Loesche GmbH

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Loesche GmbH
Gesellschaft mit beschränkter Haftung
Industry Conglomerate
Founded 1906 (1906) (Berlin)
Founder Curt von Grueber
Ernst Curt Loesche
Headquarters Düsseldorf, Germany
Area served
Key people
Dr. Thomas Loesche
(Managing Partner and Owner in 3rd Generation)
Mr. Rüdiger Zerbe
(Managing Director)
Products Dry Grinding Plants, Container Grinding Plants, Hot Gas Generators, Dynamic Classifiers, Thermal Applications, Automation
Services EPC/Turn Key, Engineering, Consulting and Technical Field Service
Number of employees
850 (2013)
Divisions Cement Industry, Power Industry, Steel Industry, Industrial mineral Industry, Mining Industry
Website www.loesche.com

Loesche is an owner-managed engineering company founded in Berlin in 1906 and currently based in Düsseldorf, Germany that designs, manufactures and services vertical roller mills for grinding of coal, cement raw materials, granulated slag, industrial minerals and ores. At present, more than 400 people are working for Loesche in Germany and around 850 are employed worldwide.[1]

In addition to its new subsidiary in Indonesia, Loesche has operations in Brazil, China, India, Russia, South Africa, Nigeria, Spain, United Arab Emirates, United Kingdom and United States, and it's represented by agents in more than 30 countries.

Company history[edit]

Ernst Curt Loesche - Founder of Loesche GmbH

In 1906, the engineer Curt von Grueber established a company for the design and sale of Kent mills in Berlin. Curt von Grueber Technisches Bureau – the forerunner of Loesche GmbH –was a manufacturer of cement and phosphate mills. In 1912, the company began manufacturing its products in its own manufacturing facility, initially in Berlin-Hohenschönhausen and later in Berlin-Teltow. Its range of products included Maxecon[2] mills, Hauenschild rotary grate kilns, and all kinds of machinery for cement production, including crushers and screw conveyors.

In July 1912 Ernst Curt Loesche joined the company as a young engineer. He soon worked his way up through the ranks to a management position and became a partner in the company in 1919.

Despite the fact that the German cement industry found itself in a deep and sustained crisis after the First World War, Curt von Grueber Technisches Bureau managed to stay afloat by supplying new coal-fired power stations with mills. In 1927, Ernst Curt Loesche[3] developed the Loesche mill for the Klingenberg power station in Berlin-Rummelsburg and in 1937, Ernst Curt Loesche bought Curt von Grueber’s share in the company and became sole owner.

The outbreak of the Second World War was a caesura in the history of Ernst Curt Loesche’s company. As was the case with many other machine manufacturers, the company was obliged to produce armaments for the German war effort: the Reich Air Ministry soon replaced the cement industry as the company’s largest customer. Following a damaging air raid in 1943, production at the Teltow works very nearly ground to a halt. In 1945, at the end of the war, the Soviet occupation forces insisted that the company’s machinery in Teltow be dismantled and transported to the Soviet Union. Only a few months later, the company was back in business working with out-dated machinery. When the Soviet Military Administration expropriated Curt von Grueber Maschinenbauanstalt without paying any form of compensation in April 1948, Ernst Curt Loesche decided to leave Berlin and rebuild his company in one of the three western zones of occupation.

After the expropriation of the Berlin works, Ernst Curt Loesche and some of the employees who had worked for him in Berlin began rebuilding the company, which was now known as Loesche Hartzerkleinerungs- und Zementmaschinen KG, in a ruined building in Düsseldorf in the summer of 1948. When Ernst Curt Loesche died unexpectedly in November of the same year, his son, Ernst Guenter, took over the business. Under his leadership and with its own manufacturing facility in Neuss, Loesche KG re-established itself in the 1950s and after 35 years as managing director of the company, Ernst Guenter Loesche retired in late 1983.

With Dr. Thomas Loesche at the helm, the third generation of the Loesche family is now managing the company. In 1992 the company moved into a new, larger office building on Hansaallee.

The collapse of economies in South-East Asia in 1997 plunged the company into a deep crisis. However, new ideas and the introduction of a series of rationalization measures enabled the company to recover.

On August 1, 2008, Loesche GmbH founded Loesche Automation GmbH. The new company was active in the distribution and further development of the Loesche Industrial Automation product for crushing plants.

On May 2009 the quality certificate was prolonged until 2012 by the internationally renowned certifier Lloyd's Register Quality Assurance (LRQA). Basis of this certification is the revision of ISO 9001:2008 valid since December 2008.

