Recycling Red Mud of JSC Ural Aluminum Plant with the Recovery of Iron and Construction Materials

2017 ◽  
Vol 743 ◽  
pp. 331-337 ◽  
Author(s):  
Dmitry Zinoveev ◽  
Pavel Grudinsky ◽  
Vladimir Korneev ◽  
Valery Dyubanov ◽  
Mark Zheleznyi
Keyword(s):  
Rare Earth ◽  
Construction Industry ◽  
Red Mud ◽  
Rare Earth Metals ◽  
Construction Materials ◽  
Pig Iron ◽  
Iron Aluminum ◽  
Landfill Sites ◽  
Reduction Smelting ◽  
Alumina Industry

Red mud is a by-product of alumina industry which is currently almost completely stored in landfill sites without further use. It contains considerable amounts of valuable components such as iron, aluminum, titanium and rare-earth metals. The reduction smelting of red mud was carried out in laboratory scale to recover iron and obtain slag suitable for use in the construction industry. It has been shown that it is expedient to obtain pig iron and slag from the unprocessed red mud. Those two are suitable for the subsequent leaching of aluminum, titanium and rare-earth metals. It is practical to process dealkalized red mud, with composition adjustment by CaO and Al2O3 addition, in order to obtain pig iron and slag in the form of aluminous clinker.

DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION

2018 ◽  
Vol 17 (8) ◽  
pp. 2001-2009
Author(s):  
Tatjana Juzsakova ◽  
Akos Redey ◽  
Le Phuoc Cuong ◽  
Zsofia Kovacs ◽  
Tamas Frater ◽  
...  
Keyword(s):  
Rare Earth ◽  
Red Mud ◽  
Rare Earth Metals ◽  
The Rare Earth

scholarly journals Radiological and physico-chemical characterization of red mud as an Al-containing precursor in inorganic binders for the building industry

2021 ◽  
Vol 36 (2) ◽  
pp. 182-191
Author(s):  
Ljiljana Kljajevic ◽  
Miljana Mirkovic ◽  
Sabina Dolenec ◽  
Katarina Ster ◽  
Mustafa Hadzalic ◽  
...  
Keyword(s):  
Construction Industry ◽  
Natural Radioactivity ◽  
Red Mud ◽  
Building Materials ◽  
Raw Materials ◽  
Construction Materials ◽  
Polymerization Process ◽  
Alkali Activation ◽  
Silica Alumina ◽  
Alkali Activated

The potential re-use of red mud in the building and construction industry has been the subject of research of many scientists. The presented research is a contribution to the potential solution of this environmental issue through the synthesis of potential construction materials based on red mud. A promising way of recycling these secondary raw materials is the synthesis of alkali-activated binders or alkali activated materials. Alkali-activated materials or inorganic binders based on red mud are a new class of materials obtained by activation of inorganic precursors mainly constituted by silica, alumina and low content of calcium oxide. Since red mud contains radioactive elements like 226Ra and 232Th, this may be a problem for its further utilization. The content of naturally occurring radionuclides in manufactured material products with potential application in the building and construction industry is important from the standpoint of radiation protection. Gamma radiation of the primordial radionuclides, 40K and members of the uranium and thorium series, increases the external gamma dose rate. However, more and more precedence is being given to limiting the radiological dose originating from building materials on the population these days. The aim of this research was to investigate the possible influence of alkali activation-polymerization processes on the natural radioactivity of alkali activated materials synthesized by red mud (BOKSIT a. d. Milici, Zvornik, Bosnia and Herzegovina) and their structural properties. This research confirmed that during the polymerization process the natural radioactivity was reduced, and that the process of alkali activation of raw materials has an influence on natural radioactivity of synthesized materials.

scholarly journals Potencial management of waste phosphogypsum with particular focus on recovery of rare earth metals

2015 ◽  
Vol 17 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Kinga Podbiera-Matysik ◽  
Katarzyna Gorazda ◽  
Zbigniew Wzorek
Keyword(s):  
Rare Earth ◽  
Industrial Waste ◽  
Rare Earth Metals ◽  
Construction Materials ◽  
Calcium Sulphate ◽  
Individual Characteristics ◽  
Economic Problems ◽  
Global Environmental ◽  
The Individual ◽  
The Given

