Gold Dressing Reagent

EarthGold – Eco‑Friendly Gold Leaching Reagent

A safer, greener, high‑performance alternative to sodium cyanide

EarthGold is an advanced, eco‑friendly gold leaching reagent designed to fully replace sodium cyanide without requiring any changes to existing equipment, infrastructure or cyanidation processes. It can be used directly in gold ore beneficiation and refining, delivering strong leaching performance while meeting modern environmental and safety expectations.

EarthGold enables mining operations to transition to a non‑cyanide, low‑toxicity extraction method that supports regulatory compliance, reduces risk, and improves operational sustainability.

Key Characteristics

  • 100% replacement for sodium cyanide – no process or equipment changes required
  • Environmentally safe – non‑combustible, non‑explosive, low toxicity
  • Compatible with all cyanide‑based gold extraction processes
  • Suitable for all gold ore types and a wide range of operational scales
  • Proven performance across global gold mining operations

Applications
EarthGold is suitable for a broad range of gold and silver extraction scenarios, including:

  • Oxidised ore
  • Primary ore
  • Sulphide ore
  • Electronic waste
  • Cyanide tailings
  • Gold concentrate heaps
  • Pool leaching
  • CIP (agitation leaching) processes

Product Advantages
High‑Tech Innovation
EarthGold is a high‑technology reagent capable of replacing sodium cyanide in gold beneficiation without compromising performance.

Low Toxicity & Environmentally Safe

  • Non‑combustible
  • Non‑explosive
  • No oxidising or radioactive risk
  • Classified as an ordinary chemical product
  • Significantly safer for workers and the environment

Stable Performance

  • Reduces interference from harmful elements such as arsenic and sulfur
  • Maintains consistent leaching efficiency across varying ore compositions

Strong Applicability

  • Suitable for heap leaching, pool leaching and CIP
  • Effective for both small‑scale and large‑scale operations
  • Particularly advantageous for large heap‑leach projects

High Leaching Rate

  • Efficiently leaches gold ions
  • Achieves faster and higher recovery rates than sodium cyanide

Faster Processing

  • Shorter heap‑leaching cycle
  • Faster gold recovery

Lower Operating Costs

  • Reduced expenditure on:
    • Procurement
    • Transport
    • Storage
    • Safety systems
    • Environmental protection infrastructure

Selective Adsorption

  • Activated carbon selectively adsorbs gold over copper
  • Improves separation efficiency and downstream processing

Easy to Use

  • Follows the same operational process as sodium cyanide
  • Simple to integrate and scale across existing operations

Easy to Transport

  • Classified as ordinary cargo
  • Transportable by air, sea, road or rail

Packaging & Specifications

  • Available in powdered or granulated form
  • Packed in double‑layer plastic bags (inner thick translucent liner + printed outer bag)
  • Net weight: ~25 kg per bag
  • 40 bags = 1 tonne
  • Packaging suitable for container loading and international transport

EarthGold 200

Our EarthGold 200 series GLR is a more environmentally-friendly, low toxicity gold and silver leaching solution compared to sodium cyanide.

ASIA’s Resources Connections-Vanture International launched its EarthGold GLR series to the market in 2015. Our company was formed in 2008 to provide the global mining industry with a cost-effective and efficient sourcing route of all major mining and mineral processing equipment, including consumables and materials.

We completed a study into available low toxic GLR compounds currently produced.  Independent sample testing in laboratories in China and Australia has been carried out. From this, a selection of the best performing GLRs were identified for promotion to the global market. The basis for selection was based on leaching rates, toxicity, pricing and application.  EG200X in our series of EarthGold GLRs ranks particularly highly in its wide-ranging applications.

EG200X is a low toxicity, low cyanide GLR. Its toxicity levels (LD50 ) are shown in the below table.

