Hammer crusher and jaw crusher are common crushing equipment in the mine/building materials industry. They have large feed inlet and high crushing efficiency and are mainly used for coarse crushing of various ore materials. But they are different in many parts, which is better?
1. Different Appearance and Working Principle
The appearance and working principle of the 2 crushers are different. The jaw crusher is of the curved dynamic extrusion type, and the materials are crushed in the crushing cavity composed of the moving jaw and the fixed jaw. The hammer crusher is mainly broken by the impact, shear and tear of the rotating hammer head, the mutual impact between materials and the counterattack of the lining plate.
2. Different for Applicable Materials
Jaw crusher can crush all kinds of soft and hard materials with compressive strength between 300-350Mpa, such as granite, quartzite, diabase, pebble, iron ore, etc.
Hammer crusher is mainly used to crush ores with low hardness, and its compressive strength is generally lower than 200Mpa, such as limestone, bluestone, coal gangue, etc. When crushing hard materials, the hammer head is seriously worn and the cost of frequent replacement is high.
3. Different Discharging Adjustment Methods
The adjustment of the discharging granularity of the hammer crusher is realized by changing the bottom sieve plate. There are three adjustment modes of jaw crusher: base plate adjustment, wedge adjustment and hydraulic cylinder.
4. Different Structure and Wearing Parts
Hammer Crusher is mainly composed of casing, rotor, main shaft, lining plate and striking plate. Hammerhead is the key vulnerable part.
Jaw Crusehr is composed of frame, transmission device, adjusting device, tension device, safety device and lubrication system. The jaw plate is the main wearing part.
5. Different Configuration of Production Line
The content of needle pieces in the discharge of jaw crusher is relatively high, which needs to be shaped with impact crusher.
Hammer Crusher is mainly used in industrial secondary crusher, one-time forming, without secondary crushing and shaping process, so it is often used in small and medium-sized production lines.
6. Different Application of Aggregate Line
Hammer Crusher is rarely used in aggregate production line. Although the process is simple, the yield is low, it is easy to be over crushed, and there are many powdery materials. Moreover, the finished aggregate may have microcracks, low compressive strength, which will affect the quality of aggregate, sales and price. Therefore, it is often used as auxiliary sand making machine.
Jaw Crusher is often used as the coarse crushing equipment of aggregate production line, followed by impact crusher or cone crusher, and then added sand making machine (shaping machine) for shaping.
7. Which is Better, Hammer Crusher or Jaw Crusher
The main advantage of hammer crusher is that the ore with low hardness can be formed in one time. For the production line with output < 300t/h, a single hammer crusher can replace a jaw crusehr + a impact crusehr.
The main advantages of jaw crusehr are simple structure, convenient maintenance, high wear resistance, high cost performance, suitable for all kinds of hard ores. However, due to the high content of needle and flake aggregates in the discharge, it is necessary to cooperate with impact crusher for shaping.