What are the crushing and milling equipment commonly used in limestone processing

In limestone processing, crushing equipment generally processes larger pieces of limestone, and the finished product has a coarser particle size, usually larger than 8 mm. Different crushing equipment structures and working principles are different. There are coarse crushing, medium crushing and fine crushing crushers. And the limestone processed by the milling equipment is generally small, and the particle size of the finished product can reach 3250 mesh.

Limestone crushing equipment is divided into four categories according to the crushing method and mechanical structure characteristics (operation principle).

1. Jaw crusher, the crushing effect is that the movable jaw plate is periodically pressed against the fixed jaw plate, and the limestone sandwiched therein is crushed.

2. Cone crusher, limestone is located between the inner and outer cones, the outer cone is fixed, the inner cone swings eccentrically, and the limestone sandwiched in it is crushed or broken.

3. The impact crusher, due to the impact of the limestone by the plate hammer, the impact of the impact plate and the collision with each other, internal cracks and loosening continue to occur, and the crushing effect is achieved.

4. Impact crusher, the limestone material is crushed by the impact of fast-moving moving parts, and qualified finished materials are obtained.

There are three types of milling equipment

1. Vertical mill, the grinding roller rotates to generate outward centrifugal force (that is, squeezing force) to crush the limestone, thereby achieving the purpose of milling.

2. The high-pressure pulverizer, under the action of external force, presses tightly on the material of the grinding disc. Driven by the grinding disc, the grinding roller rotates accordingly, thereby crushing and crushing the material.

3. Ultra-fine mill, limestone is scattered to the periphery of the circle under the action of centrifugal force, and falls into the raceway of the grinding ring and is crushed by ring rollers by stamping, rolling and grinding.

Various types of crushers have different specifications and different application ranges. At present, the coarse crushing used in the plant usually uses jaw crushers or rotary cone crushers; medium crushing uses standard cone crushers or impact crushers; fine crushing uses short-head cone crushers and impact crushers.

The more common milling equipment is the vertical milling machine. High-pressure milling machines and ultra-fine milling machines can also be selected according to the required fineness.