CT 28 High Temperature Alumina Silicate Thermal Insulation Refractory Fire Brick

The company is committed to the production and development of all types of medium and high-end perlite refractory plate, ferro alloy electric arc furnace, Calcium Silicate Board. Employees are our most precious resource. We promote the learning and personal development of our employees, while ensuring that they all feel at home. The team works together, exerts individual talents and inspires each other to achieve excellence. With the persistence and perseverance of our employees and the care and support of our customers, our company has established an enterprise integrating Eastern and Western cultures and modern enterprise management concepts based on the simple belief of 'honest business and honest life'.

1.Bubble Alumina Brick Description

Bubble Alumina Brick is a kind of energy-saving heat insulation material of ultra-high temperature material. It is made of alumina hollow ball and alumina powder as the main raw materials, combined with other binders, and fired at a high temperature of 1750 degrees.

Item	Bubble alumina brick			Bubble zirconia brick
	85	90	99	98
Max service temperature	1680°C	1700°C	1800°C	2200°C
Al2O3/%	≥85	≥90	≥99	-
ZrO2/%	-	-	-	≥98
SiO2 /%	≤13	≤8	≤0.2	≤0.2
Fe2O3/%	≤0.2	≤0.2	≤0.2	≤0.2
Bulk density/g.cm3	1.4-1.7	1.4-1.7	1.4-1.7	≤3.0
Cold crushing strength/Mpa	≥12	≥10	≥9	≥8
Refractoriness under load (0.1MPa,0.6%)	≥1650°C	≥1700°C	≥1700°C	≥1700°C
Reheating Linear Change % (1600 °C,3h) ≤	±0.3	±0.3	±0.3	±0.3
Thermal expansion coefficient (Room temp-1300°C)	~7.8	~8.0	~8.6	~9.0
Thermal conductivity w/(m.k)(Average 800°C)	≤0.8	≤1.3	≤1.5	≤0.3

2. Bubble Alumina Brick Feature

1. The temperature can reach above 1750 degrees, and the thermal stability is good.

2. The reheating line has a small change rate and can be used for longer.

3. It has obvious thermal insulation properties and low thermal conductivity

4. Reduce heat dissipation and improve thermal efficiency

3.Bubble Alumina Brick Application

High alumina bubble bricks are suitable for cracking furnaces, hot blast furnaces, heating furnaces, tunnel kilns, crucible furnaces, electric furnaces, and electric furnace linings.

We are committed to the all-round development of the industry, focusing on the application development and services of our CT 28 High Temperature Alumina Silicate Thermal Insulation Refractory Fire Brick, and have initially formed independent intellectual property rights. We continue to improve corporate management capabilities, technical research levels, economic benefits, and establish a good corporate image. After years of pragmatic work, we have established a good company brand image in related fields.

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