Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa
This is an article in the field of metallurgical engineering. In view of the problems of low compressive strength and high reduction temperature in the gas-base reduction of a high-phosphorus iron ore, a new process of oxidation roasting, gas-based reduction followed by magnetic separation was propo...
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| Format: | Article |
| Language: | zho |
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Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2024-02-01
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| Series: | Kuangchan zonghe liyong |
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| Online Access: | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.01.018 |
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| author | Shichao WU Ruizhuo GAO Tichang SUN Wusheng HUANG Li YAN |
| author_facet | Shichao WU Ruizhuo GAO Tichang SUN Wusheng HUANG Li YAN |
| author_sort | Shichao WU |
| collection | DOAJ |
| description | This is an article in the field of metallurgical engineering. In view of the problems of low compressive strength and high reduction temperature in the gas-base reduction of a high-phosphorus iron ore, a new process of oxidation roasting, gas-based reduction followed by magnetic separation was proposed. The effect of oxidation temperature and the types and dosages of dephosphorization on the compressive strength of the oxidized pellets were investigated, and the conditions of oxidation roasting that met the strength requirements of the shaft furnace were found. On this basis, the effects of reducing temperature, total reducing gas flow rate, reducing gas composition and reducing time on iron recovery and dephosphorization were studied. The results showed that under the conditions of 10% Na2CO3 dosage, oxidation temperature 1200 ℃, oxidation time 60 min, reduction temperature 950 ℃, flow rates of H2 and CO were 3.75 L/min and 1.25 L/min, respectively, and reduction time 180 min, Iron grade, iron recovery and phosphorus content were 91.15%, 93.07% and 0.14%, respectively. The SEM results show that the phosphorus in the powdered reduced iron exists in the form of mechanical inclusions, and the phosphorus is removed by grinding-magnetic separation. |
| first_indexed | 2024-04-24T20:23:51Z |
| format | Article |
| id | doaj.art-80cfcc5bab12438b8882ad5daa5bb9cd |
| institution | Directory Open Access Journal |
| issn | 1000-6532 |
| language | zho |
| last_indexed | 2024-04-24T20:23:51Z |
| publishDate | 2024-02-01 |
| publisher | Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Kuangchan zonghe liyong |
| spelling | doaj.art-80cfcc5bab12438b8882ad5daa5bb9cd2024-03-22T07:31:13ZzhoInstitute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological SciencesKuangchan zonghe liyong1000-65322024-02-0145114414810.3969/j.issn.1000-6532.2024.01.0182024-01wushichaoOxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in AfricaShichao WU0Ruizhuo GAO1Tichang SUN2Wusheng HUANG3Li YAN4School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaQingdao Venus Mining Co., Ltd., Qingdao 266748, Shandong, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSinosteel Equipment Co., Ltd. Beijing 100080, ChinaSinosteel Equipment Co., Ltd. Beijing 100080, ChinaThis is an article in the field of metallurgical engineering. In view of the problems of low compressive strength and high reduction temperature in the gas-base reduction of a high-phosphorus iron ore, a new process of oxidation roasting, gas-based reduction followed by magnetic separation was proposed. The effect of oxidation temperature and the types and dosages of dephosphorization on the compressive strength of the oxidized pellets were investigated, and the conditions of oxidation roasting that met the strength requirements of the shaft furnace were found. On this basis, the effects of reducing temperature, total reducing gas flow rate, reducing gas composition and reducing time on iron recovery and dephosphorization were studied. The results showed that under the conditions of 10% Na2CO3 dosage, oxidation temperature 1200 ℃, oxidation time 60 min, reduction temperature 950 ℃, flow rates of H2 and CO were 3.75 L/min and 1.25 L/min, respectively, and reduction time 180 min, Iron grade, iron recovery and phosphorus content were 91.15%, 93.07% and 0.14%, respectively. The SEM results show that the phosphorus in the powdered reduced iron exists in the form of mechanical inclusions, and the phosphorus is removed by grinding-magnetic separation.http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.01.018metallurgical engineeringhigh phosphorus iron oreoxidation roastinggas base reductionmagnetic separation |
| spellingShingle | Shichao WU Ruizhuo GAO Tichang SUN Wusheng HUANG Li YAN Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa Kuangchan zonghe liyong metallurgical engineering high phosphorus iron ore oxidation roasting gas base reduction magnetic separation |
| title | Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa |
| title_full | Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa |
| title_fullStr | Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa |
| title_full_unstemmed | Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa |
| title_short | Oxidation Roasting, Gas-based Reduction Followed by Magnetic Separation of a High Phosphorus Iron Ore in Africa |
| title_sort | oxidation roasting gas based reduction followed by magnetic separation of a high phosphorus iron ore in africa |
| topic | metallurgical engineering high phosphorus iron ore oxidation roasting gas base reduction magnetic separation |
| url | http://www.kczhly.com/en/article/doi/10.3969/j.issn.1000-6532.2024.01.018 |
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