Page 26 - HUB-4 Magazine Issue 85

Aggregate
Washing & Screening
Goonvean Aggregates increases efficiency, productivity and profitability with McLanahan Wash Plant
Kingdom. Founded in 1931, Goonvean Aggregates serves a wide range of markets, including construction, sports, agriculture and more, with a variety of products, such as sub- bases and fills, drainage media, graded construction aggregates, mortar and plastering sands and walling stone, to name a few. The company is committed to providing quality products to the marketplace while helping other businesses make a positive contribution to improving environmental sustainability.
Challenge
At its Melbur Quarry in Cornwall, Goonvean Aggregates processes granite-based secondary aggregates. Secondary aggregates are the byproducts of other industrial processes. They are used as fully compliant alternatives to primary aggregates, contributing to sustainable construction practices, the circular economy and overall environmental sustainability.
Goonvean Aggregates receives its feed material — the secondary aggregates — from a supplier. After processing the aggregate, a portion of it would be sent back to the supplier and taken to the landfill, or tip. Since sustainability is extremely important to Goonvean Aggregates, the company wanted a way to be able to utilize all its material without having to send any of it back to the supplier and without having to take any to tip.
Solution
Goonvean Aggregates partnered with McLanahan to design a wash plant with water recycling capabilities to integrate with its existing crushing plant or to be fed independently. McLanahan supplied an UltraWASH Modular Wash Plant, UltraSAND Plant and 10m EcoCycle High-Rate Thickener.
The feed material enters the UltraWASH Modular Wash Plant
either directly from the crushing process or directly through a feed hopper. The UltraWASH washes the material and separates it into three aggregate sizes and one double-washed sand product. The UltraSAND Plant washes the residue product, which is then incorporated into one of the other sand products.
The EcoCycle Thickener accepts the waste streams generated from the UltraWASH and UltraSAND Plants and separates the solids from the liquid in the slurry to recover immediately reusable process water. This process water is then reused back in the wash plants for cleaning the aggregate material, further adding to the site’s sustainability.
“Since we chose McLanahan as a partner, we’ve been quite productive in the way we’ve been able to reutilize and adapt the plant to our bespoke nature for the product we’re looking to produce,” said Matthew Penny, General Manager of Goonvean Aggregates. “The dialogue and feedback have been very strong and allowed us to end up with a plant that meets our requirements and needs.”
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www.hub-4.com Nov/Dec- Issue 83