Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together
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Liming Heavy Industry to Exhibit at Mining and Metals Central Asia 2026 15/9/2026
Liming Heavy Industry is pleased to announce its participation in Mining and Metals Central Asia 2026, taking place from September 16 to 18, 2026, in Almaty, Kazakhstan.
As one of Central Asiaβs established exhibitions for the mining and metallurgical industry, Mining and Metals Central Asia brings together equipment manufacturers, technology suppliers, mining companies, mineral processing enterprises and industry professionals from Kazakhstan and international markets. The 2026 event will be held at the Atakent IEC in Almaty.
During the exhibition, Liming Heavy Industry will meet with mining and aggregate producers, contractors, plant operators and industry professionals to discuss practical solutions for crushing and screening applications.
Our team will introduce a range of equipment and complete process solutions designed for different raw materials, production capacities and final product requirements.
Key equipment solutions include:
Jaw crushers for primary crushing
Cone crushers for secondary and tertiary crushing
Impact crushers for selected aggregate applications
Vibrating screens for efficient classification
Mobile crushing and screening plants for flexible production
Complete crushing and screening plant solutions
Choosing the right crushing equipment is not simply a matter of selecting a crusher model. The overall process needs to be considered based on raw material characteristics, feed size, required capacity, final product specifications and the operating conditions of the site.
A well-designed crushing and screening process can help improve production stability, reduce unnecessary circulation and minimize operating and maintenance costs.
At Mining and Metals Central Asia 2026, visitors can discuss their specific applications directly with the Liming Heavy Industry team, including:
Hard rock crushing
Iron ore and other mineral crushing
Aggregate production
Sand and manufactured sand production
Crushing and screening plant upgrades
Mobile crushing applications
Multi-stage crushing and screening processes
With extensive experience in crushing, screening and mineral processing applications, Liming Heavy Industry focuses not only on individual machines but also on complete production processes.
For each project, factors such as material properties, capacity requirements, feed and discharge sizes, equipment configuration and plant layout need to be evaluated together.
This project-based approach helps customers develop crushing and screening solutions that are better matched to actual production requirements.
If you are planning a new mining or aggregate project, upgrading an existing crushing line, or looking for suitable crushing and screening equipment, we welcome you to visit our booth.
π September 16β18, 2026
π Atakent IEC, Almaty, Kazakhstan
π’ Pavilion 11, Stand 324
π² Contact: Π‘Π°ΡΠ°
WhatsApp: +86 135 9883 0486
Bring your project requirements and discuss your application directly with our team.
We look forward to meeting mining and aggregate professionals from Kazakhstan, Central Asia and other international markets at Mining and Metals Central Asia 2026.
Mining Equipment Maintenance: 10 Ways to Reduce Downtime and Extend Equipment Service Life 10/9/2026
Mining and quarry equipment operates under heavy loads, abrasive materials, dust, vibration, and long working hours. Without a proper maintenance strategy, even a well-designed crushing plant can experience unexpected downtime, higher wear-part consumption, and rising operating costs.
For crushers, vibrating screens, feeders, and conveyors, preventive maintenance is usually more cost-effective than waiting for a major failure. A structured maintenance program helps identify problems early, maintain stable production, and extend equipment service life.
This guide covers 10 practical ways to improve mining equipment maintenance and reduce unplanned downtime.
Mining equipment maintenance is the regular inspection, servicing, adjustment, and replacement of components used in mining and quarrying equipment.
In a typical crushing and screening plant, maintenance may include:
Jaw crusher inspection and maintenance
Cone crusher lubrication and wear-part inspection
Vibrating screen maintenance
Feeder inspection
Conveyor belt and pulley maintenance
Bearing inspection
Hydraulic system maintenance
Electrical and control system inspection
Wear-part replacement
Cleaning and lubrication
The goal is not simply to repair equipment after it breaks. Effective maintenance focuses on preventing failures before they affect production.
