Product Category

　 　Product Highlights
　　1. Made from premium high-chromium cast iron and nickel‑hard cast iron, with a hardness of ≥HRC58–62, featuring uniformly dispersed carbides for superior impact resistance and wear performance.
　　2. Ceramic sand casting + CNC precision machining, flatness ≤ 0.5 mm, excellent interchangeability, ready to install upon arrival.
　　3. Compatible with mainstream medium-speed coal mills such as ZGM, HP, MPS, MBF, and MPH series, and supports customization based on customer-provided drawings.
　　 User Pain Points
　　The mill bowl liner is the core grinding component of a medium-speed coal mill and is used in conjunction with the grinding roller. Traditional mill bowl liners suffer from three major drawbacks: standard materials lack sufficient wear resistance, requiring frequent replacement and reducing operational availability; inadequate installation accuracy leads to increased equipment vibration and decreased grinding efficiency; and the failure modes of worn parts are unclear, preventing targeted improvements.
　　 Solution
　　Our company uses high-chromium cast iron or nickel‑hard cast iron for grinding mill liners, with a hardness of ≥HRC58–62. Combined with optimized heat treatment, this approach maintains high hardness while preserving sufficient toughness, effectively preventing brittle fracture and spalling. We employ ceramic sand casting followed by CNC precision machining to ensure dimensional accuracy and interchangeability. In addition, we offer failure analysis services for used components, providing operating condition reports and recommendations for improvement.
　 　I. Product Description
　　The mill plate liner is mounted on the mill bowl tray and used in pairs with the grinding roller. It features a sectional, bolted‑together design, allowing individual replacement of any damaged segment. Made from high‑chromium cast iron or nickel‑hard cast iron, it achieves a hardness of ≥HRC58–62 with uniformly dispersed carbides. It is widely applicable to mainstream medium‑speed coal mills, including ZGM, HP, MPS, MBF, and MPH series.
　　 II. Product Features and Advantages
　　• Premium wear-resistant materials: high-chromium cast iron or nickel-hard cast iron, with a hardness of ≥HRC58–62 and uniformly dispersed carbides, resulting in a significantly extended service life compared to standard products.
　　• Precision molding process: Ceramic sand casting ensures crisp contours and high dimensional accuracy. The sealing surfaces, locating holes, and arc‑shaped grinding surfaces are machined in a single setup on a CNC machining center, guaranteeing interchangeability and excellent roundness; flatness deviation is ≤0.5 mm.
　　• Optimized structural design: Variable cross-section thickness can be provided to ensure the optimal grinding angle is maintained throughout wear. Positioning bosses and countersunk holes, paired with specially designed anti-loosening bolts, prevent radial displacement during operation.
　　• Enhanced technical services: We offer end-to-end lifecycle support, from equipment selection and installation guidance to failure analysis, and can provide operating condition analysis reports along with improvement recommendations.
　　 III. Why Choose Us
　　• Specializing in wear-resistant castings for harsh operating conditions: We are not a foundry chasing short-term deals; instead, we are rooted in China, focusing on the R&D and manufacturing of wear-resistant castings for demanding environments such as mining and power generation. Take grinding disc liners as an example: specifically optimized for the high-impact, severe wear conditions of medium-speed coal mills, they are crafted from carefully selected high-chromium or nickel-hard cast iron with a hardness of ≥HRC58–62, combined with rigorous heat treatment. This results in significantly improved wear resistance compared to standard products, effectively extending service life and reducing downtime risks at the source.
　　• We let the data speak, not empty promises of perfection: Casting processes are complex, so we don’t claim “zero defects,” but we do commit to “zero excuses.” Each batch of grinding‑wheel segments undergoes individual hardness testing and precise measurements of flatness and hole spacing, ensuring installation accuracy and operational stability. Complete test reports accompany every shipment, demonstrating our accountability through data and action.
　　• Long-term partnerships—delivery is just the beginning: Our digital systems let you track production progress in real time, eliminating opaque operations; we respond immediately to quality concerns without delay; and every shipment includes a detailed test report for your quality records. We believe that a supplier’s attitude toward resolving issues truly reflects its value.
　　 IV. Production and Quality Assurance
　　• Premium Raw Materials: Carefully selected high-quality scrap steel, rust-free and oil-free, along with high-chromium cast iron and nickel-hard cast iron alloy additives, ensure the purity of the grinding disc material and precise alloy composition at the source.
　　• Ultimate density: Ceramic sand combined with a large-diameter heating riser eliminates shrinkage porosity and cavities; the mill plate’s internal structure is dense and uniform, enabling it to withstand high-frequency crushing and impact from the grinding rollers without cracking.
　　• Precision Melting: Melted using a Fuji electric furnace from Japan, with real-time compositional verification via spectrometer to precisely control the content of wear-resistant elements such as Cr and Ni, ensuring that the grinding disc tile hardness is ≥HRC58-62.
　　• Flawless casting: 850°C baking of the ladle combined with bottom pouring ensures no sand holes or defects; the grinding disc tile’s working surface and locating features are smooth and free of casting imperfections.
　　• Strengthened metallography: directional solidification treatment plus stepwise heat treatment yields a uniform dispersion of carbides, balanced hardness and toughness, and significantly improved wear resistance compared to conventional castings.
　　• Powerful shot blasting: cleans sand from the surface while hardening it, enhancing the wear resistance of the grinding disc shoe’s working face.
　　• Rigorous quality inspection: Hardness tested for each piece, with precise measurements of flatness and hole spacing to ensure installation accuracy and operational stability of the grinding disc tiles.
　　• Transparent delivery: Scan a code to track progress in real time, with full visibility from material input to shipment.
　　 V. Frequently Asked Questions (FAQ)
　　Q1: What material is recommended for millstones?
　　High-chromium cast iron or nickel-hard cast iron, with a hardness of ≥HRC58–62.
　　Q2: How long is the service life?
　　Performance varies depending on coal quality and operating conditions; condition analysis reports and life expectancy estimates can be provided.
　　Q3: Which models are compatible?
　　Mainstream series such as ZGM, HP, MPS, MBF, and MPH.
　　Q4: Can non-standard specifications be customized?
　　Customization based on provided drawings is supported.
　　Q5: What is the minimum order quantity?
　　Negotiable.
　　Q6: Payment method?
　　T/T or L/C.