nothing else, but quality
Corrosion-resistant electrowinning cells, cathodes, anodes and tankhouse infrastructure — engineered and manufactured in South Africa for the continent's harshest base metal refinery environments. Deployed across 15+ countries.
Electrowinning Cells · Insulator Blocks · Capping Boards · Electrode Spacers · Anode Buttons · Edge Strips · Cathodes · Lead Anodes · Demister Balls · Tankhouse Infrastructure | South Africa · Zambia · DRC Congo · Zimbabwe · Namibia · Tanzania · Mozambique
CSI Mining was established in 1993 to manufacture and supply acid and corrosion-resistant products to the Base Metal Refinery industry across Southern African and Sub-Saharan African markets.
We are the exclusive Sub-Saharan Africa representative for CTI International Technology, one of the world's leading innovators in electrowinning cell design. Using extensive testing and drawing on CTI's wealth of experience, CSI has manufactured and installed UNICELLS in multiple African countries.
CSI is led by Gary Prothero, Founder & Chairman — a 30-year industry expert — and Eric van Dieman, CEO, whose corporate leadership and MBA from Bond University Australia bring strategic depth to the business.
The patented UNICELL® is universally recognised as one of the great contemporary innovations in tankhouse technology. Over 40,000 UNICELLS are now in operation worldwide.
Every component engineered to withstand acid, corrosion and continuous base metal refining demands.
Polymer concrete UNICELLS in standard and custom configurations.
Core ProductHigh-purity stainless steel and titanium blank cathodes.
ElectrowinningLead-calcium and lead-silver alloy anodes for extended service life.
Electrowinning100,000+ manufactured. Acid-resistant polymer concrete blocks.
InfrastructureCustom fabricated polymer concrete acid baths and cells.
InfrastructureNon-slip acid-resistant flooring, walkways and stairways.
SafetyPP demister balls for acid mist suppression and edge strips.
ConsumablesFull installation, commissioning and maintenance across Africa.
ServicesCSI is led by a team whose combined experience spans three decades at the forefront of the global electrowinning industry.
With over 30 years of experience in the electrowinning industry, Gary is widely regarded as a subject matter expert in tankhouse operations and a respected leader across the African mining sector. He founded CSI in 1993 and has guided the company's growth from a South African manufacturer into a multi-country operation.
Eric brings extensive corporate leadership experience at the executive level and holds a prestigious MBA from Bond University, Australia. His strategic perspective and business acumen complement Gary's technical expertise — together forming a leadership team that positions CSI as a leading force in base metals and electrowinning solutions.
We strive for excellence in all our endeavours — from the most routine task to the largest project installation.
High standards of integrity in all our conduct. We say what we do and do what we say, every single time.
Our passion for what we do is evident in our attention to detail and our commitment to solving client challenges.
We believe people are key to success. Staff, customers and visitors are treated with utmost respect and kindness.
Get a no-obligation technical consultation and quote within 48 hours.
CSI Mining is a South African manufacturer of electrowinning cells, insulator blocks, capping boards, electrode spacers, anode buttons and edge strips, supplying base metal refineries across Africa since 1993. Our facility in Petit, Benoni, Gauteng produces acid-resistant, corrosion-proof components for copper, cobalt, zinc, nickel and lead electrowinning operations.
As the exclusive Sub-Saharan Africa partner for CTI International Technology, CSI manufactures the patented UNICELL® electrowinning cell — the world standard in polymer concrete tankhouse cells with over 40,000 units in operation globally. The UNICELL® monolithic construction eliminates cold joints and seams, dramatically reducing long-term maintenance costs for copper, cobalt and zinc SX-EW operations.
Our polymer concrete insulator blocks and capping boards are manufactured to exact dimensional tolerances for precise electrode spacing and bus-bar isolation. We also supply electrode spacers, anode insulator buttons, HDPE edge strips, stainless steel and titanium cathodes, lead-alloy anodes and polypropylene demister balls for a complete tankhouse consumables package.
UNICELL® cells, cathodes, insulator blocks and edge strips for SX-EW copper operations in South Africa, Zambia and DRC.
Custom cells and acid-resistant insulator blocks engineered for cobalt electrolyte chemistry in DRC Katanga Province operations.
Polymer concrete cells and capping boards for zinc tankhouse operations, designed for high-acidity zinc sulphate electrolytes.