STEEL BELT CONVEYORS FOR SEVERE CONDITIONS since 1929

Tenova Core

THE CHALLENGE

At the beginning of 2012,Tenova Core required a dependable system with low maintenance requirements to convey 200 t/h of heavy scraps in a tough environment. Tenova Core needed a solution for continuous fixed scrap volume layer loading, capable of to ensuring a remarkable reduction of the operating costs associated with the conventional furnace bay crane activities using charging buckets.
This new charging system was requested for Ivaco Rolling Mills.

 

THE CUSTOMER

Tenova Core is one of the most important worldwide suppliers of advanced technologies, products and engineering services for the Iron & Steel industries. The final Client, Ivaco Rolling Mills (IRM), is a steel recycling facility located on the banks of the Ottawa River in L’Orignal, Ontario (Canada) between Montreal and Ottawa.
Starting from the metal scraps, IRM produces steel billets and hot rolled wire rods to supply both domestic and international markets.

 

THE SOLUTION

Scrap metals are delivered to a huge bay located next to the melt shop. Generally, metal scraps come in two main grades: shredded and heavy large slabs and beams along with some direct reduced iron (DRI) or pig iron for electric arc furnace (EAF) chemical balance.
A Tenova steel slip-stick horizontal conveyor pre-heats and feeds the metallic charge to the EAF. Magaldi proposed the installation of two parallel Magaldi Superbelt® HD conveyors, “P” type -1,800 mm wide provided with pans made of 8 mm thickness Hardox400.
The unique damage-tolerant design of the Superbelt® allows the management of heavy loads and withstands the impact of big pieces whilst ensuring safe, continuous and reliable operation. The Superbelt® HD (Heavy Duty) is specifically designed to avoid any risk of sudden failures, often associated with conventional conveyors in the heavy scrap metal handling. Wear is negligible since material is slowly conveyed, with no relative motion against steel parts.
Moreover, the Magaldi Superbelt® is a steel belt made of partially overlapping steel pans bolted on a steel double-wire mesh, that form a virtually sealed conveyor belt The Superbelt® design is based on a multi-link concept. Even if the double-wire mesh is severely damaged, the conveyor continues to run without sudden failures and the plant operators can schedule its maintenance according to the operation needs.
Since May 2013, the Superbelt® HD conveyors have been feeding the metal scraps on to the downstream Tenova slip-stick conveyor with a throughput of 100t/h via batch loading through a weighing and loading device. Both conveyors are loaded by a magnet from the scrap bay through a receiving hopper fitted with hydraulic “clamshell” doors mounted right above the conveyor loading section. The hopper accommodates up to 5 tons (approx. 5cum) per shot each minute (i.e. the magnet cycle time) from a height of 1.2 meters approx. The cluster released by the magnet often contains large beams of 1.5x0.5x0.5meters and approx. 300 kg each. Therefore, the design of the Superbelt® HD loading section is very sturdy to withstand that tough scrap handling condition. Particular attention is given to unload the metal scraps onto the downstream slip-stick conveyor to ensure good feeding and operation of the EAF. This is the reason why the Superbelt® HD conveyors are provided with a frequency converter to adjust their speed. Moreover, the weighing device, installed upstream the Magaldi conveyors, provides the basic information to coordinate the EAF energy usage and the scrap feed rate.

 

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