1. PAINPOINT DRIVEN OPENING

Are you facing persistent bottlenecks in your gold recovery circuit? The limitations of conventional crushing and grinding can directly impact your bottom line. Consider these common operational challenges:
Low Recovery Rates on Sulphide Ores: Inefficient liberation of fine gold locked within sulphide matrices, leaving significant value in your tailings.
Excessive Downtime for Maintenance: Frequent liner changes, bearing failures, and unplanned stops in your comminution process halting entire processing lines.
High Operational Costs: Consuming excessive energy per ton of ore milled and requiring significant manpower for constant monitoring and adjustment.
Inconsistent Grind Size: Poor control over pulp density and discharge classification, leading to suboptimal cyanidation or gravity recovery performance downstream.
Scalability Limitations: Difficulty in costeffectively scaling operations from pilot plant to full production without major redesign.

How do you increase gold yield from complex ores while controlling milling costs and maximizing plant uptime? The solution lies in a precisionengineered, modernized stamp mill circuit.

2. PRODUCT OVERVIEW

This specification details our Premium Customized Stamp Mill Solution for gold mining operations. This is not a historical replica but a reengineered, heavyduty mechanized milling system designed for efficient ore liberation in both freemilling and complex sulphide applications.

Operational Workflow:
1. Controlled Feed: Sized ore (1/2") is continuously fed via vibratory feeder into the integrated feed hopper.
2. Precision Percussion: Hydraulically or mechanically actuated stamp heads deliver controlled, highimpact blows onto the ore bed within a durable mortar box.
3. Continuous Discharge & Classification: Pulverized material is washed through a perforated discharge screen via a regulated water flow, creating a slurry.
4. Slurry Management: The resultant slurry is channeled to downstream processes, such as shaking tables, centrifugal concentrators, or direct cyanidation leaching circuits.

Application Scope: Ideal for small to midscale operations (5500 TPD), pilot plants, toll milling, and processing highgrade vein material where selective milling is advantageous. Effective for both alluvial/eluvial and hard rock ores.

Key Limitations: Not designed as primary crusher for runofmine ore >6 inches. For very hightonnage operations (>1000 TPD), SAG/ball mill circuits may offer different economies of scale.

3. CORE FEATURES

Modular Frame Design | Technical Basis: Bolttogether, highcarbon steel Ibeam construction | Operational Benefit: Enables transport to remote sites and rapid onsite assembly without heavy welding. Simplifies future plant layout modifications. | ROI Impact: Reduces installation time by up to 40%, lowering initial capital deployment delay.

Tungsten Carbide Composite Liners | Technical Basis: Isostatically pressed carbide tiles bonded to steel backing plates in mortar box and stamp shoes | Operational Benefit: Provides extreme abrasion resistance against siliceous ores, maintaining critical grinding geometry. | ROI Impact: Extends liner service life 35x over manganese steel, directly reducing parts cost and downtime for changes.

Adjustable Camshaft & Lift Mechanism | Technical Basis: Variablethrow cam design with greaselubricated roller followers | Operational Benefit: Allows operators to finetamp stamp drop height (410 inches) and frequency (30100 drops/min) to match ore competency and target grind size. | ROI Impact: Optimizes energy use per ton crushed; field data shows a 1525% reduction in specific energy consumption versus fixedconfiguration systems.

Integrated Water Injection & Slurry Management | Technical Basis: Manifold with calibrated nozzles and adjustable flow controls integrated into the mortar box | Operational Benefit: Ensures consistent pulp density, prevents dust, and facilitates immediate transport of liberated gold particles to recovery units. | ROI Impact: Improves overall recovery efficiency by minimizing particle reagglomeration and shortcircuiting.

Centralized Grease Lubrication System | Technical Basis: Automated singlepoint system servicing all major bearings on the camshaft and guides | Operational Benefit: Eliminates manual greasing points, ensuring optimal bearing health and reducing contamination risk. | ROI Impact: Proven to reduce bearingrelated failures by over 60%, a major contributor to unplanned downtime.

HeavyDuty Classified Discharge Screens | Technical Basis: Interchangeable screen decks with wearresistant polyurethane or stainlesssteel apertures | Operational Benefit: Provides precise control over maximum particle size reporting to downstream processes. Allows quick change for different ore types. | ROI Impact: Protects downstream equipment (e.g., pump impellers) and enhances gravity concentration efficiency through better size classification.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Basic Stamp Mill) | Premium Customized Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Liner Life (Abrasive Ore) | 80 120 Hours (Manganese Steel) | 350 500 Hours (Tungsten Carbide) | +300% |
| Specific Energy Consumption| ~5 kWh/ton (estimated) | ~3.8 kWh/ton (fieldmeasured average) |24% |
| Mean Time Between Failure (Major Bearing) | ~750 Operating Hours| ~2000 Operating Hours| +167% |
| Grind Size Consistency (P80 Variation)| High (±15%) due to manual water/feed control| Low (±5%) with integrated controls| +66% Control |
| OnSite Assembly Time (for 5stamp unit)| 1014 Days| 68 Days|40% |

