The kinetics of the sulfuric acid leaching of altered ilmenite, mechanisms, and process intensification methods were studied. The effect of changing the chemical …
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 …
From the results of the first XRD analysis, the phase contained in Banten ilmenite is ilmenite (FeTiO3). The highest concentration of titanium dioxide (94.189%) was …
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.
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.
Mine tailings deposits are often overlooked by the industry, posing significant environmental challenges due to chemical hazards and inadequate maintenance. Nevertheless, such mineral deposits hold considerable economic potential for processing, and the adoption of innovative technologies may also address critical chemical and …
Leaching solution: The optimised leaching solution was composed by a mixture of 869 kg/t of Br 2, 54 kg/ton of NaBr and 618 kg/t of H 2 SO 4 for the sulphide ore and of 48.5 kg/t of Br 2, 26.5 kg/ton of NaBr and 18.6 kg/t of H 2 SO 4 for the oxidised ore. ®
Pollution of water resources by acid mine drainage (AMD) has been an issue of primary concern in recent decades. This is rooted to the fact that AMD negatively affects the environment and its suitability to foster life. As such, efforts to recover, valorise and beneficiate minerals acquired from AMD treatment process have been ongoing, albeit …
Barite is an inorganic mineral mainly constituted by barium sulfate (BaSO4) which finds applications across a variety of industries. Low quality barite can be beneficiated to meet high-purity requirement. Thus, in this work, we developed an optimum beneficiation process for upgrading barite-bearing ore from Azare in Bauchi State, …
Subsequently, the combustion product is subjected to acid leaching with nitric acid, in which NaCl, MgO and Mg can be readily dissolved, leading to the isolation of FeTi. It has been revealed that FeTi is obtained as the major phase when the acid leaching is carried out at low temperatures (40 °C), where Fe 3 Ti 3 O also exists as a minor phase.
Ilmenite was oxidized with 5vol% O2 in Ar at temperatures of 1173 K or 1223 K and subsequently leached using a diluted H2SO4 solution to dissolve the …
Uranium is widely distributed in the Earth's crust with estimates of its abundance varying between 2 and 4 ppm (Clark et al., 2006, Fleischer, 1955).Uranium in the crust is concentrated in over 200 mineral species that contain uranium as a necessary structural constituent in either the reduced U 4 + or oxidised U 6 + valence state. The …
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 ...
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 …
High-pressure acid leach (HPAL) residue from laterite nickel ore is a potentially valuable resource for ironmaking; however, its efficient utilization is hindered by its high sulfur content. In this study, an effective and straightforward method is proposed for sulfur removal from HPAL residue. The process involves sieving and sodium carbonate …
Pretreatment of ilmenite are required to enhance leaching efficiency of ilmenite. Strong acid leaching is promising in terms of the purity of the produced TiO2, …
DOI: 10.1016/J.HYDROMET.2014.09.016 Corpus ID: 95471349; Beneficiation of titania by sulfuric acid pressure leaching of Panzhihua ilmenite @article{Jia2014BeneficiationOT, title={Beneficiation of titania by sulfuric acid pressure leaching of Panzhihua ilmenite}, author={Linie Jia and Bin Liang and Li L{"u} and Shaojun Yuan and Li-rong Zheng and …
The leaching experimental set-up is shown schematically in Fig. 2.The leaching experiment was carried out in a 500-mL three-necks flask with a condenser attached to one of the necks to condense ...
There are two economic sources of lithium; brines and hard rock ores. The majority of the global lithium production, greater than 60%, is produced from brines while lithium ores accounted for the remaining production (Ebensperger et al., 2005).Table 1 summarises the world's major lithium producers from ores and brines, and the total …
The ferrous content in ilmenite is leached into the acid solution during the acid digestion process through the formation of a soluble phosphate complex, Fe(H 2 PO 4) +, as H 2 PO 4 2− becomes the …
Primary beneficiation was successfully performed prior to dissolution of manganotantalite (sample A) and ferrotantalite (sample C) samples obtained from two different mines in the Naquissupa area, Mozambique. Magnetic separation removed the majority of iron and titanium, whereas H2SO4 leaching …
Abstract. A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried out to provide a better understanding of the mineralogy, leaching process chemistry and effect of operating conditions on nickel recovery, residue properties and scaling.
The utilization of laterite sulfuric acid leach residue has always been a challenge in the metallurgical industry. The current treatment involves deep-sea landfills, which leads to considerable environmental pollution and resource wastage. In this work, an effective method is proposed to recover iron and chromium from sulfuric acid leach residue. The …
Although mining plays a vital role in the economic development of many countries, devastating environmental repercussions are associated with it. The extraction of mineral resources inevitably results in the generation of acid mine drainage (AMD), which entails intricate oxidation interactions that occur under ambient conditions in abandoned …
Table 1 presents basic information about ilmenite properties (rutile properties are also provided for a comparison), and Fig. 2 shows the crystal structure of ilmenite. The theoretical TiO 2 content in ilmenite is 52.7% and the specific gravity of ilmenite is high (ilmenite is considered to be a heavy mineral with the specific gravity of about 5). Fig. 2 …
ABSTRACT Purification of microcrystalline graphite concentrate with alkali-acid leaching process was studied in this paper. The influences of alkali leaching temperature, NaOH concentration, alkali leaching time, HCl consumption, liquid-solid ratio, and acid leaching times were investigated respectively. Final refined products with …
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 …
Feldspar beneficiation produces large amounts of slime waste, which should be efficiently recycled to achieve the economic and environmental benefits. In this study, mechanochemically assisted acid leaching (MAL) was employed to efficiently recycle high-grade concentrate powders, and the physically beneficiated powder from …
A new collector prepared using decyloxy-propyl-amine (DPA) and α-bromododecanoic acid (α-BDDA) at a molar ratio of 1:1 increased the difference in the recovery of spodumene (82.14%) and feldspar (32.48%) significantly [53].The difference in recoveries of spodumene and feldspar was 27.47% while using DPA only, whereas the …
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 …
The optimum conditions for first stage leaching were 70 g/L solid–liquid (S/L) ratio at 40°C for 30 minutes, and 2.0 M sulfuric acid, 100 g/L S/L ratio, 7 g/L starch, at 85°C for 120 minutes ...
