What 12 Years of Aggregate Production in Ghana Can Teach Us

A long-running Leimeng crushing and screening line shows why process matching, maintenance and technical support matter

When evaluating an aggregate production line, the first questions often concern capacity, feed size and equipment price.

These factors are important, but they do not show how the line will perform after five, ten or more years of quarry operation.

A production line that achieves its target output during commissioning may still face rising wear costs, unstable product grading or frequent downtime as it ages. Long-term performance depends on more than the rated capacity of the crushers. It depends on how the complete process was designed, how well the machines were matched, and how the equipment has been operated and maintained.

In Ghana, West Africa, an aggregate production line supplied by Leimeng Group has been operating since 2014. By 2026, the project had accumulated approximately 12 years of production experience.

The line uses a PE jaw crusher, an S Series cone crusher and a YKJ vibrating screen. Its long service history provides a useful reference for quarry owners and project teams planning aggregate production in overseas markets.

Project Overview

The Ghana project was developed to produce aggregates for local roads, bridges, buildings and other construction applications.

Its main configuration includes:

Production stage	Equipment	Main function
Primary crushing	PE jaw crusher	Reduces large feed material for downstream crushing
Secondary and fine crushing	S Series cone crusher	Further reduces material and controls discharge
Screening	YKJ vibrating screen	Classifies finished aggregates into the required sizes
Line support	Steel structures and process layout	Maintains material flow between the main machines

The basic process is:

Feeding → Primary crushing → Secondary and fine crushing → Screening → Finished aggregates

This may appear to be a straightforward configuration. However, the value of the line comes from how the crushing and screening stages were matched to the material, production requirements and site conditions.

Why Long-Term Performance Matters

A production line should not be judged only by its first month of operation.

For a quarry operator, long-term performance affects:

• Annual production availability
• Wear-part consumption
• Energy use per tonne
• Maintenance labour
• Spare-parts inventory
• Finished-product consistency
• Unplanned shutdowns
• Cost per tonne

A poorly matched line may still operate, but the client may experience repeated bottlenecks or increasing operating costs.

For example, if the primary crusher produces an unstable feed, the cone crusher may experience load fluctuations. If the cone crusher discharge does not match the screen openings, the circulating load may increase. If the vibrating screen cannot handle the crusher output, the complete line may fail to reach its expected capacity.

Long-term stability begins with process design rather than equipment size alone.

Primary Crushing: Establishing a Stable Feed

The PE jaw crusher handles the first size-reduction stage.

Its role is to accept the raw feed and reduce it to a size that can be processed efficiently by the S Series cone crusher.

Primary crushing affects every stage that follows. If the discharge contains excessive oversized material or varies significantly, the secondary crusher may receive an unstable load.

This can lead to:

• Fluctuating crusher chamber levels
• Uneven power demand
• Increased wear
• Unstable downstream output
• Greater pressure on the screen and conveyors

Correct jaw crusher selection should consider the maximum feed size, feed grading, material hardness, abrasiveness and required capacity.

Feeding must also be controlled. Even a correctly sized jaw crusher may perform poorly if the feed is irregular or the chamber is repeatedly overloaded.

Secondary and Fine Crushing: Controlling the Downstream Process

The S Series cone crusher handles secondary and fine crushing.

Cone crushers use compression to reduce material between the mantle and concave. They are commonly used when a production line requires controlled size reduction, stable operation and practical wear performance.

The cone crushing stage influences:

• Final aggregate grading
• Amount of oversized material
• Circulating load
• Screen performance
• Wear-part consumption
• Total line output

Crusher chamber selection and the closed-side setting should match the raw material and required finished products.

If the discharge setting is too large, the screen may return excessive oversized material. If it is too small, the crusher may experience unnecessary load and reduced capacity.

The objective is not simply to produce the smallest possible discharge. It is to provide the screen with a suitable and consistent feed.

Screening: The Control Point of the Line

The YKJ vibrating screen separates the crushed material into the required aggregate sizes.

Screening is sometimes viewed as a supporting stage, but it controls both finished-product specifications and recirculation.

If screening efficiency falls, material that already meets the required size may remain in the oversized stream and return to the cone crusher. This creates unnecessary crushing, increases wear and raises circulating load.

A properly matched screen helps:

• Maintain finished-product grading
• Reduce unnecessary recirculation
• Balance crusher load
• Use the available screening area effectively
• Support stable material flow
• Prevent screening from becoming the capacity bottleneck

The screen must be selected according to feed grading, moisture content, required product sizes, crusher output and available installation space.

Why Has the Ghana Line Remained in Service for So Long?

No single factor can explain approximately 12 years of operation. Long-term performance usually comes from a combination of process design, equipment durability, maintenance and service support.

1. Process design based on local conditions

Stone properties differ between sites. Hardness, abrasiveness, moisture and feed size all influence how a material behaves during crushing and screening.