In 2013, Loesche opened two new subsidiaries, one in Jakarta, Indonesia.[4]


Vertical roller mills for cement raw material. With two, three, four and six rollers, these mills were used for the first time in the 1930s to grind cement raw material.[5]

Vertical roller mills for cement clinker and blast furnace slag. Vertical roller mills are traditionally used for processing granulated blastfurnace slag and for grinding composite cements.[6] The first use of one of the company's mills with a grinding-track diameter of just 1.1 m for grinding cement clinker had already been recorded back in 1935.[7]

Vertical roller mills for solid fuels.[8]

Containerised coal grinding plant CGPmobile.[9]

Mobile ore-grinding plant OGPmobile.[10]

Loesche Mill LM 70.4+4 [11] On August 18, 2015, and together with mill manufacturer Loesche, Renk presented the new COPE Drive for Loesche mills in Augsburg.[12]

Other products include: vertical roller mills for ores and minerals, vertical roller mills for industrial minerals,[13] dynamic classifiers. and hot gas generators.[14]

Partnerships and Acquisitions[edit]

In 2012 Loesche GmbH and pyroprocessing specialist A TEC Holding GmbH of Austria have entered into a close cooperation agreement.[15]

In 2013 Loesche acquires the majority of stakes in the aixprocess and aixergee engineering companies based in Aachen, Germany. aixergee GmbH is specialised in the optimisation of production processes in the cement industry in the areas of alternative fuel firing, performance improvement, emissions reduction and stabilisation of plant operation. aixprocess GmbH develops models and tools for the simulation of complex process- and flow-relevant processes from the power plant and process engineering sectors.[16]

Renk AG, Augsburg/Germany and Loesche GmbH, Duesseldorf/Germany agree on exclusivity of the COPE drive concept for vertical roller mills. The COPE gearbox is primarily available for mill outputs between 4000 and 12 000 kW and represents a highly redundant innovative drive system for large and very large vertical mills.[17]


  1. ^ "New Director at Loesche". Coal International. January–February 2013. 
  2. ^ Rowland, Alban J. Lynch, Chester A. (2005). The history of grinding. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration. p. 81. ISBN 9780873352383. 
  3. ^ Rowland, Alban J. Lynch, Chester A. (2005). The history of grinding. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration. p. 83. ISBN 9780873352383. 
  4. ^ "Loesche opens a new subsidiary in Jakarta, Indonesia". World Clean Coal Conference. Global Cement Magazine. Retrieved 11 April 2016. 
  5. ^ Rowland, Alban J. Lynch, Chester A. (2005). The history of grinding. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration. p. 85. ISBN 9780873352383. 
  6. ^ Dipl.-Ing. Th. Fahrland, Dr.-Ing. K.-H. Zysk (February 2013). "Cements ground in the vertical roller mill fulfil the quality requirements of the market". Cement International. pp. 64–69. 
  7. ^ Rowland, Alban J. Lynch, Chester A. (2005). The history of grinding. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration. p. 85. ISBN 9780873352383. 
  8. ^ Blaschke, edited by Wieslaw S. (1996). New trends in coal preparation technologies and equipment : proceedings of the 12th International Coal Preparation Congress, Cracow, Poland, May 23-27, 1994. The Netherlands: Gordon and Breach Publishers. p. 429. ISBN 9782884491396. 
  9. ^ "Grinding in the container". AT Mineral Processing (03/2012). Retrieved 11 April 2016. 
  10. ^ "First Loesche OGPmobile Now in Operation in Southern Asia". Mining-Technology.com. Retrieved 11 April 2016. 
  11. ^ "The largest LOESCHE mill type LM 70.4+4 with Cope Drive is being built". Mining.com. Retrieved 11 April 2016. 
  12. ^ "The new Renk COPE Drive for Loesche mills" (3/2016). ZKG International. Retrieved 11 April 2016. 
  13. ^ "Processing" (PDF). Industrial Minerals. Autumn 2013. 
  14. ^ Google/Patents. "Hot gas generator with burner for dust fuels". 
  15. ^ "Loesche and A TEC enter into close cooperation". Global Cement Magazine. Retrieved 11 April 2016. 
  16. ^ "Loesche acquires majority stake in aixprocess and aixergee, Germany". www.cemnet.com. Retrieved 11 April 2016. 
  17. ^ "Renk and Loesche agree on exclusivity for COPE gearbox" (5/2014). ZKG International. Retrieved 11 April 2016. 

External links[edit]

Additional References[edit]

  • Brundiek, Horst. Die Geschichte der Loesche-Mühle, manuscript.
  • Brundiek, Horst, Kohlenmühlen un mittlere Lesitungen (Problemstellungen und Problemlösungen an Fallbeidpielen), paper given at the conference "Technik im Gespräch" in Düsseldorf, 17 March 1982
  • Brundiek, Horst, "Horst Brundiek - The Father of the 4-Roller-Mill", special edition Zement-Kalk-Gips, 2000
  • Curt von Grueber Maschinenbau Aktiengesellschaft Berlin, Special print-out from the Deutsches Wirtschaftarchiv, date unknown.

Publication commemorating the 75th anniversary of the foundation of the company, Düsseldorf, 1981
Fischer, Wolfram (publisher), Die Geschichte der Stromversorgung, Frankfurt a.M., 1992
Loesche E.G. and Frommelt, G, "Das moderne Schachtofenwerk Semen Kupang auf der Insel Timor /Indonesien", special edition of ZKG, year 37 (1984) no. 12, p. 3-7