Related Papers
IRON CONTROL IN HYDROMETALLURGY: THE POSITIVE SIDE OF THE COIN
HouseofDjs DJ DeepSoul
During the hydrometallurgical processing of the major base metals Cu, Zn, Ni and Co, the presence of iron is normally a serious complication, and iron separation from the pay metals usually constitutes one of the main challenges for the metallurgist. There are many instances, however, where the presence of iron is beneficial, or is even required. Two cases are presented where iron is required during the processing of base metals. The first example deals with the use of ferric sulphate to oxidize sulphides, more particularly copper and zinc sulphides, under atmospheric conditions. The results presented confirm that ferric ion leaching is efficient, particularly when the oxidant is regenerated during the process. The second case is the use of iron to solubilise refractory cobalt oxide minerals; examples, including pilot plant results, are presented for various ores from Africa and Central America. In both cases, this paper reviews the basic concepts involved and provides details of their application.
RECENT TRENDS IN EXTRACTIVE METALLURGY
Akbarul Muttaqin
While pyrometallurgical processes are old technology and were the dominant and logical route used to treat sulfide concentrates they are now challenged by new hydrometallurgical processes. In these new processes there have been attempts in the past few years to avoid using autoclaves in the treatment of concentrates of zinc, copper, and nickel. The situation has been recently reversed and pressure hydrometallurgy is being applied in many operations. An outline of these processes is given and the future trend is discussed.
Journal of Minerals and Materials Characterization and Engineering
Removal of Silica and Alumina as Impurities from Low-Grade Iron Ore Using Wet High-Intensity Magnetic Separation and Reverse Flotation
Moses Siame
Minerals Engineering
Gas phase extraction of iron from its oxide in a fluidized bed reactor
2010 •
J. Potgieter
Journal- South African Institute of Mining and Metallurgy
Kinetic studies on the leaching reactions in the autoclave circuit of the Tati Hydrometallurgical Demonstration Plant
Olayinka Oyetunji
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 •
Dmitriy Zinoveev
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 carbothermic reduction with the addition of sodium salts. This research focuses on the process of hydrochloric 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 concentration 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 co...
The use of heavy-medium separation in the processing of iron ores
Abarasi Hart
The paper discusses various aspects of the application of heavy-medium separation to the processing of hematite ore at Sishen and Thabazimbi. The two main factors to be borne in mind in the design of a plant for such beneficiation are the Iow unit value of the iron ore produced and the high separation densities required. The four factors of importance in the avoidance of high viscosity in the ferrosilicon medium are discussed in turn. SAMEVATTING Die referaat handel oor verskillende aspekte van die toepassing van swaarmediumskeiding op die verwerking van hematieterts by Sishen en Thabazimbi. Die twee hooffaktore wat by die ontwerp van 'n aanleg vir sodanige veredeling in gedagte gehou moet word, is die lae eenheidswaarde van die ystererts wat geproduseer word en die hoe skeidingsdigthede wat nodig is. Die vier belangrike faktore in verband met die voorkoming van 'n hoe viskositeit in die ferrosilikonmedium word volledig bespreek.
A Brief Review of Hydrometallurgical Methods in Extractive Metallurgy of Marine Ores
2018 •
yakup tanrıkulu
Marine surroundings (i.e., Seas and Oceans) constitute about 71% of the earth’s surface. It consists of an enormous reservoir of numerous mineral deposits such as massive sulfides, manganese nodules and cobalt-rich ferromanganese crusts. These mineral deposits could be a possible choice to satisfy the rising demand for raw materials and ores in the metal industry. Since 1960’s a variety of metallurgical processes (pyro/hydrometallurgical) have been developed to deal with marine ore deposits and extract different metals such as Au, Cu, Ni, Co etc. hydrometallurgical methods as proven technological treatments could be applied to the extraction of metals from concentrates (after pretreatments like crushing, grinding, physical separation, flotation, etc.) or directly from crushed marine ores. In this paper, we briefly review developments of hydrometallurgical treatments (mainly leaching, modern bio-hydrometallurgical processes) of marine ores.
Metals
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
Dmitriy Zinoveev
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 b...
Experimental study on the beneficiation of low-grade iron ore fines using hydrocyclone desliming, reduction roasting and magnetic separation
2014 •
Steven P Suthers, Venkata Nunna, Sarath Hapugoda
Beneficiation of -2 mm low-grade iron ore tailings (50.7% Fe, 10.8% SiO2 and 4.4% Al2O3) from Western Australia was studied. The sample consisted of hydrohematite, goethite and quartz, with lesser kaolinite and shale. Two processing options were tested, being wet high-intensity magnetic separation (WHIMS) either using deslimed or untreated feed, and reduction (magnetising) roasting of deslimed feed followed by Davis tube tests. WHIMS tests using deslimed feed gave a product having 55.4% Fe, 6.1% SiO2 and 2.7% Al2O3, while the iron recovery was 55.7%. The calcined iron grade was 62.1% Fe. Davis tube tests using deslimed feed that had been reduction roasted at 700°C using a 1:1 mixture of CO/CO2 gave a product with 63.2% Fe, 5.4% SiO2 and 2.9% Al2O3, while the iron recovery was 60.1%. Overall, desliming followed by reduction roasting and Davis tube tests produced the highest grade product with the highest iron recovery.
