiang Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Nickel Oxide ◽  
Magnetic Separation ◽  
Pilot Scale

scholarly journals Solid-state fermentation of soybean residues for bioflocculant production in a pilot-scale bioreactor system

2014 ◽  
Vol 70 (6) ◽  
pp. 1032-1039 ◽  
Author(s):  
Zufarzaana Zulkeflee ◽  
Antoni Sánchez
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Microbial Growth ◽  
Future Prospect ◽  
Pilot Scale ◽  
Scale Level ◽  
Bioactive Materials ◽  
Current Dependence ◽  
Death Phase ◽  
Bioreactor System

An innovative approach using soybean residues for the production of bioflocculants through solid-state fermentation was carried out in 4.5 L near-to-adiabatic bioreactors at pilot-scale level. An added inoculum of the strain Bacillus subtilis UPMB13 was tested in comparison with control reactors without any inoculation after the thermophilic phase of the fermentation. The flocculating performances of the extracted bioflocculants were tested on kaolin suspensions, and crude bioflocculants were obtained from 20 g of fermented substrate through ethanol precipitation. The production of bioflocculants was observed to be higher during the death phase of microbial growth. The bioflocculants were observed to be granular in nature and consisted of hydroxyl, carboxyl and methoxyl groups that aid in their flocculating performance. The results show the vast potential of the idea of using wastes to produce bioactive materials that can replace the current dependence on chemicals, for future prospect in water treatment applications.

Experimental Study on Recovery of Nickel from Nickel-Bearing Laterite

2014 ◽  
Vol 881-883 ◽  
pp. 1611-1615
Author(s):  
Xian Hai Li ◽  
Bi Yang Tuo ◽  
Qin Zhang ◽  
Shen Jun Zhang
Keyword(s):  
Nickel Oxide ◽  
Magnetic Separation ◽  
Reduction Temperature ◽  
Experimental Conditions ◽  
Nickel Recovery ◽  
Technology Process ◽  
Research Findings ◽  
Simple Technology ◽  
Effective Result ◽  
Laterite Ore

It is known that to extract nickel from nickel-bearing laterite ore is not an easy job. By reducing roast-magnetic separation, an effective result is achieved in this research in dealing with nickel-bearing laterite ore due to its simple technology process and the high nickel recovery. Nickel-bearing laterite studied in this research is mainly characterized by fine disseminated grain size and easy argillation. Thus, valuable mineral (i.e. nickel oxide) can not be effectively separated from the nickel-bearing laterite ore simply by regular mineral processing technology. To solve the problem, both reducing roast and wet magnetic separation are adopted in the study with the purpose of making up the lack of dynamics so as to reduce the reduction temperature of nickel laterite. Flux catalyst is added to strengthen the reducing reaction of nickel oxide and iron oxide. The optimistic experimental conditions are determined as following: the consumption of the flux catalyst agent and the reducing agent are 5% and 4% (by weight) respectively, the reduction temperature remains at 1200°C, the reduction time is 2h, and the appropriate magnetic field intensity is 240 RA/m. The research findings show that the nickel grade of the concentrate increases from 1.58% to 5.49%, with its recovery reaching above 80 %.

scholarly journals The Recovery of Valuable Metals from Ocean Polymetallic Nodules Using Solid-State Metalized Reduction Technology

Minerals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 20 ◽  
Author(s):  
Feng Zhao ◽  
Xunxiong Jiang ◽  
Shengdong Wang ◽  
Linyong Feng ◽  
Da Li
Keyword(s):  
Solid State ◽  
Magnetic Separation ◽  
Ferrous Metal ◽  
Mineral Resources ◽  
Metal Extraction ◽  
Metallic State ◽  
Ferrous Metals ◽  
Polymetallic Nodules ◽  
Valuable Metals ◽  
Pre Treatment

Ocean polymetallic nodules are oxide ores rich in Ni, Co, Cu, and Mn, which are valuable metals found in deep-sea mineral resources. Such non-ferrous metals do not exist in isolation, and producing concentrates using conventional mineral separation techniques is challenging without pre-treatment. We propose an effective, environmentally-friendly recovery technology combined with solid-state metalized reduction treatment and magnetic separation to recycle these metals from ocean polymetallic nodules. We conducted single-factor tests to investigate the effects of additives, anthracite dosage, duration, and reduction temperature on metal recovery and to obtain optimal operating parameters. We found that valuable metals in ocean polymetallic nodules may be selectively reduced to a metallic state. Only a fraction of Mn was reduced to metal. The reduced metals were recovered to concentrates using magnetic separation. More than 80% of these metals were concentrated to magnetic concentrates with mass ratios of 10–15%. The recovery rates of Ni, Co, Cu, Mn, and Fe in concentrates were optimum at 86.48%, 86.74%, 83.91%, 5.63%, and 91.46%, respectively, when using CaF2 4%, anthracite 7%, SiO2 dosage 5%, and FeS 6% at 1100 °C for 2.5 h. This approach to non-ferrous metal extraction using conventional hydrometallurgical processes could be a step toward practical industrial-scale techniques for the recovery of metals from polymetallic nodules.

Pilot scale test of producing nickel concentrate from low-grade saprolitic laterite by direct reduction-magnetic separation

2014 ◽  
Vol 21 (5) ◽  
pp. 1771-1777 ◽  
Author(s):  
Guo-lin Zheng ◽  
De-qing Zhu ◽  
Jian Pan ◽  
Qi-hou Li ◽  
Yue-ming An ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Direct Reduction ◽  
Pilot Scale ◽  
Low Grade ◽  
Nickel Concentrate ◽  
Scale Test ◽  
Pilot Scale Test

Internal flow measurements in pilot scale wet low-intensity magnetic separation

2016 ◽  
Vol 155 ◽  
pp. 55-63 ◽  
Author(s):  
Jan F. Stener ◽  
Johan E. Carlson ◽  
Anders Sand ◽  
Bertil I. Pålsson
Keyword(s):  
Magnetic Separation ◽  
Internal Flow ◽  
Pilot Scale ◽  
Flow Measurements ◽  
Low Intensity

scholarly journals Magnetic Separation Research: A Survey of Some Activities in The Netherlands

1984 ◽  
Vol 1 (3) ◽  
pp. 123-138
Author(s):  
C. B. W. Kerkdijk ◽  
R. P. A. R. van Kleef ◽  
J. A. Roeterdink
Keyword(s):  
Magnetic Separation ◽  
Superconducting Magnets ◽  
Pilot Scale ◽  
Energy Research ◽  
Auxiliary Equipment ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
Coal Cleaning ◽  
Research Organisations ◽  
The University

A survey of magnetic separation research at FDO Engineering consultants, the University of Nijmegen, and the Energy Research Foundation (ECN) will be given.FDO efforts were primarily on coal cleaning using the high gradient magnetic separation (HGMS) technique. The Institute for Materials of the University of Nijmegen performs fundamental studies on magnetic flocculation. A continuous flow magnetic separator is briefly described. The Energy Research Foundation has built and operates an HGMS–system with superconducting magnets. Auxiliary equipment enables the execution of well controlled HGMS pilot scale tests.Intensive contacts and cooperation exist between scientists of the 3 research organisations, and with other industries which are interested in magnetic separation applications.

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