Recovery of high-quality iron phosphate from acid-leaching …
These optimized conditions ensured the maximum efficiency and effectiveness of the iron-leaching process. Furthermore, the product layer diffusion model, the reaction kinetic analysis and thermodynamic analysis provide a strong theoretical support for this technology. Through this work, the utilization efficiency of laterite nickel ore can be ...
(PDF) Iron removal from red clay using oxalic acid leaching …
The leaching process, involving the application of oxalic acid, effectively dissolves these iron oxides, leading to the disintegration of larger agglomerates and resulting in a ner and more ...
Leaching process of phosphorus and iron from steelmaking …
Download Citation | Leaching process of phosphorus and iron from steelmaking slag into malic acid solution | In order to remove phosphorus element from steelmaking slag and decrease iron loss ...
Leaching and Recovery of Metals
Leaching processes are classified based on the method used for the leaching of metals, i.e. hydrometallurgy (chemicals) or bio-hydrometallurgy (microbial mediated leaching). …
Ammonia leaching process for selective extraction of nickel …
In the process of ammonia leaching, compared with Co(OH) 2, Co(OH) 3 is difficult to form coordination compounds with ammonia in the solution, resulting in less leaching of cobalt. As a result, a reducing agent can be added to the ammonia leaching process to convert trivalent cobalt to divalent cobalt, strengthening the leaching of cobalt.
Metallurgy
Leaching is carried out by two main methods: simple leaching at ambient temperature and atmospheric pressure; and pressure leaching, in which pressure and …
Recycling of NdFeB magnets employing oxidation, selective leaching…
It was reported that the leaching kinetics followed a shrinking core model. 25 Liu et al. studied the selective separation of REEs from iron by a selective pressure leaching process. In this study, REEs and Boron were effectively separated from the iron, especially with the addition of NaNO 3 promoter to decrease the level of iron in the ...
Selective extraction of scandium from bauxite residue (red …
The principle of the sulfation roasting-water leaching is that metal sulfates have different thermal decomposition temperatures to achieve the conversion of other metal sulfates to oxides, maintaining scandium sulfate (Sc 2 (SO 4) 3) in its undecomposed state [27].During the water leaching process, the soluble Sc 2 (SO 4) 3 could be dissolved in solutions. . Using …
Iron leaching from sludge incineration ash for preparation
Sludge incineration ash (SIA), a by-product of sludge incineration, is a powdery material riches in Fe2O3, SiO2, CaO, Al2O3, MgO and P2O5. Extraction of Fe from SIA by acid leaching to prepare polymeric ferric chloride flocculant for water purification is a green and sustainable method to recycle SIA. In this study, the optimal synthesis conditions of SPFC …
Leaching of iron from copper tailings by sulfuric …
Traditional leaching and recovery technology for copper tailing focuses on copper but neglects the leaching of iron. With the increase in applications and demands of iron-containing materials for environment, understanding the leaching …
A critical review on metallurgical recovery of iron from iron …
In treating IOTs, acid leaching, acid leaching-extraction, and acid leaching-precipitation processes are commonly used to recover iron, purify quartz, or prepare …
Iron leaching from nonrefractory grade bauxite: …
Kinetics of the removing process were calculated by two models, and the results showed that the leaching process was controlled by the mixed shrinking core model, which was affected by both the ...
Leaching of iron from copper tailings by sulfuric acid: …
Iron leaching rapidly proceeded in the first 120 min, and then proceeded more slowly. The leaching of iron was 49.53% at 20 °C, and increased to 69.18% at 60 °C. ... During the leaching process, most of Fe 2 SiO 4 gradually disappeared, while peak intensity related to Fe 3 O 4 and CaFeSi 2 O 6 were relatively stable.
CYCLIC LEACHING PROCESS EMPLOYING IRON OXIDIZING …
It is demonstrated that microbial bioleaching continues to develop actively, despite various problems in its industrial application, and new trends were formed during the last decades with an emphasis on the phylogeny of leaching microbiota and on genomes of the leaching microorganisms.
Optimizing iron separation and recycling from iron tailings: …
Based on the results of 3.2 The role of alkaline leaching in desilication and iron recovery efficiency, 3.3 Characterization of samples in the alkaline leaching process, chemical reactions occurring during the magnetizing roasting and alkaline leaching of iron tailings were presented in Fig. 8 a and b, while the synergistic mechanism of the two ...
