Solução de atualização de peças de desgaste de moinho de torre vertical VTM: Melhorando a resistência ao desgaste e reduzindo custos de manutenção com tecnologia de camada protetora de cerâmica

1. Visão geral do projeto

Este caso apresenta a pesquisa e o desenvolvimento de uma solução de otimização de componentes compósitos cerâmicos resistentes ao desgaste, projetada especificamente para condições operacionais altamente abrasivas de equipamentos VTM (Moinho de Torre Vertical).

Os moinhos de torre verticais VTM são amplamente utilizados na fase de moagem fina das operações de mineração. Os componentes de desgaste interno estão continuamente sujeitos à erosão da lama, ao impacto do meio de moagem e ao atrito de alta frequência durante a operação. Sob condições de produção contínua, as peças de desgaste metálicas tradicionais geralmente enfrentam desafios comuns da indústria, incluindo rápido desgaste da superfície de trabalho, rápida redução da espessura efetiva do desgaste e intervalos de manutenção reduzidos.

Para enfrentar os severos desafios de desgaste dos componentes de desgaste do moinho de torre VTM, a Haitian Heavy Industry realizou pesquisas técnicas e desenvolvimento de soluções, propondo uma estrutura física composta otimizada que consiste em uma camada protetora de cerâmica combinada com uma estrutura de suporte de base metálica.

Ao incorporar fisicamente materiais cerâmicos de alta dureza na superfície do substrato metálico resistente ao desgaste, a camada cerâmica fornece a função primária de proteção contra desgaste, enquanto a matriz metálica garante suporte estrutural e resistência ao impacto. Este projeto melhora de forma abrangente o desempenho geral de áreas críticas de desgaste e supera as limitações dos componentes convencionais resistentes ao desgaste.

2. Desafios operacionais iniciais

Com base nas características operacionais industriais de longo prazo dos moinhos de torre verticais VTM, os componentes de desgaste metálicos tradicionais enfrentam principalmente três principais limitações de desempenho:

1. O desgaste contínuo da superfície limita a vida útil

Durante a operação contínua dos moinhos de torre VTM, os materiais em pasta e os meios de moagem impactam e corroem constantemente as superfícies dos componentes de desgaste. Durante longos períodos de operação, a taxa de desgaste da superfície de trabalho continua a aumentar, enquanto a camada de desgaste efetiva diminui gradualmente.

As áreas de alta carga podem atingir o limite de substituição mais cedo do que outras seções, encurtando diretamente os ciclos de manutenção e afetando a eficiência contínua da produção.

2. Limitações de materiais metálicos únicos em condições de alto desgaste

Materiais tradicionais resistentes ao desgaste, como ferro fundido com alto teor de cromo e ligas de aço, proporcionam boa resistência estrutural e propriedades mecânicas gerais. No entanto, sob condições severas de moagem fina em aplicações de mineração, esses materiais enfrentam erosão contínua por lama e desgaste de partículas abrasivas de alta frequência.

A resistência ao desgaste de materiais monometálicos tem limitações inerentes, tornando difícil melhorar ainda mais o desempenho do serviço sob condições operacionais extremas.

3. A manutenção frequente aumenta os custos de produção e reduz a eficiência

O desgaste rápido e os ciclos curtos de substituição de peças de desgaste tradicionais resultam em maior tempo de inatividade do equipamento, períodos de manutenção mais longos e custos mais elevados para substituição de peças sobressalentes e operações de manutenção.

Esses fatores afetam indiretamente a produtividade geral e a estabilidade das operações de moagem de mineração.

3. Operating Condition Analysis and Technical Evaluation

A comprehensive analysis was conducted based on the operating characteristics and wear mechanisms of VTM tower mills.

The evaluation focused on five key aspects:

• Wear distribution characteristics of equipment components

• Failure modes of existing metal wear parts

• Slurry erosion intensity

• Impact loads from grinding media

• Fundamental mechanisms of material wear

Through detailed operating condition analysis, it was confirmed that the primary failure mechanisms of VTM tower mill wear parts are abrasive wear on the surface and slurry erosion wear.

