INCLINED CONVEYORS SAVE SPACE AND MONEY AT SOSSEGO
With a 26 m lifting height at a staggering 46° angle, the inclined conveyor solution provided by Metso Minerals Flexowell system has helped large Brazilian copper producer to save both space and money at its Sossego copper plant.
Brazil’s largest copper plant Sossego has started production following a record short planning and building phase; including the installation of a 26 m lifting height inclined conveyor at a steep 46° angle featuring Metso Minerals Flexowell conveyor system.
The inclined conveyor system was proposed to the owners CVRD by the main equipment and process knowledge supplier Metso Minerals as a means of reducing space; and thereby civil engineering, erection and electrical costs.
The Flexowell installation is part of the Sossego size-reduction programme.
After primary crushing, the copper ore is transported on conveyor belts to storage and fed to the 38’x23’ Metso Minerals SAG mill. The overflow from the SAG is returned for further reduction in a Nordberg cone crusher with the help of the Flexowell conveyor system.
The overflow has an estimated specific weight of 1,7 t/m3 and the Flexowell conveying solution has a projected capacity of 1228 t/ hour.
The conveyor is driven by a 200 hp motor, lifting the overflow material from the SAG mill at a speed of 1.5 m/sec.
Flexowell conveyor systems are designed to handle any slope angle of between 0º to 90°. At Sossego the angle is 46° with a lifting height of 26 m.
“An ordinary conveyor system would have meant a longer belt and a smaller angle. This would have taken more space and we recommended the inclined Flexowell solution instead,” says Carlos Ivan qui, Application Manager at Metso Minerals in Brazil.
He continues, “The total length of the installation is now only 36 m, from intake to discharge, and we were able to offer a very compact installation. The costs for the civil works were reduced, as were the costs for erection and electrical installations.”
The Flexowell conveyor belts consist of a cross-rigid belt with textile or steel cord reinforcements, corrugated sidewalls and transverse cleats preventing the conveyed material from sliding backwards.
The belt width at Sossego is 1400 mm with 400 mm high sidewalls and 360 mm high cleats. The sidewalls and cleat feet are cold vulcanised to the belt. The cleats are screwed to the sidewalls and can easily be replaced, as required.
Special care was taken to confine residual fines both on the discharging and return side of the conveyor. The residual fines are only approximately 1% of the volume moved but at large volumes they can pose a problem.
In this application, two small conveyors take care of the fines returning them to the Flexowell conveyor.
Metso Minerals’ Flexowell system was introduced to the Brazilian market about ten years ago in steel mills, coke plants, etc. It has proven to be a real alternative to conventional conveyor solutions and bucket elevators, since it is less noisy, needs less energy and demands less maintenance. It is also more flexible than bucket elevators as the discharge can be angled in relation to the loading point.
This latest development at Sossego is projected to produce 462,000 t of copper concentrate annually.
Inclined Conveyor System
INCLINED CONVEYORS SAVE SPACE AND MONEY AT SOSSEGO
With a 26 m lifting height at a staggering 46° angle, the inclined conveyor solution provided by Metso Minerals Flexowell system has helped large Brazilian copper producer to save both space and money at its Sossego copper plant.
Brazil’s largest copper plant Sossego has started production following a record short planning and building phase; including the installation of a 26 m lifting height inclined conveyor at a steep 46° angle featuring Metso Minerals Flexowell conveyor system.
The inclined conveyor system was proposed to the owners CVRD by the main equipment and process knowledge supplier Metso Minerals as a means of reducing space; and thereby civil engineering, erection and electrical costs.
The Flexowell installation is part of the Sossego size-reduction programme.
After primary crushing, the copper ore is transported on conveyor belts to storage and fed to the 38’x23’ Metso Minerals SAG mill. The overflow from the SAG is returned for further reduction in a Nordberg cone crusher with the help of the Flexowell conveyor system.
The overflow has an estimated specific weight of 1,7 t/m3 and the Flexowell conveying solution has a projected capacity of 1228 t/ hour.
The conveyor is driven by a 200 hp motor, lifting the overflow material from the SAG mill at a speed of 1.5 m/sec.
Flexowell conveyor systems are designed to handle any slope angle of between 0º to 90°. At Sossego the angle is 46° with a lifting height of 26 m.
“An ordinary conveyor system would have meant a longer belt and a smaller angle. This would have taken more space and we recommended the inclined Flexowell solution instead,” says Carlos Ivan qui, Application Manager at Metso Minerals in Brazil.
He continues, “The total length of the installation is now only 36 m, from intake to discharge, and we were able to offer a very compact installation. The costs for the civil works were reduced, as were the costs for erection and electrical installations.”
The Flexowell conveyor belts consist of a cross-rigid belt with textile or steel cord reinforcements, corrugated sidewalls and transverse cleats preventing the conveyed material from sliding backwards.
The belt width at Sossego is 1400 mm with 400 mm high sidewalls and 360 mm high cleats. The sidewalls and cleat feet are cold vulcanised to the belt. The cleats are screwed to the sidewalls and can easily be replaced, as required.
Special care was taken to confine residual fines both on the discharging and return side of the conveyor. The residual fines are only approximately 1% of the volume moved but at large volumes they can pose a problem.
In this application, two small conveyors take care of the fines returning them to the Flexowell conveyor.
Metso Minerals’ Flexowell system was introduced to the Brazilian market about ten years ago in steel mills, coke plants, etc. It has proven to be a real alternative to conventional conveyor solutions and bucket elevators, since it is less noisy, needs less energy and demands less maintenance. It is also more flexible than bucket elevators as the discharge can be angled in relation to the loading point.
This latest development at Sossego is projected to produce 462,000 t of copper concentrate annually.
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