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城市生活垃圾焚烧飞灰与电解锰渣烧制陶粒
Preparation of ceramsite from municipal solid waste incineration fly ash and electrolytic manganese residues
投稿时间:2018-06-12  修订日期:2018-11-05
DOI:
中文关键词:  城市生活垃圾焚烧飞灰  电解锰渣  陶粒  重金属
英文关键词:municipal solid waste incineration(MSWI) fly ash  electrolytic manganese residues(EMR)  ceramsite  heavy metals
基金项目:重庆市科教委项目(Shljzyh2017-001)
作者单位E-mail
胡超超 重庆大学资源及环境科学学院 285527481@qq.com 
王里奥 重庆大学资源及环境科学学院 wangliao@cqu.edu.cn 
詹欣源 重庆大学资源及环境科学学院  
龚健 重庆大学资源及环境科学学院  
柏继松 重庆市生活垃圾资源化处理协同创新中心
重庆市生活垃圾资源化处理协同创新中心 
 
杨鲁 重庆市生活垃圾资源化处理协同创新中心
重庆市生活垃圾资源化处理协同创新中心 
 
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中文摘要:
      为考察城市生活垃圾焚烧飞灰(以下简称飞灰)与电解锰渣,辅以粉煤灰烧制陶粒的可行性,以减少飞灰与电解锰渣中的重金属对环境的危害。通过单因素实验确定原材料最佳配比以及最宜烧制工艺条件,并对焙烧后陶粒的微观形貌以及重金属浸出浓度进行分析。结果表明,随着飞灰掺量的增加,陶粒的颗粒强度与堆积密度降低、吸水率升高,确定最佳原料配比:飞灰掺量为12%、电解锰渣掺量为43%、粉煤灰掺量为45%;最宜烧制工艺条件:预热温度为600 ℃、焙烧温度为1140 ℃。在最佳条件下烧制陶粒的颗粒强度为769 N、堆积密度为687 kg·m-3、吸水率为6.44%;通过微观结构分析,陶粒表面致密呈釉化,内部呈现多孔隙结构;陶粒中重金属浸出浓度均低于国家标准。该研究为飞灰与电解锰渣资源化利用提供了一条新的途径。
英文摘要:
      The feasibility of preparing ceramsite using municipal solid waste incineration (MSWI) fly ash and electrolytic manganese residues (EMR) as raw materials, coal fly ash as an auxiliary material was investigated. The aim of this experiment was to reduce the harm to the environment from the heavy metals in MSWI fly ash and EMR. The optimal mixture ratio of materials and best sintering conditions were obtained by single-factor experiments. Micro-morphology and leaching of heavy metals of ceramsite were analyzed. The results showed that granule strength and bulk density of ceramsite decreased, and the 1h water absorption of ceramic increased with the addition of MSWI fly ash. The optimum mixture ratio of raw materials were obtained: MSWI fly ash, EMR and Coal fly ash was 12%, 43% and 45% respectively. The optimal sintering conditions: preheating temperature of 600°C and roasting temperature of 1140 °C. Under this condition, the performance of ceramsite: granule strength of 769N, bulk density of 687 kg m-3, and 1h water absorption of 6.44%c. Through analyzing microstructure of ceramsite, it showed that ceramsite had a succession glaze layer on surface and pore structure inside, and leaching concentration of heavy metals in ceramsite reached the national standard. It was a novel approach to utilize MSWI fly ash and EMR.
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