Skip to main content
copper cementation

Copper Recovery from ARD

The World Stage

Copper is mined around the globe with millions of tonnes being produced annually. Utilizing technology that can increase overall recovery rates and lessen the environmental impact has significant value.

Global Copper Mines
Copper mines around the world.

 

Acid Rock Drainage is a reality for many mines producing copper. According to Miningfacts.org, sulphidic tailings are the discharge from the copper extraction process. These tailings are stored in large outdoor piles and acid rock drainage (ARD) occurs when the tailings are exposed to rain water and oxygen. The ARD water contains sulfuric acid as well as valuable dissolved copper leached from the tailings.

The GK Solution

Copper recovery from ARD can be achieved with simple chemistry and the technical advantages of the GK VIBRA-DRUM® . This vibratory drum can easily fit within an existing system and works by aggressively driving a mechanical and chemical process.

copper cementation
Copper cementation reaction.

 

Chemically the spontaneous reaction, called copper cementation, is achieved within the drum. Theoretically, for each kg of copper cemented, .088 kg of iron is consumed. However, in reality, iron consumption amounts to an average of 1.4 to as much as 3.2 kgs per kg of copper produced (Ref: Mineral Sciences Laborites article). Mechanically, the iron media in the VIBRA-DRUM® makes continual impacts (millions per minute, due to the intense vibratory action only GK equipment can achieve). This frees the copper plated onto the iron media into flakes which are suspended in the ARD water and discharged from the drum then recovered by filtration following the drum.

 

Iron media is added on a regular interval to sustain the chemical reaction and recovery of the copper. This process occurs continuously, and has resulted in upwards of a 90% copper recovery rate.

Final Word

The addition of the VIBRA-DRUM® equates to a significant increase in revenue from what before was a waste water stream. A full list of GK mining solutions is available at www.gkmining.com.

GK vibra-drum
VIBRA-DRUM®

 

View the article as a PDF here: Copper Recovery from ARD.

 

 

General Kinematics Corporation, incorporated in 1960, was established to market, design, and custom fabricate innovative vibratory equipment for the foundry, recycling, mining, and processing industries. Today the company continues as one of the world’s largest suppliers of vibratory processing equipment and has evolved into an industry-leading EPC firm. Headquartered in Crystal Lake, IL, General Kinematics has seven global locations providing engineering and support to a world-wide customer base. GK is a third generation, family-owned company and is ISO 9001 certified.

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Mining News

Copper being screened by a GK STM-SCREEN™

U.S. Department of Energy Adds Copper to its List of Critical Materials

Copper Added as a Critical Mineral In its latest assessment, The U.S. Department of Energy (DOE) added copper to its list of critical materials in the medium term due to projected demands as the U.S. shifts towards cleaner energy sources such as solar and wind. Copper’s addition to this list makes it eligible for government […]

Read More
General Kinematics Un-Coaler®

The UN-COALER® Explained

The UN-COALER® Activator / Feeder Explained General Kinematics UN-COALER® combines material activation and feeding into a single, compact, high-performance vibratory unit. Rather than face the bulk and expense of separate bin activator and feeder machines, the UN-COALER® combines activation and feeding functions into a single unit. And with far superior results.  Here are a few […]

Read More
Potash

Uses for Potash

What is Potash? The name “Potash” comes from how the substance originated. From the industrial era, potash was created from leaching wood ashes in a pot. During this time, the uses for potash ranged from manufacturing soap and glass to gunpowder. What is Potash? Potash is comprised of several inorganic compounds of potassium within a […]

Read More