High Alumina Castables Pros and Cons

High alumina refractory castables are a kind of refractory material widely used in high temperature industry. Its unique composition and structure give it a series of advantages, but there are also some disadvantages. Fireramo has compiled a list of advantages and disadvantages of high alumina refractory castables to help you better understand high alumina castables.

What is high alumina castable?

High-alumina castable, also known as high-alumina refractory castable, is a common unshaped refractory material. Due to its simple construction and low cost, it is used in many kinds of thermal insulation body. High alumina castable is mainly made of high alumina bauxite aggregate, high alumina cement, silica fume and alumina powder and other materials after a certain proportion, it has excellent high temperature resistance, good erosion resistance and structural stability.

Advantages of high alumina castables

Good fire resistance

High alumina castable mainly consists of high alumina bauxite clinker as aggregate, which has high refractoriness, load softening point and high temperature creep value, and can withstand high temperature and pressure. Under high temperature, it has good structural stability, is not easy to decompose, and can maintain its original performance.

High strength

High-alumina castables have high compressive, flexural and tensile strength at room temperature, and can withstand drastic temperature changes and mechanical impacts, not easy to break, and have a long service life.

Good thermal stability

High-alumina castables have excellent thermal stability, can resist drastic changes in temperature, not easy to crack, flake and other phenomena, and can maintain excellent performance in a wide range of temperatures.

Strong corrosion resistance

High alumina castables can resist the erosion of various chemical substances, for the high temperature oxidizing atmosphere, reducing atmosphere and sulfide atmosphere have good corrosion resistance.

Good economic efficiency

High-alumina castables are easy to construct, which can save the cost of furnace repair, improve the age of the furnace, and do not need to replace the refractory material frequently, thus reducing the maintenance cost.

Disadvantages of high aluminum castables

Strict construction requirements

High-alumina castables need to strictly control the parameters such as the amount of water and baking time, which requires a high level of professionalism for the construction personnel. Meanwhile, the construction period of high alumina castables is relatively long, which requires more time and manpower.

Limited storage time

As high alumina castables are mixed bulk products, composed of many kinds of raw materials, they need to pay attention to moisture-proof, sun-proof, cannot be mixed with other grades of products, and cannot be stored for too long. Normal shelf life is 6 months, it is recommended to use it within 6 months after leaving the factory.

High-alumina castables have become the ideal choice for many high-temperature industrial fields because of its high-temperature stability, corrosion resistance, abrasion resistance and structural stability. It is widely used in furnaces, smelting furnaces, steel-making furnaces and other equipment, providing reliable protection and durability for these equipment.