Portal scraper for chrome ore to Kazakhstan

Early in 2012 SCHADE Lagertechnik is to deliver a portal scraper (rail track: 48 m, conveying capacity: 500 t/h) for chrome ore to JSC TNK Kazchrome. It will be employed in Aktobe near the Russian border, in north-west ­Kazakhstan. The ore deposits located there have attracted a few more important companies apart from JSC TNK ­Kazchrome. Kazchrome is part of the ENRC Group and is a major ferrochrome producer. The company operates several large ferrochrome plants in Kazakhstan.


The new portal scraper spans the stockpiled ore and travels back and forth longitudinally over the stockpile. In this instance and owing to the abrasivity of the material, SCHADE is employing a scraper chain furnished with a wing roller, the bearing being arranged directly on the shaft. The latter was especially developed for highly abrasive bulk materials. The drag link conveyor chain will be used in particular where chain lubrication is not permitted. It is furnished with hardened bolts and bushings which keep the wear factor at a low level. Each link of the bushed chain is additionally equipped with bearings and wing rollers which run in the chain guide. The rollers are furnished with bearings and special seals. An automatic chain tensioning device also ensures a low maintenance requirement. The drive shaft sits in sealed bearings and is fitted with two welded tumblers featuring exchangeable special steel tooth segments.


The portal scraper transports the bulk material away in layers from the side slope and guides it over a concrete ramp onto a belt conveyor which is arranged longitudinally adjacent to the stockpile. At the end of the bulk material stockpile the scraper boom lowers by a depth of cut. Then the scraper carries away the next layer in the opposing direction of travel. This process is repeated until the stockpile has been reclaimed in its entirety.


Reclamation takes place automatically, the cutting and grading of the stockpile is usually performed manually by the operators in Aktobe. During reclamation chains and drives run continuously whilst the angle of slope of the stockpile and the front ends of the stockyard are monitored automatically. This monitoring enables the scraper to travel up to the headwall, save for a minimal safety distance. Simultaneous monitoring of the angle of slope prevents the collapse of the side of the stockpile.



Related articles:

TILEMANN has record turnover with chains for semi-portal reclaimer

At the beginning of the year TILEMANN GmbH, specialist manufacturer of Bucket Elevator Chains, Scraper Chains and Conveyor Chains, continued its trend of strong business, in particular with Scraper...

Issue 2016-03

Relying on regularity

For almost 80 years, BEUMER has been developing tailor-made system solutions in conveying technology for the stone and quarry industry, power plant industry, mining (ores and coal) as well as the...

Issue 2012-03

Outokumpu’s Kemi mine set to double production

The only mine unit owned by Outokumpu, the chrome mine in Kemi, Northern Finland, is busy making preparations to double its production, set to begin next year. In co-operation with Metso, Outokumpu...

Issue 2010-12

Spotlight on countries in the CIS

In the first half of the decade, there was a great demand in Western Europe and Africa for allmineral’s innovative processing technology, but currently the spotlight is on countries in the CIS....

Issue 2019-04 FB Ketten

FB Ketten

H?andling of Powder and Bulk Solids place many demands on conveyor chains. Standard chains often do no achieve the long life and low maintenance required by modern production companies. With some...