Crusher and grinding mill wear parts include commonly-replaced components such as jaws, rolls, blades, plates, and liners for material processing equipment. Paired jaws are used in toggle or jaw crushers, powerful machines that fracture large rocks and reduce them to gravel or rock dust. Crusher rolls are used in roll crushers, compression-type machines that provide a fine product-size distribution and little dust. Typically, single or dual-roll crushers have rolls with teeth or raised forms. There are two types of crusher blades: rotary and fixed. Both are designed for high-speed operation, but require periodic sharpening. Crusher plates are used to process brick, coal, limestone, gravel, and other aggregate materials. They have straight, curved, smooth, or toothed jaws with either rounded or sharp-edged teeth. Crusher liners may be used with cone, jaw, roll, gyratory or horizontal shaft impact crushers. They are also used with hammermills.
Function and thickness are important specifications to consider when selecting crusher and grinding mill wear parts. Some products are designed to provide protection against abrasive, low-impact, or sliding wear. Others provide protection from objects that impact the surface. Crusher and grinding mill wear parts for erosion and wear protection can handle moving streams of abrasive grit, bulk crushed minerals, cement clinker, ceramic slurries, and coal ash. High-friction or non-slip components are also available. Functional features for crusher and grinding mill wear parts may include corrosion resistance and thermal resistance. Corrosive environments require protection from acidic, caustic, or chloride (marine solutions). Environments with high temperatures and fire require heat-resistant components.
Crusher and grinding mill wear parts are made of many different materials. Choices include basalt, carbide or hard metals such as silicon carbide or cemented tungsten carbide, and ceramic materials. Although many crusher and grinding mill wear parts are made of metal, plastic and rubber products are also available. Choices often include fluoropolymer, urethane, and polyurethane. Crusher and grinding mill wear parts that are made of specialty cements use advanced binder systems with potassium silicates, epoxy resins, and other polymer or chemical systems.
Suppliers of crusher and grinding mill wear parts may designate components such as jaws, rolls, blades, plates, and liners as suitable for use in specific industries. Applications include the cement or concrete industry, chemical processing, building and construction, furnaces and foundries, power generation, pulp and paper, manufacturing and machinery, mining, military, and the oil and gas industry. Crusher and grinding mill wear parts are also used in the steel or primary metals industry, and in some marine and aerospace applications.