Reclaim of Synthetic Rutile Fines Produced In Ilmenite Beneficiation Process by Agglomeration

Q3 Engineering

International Journal of Computational Materials Science and Surface Engineering Pub Date : 2022-01-01 DOI:10.52687/2348-8956/913

G. Lijith, I. K. Shaju, P. K. Manikuttan

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引用次数: 0

Abstract

The synthetic rutile is used as feed stock material for producing rutile TiO2 under chloride route method. The synthetic rutile suitable for chlorination process under fluidized bed reactor was having a specification of TiO2 content above 90 %, silica content less than 2 %, and particle above 100 micron in size. One of the steps in the up-gradation process of ilmenite was leaching with mineral acids. The leach liquor obtained after leaching process is called spent acid. During leaching process, aberration leads to produce ultra fine particles of synthetic rutile which is found suspended in spent acid. A few amount of TiO2 was digested in acid to form hydrated TiO2. The spent acid contains both these ultra fine particles and hydrated TiO2 particles which were allowed to settled and removed from the system as TiO2 sludge. In addition to TiO2 sludge, a small quantity (0.5 0.7 %) of synthetic rutile having particle size less than 100 micron (required specification) were also generated, which is removed by using cyclone and stored as synthetic rutile fines. The quantity of synthetic rutile fines and TiO2 sludge produced are 1.0 MT and 3.0 MT respectively in a production plant having the synthetic rutile production capacity of 140 MT/day. The present invention aims to recover and re-use the synthetic rutile fines and TiO2 sludge generated in the ilmenite beneficiation plant by agglomeration technique. ARTICLE HISTORY Received 13-12-2021 Revised 18-12-2021 Accepted 22-12-2021 Published 12-01-2022

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钛铁矿选矿过程中合成金红石细粒的团聚回收

以合成的金红石为原料，采用氯化法生产金红石型TiO2。适于流化床反应器氯化工艺的合成金红石，其规格为TiO2含量≥90%，二氧化硅含量≤2%，粒径≥100微米。钛铁矿提品位的一个重要步骤是矿酸浸出。浸出后得到的浸出液称为废酸。在浸出过程中，畸变导致合成金红石的超细颗粒悬浮在废酸中。少量TiO2在酸中被消化形成水合TiO2。废酸含有超细颗粒和水合TiO2颗粒，这些颗粒被允许沉淀并作为TiO2污泥从系统中去除。除了TiO2污泥外，还生成了少量(0.5 - 0.7%)粒径小于100微米(要求规格)的合成金红石，通过旋风分离器将其除去并作为合成金红石粉储存。在一个合成金红石生产能力为140 MT/d的生产装置中，合成金红石粉和TiO2污泥的产量分别为1.0 MT和3.0 MT。本发明旨在对钛铁矿选矿厂生产的合成金红石粉和TiO2污泥进行团聚回收再利用。收稿13-12-2021修回18-12-2021接受22-12-2021发布12-01-2022

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来源期刊

International Journal of Computational Materials Science and Surface Engineering Engineering-Engineering (all)

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： IJCMSSE is a refereed international journal that aims to provide a blend of theoretical and applied study of computational materials science and surface engineering. The scope of IJCMSSE original scientific papers that describe computer methods of modelling, simulation, and prediction for designing materials and structures at all length scales. The Editors-in-Chief of IJCMSSE encourage the submission of fundamental and interdisciplinary contributions on materials science and engineering, surface engineering and computational methods of modelling, simulation, and prediction. Papers published in IJCMSSE involve the solution of current problems, in which it is necessary to apply computational materials science and surface engineering methods for solving relevant engineering problems.