Specifications of Secondary Crusher for Metallurgy Plant
Secondary crushers play a critical role in metallurgical plants by reducing the size of primary-crushed ore to a finer, more manageable consistency for further processing. Below are the key specifications and considerations for selecting an appropriate secondary crusher for metallurgy applications.
1. Types of Secondary Crushers
Common types used in metallurgy plants include:
– Cone Crushers: Ideal for hard and abrasive ores, offering high reduction ratios and consistent particle size.
– Impact Crushers: Suitable for softer or less abrasive materials, providing high throughput and cubical product shape.
– Roll Crushers: Used for intermediate crushing of friable materials like coal or limestone.
2. Key Specifications
# a) Feed Size
– Typically accepts feed material from primary crushers (~250–300 mm).
– Maximum feed size depends on crusher type and model (e.g., cone crushers handle up to 350 mm).
# b) Discharge Size (Product Size)
– Target range: 20–60 mm (adjustable via closed-side setting).
– Fine crushing may achieve <10 mm for downstream grinding circuits.
# c) Capacity (Throughput)
– Ranges from 100–1,500 TPH depending on crusher size and ore hardness.
– Must align with plant production requirements.
# d) Power Requirements
– Motor power typically between 75–600 kW, based on capacity and material hardness.
# e) Crushing Chamber Design
– Cone crushers feature mantle/concave configurations optimized for wear resistance and efficiency.
– Impact crushers utilize hammers/blow bars for high-speed fragmentation.
# f) Material Compatibility
– High-chrome or manganese steel liners/wear parts extend service life in abrasive environments (e.g., iron ore, copper).
# g) Adjustment Mechanism
– Hydraulic or mechanical systems regulate discharge settings dynamically during operation (critical for product consistency).
3. Operational Considerations
– Automation: Modern crushers integrate sensors and PLCs for real-time monitoring of load, wear, and performance.
– Maintenance Access: Easy access to wear parts reduces downtime during replacements.
– Dust Suppression: Enclosed designs or water sprays minimize dust emissions in compliance with environmental regulations.
4. Selection Criteria