The crushing of limestone and coal choose stick crusher choose flat roll or toothed roll? The following is the summary of Huashengming Heavy Industry according to the characteristics of the roll surface of the stone crusher and the characteristics of the material.

Gravel Sand Stone Crushers Smooth & Teeth Type Double Rolleres for Stone Crusher for Limestone Coal

Smooth double roll crusher applicable scenes

Material Characteristics Adaptation
Smooth face rolls are suitable for handling hard, abrasive materials (such as corundum, silicon carbide, but the search shows that they are also suitable for medium and fine crushing of medium-hard limestone, and the finished size can be adjusted to 2-8mm.

Technical Advantages

The roll surface adopts carburising and quenching process, the hardness of wear-resistant layer reaches HRC52-58, the service life is more than 6000 hours, the crushing ratio is 4-12, the over-crushing rate is low, and the finished product has even grain size.Handling capacity is 50-1250t/h (depending on the model), which is suitable for the large quarry.

Core Advantages of  Toothed Double Roll Crusher

Upgraded crushing mechanism

The combination of extrusion and splitting action of the toothed roll surface increases the crushing efficiency of low to medium hardness brittle materials (e.g. coal, marl) by 30%, and the maximum capacity of a single machine reaches 300t/h.

Typical application data

Coal crushing, 1000mm raw material can be crushed to ≤300mm, over crushing rate <15% limestone crushing 2-20mm accounted for more than 80% of the finished product, fines rate control within 5% equipped with hydraulic spring overload protection, failure downtime rate reduced to 0.5 times / 1,000 hours.

Suggestions

Limestone crushing

Preferred coarse crushing stage is to use toothed double-roller (feed size ≤ 800mm) fine crushing requirements of 2-8mm fine aggregate, recommended glossy double-roller (such as 2PGY1800*1000, 160-240 tonnes per hour production capacity)

Coal crushing

Toothed double roller machine is the optimal solution, when processing raw coal with moisture content ≤ 35%, the energy consumption per tonne is only 1.2-2.4kW-h Recommended configuration of wolf tooth crushing teeth, the life of the rollers reaches 4000 hours when crushing coke.
Both types of equipment support hydraulic/mechanical spring adjustment of roll spacing (accuracy ±1mm), it is recommended to choose the type of roll surface according to the hardness of the material (coal ≤ 80MPa, limestone 50-80MPa), and regularly carry out roll surface surfacing repair.