The Ghana line was configured according to its working conditions rather than using a standard equipment combination without site-specific adjustment.

2. Balanced equipment matching

The jaw crusher, cone crusher and vibrating screen must be compatible in capacity and product grading.

If one machine is significantly undersized, it becomes a bottleneck. If one machine is unnecessarily oversized, the project may carry higher investment and operating costs without gaining equivalent output.

Balanced matching helps keep the material moving steadily through the line.

3. Durable crushing and screening equipment

Aggregate equipment works under vibration, impact, dust and continuous material load.

Frame strength, crushing chamber design, bearing condition, wear-part quality and screen structure all influence equipment availability over time.

Durability does not mean that wear parts never need replacement. It means the core equipment can remain serviceable through planned inspection, maintenance and component replacement.

4. Wear-part planning

Jaw plates, cone liners and screen media are normal wear components.

Their condition affects output, product size and energy consumption. Waiting until a part fails can cause longer downtime and may affect other components.

A practical wear-management plan includes:

• Regular inspection
• Recording wear rates
• Monitoring crusher discharge
• Keeping critical spare parts available
• Replacing parts before they affect production
• Reviewing whether the wear pattern is even

This is especially important for overseas projects where urgent delivery of heavy spare parts may take time.

5. Operator training

Correct operation influences both production and equipment life.

Operators need to understand feeding control, crusher settings, lubrication, abnormal noise, vibration, screen condition and shutdown procedures.

Training helps the site team identify early warning signs before a small issue develops into a major failure.

6. Long-term technical support

Leimeng’s involvement in the Ghana project covered more than equipment manufacturing.

Support included:

• Process design
• Equipment production
• Logistics coordination
• On-site installation
• Commissioning
• Operator training
• Maintenance guidance

For an overseas project, access to technical support and spare-parts information can influence how quickly the client responds to operating problems.

Stable Operation Does Not Mean No Maintenance

A line with a 12-year operating history should not be described as requiring no repairs or experiencing no downtime unless detailed maintenance records prove that claim.

Crushers and screens contain wear parts, bearings, lubrication systems and other components that require regular attention.

Long-term stability means that maintenance can be planned, the core equipment remains usable and the line continues to support the client’s production needs.

A realistic maintenance programme should cover:

Daily checks

• Lubrication status
• Abnormal sound or vibration
• Material accumulation
• Belt tracking
• Fasteners and guards
• Crusher feed condition

Scheduled inspections

• Jaw plate wear
• Cone liner wear
• Crusher discharge setting
• Screen media condition
• Bearing temperature
• Structural connections
• Conveyor transfer points

Production records

• Hourly output
• Downtime
• Power consumption
• Wear-part replacement
• Finished-product grading
• Circulating load

These records help the client decide whether the line needs routine maintenance, component replacement or a process upgrade.

When Should an Older Aggregate Line Be Upgraded?

Age alone does not determine whether a line should be replaced.

An older line may remain economically useful if it can still meet production and product-quality requirements with manageable maintenance costs.

An upgrade should be considered when:

• Demand exceeds the original design capacity.
• A crusher or screen has become a recurring bottleneck.
• Wear cost per tonne is increasing.
• Finished-product specifications have changed.
• Unplanned downtime is becoming more frequent.
• Replacement parts are difficult to obtain.
• The existing control or dust-suppression system no longer meets site needs.
• The layout cannot support new production requirements.

The first step should be to identify the bottleneck. Replacing one crusher without reviewing the feeder, screen and conveyors may simply move the problem to another stage.

Lessons for Overseas Aggregate Projects

The Ghana case offers several practical lessons.

First, equipment selection should begin with the raw material and production target.

Second, a production line must be designed as a connected process rather than a group of independent machines.

Third, spare-parts planning and operator training are especially important for projects located far from the manufacturer.

Finally, the supplier’s role should continue beyond delivery. Installation, commissioning and maintenance support all influence long-term project performance.

Before designing an aggregate production line, clients should provide:

1. Raw material type
2. Maximum feed size
3. Material hardness and abrasiveness
4. Moisture content
5. Required capacity
6. Finished-product sizes
7. Expected operating hours
8. Site layout
9. Power conditions
10. Local maintenance and spare-parts conditions

The Real Measure of an Aggregate Line

The Ghana production line has remained in operation since 2014. Its approximately 12-year history illustrates the value of matched crushing and screening stages, durable equipment, planned maintenance and long-term support.

The real measure of an aggregate line is not only the output achieved during commissioning.

It is whether the process remains productive, maintainable and suitable for the client’s needs after years of operation.

Leimeng Group provides jaw crushers, cone crushers, vibrating screens and complete aggregate production line solutions based on raw material, capacity, finished-product requirements and site conditions.

For both new projects and existing-line upgrades, the objective is to build a process that can support stable production over the long term.

https://www.lmcrusher.com/
GUANGDONG LEIMENG INTELLIGENT EQUIPMENT GROUP CO.,LTD.