June 2008, Volume 66, Issue 3 Aluminum

 

This month we are introducing a new template for Metal Minutes designed to make our newsletter faster to read and navigate.  Try it for the next two months, and in October you can let me know what you think.

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Thank you for reading Metal Minutes,

Beth Ryan, Editor
bryan@secowarwick.com

Case Study:
Miluo Longahou Aluminium China

SECO/WARWICK (Tianjin) Industrial furnace Co. Ltd. has recently completed the installation of a traveling homogenizing furnace at Miluo Longzhou Aluminium Co., Ltd., a specialty aluminium alloy billets manufacturer in Miluo Industrial Park, Hunan, China. The company operates a  50kt/a recycling aluminium alloy billet production line, which can produce 6000 series, 7000series and 2000 series of 152mm, 178mm, 254mm diameter extrusion aluminium alloy billets.

READ FULL TEXT ARTICLE

 

Aluminum News & Events

The Aluminum Association reports in their latest version of Aluminum Highlights (June 13,2008) that aluminum demand gloablly will increase by approximately 9%, despite the recession in the US economy. Nonetheless, siginificant industry sectors are off in the last quarter for the US. Click on the link below for more statistical information for North America.

READ MORE FROM THE ALUMINUM ASS. >>

Aluminum Industry Events - Mark your Calendar:

• Aluminium 2008, Essen Germany, Sept. 23-25
• Aluminum Furnace Seminar, Oct. 13-15
• Aluminum Ass. 75th Anniversary, Oct. 20-21

 

Use and Maintenance of Bypass Coolers

SECO/WARWICK provides an optional bypass cooler for annealing furnaces. Cooling  under a protective atmosphere for either metallurgical or handling considerations is very important in this application. The coolers use an internal bypass arrangement which limits the temperature of the atmosphere going through the heat exchangers to 350°F (177°).  Limiting the incoming temperature to 350º prevents baking mill oil and other deposits onto the coil fins.

Maintenance checklist for for coolers:

• Lubricate the bearings
• Be sure the 350 degree temperature control keeps working
• Be sure the water temperature control valve controls the water outlet temperature to not more than 120ºF (48°C).
• Be sure the oil drain trap is functioning to continuously drain all of the rolling mill oil that is driven out of the aluminum load and condensed in the cooler.  If oil does not drain, it will accumulate and could become an explosion hazard under certain conditions.
• Check water pressure drop through the coil and clean it if it starts to plug up.
• Check air pressures in the cooler.  There are pressure taps on the side of the cooler to measure internal pressure with a water manometer.  These pressures should be recorded when the unit is new.  Readings are taken before and after the filters and coils.  An increase in pressure drop indicates the need to replace the filters or clean the air side of the coils.

READ MORE MAINTENANCE TIPS>>

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