Gyratory Crusher

Primary Gyratory Crusher

High Performance GY Series

A gyratory crusher is one of the main types of primary crushers in a mine or ore processing plant. Gyratory crushers are designated in size either by the gape and mantle diameter or by the size of the receiving opening. Gyratory crushers can be used for primary or secondary crushing.

The crushing action is caused by the closing of the gap between the mantle line (movable) mounted on the central vertical spindle and the concave liners (fixed) mounted on the main frame of the crusher. The gap is opened and closed by an eccentric on the bottom of the spindle that causes the central vertical spindle to gyrate. The vertical spindle is free to rotate around its own axis. The crusher illustrated is a short-shaft suspended spindle type, meaning that the main shaft is suspended at the top and that the eccentric is mounted above the gear. The short-shaft design has superseded the long-shaft design in which the eccentric is mounted below the gear.

Features and Benefits

  • Equipped with a balance cylinder that is designed to prevent damage to the step bearing should shaft jump occur.
  • To maximize the fatigue life of the main shaft, a sleeve is used to eliminate the use of a screw thread in the area where the mantle is attached. This area is also where the maximum bending moment occurs in the main shafts of primary gyratory crushers during operation.
  • ETCL has perfected a technique whereby the vertical position of the main shaft can be determined. This facility enables the user to have a digital readout of the setting of the machine at the operator’s console, either in field or remotely.
  • As part of the local gap setting panel, a set of graphs is provided from which the remaining liner life can easily be determined.
  • Depending on the type of material to be processed, the primary gyratory crushers are offered with either smooth or grooved mantles. Grooves are usually used for the processing of harder materials. Furthermore, high chrome liners or liners with high chrome inserts can be used on the lower row of concave liners. This results in excellent nipping of material and increases wear life (increases of 3 to 5 times in liner life can be achieved).
  • Dust sealing of the area between the main shaft assembly and the eccentric assembly is achieved by means of a combination of a mechanical seal and overpressure supplied by means of a vortex blower. Pre-filtration of the air going to the vortex blower can be done according to specific customer requirements.
  • Due to the use of a hydraulic main shaft support mechanism, the GY primary gyratory crusher can be started under full load should it be required; e.g., in the case of an unplanned power failure.
  • The spider arms are an integral part of the spider assembly. The spider assembly, which is a one-piece casting, is specifically designed to ensure adequate rigidity when crushing large, hard rocks in the upper region of the crushing chamber.
  • Major components can be divided to ease transport restrictions; i.e., spider 3 pieces, top frame 2 pieces each for upper and lower, bottom frame 3 pieces.
Spec Table – Gyratory Crusher
APKM Diagram
 

Gyratory Crusher Specifications

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Crusher Size Feed Opening x Mantle Dia (inch) Allowable Max Feed Size (inch) Speed of Pinion Shaft (rpm) Gyration per minute (gpm) Eccentric Throw (inch) Motor Power (Hp) Mass (ton)
42 – 65 43″ x65″ 28″ x 37″ x 55″ 497 150 1″ 300 129
1.25″ 350
1.5″ 400
54 – 74 54″ x 74″ 35″ x 47″ x 71″ 497 135 1″ 300 255
1.25″ 400
1.5″ 450
1.6875″ 500
60 – 89 60″ x 89″ 39″ x 53″ x 79″ 497 125 1″ 350 440
1.25″ 400
1.375″ 450
1.5″ 500
1.75″ 600
60 – 109 60″ x 109″ 39″ x 53″ x 79″ 497 110 1″ 500 645
1.25″ 600
1.5″ 750
1.75″ 900
2″ 1000
 

Gyratory Crusher Throughput Capacity

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Crusher Size Eccentric Throw (inch) Reference Throughput Capcity (stph) Discharge Setting (Open Side Setting: OSS) (inch)
4.5″ 5″ 5.5″ 6″ 6.5″ 7″ 7.5″ 8″ 8.5″ 9″ 9.5″ 10″ 10.5″ 11″ 11.5″
42 – 65 1″ 915 1031 1157 1278 1499 1697
1.25″ 1069 1223 1355 1510 1763 2006
1.5″ 1234 1400 1576 1741 2039 2314
54 – 74 1″ 1499 1620 1763 1862 2006 2116
1.25″ 2039 2226 2392 2546 2733 2887
1.5″ 2314 2513 2711 2887 3174 3273
1.6875″ 2513 2733 2942 3152 3361 3559
60 – 89 1″ 2017 2160 2303 2502 2634 2777 2920
1.25″ 2325 2480 2656 2887 3042 3196 3361
1.375″ 2656 2821 3009 3273 3460 3626 3813
1.5″ 2887 3075 3273 3560 3747 3945 4155
1.75″ 3504 3736 3978 4331 4562 4794 5047
60 – 109 1″ 2468 2612 2744 2964 3196 3405 3626 3846 4077 4320
1.25″ 2975 3196 3361 3615 3868 4155 4408 4695 4948 5246
1.5″ 3637 4133 4166 4485 4827 5168 5488 5830 6171 6546
1.75″ 4320 4628 4860 5212 5598 5984 6392 6777 7163 7593
2″ 5025 5400 5642 6017 6469 6910 7361 7802 8254 8750
Note:
  1. Capacity shown is based on an assumed feed distribution which 100% of feed passes 90% of feed opening and 80% of feed passes 42% of feed opening.
  2. Capacity shown is based on continuous feed of typical limestone or similar with a bulk density of 100 lb/ft3 minimum clay and moisture.
  3. Actual capacity may vary due to characteristics and conditions of feed material (such as compressive strength, size distribution, etc.).
  4. For operation in parentheses condition, consult IMS.
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