Crushing and screening unit at Karelsky Okatysh JSC’s Western Quarry

Karelsky Okatysh JSC solved the problem of improving the quality of the roads in its Western quarry by installing a new crushing and screening unit with a stated capacity of 100,000 tonnes of crushed stone per month.

A similar plant is already operating in the Central quarry, but it does not have sufficient capacity to produce crushed stone for all the quarry roads. In addition, the Central quarry is located about 20 kilometres from the Western quarry, meaning additional costs for the transportation of crushed stone. The company’s management therefore decided to build a new crushing unit in the Western quarry.

“Our company was faced with the task of improving the quality of the roads, with the aim of increasing the service life of tipper truck tyres and ensuring the safety of traffic in the quarry in the winter,” said Albert Chigarkin, head of the Karelsky Okatysh JSC Dry Magnetic Separation Factory. “To do this, you need high-quality crushed stone, so we decided to build another crushed stone complex in the Western quarry. Sever Minerals, which Karelsky Okatysh JSC has been cooperating with for more than 10 years, was chosen as the contractor for this project.”

The resulting crushed stone, in three fractions, allows us to reduce Karelsky Okatysh JSC’s expenditure on quarry vehicle tyres, and also ensures that the quarry can function in winter under slippery conditions and in spring during floods.“

'We proposed a fully automated crushing and screening unit based on the Metso C106 jaw crusher and the Metso GP220 cone crusher, which allows us to ensure the consistently high quality of the crushed stone,” said Leading Engineer, Sever Minerals Equipment Department.

The design features of the equipment we proposed offer high reliability and low operating costs compared to similar units:

• • The frame of the jaw crusher is non-welded, which can significantly increase its reliability in variable load conditions and low temperatures;
• Just one type of jaw crusher bearings are used;
• • Installing cone crusher armour without the use of a compound significantly reduces downtime for refilling;
• The cone crusher oil station uses a single type of oil;
• Hydraulic adjustment of the discharge slot significantly improves the operation of the crusher.

Feed material: dry magnetic separation tailings, average to break, abrasiveness: high.

Customer: The Karelsky Okatysh JSC