Abstract Phosphogypsum is a noxious industrial waste contributing to global environmental and economic problems. This publication focuses above all on phosphogypsum resulting from the processing of apatite as a phosphorus bearing compound, since it contains considerable amounts of lanthanides due to its magma origin. The possibilities of its waste-free processing are large, however they require the application of suitable technologies, frequently expensive ones, and allowing for the individual characteristics of the given waste. The research works conducted so far confirm the possibility of applying phosphogypsum for the recovery of lanthanides, and the process enhances the removal of remaining impurities, thanks to which the purified calcium sulphate (gypsum) may find application for the production of construction materials.

scholarly journals Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminium and Other Valuable Components from the Non-Magnetic Residues Obtained from Red Mud after Iron Removal

2021 ◽  
Author(s):  
Dmitry Zinoveev ◽  
Pavel Grudinsky ◽  
Ekaterina Zhiltsova ◽  
Darya Grigoreva ◽  
Anton Volkov ◽  
...  
Keyword(s):  
High Pressure ◽  
Red Mud ◽  
Acid Leaching ◽  
Dissolution Behavior ◽  
Optimal Conditions ◽  
Liquid Ratio ◽  
Iron Aluminum ◽  
Two Samples ◽  
Alumina Industry ◽  
Pressure Acid Leaching

Red mud is a hazardous waste of alumina industry that contains high amounts of iron, aluminum, titanium and REEs. One of the promising methods for the extraction of iron from red mud is car-bothermic reduction with the addition of sodium salts. This research focuses on the process of hy-drochloric high-pressure acid leaching using 10–20% HCl of two samples of non-magnetic tailings obtained by 60-minute carbothermic roasting of red mud at 1300 °C and the mixture of 84.6 wt. % of red mud and 15.4 wt. % Na2SO4 at 1150 °C, respectively, with subsequent magnetic separation of metallic iron. An influence of temperature, leaching duration, solid-to-liquid-ratio and acid con-centration on dissolution behavior of Al, Ti, Mg, Ca, Si, Fe, Na, La, Ce, Pr, Nd, Sc, Zr were studied. Based on the investigation of the obtained residues, mechanism of passing of valuable elements into the solution was proposed. It has shown that 90% Al, 91% Sc and above 80% of other REEs can be dissolved under optimal conditions; Ti can be extracted into the solution or the residue depending on the leaching temperature and acid concentration. Based on the research results, novel flowsheets for red mud treatment were developed.

scholarly journals Radiological and physico-chemical characterization of red mud as an Al-containing precursor in inorganic binders for the building industry

2021 ◽  
Vol 36 (2) ◽  
pp. 182-191
Author(s):  
Ljiljana Kljajevic ◽  
Miljana Mirkovic ◽  
Sabina Dolenec ◽  
Katarina Ster ◽  
Mustafa Hadzalic ◽  
...  
Keyword(s):  
Construction Industry ◽  
Natural Radioactivity ◽  
Red Mud ◽  
Building Materials ◽  
Raw Materials ◽  
Construction Materials ◽  
Polymerization Process ◽  
Alkali Activation ◽  
Silica Alumina ◽  
Alkali Activated

The potential re-use of red mud in the building and construction industry has been the subject of research of many scientists. The presented research is a contribution to the potential solution of this environmental issue through the synthesis of potential construction materials based on red mud. A promising way of recycling these secondary raw materials is the synthesis of alkali-activated binders or alkali activated materials. Alkali-activated materials or inorganic binders based on red mud are a new class of materials obtained by activation of inorganic precursors mainly constituted by silica, alumina and low content of calcium oxide. Since red mud contains radioactive elements like 226Ra and 232Th, this may be a problem for its further utilization. The content of naturally occurring radionuclides in manufactured material products with potential application in the building and construction industry is important from the standpoint of radiation protection. Gamma radiation of the primordial radionuclides, 40K and members of the uranium and thorium series, increases the external gamma dose rate. However, more and more precedence is being given to limiting the radiological dose originating from building materials on the population these days. The aim of this research was to investigate the possible influence of alkali activation-polymerization processes on the natural radioactivity of alkali activated materials synthesized by red mud (BOKSIT a. d. Milici, Zvornik, Bosnia and Herzegovina) and their structural properties. This research confirmed that during the polymerization process the natural radioactivity was reduced, and that the process of alkali activation of raw materials has an influence on natural radioactivity of synthesized materials.

