Synchronous Extraction of Valuable Metals from Low-Nickel …
The minerals are crushed and screened to obtain ~200 mesh powder samples (< 74 μm), then dried at oven 80 ºC for 24 h. Generally, 1.0 g of low-nickel matte and 0.1 g of ammonium sulfate were mixed in an agate mortar, then transferred to the Al 2 O 3 crucible for sulfation roasting in a tube furnace. After roasting, the roasting …
Recovery of valuable metals from a low-grade nickel ore …
By optimizing the two-stage roasting process, first roasting temperature at 295°C with particle size of 80–91 μm with an acid-ore ratio of 1.1:1 for 2 h, and second roasting temperature at 620 ...
Effective extraction of nickel and cobalt from sintered nickel …
Effective extraction of Ni and Co has been achieved by roasting and leaching process. •. Nickel oxides are converted into easily leached metallic nickel by reduction …
Effects of Na2SO4 on iron and nickel reduction in …
This study investigates the reactions of Na 2 SO 4 and its effects on iron and nickel reduction in the roasting of a high-iron and low-nickel laterite ore through gas composition, X-ray diffraction, and …
Roasting in Metallurgy
Croasdale found, from experiments on a number of ores, that from 80 to 99 per cent, of the gold contained in them could be volatilised by roasting with salt. Cooling Roasted Ore. This was formerly effected by spreading the roasted ore on sheet-iron floors, and either leaving it for twenty-four hours, or damping it down by a hose-pipe.
Mechanism of the Chlorination Roasting of Nickel Sulphide …
Nickel resources are mainly in the form of sulphides in China, and chlorination roasting is one of the most important means of treating nickel sulphide ore. This paper reports the results of an investigation of the reaction mechanism of ammonium chloride roasting of flotation concentrate.
Recent Progress in Hydrometallurgical Processing of Nickel Lateritic Ore
An investigation on the reduction roasting and ammonia leach methods of treating lateritic nickel ore (Caron process showed satisfactory extractions for limonitic ore, i.e., material high in iron oxides and low in silicates) is reported . The Caron leaching method works with oxide laterites ("limonite") that can tolerate some silicate ...
Generation process of FeS and its inhibition mechanism on
Numerous studies have demonstrated that Na2SO4 can significantly inhibit the reduction of iron oxide in the selective reduction process of laterite nickel ore. FeS generated in the process plays an important role in selective reduction, but the generation process of FeS and its inhibition mechanism on iron reduction are not clear. To figure this …
Efficient Synchronous Extraction of Nickel, Copper, and …
According to the course of sulfation roasting reaction, the role and behavior of sodium sulfate in the sulfation roasting process were further investigated. ... Mu W, et al. Synchronous extraction of nickel and copper from a mixed oxide–sulfide nickel ore in a low–temperature roasting system. Journal of cleaner production. 2018; 177:371 ...
Roasting and Leaching Behavior of Nickel Laterite Ore
The sulfation-roasting-leaching process has the potential to change this scenario once it can be applied to all kinds of nickel laterite ores and does not consume much acid, as in the atmospheric ...
Processing of oxidized nickel ores using sintering, roasting …
Abstract. The article is devoted to the results of research into the process of sintering, roasting and leaching of oxidized nickel ores, with selection of optimal …
Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide …
Roasting and Leaching Behavior of Nickel Laterite Ore
Experimental results indicated that nickel forms sulfates through three different ways: reacting with H2SO4 during sulfation, with Fe2 (SO4)3 (ferric sulfate) or …
The reduction of nickel from low-grade nickel laterite ore …
In fact, nickel laterite ore is a complex ore, which include NiO, Fe 2 O 3, Fe 3 O 4, etc., so other reactions simultaneously take place in the reduction process.Based on the reduction of trevorite, NiO·Fe 2 O 3, with the preferential reduction of nickel oxide to metallic nickel can be stated (4), (5), (6) (Olli et al., 1995): (4) 3 NiO · Fe 2 O 3 + CO = 3 …
Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore …
have shown that incomplete sulfation of nickel is still exhibited during the roasting process, even after increasing the dosage of ammonium sulfate [2]. Therefore, there remain some ambiguities regarding the reaction mechanism of ammonium sulfate activation roasting of nickel ore, and there is a bottleneck to higher sulfation of nickel.
