A new process for comprehensive utilization of complex titania ore

Yuan, Zhangfu; Wang, Xiaoqiang; Xu, Cong; Wen-bing, LI; Kwauk, Mooson

doi:10.1016/j.mineng.2005.10.002

Cited by 65 publications

(26 citation statements)

References 4 publications

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“…The above processes are, either environmentally unfriendly, costly, generate high levels of waste or recycle, are unable to process low grade ores, as well as, ores such as anatase, sphene, and perovskite (Bulatovic, 1999;Cole, 2001;Nielsen and Chang, 1996;Van Dyk et al, 2004;Yuan et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Titania recovery from low-grade titanoferrous minerals

2011

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In this study a novel process for extraction of titanium valuables from its minerals is presented. The process entails roasting of titanium ore with alkaline metal salt, hydrolysing fused cake and dissolution in acid. Optimum conditions were found to be 1 hr fusion at 850 °C, using 2:1 mole ratio, NaOH:FeTiO 4 , irrespective of the particle size interval used in this work. It was found that under these conditions » 80% of titanium was recovered. Na 0.75 Fe 0.75 Ti 0.25 O 2 , NaFeTiO 4 and Na 2 Fe 2 Ti 3 O 10 were the dominant phases at this temperature. The presence of these phases is viewed as beneficial to the economics of the process, it consumes less NaOH. Fusions conducted at 550 °C or below produced chiefly binary phases, Na 2 TiO 3 and NaFeO 4 , reducing process economy. Optimum leaching conditions were S/L= 0.26, leaching at 75 ºC, for 15 min. 85% of NaOH were recovered, under these conditions. Leaching obeys shrinking core mechanism model. IntroductionTitania (TiO 2 ) is a white pigment used in paints, paper, plastics, cosmetics and coatings. Its wide application is due to its higher opacity and covering power. There are two commercial methods of TiO 2 production, the chloride and the sulphate process. In the chloride process titanium mineral is converted into TiCl 4 which is subsequently oxidized at high temperatures.In the sulphate process the ore is converted into sulphate solution and then thermally hydrolysed to hydrous titanium. The later is calcined to produce the pigment (Braun et al, 1992;Nielsen and Chang, 1996;Xue et al, 2009).According to Pong et al (1995) a commercially viable process has to be environmentally benign, to generate a minimum waste, be able to use all grades of ores and be economically favourable. The above processes are, either environmentally unfriendly, costly, generate high levels of waste or recycle, are unable to process low grade ores, as well as, ores such as anatase, sphene, and perovskite (Bulatovic, 1999;Cole, 2001;Nielsen and Chang, 1996;Van Dyk et al, 2004;Yuan et al, 2005).Generally low grade titanoferrous ores are submitted to slagging process. The slagging process however faces uncertain future due to its higher energy consumption and green house gases emission. Additionally slagging is unable to treat radioactive ores, since the radionuclides remain in the solid solution during slagging process. With increasingly restringent environmental policies on radionuclides content, further treatment has to be conducted to reduce it. This will result in additional production costs (Nielsen and Chang, 1996; Habashi, 1997;Doan, 2003; Jha et al, 2005;Lahiri et al, 2006;Lahiri and Jha, 2007

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Section: Introductionmentioning

confidence: 99%

Titania recovery from low-grade titanoferrous minerals

2011

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“…Instability of phases occured as mentioned by Kukura et al (1979). Regarding the holding time, the work of Yuan et al (2006) confirmed that changes do not occur in a 90 minute holding time. As mentioned by Soedarsono et al (2014a) the ratio of ore to coal is important for sustainability of the reduction process.…”

Section: Particle Sizementioning

confidence: 75%

Influence of Coal and Reduction Parameters on Lateritic Limonite Type Rock in Producing Nugget Iron for Thin-wall Ductile Iron Material

Soedarsono¹,

Kawigraha²,

Sulamet-Ariobimo³

et al. 2017

dtetr

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Finding iron sources from other ores is important because of the depletion of iron ore. One such source is lateritic rocks. Lateritic rocks are a nickel source, but owing to their high iron content, they are promoted as an iron source. This research was conducted to investigate the effect of reduction parameters on lateritic rock behaviour. Lateritic limonite rock is used. Process parameters include particle size, temperature, holding time and ratio of carbon. Particle size is varied in 120, 170, 200 and 270 meshes. Temperatures are 600, 800, 1000, 1100 and 1200 o C. Holding times used are 60 and 90 minutes. The variable ratios of carbon to ore are 1:1, 2:1, and 3:1. The results show that among all the parameters, temperature has a significant effect and holding time displays the weakest effect.

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“…By the beneficiation process of the ore, titanomagetite concentrates and ilmenite concentrates are produced. 1,2) The titanomagnetite concentrates are used as the main materials for the blast furnace process in Panzhihua area now. In this process, most of the iron and partly of the vanadium can be reduced into the hot metal; however, almost all of the titanium remains in the slag, forming the high titanium bearing slag, which contains about 21%-25% of TiO 2 , and emission in every year is more than 3 million tons.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic Reduction of Vanadium-Titanium Magnetite in Molten NaOH

et al. 2018

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The carbothermic reduction experiments were carried out for vanadium-titanium magnetite in alkaline molten in argon atmosphere at high temperatures. The effects of reduction temperature, carbon content and addition agent on the formation of pig iron containing vanadium were studied by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD patterns of reduced slags results showed that Fe phase disappeared and the main phase of the reduced sample were Na 16 Ti 10 O 28 , CaTiO 3 , and Na 1.66 AlSiO 4.33 when the reduction temperature was more than 1 473 K when cooled in the air. The SEM pictures show that most of V exists in the crystalline phase, such as Na 16 Ti 10 O 28 , NaAlSiO 4 and CaTiO 3 , when quenched in air slowly; and the vanadium is dispersed in the slag phase when cooled by water quickly. Furthermore, the effects of additive NaOH on the reduction were also studied, results show that NaOH could enhance the separation of iron and slag, promote the transformation of vanadium and titanium and inhibit the vanadium enrichment in metal phase.

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A new process for comprehensive utilization of complex titania ore

Cited by 65 publications

References 4 publications

Titania recovery from low-grade titanoferrous minerals

Titania recovery from low-grade titanoferrous minerals

Influence of Coal and Reduction Parameters on Lateritic Limonite Type Rock in Producing Nugget Iron for Thin-wall Ductile Iron Material

Carbothermic Reduction of Vanadium-Titanium Magnetite in Molten NaOH

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