Unexpected equipment failure can stop an entire production line.
For example, if a critical crusher stops operating, the downstream screening and conveying systems may also have to stop. The resulting loss is not limited to the cost of repairing the crusher. Production losses, labor costs, spare parts, and restart time can also increase the total cost.
Preventive maintenance helps mining operators:
Reduce unplanned downtime
Improve equipment availability
Extend component service life
Reduce emergency repair costs
Control spare-parts consumption
Maintain stable production capacity
Improve workplace safety
For high-capacity crushing plants, these benefits can have a significant impact on overall operating costs.
The first step is to create a clear inspection schedule for every major machine.
Daily inspections can focus on visible problems such as:
Oil leakage
Abnormal noise
Excessive vibration
Loose bolts
Damaged guards
Abnormal temperature
Conveyor belt deviation
Screen media damage
Weekly and monthly inspections can then cover components that require more detailed checks.
A written inspection checklist makes it easier for operators and maintenance teams to identify changes in equipment condition.
Crusher wear parts are directly exposed to abrasive material and gradually lose their original profile.
For jaw crushers, important wear components include jaw plates.
For cone crushers, operators should pay close attention to the mantle, bowl liner, and other wear components.
Continuing to operate with severely worn liners can affect:
Crushing efficiency
Product shape
Product size distribution
Energy consumption
Crusher capacity
Wear parts should therefore be inspected regularly and replaced according to actual operating conditions rather than waiting for a sudden failure.
Proper lubrication is essential for many mining machines.
Insufficient, contaminated, or unsuitable lubricant can accelerate component wear and increase operating temperature.
A lubrication maintenance program should include:
Checking lubricant levels
Using the recommended lubricant
Monitoring oil temperature
Checking for contamination
Inspecting oil lines and seals
Replacing lubricant at the appropriate intervals
For cone crushers and other equipment with sophisticated lubrication systems, operators should pay particular attention to abnormal oil pressure and temperature.
Bearings are critical components in crushers, vibrating screens, conveyors, and other rotating equipment.
Early signs of bearing problems may include:
Abnormal noise
Increased temperature
Excessive vibration
Lubricant leakage
Unusual movement
Ignoring these warning signs can result in more serious mechanical damage.
Regular inspection and correct lubrication can significantly reduce the risk of unexpected bearing failure.
Vibrating screens operate continuously under dynamic loads, making regular inspection particularly important.
Maintenance teams should inspect:
Screen media
Bearings
Springs
Side plates
Drive components
Bolted connections
Structural components
Loose bolts or damaged components can cause abnormal vibration and may eventually lead to more serious structural problems.
Screen media should also be replaced when wear begins to affect screening efficiency.
Equipment maintenance is not limited to mechanical inspection.
Incorrect feed conditions can also increase equipment wear.
For example, feeding a crusher with material larger than its recommended feed size can increase mechanical stress. Uneven feeding can also reduce crushing and screening efficiency.
A stable feed system helps maintain consistent operating conditions and can reduce unnecessary equipment stress.
This is why feeders, hoppers, and material distribution systems should be included in the overall maintenance program.
Conveyors often operate continuously for long periods, making small problems easy to overlook.
Regular conveyor inspection should include:
Belt condition
Belt alignment
Idlers
Pulleys
Bearings
Scrapers
Take-up systems
Drive units
A damaged or misaligned conveyor belt can cause material spillage, production interruptions, and additional maintenance work.
Early correction is generally much easier than repairing a major conveyor failure after production has stopped.
A maintenance strategy is incomplete without spare-parts planning.
Critical spare parts should be identified based on:
Equipment type
Operating hours
Material abrasiveness
Replacement frequency
Supplier lead time
Production importance
Common spare and wear parts may include jaw plates, cone crusher liners, screen media, conveyor components, bearings, belts, and lubrication-system components.
