Product Category

　 　Product Highlights
　　1. Work-hardened to HB500 or higher: The initial material exhibits excellent toughness; upon high-frequency impact from steel balls, the surface rapidly hardens to HB500 or above, forming a highly wear-resistant layer while the substrate retains its high toughness, effectively preventing fracture.
　　2. Large-diameter hot riser casting process: The casting undergoes sustained high-temperature feeding during solidification, eliminating shrinkage cavities, looseness, and internal porosity defects, while significantly improving the lining plate’s density and mechanical properties.
　　3. Three material options are available: high-manganese steel (the first choice for heavy impacts), medium- and low-alloy steel (the cost-effective option), and high-chromium cast iron (for exceptional wear resistance), scientifically matched to suit different operating conditions.
　　 User Pain Points
　　Mill liners are critical protective components for the cylinders of grinding mills in industries such as mining, cement, and power generation, enduring high‑frequency impacts from steel balls and material abrasion over long periods. Traditional liners suffer from three major drawbacks: ① High‑manganese steel parts often exhibit shrinkage cavities and porosity, causing the liners to crack and fail under impact; ② Improper material selection—using brittle materials in large mills subjected to severe impact results in fracture, while employing high‑manganese steel in medium‑ and small‑size mills operating under low‑to‑moderate impact fails to fully exploit its work‑hardening benefits; ③ In service conditions involving both severe corrosion and wear (e.g., desulfurization mills, phosphate fertilizer mills), conventional materials have extremely short lifespans.
　　 Solution
　　Our company employs a large-diameter riser casting process for liner plates, effectively eliminating internal porosity defects. We offer a scientifically tailored selection of three material grades—high-manganese steel, medium- and low-alloy steel, and high-chromium cast iron—to precisely match the specific operating conditions and impact loads of various grinding mills.
　　 I. Product Description
　　This ball mill liner is specifically engineered for high‑wear applications in mining, cement, power generation, and other demanding industries, serving as a critical component that protects the mill shell and enhances grinding efficiency. It is typically fabricated from premium high‑manganese steel, offering a unique combination of surface hardness and core toughness. During manufacturing, a large‑diameter riser casting process is employed, complemented by fully automated heat treatment, which effectively extends service life and reduces the frequency of shutdowns for maintenance.
　　 II. Product Specification Sheet

　　 III. Product Features and Advantages
　　1. Hard on the outside, tough on the inside—hardening with wear: High-manganese steel liners exhibit excellent initial toughness. During grinding, frequent impacts from steel balls rapidly harden the surface to HB500 or higher, forming a highly wear-resistant layer, while the underlying matrix retains high toughness, effectively resisting impact and tearing and preventing fracture.
　　2. Large-diameter hot riser casting: The casting undergoes sustained high-temperature feeding during solidification, effectively eliminating shrinkage cavities, looseness, and internal porosity. Combined with fully automated heat treatment, this significantly enhances density and mechanical properties.
　　3. Scientific selection and on-demand matching: The high-manganese steel series (ZGMn13/Mn13Cr2) is suitable for heavy‑impact applications such as coarse grinding chambers, large grinding balls with diameters of 90 mm or greater, and hard, bulky ores; medium‑ and low‑alloy steels are ideal for medium‑ and small‑size mills and cement fine‑grinding chambers, offering excellent cost‑effectiveness under moderate to low‑impact conditions; high‑chromium cast irons (BTMCr20/Cr26) are designed for corrosive and abrasive environments, such as desulfurization mills and phosphate fertilizer mills.
　　 IV. Why Choose Us
　　• Specializing in wear-resistant castings for harsh operating conditions: Rooted in China, we focus on the R&D and manufacturing of wear-resistant castings for demanding environments such as mining and power generation. Take high-manganese steel ball mill liners as an example: specifically optimized for the high-frequency impact and severe wear conditions of ball mill grinding media, these liners are made from ZGMn13Cr2 high-manganese steel and produced using a large-diameter hot riser casting process that effectively eliminates shrinkage porosity and looseness. Under impact from the grinding balls, the liner surface undergoes work hardening to a hardness exceeding HB500, while the core retains high toughness, ensuring resistance to impact-induced fracture. This results in a long service life and significantly reduces downtime for replacement.
　　• We let the data speak, not empty promises of perfection: Casting processes are complex; we don’t promise “zero defects,” but we do commit to “zero excuses.” Each batch of ball mill liners undergoes a comprehensive inspection process—including hardness testing, precise dimensional measurements, and magnetic particle inspection—to ensure the accuracy of mounting holes and mating surfaces, achieving seamless alignment with the mill shell. 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.
　　 V. Production and Quality Assurance
　　• Premium Raw Materials: Carefully selected high-quality scrap steel and manganese alloy additives, free of rust and oil, ensure the purity of the ball mill liner material at the source, laying the foundation for the impact-hardening performance of high-manganese steel.
　　• Ultimate density: Ceramic sand combined with a large-diameter heating riser eliminates shrinkage porosity and cavities; the lining plate’s internal structure is dense, enabling it to withstand high-frequency impacts from steel balls and ore without cracking.
　　• Precise melting: Melting is performed using a Fuji electric furnace from Japan, with real-time compositional verification via spectrometer to precisely control carbon and manganese levels, ensuring the liner’s hardenability and impact toughness.
　　• Flawless casting: 850°C package baking plus bottom-pouring process eliminates sand-hole defects; the working surface of the liner and mounting holes are smooth with no casting flaws.
　　• Strengthened metallography: 30-second rapid quenching yields a uniform austenitic microstructure, achieving a “hard exterior, tough interior” lining plate—surface hardness exceeds HB500 while the core retains high toughness, enabling it to withstand high-frequency impacts from steel balls without fracturing.
　　• Powerful shot blasting: cleans sand from the surface while hardening it, enhancing the wear resistance of the liner’s working face.
　　• Rigorous quality inspection: Magnetic particle testing ensures precise dimensions of the liner mounting holes and mating surfaces, achieving a perfect fit with the cylinder.
　　• Transparent delivery: Scan a code to track progress in real time, with full visibility from material input to shipment.
　 　VI. Frequently Asked Questions (FAQ)
　　Q1: What material is recommended for ball mill liners?
　　For coarse grinding chambers, large steel balls, and high-impact operating conditions, select high-manganese steel (ZG120Mn13Cr2); for fine grinding chambers and medium-to-low impact conditions, choose medium- to low-alloy steel; and under corrosive‑wear conditions, opt for high-chromium cast iron (BTMCr20/Cr26).
　　Q2: What is the service life of high-manganese steel liners?
　　Service life depends on mill operating conditions and grinding‑media size; after work hardening, the surface hardness exceeds HB500, and when combined with a hot‑top riser process to eliminate internal defects, the service life is significantly extended.
　　Q3: What packaging options are supported?
　　Fixed with steel brackets and protected by stretch film, or packaged in wooden crates, to meet the requirements of sea and land transportation.
　　Q4: What is the delivery time?
　　Customization based on your drawings takes 45–60 days; expedited service is available upon negotiation for urgent orders.
　　Q5: What payment methods are supported?
　　We accept T/T (telegraphic transfer) and L/C (letter of credit). For first-time collaborations, we recommend T/T; specific terms are negotiable. Other phased payment arrangements can also be discussed.