The beneficiation of titania (TiO 2) by sulfuric acid (H 2 SO 4) pressure leaching of Panzhihua ilmenite was investigated. The reaction temperature, H 2 SO 4 concentration, and concentration of ferrous ions (Fe 2 +) had significant effects on the enrichment of TiO 2.With increasing reaction temperatures, the dissolution of iron from ilmenite was enhanced, while the …
WhatsApp: +86 18221755073
Frequently optimizations of chemical processes are presented in terms of the maximization of fractional conversion, but the primary concern when implementing a process is much more likely to be the economic viability. These are distinct optima that tend to occur at very different points. It was the purpose of this paper to integrate leaching experimental data with cost analysis to …
WhatsApp: +86 18221755073
Strong acid leaching is promising in terms of the purity of the produced TiO2, low energy consumption and waste management. The effect of several factors on the acid leaching kinetics in reported processes was reviewed. Temperature, time and acid concentration significantly affect the dissolution of titanium and impurities in ilmenite.
WhatsApp: +86 18221755073
MS is usually applied in combination with an adjunct process such as GC (Alabi et al. 2016;Berhe et al. 2017;Nete et al. 2014) or aqueous leaching (Nete et al. 2014) for proper beneficiation ...
WhatsApp: +86 18221755073
The effect of leaching temperature upon ilmenite dissolution was studied in the range of 50 to 90 °C, while the other leaching conditions were fixed at 4 M acid in 1:5 w/v solid/liquid ratio for 4 h. The results obtained are shown in Fig. 2. It indicates that the amount of iron leached is directly correlated with temperature up to 90 °C.
WhatsApp: +86 18221755073
Structural changes of mechanically activated titanaugite were investigated systematically using X-ray diffraction, particle size analysis, and scanning electron microscopy. The hydrochloric acid leaching behavior of mechanically activated titanaugite and ilmenite single minerals and their mixtures also was studied. The results show that with increasing milling …
WhatsApp: +86 18221755073
Beneficiation of anatase ores to 65 wt% TiO 2 3.1.1. Mineral dressing of anatase ores. Chao ... Analytical data in Table 4 for the concentrate and leached products indicate that acid leaching before the alkali leach removed appreciable amounts of aluminium, phosphorus and calcium, and some of the rare earths. When the caustic leach was applied ...
WhatsApp: +86 18221755073
2 from Panzhihua ilmenite through sulfuric acid pressure leaching was investigated. Specifically, the effect of reaction temperature, H 2SO 4 concentration, acid/ore ratio, leaching time, and the concentration of Fe2+ on the pressure leaching process were systematically examined. The resulting Ti-rich materials were characterized, and the reaction
WhatsApp: +86 18221755073
This study investigated the recovery of nickel from tailings (0.2% Ni) obtained in a chromite beneficiation plant using H2SO4 leaching followed by oxalic acid precipitation. The tailings were characterized using mineral liberation analysis. Ni was found as Fe-Ni, Fe-Ni-Co sulfide minerals, which were encapsulated in serpentine, olivine, pyroxene and clinochlore. …
WhatsApp: +86 18221755073
Maximum magnesium extraction yield was determined to be nearly 98% for both acids under optimum leaching parameters which leaching temperature was 85°C, solid ratio was 20wt.%, leaching time was ...
WhatsApp: +86 18221755073
2.2.1. Acid Leaching Dephosphorization The raw ore was ground to a specific particle size for the sulfuric acid leaching experiments. This procedure was accomplished using the XMQ 240 690 ball ...
WhatsApp: +86 18221755073
The demand for rare earth elements for everyday technology and applications has initiated much research into the extraction and recovery of these rare earth elements. An otherwise unknown group of minerals, eudialyte is a zircon silicate consisting of rare earth oxides (REO), contained in a unique mineral structure and represented by a complex chemical …
WhatsApp: +86 18221755073
The production of synthetic rutile (89% TiO 2) from Rosetta ilmenite concentrate has been studied. High acid concentration (high ilmenite/acid molar ratio) and reduction with …
WhatsApp: +86 18221755073
Sulfuric acid causes less corrosion and can extract titanium from low grade titanium sources, although it generates a high amount of solid and acid waste. Leaching in weak acids like citric acid requires low acid concentration. This process extracts more titanium than …
WhatsApp: +86 18221755073
Semantic Scholar extracted view of "Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept" by V. Akinwekomi et al. ... Techno-Economic Analysis of the Reclamation of Drinking Water and Valuable Minerals from Acid Mine Drainage.
