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Similarly to the Portland concrete used in civil engineering, water is added to the refractory castables to provide workability and allow molding, pumping, shotcreting or other forms of placement. Water exists within castables in free or combined forms: while free water remains in the pores without reaction with the materials' other ...
In the first quarter of 2014, Calderys acquired Termorak Group in Finland, a company that specialises in refractory services including lining design, installation work and inspections. This acquisition enables Calderys to strengthen its position in the petrochemical and pulp and paper industries, as well as in the power business in Finland ...
Refractory materials are classified into three types based on fusion temperature (melting point). Normal refractories have a fusion temperature of 1580–1780 °C (e.g. fire clay) High refractories have a fusion temperature of 1780–2000 °C (e.g. chromite) Super refractories have a fusion temperature of > 2000 °C (e.g. zirconia)
So, CAC cement must not be confused with calcium sulfo-aluminate (CSA) cement containing calcium sulfate and invented later in 1936. [ 6 ] The main constituent, and also the most reactive phase, of calcium aluminate cements is the monocalcium aluminate ( CaAl 2 O 4 = CaO · Al 2 O 3 , also written as CA in the cement chemist notation ).
The purpose of the refractory lining is to insulate the steel shell from the high temperatures inside the kiln, and to protect it from the corrosive properties of the process material. It may consist of refractory bricks or cast refractory concrete, or may be absent in zones of the kiln that are below approximately 250 °C (482 °F).
Refractory/Insulation gunning and castable mixes [ edit ] Exfoliated vermiculite can be combined with high alumina (also known as calcium aluminate ) cements and other aggregates such as expanded shale , clay , and slate or sodium silicate to produce refractory/insulation concretes and mortars.
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most ...
In the making of firebrick, fire clay is fired in the kiln until it is partly vitrified.For special purposes, the brick may also be glazed. There are two standard sizes of fire brick: 9 in × 4 + 1 ⁄ 2 in × 3 in (229 mm × 114 mm × 76 mm) and 9 in × 4 + 1 ⁄ 2 in × 2 + 1 ⁄ 2 in (229 mm × 114 mm × 64 mm). [2]
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