The vertical shaft rotor crusher utilizing “Air Cushion Bearing” technology developed in Russia can crush stones into sand, producing particles smaller than 5mm with uniform size…
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Artificial sand produced from the crusher |
To address the shortage of construction sand, approximately 20 years ago, vertical shaft rotor crushers were commonly used to crush stones into sand (referred to as artificial sand). The first generation of these devices was the vertical shaft rotor crusher using conventional ball bearings.
Recently, in Russia, vertical shaft rotor crushers utilizing “Air Cushion Bearing” technology have emerged. This is the most advanced generation of stone-to-sand crushing equipment currently available. While traditional vertical shaft rotor crushers use regular ball bearings, those employing “Air Cushion Bearing” technology operate on the principle of air cushion balancing the axial forces of the rotor, eliminating direct friction and thereby achieving sand production efficiency that is twice that of ball bearing technology. These crushers, using air cushion technology, operate stably with impact speeds of up to 120m/s, capable of producing sand particles smaller than 5mm, with uniform size and spherical shape.
The production cost of artificial sand using “Air Cushion Bearing” technology is about ten times cheaper compared to equipment using conventional ball bearings. Additionally, devices using air cushion bearings allow input stones to be freely sized up to 70mm. The vertical shaft rotor crusher achieves a sand yield ratio of up to 48%, while ball bearing devices only achieve about 25%.
The quality and composition of artificial sand produced by the vertical shaft rotor crusher meets the requirements for manufacturing various types of concrete.
The production cost of this type of stone is approximately 60,000 VND/m3.
Currently, these devices are widely used in the Russian Federation, CIS countries, and have been exported to Western Europe, gradually replacing the generation of equipment utilizing bearing technology.
Viet Phu