WhatsApp: +86 18221755073
The present scenario has urged the necessity to beneficiate and extract lithium from the available resources judiciously. Pegmatites constitute the second major economic resource of lithium, after brines, accounting for about 25% of global production [14].The lithium-bearing minerals, hosted by the pegmatite rocks, include spodumene, lepidolite, petalite, amblygonite, …
WhatsApp: +86 18221755073
Organic acids are selective leaching agents for the beneficiation of low grade phosphate rock, depending on the reaction conditions, nature and size of the particles.Although organic acids are promising leaching agents, there are some restrictions in the selection of the organic acids and this beneficiation method has some drawbacks that should ...
WhatsApp: +86 18221755073
wide applications. Transformation of ilmenite to dierent titanium based materials by strong and weak acid, and base digestion, is discussed. Eects of temperature, concentration of acid/base, reaction time on dissolution of ilmenite are extensively reviewed. Characterization of the starting materials, intermediates and the products by x-ray ...
WhatsApp: +86 18221755073
Due to the demand for rare earth elements for everyday technology and applications, there has been much research initiation into the extraction and recovery of rare earth elements. An otherwise unknown mineral, eudialyte is a zircon silicate consisting of rare earth oxides, specifically the heavy REO yttrium (III), with only trace amounts of thorium and …
WhatsApp: +86 18221755073
3. Analysis methods and process chemistry3.1.. Analysis methodsIn the most of leaching investigations, the phosphate rock samples were crushed and then sieved to collect various size fractions for analysis of combined water and organic matter, P 2 O 5 content, CO 2 content or loss on ignition (LOI) and acid insoluble residue (AIR). In the leaching …
WhatsApp: +86 18221755073
The water leaching filter cake was put into a three-neck flask for the sulfuric acid leaching process, and dilute sulfuric acid was used as leaching agent. After leaching was completed, the slurry was immediately vacuum filtered. The dilute leachate was sent to ICP analysis to calculate the leaching rate of elemental zinc.
WhatsApp: +86 18221755073
Pressure acid leaching has been applied to the Caron process to reduce high-energy consuming phases in direct ore leaching. Direct leaching eliminates the need for drying and reduction steps, which then leads to energy savings (Buyukakinci, 2008).The acceptable nickel content in this method is 1–5% (Dalvi et al., 2004).Also, the crushed ore is dissolved directly with sulfuric …
WhatsApp: +86 18221755073
This research attempts to explain these aims with a review of recent articles on ilmenite leaching, which means accelerating iron extraction and Ti dissolving to obtain a high content of TiO 2 in the final process with low …
WhatsApp: +86 18221755073
Abstract The article presents the results of generalization of known information on various methods of enrichment of low-grade phosphate raw materials in the world. Based on the review of literature materials, scientists propose several methods of enrichment: mechanical, calcination at high temperatures, flotation, chemical enrichment with various acids and salts. …
WhatsApp: +86 18221755073
Contribute to dinglei2022/en development by creating an account on GitHub.
WhatsApp: +86 18221755073
Technology Management and Economics Chalmers University of Technology 412 96 Gothenburg Sweden Telephone+ 46 (0)31-772 1000 Cover: Raw ilmenite ore. (Lavinsky, n.d.) ... HCl Hydrochloric acid H2SO4 Sulphuric acid LCA Life-cycle analysis NH4 Cl Ammonium chloride O2 Oxygen OCAC Oxygen carrier aided combustion S Sulphur TiO2 Titanium dioxide
WhatsApp: +86 18221755073
pressure acid leaching (HPAL),5,6 atmospheric leaching (AL),7 heap leaching (HL)8,9 and bioleach-ing.10 In these processes, inorganic acids (HCl,11 H 2SO 4 12,13), organic acids or their mixtures (ascor-bic acid:H 2SO 4, 14 citric acid15) have been tested to determine the leaching mechanism for Ni extraction from different resources ...
WhatsApp: +86 18221755073
This study investigated the recovery of nickel from tailings (0.2% Ni) obtained in a chromite beneficiation plant using H2SO4 leaching followed by oxalic acid precipitation.
WhatsApp: +86 18221755073
Roasting of ilmenite with ZnO or ZnS converts acid resistant FeTiO 3 to more reactive Fe 2 O 3 and Zn 2 TiO 4, resulting in enhanced leaching. Roasting FeTiO 3 with ZnS …
WhatsApp: +86 18221755073
The efect of sulfuric acid concentration on leaching of ilmenite has been studied in the range of 10–50 wt%. Percentage Fe extraction was found to increase with increasing acid …
WhatsApp: +86 18221755073
0086-21-58386256
Our office time Mon - Sat 10.00AM - 7.00PM Sunday CLOSED
Copyright © 2024.Con All rights reserved.sitemap