Managing and disposing of processing waste safely and effectively

Implementing a Dry Stack Tailings (DST) solution provides a safe and sustainable alternative to the storage of tailings in impoundments.

The recent commissioning of a Dry Stack Tailings (DST) system supplied by TAKRAF to a Brazilian mine highlights the advanced expertise and unique positioning of the company to offer a complete end-to-end solution for safe and environmentally friendly mine waste management.

The order, placed by Mineração Usiminas, one of the Usiminas companies, and one of the largest steel producers in the Americas, comprised basic and detailed engineering, manufacturing, supply, transportation, and site assembly supervision of equipment to process iron ore tailings.

The system is designed as a fully integrated dewatering process via thickening and filtration. The process dewaters the tailings slurry in a single stream – a two-stage process using a DELKOR high-rate thickener followed by the filtration of thickener underflow using DELKOR overhead filter presses. The next process step allows further water recovery through the filter press, designed to achieve a moisture content level of about 14% (dry basis). Particular attention has been given to the redressing of the slurry using reagents to improve maximum recovery. The result is a dry filter cake that can be effectively handled and deposited.

For more information, visit: http://www.takraf.com