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Refractory bricks in a torpedo car used for hauling molten iron. In materials science, a refractory (or refractory material) is a material that is resistant to decomposition by heat or chemical attack and that retains its strength and rigidity at high temperatures. [1]
After building of a new refractory-lined industrial furnace or equipment, or refractory maintenance or relining of existing equipment, a necessary step is the start-up of the operation, which usually involves heating-up the unit in a controllable way, in order to prevent spalling or shortening of the materials' predicted lifetime.
Calderys, a subsidiary of Imerys, is a multinational company specialized in producing heat resistant monolithic refractory products. [1] Calderys is headquartered at Issy-Les-Moulineaux on the outskirts of Paris, with over 2,000 employees and 18 plants in more than 30 countries.
A national historic district and historic refractory brick manufacturing complex which is located in Mount Union in Huntingdon County, Pennsylvania, the Harbison-Walker Refractories Company property consists of fourteen contributing buildings and twenty-seven contributing structures, which were built in two sections; the No. 2 works date to ...
A fire brick, firebrick, fireclay brick, or refractory brick is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency .
A merger between SGPR and refractory company L'Eléctro-Réfractaires forms SEPR (Société Européenne des Produits Réfractaires) in 1973. The Provins site was founded in 1925 and was, over the years, a subsidiary of la Société Electro Réfractaires, SEPR, and Lafarge Réfractaires as companies were restructured, bought and sold.
Plasma spraying, developed in the 1970s, uses a high-temperature plasma jet generated by arc discharge with typical temperatures >15,000 K, which makes it possible to spray refractory materials such as oxides, molybdenum, etc. [1]
A typical refractory will be capable of maintaining a temperature drop of 1000 °C (1,800 °F) or more between its hot and cold faces. The shell temperature needs to be maintained below around 350 °C (662 °F) to protect the steel from damage, and continuous infrared scanners are used to give early warning of "hot-spots" indicative of ...