How should refractory cement be used?

Refractory cement is also called aluminate cement. Aluminate cement is a hydraulic cementing material made from bauxite and limestone by calcining calcium aluminate as the main component and alumina content of about 50%. Aluminate cement is usually yellow or brown, but also gray. The main mineral of aluminate cement becomes a calcium aluminate (CaO, Al2O3, Ca, and other aluminates, as well as small amounts of dicalcium silicate (2CaO, SiO2), etc.

Refractory cement is very simple to use, add water to reconcile can be hardened, generally do not need to add other binder, can add some refractory aggregate and powder. If you simply use refractory cement, high temperature will produce a lot of cracks. It can be used for cementing all kinds of refractory aggregate (such as corundum, calcined high alumina, etc.) to make refractory mortar or concrete, which can be used for lining of cement rotary kiln and other industrial kiln.

Notes for refractory cement

And fireclay refractory cement is a kind of refractory, refractory cement in 1500 degrees refractoriness, he after solidification high intensity, label can reach 625, the main and bauxite aggregate mixture of refractory concrete with high refractoriness, and fireclay refractory at 1000 degrees, no strength after solidification, adhere to only play a, Refractory is usually used for laying refractory bricks or for pasting furnace walls.

If the refractory cement and refractory soil is used, the use value of refractory cement will greatly discount, it’s equal to the refractory cement and loess mixed together, refractory cement solidification strength and label will reduce a lot, finish and after drying furnace refractory material, with the hand a clasp, material will fall off. Without strength, how can such construction take a long time? Suggest that those who are engaged in furnace construction for a long time, in the construction of refractory materials, refractory cement and refractory soil carefully mixed use.

Classification of cement

Cement according to use and performance is divided into:

(1) General cement: cement usually used in general civil and construction projects. General cement mainly refers to: GB175-2007 provisions of the six kinds of cement, that is, Portland cement, ordinary Portland cement, slag Portland cement, volcanic limestone Portland cement, fly ash Portland cement and composite Portland cement.

(2) special cement: cement for special purposes. Such as: G - class oil well cement, road Portland cement.

(3) characteristic cement: a kind of cement with more outstanding performance. Such as: fast hardening Portland cement, low heat slag Portland cement, expanded sulphoaluminate cement, phosphor aluminate cement and phosphate cement.