In the production of magnesia-aluminum refractory castable preforms containing crystalline silicon powder, the molding surface often rises, resulting in product delamination, which seriously affects the service life and output of refractory products.

There are two types of silicon powder: one is high-purity silicon powder, and the other is a by-product of the production of metallic silicon or ferrosilicon. But it needs to have non-messy physical and chemical functions, otherwise it will affect the use of the product. The latter is usually called a refractory. It is hollow, active, non-circular, and well-filled. It reacts with pozzolan at room temperature and reacts with al2o3 derived mullite at high temperature. All of these help To improve the strength of the castable.

In the production process of refractory preforms, due to the mass substitution of silicon powder in the raw materials, water immersion often occurs, which causes fluctuations in the molding performance of the product. In order to solve this problem, firstly screen the silicon powder to make its composition uniform, and then increase the amount of retarder, increase the amount of water, extend the wet mixing time during the mixing process, and then form a mixture, appropriately reduce the product maintenance temperature, from This problem is fundamentally solved. Among them, the remarkable performance is the rise from the level after the product is formed.

The above is a small series, to give you a brief introduction on how to solve the problem of crystalline silicon powder lamination, you can briefly understand. The content is for your reference only, please contact us for any inquiry!