Sustainable Process for Preparation of Ti rich Alloy from Acidic TiO2 Sludge

IF 1.6 4区材料科学 Q2 Materials Science

Transactions of The Indian Institute of Metals Pub Date : 2024-07-31 DOI:10.1007/s12666-024-03404-x

Sreedevi Thikkandy Edathil, Akhil Nair Anil, Venkatesan Jayapalan, Jayasankar Kalidoss

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Abstract

Titanium oxide pigment industries produce a large amount of undissolved particles called sludge during the sulfate process of ilmenite. The sludge mainly constituted 48% TiO₂, 15% SiO₂, 11% Fe₂O₃, 4.5% SO₃, and 2% Al₂O₃. Zirconium, vanadium, magnesium, and calcium oxides are also in small amounts. The presence of sulfur induces an acidic nature to the sludge and reduces its further utilization. Using a simultaneous process to reduce sulfur content and extract important metals is crucial. The paper describes use of acidic sludge to extract titanium to prepare titanium rich alloy. The method involves initial neutralization and reduction roasting followed by magnetic separation. The separated magnetic part was then utilized for aluminothermic reduction by smelting, resulting in titanium-rich alloy. Analytical techniques such as XRD, SEM–EDS and Thermal analysis were conducted during the studies. Titanium-rich alloys having a composition of ~ 51.8% Ti, 22.4% Al, 9.5% Si, and 16.3% Fe were achieved.

Graphical Abstract

Abstract Image

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利用酸性二氧化钛污泥制备富钛合金的可持续工艺

氧化钛颜料工业在硫酸法提炼钛铁矿的过程中会产生大量未溶解的颗粒，称为污泥。这些污泥主要由 48% 的 TiO2、15% 的 SiO2、11% 的 Fe2O3、4.5% 的 SO3 和 2% 的 Al2O3 组成。此外，还含有少量的锆、钒、镁和钙氧化物。硫的存在使污泥呈酸性，降低了污泥的进一步利用率。因此，采用一种同时降低硫含量和提取重要金属的工艺至关重要。本文介绍了利用酸性污泥提取钛以制备富钛合金的方法。该方法包括初始中和和还原焙烧，然后进行磁分离。分离出的磁性部分通过熔炼进行铝热还原，从而得到富钛合金。研究期间采用了 XRD、SEM-EDS 和热分析等分析技术。富钛合金的成分为：钛（Ti）51.8%、铝（Al）22.4%、硅（Si）9.5% 和铁（Fe）16.3%。

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来源期刊

Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

发文量

期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.