Keeping critical parts available can significantly reduce repair time when unexpected problems occur.
Maintenance decisions become more effective when they are based on actual operating data.
Useful information includes:
Operating hours
Production capacity
Motor current
Lubricant temperature
Bearing temperature
Vibration levels
Wear-part service life
Maintenance history
Failure frequency
Comparing current data with historical records can help identify abnormal trends before they become major problems.
For larger mining operations, condition monitoring and digital maintenance systems can further improve equipment management.
Operators are often the first people to notice changes in equipment performance.
They should know how to identify common warning signs such as:
Unusual vibration
Changes in machine noise
Increasing temperature
Reduced crushing capacity
Abnormal product size
Oil leakage
Increased power consumption
A small problem reported early may require only a simple adjustment or component replacement. The same problem ignored for several weeks could result in an extended shutdown.
Mining operations generally use two basic maintenance approaches.
| Maintenance Strategy | Main Characteristic | Typical Result |
|---|---|---|
| Reactive maintenance | Repair equipment after failure | Higher downtime and emergency repair costs |
| Preventive maintenance | Inspect and service equipment regularly | Better reliability and predictable maintenance |
| Condition-based maintenance | Maintain equipment based on actual condition | More targeted maintenance and better resource utilization |
For modern crushing and screening plants, preventive and condition-based maintenance can be combined to create a more efficient maintenance strategy.
Equipment maintenance has a direct relationship with the cost per tonne of production.
Poor maintenance can lead to:
More wear β More downtime β Lower output β Higher cost per tonne
A well-maintained plant can work toward:
Regular inspection β Early problem detection β Stable operation β Higher availability β Lower operating cost
This does not mean every component should simply be replaced as early as possible. Over-maintenance can also increase costs.
The objective is to find the right balance between equipment condition, component service life, production requirements, and maintenance cost.
A basic crushing plant maintenance checklist can include:
Daily
Check oil and hydraulic systems
Inspect for leakage
Check abnormal noise and vibration
Inspect belts and guards
Check screen media
Remove accumulated material around equipment
Weekly
Inspect bolts and structural components
Check bearings
Inspect conveyor components
Check feeder condition
Review equipment operating data
Monthly
Inspect crusher wear parts
Check lubrication system condition
Inspect screen structure and drive components
Review spare-parts inventory
Analyze maintenance records
The exact maintenance interval should always follow the equipment manufacturer's recommendations and the actual working conditions.
Reducing downtime requires more than repairing equipment quickly.
A better strategy is to combine:
Proper equipment selection + correct installation + stable operation + preventive maintenance + spare-parts management
Equipment should be selected according to the material characteristics and required production capacity from the beginning.
For example, highly abrasive granite, hard iron ore, and wet sticky materials can require different equipment configurations and maintenance strategies.
The better the equipment matches the application, the easier it is to maintain stable production over the long term.
Maintenance requirements should be considered during the plant design stage.
A well-designed crushing plant should provide reasonable access for:
Wear-part replacement
Lubrication
Inspection
Equipment cleaning
Maintenance tools
Component removal
Easy maintenance access can reduce service time and improve overall equipment availability.
For large mining and aggregate projects, maintenance planning should therefore be considered together with capacity, equipment selection, material flow, and plant layout.
The maintenance interval depends on the equipment type, operating hours, material characteristics, and working environment. Daily inspections should generally be combined with scheduled weekly, monthly, and periodic maintenance.
There is no single component that is most important for every crusher. Lubrication, wear-part condition, bearings, feed conditions, and operating parameters all have a major influence on crusher performance and service life.
Regular inspections, proper lubrication, timely wear-part replacement, stable feeding, condition monitoring, and sufficient spare-parts inventory can help reduce unplanned crusher downtime.
Wear parts should be replaced when their condition begins to affect crushing performance, product quality, capacity, or safe operation. The replacement interval varies according to material abrasiveness, feed characteristics, operating hours, and crusher settings.
