Removal of iron from quartz sands: A study by column leaching using a complete factorial design

Ubaldini, Stefano; Piga, L.; Fornari, P.; Massidda, R.

doi:10.1016/0304-386x(95)00012-6

Cited by 38 publications

(15 citation statements)

References 10 publications

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“…Al is stated as the most difficult element to remove, because it substitutes Si in the crystalline structure. Often, significant purification can be only achieved using HF or concentrated acid mixtures, which is environmentally hazardous and expensive (Du et al, 2011;Li et al, 2010;Lee et al, 2006;Liu et al, 1996;Ubaldini et al, 1996).…”

Section: Technological Aspectsmentioning

confidence: 97%

Quartz sand resources in the Santa Maria Eterna formation, Bahia, Brazil: A geochemical and morphological study

Santos

Fujiwara

Schenkel

et al. 2015

Journal of South American Earth Sciences

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Section: Technological Aspectsmentioning

confidence: 97%

Quartz sand resources in the Santa Maria Eterna formation, Bahia, Brazil: A geochemical and morphological study

Santos

Fujiwara

Schenkel

et al. 2015

Journal of South American Earth Sciences

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“…(3) and time must be linear. Equation (4) reveals that if the surface reaction controls the rate, there must be a linear relation between the left side of equation and time, and the slope of this line is rate constant, k r . The rate constants values, k d and k r calculated from Eqs.…”

Section: Kinetic Analysismentioning

confidence: 99%

“…Considerable efforts have been directed towards the removal of iron contaminants by physical and chemical means (4)(5). Typically, physical and chemical methods such as gravity and magnetic separation, attrition, flotation, and acid or alkaline leaching are used to remove iron from quartz sands (5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%

Tailings Management and Leaching Kinetics in Iron Removal from Kaolin Washing Plants Tailings

Gharabaghi

Rezai

Irannajad

et al. 2010

Separation Science and Technology

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A study has been made of the leaching process to remove iron oxides from quartz presented in kaolin washing plant tailings. The tailings mineralogical constituents were quartz, clay minerals, hematite, and calcite. The leaching rate of Fe 2 O 3 increased with increasing acid concentration, temperature, reaction time, and decreasing pulp solid percent. Shrinking core first-order kinetics model was presented to analyse the data. The activation energy was 23.51 kJ/mol and process was reaction-controlled process (1À(1 À a) 1/3 ¼ 46.52e À23.51/RT t). Using this method, the Fe 2 O 3 amount decreased to 0.03% with a recovery of 89.06%. The results showed that the leaching approach was the best method for the management of these tailings. INTRODUCTIONMining activities are known to be a major source of contamination. Movement of contaminants in and near mining sites is a complex function of the geology, hydrology, geochemistry, pedology, meteorology, microbiology, and mining and mineral processing history (1).Large and medium scale mining activities were intensively developed in several regions of Iran resulting in significant environmental damage from tailings and few scientific studies have evaluated tailings related contamination problems. Recycling or reusing mining tailings for other industry is a good approach for minimizing these problems. Beneficiations of old tailings have become more important in recent years due to the shortage of high quality ore reserves. This situation naturally brings about the processing of tailing to produce marketable product.Zonoz kaolin mine has 40 Mt ore reserves and the samples were taken from its tailings dam contained high amounts of silica (about 90%) and quartz amount in the

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“…When the applicability of physical methods is limited for the purification of ores, including these types of minerals, chemical methods such as acid leaching are used to obtain high purity quartz (Ubaldini et al 1996). Because of chemical methods, the removal of iron to obtain a significant purity quartz ore is considered possible (Toro et al 1993;Bonney 1994;Ubaldini et al 1996;Taxiarchou et al 1997;Vegliò et al 1998;Vegliò , Passariello, and Abbruzzese 1999;Banza, Quindt, and Gock 2006;Arslan and Bayat 2009;Du et al 2011;Zhang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Removal of Iron From Quartz Ore Using Different Acids: A Laboratory-Scale Reactor Study

Tuncuk

Akçıl

2013

Mineral Processing and Extractive Metallurgy Review

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The purification of quartz using chemical processes is extremely important for many industries, including the glass, electronic, detergent, ceramics, paint, refractory, and metallurgy industries, as well as for advanced technology products. The purpose of this work was to investigate the removal of iron as an impurity from quartz ores using a chemical leaching method with different reagents.The iron content of the quartz ore sample was 310 ppm, and the iron was in the form of Fe 2 O 3. In the first step, pre-enrichment studies were conducted based on the particle size, and the Fe 2 O 3 content of the quartz ore was decreased to 88 ppm. A statistical design of the experiments and an ANOVA (analysis of variance) were performed in the second step to determine the main effects and interactions of the researched factors, which were the concentration of the leaching reagent (H 2 SO 4 , HCl, H 3 PO 4 , HClO 4 , and NTA [Nitrilotriacetic acid]), solid/liquid ratio, leaching temperature, and leaching time. The highest Fe 2 O 3 removal was 86.6%, and a 11.8 ppm Fe 2 O 3 content quartz product with a whiteness index (WI) value of 90.6 was obtained after 120 min of treatment at 90 C with a 10% S/L ratio and 1 M H 2 SO 4 .

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Removal of iron from quartz sands: A study by column leaching using a complete factorial design

Cited by 38 publications

References 10 publications

Quartz sand resources in the Santa Maria Eterna formation, Bahia, Brazil: A geochemical and morphological study

Quartz sand resources in the Santa Maria Eterna formation, Bahia, Brazil: A geochemical and morphological study

Tailings Management and Leaching Kinetics in Iron Removal from Kaolin Washing Plants Tailings

Removal of Iron From Quartz Ore Using Different Acids: A Laboratory-Scale Reactor Study

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