In großen Bergbaubetrieben übernehmen Kreiselbrecher die kritische Aufgabe der primären Erzzerkleinerung und verarbeiten kontinuierlich große Erze mit hoher Härte. Derkonkaver Liner und MantelInnerhalb der Brechkammer sind sie ständig starken Stößen, Kompressionen und abrasivem Verschleiß ausgesetzt. Ihre Lebensdauer wirkt sich direkt auf die Stabilität der Ausrüstung, die Wartungshäufigkeit und die Gesamtbetriebskosten im Bergbau aus.

Aufgrund der Unterschiede in der Erzhärte, der Aufgabegröße, der Ausrüstungslast und den Produktionsbedingungen variieren die tatsächlichen Verschleißbereiche der Kreiselbrecherauskleidungen von Bergwerk zu Bergwerk. Bei einigen Vorgängen kommt es zu einem konzentrierten Verschleiß im unteren Bereich des konkaven Liners, während bei anderen ein stärkerer Verschleiß im mittleren Bereich oder in anderen spezifischen Bereichen auftreten kann. Daher kann die Verbesserung des Laufbuchsenverschleißes nicht auf einer standardmäßigen Materialaufrüstung beruhen, sondern erfordert ein individuelles Design, das auf den tatsächlichen Verschleißbedingungen basiert.

Basierend auf den Betriebsbedingungen des Kunden entwickelte Haitian Heavy Industry einGyratory Crusher Concave Liner mit eingebetteter verschleißfester Verstärkungstechnologie. Durch die Analyse des Verschleißzustands der verwendeten Auskleidungen werden hochleistungsfähige verschleißfeste Materialien präzise auf die Hauptverschleißbereiche aufgetragen, wodurch die Verschleißfestigkeit an kritischen Stellen verbessert und gleichzeitig die Gesamtkosten für die Modernisierung effektiv kontrolliert werden. Diese Lösung wurde erfolgreich auf a angewendetMetso PG50-65 Kreiselbrecherbei einem großen inländischen Bergbauprojekt.

1. Problem mit der Kundenausrüstung: Lokalisierter Liner-Verschleiß, der zu kurzen Austauschzyklen führt

Die Ausrüstung des Kunden arbeitet kontinuierlich in einer Umgebung zur Zerkleinerung von Erzen mit hoher Härte. Der Kreiselbrecher läuft über längere Zeiträume unter hoher Belastung. Die Untersuchung der verwendeten Originalauskleidungen ergab, dass der Verschleiß nicht über die gesamte Auskleidungsoberfläche gleichmäßig war, sondern sich auf bestimmte Bereiche mit hohem Verschleiß konzentrierte.

1. Starker Verschleiß im unteren Bereich des konkaven Liners

Nach dem Eintritt in die Brechkammer konzentrieren sich große Mengen an Aufprallkräften und Kompressionslasten im unteren Brechbereich, wodurch der untere Abschnitt der konkaven Auskleidung kontinuierlich starken Aufprall- und Abriebbedingungen ausgesetzt ist.

Nach längerem Betrieb kam es in diesem Bereich zu:

· Beschleunigter Verschleiß der Arbeitsfläche;
· Rapid reduction in local liner thickness;
· Changes in crushing chamber clearance, affecting equipment stability;
· Replacement of the complete liner set before reaching the overall service limit.

2. Full Use of High-End Materials Results in High Costs

Traditional solutions often upgrade the entire liner set by using higher-grade materials, such as high chromium alloys or other advanced wear-resistant materials. However, different areas of a gyratory crusher experience different levels of wear. Applying premium materials throughout the entire liner set leads to unnecessary material costs in low-wear areas and significantly increases purchasing expenses.

Therefore, Haitian provides a customized wear upgrade solution that strengthens the actual wear zones while balancing service life improvement and cost control.

2. Haitian Wear Upgrade Solution: Embedded Wear-Resistant Gyratory Crusher Concave Liner

To solve the customer's localized rapid wear problem, Haitian Heavy Industry did not simply increase the material grade of the entire liner. Instead, the company analyzed the actual wear condition of the used liners and developed a customized embedded wear-resistant gyratory crusher concave liner solution.

By accurately identifying the areas requiring reinforcement and applying high-performance wear-resistant materials only where they are needed, the solution improves the service life of critical areas while achieving an optimal balance between performance and cost.

This solution has been successfully applied to the Metso PG50-65 Kreiselbrecher used in a large mining project.

1. Determine Reinforcement Areas Based on Actual Wear Conditions

Haitian's technical team first inspected and analyzed the customer's used original liners, focusing on:

· Actual liner wear locations;
· Wear severity in different areas;
· Remaining liner thickness;
· Main ore impact zones;
· Equipment operating load and production conditions.

