Common classification of lightweight castable

Words：[Big][Medium][Small] Mobile Page Two-Dimensional Code

2018-10-15

Sharing

Lightweight castable is made of aluminate cement, high alumina fine material, ceramsite, plus some additives.Low heat insulation, heat preservation, water absorption rate features, simple construction, is the most ideal construction of alkali resistant parts under high temperature.Good workability, adhesive power is strong, the initial setting time and construction operation time is long, fast growth strength, permeability resistance is strong, do not need to acidification treatment, easy to ensure the masonry mortar joint dense full, can significantly increase the tightness of chimney lining wall, integrity and lined with corrosion resistant ability, high chimney, and the high temperature flue duct lining ideal cementing materials, also can be used in petroleum, chemical industry, non-ferrous metallurgical industry such as acid pool, slot acid engineering, etc.Acid-proof brick, acid-proof cement and matting fabrics are refractory materials developed by our factory, which are suitable for heat preservation of power station boiler chimney and heat network piping.

Mainly according to porosity, binder, aggregate varieties classification.In practical use, it is often classified by temperature or function.

According to the porosity of dense castable and porosity of not less than 45% heat insulation and injection of two kinds.

According to the binding agent is divided into hydraulic binding, chemical binding, coagulation binding castable.

Hydraulic binding castables set and harden at room temperature and harden through hydration, the main varieties are Portland cement, ordinary calcium aluminate cement, pure calcium aluminate cement, electric melting pure calcium aluminate cement castables, etc.Chemically bonded castable is generally hardened by adding hardening agent at room temperature, and the main varieties are sodium silicate, aluminum sulfate, phosphate castable, etc.Agglomerating and binding castable is hardened by sintering in the process of calcination.

According to the refractory aggregate score high aluminum clay aggregate, aggregate, siliceous aggregate, alkaline aggregate (magnesite, dolomite, etc.), special aggregate (with carbon, nitride, carbide and spinel, zircon, etc.) and heat insulation aggregate, perlite, vermiculite, ceramsite, drift beads, sand light brick, porous materials, alumina hollow ball, etc.).

Classification of lightweight castable

Ⅰ: half of lightweight refractory castable, volume density of 1.0 ~ 1.8 g/cm3

Ⅱ: lightweight refractory castable, volume density of 0.4 ~ 1.0 g/cm3

Ⅲ: super lightweight refractory castable, volume density is less than 0.4 g/cm3

Classification by service temperature

Ⅰ: low temperature heat insulation (light) refractory castable, using temperature is 600-900 ℃

Ⅱ: medium temperature insulation (light) refractory castable, using temperature is 900-1200 ℃

Ⅲ: high temperature insulation (light) refractory castable, using a temperature of 1200 ℃ >