Separation of silicon and iron in copper slag by
Approximately 2.0–3.0 t of copper slag (CS) containing 35%–45% iron is generated for every ton of copper produced during the pyrometallurgical process from copper concentrate. Therefore, the recovery of iron from CS utilizes a valuable metal and alleviates the environmental stress caused by stockpile. In this paper, a new method has been developed to realize the …
Leaching of Metals from e-Waste: From Its Thermodynamic …
The aim of this study is to design and develop an efficient leaching process based on a fundamental and theoretical thermodynamic analysis and the optimization of the operation parameters via the response surface methodology (RSM). Using this methodology, the design of a leaching process for the recovery of copper, silver, and lead from highly metal-concentrated …
Leaching Iron: Methods, Applications and Environmental …
Leaching, a process where soluble substances are removed from a solid by washing with a solvent is a key method used to extract iron from ores and other materials. This article delves into the methods of leaching iron, its applications and the environmental implications …
Leaching Iron: Methods, Applications and …
Leaching, a process where soluble substances are removed from a solid by washing with a solvent is a key method used to extract iron from ores and other materials. This article delves ... Iron leaching involves the extraction of iron from its ore or waste material through the use of
Production of a ferric chloride coagulant by leaching an iron …
The solid phase remaining from the leaching process is a fine powder reached in silica, with potential use in other industrial segments. ... The leaching of the iron ore tailing (IOT) carried out with a 10.8 mol L-1 of HCl at a temperature of 80° for 120 min resulted in a 94% solubilization efficiency of iron. The leachate presented 11% Fe in ...
Research on Behavior of Iron in the Zinc Sulfide …
Dissolved iron exerts significant effects on mineral leaching, impurity removal, and solution purification in the zinc hydrometallurgy process. To date, iron oxidation and migration behaviors are yet to be fully understood and …
Sulfur Removal and Iron Recovery from High-Pressure Acid Leaching …
The process involves sieving and sodium carbonate leaching, enabling significant sulfur reduction from 5.12 to 0.81% and simultaneous enrichment of iron content from 47.12 to 55.27%. The sulfur content in the treated HPAL residue falls below the permissible level for the ironmaking industry, rendering it suitable for use as a low-grade iron ore.
Revealing role of oxidation in recycling spent lithium iron …
The efficient recycling of spent lithium iron phosphate (LiFePO 4, also referred to as LFP) should convert Fe (II) to Fe (III), which is key to the extraction of Li and separation of Fe and is not well understood.Herein, we systematically study the oxidation of LiFePO 4 in the air and in the solution containing oxidants such as H 2 O 2 and the effect of oxidation on the leaching …
Synergetic recovery of rutile and preparation of iron …
A keen observation reveals the pronounced efficacy of the hybrid acid leaching process in the extraction of iron. Specifically, from the TET with an initial high iron (Fe) content of 59.73 %, the Fe concentration significantly decreases to 15.68 % post-mixed acid leaching. This dramatic reduction underscores the remarkable efficiency of the ...
Review on comprehensive utilization of nickel laterite ore
The nitric acid pressure leaching process fully recovers iron, magnesium, and aluminum, achieving a high metal recovery rate with low treatment costs and minimal environmental impact ... Before the leaching process of nickel laterite ore, the ore undergoes a high-temperature pre-treatment, during which certain additives (such as the reduction ...
The Leaching Kinetics of Iron from Titanium Gypsum in a …
The kinetic analysis indicated that the leaching process of iron from TiG was controlled by the reaction product layer from 0–20 min, while the leaching process of iron from TiG was controlled by internal diffusion from 20–90 min. The apparent activation energy of the leaching reactions was 33.91 kJ/mol and 16.59 kJ/mol, respectively.
Leaching behavior of metals from iron tailings under varying …
Iron tailings usually contain As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn, some of which are highly toxic and carcinogenic. Leaching is the process of extracting soluble substances from solids using leaching agents (i.e., water, acid, alkali and salt solutions), and it is a crucial hydrometallurgical method for metals extraction from various solids (Ye et al., 2017; Zhang et …
An Integrated Sulfation-Roasting-Leaching Process for …
Therefore, rhomboclase and iron sulfate, generated from the limonitic laterite ore, can be used as a source of SO 3 in the sulfation-roasting-leaching process of the saprolitic laterite ore. On this basis, a prospective process for the extraction of Ni and Co via the co-roasting of limonitic and saprolitic laterite ore was proposed.
High-efficiency leaching process for selective leaching of …
The leaching rates of lithium and iron were 99.83 % and 0.34 %, respectively, at the optimal leaching conditions of 4 vol% 30 wt% H 2 O 2, 0.08 mol/L K 2 S 2 O 7, 25℃, 5 min, and a solid–liquid ratio of 20 g/L. Meanwhile, the mechanism of the leaching process was explored by thermodynamic, XRD, XPS, FTIR, and SEM analyses.
Establishing a green biodesulfurization process for iron ore
During this period, we observed minor iron leaching, yielding a low concentration of ∼100 (mg L −1). Initially, ferrous iron species were detected in the first 5 days of culturing. ... Mounting evidence supports the notion that the efficient bacterial sulfur oxidation activities in the leaching process require the development of a complex ...