A crusher for highly abrasive granite: how to choose one and what to look out for when buying

Choosing a crusher for highly abrasive granite leaves no room for error, as this stone causes rapid wear and tear on the machine’s working parts, so you need to prioritise abrasion resistance, a throughput capacity suited to your volumes, and ease of maintenance, to avoid wasting money on repairs and downtime.

We assess the abrasion resistance of the working components

When dealing with highly abrasive granite, it is essential that the crushing components are made from a high-chromium alloy or hardened steel with added tungsten carbide, as these materials can withstand contact with hard stone many times longer than standard structural steels, without requiring frequent replacement. It is not worth skimping on these components; cheaper alternatives will fail after just a few hundred hours of operation.

Selecting the right type of crusher for production requirements

The following are suitable for the primary crushing of large granite boulders jaw crushers, they can easily process material up to 1 metre in size, whilst for producing fine, cube-shaped aggregate in the secondary stage, it is better to use cone or rotary crushers with a closed crushing chamber. Avoid using hammer mills for highly abrasive raw materials, as their hammers wear out too quickly when processing such hard rock.

Check the additional specifications before buying

Make sure the machine features a quick-change system for crushing elements and that the manufacturer provides after-sales support in your region; you should also compare energy consumption per tonne of finished product, as any extra electricity costs will quickly offset any savings made from the low price of the equipment itself. Also, don’t forget to check the warranty period for the main wear parts; this will serve as an additional guarantee of quality.