In many mining applications, preventive maintenance can reduce the risk and cost of major failures. It also makes maintenance work more predictable and helps minimize production interruptions.
Mining equipment maintenance is a key part of achieving stable and cost-effective production.
Regular inspection, proper lubrication, wear-part management, bearing monitoring, conveyor maintenance, spare-parts planning, and operator training can all help reduce unplanned downtime and extend equipment service life.
For a complete crushing and screening plant, maintenance should not be treated as an isolated activity. Equipment selection, plant design, operating conditions, maintenance access, and spare-parts planning should work together from the beginning.
The goal is simple: keep the equipment running reliably, maintain the required production capacity, and control the cost of every tonne produced.
How to Choose the Right Vibrating Screen for Mining and Aggregate Production 3/9/2026
In a modern mining or aggregate production plant, crushing is only part of the process. Efficient screening is equally important because it determines whether crushed material can be separated into the required product sizes and whether oversize material can be returned to the crusher for further processing.
Choosing the right vibrating screen can improve screening efficiency, reduce circulating load, control product quality, and lower operating and maintenance costs. However, screen selection should not be based on capacity alone. Feed size, material characteristics, moisture content, required product sizes, deck configuration, and plant layout all need to be considered.
A vibrating screen is a screening machine used to separate crushed or processed material according to particle size. It uses vibration to move material across a screening surface while particles smaller than the screen openings pass through.
Depending on the application, vibrating screens can be used for:
Aggregate classification
Quarry screening
Mining ore processing
Sand and gravel production
Construction waste recycling
Manufactured sand production
Final product screening
Closed-circuit crushing
A typical crushing and screening plant may use a vibrating screen after the primary or secondary crusher to separate different sizes of aggregate.
The screening stage has a direct impact on the performance of the entire crushing circuit.
Customers often require specific aggregate sizes for concrete, asphalt, road construction, or other applications. A properly selected screen helps produce consistent final products.
In a closed-circuit crushing plant, oversize material can be returned to the crusher while qualified material moves to the next stage or stockpile.
This prevents unnecessary crushing and helps the crusher operate within its intended range.
Efficient screening reduces the amount of material that needs to be processed repeatedly. This can lower power consumption, wear on crushers, and unnecessary material circulation.
An undersized or incorrectly configured screen can become a bottleneck even when the crushers have sufficient capacity. Proper screening equipment helps maintain a balanced production line.
Different screening applications require different screen configurations.
Circular vibrating screens are widely used in aggregate and mining applications. They are suitable for screening a wide range of materials and are commonly installed after jaw crushers, cone crushers, and impact crushers.
They are particularly suitable for:
Quarry aggregate production
Limestone crushing
Granite processing
River stone crushing
Large-scale screening
Linear vibrating screens move material in a relatively straight-line motion. They are commonly used when accurate separation and high screening efficiency are required.
Typical applications include:
Mining operations
Sand and gravel processing
Fine material screening
Industrial mineral processing
A multi-deck screen contains several screening surfaces, allowing multiple product sizes to be separated simultaneously.
For example, one screen may produce:
0β5 mm
5β12 mm
12β19 mm
19β32 mm
The exact product sizes depend on the screen configuration and customer requirements.
Multi-deck screens are particularly useful when a plant needs several finished products from a single screening stage.
There is no single screen that is suitable for every project. The following factors should be evaluated before selecting equipment.
The first consideration is the amount of material that needs to be screened.
Capacity is usually expressed in tonnes per hour (TPH). A screen designed for 300 TPH, for example, may not be suitable for a plant requiring 600 TPH.
However, the actual screening capacity also depends on:
Feed particle size
Material density
Moisture
Screen opening
Deck area
Material shape
Screening efficiency
Therefore, simply matching the screen's nominal capacity with the plant's production target may not be enough.
The maximum feed size affects the selection of screen structure and screen media.
