In-depth Analysis of Wear-Resistant Liner Materials for Dual-Inlet and Dual-Outlet Ball Mill Coals Mills
2025-03-14
As a critical component of the core grinding equipment in thermal power plants, the double-inlet, double-outlet coal mill… Wear-resistant lining板 It directly affects the equipment's working efficiency and service life. This article will delve into the wear-resistant protective material technology of this specialized industrial equipment.
I. Equipment Characteristics and Operating Mechanism
This type of coal mill features a dual-channel feeding system, making it suitable for continuous grinding operations involving high-hardness coals (Mohs hardness > 4) and highly abrasive coal types. The mill's cylinder inner wall is uniquely designed with a double-wavy structure, which creates a step-like lifting effect during operation. This, combined with the parabolic motion trajectory of the steel ball cascade, effectively breaks down the material. The mill can achieve an average daily throughput of up to 2,000 tons.
II. Analysis of the Core Technology Behind Wear-Resistant Liners
Duma Machinery's alloy lining plates utilize an innovative composite process:
1. Substrate optimization: Based on high-carbon chromium-molybdenum steel (with a carbon content of 0.8–1.2%), precisely tailored proportions of microalloying elements such as vanadium and niobium are added.
2. Metal Reinforcement: Wear-resistant lining板 Adding other metallic elements effectively purifies grain boundaries and refines grain size.
3. Phase Transformation Control: By employing a three-stage gradient heat treatment process (quenching + double tempering), an optimized combination of MC-type carbides (hardness HV1800) and a martensitic matrix (hardness HRC58-62) is achieved.
4. Wear Resistance Verification: Bench tests show that, compared to conventional high-manganese steel liners, its wear resistance is improved by 2.3 times, while impact toughness is enhanced by 40%.
III. Comparison of Application Benefits
Under actual operating conditions (coal powder fineness R90 = 18%), this Wear-resistant lining板 Outstanding performance:
◎ Lifespan extended to 12,000–15,000 hours
◎ Coal-fired power consumption reduced by 0.8–1.2 kWh
◎ Annual maintenance frequency reduced from 6 to 2 times
◎ Equipment utilization rate increased to over 93%
This materials technology, which achieves a dramatic leap in macroscopic performance through microstructural control, has become a key breakthrough for thermal power generation companies looking to reduce costs and improve efficiency. When selecting lining plate suppliers, it is recommended to carefully review the material's metallographic inspection reports and industrial operating data to ensure the equipment can maintain stable, long-term operation.
Duma Machinery's main products include: mantle and concave liners, crushing walls, and distribution plates for cone crushers; jaw plates, side guards, and pressure bars for jaw crushers; lining plates for ball mills, autogenous mills, and other equipment; impact crusher hammers and impact plates; as well as hammer heads, screen bars, liner blocks, and other wear-resistant alloy steel components for metal shredders.