ROR configurations are recommended when crushing the most abrasive materials, in tertiary and quaternary applications where additional fines production is desired.
Autogenous crushing occurs inside crusher chamber between material thrown from rotor and material resting on rock shelf or material springing back from rock shelf.
Production of cubical high quality aggregates and sand from highly abrasive input materials, such as gravel, granite, quartzite etc
Crushing of highly abrasives materials, such as aluminum oxide, ferrosilicon, abrasives, glass etc
Selective crushing of slags from steel mills, waste incineration plants etc.

Impact crushing on anvils and also autogenous crushing between material springing back from anvils and material thrown from rotor occurs at the same time.
This type of crushing is recommended for low and medium abrasive materials such as gravel, limestone, dolomite, diabase, bricks, cement clinker etc
Production of cubical and high quality sand can be achieved.
Additional fine production can be obtained with higher rotor speeds.
Selective crushing of conglomerates, moderately abrasive slags, industrial minerals, mining overburden etc
Recycling of asphalt and unreinforced concrete waste.