Jaw crushers are the workhorses of the crushing world, primarily designed for breaking down hard, abrasive, and tough materials. They are almost always used as primary crushers, meaning they take the largest, run-of-mine or run-of-quarry rock and break it into a more manageable size for secondary crushers.
Jaw Crusher Application Materials
Here is a breakdown of the main materials jaw crushers are used to crush, grouped by industry:
1. Quarrying and Construction Aggregates
This is the most common application. Jaw crushers are essential for producing the stone used in roads, buildings, and other infrastructure projects.
Granite: Extremely hard and abrasive, a classic material for a jaw crusher.
Basalt: A hard, dense volcanic rock used extensively in asphalt and concrete.
Gabbro & Diorite: Similar hard igneous rocks.
Quartzite: One of the hardest and most abrasive rocks, which jaw crushers are specifically built to handle.
Limestone & Dolomite: While less hard than granite, jaw crushers are frequently used as the primary breaker for large quarried blocks.
River Stone / Gravel: Hard, rounded, and often abrasive natural aggregates.
2. Mining Operations
In mining, the jaw crusher is the first step in comminution—the process of reducing the size of ore to liberate the valuable minerals from the waste rock.
Iron Ore: Crushing large chunks of ore like hematite and magnetite.
Copper Ore: Breaking down ores such as chalcopyrite and bornite.
Gold Ore: The initial crushing of hard rock ore before it goes to grinding mills.
Bauxite (Aluminum Ore): The primary crushing stage in aluminum production.Lead, Zinc, and Nickel Ores: Any hard rock ore that needs to be broken down for mineral processing.
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