Nickel laterite ores account for almost 70 % of the nickel worldwide reserves of nickel (Moskalyk and Alfantazi, 2002; Santos et al., 2020). Despite this, only 40 % of global nickel production comes from laterites, since they are usually low-grade, complex and expensive to treat ores (Asadrokht and Zakeri, 2022; Friedrich et al., 2020; Oxley et ...

In a study of the reduction roasting-magnetic separation of saprolite laterite in the presence of Na 2 SO 4, the addition of Na 2 CO 3 increased the grade of nickel and iron from 2.0% and 57.2% to 7.5% and 80.5%, respectively, and the recovery was also improved from 19.1% and 33.6%, to 82.7 and 58.8%, respectively.54 A further …

The main finding of this work was that magnetic separation is effective in recovering 48% of nickel from laterite, increasing the Ni grade in the recovered product from 1.5% to 2.9%, when prior to the separation the ore was calcinated at 500 °C for 1 h. Previous article in issue. article in issue.

The chemical assays of the laterite samples are provided in Table 2. The nickel head grade of ores L, I and S (at <300 μm size fraction) was found to be 1.2%, 1.1%, and 3.0%, respectively. Nickel was found, more or less, at the same grade in all size fractions in these laterite ore samples.

2.4. Reduction process and magnetic separation. The reduction of the prepared nickel laterite ore (PM or IM) with a combined mass of 1 kg was performed in a stirred fluidised-bed reactor, which is a laboratory constructed, cylindrical heat-resistant stainless steel reactor.In a typical reduction process, the effect of different parameters …

The chloridization and reduction roasting of high-magnesium, low-nickel oxide ore containing 0.82 pct Ni and 31.49 pct MgO were investigated in this study. Mineralogical investigation indicated that 84.6 pct of nickel was associated with silicates, and nickel was well distributed in mineral in the form of isomorphism. A series of …

In this present work, the selective reduction of nickel laterite was conducted by using 10 wt. % of sodium carbonate, sodium chloride and sodium sulphate as additives. The 5 wt. % of palm shell charcoal was used as the reductant. The selective reduction process for nickel laterite was carried out from 950ºC to 1150ºC for 60 minutes followed by wet magnetic …

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).

DOI: 10.1016/S1003-6326(10)60017-9 Corpus ID: 97138138; Pretreatment study on chloridizing segregation and magnetic separation of low-grade nickel laterites @article{Liu2010PretreatmentSO, title={Pretreatment study on chloridizing segregation and magnetic separation of low-grade nickel laterites}, author={Wanrong Liu and Li Xinhai …

these deposits are amenable to pyrometallurgical pro-cesses such as rotary kilns-electric furnaces (RKEF), the Krupp-Renn process, and so on.[1,7,8] The complex mineralogy of laterites ores is not amenable to beneficiation by physical methods.[1,9] Thus, a number of investigations of low-grade nickel laterites ores have been performed.

hydrometallurgical nickel laterite ore processing str eams obtained from a HP AL (high-pressure. sulphuric acid leaching) process. In order to selectively precipitate and concentrate scandium with ...

In this work, the experiment was conducted to investigate the effect of temperature and sub-bituminous coal on upgrading nickel laterites ores by carbothermic reduction. The reduction was carried out in the muffle furnace at a temperature ranging of 800-1100 °C. The produced calcine from reduction step was grounded in vibrating mill, …

by magnetic separation is regarded as a possible alternative to low-grade ferro-nickel production. This process was reported to be important, especially for low-grade laterites and the case where

In this present work, the selective reduction of nickel laterite was conducted by using 10 wt. % of sodium carbonate, sodium chloride and sodium sulphate as additives. The 5 wt. % of palm shell charcoal was used as the reductant. The selective reduction process for nickel laterite was carried out from 950ºC to 1150ºC for 60 minutes followed by wet …

An iron-nickel concentrate was obtained after magnetic separation with a nickel grade of 7.0 % and a nickel recovery of 94.06 %, as well as an iron grade of 34.7 % and an iron recovery of 80.4 % [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 ...

DOI: 10.1016/J.MINPRO.2012.01.003 Corpus ID: 97937238; Upgrading low nickel content laterite ores using selective reduction followed by magnetic separation @article{Zhu2012UpgradingLN, title={Upgrading low nickel content laterite ores using selective reduction followed by magnetic separation}, author={De‐qing Zhu and Yu Cui …

The main finding of this work was that magnetic separation is effective in recovering 48% of nickel from laterite, increasing the Ni grade in the recovered product from 1.5% to 2.9%, when prior to the separation the ore was calcinated at 500 °C for 1 h. Ó 2010 Elsevier Ltd.

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. ... 2.1.1 Global distribution of Nickel Ore. Nickel laterites are found in Indonesia, Philippines, New Caledonia, and Murrin Murrin in Western Australia ...

Typical low grade nickel laterites are around 1% nickel and 0.05% cobalt and show a bias of nickel distribution toward the finer and mid-sized particles respectively with coarse particles generally

Keywords: laterites; ore reduction; magnetic separation; thermodynamics; fine particle metallurgy 1. Introduction According to the survey report of the United States Geo-logical Survey (USGS), approximately 60% of nickel re-sources in the Earth's crust are in the form of nickel laterite ore, and the rest belongs to nickel-bearing sulfide ore ...

Beneficiation of nickel with a magnetic separation method Wet (because of the particle size of the sample) magnetic separation tests were done on nickel samples with d100 = 105µm size and 10%pulp density to 25% in magnetic fields of 1000 to 8000 Gauss. Fig. 5(a), shows the nickel recovery changes vs magnetic field and pulp density.

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.

It is shown that nickel concentrate containing 3.13 % Ni and 59.20 % Fe was achieved at recoveries of 84.36 % and 71.51 % for Ni and Fe, respectively under the following conditions: reducing at (1120±40) °C for 120 min, C/P being 1.0, wet grinding of reduced pellets up to 70%–87% passing 0.074 mm and a magnetic field intensity of …

The best method to enrich the laterite ore is found to be hydrocycloning after grinding and then flotation of underflow after further grinding. With this method 60% of Ni is recovered with 3.3% Ni grade in concentration and 1.3% Ni …

In this case, the ferro-nickel alloy with nickel grade 7.90% and iron grade 77.32% was prepared successfully from the low-grade saprolitic ore with nickel content 1.82%.

Under the optimum calcination conditions, the nickel recovery for limonite, saprolite and transition laterite ore could reach 68.5%, 68.9% and 67.3%, respectively, while the nickel contents in magnetic fraction are 3.01%, 3.23% and 3.15% with increasing by 1.82, 2.27 and 2.11 times, respectively.

Pretreatment study on chloridizing segregation and magnetic separation of low-grade nickel laterites. Trans. Nonferrous Metals Soc. China, 20 (1) (2010), pp. 82-86. Google Scholar ... Chloridization and reduction roasting of high magnesium low-nickel oxide ore followed by magnetic separation to enrich ferronickel concentrate. Metall. …

Nickel ore is found in two types sulfide and laterite. ... are 1:4 and gave heat treatment at 1150 °C with 1 h holding time and magnetic separation for getting to know the optimum nickel grade ...

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]. Nickel is used in stainless steels, non-ferrous alloys and plating applications.

Nickel plays an important role in modern manufacturing [].It is the essential element for stainless steel production, which accounts for 65% of nickel consumption [].In recent years, the global annual demand for nickel has increased tremendously due to soaring stainless steel production, particually in China [3,4,5].Nickel sulfide and laterite …