The Journey of the Stone Crusher
Stone crushers have played a pivotal role in the history of America since its creation in the mid-1800s. Since then, millions of tons of stone have been crushed to make everything from houses to roads and everything in between. The first stone crusher was invented by Eli Whitney Blake, the nephew of Eli Whitney, the creator of the cotton gin. After five years, Blake’s stone crusher roared to life, thanks in part to a challenge laid before him by the town of Westville, Connecticut. The purpose was to put down a rock surface on the roads so wagons wouldn’t get stuck in the mud. Blake went further with the design and developed it for the railroads to create ballast.
According to the industry, It’s no easy feat turning giant walls of stone into small uniform rocks. Take the Metso Minerals 4265 Superior Gyratory Crusher, for example. It’s total weight of 264,000 pounds is housed in a 10-story high reinforced steal tower. The powerhouse is pushed by a 500-horsepower electric motor. Because of that, the gyratory crusher is capable of handling 2,557 tons of stone per hour.
All crushers are designed to work in the choke-fed position because the rocks on top of the crusher help push down the rocks through the crushing chamber. The rocks will crush against themselves. That’s called rock-on-rock crushing. Larger crushers can handle rocks up to 3 feet in diameter. Anything bigger gets broken up by a hydraulic hammer.
The main shaft of the Metso 42X65 crusher weighs 52,000 pounds. As the main shaft rotates, it moves in an eccentric pattern, which crushes the rocks. It rotates 170 times a minute against the chamber walls which are solid, reinforced steel. According to Blake, there are probably . Some can be as small as 2 feet in size and some could go as large as 10 feet. Depending on the desired product, the stones can travel through three or four different types of stone crushers.
Said, Blake said he wouldn’t classify the stone crushers as being unsafe or hazardous, thanks in large part to safety procedures and new technology. “Today, some of the technology that’s available is quite amazing,” said Blake. “The technology today checks the temperature of bearings and measures the overall force of the crusher. One dangerous event is when uncrushable materials - such as a piece of wood, rubber, or steel - enters the crusher. When that happens, today's crushers have a built-in safety mechanism as to not damage a shaft or bearing." The size of the crusher machines has changed, but the general principle has not changed since the late 1800s.Back to news