Through actual data analysis, the customer's main wear area was identified as the lowest section of the concave liner.

Based on this analysis, Haitian applied embedded wear-resistant reinforcement specifically in this area instead of upgrading the entire liner set.

For different mining conditions, the embedded reinforcement area can also be customized according to actual wear patterns, including:

· Lower concave high-wear areas;
· Middle concave impact areas;
· Other localized severe wear zones.

This enables true condition-based customization.

2. Embedded Wear-Resistant Structure Improves Critical Area Performance

Haitian Heavy Industry integrates high-performance wear-resistant materials into the main wear zones of the concave liner, allowing reinforced areas to achieve higher wear resistance and impact resistance.

Compared with traditional full-material upgrades, this design provides several advantages:

· High-performance materials are concentrated in the actual wear zones;
· Avoids unnecessary material upgrades in low-wear areas;
· Reduces overall upgrade costs;
· Extends the overall service cycle of the liner.

At the same time, the mantle continues to use a suitable conventional wear-resistant material based on the operating conditions, achieving a better balance between performance and cost.

3. Optimized Material Selection Balances Wear Resistance and Impact Strength

Gyratory crusher liners must not only resist continuous abrasive wear but also withstand repeated impact from large and hard rocks.

Simply increasing hardness may reduce toughness, causing problems such as cracking and material spalling during long-term heavy-duty operation.

Therefore, Haitian Heavy Industry optimizes material selection based on:

· Ore hardness and composition;
· Equipment operating conditions;
· Wear characteristics of different areas;
· Actual production load.

Combined with advanced casting technology and heat treatment processes, the reinforced areas achieve:

· Excellent wear resistance;
· Stable impact resistance;
· Superior structural stability.

4. Customized Manufacturing and Full Quality Control

Based on the confirmed product solution, Haitian Heavy Industry designs molds and manufactures liners according to the customer's equipment model and liner structure.

During production, strict control is applied to:

· Alloy chemical composition;
· Casting process parameters;
· Heat treatment procedures;
· Product dimensional accuracy.

After production, finished products undergo:

· Dimension inspection;
· Hardness testing;
· Material composition analysis.

These processes ensure stable bonding between the embedded reinforcement area and the main liner body, meeting the requirements of continuous mining operations.

5. Actual Application Results: Service Life Increased by More Than 2 Times

Field application results demonstrate that Haitian's embedded wear-resistant concave liner solution effectively improved the customer's original problem of localized rapid wear.

According to actual project data:

· Original standard liners required replacement after processing approximately 2 Millionen Tonnen Erz;

· After adopting Haitian's embedded wear-resistant solution, the liner completed approximately 4 million tons of crushing production before removal and inspection, while still maintaining remaining wear allowance;

· Based on current wear conditions, it is estimated that the liner can continue processing approximately 1 million additional tons of ore.

The overall service life increased to more than twice that of conventional liners.

6. Reduced Maintenance Costs and Improved Mining Efficiency

Compared with conventional high manganese steel liners, this solution increases product cost by approximately 20%–30%.

However, compared with full upgrades using high chromium alloys or titanium carbide-based materials, the embedded solution achieves a longer service life with a more reasonable investment.

By reducing liner replacement frequency, customers can effectively lower:

· Spare parts purchasing costs;
· Equipment downtime;
· Labor costs for maintenance;
· Production losses caused by shutdowns.

Ultimately, the solution improves equipment reliability and reduces overall mining operation costs.

3. Applicable Equipment and Product Range

Haitian Heavy Industry provides customized wear-resistant liner development and manufacturing services for major global gyratory crusher brands, including:

· Metso
· Sandvik
· FLSmidth

Core products include:

· Gyratory Crusher Concave Liner
· Gyratory Crusher Mantle
· Other gyratory crusher wear parts

Based on equipment models, ore characteristics, and actual liner wear conditions, Haitian provides customized solutions covering material optimization, structural design, and production manufacturing.

Projektzusammenfassung

Wear improvement for gyratory crusher liners is not simply a matter of increasing material grade. An effective solution requires comprehensive consideration of actual wear conditions, equipment operating environment, material performance, and cost requirements.

Durchwear analysis, precise reinforcement, material optimization, and customized manufacturing, Haitian Heavy Industry provides mining customers with more suitable gyratory crusher wear solutions.

With embedded wear-resistant concave liner technology, Haitian improves the service life of critical wear areas while controlling upgrade costs, helping mining companies reduce maintenance downtime, improve equipment stability, and achieve long-term, efficient, and continuous production.