Technology, Mechanism, and Application Progress for Ceramsite Prepared by Iron Tailings
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摘要:
我国铁尾矿分布范围广、堆存量大，造成了严重的土地占用和环境污染等问题。铁尾矿基陶粒作为轻骨料，具有轻质高强、吸水率低、抗冻性能良好等特点，可应用于建筑材料、园艺、水处理等领域。阐述了陶粒的种类、铁尾矿用于制备陶粒的原料适用性，介绍了铁尾矿制备焙烧陶粒和免烧陶粒的工艺及其产品性能优劣，分析了铁尾矿基陶粒在焙烧和免烧过程中的反应机理，归纳了铁尾矿基陶粒气孔结构的形成原理及研究现状，系统总结了铁尾矿基陶粒的应用现状，提出了未来研究需要解决的问题及发展方向。利用铁尾矿制备陶粒，对促进铁尾矿资源的循环利用和矿山环境保护具有深远意义。
Abstract:The iron tailings is widely distributed in China and stockpiled in large volume, which results in serious problems including land occupation and environmental pollution. The iron tailings−based ceramsite, a kind of lightweight aggregate, is characterized by lightweight and high strength, low water absorption, and well frost−resistance, and can be used in building materials, horticulture, and water treatment. The types of ceramsite and the feasibility of using iron tailings as raw material for preparing ceramisite was discussed in this paper. Then, the preparation technologies for roasted ceramisite and unfired ceramisite were introduced and the products performance were compared. The reaction mechanisms for iron tailings−based ceramisite in roasting and no−firing processes were also analyzed. Furthermore, the formation principle of pore structure for iron tailings−based ceramisite and its research status were concluded. Finally, the problems that need to be solved in future and the development direction were put forward basing application status of iron tailings−based ceramisite. Overall, preparation of ceramsite using iron tailings has great significance to promote the recycling of iron tailings resources and environmental protection of mine.
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Key words:
- iron tailings /
- ceramsite /
- reaction mechanism /
- pore structure
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表 1 铁尾矿焙烧陶粒化学反应方程式
Table 1. Chemical reaction equations for roasted ceramsite prepared by iron tailings
反应类型 反应式 序号 气体生成 
（1） 
（2） 
（3） 
（4） 
（5） 
（6） 
（7） 
（8） 
（9） 
（10） 
（11） 
（12） 
（13） 长石生成 
（14） 
（15） 
（16） 
（17） 
（18） 
（19） 辉石生成 
（20） 
（21） 莫来石生成 
（22） 
（23） 
下载: 导出CSV
表 2 铁尾矿免烧陶粒水化反应方程式
Table 2. Hydration reaction equations for unfired ceramsite prepared by iron tailings
反应类型 反应式 序号 水化反应 
（1） 
（2） 
（3） 
（4） 
（5）
下载: 导出CSV
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