Therefore, enhancing surface wear protection capability and optimizing the wear-resistant surface structure became the key development direction for extending service life and improving equipment operating stability.

4. Technical Optimization Solution

Based on the operating challenges and technical evaluation results, Haitian Heavy Industry selected a physically embedded ceramic composite structure as the core technology route for upgrading VTM tower mill wear components.

Unlike ceramic-metal integrated casting processes, this solution adopts a layered structural design to achieve optimal performance matching between different materials.

1. Ceramic Protective Layer + Metal Matrix Composite Structure

The developed solution adopts a physically embedded composite structure, allowing different layers to perform their specific functions and achieving improvements in both wear resistance and structural stability.

Ceramic Wear-Resistant Protective Layer

A high-hardness ceramic material with a Mohs hardness of 9 is used as the core working surface.

The ceramic layer is designed to withstand slurry erosion and abrasive particle wear, significantly reducing surface material loss and effectively improving the rapid wear problem of traditional components.

Metal Support Matrix

The traditional metal base structure is retained to provide overall mechanical support and impact resistance.

The metal matrix ensures installation accuracy and operational stability, avoiding the brittleness and fracture risks commonly associated with pure ceramic structures.

This optimized design does not require major changes to the original component structure. By embedding high-performance ceramic materials into the critical wear surface, the wear performance can be upgraded accurately with higher adaptability and stronger implementation feasibility.

2. Targeted Reinforcement of Critical Wear Areas

According to the different wear intensity distributions inside the VTM tower mill, differentiated reinforcement designs are applied.

High-wear areas are specifically reinforced with ceramic protection layers. The arrangement and coverage of ceramic modules are optimized to improve utilization efficiency of the effective wear protection area, avoid unnecessary material usage, and eliminate weak protection zones.

This enables a more precise and efficient wear-resistant structure design.

5. Performance Design Targets and Expected Results

Based on structural optimization design, material performance testing data, and operating condition simulation analysis, the expected improvements of the ceramic composite wear-resistant solution are shown below:

Overall, this ceramic composite wear-resistant solution is expected to effectively reduce the wear rate of key VTM tower mill components, extend replacement intervals, reduce unplanned downtime, and provide technical support for cost reduction and efficiency improvement in mining operations.

6. Manufacturing Process Assurance

During the research and trial production process of the ceramic composite wear components, Haitian Heavy Industry focused on key manufacturing control points to ensure product quality and performance stability.

Four major areas were strictly controlled:

• Ceramic embedding and assembly accuracy

• Bonding stability between ceramic and metal matrix

• Overall dimensional consistency

• Raw material and finished product performance inspection

Relying on mature casting technology and advanced 3D sand printing technology, Haitian Heavy Industry can efficiently complete the development, structural optimization, and performance improvement of complex wear components.

This ensures high design accuracy and the feasibility of future mass production.

7. Solution Value and Application Areas

The VTM tower mill ceramic composite wear component upgrade solution is mainly applicable to:

• Copper ore beneficiation

• Gold ore fine grinding

• Iron ore processing

• Various highly abrasive mineral processing applications

The core value of this technology focuses on four optimization objectives:

• Effectively reducing wear rates in critical equipment areas

• Significantly extending wear part replacement cycles

• Reducing unplanned equipment downtime

• Continuously lowering operating and maintenance costs in mining grinding processes

This technology provides a new solution for upgrading tower mill wear components under severe abrasive conditions.

8. Key Engineering Experience Summary

The performance upgrade of VTM tower mill wear components is not simply achieved by increasing material hardness.

It requires a systematic engineering approach integrating:

• Wear mechanism analysis

• Material performance matching

• Structural optimization design

• Manufacturing process control

• Real operating condition adaptation

Through ceramic protective layer composite technology and refined wear structure optimization, this solution overcomes the performance limitations of traditional metal wear parts and establishes a technical foundation for future upgrades and application optimization of high-performance VTM tower mill wear components.

Haitian Heavy Industry will continue focusing on material improvement and structural innovation, continuously advancing wear-resistant technology to support the mining industry in achieving longer equipment operating cycles, higher production stability, and lower maintenance costs.