2017年2月5日星期日

Why do refractory castables with mobility

Castable is a very wide range of refractory material, for its extensive use mainly because of its performance advantages, and significant features, we may be able to understand, it has a certain liquidity, it is because of the What, where Xiaobian to tell why the castable materials with liquidity.


The refractory castable is a kind of granular and powdered material made of refractory material, which is composed of a certain amount of binder and water.It has high fluidity, suitable for construction by pouring method and can be hardened without heating. It is made up of refractory aggregate, powder, binder, admixture, water or other liquid materials.It is usually cast in the field by casting, vibration or tamping, and can also be used as preform.

2017年2月4日星期六

How to extend the service life of medium frequency induction furnace

To extend the life of induction furnace is the only pursuit of each casting, but there are also the significance of the enterprise. The main factors affecting the service life of the intermediate frequency furnace include refractory lining and furnaces in the paving process, the furnace construction process, the baking process and the use process. The following highlights the introduction of two aspects.

Furnace lining lining refractories refractory material quality and performance of the refractory furnace has a vital impact on the life of the furnace. Therefore, they must meet the following requirements.

1. First, the furnace refractory must have good performance. First of all, refractories need to have a relatively high refractoriness to resist heat loads at high temperatures and will not be softened and melted. Second, at the same time, in order to resist the high temperature heat load, they must have high capacity stability. It must therefore be realized that its volume will not shrink, even if inflation is only allowed to exist. Third, they must have relatively high atmospheric temperature strength and high temperature thermal strength and high enough load, for this purpose this force is still in the high temperature of the heat load and heavy load which does not interact with creep and folding. Fourth, it is required to have good thermal shock resistance to resist severe temperature changes and cracks or not appear. In addition, a good slag resistance is also required.

2. Refractory content. Impurities Refractory company products will form refractory compounds with low refractory refractory properties when the temperature is high. The impurity content in the refractory material increases, and the service life of the furnace is shortened. Therefore, it is necessary to ensure that the quartz content and impurity content in the furnace sand must be strictly controlled.

3. Particle size of the refractory fraction. Reasonable particle size fractions make the Hall of Fame postpone high-density coatings very easily during furnace construction in the form. Therefore, the defect is not easy to appear in the course of using. Paving the quality of the furnace furnace life and the importance of safe intermediate frequency electric furnace. First of all, check whether there is damage to the coil paving, heat treatment furnace front. If it does not exist, repair it by painting the damaged portion of the varnish. Stir the refractory clay with water glass, equivalent to the furnace wall, and then clean the furnace wall and floor. Third, has spread the pre-sheared mica plate, alarm stainless steel mesh and asbestos cloth. Fourth, the stainless steel wire mesh with copper core and pierce it from the furnace coil. Next, use three piston rings to tighten the bottom, middle and top asbestos cloths laid on the furnace wall. Finally, cover the furnace after paving to prevent debris fall into it.

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