ASH ALCHEMY-​ Ash Beneficiation in the Production of Waste Liner Materials

Cyril Attwell, ARC Innovations
Kelley Reynolds-Clausen, Eskom Holdings SOC LTD
Phenyo Mvuyana, Eskom Holdings SOC LTD

Description

Ash Beneficiation in the Production of Waste Liner Materials Authors Mr. Cyril Attwell - South Africa - ARC Innovations Dr. Kelley Reynolds-Clausen - South Africa - Eskom Holdings SOC LTD Ms. Phenyo Mvuyana - South Africa - Eskom Holdings SOC LTD Abstract Ash Beneficiation in the Production of Waste Liner Materials. Kelley Anne Reynolds-Clausen1, Phenyo N Mvuyana2 and Cyril N Attwell3 1Eskom Research, Testing and Demonstration, Eskom Holdings SOC Ltd, South Africa. reynolka@eskom.co.za. 2Eskom Transmission, Eskom Holdings SOC, Ltd, South Africa mvuyanp@eskom.co.za; Dukhand@eskom.co.za 3ARC Innovations, 83 Bonnyvale Road, .Norton Home Estates, Gauteng, South Africa. Cyril.attwell@eskom.co.za Keywords: Alkali-activation, coal ash, liners, waste management South African legislation, under the National Environmental Management: Waste Act (NEMWA) of classifies coal ash as a Type 3 waste, due to the concentrations of certain chemical constituents. This Type of waste requires a Class C, 3-layer liner, which includes a plastic (HDPE) layer. The other layers are impermeable clay and cushioning sand, which are placed below and above the HDPE respectively. Recent legislative changes have allowed the use of alternative materials for the construction of these layers, providing they offer the same properties, permeability and support for the sand and impermeability for the clay. Activated Ash materials have been developed in South Africa, using commercial user friendly activators, which are proven to offer the required properties, while utilising the local legacy ash. This paper will expand on the work completed to date and highlight the on-going research.

 
May 14th, 11:30 AM May 14th, 12:00 PM

ASH ALCHEMY-​ Ash Beneficiation in the Production of Waste Liner Materials

Grand Rapids, Michigan

Ash Beneficiation in the Production of Waste Liner Materials Authors Mr. Cyril Attwell - South Africa - ARC Innovations Dr. Kelley Reynolds-Clausen - South Africa - Eskom Holdings SOC LTD Ms. Phenyo Mvuyana - South Africa - Eskom Holdings SOC LTD Abstract Ash Beneficiation in the Production of Waste Liner Materials. Kelley Anne Reynolds-Clausen1, Phenyo N Mvuyana2 and Cyril N Attwell3 1Eskom Research, Testing and Demonstration, Eskom Holdings SOC Ltd, South Africa. reynolka@eskom.co.za. 2Eskom Transmission, Eskom Holdings SOC, Ltd, South Africa mvuyanp@eskom.co.za; Dukhand@eskom.co.za 3ARC Innovations, 83 Bonnyvale Road, .Norton Home Estates, Gauteng, South Africa. Cyril.attwell@eskom.co.za Keywords: Alkali-activation, coal ash, liners, waste management South African legislation, under the National Environmental Management: Waste Act (NEMWA) of classifies coal ash as a Type 3 waste, due to the concentrations of certain chemical constituents. This Type of waste requires a Class C, 3-layer liner, which includes a plastic (HDPE) layer. The other layers are impermeable clay and cushioning sand, which are placed below and above the HDPE respectively. Recent legislative changes have allowed the use of alternative materials for the construction of these layers, providing they offer the same properties, permeability and support for the sand and impermeability for the clay. Activated Ash materials have been developed in South Africa, using commercial user friendly activators, which are proven to offer the required properties, while utilising the local legacy ash. This paper will expand on the work completed to date and highlight the on-going research.