1. PAINPOINT DRIVEN OPENING

Are you facing persistent bottlenecks in your gold recovery circuit? Inefficient primary crushing and grinding directly impact throughput, recovery rates, and operational costs. Common challenges with traditional comminution equipment include:

High Operational Downtime: Frequent liner changes and unplanned maintenance on primary crushers halt your entire milling circuit, costing thousands per hour in lost production.
Inconsistent Feed Size Reduction: Variable ore hardness leads to uneven particle size distribution from primary crushing, overloading your ball mills and reducing overall grinding efficiency.
Excessive Energy Consumption: Inefficient size reduction processes can consume over 50% of your site's power budget, with a significant portion wasted as heat and vibration rather than productive fracturing.
High Wear Part Costs: The abrasive nature of goldquartz ore leads to accelerated wear on hammers, liners, and dies, driving up your cost per ton for consumables.
Limited Scalability & Flexibility: Fixedconfiguration crushers struggle to adapt to changing ore body characteristics or increased throughput demands without major capital expenditure.

Is your operation sacrificing gold recovery due to inadequate primary size reduction? What if you could transform this bottleneck into a controlled, highefficiency process that elevates the performance of your entire processing plant?

2. PRODUCT OVERVIEW: HEAVYDUTY STAMP MILL FOR GOLD ORE PROCESSING

This heavyduty stamp mill is engineered as a robust primary crushing solution specifically for freemilling gold ores. It is designed to accept runofmine (ROM) material and deliver a consistent, coarse sand product ideal for secondary grinding via ball mills or direct leaching feed.

Operational Workflow:
1. Feed Intake: ROM ore (up to specified feed size) is delivered via conveyor or feed hopper into the stamp mill's mortar box.
2. Mechanical Percussion: A series of mechanically lifted, heavy weighted stamps (shoes) are sequentially dropped onto the ore bed within the mortar box.
3. Size Reduction & Liberation: The repeated impact fractures the quartz matrix, liberating coarse gold particles while reducing the ore to a target size of approximately 10 mesh to 20 mesh.
4. Slurry Discharge: Crushed material is continuously discharged with wash water as a slurry through a grated screen at the mortar box end, ready for further processing.

Application Scope & Limitations:
Ideal For: Freemilling gold ores, pilot plant operations, smalltomedium scale mining projects (150 TPH), and operations prioritizing mechanical simplicity and ease of maintenance.
Limitations: Not suitable for refractory ores requiring fine grinding for liberation. Efficiency decreases with high clay content or excessively wet feed. Requires a consistent mechanical power source.

3. CORE FEATURES

Modular Mortar Box Design | Technical Basis: Bolttogether highcarbon steel plate construction | Operational Benefit: Enables rapid replacement of individual wear plates versus replacing entire box assembly. Reduces liner change downtime by up to 65%. | ROI Impact: Lowers maintenance labor costs and extends major component life by containing wear to specific, replaceable sections.

Precision Camshaft & Lifter System | Technical Basis: Forged steel camshaft with inductionhardened lifters timed for sequential stamp drops | Operational Benefit: Ensures even load distribution across the motor and frame while providing consistent impact energy per stamp cycle. Minimizes vibrationinduced stress on foundations. | ROI Impact: Improves power transmission efficiency by an estimated 1215% compared to nonsequential designs, reducing kWh per ton crushed.

Interchangeable Stamp Shoes & Dies | Technical Basis: Cast manganese steel shoes with multiple wear surfaces; reversible dies | Operational Benefit: Operators can rotate or flip components to utilize all wear material before replacement. Standardized sizing allows for inventory reduction across multiple mill units. | ROI Impact: Maximizes consumable utilization, typically achieving a 3040% improvement in costperton for wear parts compared to nonreversible designs.

Integrated Water Injection Manifold | Technical Basis: Adjustable spray bars mounted along the mortar box length | Operational Benefit: Provides controlled dust suppression and facilitates slurry flow for consistent discharge. Prevents packing and ensures optimal screen washing. | ROI Impact: Improves downstream slurry handling consistency and reduces airborne silica dust levels, supporting compliance with operational health standards.

HeavyDuty Roller Bearing Assembly | Technical Basis: Sealed spherical roller bearings on main camshaft supports | Operational Benefit: Supports high radial loads from multiple stamps with minimal friction loss. Sealed design excludes grit and contaminants common in milling environments.| ROI Impact: Field data shows bearing service life extended by 23x over bushing designs, eliminating a frequent failure point and associated unplanned downtime.

