Impact Crusher Detailed Explanation

1. Working principle and characteristics of impact crusher
Impact crushers break materials by throwing them onto impact plates via a high-speed rotor (600-1000r/min). Materials repeatedly strike between the rotor and impact plates to form the desired particle size. It features good product shape and low flakiness, suitable for medium crushing and shaping, such as highway aggregate production.

2. Selection of core components and wear-resistant materials
– Hammers: Recommend high-chromium cast iron (Cr20-Cr28), hardness HRC58-62, lasting about 300 hours in granite crushing.
– Impact plates: Use Mn13 high-manganese steel, which hardens with impact to improve wear resistance.
– Rotor assembly: Regularly check balance to avoid abnormal vibration due to wear.

3. Process parameter adjustment method
– Rotor to impact plate gap: Usually 10-30mm—reducing from 20mm to 15mm increases 0-10mm particles by 12%.
– Rotor linear speed: Optimal for PF1315 is 25-28m/s—too high increases powder, too low reduces efficiency.
– Uniform feeding: Ensure materials enter the chamber evenly to avoid uneven wear.

4. Common faults and solutions
– Abnormal hammer wear: Check for metal impurities in feed or excessive rotor speed.
– Oversized output: May be due to large impact plate gap or severe hammer wear—adjust or replace promptly.
– Increased vibration: Inspect rotor balance, bearing wear, and loose foundation bolts.