HM X-leach

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The HM X-leach is a privately branded product under license to Mineworx by EnviroLeach Technologies Inc., who manufacture this patent-pending reagent. The HM X-leach is a cost-effective and eco-friendly alternative to the current toxic methods used in the hydrometallurgical extraction of precious metals in the mining and E-Waste sectors. The HM X-leach license allows Mineworx to use the HM X-leach in traditional mining by utilizing the Mineworx unique business model for smaller, high grade gold deposits, providing a solution for property owners experiencing permitting issues with respect to toxic cyanide leaching or seeking an environmentally-friendly alternative to cyanide.

Mineworx – EnviroLeach Joint Venture

Mineworx and EnviroLeach have entered into a Joint Venture for the ongoing collaboration in the E-Waste sector. The strategic relationship was created in an effort to capitalize on the assets and skill sets of both parties to develop an innovative, turn-key and environmentally friendly solution for E-Waste processing. Mineworx’s equity participation and ownership within the Joint Venture will be 20%. In return for its share in the joint venture, Mineworx will provide its engineering design and fabrication capabilities and also grant EnviroLeach an exclusive license to use the patent pending HM X-Mill technology in all E-Waste processing solutions globally.

The $140 Billion Gold mining and $65 Billion E-Waste (expected to grow 8% each year)  recycling industries are limited by the inherent toxicity of their processes, either by outright bans on toxic chemical use at certain sites, or the cost-prohibitive measures required to minimize environmental impact.

Precious Elements Extraction: Currently a Toxic, Yet Profitable Conundrum

Digging up ore containing precious metals is only one facet of the mining process. Once the ore is brought to the surface, valuable mineral content is hydrometallurgically extracted; however, the processes utilized today are quickly becoming less and less ideal due to a number of factors.

The Problem with Existing Extraction Processes

Conventional gold mining operations rely heavily on cyanide leaching as the predominant method for recovering gold from ores and concentrates – so heavily that 66,000 tons of sodium cyanide are used annually worldwide.

Cyanide has been the leach reagent of choice in gold mining because of its high gold recoveries, robustness and relatively low cost. As a result, over 76% of all gold extracted worldwide is produced by hydrometallurgical extraction with the use of cyanide.

However, cyanide and cyanide gas used in existing extraction solutions are highly toxic, necessitating extreme care during ore processing to avoid worker exposure. In addition, the use and subsequent disposal of cyanide present significant safety and environmental challenges. As a result, increasingly stringent safety, environmental and associated permitting issues are forcing the industry to seek out effective alternatives.

 X-Leach: Cyanide-Free Precious Metals Extraction


HM X-leach is a unique, cost-effective and eco-friendly alternative to the current toxic methods used in the hydrometallurgical extraction of precious metals in the mining and E-Waste sectors. HM X-leach is safe to handle and functions at low temperatures and near neutral pH levels. Unlike cyanide or acid methods of extraction, HM X-leach does not generate poisonous off-gasses. The base ingredients of the HM X-leach product are all FDA approved as nutritional supplements, medicines and food additives.


On-site extraction is now possible at locations formerly off-limits to cyanide processing, potentially opening entirely new mining opportunities. It’s hardly surprising that cyanide usage is being banned with a passionate fervor. Internationally, several countries, like the Czech Republic, Greece, Turkey, Germany, Hungary, Costa Rica, Argentina, Ecuador, and some states of the United States (e.g. Montana and Wisconsin)) have banned cyanide leach technology in gold and silver mining. It would be a reasonable conclusion to expect more and wider bans on cyanide use. Therefore an environmental friendly alternative is crucial for the continued development of the mining sector.

How Does X-Leach Work?

 The patent-pending (cyanide-free) reagent consists of a base formula of non-toxic dry ingredients which are mixed with water. The oxidant is uniquely generated and regenerated for re-use electrochemically.

10 Tonne per day E-Waste Leach Plant

The process is like a cyanide circuit but safer and simpler.  It involves the dissolution of the precious metals into the aqueous solution followed by extraction using conventional methods such as electrowinning, carbon absorption, or precipitation.  The operation is simple and does not require complex process circuits, intensive gas monitoring, elevated temperatures or costly detoxification systems.                                                                                                                                                            

The process is safe, eco-friendly and provides comparable leach kinetics to that of cyanide or acid based lixiviants on most ores, concentrates, tailings and E-Waste.  Effective recovery rates of precious metals are on par or better than cyanide or other procedures in use today.

HM X-leach Process Overview

The most widely-researched alternative lixiviants for gold ores are examined in following Comparative Matrix, but it is evident that none offers an effective alternative.

Value Proposition

Economic Benefits

  • Lower capital costs
  • No detoxification costs
  • Lower handling costs
  • Simplified permitting
  • Reusability of formula
  • Can be used in cyanide restricted areas
  • Drives value from high-grade E-waste

Process Benefits

  • Simple process
  • Broad operating ranges
  • Fast leach kinetics
  • Availability of Ingredient Scalable
  • Reusability of formula
  • Can be used in cyanide restricted areas
  • Broad material applicability
  • Safe to use, handle and transport

Environmental Benefits

  • Non-toxic
  • Environmentally friendly
  • Reduced Discharges
  • No Tailings Ponds
  • Reduced Urban Waste
  • Reduced Carbon Emissions
  • Reduced Environmental Impact