Simplified Discharge Grizzly Screen | Technical Basis: Removable tapered grizzly bars made of abrasionresistant steel | Operational Benefit: Allows quick adjustment of final product size by changing bar spacing or replacing entire cartridgestyle screen assembly in under one hour.| ROI Impact: Provides operational flexibility to optimize feed for downstream processes without stopping the mill for prolonged modifications.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Basic Stamp Mill) | Our Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Liner Change Downtime | 1624 hours for full mortar box weld repair/rebuild| 6,000 hours (documented)| >100% improvement |
| Product Size Consistency (% within target range)| +/ 25% variation due to uneven wear/wash| +/ 15% variation maintained via controlled discharge| ~40% more consistent |

5.TECHNICAL SPECIFICATIONS

Model Range Capacity: Configurable from 1 Ton per Hour (TPH) pilot units up to highcapacity 50 TPH production modules.
Power Requirements: Dependent on model; typical range from 15 kW (20 HP) for small units up to 75 kW (100 HP) for large production mills operating on either electric motor or diesel drive options.
Material Specifications:
Frame & Structure: Fabricated heavyduty steel plate
Mortar Box Liners & Wear Plates: ASTM A128 Grade B4 Manganese Steel
Stamps/Shoes: HighChrome Cast Iron or Manganese Steel
Camshaft & Lifters: Forged Alloy Steel
Physical Dimensions (Example Model SM20 @ ~20 TPH):
Footprint Length x Width): Approximately .0m x .5m
Height (to top of frame): .8m
Approximate Dry Weight): ,500 kg
Environmental Operating Range: Designed for ambient temperatures from 10°C to +45°C; requires protection from direct precipitation if electrical components are exposed; suitable for altitudes up to ,000m above sea level with appropriate motor derating.

6\. APPLICATION SCENARIOS

SmallScale Hard Rock Mine Expansion Challenge:

A West African operation using manual crushing and hammer mills struggled with low throughput (<5 TPH) and poor gold liberation (~65%), limiting plant expansion plans.Solution:
Implementation of two parallel .0 TPH heavyduty stamp mills as the dedicated primary crushing circuit feeding an upgraded ball mill setup.Results:
Throughput increased reliably .0 TPH.Primary grind size optimized,facilitating improved cyanide leach kinetics.Gold recovery rates improved % within six months,paying back the capital investment in under months.

Pilot Plant & Bulk Sampling Operation Challenge:

An exploration company needed reliable,costeffective crushing produce tonnage samples from various zones its concession representative metallurgical testing but faced prohibitive costs using mobile contract crushers.Solution:
Deployment one modular .0 TPH stamp mill capable being relocated between test pads different ore types.Results:
Achieved consistent sample production tons per week variable ore hardness at fixed operating cost.Enabled generation accurate grade recovery data feasibility study without major infrastructure investment.

7\. COMMERCIAL CONSIDERATIONS

Equipment pricing tiers structured around throughput capacity drive configuration:

Tier Basic Production Unit includes core stamp mill frame,camshaft assembly,mortar box standard liners basic discharge grizzly.Power pack drive system typically quoted separately provide flexibility.Tier Advanced Package includes Tier plus integrated variable speed drive automated lubrication system spare wear part kit.Option Onsite Installation Commissioning Support available days technical supervision ensure operational readiness.Service Packages include scheduled preventive maintenance inspections remote technical support priority parts dispatch tiered response times.Financing Options available through partner institutions include equipment leasing structures term loans tailored project cash flow profiles typical terms years.

8\. FAQ

What maximum feed size your stamp mill accept?
Our largest production models accept ROM feed up mm diameter optimal performance achieved sizing feed below mm ensure proper chamber filling prevent excessive kickback.What downstream equipment typically paired with?
Stamp mills most effectively paired secondary grinding unit such ball mill regrind circuit produce finer floatation leach feed also used standalone produce coarse concentrate gravity recovery shaking tables spirals.How noise vibration levels managed?
The sequential drop design inherently reduces peak vibration compared gang drop mills foundation specifications provided require isolated concrete mass dampen transmitted forces noise enclosures available option.Can handle ore high clay content?
Moderate clay manageable increased water flush excessive clay cause packing reduce efficiency prescreening washing recommended highly weathered saprolitic material.What lead time major wear components like shoes liners?
We maintain strategic inventory key consumable items lead times standard manganese steel parts typically weeks exworks custom materials may require longer.Are spare parts interchangeable older mill models?
While engineered modern standards we offer retrofit kits adapt certain legacy models consultation required review existing drawings specifications.Does optional variable speed drive offer?
Variable speed allows operators adjust stamp cycle rate match ore characteristics hardness optimize product size energy use realtime valuable highly variable deposit geology