用于提高钢坯搬运效率的电磁龙门起重机

Client Background: Jiangsu Nanjing Iron & Steel (Nangang)

Jiangsu Nanjing Iron & Steel Co., Ltd. (Nangang) is a major steel producer in East China, known for its advanced rolling mills, high-quality plate and section steel production, and strong commitment to intelligent and green manufacturing. As part of its smart plant upgrade strategy, Nangang sought to optimize billet and plate handling efficiency in its rolling workshop. To support this initiative, the company adopted DAFANG’s intelligent Electromagnetic 龙门吊, enabling a significant leap in automation, safety, and operational performance.

Electromagnetic Gantry Crane Applied in Rolling Workshop Material Handling

By deploying DAFANG’s electromagnetic gantry crane, Jiangsu Nangang achieved intelligent upgrading of the material handling process in its rolling workshop. With electromagnetic adsorption technology, laser positioning, and an intelligent monitoring platform as its core features, the equipment greatly enhanced efficiency and operational safety, delivering an “efficient, safe, and green” logistics solution for the metallurgical industry. This project demonstrates the development of gantry cranes toward higher specialization and smarter operation, helping the client achieve cost reduction and productivity improvement.

设备概览

To improve billet handling efficiency in the rolling workshop, Nangang introduced the Electromagnetic Gantry Crane featuring:

• Double-girder design
• Rated lifting capacity: 50 tons
• Span: 32 m
• Lifting height: 24 m
• Electromagnetic lifting disc: Ø 3 m, magnetic force 35 tons
• Operation modes: ground remote control + cabin control
• Full compliance with GB/T 3811 crane design standard
• Certified to ISO 12482
• Specially engineered for high-temperature and heavy-dust metallurgical environments

核心应用场景

Billet Transfer

• Task: Handling hot billets (45 tons each, 15 m long)
• 表现：
• 自动磁性抓取系统（响应时间≤3秒）
• 桥梁和电车的智能防碰撞系统
• Transfer efficiency increased by 60%
• 人工干预减少了 80%

Plate Yard Management

• Task: Multi-layer plate stacking (12 tons per plate)
• 表现：
• 激光定位精度±10毫米
• 堆场利用率提高了 40%

维护协助

• Task: Lifting mill rolls and bearing housings (up to 20 tons each)
• 表现：
• 变频调速（0.5–10 米/分钟）
• 液压防摇摆系统
• 75% 提高了维护安全性

关键技术创新

电磁-机械双驱动系统

• Redundant electromagnetic power with UPS ensures 15 minutes of magnetic holding during power loss
• Optional mechanical grab mode for mixed material handling

智能监测与预警

• 集成应力、温度和防碰撞监测
• Real-time transmission of key parameters to the central dispatch system

增强型结构安全设计

• Main girders welded from Q345D high-strength steel, with local reinforcement using Q460E
• Equipped with wind-proof anchoring system (resistance up to Level 12 winds)

User Feedback & Practical Benefits

Efficiency Improvement

• Billet turnover in the rolling workshop increased from 1,800 t/day → 2,500 t/day, accelerating production rhythm by 35%.

Cost Optimization

• Electromagnetic lifting consumes 40% less energy compared with mechanical grabs → Annual electricity savings approx. 800,000 RMB

Safety Performance

• Zero safety incidents in five years of operation
• Certified to ISO 45001 occupational health & safety standard

辛蒂

微信： +86-19137386654

邮箱： cindywang@hndfcrane.com

我是Cindy，在起重机行业有10年的工作经验，积累了丰富的专业知识，为500+客户挑选了满意的起重机，如果您对起重机有任何需求或疑问，欢迎随时联系我，我会用我的专业知识和实践经验帮您解决问题！