Tag Archives: Brock Hill

EnviroGold Global boosts environmental remediation, recovery capabilities with IP expansion

Base metals, Energy minerals, Environmental, Metallurgy, Mineral processing, Mining services, Precious metals, Sustainable mining, Water management, , , , , , , , ,

EnviroGold Global says it has expanded its IP portfolio by acquiring 20 patents and designs that relate to iron ore beneficiation, electrochemical oxidation and the removal and destruction of contaminants including cyanide, arsenic, mercury and selenium.

The CleanTech IP, as it is referred to, is comprised of 13 patents and seven design patents with active registrations in the United States, Australia, Canada, United Kingdom, Germany and Chile.

EnviroGold Global’s proprietary technology is being applied to the company’s Hellyer Tailings Project (pictured), in Tasmania, Australia, where independent analysis from the company’s flowsheet development partner, Core Resources, has demonstrated gold recovery rates in excess of 80% and silver recovery rates in excess of 90% for total project after-tax free cash flows of $350 million, it says.

The application of the company’s proprietary technology to the Hellyer tailings is expected result in the production of around 965,000 oz of gold-equivalent over an a circa-8 year project life through the liberation of precious metals, including gold and silver, and critical metals, including copper, lead and zinc.

The CleanTech IP also includes patents related to the removal of Per- and Polyfluoroalkyl Substances (PFAS) from mining and industrial effluents. Commonly referred to as “Forever Chemicals”, PFAS are rapidly emerging as contaminants of significant concern for the global mining industry, according to EnviroGold Global, with the US Environmental Protection Agency proposing the designation of two of the most widely used PFAS as hazardous substances under CERCLA or Superfund.

The company expects the CleanTech IP will significantly enhance its metal recovery and environmental remediation capabilities while facilitating future growth into direct lithium extraction, where the technology has demonstrated significant potential.

EnviroGold Chief Technology Officer, Brock Hill, said: “EnviroGold Global’s core identity is as a clean tech innovator focused on developing and commercialising IP, which can generate substantial profits for shareholders while solving social and environmental challenges. This expansion of EnviroGold Global’s IP portfolio advances our strategy significantly, enhancing the company’s technical foundations and opening new avenues for the development of high-value solutions for industry and society.”

EnviroGold to expand tailings remediation with patent application for proprietary electrochemical process

Environmental, Metallurgy, Mineral processing, Mining services, Precious metals, , , , , , ,

EnviroGold Global Ltd has filed a patent application for a proprietary electrochemical process designed to achieve advanced metal recoveries from refractory ores with reduced capital expenditure compared with industry-standard solutions, adding to the company’s suite of solutions for metal recovery and environmental remediation.

“We are very pleased with this development that we believe increases the value of our intellectual property portfolio and expands the company’s opportunities to remediate legacy tailings dumps.”, Dr Mark Thorpe, EnviroGold Global’s CEO, said. “The residual metals contained in tailings are commonly encapsulated in refractory ores and it is estimated that the value of precious metals currently locked up in tailings storage facilities and old mine sites exceeds $1 trillion, increasing by $20 billion per annum. Further, as the proportion of refractory gold reserves continues to increase globally, we believe the ability to achieve advanced metal recovery rates and attractive economics from the processing of refractory ores provides better environmental outcomes, expands the company’s addressable market and creates an enduring, competitive advantage.”

Commenting on the patent filing, EnviroGold Global’s Chief Technology Officer, Brock Hill, said: “Refractory ores resist conventional metal extraction due to an impervious mineral matrix surrounding super-fine metal particles. The complex processes required to significantly improve extraction from these ores can drive substantial increases in a project’s capital expenditure and operating expenditure, often rendering otherwise attractive resource recovery opportunities uneconomic. EnviroGold Global’s patent pending process is designed with advanced electrochemical technology to induce changes in the metal-bearing matrix and achieve superior metal recovery rates.”

This process, in conjunction with other proprietary solutions developed for the removal of environmental contaminants, including cyanide, allows EnviroGold Global to provide a compelling value proposition for mine site owners while reclaiming and recharging natural resources, ultimately positioning the company to actively increase its significant tailings reprocessing pipeline, it said.