Mineral concentration specialists

GCA has provided concentration equipment and services to the world’s largest mining companies and project management firms for several decades. We offer the highest quality mineral concentration products and techniques to suit the specific needs and budget of our clientele.

Suppliers Of World-Leading Concentration Products


In 1976, Byron Knelson designed the first Knelson Concentrator and revolutionised the gravity concentration industry. Ever since, continuous R&D ensures that Knelson Concentrators, now owned by FLSmidth, continues to pioneer and dominate the gravity concentration industry.

The initial batch concentrator was and still is the best on the market at recovering free, or gravity recoverable gold (GRG), as well as other precious heavy metals. The continuous variable discharge (CVD) model allows recovery of everything from fine free gold to high specific gravity minerals such as tantalum, cassiterite, chromite and mineral sands; or the pre-concentration of sulphide minerals and the scavenging of tailings streams.

Consep Acacia

The Consep Acacia Reactor is a complete intense leaching plant that maximises the recovery of gold from gravity concentrates. Often used downstream from FLSmidth Knelson Concentrators, the Acacia produces the optimum solid-liquid interaction for maximised gold leaching kinetics by using an up flow fluidised reactor as opposed to complex mechanical agitation.

GCA is the official African agent for the Consep and has an abundance of experience in testing, commissioning and installing the machines.


FILTAWORX is a comprehensive range of fully automated, self-cleaning industrial water filters. The filters have a number of useful applications, in multiple industries, and are particularly helpful in African areas that have poor quality water. The easily replaceable screens range from 50 to 800 microns, and the extensive range of filters can handle between 25 and 900 cubic meters of water per hour in a single unit.

FILTAWORX filters are fantastic at ensuring better quality fluidisation water for FLSmidth Knelson Concentrators, as well as other mineral processors. The completely stainless steel filters can withstand the harshest corrosive environments, and minimise plant downtime in any mine, agricultural or industrial water filtration setting.

GCA is the official African agent of FILTAWORX.


Shaking tables are often chosen by smaller or cost-conscious gold mines for production of smeltable gold from gravity concentrates, where they are located downstream of FLSmidth Knelson Concentrators and APT GoldKachas. Shaking tables are also often used for primary concentration of gold and other heavy minerals from ores.

GCA is an accredited supplier of Gemini shaking tables, and is able to commission and install them on plants, in addition to supplying our own model of shaking table.


The Appropriate Process Technologies (APT) GoldKacha is an affordable and efficient gravity mineral concentrator, suited to small gold or heavy mineral plants. GoldKachas are simple and robust concentrators that achieve high recovery levels for both fine and course feeds using centrifugal force.

GCA is a registered agent and corporate affiliate of APT, selling and installing the concentrators on a regular basis.

ArmorCord™ safety pull cord

Used primarily as conveyor safety tripwires, ArmorCord™ provides a lifetime solution to any cabling or cord needs in any mining or industrial environment.

Rated nine times stronger than steel and 20 times more abrasion resistant than Kevlar, this heat, chemical and UV resistant safety cord is ideal for conveyor safety cords, offering an ‘install only once’ promise to plant managers – reducing maintenance downtime and eliminating weak points, breaks, frays and cut hands on the line. ArmorCord™ does not contract or expand as a result of cold/heat, further reducing downtime by eliminating nuisance trips.

Also kink and stretch free, ArmorCord™ is the only safety pull cord in the world that meets ANSI, IEC/EN and ISO international standards.

GCA is the official African agent of ArmorCord™.


GCA prides itself on customer satisfaction, and our staff is driven by our customers’ success. GCA operates a registered Knelson test facility and will conduct or manage mineral testwork on behalf of clients in order to better consult on concentration technology requirements., GCA’s spares department efficiently handles enquiries from throughout the African continent, and our support personnel travel from Cape to Cairo and Dakar to Djibouti to ensure that our satisfied customers remain as happy as they were on the day when they first commissioned our equipment.

  • Look after your customer and business will look after itself

    Byron Knelson



We do more than build projects — we build partnerships that help businesses grow.


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