Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process
The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing. In this work, the interacti...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/13/1/35 |
| _version_ | 1797438453009350656 |
|---|---|
| author | Qihang Liu Ruilin Liu Shuangping Yang Weiguo Feng Miao Wang |
| author_facet | Qihang Liu Ruilin Liu Shuangping Yang Weiguo Feng Miao Wang |
| author_sort | Qihang Liu |
| collection | DOAJ |
| description | The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing. In this work, the interaction between various impurity elements in the treatment process of molybdenum concentrate was studied by process simulation experiments combined with X-ray fluorescence (XRF) and X-ray diffraction (XRD), inductively coupled plasma-optical emission spectrometer (ICP-OES), ion chromatography (IC), scanning electron microscope-energy dispersive spectrometry (SEM-EDS), the use of FactSage7.0 modeling and the mineral liberation analyzer (MLA). The results show that most of the impurity elements such as K, Si and Al exist in the form of alkaline minerals with large molecular weight. In the roasting process of molybdenum concentrate, K-containing minerals, such as muscovite and orthoclase, can be transformed into K<sup>+</sup>, Al<sup>3+</sup> and other soluble ions, and then can be removed by water washing. Humidification increased the conversion degree of orthoclase to soluble ions, which was conducive to the removal of impurities by the washing process. The results of MLA microscopic analysis confirmed that impurities such as FeS<sub>2</sub>, CaSO<sub>4</sub>, SiO<sub>2</sub>, and especially FeS<sub>2</sub>, would form a high density mixture with MoO<sub>3</sub> during the high temperature roasting process, and thus reduced the leaching rate of Mo. Therefore, the humidification and control of the molybdenum concentrate is an effective measure to remove impurities. |
| first_indexed | 2024-03-09T11:38:06Z |
| format | Article |
| id | doaj.art-6a89d8842d614047a0b885026cac1fb9 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T11:38:06Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-6a89d8842d614047a0b885026cac1fb92023-11-30T23:38:53ZengMDPI AGMinerals2075-163X2022-12-011313510.3390/min13010035Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment ProcessQihang Liu0Ruilin Liu1Shuangping Yang2Weiguo Feng3Miao Wang4School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaTechnical Centre, Jinduicheng Molybdenum Co., Ltd., Xi’an 710077, ChinaSchool of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaThe removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling. Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing. In this work, the interaction between various impurity elements in the treatment process of molybdenum concentrate was studied by process simulation experiments combined with X-ray fluorescence (XRF) and X-ray diffraction (XRD), inductively coupled plasma-optical emission spectrometer (ICP-OES), ion chromatography (IC), scanning electron microscope-energy dispersive spectrometry (SEM-EDS), the use of FactSage7.0 modeling and the mineral liberation analyzer (MLA). The results show that most of the impurity elements such as K, Si and Al exist in the form of alkaline minerals with large molecular weight. In the roasting process of molybdenum concentrate, K-containing minerals, such as muscovite and orthoclase, can be transformed into K<sup>+</sup>, Al<sup>3+</sup> and other soluble ions, and then can be removed by water washing. Humidification increased the conversion degree of orthoclase to soluble ions, which was conducive to the removal of impurities by the washing process. The results of MLA microscopic analysis confirmed that impurities such as FeS<sub>2</sub>, CaSO<sub>4</sub>, SiO<sub>2</sub>, and especially FeS<sub>2</sub>, would form a high density mixture with MoO<sub>3</sub> during the high temperature roasting process, and thus reduced the leaching rate of Mo. Therefore, the humidification and control of the molybdenum concentrate is an effective measure to remove impurities.https://www.mdpi.com/2075-163X/13/1/35impurity removalmolybdenum concentratethermodynamicroastinghumidification |
| spellingShingle | Qihang Liu Ruilin Liu Shuangping Yang Weiguo Feng Miao Wang Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process Minerals impurity removal molybdenum concentrate thermodynamic roasting humidification |
| title | Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process |
| title_full | Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process |
| title_fullStr | Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process |
| title_full_unstemmed | Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process |
| title_short | Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process |
| title_sort | removal mechanism of mineral impurities in molybdenum concentrate treatment process |
| topic | impurity removal molybdenum concentrate thermodynamic roasting humidification |
| url | https://www.mdpi.com/2075-163X/13/1/35 |
| work_keys_str_mv | AT qihangliu removalmechanismofmineralimpuritiesinmolybdenumconcentratetreatmentprocess AT ruilinliu removalmechanismofmineralimpuritiesinmolybdenumconcentratetreatmentprocess AT shuangpingyang removalmechanismofmineralimpuritiesinmolybdenumconcentratetreatmentprocess AT weiguofeng removalmechanismofmineralimpuritiesinmolybdenumconcentratetreatmentprocess AT miaowang removalmechanismofmineralimpuritiesinmolybdenumconcentratetreatmentprocess |