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A TEC Group

Name: A TEC Group
Address: Finkensteiner Straße 9, Gödersdorf, 9585, AT
Telephone: +43 4257 3600

A TEC - A Member of LOESCHE Family When it comes to outstanding technological performance, you need experts who think ahead.

Innovators who always go a step further. Significant efficiency improvements, sustainable cuts in energy consumption, compliance with or even overachievement of environmental limits - our solutions give a competitive edge to our customers. Impressum:
http://www.atec-ltd.com/meta/impressum.html

16/07/2026

When it comes to low-clinker cement, the conversation starts with material selection. Which SCMs are available? Which ones deliver the required performance?

From an engineering perspective, process design begins with the production system that will handle them.

Cement plants commissioned today will operate for decades, while the portfolio of supplementary cementitious materials will continue to evolve, introducing new materials with distinct thermal, mechanical and process requirements.

Accommodating that diversity calls for a production system designed to accommodate those changes throughout the entire process, from heat treatment and gas flow to grinding and material transport.

As fly ash and granulated blast-furnace slag become less available, the industry will continue to evaluate new supplementary cementitious materials. Plants capable of accommodating different thermal and mechanical material characteristics can integrate those materials with fewer process modifications, supporting a continuous transition toward lower-clinker cement.

08/07/2026

In a preheater tower, each cyclone stage separates raw meal from hot process gas as the material moves downward toward the lower preheater and calciner. At the same time, hot process gas moves upward, transferring heat to the incoming feed. This repeated gas path creates a cumulative pressure drop across the system. By the time the gas stream reaches the induced draft fan, the fan must compensate for the pressure losses across every stage, making every millibar of pressure drop part of the plant's continuous electrical demand.

Because gas-flow aerodynamics and plant power consumption are closely linked, cyclone design plays a direct role in long-term operating efficiency. The internal flow path, vessel proportions, inlet arrangement and outlet configuration all contribute to the pressure drop at each preheater level.

HURRICLON® cyclones and HURRIVANE® venturi systems are designed to reduce pressure drop while maintaining high collection efficiency. According to A TEC data, these combined systems can reduce pressure drop by up to 50% compared with conventional cyclone designs while increasing collection efficiency. Over thousands of operating hours, these aerodynamic improvements reduce the electrical demand of the induced draft fan while maintaining high particle-separation efficiency.

30/06/2026

Beyond the Burner: The Fluid Dynamics of Pyroprocessing Efficiency

The conditions created at one transfer point in the pyroprocess become the starting point for the next. Understanding these relationships helps identify where an improvement will have the greatest effect.

☑️ Splash Box
Heat exchange in the preheater begins with the way raw meal enters the riser duct. The Splash Box redistributes the material across the gas stream, increasing contact between particles and hot gases. A more uniform distribution improves heat transfer, stabilizes the pressure profile, and reduces material fall-through.

☑️ Pendulum Flap
The Pendulum Flap allows material to pass while preventing counter gas flow through the meal pipe. This preserves cyclone separation efficiency and limits unnecessary dust recirculation.

☑️ Tertiary Air Duct Gate
The TAD Gate regulates the air supplied to the calciner. Stable tertiary air control maintains consistent combustion conditions and supports fuel burnout before gases enter the downstream preheater stages.

☑️ Kiln Inlet Seal
False air at the kiln inlet increases the energy required to maintain process temperatures. The Kiln Inlet Seal limits air ingress while accommodating kiln movement, helping maintain the intended thermal conditions within the system.

Process stability is built through hundreds of interactions within the pyroprocess. Understanding how those interactions connect provides a clearer path to lasting improvements.

24/06/2026

Every material responds to heat in its own way.

In cement production, the pyroprocess is where raw meal passes through a sequence of carefully controlled thermal and chemical reactions. Temperature plays an important role, but temperature alone does not determine the outcome. The way heat moves through the system and interacts with the material has an equally important influence on how these reactions take place.

This is why pyroprocess engineering is not limited to reaching a target temperature. The objective is to establish stable process conditions where heat is transferred efficiently and consistently throughout the system.

Over the past decades, engineering experience and increasingly detailed process data have provided a clearer understanding of how thermal systems behave under operating conditions. A deeper understanding of the existing process creates new possibilities for improvement. Each refinement builds on this knowledge, improving processes and making them more efficient.

Pyroprocessing remains one of the most fascinating aspects of cement manufacturing because it brings chemistry, physics, and engineering together in a continuous process where the effects of each operating condition can be observed throughout the system.

17/06/2026

The efficiency of a preheater tower depends on its temperature, cyclone design, and heat recovery. However, the process also depends on how material flows from one step to the next.

Raw meal follows a carefully designed path, and every transfer point influences its interaction with the gas stream and the exchange of heat throughout the tower.

At each transfer point, the material moves downward through the system while hot gases travel in the opposite direction. Process design determines where these flows remain separated and where they come into contact.

One example is the meal leaving a cyclone. As it moves toward the next stage, the Pendulum Flap helps maintain the separation between the meal and gas flows. Before entering the riser duct, the Splash Box redistributes the meal across the gas stream to improve heat exchange conditions. These two components are positioned only a few meters apart and work together to improve the movement of material through the preheater and the transfer of available heat to the raw meal.

