Portable Ballast Crusher for Sale
Experimentation with ballast materials revealed that the best choice for a supporting layer under the track was crushed stone. Railroads started to use crushed limestone and quartz for the track underlayment. These materials proved a great advance over using earth or coal cinders as a support system as they were much stronger and more durable.
Crushed stone does an excellent job of preventing any weeds from growing on the track and also drains well. Drainage remains an important part of any railway today, which is why the outside edges of the ballast slope downward and away from the track.
Ballast Crushing Production Line
Ballast is produced from many types of crushed stone such as limestone, granite, dolomite, traprock, sandstone, quartzite, marble, talc etc. In ballast production line, the raw materials will be first extracted. Techniques used for extraction vary with the nature and location of the deposit. Processing operations involved includes crushing, screening, size classification, material handling and storage operations.
Ballast crushing production line can be arrange in three stages accroding to raw material property and final product requirements. The three crushing stages includes primary crushing, secondary crushing and tertiary crushing. SBM provides complete series of stationary and portable ballast crusher for sale.
Primary crushing: the machines involved includes vibrating feeder and screens separate large boulders from finer rocks, and primary crusher such as jaw crusher, impact crusher, or gyratory crushers.
Secondary crushing: scalping screen is used to separate oversized rock from the smaller stone, cone crusher and impact crusher are applied to further crush the materials.
Tertiary crushing is usually performed using cone crushers or other types of impactor crusher.