Iron removal from kaolin by oxalic acid using a novel pre
2023.5.24 This study reports a leaching process along with a novel physical pretreatment technique to remove iron impurities from kaolin using oxalic acid. A detailed
Charlar en LíneaIron Removal from Kaolin Waste Dumps by Chemical
2022.8.25 iron(III) forms present in kaolin as final electron accep-tors, reducing them to iron(II) (Kostka et al., 1999;Luu Ramsay,2003). The current study investigated
Charlar en LíneaOptimal removal of iron impurities from kaolin by
2021.5.1 This study was carried out to remove iron from kaolin using a biological method by two different species of Bacillus sp. and the combination of A. niger isolated
Charlar en LíneaBioleaching of iron from kaolin using Fe(III)-reducing bacteria
2010.4.1 This study evaluated the efficiency of different carbon and nitrogen sources on the removal of iron impurities from kaolin by heterotrophic iron-reducers. The Fe
Charlar en LíneaRefinement of industrial kaolin by removal of iron-bearing impurities ...
2017.6.1 Iron oxide is the most deleterious impurity for whiteness in kaolin. Thereupon, numerous investigations have focused on increasing the whiteness of kaolin
Charlar en LíneaIron removal from kaolin using thiourea dioxide: Effect of
2017.7.1 Iron can be removed by physical separation, e.g. flotation or magnetic separation, or by leaching processes using chemicals such as Na 2 SO 3, Cl 2, HCl, and
Charlar en LíneaRemoval of Fe from Kaolin Using Dissimilatory Fe (III)
2010.8.1 ... Those researchers reported, in a 28-day experiment, 43% and 15% iron elimination in two kaolin samples using two strains of Bacillus cereus. Iron eliminations of
Charlar en LíneaIron removal from kaolin by oxalic acid using a novel pre
technique to remove iron-bearing impurities from kaolin using oxalic acid. A detailed examination of the physical properties of minerals confirmed that almost all of leaching
Charlar en LíneaFactorial experiments for iron removal from kaolin by using
2013.3.1 Iron removal from kaolin by oxalic acid using a novel pre-agitating and high-pressure washing technique Article May 2023 Bijan Taheri View Show abstract
Charlar en LíneaVibrating high gradient magnetic separation for purification of iron ...
2012.1.25 Gravity separation and flotation methods can be used for removing these iron impurities; however, magnetic separation presents the most commonly used method for the purification of non-metallic ores, for instance, for the deferrization of kaolin (Newns and Pascoe, 2002) and for the desulfurization of coal (Jiao et al., 2007), due to its simple ...
Charlar en LíneaEffect of Temperature on Bioleaching of Iron Impurities
In recent decades, biological methods have been used to remove iron impurities from kaolin [7, 9, 13, 14]. Microbial leaching is more efficient compared to chemical
Charlar en LíneaMicrobial refinement of kaolin by iron-reducing bacteria
2002.11.1 The results of the kaolin powder XRF showed 52% iron removal from kaolin by A. niger fungal isolated from pistachio skin after 14 days and 47.7% iron removal after 28 days at a temperature of 25 ...
Charlar en LíneaKaolin: processing, properties and applications - ScienceDirect
1991.9.1 Appl. Clay Sci., 6:87-119. Kaolins are white raw materials, their essential constituent being fine grained white clay, which are amenable for beneficiation that make them ideal for an assortment of industrial applications. Kaolin deposits can be classified into two types, primary (residual) and secondary (sedimentary).
Charlar en LíneaMicrobial refinement of kaolin by iron-reducing bacteria
2002.11.1 Microbial refinement of low-grade kaolin to remove Fe (III) by iron-reducing bacteria was investigated. The removal of Fe (III) impurities could be performed by the indigenous microorganisms in kaolin, but could be enhanced by the inoculation of iron-reducing bacteria. Maltose, sucrose, and glucose could be used as substrates.
Charlar en LíneaRemoval of Fe from kaolin by chemical leaching and bioleaching
2009.12.17 The results of the kaolin powder XRF showed 52% iron removal from kaolin by A. niger fungal isolated from pistachio skin after 14 days and 47.7% iron removal after 28 days at a temperature of 25 ...
Charlar en LíneaComparison of hydrocyclone and flotation ability in reduction of kaolin ...
