Raw meal and secondary fuel metering in the cement industry

Summary: In 2007, the worldwide production output of cement rose to approx. 2.7 billion t and will continue to grow. Thus, the market often demands high output rates in combination with reliable operation and high plant availability. High output rates in ­
cement production plants mean that the conveying devices, e.  g. rotary airlocks also have to achieve high throughput rates while ­meeting the high availability requirements through the use of suitable wear protection and servicing concepts. JAUDT achieves the demanded high throughput rates with its new rotary airlock series of the type XXL. This begins with a nominal width of 700 x 700 mm, overall height 1000 mm and a conveying capacity of 230 t/h/(bulk density of raw meal = 0.7 kg/l) and ends with the nominal width 1300 x 1300 mm, overall height 1800 mm and a conveying capacity of 980 t/h. They can also be used  for metering secondary fuels.

1 The use of rotary vane feeders in the cement industry

In the cement industry, rotary vane feeders are employed as continuous discharge devices or metering devices operating as a rotary vane feeder under slight negative pressure or overpressure. Rotary vane feeders are suitable for the metered discharging of a wide range of free-flowing bulk materials at very high volumetric rates from conveyors or from stored quantities in bins, hoppers or silos and suffer only a small amount of wear. The advantage of rotary vane feeders lies in their relatively small construction size and high conveying...

Related articles:

Issue 2009-06-07

Efficient injection of secondary fuels

Secondary fuels are being used with increasing frequency in the cement industry. However, the fact that they have significantly different properties from other bulk materials is often ignored, which...

more
Issue 2010-04

Brabender Technologie KG

Now a traditional exhibitor at POWTECH, Brabender Technologie KG, Duisburg, will again be showcasing its latest developments and a cross-section from its extensive range of equipment for feeding and...

more
Issue 2009-10

Patented wear protection for improved cost efficiency

Conveying wear-intensive bulk solids is an issue in many industry sectors. Particles are conveyed much faster in dilute phase conveying. Here lower quantities of bulk solids are conveyed with a high...

more
Issue 2009-12

Apron feeder with arched plates for limestone transport

Barely one year after the takeover of the Holcim subsidiary in Venezuela by the state, investments are made to ensure the proper functioning of the system in the South American plant: The responsible...

more
Issue 2013-12

Wear-protected rotary valve for 60 t/h dry lignite

Coperion GmbH from Weingarten/Germany recently supplied and successfully commissioned a wear-protected rotary valve for the RWE Power AG Ville/Berrenrath, Germany coal refinery. The rotary valve type...

more