scholarly journals Research on High-Pressure Hydrochloric Acid Leaching of Scandium, Aluminum and Other Valuable Components from the Non-Magnetic Tailings Obtained from Red Mud after Iron Removal

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 469
Author(s):  
Dmitry Zinoveev ◽  
Pavel Grudinsky ◽  
Ekaterina Zhiltsova ◽  
Darya Grigoreva ◽  
Anton Volkov ◽  
...  
Keyword(s):  
High Pressure ◽  
Acid Concentration ◽  
Red Mud ◽  
Acid Leaching ◽  
Dissolution Behavior ◽  
Liquid Ratio ◽  
Iron Aluminum ◽  
Two Samples ◽  
Alumina Industry ◽  
Pressure Acid Leaching

Red mud is a hazardous waste of the alumina industry that contains high amounts of iron, aluminum, titanium and rare-earth elements (REEs). One of the promising methods for the extraction of iron from red mud is carbothermic reduction with the addition of sodium salts. This research focuses on the process of hydrochloric high-pressure acid leaching using 10 to 20% HCl of two samples of non-magnetic tailings obtained by 60 min carbothermic roasting of red mud at 1300 °C and the mixture of 84.6 wt.% of red mud and 15.4 wt.% Na2SO4 at 1150 °C, respectively, with subsequent magnetic separation of metallic iron. The influence of temperature, leaching duration, solid-to-liquid-ratio and acid concentration on the dissolution behavior of Al, Ti, Mg, Ca, Si, Fe, Na, La, Ce, Pr, Nd, Sc, Zr was studied. Based on the investigation of the obtained residues, a mechanism for passing valuable elements into the solution was proposed. It has shown that 90% Al, 91% Sc and above 80% of other REEs can be dissolved under optimal conditions; Ti can be extracted into the solution or the residue depending on the leaching temperature and acid concentration. Based on the research results, novel flowsheets for red mud treatment were developed.

Reduction Smelting of Iron-Manganese-Ree Ores of the Tomtor Deposit

2020 ◽  
Vol 989 ◽  
pp. 498-503
Author(s):  
Dmitry Zinoveev ◽  
Valery Dyubanov ◽  
Leonid Delitsyn
Keyword(s):  
Rare Earth ◽  
Phase Composition ◽  
Chemical Composition ◽  
Thermodynamic Calculation ◽  
Rare Earth Metals ◽  
Reduction Smelting ◽  
Phase And Chemical Composition ◽  
Iron Manganese

The chemical and phase composition of iron-manganese rare-earth ores of the Tomtor deposit were investigated. It is shown that the ores contain a large amount of iron, manganese and rare earth metals. The thermodynamic calculation of reduction smelting was carried out. The reduction smelting of the ores at 1650 °C was investigated. The phase and chemical composition of the obtained slag and the alloy were studied. It is showed that obtained alloy is ferromanganese with a high content of carbon and phosphorus, and obtained slag has high content of REM.

scholarly journals Limestone Addition Effect on Phase Composition of Red Mud Reduction Roasting Products

2017 ◽  
Vol 2 (2) ◽  
pp. 52
Author(s):  
Mikheenkov M.A. ◽  
Sheshukov O.Yu. ◽  
Lobanov D.A. ◽  
Nerkasov I.V. ◽  
Egiazaryan D.K. ◽  
...  
Keyword(s):  
Phase Composition ◽  
Solid Waste ◽  
Red Mud ◽  
Raw Material ◽  
Pig Iron ◽  
Reduction Roasting ◽  
Protection Measures ◽  
Iron Iron ◽  
Alumina Industry ◽  
Iron Bearing

<p>There are millions of tons of solid waste residues accumulated in present-day alumina industry.  Those solid waste residues contain red mud and belit mud. The creation of sludge depository, its keeping and taking environmental protection measures cost up to $8-12 million a year.  However, red mud is a valuable raw material. The extraction of some useful elements from red mud makes it possible to obtain such valuable products as pig iron, iron-bearing concentrate, rare-earth elements, alumina concrete, constructional materials, etc. </p>

Magnetic susceptibility of liquid heavy rare earth metals

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-260-C5-261 ◽  
Author(s):  
M. Müller ◽  
E. Huber ◽  
H.-J. Güntherodt
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Rare Earth Metals ◽  
Heavy Rare Earth
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