TELSCHIG:

Efficient Cement Handling on Building Sites Throughout the World

More than 2.4 billion tonnes of cement are produced and processed worldwide every year. There is strong demand for reliable and innovative cement handling plant. The German company TELSCHIG is established as one of the world’s few specialists in planning and constructing such plant, with more than 30 years’ experience in the field. Wherever cement is processed, TELSCHIG is to be found.

Abu Dhabi: The thermometer is reading well over 40 degrees C. The oppressive heat makes all exertion punishing. But this building site on the edge of town is a hive of activity. 75 cubic metres of green concrete is produced and processed here every hour. The concrete mixing plant needs about 25 tonnes of cement every 60 minutes. This is a real challenge for the cement handling system. “The emptying and conveying rate of a cement handling plant relates to the capacity of the concrete mixing plant and of the cement content this requires”, observes Horst Telschig, Managing Director of TELSCHIG Verfahrenstechnik GmbH, commenting on the logistical principle. This German plant engineering company has a wealth of experience, with TELSCHIG cement handling plant in service all over the world wherever cement and other mineral raw materials are processed. The company is located in Murrhardt near Stuttgart in Germany, and has been engaged in plant engineering since 1973. Over the years the company has increasingly specialized in the storage, transport and handling of bulk materials in a wide range of industries. In 1975 TELSCHIG became involved in designing, engineering, producing and marketing cement-handling plant for use on building sites. TELSCHIG now operates worldwide, and is considered to be one of the technology leaders in this field.

Cement handling plant has to satisfy the most diverse requirements. Building sites are often located in regions with minimal infrastructure. There are often no bulk transport vehicles or suitable roads to transport cement. Alternatives are needed in such circumstances. “Cement production worldwide is about 2.2 million tonnes a year. About 35 to 40 percent of this is filled into bags, about 10 to 20 percent into Big Bags, containers with a capacity of one to one and a half tonnes, and the rest comes directly in bulk transport vehicles or railway trucks”, explains Horst Telschig. The material often then has to be transported over several hundred kilometres to the building site. When the bags, Big Bags, bulk containers or railway trucks arrive, these diverse containers have to be discharged on site into the storage or working silos near the cement mixing plant – eliminating dust as far as possible.

TELSCHIG responds to these multiple challenges and changing conditions by developing standardized emptying and conveying systems with a capacity of 10, 18, 25, 35 and 55 tonnes an hour. The maximum feed paths of the standard equipment is 20 metres horizontally and vertically. “For larger distances we design special equipment, based on proven components”, says Horst Telschig. The material can be emptied by machine or by hand, depending on the weight of the bags. Small containers weighing 25 to 50 kilograms can be emptied manually with a throughput of up to about 400 bags an hour, with adequate manning. For throughputs above that the TELSCHIG experts recommend automatic bag emptying. There are bag-emptying machines for this, which are generally used for bagged material. The rate of Big Bag emptying and opening relates to the handling process on site. “We generally find it takes about three minutes to handle a Big Bag, i.e. to transport it to the emptying point, open it, empty it and dispose of the empty Big Bag, says Mr Telschig. So it is possible to empty about 20 or even 25 Big Bags an hour per station. With a capacity of one to one and a half tonnes per Big Bag, this makes a total throughput of 20 to 30 tonnes an hour.

On building sites in geographically inaccessible regions, it is often not possible to provide a continuous supply of cement, so additional storage capacity has to be created in the form of storage silos. The cement is conveyed from the storage silos to the working silos near the cement mixing plant via pneumatic systems. TELSCHIG has developed a completely standardized range of plant and machinery to optimize both performance and economy. TELSCHIG ensures reliable operation of the pneumatic cement handling plant by air fluidizing to keep the pipework clear and prevent deposits accumulating.

The individual plant components can be combined simply and easily as required, to form perfectly balanced systems. The interfaces are designed to provide rapid solutions to match the task and the conditions, without the need for costly modifications. Horst Telschig comments, “Our range offers specific solutions and sets the highest standards based on an internationally proven technological standard and the many years’ experience of our engineers and staff”.

Another special feature of TELSCHIG plant and machinery systems is their multifunctionality. For example the various parts and components can also be used for all other the mineral raw materials that arise in the construction industry, such as lime, gypsum, fly ash, bentonite, micro silica, pozzolanic material, etc. The TELSCHIG component system can be used for any application involving fluid and free-flowing bulk materials with a bulk density of 0.6 to 2.0 kilograms per litre, and with a grain size not exceeding 1.0 millimetres. This flexibility in use provides significant economic benefits.

Photo 1:

Automatic bag emptying system

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telschig_1 (JPG)

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