Laterite Iron Ore Process

In this study, direct extraction of nickel and iron from laterite ores was investigated in a two step process using CVMR's carbonyl technology. Iron turns out to be an important …

In the leaching process, the iron minerals are dissolved first in the form of Fe 2+ and Fe 3+, and Fe 2+ is rapidly oxidized to Fe 3+. ... Clay mineralogy of the nickel laterite ore developed from serpentinised peridotites at Murrin Murrin, Western Australia. Aust. J. Earth Sci., 52 (2) (2005), pp. 231-241.

The two main processing methods for laterite ores are smelting and High-Pressure Acid Leaching (HPAL). Smelting is used primarily on saprolite ores to obtain an iron-nickel alloy (ferronickel – FeNi, Nickel Pig Iron – NPI) while HPAL is used primarily to process limonite or for higher-purity end products.

Industrially, the pyrometallurgical treatment of laterites is mostly accomplished with a well-established method, namely, the rotary kiln–electric arc furnace (RKEF) process, which …

The dehydration process of limonitic laterite ore consumes a lot of heat, which seriously affects the sintering performance and increases the solid fuel consumption of sintering. In this paper, the sintering performance and mechanism of limonitic laterite ore strengthened by a coating with calcined lime was studied. The results show that, when the coating proportion of …

nickel ore resources from sulphide ore becomes rare which makes nickel laterite ore as the future of nickel extraction. Unlike sulphide nickel ore processing, laterite nickel ore processing requires higherprocessing energy through smelting.Therefore, a novel method to process laterite nickel ore using lower energy is needed.

The IFCON ® process developed in South Africa can be regarded as an important milestone from the 1990s in the treatment of iron ore and coal mixture to obtain steel in a single vessel . Similarly, envirosteel smelter (ESS) technology can be adapted to produce ferro-nickel in a single furnace, in which oxide-type nickel ore is charged together ...

Reduction and Novel Process for Preparing Ferronickel from Laterite Ore Abstract Due to the shortage of laterite ore resources in China, most of the ... reduction/sulfidation behaviors of nickel and iron oxides in the ore as well as the growth of ferronickel particles during solid-state reduction were investigated. ...

Primary nickel is produced from both lateritic and sulfidic ores. Lateritic ores are formed by prolonged weathering of ultramafic rocks. The laterite deposits exhibit graded layers of ore, with high iron, low nickel ore on top and low iron, high nickel ore below. The...

Iron Ore Production: Certain lateritic deposits are enriched in iron oxides, contributing to the global production of iron ore. Phosphate Production: Lateritic soils can …

Sodium sulfate is found to be capable of enhancing the reduction of laterite ore through liberating iron and nickel from Ni/Fe substituted-lizardite, as well as increasing the size of ferronickel ...

Many research teams made a successful attempt to extract iron from laterite soil chemically by acid digestion method and studied the catalytic role of extracted laterite iron in Fenton's process [13–15, 17]. In the present study initial pH was fixed to acidic pH because of proven process efficiency at acidic range.

The ore sample was roasted at 400–1000 °C for 60 min. Calcination of laterite ore was also tested in the temperatureprogrammed experiments using thermogravimetric analysis (TG) and differential thermal analysis (DTA) (PerkinElmer STA 6000) with heating rate of 10 °C/min and a maximum temperature of 900 °C.

In nickel-bearing laterite ores, mineralogical studies have revealed that there is no discrete mineral phase from nickel. Iron is found in goethite, which is the host rock or principal phase in raw laterite ore which contains the majority of nickel. The laterite ore also contained hematite, nickel ferrite (NiFe 2 O 4), garnierite, and quartz ...

There are two methods of processing nickel laterite, namely hydrometallurgy and pyrometallurgy. The former is a method that uses leaching by a chemical solution or solid such as acid, as a...

The chemical element composition of acid-leaching tailings of laterite nickel ore is presented in Table 1. The iron in acid-leaching tailings of laterite nickel ore dissolves and ends up in the tailings after the leaching process, the iron content in acid-leaching tailings of laterite nickel ore was relatively high at 40.89 wt%.

The demand for nickel has been steadily increasing in the 21st century, primarily driven by the rising demand for electric vehicle batteries. Nickel in laterite is associated within silicate in saprolite ore and hydroxide/oxide in limonite ore. Recently, the sulfation–roasting–leaching process has been developed to address the challenges of …

Nickel ore is found in two types sulfide and laterite. The sulfide is a nickel ore that has high nickel content and low reserves of natural resources than of the zinc laterite.

After conducting reduction roasting at a temperature of 1200 °C for 60 min, a concentrate with 87% iron content, 0.7% sulfur content, and an 82% iron recovery was achieved. Tang et al. [11] conducted research on the utilization of leaching residues from laterite nickel ore using the HPAL process, featuring an iron content of 54.22%. Through ...

laterite ore types are suitable for certain process, such as crystals for leaching high pressure acids or saprolite for RKEF. A significant problem is the presence of MgO and SiO. 2. contents which will affect reductibility level on temperature used in the process. Reduction results from laterite will produce forsterite (Mg. 2. SiO. 4 ...

Selective flocculation process has been commercialised for iron ore to process finely disseminated large deposits of oxidised taconites containing predominantly hematite and goethite ... Upgrading of iron-rich laterite ore using reverse flotation. A. Maleque, I.I. Yaacob, Z. Halim (Eds.), Contemporary Metallic Materials, IIUM Press, Malaysia ...

The abundant nickel laterite ore is generally used for ferronickel preparation through sintering-blast furnace process due to its relatively higher iron grade . However, limonitic nickel laterite is characterized by high content of crystal water and large amount of high-melting components, which are adverse to the formation of liquid phase ...

Over the past 30 years laterite ores have become increasingly more important as a source of nickel metal (Dalvi et al., 2004).Several methods of nickel extraction from laterite ores have been piloted and some were put into full operation, including acid leach with sulphuric, nitric and hydrochloric acids, ammonia leach and the pyrometallurgical process (Superiadi, 2007).

Beginning with description of the physical and chemical characteristics of laterite ore including dehydration treatment, the process is started with comminution and agglomeration …

The dehydration process of limonitic laterite ore consumes a lot of heat, which seriously affects the sintering performance and increases the solid fuel consumption of sintering.

The DNi Ni Process™ is a unique technology which can process the full laterite ore profile (limonite, saprolite, and transition zone) with nitric acid, and which extracts all the metals contained in the feed. ... We're exploring the application of our technology to refractory gold ore, values bearing iron sulphide ores and rejects as well ...

Hydrogen, carbon monoxide and coal could be used for laterite ore reduction. The process is well investigated and widely used for production of DRI, ... Based on today's LME prices of Ni and steel billets, iron, produced from low grade laterite ore (samples #1 and #3), will have the same value as the nickel product. Addition of Co, Cu and PGE ...

An effective strategy to achieve separation and recovery of iron and nickel from low-grade laterite ore via microwave carbothermic reduction roasting is reported. In this work, we …

Both hydrometallurgical and pyrometallurgical processes can be used to extract nickel from the laterites. However, due to its high nickel content, saprolite ore is better …

2.1 Materials. The limonitic laterite used in this study was derived from the Philippines. As shown in Table 1, the stainless steel swarf with 61.28% Fe total contained 3.21% Cr 2 O 3 and 1.30% NiO. The Fe total and Al 2 O 3 content in the limonitic laterite were respectively 52.61% and 6.19%. As shown in Fig. 1, FeO(OH) was the main phase of limonitic …