Large rocks can create impact loads and may damage unsuitable screening equipment. In many crushing circuits, the material should first be reduced to an appropriate size before entering the final screening stage.
For this reason, the screen should always be selected together with the crushers and feeders in the complete production line.
Different materials behave differently during screening.
Hard and abrasive materials such as granite and iron ore can cause significant wear. Wet or sticky materials can cause screen openings to become blocked.
Important material characteristics include:
Hardness
Abrasiveness
Bulk density
Particle shape
Moisture content
Clay content
Fines content
These factors directly influence screen media selection and screening performance.
The number and size of final products determine the number of screen decks and screen opening sizes.
If a plant needs three finished aggregate sizes, a multi-deck screen may be more appropriate than a single-deck machine.
The screening process should therefore start with the customer's final product requirements rather than simply selecting equipment based on available models.
High capacity does not necessarily mean high screening efficiency.
If the screen does not separate material effectively, oversized particles may remain in the final product while excessive fines may continue circulating through the crushing circuit.
A good screening system should provide:
Stable material distribution
Appropriate vibration
Sufficient screening area
Correct screen inclination
Suitable screen media
Controlled feed rate
A typical aggregate crushing and screening circuit may follow this process:
Feeding β Primary Crushing β Secondary Crushing β Screening β Finished Products
In a closed circuit, oversize material from the screen can be returned to the crusher:
Crusher β Screen β Qualified Material β Finished Product
** β Oversize β Return to Crusher**
This arrangement allows the crushing plant to continuously produce material within the required size range.
The vibrating screen therefore plays an important role in controlling the overall balance between crushing and screening capacity.
Even a properly selected screen can lose efficiency if it is not operated correctly.
Uneven feeding can cause material accumulation on one side of the screen and reduce the effective screening area.
A properly designed feeder should distribute material evenly across the screen surface.
Screen media should match the material and application.
Common considerations include:
Wear resistance
Opening size
Material shape
Moisture conditions
Required screening accuracy
For highly abrasive materials, wear-resistant screening surfaces can help extend service life.
Wet or sticky material can block screen openings and significantly reduce screening efficiency.
Depending on the application, operators may need to optimize material moisture, screen configuration, or screening technology to reduce blinding.
Incorrect vibration can affect both capacity and separation efficiency.
Regular inspection should include:
Vibration condition
Bearings
Drive components
Springs
Screen media
Structural connections
Early detection of abnormal vibration can help prevent larger mechanical problems.
Possible causes include excessive feed rate, incorrect screen media, unsuitable vibration parameters, or excessive material moisture.
Screen openings can become blocked when processing wet, sticky, or clay-rich material.
If material is concentrated on one side of the screen, part of the screening area may remain underutilized.
Abnormal vibration may indicate problems with bearings, springs, structural components, or the drive system. It should be inspected promptly.
Highly abrasive materials can accelerate wear. Selecting appropriate screen media and maintaining proper feed conditions can help extend service life.
One of the most common mistakes is selecting a vibrating screen independently from the rest of the production line.
A crushing and screening plant is an integrated system. The capacity of the feeder, crusher, screen, conveyor, and stockpile system should be reasonably matched.
For example, if the crusher can produce 500 TPH but the screening system can effectively handle only 350 TPH, the screen may become the production bottleneck.
For this reason, equipment selection should consider the entire process flow rather than focusing on a single machine.
The right vibrating screen can make a significant difference to the efficiency and profitability of a mining or aggregate production plant.
When selecting a vibrating screen, consider capacity, maximum feed size, material characteristics, required product sizes, screening efficiency, moisture conditions, and maintenance requirements.
More importantly, the screen should be properly matched with the feeder, crushers, conveyors, and other equipment in the complete crushing and screening system.
A well-designed screening system can help improve product quality, reduce unnecessary circulation, extend equipment service life, and achieve more stable production.
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