When using refractory materials, the following points should be noted:

1) After pouring, if not fully cured, the lining may be damaged before sintering due to its

low early strength and loose structure. The lining may suddenly heat up and sometimes explode.

2) The thickness of the lining is thin, the pouring space is small, and there are many

nails densely distributed between the mold and the burner. When pouring and vibrating,

the operation of the vibrating rod is extremely difficult, and the operation is not proficient

or careful. The refractory pouring material may also not vibrate properly.

3) During construction, the pouring space is small, and construction personnel often

add more water when storing and mixing materials to make the refractory pouring

material have good fluidity. However, it increases the number of air holes in the refractory

lining, reduces the compactness of the lining, and thus reduces its strength (if the refractory

pouring material is chemically bonded, adding too much liquid binder will have the same

adverse effect). Conversely, the lining is not compacted properly during vibration, It will

also shorten the service life of refractory castables.

4) During winter construction, low environmental temperatures can cause the binder

(hydrated) to not hydrate or freeze, which can seriously reduce the strength of refractory

castables or damage their structure, thereby affecting their effectiveness.