Calcium Carbonate Preliminary Crushing

Preliminary crushing is an indispensable pre-process in the calcium carbonate powder processing flow, whose core function is to crush large-grained calcium carbonate raw ore to a particle size range that meets the feeding requirements of subsequent grinding equipment.

After mining, the particle size of calcium carbonate raw ore can usually reach tens of centimeters or even larger. If it is directly fed into grinding equipment such as vertical mills, it will not only exceed the equipment’s feeding limits, but also cause strong impact on core components like grinding rollers and discs, accelerating equipment wear. Meanwhile, it will greatly reduce grinding efficiency and increase energy consumption. The preliminary crushing process generally adopts equipment such as jaw crushers and impact crushers to crush large ore lumps into uniform particles of several millimeters to more than ten millimeters, meeting the feeding standards of downstream equipment.

In addition, the preliminary crushing process can initially screen out impurities such as soil and metal debris mixed in the raw materials through its screening function, reducing the interference of impurities in subsequent processing steps. It not only ensures the stable operation of the equipment, but also lays a solid foundation for producing calcium carbonate powder with uniform particle size and qualified quality.

Equipment and Processes We Can Provide

Tailored Solutions for Calcium Carbonate Powder Processing

Jaw Crusher

The jaw crusher is a commonly used device for the preliminary crushing of calcium carbonate, featuring a simple structure and easy operation. It crushes ore through the extrusion and bending action of the movable jaw and fixed jaw, and can handle calcium carbonate raw ore with high hardness. It has a large feed particle size and adjustable discharge particle size. The equipment operates stably with a low failure rate and low maintenance costs, making it suitable for the coarse crushing stage of large-scale calcium carbonate processing production lines, and can quickly crush large ore lumps to a reasonable particle size.

Cone Crusher

The cone crusher is mostly used for the secondary crushing of calcium carbonate. It adopts the principle of laminated crushing and extrudes materials through the relative movement of the moving cone and fixed cone. The crushed calcium carbonate particles have a regular shape and uniform particle size, reducing over-crushing. The equipment has high crushing efficiency and low energy consumption, with good sealing performance that can effectively reduce dust pollution. It is suitable for calcium carbonate processing flows with high requirements for finished particle size, and is compatible with subsequent fine grinding processes.

Impact Crusher

The impact crusher relies on a high-speed rotating rotor to drive blow bars to impact calcium carbonate materials, and achieves crushing through the collision between materials and blow bars as well as between materials themselves. It has a large crushing ratio, and the finished particles are cubic with a low content of needle-like and flaky particles, meeting different particle size requirements. The equipment has a compact structure and strong adaptability, can handle calcium carbonate raw materials with moderate moisture content, and is often used in secondary and fine crushing stages to improve the raw material utilization rate of subsequent processing.