Product Category

　　Product Highlights
　　1. Modular Splicing Design: Composed of multiple independent curved panels, individual panels can be replaced separately when worn, eliminating the need for complete disassembly. This facilitates convenient transportation, rapid installation, and significantly reduces operation and maintenance costs.
　　2. High-manganese steel casting with heat treatment: The entire component is cast from ZG120Mn13 or ZG120Mn13Cr2 high-manganese steel, and after heat treatment achieves high surface hardness, effectively resisting continuous impacts from large ore chunks and abrasive particle erosion.
　　3. Grid-like Reinforcement Structure: Scientifically designed internal stiffeners on the liner significantly reduce overall weight while enhancing load-bearing capacity and resistance to deformation, ensuring stability and reliability under heavy-load conditions.
　　User Pain Points
　　The lining ring for mine tunnels is a critical wear‑resistant protective component in underground mines, tunnel projects, and mineral processing conveyor systems, enduring high‑velocity impacts from ore and continuous abrasive erosion. Traditional liners suffer from three major drawbacks: ① Monolithic liners are bulky, making transportation and installation difficult; any damage to a single section necessitates replacing the entire unit. ② Conventional materials lack sufficient wear resistance, requiring frequent replacements that result in significant downtime and high maintenance costs. ③ The humid, dusty, and highly corrosive underground environment readily causes liner deformation, displacement, or even fracture.
　　Solution
　　Our company’s mine roadway lining rings feature a modular, spliced design, assembled from multiple independent curved panels. Individual worn sections can be replaced without dismantling the entire assembly. Made from high-manganese steel and strengthened through heat treatment, they offer high surface hardness and excellent impact resistance. Reinforcement ribs enhance overall rigidity, enabling the system to withstand complex underground conditions and ensuring the long-term, continuous operation of roadways and associated equipment.
　　I. Product Description
　　The mine roadway lining ring is a highly wear-resistant protective component specifically developed for underground mines, tunneling projects, and mineral processing conveyor systems. Made from high-strength, high-manganese steel via precision casting, it is integrally formed and assembled from multiple independent arc-shaped segments. Pre-drilled bolt mounting holes on the surface facilitate rapid on-site installation. The product is widely used in heavy-wear areas such as underground roadways, chutes, skip bins, crusher chambers, and large-scale dry quenching coke units in coal, metal, and non-metal mines.
　　II. Product Specification Sheet

　　III. Product Features and Advantages
　　1. Modular assembly for easy maintenance: Constructed from individual curved panels, worn components can be replaced individually without disassembling the entire unit, resulting in low spare-part costs and minimal downtime. Square pre-drilled holes provide secure bolted connection points, ensuring high installation accuracy.
　　2. High-manganese steel casting, wear-resistant and impact-resistant: Made from ZG120Mn13 high-manganese steel, which achieves high surface hardness after heat treatment, effectively resisting high-velocity impacts and continuous abrasive erosion from large ore chunks, coal, and other materials. The chromium-upgraded version (ZG120Mn13Cr2) offers even greater wear resistance, extending service life.
　　3. Reinforced rib structure with strong deformation resistance: A grid-like reinforcing rib system is arranged on the inner side of the liner, significantly reducing overall weight while enhancing structural load-bearing capacity. This effectively absorbs formation pressure, prevents displacement or deformation of the entire structure, and ensures suitability for complex downhole conditions characterized by high humidity, abundant dust, and severe corrosion.
　　IV. 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 our mining liner rings as an example: specifically optimized for high‑impact, highly abrasive conditions in underground tunnels and chutes, they feature a modular, spliced design composed of multiple independent curved plates. When a single segment wears out, it can be replaced individually without dismantling the entire assembly. Under severe impact, the surface of high-manganese steel rapidly work‑hardens to HB500 or higher; combined with a grid‑like rib structure, this significantly enhances deformation resistance, effectively protecting mine tunnels and associated equipment and reducing downtime losses at the source.
　　• We let the data speak, not empty talk of perfection: Casting processes are complex; we don’t promise “zero defects,” but we do promise “zero excuses.” Every batch of mine liner rings undergoes full‑process inspection—including hardness testing, precise dimensional measurement, and magnetic particle flaw detection—to ensure the assembly accuracy of each curved segment and optimal installation fit. Complete test reports are provided, 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 mine liner ring material at the source, laying the foundation for the work-hardening properties of manganese steel.
　　• Ultimate Density: Ceramic sand combined with a large-diameter heating riser eliminates shrinkage porosity and cavities; the internal microstructure of the lining ring is highly dense, and the curved segments distribute stress evenly, ensuring no cracking under the high compressive loads imposed by the ore.
　　• Precise Melting: Melted in a Fuji electric furnace from Japan, with real-time spectral analysis to verify composition, enabling precise control of carbon and manganese levels and ensuring the liner ring’s hardenability and impact toughness.
　　• Flawless casting: 850°C package baking plus bottom-pouring process eliminates sand-hole defects; the lining plate’s annular arc-shaped working surface and all panel joints are smooth with no casting imperfections.
　　• Strengthened metallography: 30-second rapid quenching yields a single austenitic microstructure, achieving an “hard exterior, tough interior” profile for the liner ring—surface hardness reaches HB500–600 while the core retains high toughness, enabling it to withstand impacts from large ore chunks without fracturing.
　　• Powerful shot blasting: cleans and hardens the surface, enhancing the wear resistance of the liner ring’s working face.
　　• Rigorous quality inspection: precise dimensional measurements and magnetic particle testing ensure the assembly accuracy and installation fit of each curved panel, achieving a perfect match with the mine tunnel lining.
　　• 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 is the function of a stiffener structure?
　　While significantly reducing overall weight, it enhances pressure-bearing and deformation-resistance capabilities, effectively absorbing formation pressure and preventing liner ring displacement or deformation.
　　Q2: What is the delivery time?
　　Custom fabrication of mine roadway lining rings takes 45–60 days. Expedited service is available for urgent orders upon negotiation.
　　Q3: What packaging options are supported?
　　Fixed with steel brackets and protected by stretch film, or packaged in wooden crates, to meet the sea and land transportation requirements for vertical mill blades.
　　Q4: Can the customer’s logo be printed on the packaging?
　　Yes, but cast lettering is only supported on the non-working surface of the casting.
　　Q5: How can you tell if the liner ring needs to be replaced?
　　When the liner ring exhibits significant wear and thinning, surface cracks, deformation, or bolt loosening resulting in displacement, it is recommended to replace it promptly.