Micro-expansion High Alumina Brick, using high-quality high-alumina bauxite and mullite synthetic materials as the main raw materials, adding kyanite, andalusite, sillimanite and pyrophyllite as expansion agents, using soft clay as a binder, and then Adding an appropriate amount of additives and baking at a suitable temperature to produce a high-alumina brick product. It has been successfully applied to refractory lining in ladle that smelt low-carbon steel, stainless steel and other ladle.

In addition, the Micro-expansion High Alumina Bricks are slightly expanded when used in a high-temperature zone, so that the ladle lining has good integrity, thereby improving corrosion resistance.

Preparation Process of Micro-expansion High Alumina Brick

The Micro-expansion High Alumina Brick is mainly made of high-alumina bauxite and added “three stone” concentrate, which is made according to the production process of high alumina brick. In order to make the high-alumina bricks expand in moderation during use, the most important thing is to select the “Three Stones” concentrate and its particle size, control the temperature of the firing, and make the selected “Three Stones” minerals partially molybdenized. Residual part of the three stone minerals. The residual “three stone” minerals will be further mineralized during the use (one or two times of mineralization), at this time, accompanied by volume expansion.

The selected “Three Stones” minerals are preferably composite materials. Due to the different decomposition temperatures of the “Three Stones” minerals, the expansion of the Mulhouse petrochemicals also varies. With this feature, the high alumina brick has a corresponding expansion effect due to different working temperatures, and the brick joint is extruded to improve the overall compactness of the lining, thereby improving the slag resistance of the brick.

Why of Micro-expansion High Alumina Brick

During the use of high-aluminum bricks, due to poor volume stability and large brick shrinkage, molten steel erosion is expanded. The ladle is intermittently operated and subjected to cooling – repeated thermal cycling of high temperature, which is poor in thermal shock resistance and causes spalling. The Micro-expansion High Alumina Brick produced by RS Kiln Refractory Bricks Company has good thermal shock resistance, micro-expansion during the use process, and extrusion of the brick joint, so that the entire ladle lining has a very good integrity, thereby improving the slag corrosion resistance.

Physical and Chemical Indicators of Micro-expansion High Alumina Brick

Application of Micro-expansion High Alumina Brick

The micro-expansion high alumina bricks produced by RS Company are mainly used for the working layer, permanent layer and electric furnace top of ladle and mixed iron vehicles, and the effect is better. The use of partially expanded high alumina bricks in cement kilns is also gradually expanding.

Micro-expansion High Alumina Brick Manufacturer

Rongsheng refractory brick manufacturer produces high-quality micro-expansion high alumina bricks with high load-softening point, anti-flaking, erosion resistance, quenching and rapid heat resistance, erosion resistance and pollution-free performance, which are highly praised by customers. The high alumina brick product has micro-expansion property, so that the ladle lining has good integrity, thereby improving corrosion resistance, Service longer time. The composite additive creates a complex phase toughening mechanism due to the difference in its expansion coefficient, also imparting good thermal shock resistance stability to the product. If you need to purchase micro-expansion high alumina brick products, please contact us and we will get back to you as soon as possible. Or Mailto US.