The sticking phenomenon between molten slag and refractory is one of the crucial problems when preparing ferronickel from laterite ore using rotary hearth furnace or rotary kiln processes This study aims to ameliorate sticking problems by using silicon dioxide SiO2 to adjust the melting degree of the briquette during reduction roasting Thermodynamic analysis
Attempts to beneficiate nickel laterite ores especially low grade limonitic ores Ni < 1% have largely failed due to the dispersion of nickel values between a variety of host minerals
The production of ferronickel concentrate from low grade nickel laterite ore containing % nickel Ni was studied by the non melting reduction magnetic separation process The sodium chloride was used as additive and coal as a reductant The effects of roasting temperature roasting duration reductant dosage additive dosage and grinding time on the grade and
The selective reduction of low grade manganese ore followed by magnetic separation was proposed to produce rich manganese ore The optimized parameters include a roasting temperature of 1050°C a
Effect of reduction temperature and sodium based additives on nickel upgrading process of laterites ores A Shofi A Rahmahwati F Nurjaman B Suharno selective reduction process for nickel laterite was carried out from 950°C to 1150°C for 60 minutes followed by wet magnetic separation using 500 Gausses permanent magnet The
In order to investigate the thermal properties of nickel laterites ores a nickel laterites samples were analyzed by using Differential Thermal Analyzer DTA The result of DTA TG analysis of nickel laterite ores is presented in Figure 2 which shows four steps of the weight loss process First the
The results show reduction roasting followed by magnetic separation is effective for upgrading nickel ores but challenges with this technology are the potentially high reagent usage and
Results show that nickel iron concentrates with nickel grade of % nickel recovery of % iron grade of % and iron recovery of % could be obtained after magnetic separation under the conditions of reduction temperature of 1275 °C reduction time of 50 min slag basicity of carbon containing coefficient of and
Among these laterite comprises 73% of the world s resources of nickel and will be in the future the dominant source of nickel In addition with the continuous depletion of high grade nickel ores such as millerite [NiS] and niccolite [NiAs] nickeliferous laterites have become the major source for the production of nickel as it represents about 60% of the total 130 million
Selective reduction and magnetic separation was conducted on low grade nickel laterite ore High grade nickeliferous concentrate could be produced from these laterite ores The addition of calcium sulphate promoted nickel concentration Nickel was mainly concentrated into a γ Fe Ni phase in the reduced ore Calcium sulphate improved the growth of γ Fe Ni phase
Finally the nickel grades and recovery results were compared to those available in the literature Keywords laterites; limonite; nickel; reduction roasting; magnetic separation 1 Introduction Nickel metal is primarily employed in high nickel alloys and superalloys Nickel utilization is increasing at a rate of about 4% per year [1]
It is shown that nickel concentrate containing % Ni and % Fe was achieved at recoveries of % and % for Ni and Fe respectively under the following conditions reducing at 1120±40 °C for 120 min C/P being wet grinding of reduced pellets up to 70% 87% passing mm and a magnetic field intensity of kA/m
An iron nickel concentrate was obtained after magnetic separation with a nickel grade of % and a nickel recovery of % as well as an iron grade of % and an iron recovery of % [102] The effect of the basicity of the limonitic ores on the selective reduction process was studied by Nurjaman et al [85] [98] Bituminous coal
The treatment of laterites has been a research hotspot in extractive metallurgy over the past decades Industrially the pyrometallurgical treatment of laterites is mostly accomplished with a well established method namely the rotary kiln electric arc furnace RKEF process which includes three main operations—calcination prereduction and
Results show that nickel iron concentrates with nickel grade of % nickel recovery of % iron grade of % and iron recovery of % could be obtained after magnetic separation
The utilization of low grade laterite ores has become necessary due to the intensive mining of high grade nickel sulphide ores for a long time In this the Ni and Co extraction from the oxide ores laterites have become more prevalent The reduction and magnetic separation of low grade nickel laterite was studied at varing
Effect of reduction temperature and sodium based additives on nickel upgrading process of laterites ores To cite this article A Shofi et al 2019 IOP Conf Ser Mater laterite was carried out from 950ºC to 1150ºC for 60 minutes followed by wet magnetic separation using 500 Gausses permanent magnet The characterization of reduced ore was
The treatment of laterites has been a research hotspot in extractive metallurgy over the past decades Industrially the pyrometallurgical treatment of laterites is mostly accomplished with a well established method namely the rotary kiln electric arc furnace RKEF process which includes three main operations—calcination prereduction and
A high nickel grade ferronickel was produced from laterite ore using the selective reduction wet magnetic separation process with the addition of sodium sulfate Na2SO4 The ferronickel
composite ores is widely used due to the close arrangement of ores and carbonaceous materials saving from magnetic separation and the nickel recovery to decline Therefore the appropriate
The present article reviews the insight into the available hydrometallurgical approaches for treating laterite ores and the separation of nickel and cobalt from hydrometallurgy routes The clay rich nickel laterites in Western Australia differ from Moa Bay laterite in mineralogy and have high comparative silica and low chromium content
Pre concentration of nickel in laterite ores using physical separation methods Saeed Farrokhpay1 Lev Filippov1 Daniel Fornasiero1 2 1 Universit de Lorraine GeoRessources CNRS UMR 7359 F 54505 Vandoeuvre lès Nancy France 2 Future Industries Institute University of South Australia Mawson Lakes SA 5095 Australia Corresponding
Ferronickel enrichment and extraction from nickel laterite ore were studied through reduction and magnetic separation Reduction experiments were performed using hydrogen and carbon monoxide as
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