2018.1.1 Kaolin, known as china clay, is a fine white clay with industrial usage. Kaolinite is the most common mineral in kaolin ores and iron, titanoferrous, and carbonate minerals are the major impurities. Calcium oxide (CaO) in carbonate form (CaCO 3) is the recent critical issue for Zonuz kaolin plant located in the North West of Iran.Therefore, a
Charlar en LíneaIron removal from kaolin by oxalic acid using a novel pre
2023.5.24 This study reports a leaching process along with a novel physical pretreatment technique to remove iron impurities from kaolin using oxalic acid. A detailed examination of the physical properties of the minerals confirmed that almost none of the leaching-resistant iron oxides, specifically hematite, was completely interlocked with the
Charlar en LíneaAdditional investigations on the separation of titanoferrous impurities ...
2008.12.1 Introduction. Kaolins are naturally-occurring layered minerals predominantly containing the mineral kaolinite, Al 2 O 3 2SiO 2 2H 2 O. Impurities normally present in kaolin are quartz, various iron oxides and sulphides, titanoferrous minerals, mica, feldspar, organic matter etc. For most of the industrial applications, kaolin is to be
Charlar en LíneaRemoval of titanium impurities from feldspar ores by new
1998.12.1 The principal impurities in some feldspar ores are titanium and iron, which impart color and in turn degrade the quality of the ore. ... has mainly been used in the removal of colored impurities, mainly anatase, from kaolin type clay minerals [5, 21]. Hydroxamate is reported generally to produce better quality kaolin, with 15-27% higher
Charlar en LíneaIron removal from kaolin by oxalic acid using a novel pre
2023.5.24 This study reports a leaching process along with a novel physical pretreatment technique to remove iron impurities from kaolin using oxalic acid. A detailed examination of the physical properties of the minerals confirmed that almost none of the leaching-resistant iron oxides, specifically hematite, was completely interlocked with the
Charlar en LíneaIron Removal from Kaolin. Comparison between “In Situ
2003.2.1 The results of the kaolin powder XRF showed 52% iron removal from kaolin by A. niger fungal isolated from pistachio skin after 14 days and 47.7% iron removal after 28 days at a temperature of 25 ...
Charlar en Línea12.3: Metals and Ores - Chemistry LibreTexts
The blast furnace is loaded with iron ores, usually hematite Fe 2 O 3 or magnetite Fe 3 O 4, together with coke (coal that has been separately baked to remove volatile components). Air pre-heated to 900 °C is blown through the mixture, in sufficient amount to turn the carbon into carbon monoxide: 2 C + O 2 → 2 CO. This reaction raises the ...
Charlar en LíneaPhysical separation of iron ore: magnetic separation
2022.1.1 9.2.2.1. Iron minerals. Based on the magnetic susceptibility values in Table 9.1, iron minerals can be divided into two groups, namely strong magnetic minerals, that is, magnetite (72.4% Fe), and weakly magnetic minerals, that is, martite (70.0% Fe), hematite (70.0% Fe), specularite (70.0% Fe), limonite (57.14–59.89% Fe), and siderite (48.2%
Charlar en LíneaExtraction, recovery and characterization of aluminum
2022.5.8 The kaolin was collected from local area, Shakiso, which is located 5° 45′N, 38° 55′E, Southern Ethiopia. The process flow sheet of pre-treatment and calcination of kaolin is depicted in Fig. 1. The raw kaolin was soaked in ultrapure water to remove impurities and debris. The kaolin was suspended with water.
Charlar en LíneaIron removal from kaolin. Comparison between “in situ” and
2003.2.1 The filamentous fungus Aspergillus niger can produce large amounts of organic acids (especially oxalic acid) which can be used for the removal of the iron contained as impurity in kaolin. This allows an increase of kaolin whiteness index, a very important factor for its industrial application. Iron leaching may be carried out “in situ” by growing A.
Charlar en LíneaHigh efficiency iron removal from quartz sand using
2012.11.1 Phosphoric acid (H3PO4) was firstly used to remove iron impurities at very low concentrations from quartz sand under ultrasound irradiation with higher efficiency, simpler technology and is less ...
Charlar en LíneaEffect of temperature on bioleaching of iron impurities from kaolin
2023.2.9 Similarly, iron ores such as hematite may contain clays like kaolin as contamination that can cause problems in the operation of blast furnaces [Citation 10]. The first beneficial step in the production of commercially available raw materials is to effectively remove iron oxides from kaolin.
Charlar en LíneaProcessing anatase ores for pigment production
2019.5.1 The sulphidised material was leached with 20–30 wt% H 2 SO 4, or 20 wt% HCl, for up to 3 h under reflux to remove sulphides (e.g. of iron and other impurity elements) formed during the heating. The product was water washed and given a wet magnetic separation with a high field intensity (7000–25,000 G).
Charlar en Línea