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(1) in order to pursue the construction speed, arbitrarily increase the amount of water refractory castable, mixed castable can be like water, with several meters or even more than ten meters long rubber hose into the mold;
(2) the mold set is too high, this practice is to improve the construction speed, but will inevitably lead to pouring water too much and vibration compaction results;
(3) do not set the mold, hand coating pouring material, this situation is generally used at the bottom of the pipe lining construction, sometimes even in part of the preheater cone lining construction;
(4) die strength, resulting in deformation of the lining, or lead to pouring water increase, affect the quality of materials;
(5) in winter construction, add salt or other substances as antifreeze, reduce the high temperature performance of the material, or in winter construction do not take reasonable anti-freeze measures;
6 short maintenance time;
7, too fast baking, pouring material burst;
Today, other, such as anchoring parts of the material, shape, size, welding quality, quantity, anti-expansion treatment, water cleanliness, expansion joints left set unreasonable aspects.
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