Can You Choose Roll Crusher For Ore Crushing? Whether to choose roll crusher for ore crushing needs to be combined with the characteristics of the ore, production demand and equipment performance comprehensive judgement.
Ore roll crusher crushing site
The following is the key analysis:
1. Roll Crusher for Ore Type and Scenario
Medium hardness ores (preferred)
Limestone, gypsum, dolomite: the roll crusher crushes by squeezing, the discharge size is uniform (1-30mm adjustable), the over-crushing rate is low, and the follow-up process is simplified.
Coal, coke: especially suitable for the direct crushing of raw coal containing gangue, no need for pre-demulsification, reducing the cost of coal selection.
High hardness ores (need to optimise the design)
Iron ore, quartz stone: fully hydraulic models (e.g. Huasheng Ming 1510) can handle ores with compressive strength ≤160MPa, but the roll surface wears faster and requires regular maintenance.
Case: Vale of Brazil uses rollers to process iron ore, with an hourly output of 1,200 tonnes and a controllable discharge size of 1-5mm.
Brittle ores (obvious advantages)
Quartz, feldspar, ceramic raw materials: extrusion crushing to reduce over-crushing, high particle size uniformity (±1mm error), to protect the quality of raw materials for ceramics and glass.
Wet clay ores (special design)
Mud-containing ores, wet clay: the roll surface is equipped with scraper anti-stick rollers, allowing the material moisture content ≤ 35%, superior to jaw and cone crusher.
Ore roll crusher crushing principle
2. Not applicable
Extremely hard materials: diamond, corundum (Moh’s hardness>9) extrusion crushing efficiency is low, easy to aggravate the wear of roll surface.
Oversized ore: feed size should be ≤80mm (some models ≤150mm), and large ores need to be roughly crushed by the jaw first.
Flammable and explosive materials: the roll crushing process may generate sparks, not applicable to sulfur ore and other flammable materials.
3. Performance Advantages and Limitations
Advantages
Precise control of particle size: Hydraulic adjustment of roll gap (accuracy of 1mm), discharge 1-50mm adjustable to meet the requirements of fine crushing.
Low over-crushing rate: extrusion crushing rather than impact crushing, reducing the generation of powder (e.g. coal crushing powder rate reduced by 20%).
Energy saving and environmental protection: the unit power consumption is only 2.4kW-h/tonne, and the dust leakage rate is 50% lower than that of jawbreaker.
Strong adaptability to wet materials: special roll surface design to deal with cemented ores and avoid clogging.
