Hot Rolled Grinding Ball Production Line Lifts Capacity by 30% to 50,000 t/a

Capacity Upgrade Target Achieved

The newly upgraded hot rolled grinding ball production line has been formally put into operation, lifting the client’s annual output by 30% and reaching 50,000 tons per year. The upgrade project covered skew rolling mill reconstruction, induction reheating system optimization, online quenching and tempering unit renovation, and intelligent control upgrading. After continuous trial rolling and parameter tuning, the line achieves stable continuous forming, and the hourly throughput meets the design index. This capacity expansion effectively relieves the customer’s supply pressure amid rising orders from mining and cement markets. Different from intermittent forging lines, this hot rolling line features continuous rolling, which greatly improves production rhythm and realizes large-volume, standardized grinding media manufacturing. The whole system passed load testing, and all safety and process indicators have been accepted by the client’s technical team.

Core Hot Rolling Process Advantages

Hot rolled grinding balls are formed by skew rolling of round steel bars under high temperature, with compact internal metallographic structure and uniform grain distribution. Compared with cast grinding balls, hot rolled products have better roundness, smaller dimensional tolerance and lower breakage rate during mill operation. The induction heat treatment machine delivers fast and uniform heating, avoiding local overheating or underheating. Online quenching and tempering are matched right after rolling, stabilizing hardness within 58–65 HRC and balancing surface hardness and core toughness. The line supports multiple common specifications from Φ20 mm to Φ80 mm, and can switch sizes flexibly according to order plans. Material utilization rate is significantly higher, with almost no riser waste, reducing raw material loss and cutting unit production cost.

Intelligent Linkage and Quality Traceability

The production flow includes automatic bar feeding, induction reheating, skew rolling forming, conveying, controlled quenching, tempering, cooling, sorting and finished packaging. A PLC central control system links all sections, automatically adjusting heating power, rolling speed and cooling curve according to ball size and steel grade. Infrared temperature sensors monitor furnace and ball surface temperature in real time, while online sampling devices cooperate with offline metallographic and impact testing. Every batch is recorded with process parameters for full traceability. Manual operation is reduced greatly, lowering human error. The line is equipped with automatic sorting for defective balls, effectively improving finished product yield and ensuring consistent quality for bulk delivery.

Energy Saving and Low-Carbon Optimization

Energy efficiency was a key focus in this upgrade. The steel ball hot rolling & forging machine adopts heat recovery structure to reuse waste heat for preheating raw bars, cutting overall power consumption. The closed circulating cooling system reduces water consumption and wastewater discharge. Compared with traditional fuel furnaces, electric induction heating produces no flue gas, meeting strict environmental requirements. Modular layout simplifies maintenance, and key wearing parts are designed for quick replacement to shorten downtime. For grinding media manufacturers facing rising energy costs, this high-efficiency hot rolling line helps balance output growth and carbon reduction targets.

Stronger Supply Capacity for Downstream Industries

With 50,000 t/a capacity, the client can serve large mineral processing plants, cement clinker grinding lines and thermal power grinding systems steadily. Hot rolled grinding balls with low breakage and good wear resistance help mines reduce grinding media consumption and lower mill operation cost. Stable delivery capacity improves the customer’s competitive edge in both domestic and overseas grinding media markets. The engineering team will provide long-term technical support, including operator training, regular inspection and remote fault diagnosis.

Future Expansion Plan

This successful upgrade verifies the reliability of modular hot rolling grinding ball technology. The R&D team will continue optimizing rolling dies and heat treatment curves to develop higher-grade alloy hot rolled balls. Based on this 50,000 t/a reference case, customized lines for different capacity targets will be promoted for global grinding media manufacturers. The solution further highlights the advantages of continuous hot rolling technology and supports more customers to realize high-efficiency, intelligent and low-cost grinding ball production.

Overseas manager:Mr. Wang

Email:tom@foreverfurnace.com

Phone/Wechat/Whatsapp:+8613303078975