Mining Plant Construction & Turnkey Erection
Mining plant construction demands rigorous civil precision and specialized mechanical expertise. A slight misalignment in a 40-tonne ball mill or a defect in a 1,000 m³ leach tank foundation can cause catastrophic operational failure.
Our site teams comprise certified civil engineers, qualified coded welders, master riggers, and instrumentation specialists who execute every stage to procedure under ISO 9001 quality controls.
We handle all site logistics, concrete batching, heavy craneage, structural steel erection, slurry pipe fabrication, and pre-commissioning checks.
- EHS Safety Record
- Zero Lost Time (Strict ISO 18001 / OHSAS Adherence)
- Heavy Rigging Capacity
- Up to 100 Tonnes (Mobile Cranes & Precision Jacks)
- Welding Standards
- ASME IX Certified (100% NDT on Critical Slurry Lines)
- Turnkey Delivery
- EPC / EPCM (Civil, Mechanical & Electrical)
Visual Assets & Field Records — Mining Plant Construction & Turnkey Erection
Inspect high-resolution mechanical assemblies, 3D CAD flowsheets, on-site construction rigging, and diagnostic testing apparatus. Click any record to zoom up to 2.5x with full pixel clarity.
Ball Mill Lifting & Placement
Precision positioning and laser alignment of a heavy cylindrical grinding mill shell onto reinforced concrete dynamic foundation pedestals.
Drive Motor & Pinion Assembly
Mechanical engineers aligning the electric drive motor, reduction gearbox, and girth gear pinion on the operating plant plinth.
CIL Leach Tank Farm Erection
Civil and structural erection of circular leaching tanks, agitation baffle frames, and environmental containment bunding.
Substation & Power Infrastructure
High-voltage transformer installation, switchyard grounding grid, and main power distribution to heavy plant motors.
Technical Scope & Certified Deliverables
Civil & Foundation Works
- Reinforced Dynamic Machine PlinthsBS 8110 / ACI 318
Mass concrete foundation casting with vibration dampeners for primary ball mills and crushers.
- Secondary Containment & Bund WallsISO 14001 / NEMA
Impermeable chemical-resistant containment bunds designed to hold 110% of tank volume.
- Plant Civil Buildings & Gold RoomKPDA Security Specs
Reinforced masonry construction for motor control centers, laboratory, and high-security gold room.
Mechanical Assembly & Rigging
- Heavy Equipment Rigging & ErectionOSHA / BS 7121
Certified lift planning and dual-crane maneuvers for oversized mill shells and thickener tanks.
- Shaft Laser Alignment & BalancingISO 10816
Sub-millimeter optical and laser alignment of motor-gearbox-trunnion drive trains.
- Process Piping & Hydro-TestingASME B31.3
Full radiographic / ultrasonic NDT testing on pressurized slurry, air, and cyanide circuits.
Core Competency Register
- Site clearing, mass earthworks, terrace leveling and drainage formation
- Reinforced concrete dynamic foundations for vibrating crushers and ball mills
- Heavy structural steel fabrication, crane gantry erection and elevated walkways
- Carbon-in-Leach (CIL) and Carbon-in-Pulp (CIP) steel tank assembly and welding
- Mechanical alignment and laser leveling of rotary mills, gearboxes, and motors
- High-pressure slurry pipework, HDPE line fusion and chemical manifold fabrication
- Electrical substation installation, cable tray routing, MCC hookup and PLC wiring
- Non-destructive testing (NDT), hydro-testing, pre-commissioning and punch list closeout
Phase-by-Phase Execution Pathway
Mobilization & Site Establishment
Establish construction camp, security perimeters, batching plants, and temporary power.
- Site Execution Plan
- EHS Induction Records
- Survey Control Monuments
Civil & Foundation Construction
Excavate and cast reinforced concrete foundations for heavy mills, crushers, and CIL tank farm.
- Concrete Cube Test Reports
- Foundation Inspection Signoffs
- Earthworks Compaction Logs
Structural Steel & Mechanical Installation
Erect steel structures, place heavy process machinery, and weld tank shells and piping.
- Mechanical Alignment Reports
- Welding NDT Certificates
- Torque Audit Logs
Cold Commissioning & Dry Run
Energize electrical systems, test motor rotation, verify sensor loops, and clear punch list items.
- Motor Run Test Sheets
- Loop Check Dossier
- Pre-Commissioning Signoff
Design Criteria & Technical Parameters
| Engineering Parameter | Standard Design Criteria | Application & Notes |
|---|---|---|
| Concrete Compressive Strength (Plinths) | C35/45 with sulfate-resistant cement | Engineered for chemical resistance and dynamic loads |
| Mill Shaft Alignment Tolerance | < 0.05 mm radial & axial runout | Verified with dual-axis laser measurement |
| Tank Weld Quality Testing | 100% Visual + 20% Dye Penetrant & Radiography | Zero leakage tolerance on cyanide slurry tanks |
| Electrical Isolation Rating | IP65 on all outdoor field motor isolators | Dust and water jet resistant for mine environments |
Frequently Answered Engineering Questions
Does Green Ngoria manage its own construction workforce and heavy machinery?
Yes. We maintain qualified permanent staff for construction management, certified welding, electrical installation, and rigging, backed by company-owned logistics and partnering crane fleets.
How does Green Ngoria ensure construction safety on remote mining sites?
We enforce a zero-harm EHS policy, mandatory daily toolbox talks, certified lift plans for all crane maneuvers, hot-work permits, and continuous environmental monitoring under ISO 14001.
What is the typical timeframe for constructing a modular CIP/CIL gold plant?
Depending on throughput capacity (e.g. 100 – 500 tpd), construction and cold commissioning typically take between 4 to 8 months from civil foundation commencement.
Tell us what you need built, processed or supplied
Send the scope, quantities and delivery location and the enquiry reaches the right division. For an installed circuit, a technical plant assessment is the faster route.
Customer care & enquiries
Director lines & emails: Leadership Profiles →
Tatu City, Kijani Ridge, Nairobi, Kenya