Maintenance and demoulding of unshaped refractory castables

September 20, 2018

Maintenance and demoulding of unshaped refractory castables

Refractory castables (also known as refractory concrete) vary widely in their aggregate materials, binders and admixtures. List of several kinds of refractory castables commonly used today - Portland cement refractory castable, high alumina cement refractory castable, water glass refractory castable, phosphoric acid (or phosphate) refractory castable and clay refractory castable as follows.

Refractory castable maintenance system

 

Item

Variety

Maintenance environment

Suitable curing temperature / °C

Maintenance time / d

1

 Portland cement refractory castable

Humid maintenance  

Winter steam curing

15--25  

60--80

>7

   0.5--1

2

High alumina cement refractory castable

Humid maintenance

15--25

>3

3

Water glass refractory castable

Dry environment maintenance

15--30

7--14

4

Phosphate refractory castable

Dry environment maintenance

20--25

3--7

5

Clay refractory castable

Dry environment maintenance

15--35

>3

 

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