11/06/2026

Modernizing a cement plant means working within a structure that has its own history, physical layout, and daily operational routine. The most important aspect of a brownfield upgrade is treating the existing configuration as an active blueprint.

When a plant adopts advanced systems to handle alternative fuels, the engineering task becomes an exercise in structural adaptation. Designers must determine how new process equipment, bypass systems, or fuel preparation units can be integrated into a preheater tower built decades ago without provisions for these additions. It is a three-dimensional puzzle, where process requirements, structural constraints, maintenance access, and available space must all fit within the existing facility.

The environment, therefore, requires an independent, analytical assessment before any equipment is selected. Detailed on-site audits and process simulations identify where new technology can be integrated into the existing process. This initial consulting stage reveals the potential of the current layout, allowing future improvements to be implemented where they deliver the greatest operational benefit.

04/06/2026

For decades, progress in cement production has been closely tied to new equipment, fuels, and processes. However, some of the most interesting opportunities are found by viewing the plant from a new perspective.

When a dust stream no longer leaves the process but becomes a source of information about internal cycles and process behaviour, or when waste heat, under the right conditions, can support additional process steps, fluctuations in temperature or pressure become clear data points that reveal how the system responds to changing conditions.

As plants work with more diverse fuels and more complex material streams, the work lies in understanding the interactions that already exist inside the process and identifying where technology creates the greatest benefit within the existing plant footprint.

Working from the inside out, sustainability becomes as much a matter of process interpretation as process modification. Materials that were once discarded re-enter the production cycle, allowing energy to serve more purposes before leaving the system. A targeted upgrade, integrated at the right location and for the right purpose, stabilizes operation within the existing plant footprint.

27/05/2026

Modernizing a cement plant means working within a structure that has its own history, physical layout, and daily operational rhythm. The most important aspect of a brownfield upgrade is respecting the existing configuration.

When a plant introduces advanced systems to handle alternative fuels, the engineering task becomes deeply rooted in the work of the on-site team. Designers must figure out how to integrate massive new components, such as high-efficiency bypass ducts or processing units, into a preheater tower that was built decades ago with no provisions for such additions. It is a three-dimensional puzzle where any missteps are reflected in costly downtime.

Thus, this environment requires an independent, analytical view before any equipment is chosen.

Detailed on-site audits and process simulations identify the intersection points where new technology can join the established path. This early consulting stage uncovers the hidden capacity of the existing layout, allowing for maximum future operational flexibility and minimum structural modifications. A plant can transition to its new capabilities with ease when teams install the equipment during a brief, scheduled shutdown, maintaining production right up to the shutdown window.

Our Consulting & Engineering solutions. ⟶ https://www.atec-ltd.com/en/consulting/consulting-service.html

19/05/2026

Inside a cement kiln, chlorine evaporates largely in the kiln before moving with the gas stream toward the calciner and preheater, where it condenses on the raw meal. Over time, chlorine concentrates in the hot meal and kiln inlet zone.

At Vicat’s Peille plant in France, A TEC installed a chlorine bypass system that extracts kiln gas directly from the riser. The gas cools rapidly enough that chlorine compounds condense onto dust particles before returning into circulation. The system was designed to fit within the layout of a kiln line built in the 1970s. Laser scans guided the placement of the ducts, cooling equipment, and transport routes inside the existing structure.

Read the full article here ⟶https://atec-ltd.com/images/Articles/REPRINT_2026-05_HR_ATEC_Chlorine_bypass_3p_MB_RH48.pdf

13/05/2026

The nature of plant modernization is revealed under the pressure of annual shutdown planning. The most lasting performance gains come from interventions chosen at the right moment and in the right sequence as part of a long-term strategy.

A cement plant matures through accumulation. One year, the bypass is adapted to improve chlorine control and support alternative fuel use. The following year, the tertiary air system is modified to stabilize combustion under changing thermal conditions. Later, the cyclone geometry, duct routing, kiln inlet design, and meal distribution are adjusted to reduce pressure losses, improve separation efficiency, and optimize pyroprocess performance.

Modernizing the plant then becomes a matter of identifying the most pressing bottleneck at each stage of production and deciding which intervention will deliver the greatest improvement to the processes of heat transfer, gas flow, residence time, dust circulation, and combustion stability. When this decision is well-informed, a maintenance stop becomes a tactical opportunity to implement modifications based on process analysis, operating data, and simulation, aligning investment with production realities and implementation windows.

This layered procedure increases efficiency by progressing through clear stages: planned outages, careful budgeting, and upgrades that build on each other. Thus, modernization is a long-term engineering effort in which timing, order, and understanding the system are as important as the equipment itself.

Adresse

Finkensteiner Straße 9
Gödersdorf
9585

Öffnungszeiten

Montag	08:00 - 18:00
Dienstag	10:00 - 18:00
Mittwoch	10:00 - 18:00
Donnerstag	10:00 - 18:00
Freitag	10:00 - 18:00

Telefon

+43 4257 3600

Webseite

http://www.atec-ltd.com/

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