The primary crushers are designed for the coarse crushing of ores and rock products at the first crushing stage. the secondary coarse crushers are designed for the installation after primary crushers in 4-stage crushing lines. due to their high reduction ratio they allow significantly increasing the efficiency of secondary and tertiary5 rows the primary coal crushers may be of different types such as 1 coal jaw, 2 coal hammer, and Jul 24, 2015 again the ore will come from a primary crusher and be scalped. the coarse material will be crushed by the secondary crusher. the fines will be taken out of the circuit. once the secondary has finished with the ore it will be reclassified by a second set of Dec 23, 2015 how you select your primary crusher will be based on factors like moisture content, maximum rock lump size, material density sg, abrasion index, degradability and it being prone to dusting or not. the crusher capacities given by manufacturers are typically in tons of 2,000 lbs. and are based on crushing limestone weighing loose about 2,700 lbs. per yard3 and having a specific gravity of 2.6.Primary secondary tertiary crusher types chart primary secondary tertiary crushing mills crusher ritchiewiki nov 19 2009 the hammer mill crusher first appeared in 1920 and was used to the crushing of materials occurs in three stages primary secondary also known as a reduction crusher the cone crusher is a secondary or tertiary.Primary crusher sendary crusher and tertiary crusher. aggregate crushing plant soft stone usually refers to the stone like limestone marble talc gypsum calcite phosphorite etc the classic production line for the soft stone is jaw crusher primary crusher impact crusher secondary crusher and with the auxiliaries of vibrating feeder vibrating screen beltDifference between primary secondary and tertiary crushers . difference between primary and secondary crushers primary gyratory crushers form a critical transition between the mine or quarry and the plant make a significant difference it is the combined design that sets the cg series apart from enith leverages its strength in secondary and tertiary.