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Michalcik R.,Buzzi Cement Hranice | Pasteka M.,R.Ø.S.A. | Durstberger H.,A TEC Production and Services GmbH
Cement International | Year: 2015

In June 2013, Buzzi Cement Hranice a.s., Czech Republic, awarded a contract to A TEC for an upgrade of the preheater and calciner of the clinker production line. The contract covered engineering, supply of equipment, steel structure, erection and civil works. Installations and start-up were in February 2014. The new calciner system, comprising a separate hot gas combustion chamber and an in-line calciner with a post combustion chamber, has a retention time of approximately seven seconds. This increased retention time accounts for the combustion of alternative fuels, allowing the use of up to 100 % of solid alternative fuel in the calciner. The new system will also lower the NOx levels, as well as reducing the specific heat consumption caused by the improved combustion behaviour in the calcination reactor. An A TEC Post Combustion Chamber (PCC) was installed at the top of the calcining system, ensuring increased retention time and enhanced gas mixing. Refuse-derived fuel (main burner quality), pulverized coal and animal meal are used at the existing main burner, in addition to natural gas for initial start-up only. The calciner includes three fuel input positions, with calciner-quality RDF-material entering the hot gas chamber from the input position at the top of the hot gas combustion chamber. The input location for shredded tyres was not changed, while the current calciner burner was moved from its existing position in the calciner. Tertiary air distribution and oxygen control are carried out by a number of automatic controlled dampers.


Koglbauer G.,A Tec Production And Services Gmbh | Gigacher W.,A Tec Production And Services Gmbh
Aufbereitungs-Technik/Mineral Processing | Year: 2010

For over 10 years now, A TEC has focussed on the use of cyclones in the cement pyroprocess and the associated processes. One example of the latter is the preliminary removal of dust from drying and working gases for mill processes. Besides the traditional cyclone designs, A TEC supplies special, optimized designs or cyclone systems, which have crucial advantages compared to traditional cyclones. Individual technological features of these special systems, e.g. guide vanes, can be used to optimize existing cyclone installations, as described in the following paper.


Kern S.,A TEC Production and Services GmbH | Salzer F.,W and P Zement GmbH | Reinhold H.,Industrial Minerals Scheuch GmbH
ZKG International | Year: 2015

The consortium of A TEC, W&P Zement and Scheuch, has set up an effective solution combining a high emission reduction of up to 80 % with minimized operating and investment costs, with the new ExMercury system. The consortium has set up the effective solution with the new ExMercury system, to address the challenge of anthropogenic mercury emissions in the cement industry. Mercury is classified as a pollutant due to its toxicity and its physical properties, as it forms a cycle in the atmosphere, leads to bioaccumulation and enters the food chain. These factors have driven the cement industry to introduce solutions, such as the Mercury is classified as a pollutant due to its toxicity and due to its physical properties as it forms a cycle in the atmosphere, leads to bioaccumulation and therefore enters the food chain. These factors have driven the cement industry to introduce new solutions, such as the ExMercury system, to limit the emission of this element.


Koglbauer G.,A TEC Production and Services GmbH | Gigacher W.,A TEC Production and Services GmbH
ZKG International | Year: 2010

Summary: For over 10 years now, ATEC has focussed on the use of cyclones in the cement pyroprocess and the associated processes. One example of the latter is the preliminary removal of dust from drying and working gases for mill processes. Besides the traditional cyclone designs, A TEC supplies special, optimized designs or cyclone systems, which have crucial advantages compared to traditional cyclones. Individual technological features of these special systems, e.g. guide vanes, can be used to optimize existing cyclone installations, as described in the following paper.


Sturm G.,A TEC Production and Services GmbH | Galichet B.,Holcim
Cement International | Year: 2012

A TEC Production & Service GmbH from Krems, Austria, together with Holcim Eastern Europe have developed a procedure for removing the salts from bypass dusts and have tested it successfully in a pilot plant. The trials started at the end of February 2011 and in June of the same year led to a contract with Holcim to supervise the development of the basic design for building an industrial plant for processing 20000 t/a bypass dust. The main stages of the process, named ReduDust, consist of mixing the bypass dust with water to produce a bypass dust slurry, filtration, chemical treatment and crystallization. This produces a filter cake from which at least 90 % of the chlorides have been removed and which can be returned, residue-free, to the cement production process. There are also saleable KCI or KCI/NaCI by-products. The successful testing of the ReduDust process developed jointly by A TEC and Holcim for processing and re-using the bypass dusts produced during cement production is an important and long-awaited development. It meets the needs of cement producers worldwide, especially in countries like Egypt, Iraq and Saudi Arabia where almost all the raw material resources have a high salt content. It also takes account of the growing trend, with the general aim of conserving resources, towards the use of secondary raw materials and fuels that often have a high content of harmful substances.

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