5.TECHNICAL SPECIFICATIONS

Capacity Range: Configurable from 1 to 20 stamps per battery; throughput from 0.5 TPH to over 20 TPH depending on ore hardness and configuration.
Power Requirements: Electric motor drive recommended. A standard 5stamp unit requires a 3050 HP motor (2237 kW), depending on cam throw setting.
Material Specifications: Primary frame ASTM A36 steel; Mortar Box Liner Options: Tungsten Carbide Composite or AR400 Steel; Stamp Shoes: HighChrome Cast Iron or Carbidefaced; Camshaft: Forged Alloy Steel.
Physical Dimensions (5Stamp Unit): Approx. Length: 3m x Width: 1.8m x Height: 2.2m (excluding feed hopper).
Environmental Operating Range: Designed for ambient temperatures from 20°C to +50°C; Enclosed lubrication system protects against high dust environments; Stainless steel contact parts available for highsalinity or corrosive conditions.

6\. APPLICATION SCENARIOS

Sulphide Gold Ore Processing Pilot Plant

Challenge:A pilot operation needed to liberate fine gold from arsenopyrite without overgrinding or resorting to excessively expensive fine milling technology for its bulk sample testing.
Solution:A customized threestamp mill battery was implemented with an aggressive cam profile and secondary discharge classification screen.
Results:Achieved target grind of P80 at150 microns consistently.Liberation analysis showed a92% exposure rate for gold particles,directly increasing cyanide leach recovery from70%to88%on the sulphide concentrate during testing.This validated the fullscale plant flow sheet.

Alluvial/Eluvial HighGrade Zone Production

Challenge:A smallscale mining cooperative was losing recoverable coarse gold (>100 mesh)in their rudimentary crushing setup due topoor impact forceand inadequate washing.
Solution:A heavyduty twostamp mill with integrated water sprayand direct discharge onto agold shaking tablewas installed as the sole liberation device.
Results:The system processed3TPHof alluvial gravel.Recovery of coarse,nuggetygold improved by an estimated35%,as confirmed by tailings audits.The simplicity ofthe system allowed operationby existing personnelwith minimal training.

7\. COMMERCIAL CONSIDERATIONS

Pricing is modular,based on the number of stampsand selected customization level:
• Tier I(Base Unit):Includes standard carbon steel frame,manganese steel liners,basic discharge.Suitablefor soft oresor demonstration purposes.
• Tier II(Performance Package):Includes tungsten carbide linersin key areas，adjustable camshaft,and centralized lubrication.Recommendedfor fulltime productionon abrasive ores。
• Tier III(Fully Customized):Includes all Tier II featuresplus full variablefrequency drive(VFD)motor control，stainlesssteel slurry pans，and automated feed control integration。

Optional Features:Dust enclosure kit，secondary slurry vibrating screen，spare parts kits，remote monitoring sensors。

Service Packages：Extended warranty(up to3years)，onsite commissioning supervision，annual preventative maintenance inspection contracts。

Financing：Equipment leasing optionsand project financing are available through partnered financial institutionsfor qualified buyers。

8\. FAQ

Q:What are the primary differences between this modern stamp milland historical designs?
A：Our design incorporates contemporary materials(tungsten carbide，polyurethane)，precision machined components(for balance&durability)，and engineered systems(centralized lube，integrated water control).This translates torepeatable performance，greatly reduced maintenance,and measurable efficiency gains over historical designs。

Q：Can this system be integrated into my existing circuit with aball millor crusher?
A：Yes.It often serves as an effective tertiary crusheror secondary grinder ahead offine milling.Precise integration points(feed size，slurry density）are determined during the application engineering phase。

Q：What is the expected operational noise level?
A：With enclosed framesand modern bearing housings,sound levels typically measure8288 dBAat one meter.This isoften lower than comparably sized jaw crusheror uncontrolled grinding operations。

Q：How operatorintensiveis this stamp mill solution?
A：Once setfor aspecific ore type,the system requires minimal daily intervention—primarily monitoring feed consistencyand lubrication levels.This design significantly reduces labor requirements comparedto manually managed traditional stamp mills。

Q：What kindof spare parts inventory should we planfor?
A：We recommend an initial spare parts kit containingwear items like diaphragm screens,gasket sets,and spare grease cartridges.Critical wear parts likecarbide liners have long lead times but extended service life；their inventory need is assessed based on your projected tonnage。

Q：Are these units suitablefor regionswith limited infrastructure？
A:The modular design allows transportvia standard containeror flatbed truck.They can be poweredby diesel generatorswhere grid poweris unavailable,making them suitablefor remote site development。