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| Study on Collaborative Washing Technology of Thallium-containing High Salt Solid Waste and Wastewater from Steel Industry |
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Received:December 01, 2023
Revised:December 11, 2023
Accepted:December 12, 2023
Published Online:March 04, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.04.010 |
| KeyWord:sintering machine head ash; desulfurization wastewater; thallium; water leaching; resource recycling |
| Author | Institution |
| ZHANG Xuekai |
国家烧结球团装备系统工程技术研究中心;中冶长天国际工程有限责任公司 |
| HE Yingjie |
国家烧结球团装备系统工程技术研究中心;中冶长天国际工程有限责任公司 |
| LI Jia |
中冶长天国际工程有限责任公司 |
| KANG Jiangang |
国家烧结球团装备系统工程技术研究中心;中冶长天国际工程有限责任公司 |
| YANG Bentao |
国家烧结球团装备系统工程技术研究中心;中冶长天国际工程有限责任公司 |
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| Abstract: |
| A large amount of sintering machine head ash and desulfurization wastewater was generated during iron and steel sintering process, which contains high salt and highly toxic heavy metal thallium. The disposal of the ash and wastewater has become one of the key issues restricting the sustainable development of iron and steel industry. A synergistic treatment approach for high salinity solid waste containing thallium and high salinity wastewater was proposed. The results show that the concentration of thallium in the solution after washing is less than 5 mg/L by using 1/4 concentration activated carbon desulfurization wastewater as the leaching agent, moreover, the dissolution of calcium and magnesium also decreased. The effects of various components in activated carbon desulfurization wastewater on the leaching behavior of thallium during the leaching process of sintering machine head ash were studied. The results indicate that the presence of SO32? and appropriate pH value show a significant inhibitory effect on dissolution of thallium. |
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