Acute oral toxicity test and classification for EarthGold GLR EG200X

Code LD50 value (mg/kg b.wt) GHS TDG WTO/Europe USA
EG200X 584 IV IV Harmful 2

Acute oral toxicity in LD50 value and classification criteria in 5 International organizations:

Classified GHS (mg/kg) TDG (mg/kg) Classified WTO and 200/33/EECs Classified in USA USA (mg/kg)
I-Danger, Fatal if swallowed  ＜5  ＜5 Very toxic ＜25 0-no toxic >15000
II-Danger, Fatal if swallowed  5～50  5～50 Toxic 25～200 1-actual no toxic  5000～15000
III-Danger, toxic if swallowed  50～300  50～300 Harmful 200～2000 2-light toxic  500～5000
IV-Warning, harmful if swallowed  300～2000 3-medium toxic  50～500
V-Warning, may be harmful if swallowed  2000～5000 4-high toxicity <50

GHS: Globally Harmonized System

Customer trial and batch process
ARC-Vanture JV offers new clients the opportunity to conduct trial tests using our most widely distributed EarthGold GLR. Gold use: EarthGold gold leaching reagent is suitable for most gold mine leaching applications and processes. It is an innovative lower toxicity product; Substitute for sodium cyanide: EarthGold replaces the use of sodium cyanide in gold leaching processes and its application is the same as that of sodium cyanide; Typical Dosage: Dosage of the GLR is similar to that of sodium cyanide. Rates of use vary with gold content in ore, pH value of the ore etc, but is in a range of 5.0～10.0/10,000 of the ore volume (500～1000g of reagent/tonne of ore). It also is useful to refer to the usage of sodium cyanide if it was used.

Samples to client and quoting to the client
ARC-Vanture JV can send our EarthGold GLR sample to clients to conduct their own mine laboratory test on their own ore types following our testing instructions. If the test proves successful on the client’s ore we can then proceed to quote a first order trial batch for the client. – Cost of sending the client a sample for testing will be free, dependent on the quantity of sample required. Generally, a 200 gram sample sent to the sample destination will be free but the client is requested to bear the cost of the freight. Normally, 100-200g is required for a laboratory test. The test methodology on the sample is the similar to that for cyanide leach testing.

Helpful information sought from client
Gold content of ore (g/t) – Chemical composition – Mine capacity (tph) – Process used eg: heap leaching, CIP/ CIL etc. – Current sodium cyanide consumption per month. This will allow us to provide a comparison of how much EarthGold reagent would be required. – Any other useful information ARC is committed to offering clients confidence and assurance the EarthGold GLR is an effective leaching solution and suitable for the site’s mineral ore type. The EarthGold GLR is tailored to meet the client’s ore leaching needs.

Operating Instructions

Ingredients
Contains sodium oxide, nitrogen, ammonium, calcium, iron and other trace components.

Product Form
Solid granules or powder, fully soluble in water.

Usage

  • Dissolve EarthGold in alkaline water at normal temperature
  • Add the solution to the slurry for gold leaching
  • For heap leaching, dosing and spraying can occur simultaneously
  • Pregnant and lean solutions can be recycled
  • Activated carbon is recommended for gold adsorption
  • Optimal leaching occurs at ambient temperatures above 10°C
  • Compatible with cyanide‑based extraction if required

Alkalinity

  • Maintain pH 10–12 using lime, caustic soda or similar
  • After ore is placed in the heap or pool, adjust return water to pH 11 ± 1

Dosage

  • Typical dosage: 0.5–1.0‰ (500–1000 g per tonne of ore)
  • Actual dosage depends on ore grade, composition and pH
  • Determine optimal concentration through site‑specific testing

Dosing Method

  • Fully dissolve in water before use
  • Dissolution is accelerated with agitation or flowing water
  • Add continuously to solution tanks or mixing systems

To enquire further about EarthGold contact:
ASIA’s Resource Connections Australia office: 0412 261 870 or email: yolanda@yolandatorrisi.com