The size requirement of the primary rock crusher is a function of grizzly openings, ore chute configuration, required throughput, ore moisture, and other factors. Usually, primary crushers are sized by the ability to accept the largest expected ore fragment. Jaw crushers are usually preferred as primary crushers in small installations due to the inherent mechanical simplicity and ease of operation of these machines. Additionally, jaw crushers wearing parts are relatively uncomplicated castings and tend to cost less per unit weight of metal than more complicated gyratory crusher castings. The primary crusher must be designed so that adequate surge capacity is present beneath the crusher. An ore stockpile after primary crushing is desirable but is not always possible to include in a compact design.
Many times the single heaviest equipment item in the entire plant is the primary crusher mainframe. The ability to transport the crusher main frame sometimes limits crusher size, particularly in remote locations having limited accessibility.
In a smaller installation, the crushing plant should be designed with the minimum number of required equipment items. Usually, a crushing plant that can process 1000s of metric tons per operating day will consist of a single primary crusher, a single screen, a single secondary cone crusher, and associated conveyor belts. The discharge from both primary and secondary crushers is directed to the screen. Screen oversize serves as feed to the secondary crusher while screen undersize is the finished product. For throughputs of 500 to 1,000 metric tons per operating day (usually 2 shifts), a closed circuit tertiary cone crusher is usually added to the crushing circuit outlined above. This approach, with the addition of a duplicate screen associated with the tertiary cone crusher, has proven to be effective even on ores having relatively high moisture contents. Provided screen decks are correctly selected, the moist fine material in the incoming ore tends to be removed in the screening stages and therefore does not enter into subsequent crushing units.
All crusher cavities and major ore transfer points should be equipped with a jib-type crane or hydraulic rock tongs to facilitate the removal of chokes. In addition, secondary crushers must be protected from tramp iron by suspended magnets or magnetic head pulleys. The location of these magnets should be such that recycling of magnetic material back into the system is not possible.
Crushing plants for the tonnages indicated may be considered to be standardized. It is not prudent to spend money researching crusher abrasion indices or determining operating kilowatt consumptions for the required particle size reduction in a proposed small crushing plant. Crushing installations usually are operated to produce the required mill tonnage at a specified size distribution under conditions of varying ore hardness by the variation of the number of operating hours per day. It is normal practice to generously size a small crushing plant so that the daily design crushing tonnage can be produced in one, or at most two, operating shifts per working day.
Many producers need to choose between production and mobility. The RM 100GO! mobile impact crusher weighs less than 75,000 lbs so that you get the freedom to do a wider variety of jobs from small single day jobs to large crushing jobs with a single machine.
The RM 100GO! features the RM proprietary impact crusher that achieves high outputs with a minimum footprint. The simple single-apron 3-stage crusher design allows for quick and easy adjustments and ensures you have got your settings right all the time.
RUBBLE MASTER took the compact design philosophy to a full size crusher. The RM 100GO! weighs fully loaded approx 75,000 lbs and is not considered a super-load in many States. Same size mobile impactors weigh in the excess of 95,000 lbs and require multiple loads or special permits to mobilize.
The RM 100GO! uses a proven and powerful diesel-electric drivetrain. Contrary to many traditional crusher manufacturers RUBBLE MASTER has been using this highly efficient drivetrain since our beginning in 1991 because of its many benefits over the lifetime of a machine.
As a contractor your need to deal with neighboring communities, construction related noise, traffic and construction site hazards. The RM 100GO! has a low profile on the job and doesn't require a lot of support equipment so that you get the freedom to utilize your crusher at more jobs without worrying about complaints.
Impact crusher is usually used as secondary or fine crusher in stone crushing plant. Within the working process of impact crusher, there might some situations and it's very important to know how to solve these problems. During this article, we'll introduce some common problems and solutions within the impact crusher.
Reasons and Solution: There might be several reasons cause the abnormal vibration of impact crusher. The first one is the raw materials are too big. The operator should check the feed size of raw materials and separate the bulk ones out. The second one is the unevenly worn of the blow bar. To solve this, the operator can replace the blow bar with a new one. The third reason is that the rotor loses balance and needed to be adjusted. The last one is that the base is unstable. The operator should check the foundation bolts and tighten them.
The gap between blow bar and impact plate is too big. The operator should adjust the gap size. Normally the gap size should between 15-20mm. The over-sized raw materials will also affect the final product size, so the raw materials should under the allowed ranges.
Reasons and solutions:The belt wears. To solve this problem, the operator should exchange the V-belt. The installation of the belt is improper. While installation the belt, the belt and the belt pulley should be in the same plane. Pay attention to the quality of the V-belt.
Solution: operators should turn off the power immediately, stop the machine and clean the crushing cavity to see if there is any materials that cannot be crushed enter the crushing cavity. The second might reason is that the impact plate falls down. To solve this problem, operators should stop the machine and fix the impact plate.
In order to solve such problems as low production efficiency and difficult installation and maintenance, ZENITH developed a new generation of jaw crusher--- C6X Series Jaw Crusher. It is the most ideal coarse crushing equipment on current market because a
As the new generation of crusher, PEW Series Jaw Crusher is born with innovative significance. The unique design concept makes this crusher achieve perfect combination between crushing efficiency and operating cost.
AMC Crusher is committed to the development goal of "first-class manufacturer of intelligent mining machinery" with advanced production equipment, high-quality core products and sincere after-sales service commitment. Read More >>
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AMC is committed to the development goal of "first-class manufacturer of intelligent mining machinery" with advanced production equipment, high-quality core products and sincere after-sales service commitment.Get in Touch with Mechanic