Vat leaching is a good option for the project owner to start at initial stage to save investment
Gold heap leaching is highly sensitive to ore characteristics. Even when the process design is sound, ore properties can control solution flow, gold recovery, leach time, and reagent consumption.
Ore grade directly affects the economic performance of heap leaching. Higher gold content generally improves project returns, but the form of the gold matters just as much.
If gold is finely disseminated or locked in sulfides, cyanide may not access it easily. Free-milling gold usually leaches faster and more completely than refractory gold.
Particle size has a major influence on heap permeability and gold extraction.
A balance is needed: ore should be crushed enough to expose gold, but not so much that the heap becomes compacted.
Permeability determines how well leach solution moves through the heap. Poorly permeable ores create channeling, ponding, and uneven extraction.
Ores with high clay content, slimes, or weak rock structure often drain poorly. Good heap leaching ores maintain open pathways for irrigation and aeration.
Clay-rich ores can severely reduce heap performance.
Problems include:
These ores often require agglomeration or special stacking methods to maintain heap stability and solution flow.
Ore mineralogy affects both gold liberation and cyanide consumption.
Some minerals can consume cyanide or oxygen, lowering recovery efficiency. For example:
Understanding mineralogical composition is essential for predicting leach response.
Not all non-gold minerals are inert. Some gangue minerals react with leach reagents and increase operating costs.
Highly reactive ores may cause:
Testing ore reactivity helps estimate real leaching costs before heap construction.
Initial moisture and pore structure affect how solution distributes through the heap.
Well-porous ores allow better wetting and more uniform irrigation. Dense ores or ores with low internal porosity may resist solution penetration, causing incomplete gold recovery.
Ore deposits are rarely uniform. Changes in hardness, clay content, sulfide content, or grade can cause major fluctuations in heap performance.
Blending different ore types and consistent feed control can help stabilize leaching behavior and avoid recovery losses.
Ore properties strongly determine heap leaching success. Grade, mineralogy, particle size, permeability, and clay content all influence recovery, reagent use, and leach kinetics. Careful ore characterization and test work are essential for designing an efficient gold heap leach operation.
A: The right process depends on your ore’s mineralogy, grade, particle size, and liberation characteristics — not on guesswork. The reliable way is to run laboratory and pilot tests first. These tests define whether flotation, gravity separation, magnetic separation, or leaching (or a combination) will deliver the best recovery and grade. We start every project with ore characterization and bench-scale tests, then scale up to pilot validation before committing to plant design — a testing-first approach that avoids costly process mistakes later.
A: Reagent selection depends on the mineral’s surface chemistry and the ore’s gangue composition. Collectors, frothers, depressants, and modifiers are chosen — and their dosages fine-tuned — through laboratory flotation tests on your actual ore sample, not from generic recipes. Over- or under-dosing both hurt recovery. Our metallurgical lab tests reagents on your ore to lock in the right combination and dosage before plant-scale operation, then re-optimizes during commissioning.
A: Heap leaching suits low-grade, high-tonnage ores — crushed ore is stacked and irrigated with a leaching solution, giving low capital and operating cost but slower, weather-dependent recovery. CIL (carbon-in-leach) and CIP (carbon-in-pulp) both use cyanide solution and activated carbon, but differ in where adsorption happens: CIL adds carbon during leaching, which suits clayey or high-fines ores; CIP adds carbon after leaching, which suits clean, free-filtering pulps. The choice comes down to ore type, grade, and throughput — we evaluate all three against your ore to recommend the most economical route.
A: Start by diagnosing where the loss occurs — usually in grinding, classification, or the separation stage itself. Common levers include: optimizing grind size for better liberation, upgrading to more efficient separation equipment (flotation cells, magnetic separators, spirals), automating control for steadier operation, and re-running metallurgical tests when the ore type changes. A structured audit plus targeted equipment or process upgrades typically recovers 2–5% more metal. We provide exactly this — process audits, equipment upgrades, and full EPC retrofits — to lift both recovery and grade.
Vat leaching is a good option for the project owner to start at initial stage to save investment
Spodumene and lepidolite are very important lithium bearing minerals and they are very easy to recover
The demand from the industry over the years has been for special graphite and carbon with increasingly tighter
Features: Compact layout, full process coverage, low investment cost, and fast deployment. Designed for Startups & Small Mines — Your flexible and efficient gold solution!
Raw Material: Sulfide Flotation Copper Tailings Metal Concentrate: Copper: 0.8%，Gold: 0.3 g/t，Silver: 5 g/t，Iron: 25%
Raw Ore: Alluvial Gold with Magnetite & Hematite (Typical Sierra Madre Deposit)
Raw Material: Spent gold leaching solution (cyanide-based) Gold Concentration in Solution 2-5 ppm
Raw Material: Petroleum Coke, Needle Coke, Pitch Binder Project Capacity: 50,000 Tons Per Annum
Raw Material: Quartz Ore Project Type: Equipment Supply & Installation Support
Raw Ore: Alluvial Gold Ore & Primary Hard Rock Gold Ore (Mixed Feed Capability) Feed Gold Grade: 1.2 – 3.5 g/t (variable)
Raw Ore: Mixed Type Gold Ore (Oxide & Sulfide) Gold Grade: 2.8 g/t Gold Recovery Rate: 92% (Post-Optimization)
Prominer can provide SF series self-priming flotation machine and XCF/KYF series pneumatic flotation cell
Single-cylinder hydraulic cone crusher have two series based on different cavity, S-cavity is designed
Prominer can design and provide the complete refinery and smelting system for gold CIL project
We can design and manufacture the mill relining machine (or called mill relining manipulator)
We can design and manufacture grate type ball mill for mineral primary grinding
Prominer can provide different kinds of thickeners include center driving thickener, peripheral traction thickener
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