Tag Archives: Clean TeQ Water

Clean TeQ aims for tailings management leadership with ATA acquisition

Environmental, Mineral processing, Mining mergers and acquisitions, Mining services, Sustainable mining, Water management, , , , , , ,

Clean TeQ has signed an agreement to acquire ATA® in a deal that, it says, will accelerate its dewatering technology offering as part of targeted expansion into the global mine tailings management industry.

The agreement sees Clean TeQ exercise an option to purchase ATA from US-based Soane Labs LLC. ATA, Clean Teq says, represents a step change to both the economics and environmental sustainability of global mine tailings management by:

  • Delivering rapid separation of water and solids from both in-process and in situ tailings;
  • Producing stackable dry tailings without the high capital and operating cost of mechanical compression commonly used in the market; and
  • Recycling process water for reuse in operations, including the potential to recover dissolved metals otherwise lost to waste.

Economically efficient and environmentally sound tailings rehabilitation is a recognised priority for the mining industry, as companies increasingly emphasise sustainable metal production, reducing legacy issues and improving social licence to operate, Clean Teq says.

Peter Voigt, CEO of Clean TeQ Water Limited, said: “We have been working with the ATA technology for over 12 months and are satisfied that it has the potential to change the way mine tailings are processed for mine rehabilitation. ATA complements Clean TeQ’s market-leading metal extraction technologies and enables the company’s strategy to become a leader in the global mine tailings management industry in the rapidly growing global mine tailings management industry.”

The ATA technology was developed to offer a secure and low-cost mine tailings treatment process by rapidly separating water and solids to produce stackable dry tailings and recycled water. The technology uses smart chemistry to rapidly agglomerate the solids in ore slurries. The solids dewater under their own gravity, removing the need for high capital and operating cost pressured filtration used in the industry today. The resulting materials can be compressed and stacked, with the extracted water being returned to recycle (or sent for recovery of dissolved metals), dramatically reducing water usage. In underground mining operations the compact material may also be used for backfilling, with or without cement, according to Clean Teq.

Clean TeQ said: “Mine waste dewatering presents an enormous market opportunity for Clean TeQ. Tailings management is a significant environmental and safety challenge for the industry, particularly for mines in tropical climates where natural evaporation rates are low, or where seismic activity increases geotechnical risks. As environmental bonding requirements increase in response to higher perceived risk in managing tailings storage facilities, ATA’s unique rapid and low-cost dewatering offering will enhance the mining industry’s environment credentials while lowering operating and mine site rehabilitation costs.”

On August 9, 2022, Clean TeQ announced the signing of the exclusive global technology licence agreement with Soane Labs for the ATA technology. This provided Clean TeQ with an exclusive global licence to exploit the ATA technology, with an option to purchase the technology, at Clean TeQ Water’s discretion and at a pre-agreed value, within 18 months of signing. In accordance with the agreement, the company has decided to exercise the option to purchase the ATA technology and entered into a purchase agreement on September 20, 2023, through a 100% scrip issue for a total consideration of A$3 million ($1.9 million).

ATA will be deployed in conjunction with the company’s proprietary metal extraction technologies (Clean-iX®) as part of a strategy to provide the mining industry with a holistic mine tailings rehabilitation solution that, the company says, delivers:

  • Best-in-class tailings management, via future partnerships with both potential customers and experienced tailings management teams;
  • Market leading technologies that provide a step change in the economic and environmental sustainability of mine tailings management; and
  • Dry stacked and minimal footprint tailings solutions for current and legacy wet tailings sites, including the ability for underground backfill.

Clean TeQ says it is planning pilot-scale testing at several sites in the coming months leading to full scale commercial implementation.

Multotec, Clean TeQ bring mine effluent treatment solution to Africa

Environmental, Mining services, Water management, , , , , ,

Multotec Process Equipment and Clean TeQ Water have combined to offer the Africa market a game changing reverse osmosis (RO) technology solution able to truly unlock the significant potential of resin chemistry for effective mine effluent treatment, Vincent Ridgard, Process Engineer at Multotec Process Equipment, says.

Treating effluent on mines often makes use of RO technology, Multotec says, but low recoveries can raise costs substantially. A continuous counter current ion exchange can provide a fit-for-purpose solution, according to Ridgard, who notes that RO was initially designed to remove monovalent salt molecules from sea water.

“However, wastewater on mines also includes divalent and trivalent elements, which cause scaling of membranes in RO systems,” he says. “This means that when a standalone RO plant is utilised to treat these waters, it is operated at lower recoveries to enhance the lifespan of the membranes.”

This results in large volumes of highly concentrated brine streams, he says, which are either recirculated within the system or require very expensive effluent treatment systems. To address these challenges, Multotec offers niche technologies suited to treat divalent and trivalent elements in water on mines.

“Through our close partnership with Clean TeQ Water, in Australia, we offer mines across Africa a continuous counter current ion exchange technology,” Ridgard says. “This uses resin, which is more selective to extracting larger molecules.”

As a result, these systems achieve high recoveries of over 90%, so process water can be re-used within the mine’s process circuits or discharged safely to the environment. The resin-based chemistry removes target species, selectively extracting contaminants through exchanging ionic functional groups engineered on the resin beads.

Ridgard notes that, while these scientific principles are well accepted, there has previously not been a suitable technology to truly unlock the significant potential of resin chemistry. Clean TeQ’s ‘moving bed’ solution – supplied to the Africa market by Multotec – is, therefore, a game changer.

In contrast to the conventional fixed-bed systems, the use of resin transfer mechanisms allows the continuous ionic filtration to handle up to 150 parts per million of solids, whereas conventional systems need a 100% clean liquor. Total suspended solids and total dissolved solids can, therefore, be simultaneously removed.

It also optimises the inventory of resin, a significant cost contributor to the overall plant, and provides high water recoveries. Other benefits include its low power consumption and ability to recover valuable trace metals as a by-product.