The roll crusher is irreplaceable in small and medium-sized sandstone plants, ore dressing plants and coal processing due to its advantages of simple structure, controllable particle size and low energy consumption. The double-roll crusher (double-roll crusher) has significant advantages in the field of sandstone crushing, and is especially suitable for medium and fine crushing of medium hardness materials (such as limestone, coal, granite, etc.).
The following is an analysis of the core advantages of the roll crusher:
Core advantages of roll crusher
1. Simple structure and low maintenance cost
The crushing structure consists of only two rollers, a drive device and a frame, with fewer parts and a low failure rate. – The roller skin can be replaced easily, and the downtime for maintenance is short.
2. Large material crushing ratio and uniform particle size
The material can be precisely controlled to have a particle size (usually ≤5mm) by adjusting the gap between the rollers (1-10mm). The particle shape of the finished material is mostly cubic, and the content of needle-like particles is less than 5%, which is better than hammer crusher and impact crusher.
3. Low energy consumption and low noise
The energy consumption of the double roll crusher is 30%-50% lower than that of the cone crusher, and the power consumption is about 7-10kW·h/ton. – The operating noise is less than 85dB, which meets the environmental protection requirements.
4. Double roll crusher has strong applicability
It can process wet and sticky materials (such as muddy shale) with a moisture content of ≤15% and is not prone to clogging. – Suitable for crushing medium-hard (compressive strength ≤160MPa) and below materials.
5. With overload protection
The hydraulic or spring device of the double-roll crusher automatically adjusts the roller spacing, and the rollers automatically retreat when foreign matter enters to avoid equipment damage.
Application Cases
The double-roll crusher can be used as the third-level crushing equipment for granite sand making, which can further crush the 20-40mm material to 0-5mm. The finished sand has continuous grading and the fineness modulus is stable at 2.3-3.0.
Coal/coke crushing:
It can process raw coal with moisture content of 10%-15% and the output particle size is 3-30mm, which can meet the needs of power plants and coking plants.
Pre-crushing in ore dressing plant:
Crushing the ore to ≤5mm improves the feeding efficiency of the ball mill and reduces the energy consumption of grinding.
