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Construction instructions for corundum castables

Words:[Big][Medium][Small] Mobile Page Two-Dimensional Code 2018-10-15     

1. All necessary preparations must be completed before construction, such as equipment cleaning, construction personnel training, tools, water quality, material samples, etc.

 

2. The ambient temperature of the lining material construction should be 5~30°C, lower or higher than the temperature range, and the corresponding heat preservation and cooling measures should be taken.

(1) If the ambient temperature is lower than 5 °C, the dry material should be stored in the heating room. During the construction, it can be stirred by heating the shell and heating water (below 40 °C), and the amount of coagulant is added under the guidance of relevant technical personnel. And other methods to keep the temperature of the mixture above 10 ° C;

(2) If the ambient temperature is above 30 °C, the cooling measures should be taken to ensure the construction time. The specific measures are as follows: a. Conceal the container and the pipeline from sunlight. b Spray water on the outer wall of the lining equipment to cool down, but must ensure that water does not flow into the construction site inside the lining equipment. c Under the guidance of relevant technical personnel, an appropriate amount of admixture (retarder) is added. d Stir with ice water. e Use a cooling fan to cool the environment.


3. The lining material is packed in inner film bag outer woven bag, which contains aggregate, cement (A+B) and additives (all have been weighed and can be used directly), wherein cement (A+B) and additives are metered separately. After that, it is packed in plastic bags alone. During the construction, firstly, the aggregate and cement and additives are placed in a clean forced mixer for dry mixing for 2 to 3 minutes, then cleaned with tap water (pH of water is about 7), and the amount of water is about the total weight of the material. 4.8~6%, fully stirred for 3~5 minutes, after having good construction plasticity, can be applied. If the temperature is high and harden fast, it is also equipped with retarder. When used, 4 bags of aggregate and 1 pack of retarding are used. The agent can be added, and the addition is specifically adjusted according to the hardening time of the material. The preparation of the sample is detailed in Article 7.


4. Stirred materials should be used up within 20 minutes. If there is initial condensation, do not mash and add water, otherwise it will affect the performance of the material. 5. The material can be constructed by mechanical vibration or manual beating. No matter which construction method is used, it should be compacted and the surface should be smooth.



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