水淬高炉矿渣还原性对高硫尾砂氧化过程的影响探索研究
TD926.4; 尾砂是选矿厂在特定的经济技术条件下,将矿石磨细,选取有用成分后排放的废弃物,是我国排放量最大的工业固废.尾砂的大量堆存不仅会形成安全隐患,还会引起占用土地、污染土地和水体等问题.利用尾砂进行矿山充填是实现尾砂大宗量消纳处置的有效途径.高硫尾砂一般指硫元素含量大于 8%的尾砂,由于高硫尾砂氧化生成的硫酸根达到一定浓度后就会对水泥的硬化过程有破坏作用,导致高硫尾砂在矿山充填中的利用率较低.找到抑制高硫尾砂氧化的方法是降低高硫尾砂环境污染、提高高硫尾砂充填利用率的途径之一.本文通过开展高硫尾砂氧化试验,对水淬高炉矿渣的还原性对高硫尾砂氧化过程的影响开展了探索研究,通过观察试验结果,...
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| Published in | 中国矿业 Vol. 33; no. 11; pp. 206 - 211 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Magazine Article |
| Language | Chinese |
| Published |
华北科技学院,河北 廊坊 065201%云南驰宏锌锗股份有限公司,云南 曲靖 654200
01.11.2024
昆明理工大学,云南 昆明 650000%北京科技大学,北京 100083 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-4051 |
| DOI | 10.12075/j.issn.1004-4051.20241719 |
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| Abstract | TD926.4; 尾砂是选矿厂在特定的经济技术条件下,将矿石磨细,选取有用成分后排放的废弃物,是我国排放量最大的工业固废.尾砂的大量堆存不仅会形成安全隐患,还会引起占用土地、污染土地和水体等问题.利用尾砂进行矿山充填是实现尾砂大宗量消纳处置的有效途径.高硫尾砂一般指硫元素含量大于 8%的尾砂,由于高硫尾砂氧化生成的硫酸根达到一定浓度后就会对水泥的硬化过程有破坏作用,导致高硫尾砂在矿山充填中的利用率较低.找到抑制高硫尾砂氧化的方法是降低高硫尾砂环境污染、提高高硫尾砂充填利用率的途径之一.本文通过开展高硫尾砂氧化试验,对水淬高炉矿渣的还原性对高硫尾砂氧化过程的影响开展了探索研究,通过观察试验结果,结合理论分析和其他学者的研究成果,可以得出结论:①高硫尾砂在水中可以发生氧化反应,主要反应过程为黄铁矿(FeS2)等硫化物与水和水中的溶氧反应生成硫酸根和氢离子;②矿渣微粉对高硫尾砂的氧化过程有抑制作用,可以显著减缓水中高硫尾砂的氧化速率;③矿渣微粉具有还原性,还原性来源是高炉中的还原性气氛,还原性的物质承担者是其中低价态的硫;④矿渣微粉抑制高硫尾砂氧化速率的原因是矿渣中低价态的硫优先与水中的溶氧发生反应,降低了高硫尾砂中硫化物的氧化速率. |
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| AbstractList | TD926.4; 尾砂是选矿厂在特定的经济技术条件下,将矿石磨细,选取有用成分后排放的废弃物,是我国排放量最大的工业固废.尾砂的大量堆存不仅会形成安全隐患,还会引起占用土地、污染土地和水体等问题.利用尾砂进行矿山充填是实现尾砂大宗量消纳处置的有效途径.高硫尾砂一般指硫元素含量大于 8%的尾砂,由于高硫尾砂氧化生成的硫酸根达到一定浓度后就会对水泥的硬化过程有破坏作用,导致高硫尾砂在矿山充填中的利用率较低.找到抑制高硫尾砂氧化的方法是降低高硫尾砂环境污染、提高高硫尾砂充填利用率的途径之一.本文通过开展高硫尾砂氧化试验,对水淬高炉矿渣的还原性对高硫尾砂氧化过程的影响开展了探索研究,通过观察试验结果,结合理论分析和其他学者的研究成果,可以得出结论:①高硫尾砂在水中可以发生氧化反应,主要反应过程为黄铁矿(FeS2)等硫化物与水和水中的溶氧反应生成硫酸根和氢离子;②矿渣微粉对高硫尾砂的氧化过程有抑制作用,可以显著减缓水中高硫尾砂的氧化速率;③矿渣微粉具有还原性,还原性来源是高炉中的还原性气氛,还原性的物质承担者是其中低价态的硫;④矿渣微粉抑制高硫尾砂氧化速率的原因是矿渣中低价态的硫优先与水中的溶氧发生反应,降低了高硫尾砂中硫化物的氧化速率. |
| Abstract_FL | Tailings are the waste discharged by the ore dressing plant under specific economic and technical conditions after grinding the ore finely and selecting the useful components,which is the largest industrial solid waste in China.The massive accumulation of tailings not only creates safety hazards but also brings problems such as occupying land and polluting land and water bodies.The use of tailings for mine filling is an effective way to realize the disposal of tailings in bulk quantity.High sulfur tailing sand generally refers to tailing sand with a sulfur content greater than 8%,and the utilization rate of high sulfur tailings sand in mine filling is relatively low due to the sulfate generated from the oxidation of