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quadropol® - vertical roller mill

thyssenkrupp is one of the few full-range suppliers for the cement industry – from individual machines, all the way up to complete cement plants, and this since decades. The market requirement is easy to define. Present kiln lines have capacities of up to 10,000 tons per day. Kiln lines of 12,000 tons per day were already built by polysius® technology.

polysius provided the latest equipment technology for the plant and as a result the Oruro works is one of the most modern cement facilities in Latin America.

International Cement Review January 2020

„The making of Oruro“ by Cementos de Bolivia and PEC Consulting Group, USA

The quadropol® - advantages at a glance

  • Lower construction costs

  • Easier maintenance

  • Lowest level of vibration (< 2.0 mm/s)

  • Highest level of digitalization

Extract of our references


Cemento Progreso, Guatemala, 4500 tons per day plant incl. QMR² and QMC²

Cemento Progreso, VRM, Vertical Roller Mill, quadropol, QMR², QMC²

When developing and designing the machinery for the cement industry, it is necessary to create a technically viable solution to meet the market requirements. Besides a general feasibility study, and further development as well as optimisation of the design, this calls for an intelligent design approach encompassing. This includes a simple mode of operation as well as economic and desired product aspects.

Today the capital expenditure (CAPEX) for plant operators is generally very high and it is thus only natural that high availabilities need to be achieved. Vertical roller mills are an essential part within the production process for grinding raw material (QMR²), coal (QMK²) and increasingly binding agents or slag (QMC²/QMS²).

vertical roller mill, inspection roller mill, roller unit

At the end the cement quality is important to serve the market. Finally, the raw mill product is the supplier for the kiln, means also responsible for the clinker quality. A technical reliable solution within the production process includes our sepol® high efficiency separator to ensure the desired product fineness for all applications. For raw grinding our new developed HDZX double cyclones are part of the technical solution and includes latest process know-how.

The spotlight has also turned on operating and maintenance costs (OPEX). The energy consumption of a mill, as well as of the entire grinding system or section, plays a significant role in decisions made by plant operators. Maintenance work, which includes inspection, servicing, repairs and improvement, is a cost driver and needs to be taken into account.

Vertical roller mill – digital solutions and services

In the last years, thyssenkrupp has successfully continued stepwise the development process for the quadropol® vertical roller mill concept. This compact and modular conception includes the latest market requirements regarding compact plant layout, efficient operational process, reliable machine design and reduced unscheduled down time. Tailor-made solutions with interchangeable parts are also available. The topic digitalization is being pushed ahead and part of the current design. Digital solutions help to find the optimum operating conditions for your cement plant.

thyssenkrupp Industrial Solutions AG offers additional solutions and services:

polysius® grinding plants – a holistic approach

The development and, in particular, the enhancement of the quadropol® concept incorporates the requirements of the market and is subject to a continuous development process.

Cemento Progreso, Guatemala, 4500 tons per day plant incl. 2 x QMC² 51/25

Cemento Progreso, Guatemala cement plant, quadropol

Why choosing the quadropol® concept?

  • Compact plant arrangement

  • approx. 50 % pre-assembled of mill & separator

  • Lowest down time due to mechanical simplification

  • Less assembly, less alignment, less welding results in reduction in total costs

  • Simple hydraulic system with only one piston accumulator, one roller bearing, no confining air

  • Roller lubrication with one lubrication pump, return flow by gravity

  • Lowest market vibration level < 2 mm/s (measured horizontal at location of comminution)

  • Vertical roller mill gearbox forces only in vertical direction due to arrangement, vibration level < 0.5 mm/s

  • No extensive scaffolding necessary for maintenance work, considering OSH regulation

  • Changing roller tyre within two shifts on pylon

  • Highest mill compound availability and reliability

  • Efficient grinding – low specific power consumption

  • System Monitoring and Advanced Mill Controller implemented

  • Stable operation and process monitoring/control

  • Digitalization incl. AMC and state-of-the-art data analysis

  • etc.

This state-of-the-art equipment enables the staff to monitor and control all process variables in real-time. (...) As shown the plant is able to deliver a stable process and supply a high-quality product.

International Cement Review January 2020

„The making of Oruro“ by Cementos de Bolivia and PEC Consulting Group, USA

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