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Lafarge invents and patents aluminous cement with refractory qualities, the precursor to monolithic refractories (1908).

In the United States, William A.L. Schaefer develops the first monolithic refractory and creates the Pliable Firebrick Company, also known as Plibrico (1914).

Stollberg is created in Mülheim, Germany, for the production of casting auxiliary materials (1926).

Silver & Baryte Ores Mining Co. S.A. (S&B), an industrial minerals company, is founded on Milos Island, Greece (1934)

Lafarge creates SECAR (Société d’Etude et de Conseil pour Appareillage Réfractaire – Refractory equipment studies and consultancy), a refractories marketing subsidiary (1938).

Plibrico is registered in London (1931) and begins its European expansion: opening its first branch in Sweden (1937), launching operations in the Netherlands (1952), establishing its first European production site in Neuwied, Germany (1955), and entering the Austrian market (1958).

Lafarge continues its expansion on the refractories market, acquiring interests in two of its competitors, Prost and Schlumberger (1970). Ten years later, “Lafarge Réfractaires” is officially created in France (1980). Global expansion begins in 1990, with the launch in Taiwan of its first Asian production facility (1990-1992) and the acquisition of Svenska Höganas AB, opening up business in both Scandinavia and Japan (1997).

Plibrico joins the Imerys Group (1996) and acquires the Valle family’s refractories production plant in South Africa (1998).

Stollberg establishes itself as a worldwide mold flux manufacturing company in the USA (1984) and Korea (1986), followed by France, India and Brazil (1999).

S&B expands in the US (1964) and in China (1998).

Lafarge Refractories enters the Australian market with the acquisition of Hanlon Refractory (2001). Imerys acquires Lafarge Refractories (2004)

Plibrico International & Lafarge Refractories merge under the Imerys group to form the refractories leader Calderys (2005).

Calderys acquires ACE Refractories, India’s leading monolithic refractory manufacturer (2007). One year later, the company opens its first Chinese plant, in Zhangjiagang, and strengthens its presence in Europe with the acquisition of Svenska Silikaverken AB, a monolithic company operating in Sweden, Norway, and Finland (2008)

S&B acquires Stollberg, to become a global mine-to-market business (2004).

Calderys pursues its Asian expansion, forming a joint venture with PT Indoporlen in Indonesia and acquiring Tokai Ceramics in Japan (2013). In Europe, the Group acquires the Finnish company Termorak, to broaden its service offering for projects in the petrochemical and power industries (2014). To further strengthen its presence in the Nordic market, it opens its first office in Norway and acquires Fagersta Eldfasta AB, a refractory installation company based in Sweden (2016), followed bytwo refractory design, installation and engineering services companies – N.G. Johnson Northern in the UK and SetLinings in Germany (2017). Calderys also expands its operations in America with the acquisition of SPAR Inc., a monolithic refractory manufacturer based in Alabama, US (2016) and the start-up of operations in Brazil (2018).

Imerys acquires S&B’s main activities, including Stollberg (2015). S&B’s activities are renamed Imerys Metalcasting. Stollberg’s activities become Imerys Steel Casting Fluxes.

Calderys, Imerys Metalcasting and Imerys Steel Casting Fluxes are merged  into Imerys’s High-Temperature Solutions (HTS) Business Area, offering a wide range of refractory products, and advanced solutions to enhance steel casting, metallurgical fluxes and molding processes (2018). The decision is made to rename HTS Calderys.

Three important acquisitions boost  Calderys’s operations in high-growth regions (2020): 

- Hysil, the leading Indian producer of calcium silicate boards used for thermal insulation. 

- A majority stake of 60% in Haznedar Durer Refractories, a Turkish manufacturer  of high-grade monolithic refractories and refractory bricks. 

- Sunward Refractories, a Taiwanese producer of monolithics, bricks and tap hole clays. 

In 2023, Calderys becomes a privately owned company combined with HarbisonWalker International. Together they form a leading world-class refractories solutions provider.  

Calderys is the fruit of over 100 years of field experience and innovation in high temperature operations. Successive mergers of industry champions such as Plibrico, Lafarge, Stollberg and S&B, as well as other acquisitions have turned Calderys  into the leader it is today. Over the years, our expertise has earned us a global reputation for our tailor-made solutions.