Chemical stabilization of fine coal waste as an alternative to slurry impoundments

Z. Duan, R. Q. Honaker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A novel concept involving the deployment of chemical stabilization has the potential to eliminate the need of slurry impoundments and significantly reduce the release of trace elements from the high surface area fine coal waste. The process involves mixing the fine waste generated from the underflow of a thickener operation with chemical stabilization agents to tie up the water and to create a solid waste material that can be discharged directly. Portland cement, sodium silicate, F type flyash, C type flyash and hydraulic lime were evaluated as stabilizing agents. A detailed experimental study has been conducted to identify the conditions that provide the maximum compressive strength within a short curing time. Results to date show the ability to achieve compressive strengths adequate for equipment to maneuver on using a Portland cement concentration of around 10% by weight. Quick-setting concrete was not found to enhance stabilization time and compressive strength.

Original languageEnglish
Title of host publication2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints
Pages695-699
Number of pages5
StatePublished - 2012
Event2012 SME Annual Meeting and Exhibit 2012, SME 2012 - Seattle, WA, United States
Duration: Feb 19 2012Feb 22 2012

Publication series

Name2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints

Conference

Conference2012 SME Annual Meeting and Exhibit 2012, SME 2012
Country/TerritoryUnited States
CitySeattle, WA
Period2/19/122/22/12

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Geotechnical Engineering and Engineering Geology

Fingerprint

Dive into the research topics of 'Chemical stabilization of fine coal waste as an alternative to slurry impoundments'. Together they form a unique fingerprint.

Cite this