Refractory cement is very easy to use, after adding water coordination can be strong, usually do not need to add the rest of the binding agent, can be used for cementing all kinds of refractory aggregates such as corundum, calcined high alumina bauxite, molybdenite, gangue, expanded perlite, etc., mixed with the refractory mortar or concrete.
If only refractory cement is used, a lot of cracks will occur after high temperature.
Refractory cement is different from refractory soil, do not mix refractory soil and refractory cement all the way to the refractory construction, just as the soil involved in the cement, so negative, solidification does not have the strength.
The newly constructed refractory cement should be baked after 72 hours. Under the premise of poor ventilation, moisture can not be easily removed, the heat preservation time should be moderately extended. Room temperature of 350 degrees stage, should be baked slowly, otherwise it will lead to sheet cracking. If there is still a review of steam after 350 degrees heat preservation, in order to prevent the emergence of sudden, should slow down the rate of heating.
When baking with wood, direct contact with the flame is often formed at the surface of too rapid heating, should be defended. When baking with heavy oil, be careful not to spray heavy oil on the surface of the lining to prevent sheet burst. The cooling of the refractory cement lining should also be slow, to prevent forced ventilation.
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