Rock Products

JUL 2019

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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20 • ROCKproducts • July 2019 www.rockproducts.com tĂƐŚŝŶŐ Maximum Result Collier Materials Finds a Custom-Made Washing Solution. By Mark S. Kuhar C ollier Materials has been produc- ing sand, granite and gravel out of Texas for 46 years. The locally-owned company has been operating out of its Marble Falls pit since 1973 under the direction of the Collier family. The company has recently added locations in Llano and Georgetown, Texas. The firm's original operations focused on the decomposed granite business and they have built a strong reputation for producing high-quality landscaping and construction products that are sup- plied to customers throughout Texas. Kevin Collier believes they have some of the best rock and sand that is being produced in north Austin. It is at Georgetown where the company has recently upgraded operations and already the investment is paying off. The successful Georgetown site pro- cesses a clay-bound limestone-based raw feed, comprising an excess of 4-8 mesh in the material. A tough material to contend with, it had been causing the operator some problems as they strived to achieve a consistent, quality grade of C-33 spec sand, in high-volume while also striv- ing to improve site maintenance and operations. After facing issues with its existing cyclone-based wet process- ing system, Collier turned to the sand washing experts, CDE, who they had successfully partnered with in the past. Here Comes CDE With a portfolio of more than 2,000 wet processing installations across the world since 1992 and tried-and-tested high-tech solutions, combined with a proven track record at Collier's Llano site, a CDE wet-processing solution was identified as the solution to Col- lier's ongoing problem. And the CDE USA team, headquartered in Cleburne, Texas, were up for the challenge. Thomas Wick, business development manager at CDE's Cleburne base, explained, "We fully appreciated that Kevin and his team needed a full-ser- vice partner who could work to understand their plant, feed materials, and specific needs, to co-create the right solution, quickly. Collier Materi- als had experienced the effectiveness of a CDE plant previously, but for us, no two plants are the same. This time, our engineers went straight to their site to work hand-in-hand with them to design, manufacture, install and com- mission a custom-built solution." Collier's previous off-the-shelf plant on the Georgetown site was not achieving the required quality and consistency to meet C-33 spec approval and the man- agement and maintenance of its pond was proving inefficient and costly. The system was not removing enough #200 from the sand feed, which varied from 17% to 25% of the feed. It was also losing a significant amount of valuable concrete sand to the settling ponds. CDE was therefore appointed to provide a custom-made washing solu- tion that would guarantee to remove the high amount of #200 and reduce the need for pond maintenance on site. Collier noted, "We needed advice and support with replacing a wet process- ing line that wasn't working out for us – it was a similar system, but not quite of the same caliber and hadn't been custom designed to cope with our raw feed. The main problems were that the product spec wasn't consistent, and it wasn't producing the grade we needed." Fractions Lost As a result of the limited capacity of cut points, the company found that valuable fractions were being lost to ponds along with the overflow, which in turn meant a significant increase in pond footprint

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