Precautions for Construction of Low-Cement Castables

During the construction process, low cement castables must be constructed according to the requirements of the construction drawings. According to the technical requirements of the drawings, the furnace steel structure, baselines, holes, and other parts should be comprehensively and carefully inspected and accepted. Check the side wall insulation layer bricks and anchor bricks. The shape and size of the anchor bricks and hanging bricks should be inspected and accepted piece by piece. There should be no transverse cracks. The position of the bricks should meet the design requirements and keep the anchor hooks with the furnace shell. Or the furnace ceiling hanging beams are vertical. To prevent the side wall lightweight insulation bricks from absorbing water, a layer of asphalt should be painted on their surface. It is necessary to check whether the inner mold is firmly supported and cannot be moved. The surface should be wrapped with cloth; the template should also be firmly supported and the surface should be brushed with oil to facilitate demoulding. Check whether the mixer, vibrator, etc. are working normally; and whether the driving is normal. If a failure occurs, repair it in time or prepare other hanging equipment. You must ensure that pouring cannot be interrupted. It is necessary to clean up the debris in the pouring area and make sure it is neat and clean.

1. Proportion requirements for low cement castables

When using low-cement castables, attention should be paid to the mixing method. The proportions must follow the corresponding regulations. Do not add water arbitrarily or add castables blindly. Once the proportion is wrong, the pouring effect will be greatly reduced. The added water must be pure drinking water and must not contain impurities. Therefore, castable operators must have rich experience and be able to complete the deployment of castables in reasonable proportions to ensure smooth follow-up work.

2. Construction methods of low cement castables

In the actual application process of low-cement castables, many customers mix the castables evenly and leave them to dry without using them in time. The disadvantage of this is that the low-cement castable exposed to the air will evaporate more water, which in turn reduces the moisture content of the castable, which is not conducive to the use of the castable. If the purchased low-cement castables are large in quantity, they need to be stored in a relatively dry environment in time, and corresponding protection work must be put in place to ensure that the castables are not affected by external air and avoid quality damage. It is necessary to take an appropriate amount before use and do not put all the castables on the construction site. This behavior will interfere with the preservation of the castables.

3. Oven curve of low cement castable

The outstanding feature of low-cement castables is that they are dense and high-strength, which brings benefits to use. However, if baked improperly, it will easily peel or explode. Therefore, it is very important to formulate a reasonable oven curve. If necessary, excellent explosion-proof additives can be used, so that the moisture of low cement castable molding weight can be removed smoothly without causing any side effects.

The above are the precautions for the construction of low cement castables. During the construction process, construction must be carried out in strict accordance with the early construction plan. At the same time, reasonable changes must be made according to the construction environment. Pay attention to construction safety during the construction process. The oven process must be strict to the oven requirements. This way, the furnace can be in good working condition during subsequent use of the furnace, and the service life of the furnace will also be increased.