Category：Crushing Equipment

Product Introduction：The hammer crusher (also called a hammer mill) is an impact crusher that works by using a high-speed rotating hammer to hit and crush materials. It's mostly used for medium and fine crushing and is popular in gold mining, sand and gravel, construction materials, and coal industries.
1. How It Works
The motor spins the rotor at high speed, and the hammers attached to the rotor spin with it. Materials enter the crushing chamber from the top, where they’re broken by being hit by the hammers, bouncing off the liners, and colliding with each other. Pieces that are small enough pass through the gaps at the bottom, while bigger chunks stay in the chamber and get hit until they’re the right size.
2. Main Parts
It includes the feed hopper, casing, rotor assembly (shaft, disc, pins, hammers), crushing liners, bottom screen bars, drive pulley, and motor. The hammer itself is the main part that wears out, usually made from high-chromium alloy or high-manganese steel.
3. Suitable Materials (Especially for Gold Mines)
Works best for brittle ores of medium hardness, low wear, compressive strength ≤ 100MPa, and moisture under 15%—like gold, limestone, coal, gypsum, shale, etc.
It’s not good for very hard, abrasive rocks (like granite) because the hammers wear out quickly.
4. Features
Simple design, small footprint, easy to install and maintain, and parts are quick to replace.
High crushing ratio, adjustable output size, and changing the screen can adjust the discharged particles.
Can handle dry or wet crushing, making it very adaptable for processing lines.
The whole machine is sealed to help control dust.
5. Supporting Setup for Ore Processing
Usually, the ore goes through a jaw crusher first for a two-stage fine crushing process, getting it to the right size before sending it to the ball mill. If the ore has visible gold, you need to control crushing size to avoid over-crushing, which helps with later gold recovery.