High-temperature carbothermal dephosphorization of Malaysian monazite

• Autorzy: Udayakumar Sanjith , Sheikh Abdul Hamid Sheikh Abdul Rezan , Baharun Norlia , Pownceby Mark

Identyfikatory

DOI

10.37190/ppmp/143174

• Języki publikacji: EN

Abstrakty

EN

High-temperature carbothermal reduction experiments with graphite powder were conducted to assess the dephosphorization behavior of Malaysian monazite concentrate. Thermodynamic analysis of the possible dephosphorization reactions was conducted to evaluate the feasibility of the carbothermal reduction of the monazite phases. The effects of temperature, particle size, and monazite to carbon ratio were then investigated under different conditions. The carbothermal reduction experiments were conducted based on the Taguchi design method, and up to 97% of phosphorous removal was achieved under optimized conditions. The optimal conditions for dephosphorization were determined as; a reduction temperature of 1350 °C, a particle size of -75 μm, and monazite to carbon molar ratio of 0.3. Microstructural and phase characterization of the dephosphorized products revealed that CeO2, Nd2O3, La2O3, and Pr2O3 oxide phases were prominent, and no residual peaks of monazite remained in the reduced products. The information gained from the study can aid in the design of a suitable post-dephosphorization hydrometallurgical treatment for exploiting Malaysian monazite as a local source of REEs.

Słowa kluczowe

EN

malaysian monazite concentrate; dephosphorization; carbothermal reduction; rare earth elements; graphite

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 6
• Strony: 140--155
• Opis fizyczny: Bibliogr. 36 poz., rys. kolor.

Twórcy

autor

Udayakumar Sanjith

• School of Materials, Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

autor

Sheikh Abdul Hamid Sheikh Abdul Rezan

• School of Materials, Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

autor

Baharun Norlia

• School of Materials, Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

autor

Pownceby Mark

• CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia

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