Coal Age

APR 2016

Coal Age Magazine - For more than 100 years, Coal Age has been the magazine that readers can trust for guidance and insight on this important industry.

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Site-specific variations: No solution is catch-all. This includes paste. Each site and each material is different and should be considered individually. In some cas- es, such as a power plant that is close to an established landfill, it may be more appropriate to just truck the CCR there for disposal and treat the wastewater streams separately. Paste is one tool in the toolbox of the power plant operator and should be considered in any option's assessment. The key is to look at the sys- tem holistically and consider the techni- cal, social, environmental and economic factors before making a decision. Paste technology has the advantage of being mature and well-established so that equipment is reliable, cost-effective and available from many manufacturers. There is a wide range of professionals who are experi- enced at its design, setup and operation, making for a good pool of skilled expertise to help the power sector apply this technology to manage its CCR disposal challenges. Sue Longo (P. Eng, MBA) is a principal in the Paste Engineering and Design divi- sion of Golder Associates, based in the company's Calgary, Alberta office. Tel: 1.403.299.5600; sue_longo@golder.com. o p e r a t i n g i d e a s c o n t i n u e d April 2016 www.coalage.com 41 At a power plant and its nearby coal mine in Brazil, high winds in the area would catch the dry fly ash within the plant, blowing it all over the plant itself and into the surrounding countryside. A recent plant expansion had increased the size of this problem. The solution has involved wetting the fly ash and bottom ash and homogenizing them into a thickened material and combining with the appropriate reagents. The resulting paste is pumped via pipeline to a disposal area within a worked-out part of the mine, 2.5 km from the plant. Deposited in thin layers, the past hardens to a trafficable surface in a few days, alleviating the windborne dust problem. Case Study: Managing Windborne Fly Ash in Brazil Fly ash paste about seven days after deposition — note the desiccation cracks and lack of dust. Turn-key Contractor for Borehole Cable Installations and Retrievals • Cable Sales • Vulcanizing Capabilities • Underground Installations • Substation Terminations Experience and Credibility Anything Less…Costs More 724-352-1541 office@rckadykcorp.com www.rckadykcorp.com R.C. Kadyk Corporation Mining Cable Specialists

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