high sulfur tailings sand,which will have a destructive effect on the hardening process of cement when it reaches a certain concentration.Finding ways to inhibit the oxidation of high sulfur tailing sand is one of the ways to reduce the environmental pollution of high sulfur tailing sand and improve the utilization rate of high sulfur tailing sand filling.In this paper,by carrying out the oxidation experiment of high sulfur tailings sand,it has explored and studied the influence of the reducing property of water quenching blast furnace slag on the oxidation process of high sulfur tailings sand,and by observing the experimental results and combining the theoretical analysis and the research results of other scholars,it can draw the following conclusions:① high sulfur tailing sand can undergo oxidation reaction in water,and the main reaction process is that sulfides such as magnetite pyrite and the dissolved oxygen in the water react with the water to generate sulfate root and hydrogen ions.The mine ore can have oxidation reactions in water and hydrogen ions.② Slag powder has an inhibitory effect on the oxidation process of high sulfur tailings,which can significantly slow down the oxidation rate of high sulfur tailings in water.③ Slag powder has reducing property,the source of reducing property is the reducing atmosphere in the blast furnace,and the material bearer is the sulfur in the low valence state.④ The reason that slag powder inhibits the oxidation rate of high sulfur tailings sand is that the sulfur in the slag in the low valence state reacts preferentially with the dissolved oxygen in the water,which reduces the oxidation rate of sulfide in the high sulfur tailings sand. |
| Author | 程志恒 王宏冰 薛亚军 陈亮 李文臣 李美晨 丁鹏琴 毛明发 |
| AuthorAffiliation | 华北科技学院,河北 廊坊 065201%云南驰宏锌锗股份有限公司,云南 曲靖 654200;昆明理工大学,云南 昆明 650000%北京科技大学,北京 100083 |
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| Author_FL | LI Wenchen CHEN Liang DING Pengqin XUE Yajun LI Meichen CHENG Zhiheng MAO Mingfa WANG Hongbing |
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| Keywords | 氧化过程 high sulfur tailings 高硫尾砂 还原性 胶结充填 oxidative process water quenched blast furnace slag reducibility cemented filling 水淬高炉矿渣 |
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| Publisher | 华北科技学院,河北 廊坊 065201%云南驰宏锌锗股份有限公司,云南 曲靖 654200 昆明理工大学,云南 昆明 650000%北京科技大学,北京 100083 |
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| Snippet | TD926.4; 尾砂是选矿厂在特定的经济技术条件下,将矿石磨细,选取有用成分后排放的废弃物,是我国排放量最大的工业固废.尾砂的大量堆存不仅会形成安全隐患,还会引起占用土地、... |
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| Title | 水淬高炉矿渣还原性对高硫尾砂氧化过程的影响探索研究 |
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