550T+150T/75T Capacity Charging/Teeming & Hot Metal Ladle Handling Cranes for SMS at the JSW Dolvi Plant

Client Overview

Client name/Industry: JSW Steel (Dolvi Plant), one of India’s largest private steel manufacturers
Sector: Steel Melt Shop
Location: Dolvi, Maharashtra
Scale: 15 MTPA

Why did they choose us?

Anupam has been a long-time supplier to the JSW Group with a proven track record. Our expertise in heavy-duty, high-capacity cranes made us a strong choice for their critical material-handling requirements.

The Challenge

Problem Statement:

JSW required the highest-capacity EOT crane for their most critical shed, the Steel Melt Shop. This demanded a crane capable of handling extreme loads with minimal downtime while operating reliably in the harsh conditions of a steel plant.

Key Requirements

• High load capacity
• Continuous duty cycle
• Redundancy for operation and safety
• Precise control in a hostile environment

Solution: Main Hoist Mechanism

• The main hoist mechanism is equipped with four motors and two planetary gearbox systems.
• Four motors drive through two gearboxes with in-built planetary gears.
• Rope drums are mechanically connected through a bull gear, ensuring synchronized drum motion.

Motor Sizing:

• Motors are selected in standard sizes across all four units, reducing both initial and maintenance costs.

Gearbox Sizing:

• Use of two planetary gear units allows for a more compact gearbox design.

Operational Reliability

• UIf one main hoist motor fails, the crane operates at half the rated hoist speed with 100% load using the remaining motors.
• If two main hoist motors fail, the crane continues operation at half speed with the remaining two motors at100% load.
• If the input pinion of one main hoist gearbox fails, the crane maintains 100% redundancy, operating at half speed with full load using the alternate planetary gear train.

Safety Maintenance Advantages

• The system is highly reliable, as all service brakes and the rope drum gear train contribute to electro-mechanical braking in case of any mechanical failure between the motor and rope drum.
• Simplified maintenance with fewer spare parts required. 100% fail-safe operation with no free fall under any condition.
• No requirement for an emergency disc brake on the rope drums.