MG25t電磁式ガントリークレーンによるインテリジェントなスクラップ処理

Client Background: Zhongtian Iron & Steel Group

Zhongtian Iron & Steel Group is one of China’s leading private steel manufacturers, with a complete industrial chain covering steelmaking, rolling, recycling, and logistics. As a major producer of high-quality construction steel and special steel, the group operates multiple intelligent manufacturing bases and maintains a strong commitment to green, low-carbon, and efficient production. To further modernize its scrap-handling operations and support its smart plant initiative, Zhongtian Steel introduced DAFANG’s intelligent MG25t Double-Girder Electromagnetic Gantry Crane.

MG25t Double-Girder Electromagnetic Gantry Crane

Zhongtian Iron & Steel Group achieved a significant upgrade in its scrap-handling process through the adoption of DAFANG’s MG25t electromagnetic double-girder gantry crane. Featuring electromagnetic lifting technology, a laser positioning system, and an intelligent monitoring platform, the equipment greatly improved efficiency and safety, providing the steel and metallurgical industry with an “efficient, safe, and green” logistics solution. The project also promotes gantry cranes toward greater specialization and intelligent operation, helping the client reduce operational costs and enhance productivity.

Equipment Overview

To increase scrap-handling efficiency, Zhongtian Steel deployed the MG25t double-girder electromagnetic gantry crane, configured as follows:

• Structure: double-girder truss design
• Span: 36 m
• Lifting height: 20 m
• Electromagnetic lifting disc: Ø 2.5 m, magnetic force 15 tons
• Operation modes: ground remote control + operator cabin
• Standards: fully compliant with GB/T 3811 crane design code
• Certification: ISO 12482
• Optimized for high temperature and heavy-dust environments typical of steelmaking facilities

Core Application Scenarios

Scrap Transfer Between Bays

• Task: Lifting fragmented scrap (up to 18 tons per load) and feeding the steelmaking furnace
• Performance:
• Automatic magnetic gripping system (response ≤ 3 s)
• Intelligent anti-collision for bridge and trolley
• Transfer efficiency increased by 50%
• Manual intervention reduced by 80%

Billet Yard Management

• Task: Multi-layer billet stacking (each billet 3 tons)
• Performance:
• Laser positioning accuracy ±10 mm
• Yard utilization improved by 40%

Maintenance Assistance

• Task: Lifting rolls and bearing housings (up to 12 tons each)
• Performance:
• Variable-frequency speed control (0.5–10 m/min)
• Hydraulic anti-sway system
• Maintenance safety improved by 75%

Key Technical Innovations

Electromagnetic–Mechanical Dual Drive System

• Redundant electromagnetic power supply with UPS ensures 15 minutes of magnetic holding during power loss
• Optional mechanical grab system for mixed scrap sorting

Intelligent Monitoring & Early Warning

• Integrated stress, temperature, and anti-collision monitoring
• Real-time data transmission to central dispatch via remote monitoring platform

Enhanced Structural Safety Design

• Main girders welded with Q345D high-strength steel, locally reinforced with Q460E
• Equipped with wind-proof anchoring system (up to Beaufort Level 12)

User Feedback & Benefits

• Efficiency Improvement:
  Scrap-handling capacity increased from 800 t/day → 1,200 t/day, reducing the steelmaking cycle by 2 hours
• Cost Reduction:
  Electromagnetic lifting consumes 40% less energy compared with mechanical grabs
  → Annual electricity savings approx. 800,000 RMB
• Safety Performance:
  Zero safety incidents in three years of operation
  Certified to ISO 45001 occupational health & safety standard

シンディ

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Eメール： cindywang@hndfcrane.com

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