Pit & Quarry, September 2012

CRUSHING APAC Mid South Inc uses two identical Kodiak Plus K300 cone crushers cludes automatic tramp iron relief The automation controls allow the operator to monitor the operation of the cone and to operate the cone at peak efficiency and capacity According to KPI JCI the Kodiak is the heaviest cone crusher on the market Also its balanced operating design allows it to work on old stationary structures and portable plants Part of the reason APAC Mid South chose KPI JCI is because of the companys ability to provide a range of aggregate processing equipment as well as a single source supply for its customers We appreciated the fact that we could purchase both units from the same company says Sam Reed APAC Mid South vice president APAC Mid South first replaced the old style secondary cone crusher with the Kodiak Plus K300 which improved plant production and uptime Next APAC Mid South replaced the tertiary impact crusher with a new Kodiak Plus K300 and found it was making 50 percent more 1 2 in and 3 8 in rock than before The Kodiak Plus K300 that replaced a tertiary impact crusher made 50 percent more 1 2 in and 3 8 in rock The two Kodiak Plus K300 cone crushers are actually identical units except for liner configurations The Kodiak cones are available with a wide range of liner choices which make them versatile and allow them to be used in primary secondary and tertiary applications The new KPI JCI 8 ft x 20 ft tripledeck dry screen was also installed and it improved screening performance It also handled the companys increased tonnage A new KPI JCI 8 ft x 20 ft tripledeck wash screen was later installed Another sites dilemma In another quarry 50 miles away in Alexander City Ala APAC Mid South was determining which manufacturer to use to replace an old cone crusher But instead of crushing limestone the company needed to crush granite And it wasnt sure if a roller bearing cone crusher could perform well in a granite quarry It takes a really good crusher to crush granite Reed says To be honest roller bearing cones just dont enjoy the same perception as bronze bushings in the South so we were hesitant to try it in a different application But it was a great guarantee we knew if it didnt work out KPI JCI was going to take care of it The misconception that roller bearing technology is inferior to bushing designs is one that is often purported by manufacturers But there are significant advantages to how a roller bearing absorbs crushing loads versus sleeve bushings KPI JCI says including A 360 degree loading situation with millions of points of contact that are constantly changing Higher productivity with a lower cost of ownership More saleable net product and more efficient power consumption The ability to run at higher operating temperatures thus requiring less oil conditioning Longer life of wear parts which ultimately reduces the cost in replacement parts We have put our roller bearing cone crushers in a variety of hard rock applications and they have excelled in each one Luadzers says The reality is that the Kodiak is well suited for the Southeast and elsewhere as it is the heaviest built cone crusher has the widest temperature operating range the most productive and balanced design automation controls and standard antispin design For a complete technical overview on the differences between roller bearing technology and bushing designs see the sidebar Roller bearing versus bushing design on the next page Exceeding expectations To familiarize itself with the Kodiak Many of the new bushing designs use a steep chamber coupled with a high operating speed and aggressive stroke A steeper head angle causes material to travel through the cavity faster thereby requiring a higher operating speed to enable the machine to maintain the required reduction 30 PIT QUARRY September 2012 www pitandquarry com