Filling performance of paste material cemented with electrolytic manganese residue

WANG Zaiqian; ZHAO Xiaorong; XIE Xiuqing; WANG Ruting; HUANG Xuquan

doi:10.11835/j.issn.2096-6717.2021.246

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Filling performance of paste material cemented with electrolytic manganese residue

Civil Engineering | 更新时间：2023-11-21

- Filling performance of paste material cemented with electrolytic manganese residue
- Journal of Civil and Environmental Engineering Vol. 45, Issue 6, Pages: 180-188(2023)
- 作者机构：
  
  1.三峡大学，水利与环境学院，湖北宜昌443002
  2.三峡大学，三峡库区生态环境教育部工程研究中心，湖北宜昌443002
  3.三峡大学，湖北省磷石膏资源化综合利用企校联合创新中心，湖北宜昌443002
- 作者简介：
  
  WANG Zaiqian (1997- ), main research interests: solid waste disposal and resource utilization, E-mail: 1141892218@qq.com.
  HUANG Xuquan （corresponding author）， PhD， associate professor， E-mail： huangxuquan@126.com.
- 基金信息：
  
  Natural Science Foundation of Yichang(A21-3-003);Natural Science Foundation of Hubei Province(2019CFB201)
- DOI：10.11835/j.issn.2096-6717.2021.246
  CLC： X753
- Received：24 June 2021，
  
  Published：25 December 2023
- 稿件说明：
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王再骞,赵小蓉,谢秀情等.电解锰渣胶结膏体材料的充填性能[J].土木与环境工程学报,2023,45(06):180-188.

WANG Zaiqian,ZHAO Xiaorong,XIE Xiuqing,et al.Filling performance of paste material cemented with electrolytic manganese residue[J].Journal of Civil and Environmental Engineering,2023,45(06):180-188.
王再骞,赵小蓉,谢秀情等.电解锰渣胶结膏体材料的充填性能[J].土木与环境工程学报,2023,45(06):180-188. DOI： 10.11835/j.issn.2096-6717.2021.246.

WANG Zaiqian,ZHAO Xiaorong,XIE Xiuqing,et al.Filling performance of paste material cemented with electrolytic manganese residue[J].Journal of Civil and Environmental Engineering,2023,45(06):180-188. DOI： 10.11835/j.issn.2096-6717.2021.246.

摘要

针对电解锰渣占用大量土地资源、易产生重金属污染等问题，使用电解锰渣基胶凝材料、原状电解锰渣、中粗砂等材料制备电解锰渣自胶结膏体充填材料用于矿山回填。测试充填材料水化浆体流动度、试件抗压强度和浸出毒性，以评价该材料的性能，并用X射线衍射、扫描电镜进行表征。结果表明：该充填材料浆体流动度达到200 mm，流动性能满足充填技术要求；充填材料固化体固化28 d后，抗压强度可达到1.5 MPa以上，达到矿采场充填体强度要求；充填材料浸出毒性明显降低，主要污染重金属Mn、Co被充分固化稳定，浸出毒性满足地下水标准。固化体XRD及SEM分析发现，该充填材料水化生成的水化硅酸钙、钙矾石等晶体是固化体强度稳定、重金属得以固化的主要原因。研究表明，该方法能有效固化/稳定化电解锰渣，降低环境污染风险。

Abstract

Electrolytic manganese residue (EMR) occupies a lot of land resources and may result in potential heavy metal pollution. In order to solve these problems

electrolytic manganese residue-based cementitious materials

initial electrolytic manganese residue and medium-coarse sand were employed to fabricate the filling material self-cemented with electrolytic manganese residue used for mine backfilling. The fluidity

compressive strength and leaching toxicity of hydration slurry of the filled composite were tested to evaluate the performances of the synthetic material

and the microstructure was characterized with X-ray diffraction and scanning electron microscopy. The results showed that the fluidity of the filling material slurry reached 200 mm

meeting the needs of technical requirements of filling; the compressive strength of the solidified body of the filling material could reach 1.5 MPa or more after curing for 28 days

meeting the conditions of the filling body strength for mining site; the leaching toxicity of the filling material significantly reduced with the main heavy metals including Mn and Co fully solidified and stabilized

meeting the national groundwater quality standard. The results of XRD and SEM analysis make it clear that the hydrated calcium silicate

ettringite and other crystals generated by the hydration of the filling material are the main reasons why the strength of the solidified body was stable and the heavy metals were solidified. All these findings indicated that this method could effectively solidify/stabilize electrolytic manganese residue and reduce the risk of environmental pollution.

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