Nickel processing
Nickel processing - Extraction, Refining, Alloying: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating …
Synchronous extraction of nickel and copper from a
Mixed oxide-sulfide nickel ore is becoming the major source of nickel produced in the nickel smelting enterprise due to the increasing global demand of nickel and the depletion of high-grade nickel sulfide ore.Low temperature roasting technique by ammonium sulfate is a potential cleaner production process with high metal recovery, …
Separation of nickel and iron from lateritic ore using a …
This paper investigates extraction of nickel and iron from a lateritic nickel ore from the Caldag region of Manisa in Turkey. The ore sample contains 1.2% Ni, 24.77% Fe and 0.062% Co.
High-Grade Ferronickel Concentrates Prepared from Laterite Nickel Ore …
Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical separation methods. In this study, high-grade ferronickel concentrates …
Roasting and Leaching Behavior of Nickel Laterite Ore
The extraction of the main metals (Al, Ca, Co, Fe, Mg, Mn, Ni, and Zn) from the sample after roasting in three different temperatures (680 °C, 700 °C, and 740 °C), is presented in Figure 19. Nickel recovery increased from 80.3 pct with roasting at 680 °C …
Roasting | SpringerLink
This reaction starts at 290 °C and can remove all the sulfur at 400 °C. Chlorination Roasting. With chlorinating agents (such as Cl 2, HCl, NaCl, CaCl 2, etc.), certain components in the materials are transformed into gaseous or condensed chlorides, thereby separating them from others.For example, rutile is chlorination roasted by …
Extraction of Nickel from Garnierite Laterite Ore Using Roasting …
In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% ...
Extraction Behavior of Nickel and Cobalt From Serpentine-Rich Ore
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 …
Roasting of Sulfide Minerals | SpringerLink
The rate of reaction decreases toward the center of the ore particle. Hence, the rate of reaction on the inner grains (deeper into the particles) will be determined by an entirely different mechanism from the particle as a whole. ... If nickel sulfide is roasted in a roaster gas containing SO 2 and O 2 in the composition range 2–10% SO 2 and ...
Extraction of Copper and Nickel from Low-Grade Nickel Sulfide Ore …
The roasting process of low-grade nickel sulfide ore with ammonium sulfate and sodium sulfate contains liquid–solid and gas–solid reactions, which can be analyzed with the shrinking core model (SCM).20 The chemical reactions can be expressed as Eqs.
Extraction of ferronickel concentrate from laterite nickel ore …
Yunnan Yuanjiang laterite nickel ore was used in the study. Table 1 lists the main chemical contents of laterite nickel ore. The results showed that the contents of nickel and iron in laterite nickel ores were relatively low at only 0.82 wt% and 9.67 wt%. The impurity components were mainly SiO 2 and MgO, with contents of 37.37 wt% and …
The Impacts of Temperature, Gas Composition and Reaction …
Material. The saprolite nickel ore used as a raw material in this work was obtained from Southeast Sulawesi, Indonesia. The content of oxides in the dried saprolite nickel ore was analyzed using X-ray fluorescence (XRF) (ZSX Primus IV, Rigaku, Tokyo, Japan) and the result is presented in Table I.The result of analysis confirms that the ore …
Phase Transformation in Magnesium-rich Nickel Oxide Ore …
The magnesium-rich nickel oxide ore (w (Ni) =1.09 %, w (MgO)=29.08 %) mixed with 6 % and 8 % anthracite were roasted at different temperatures. ... M. Jiang, et al, "Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during reduction roasting process," International Journal of Mineral Processing, 123 (2013 ...
(PDF) Large- and Particle-Scale Energy Assessment …
Large- and Particle-Scale Energy Assessment of Reduction Roasting of Nickel Laterite Ore for Ferronickel Production via the Rotary Kiln-Electric Furnace Process. Authors: Daniel A....
Effect of Additives on Phase Transformation of Nickel Laterite Ore …
This study investigates the reactions of Na2SO4 and its effects on iron and nickel reduction in the roasting of a high-iron and low-nickel laterite ore through gas composition, X-ray diffraction ...