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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liu, Mingxia Luo, Jun Deng, Bona Li, Guanghui Jiang, Tao Ye, Qing Peng, Zhiwei |
| Description | Country affiliation: China Author Affiliation: Deng B ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.); Li G ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China. Electronic address: liguangh@csu.edu.cn.); Luo J ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.); Ye Q ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.); Liu M ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.); Peng Z ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.); Jiang T ( School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan 410083, China.) |
| Abstract | As a major byproduct generated in the alumina industry, bauxite ore residue is an important reserve of scandium and titanium. In this study, the feasibility and mechanism of enriching Sc O and TiO from a non-magnetic material, which was obtained from carbothermal reductive roasting and magnetic separation of bauxite ore residue, were investigated based on a two-step (acidic and alkali) leaching process. It was revealed that approximately 78% SiO and 30-40% of CaO, FeO and Al O were removed from a non-magnetic material with 0.0134wt.% Sc O and 7.64wt.% TiO by phosphoric acidic leaching, while about 95% Al O and P O were further leached by subsequent sodium hydroxide leaching of the upper-stream leach residue. A Sc O -, TiO - rich material containing 0.044wt.% Sc O and 25.5wt.% TiO was obtained, the recovery and the enrichment factor of Sc O and TiO were about 85% and 5, respectively. The enrichment of Sc O was attributed to higher pH (>3.3) of phosphoric acid solution than its dissolution pH , and the enrichment of TiO was mainly associated with the insoluble perovskite (CaTiO ) in the acidic solution at ambient temperature. As Sc O and TiO cannot be dissolved in the alkali solution, they were further enriched in the leach residue. |
| ISSN | 03043894 |
| Journal | Journal of Hazardous Materials |
| Volume Number | 331 |
| e-ISSN | 18733336 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-02-16 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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