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Removal of iron and titanium contaminants from Jordanian Kaolins by using chemical leaching M. Gougazeha,b aGeology Department, Taibah University, Madinah, Saudi Arabia; bNatural Resources and Chemical Engineering Department, Tafila Technical University, Tafila, Jordan ABSTRACT
Some kaolins from Georgia, USA, also present the same type of impurities like iron associated with rutile and anatase minerals. To attend the specifications required by the paper industry, different processes have been proposed for removing kaolin impurities. Sodium hydrosulphite has been used for soluble iron removal during the dewatering step.
Bleaching of kaolins and clays by chlorination of iron and titanium. The use of chlorination for iron and titanium removal from different clay and kaolin minerals, .
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 % iron removal after 28 days at a temperature of 25 ...
flocculation to remove iron from kaolin how are impurities of kaolinite removed remove iron from kaolin by selective flocculation. purification of kaolin by selective flocculation CETEM Centro de Key words kaolin, selective flocculation, kaolin purification, paper industry, kaolin Sodium hydrosulphite has been used for soluble iron removal during the.
Conclusions Two series of bacterial ironreduction experiments have shown that all tested Shewanella sp. bacterial strains were able to leach iron impurities from industrial kaolins and that among the tested strains, S. putrefaciens CIP8040 is the most efficient in terms of both extent of Fe removal and improvement in the colour properties of ...
Abstract. LongYan kaolin has a large Fe content which affects the coloring. Bioleaching treatments to remove Fe impurities were conducted here using indigenous dissimilatory Fe(III)reducing bacteria.
Thus, the use of IRB may be of industrial interest for the removal of iron impurities from kaolins. In the present study, the Fe(III) removal efficiency from a kaolin from SW England has been evaluated using different Shewanella IRB species (S. alga BrY, S. oneidensis MR1, S. putrefaciens CN32, and S. putrefaciens CIP 8040). The microbial ...
tion of kaolins, as an industrial raw material. The deep colouration of kaolins by ironoxide impurities renders them less suitable as a white coloured filler, a pigment material for paint, paper, plastics, rubber, adhesives and putties [3, 4, 9 13]. Hence, there is the need to improve the whiteness by removal of the iron .
remove iron from kaolin using selective flocculation. removal of iron clay kaolin galgotiasbschoolin removal of iron clay kaolin As a leading global manufacturer of crushing, grinding and mining equipments,, flocculation to remove iron from kaolin. More Info; remove iron .
A process for biological removal of iron from quartz sands, kaolins and clays was developed as leaching at 90 oC with lixiviant produced as a result of the cultivation of acidproducing heterotrophic microorganisms, mainly strains of Aspergillus niger [3]. The iron content of different kaolins .
The leaching tests improved the brightness from 56% to 86%. The corresponding ironoxide removal was in the order of 94%. Removal of 94% iron gives a product containing % Fe 2 O 3, which is fit for industrial applications such as fine ceramics and as a filler .
Apr 01, 2015· Read "Biological beneficiation of kaolin: A review on iron removal, Applied Clay Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
mm fraction. Kaolinite and quartz maybe separated by sieving. However, the iron content in the mm − fraction is %, implying that the ironbearing minerals aremixed with kaolinite. Iron removal is required for the kaolinite separated from the tailings (Svoboda, J. and Fujita, T., 2003, Santos, et al. 2012, Chandrasekhar and Ramaswamy ...
The efficiency of iron removal in the biochemical method of processing kaolin depends on the particle size, magnetic properties, and structural organization of the iron minerals (weakly crystallized and crystalline magnetically ordered).
In a shake flask, bioleaching of kaolin by Aspergillus niger resulted in removal of % of the total Fe, suggesting that this strain is effective at removing Fe impurities from kaolin. The removal efficiency generally decreased with increased pulp density.
A process was developed for the removal of iron at high temperature (90 jC) from quartz sands, kaolins and clays using the culture filtrates of acid producing fungi, mainly Aspergillus niger (Groudev, 1987). Recently, a bacterial consortium occurring in kaolins and kaolincontaining rocks was utilized for removing iron from such materials.
Beside the recovery of valuable metals from nonsulfide minerals, heterotrophic microorganisms can also be used for upgrading mineral raw materials by removal of impurities. Quartz sands, kaolins and clays often contain iron oxides which lower the quality of these mineral raw materials.
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 % iron removal after 28 days at a temperature of 25 ...
The acids most commonly used in traditional iron removal from kaolin in industrial scale are sulfuric acid and phosphoric [14]. Other authors reported experimental studies on iron removal which employs organic acids as oxalic acid and ascorbic [5, 6]. However it is considered that the oxalic acid ...
A chemical process is described for removing ferric iron present in submarginal quantities in concentrates of kaolin, quartz, titanium minerals, ceramic minerals for glass, paper and electronics use and other materials of industrial interest by which ferric iron is reduced to ferrous iron using acid solutions, possibly in the presence of low concentrations of sugars containing 5 or more carbon ...
A process for biological removal of iron from quartz sands, kaolins and clays was developed as leaching at 90 oC with lixiviant produced as a result of the cultivation of acidproducing heterotrophic microorganisms, mainly strains of Aspergillus niger [3]. The iron content of different kaolins .
In the present study, to investigate the effects of acidic leaching on the iron removal from kaolin clay supplied by CamSer Madencilik, the 2 4 full factorial design of experiments and analysis of variance (ANOVA) were performed. The aim of the initial phase of research was to determine the effects of the main and interaction factors which can potentially influence the iron removal process.
The Potential for Biomining PGMs and REEs. Biomining of primary ores has mainly been practiced for copper, nickel and gold using bioheap leaching or biooxidation in stirred tank bioreactors which are technologies that have been described in details [].The microbial processes that power current industrial biomining are the autotrophic utilization of sulfide and ferrous iron minerals [].
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