Hot Blast Stove High Alumina Brick

A compact super high-alumina brick with high compressive strength and high density.The firing temperature of this high-alumina brick is similar to that of ordinary high-alumina bricks, with low energy consumption and low cost.The service life on the kiln is twice that of ordinary high-alumina refractory bricks.

product details

It is based on the special grade bauxite clinker calcined in the rotary kiln as the aggregate (grain size 1smm-3smm), weight ratio: 40%~45%, plus bauxite clinker powder and fine powder: 45% to 51%, soft Clay: 7% to 10%, a small amount of kyanite powder: 3 to 5%, and adhesive pulp waste liquid 4% to 5% and other components. When making, bauxite clinker needs to be crushed and sieved, and the powders are mixed and ground together. After batching, mixing, molding, and drying, they are fired into refractory bricks at 1440~1460°C. High-alumina bricks are high-alumina refractory bricks with an aluminum oxide content of 55% or more. Because the refractory temperature is greater than 1790 degrees Celsius, it is a refractory material. It is a common material for the lining of high-temperature furnaces. It is made of special grade high alumina bauxite clinker as the main raw material, soft clay, and waste pulp and paper liquid as the binding agent to form mud, which is formed by high-pressure forming, drying, and high-temperature firing. It is a sintered refractory brick.

Product Features:

Four advantages of Zhiyao high alumina bricks:
1.High-temperature resistance, good thermal stability, widely used in major high-temperature kilns
2. High purity of raw materials and high aluminum content
3. Small thermal conductivity, thermal insulation, energy-saving, and environmental protection
4. The size is accurate to meet the customized needs of customers
High alumina bricks are divided into 4 grades according to the content of aluminum oxide Al₂O₃: Grade I—Al₂O₃3 content>75%; Grade II—Al₂O₃ content 60-75%; Grade III—Al₂O₃ content 48-60%; super high aluminum Brick Al₂O₃ content is 80%; high alumina brick with alumina content above 48% is a neutral refractory material. It is formed by forming and calcining alumina or other raw materials with high alumina content. High thermal stability, refractoriness above 1770℃. It has good slag resistance and is used for the lining of steel-making electric furnaces, glass melting furnaces, cement rotary kilns, etc. This product has the advantages of small high-temperature creep, strong corrosion-resistance, and good thermal shock stability. It is suitable for large and medium-sized hot blast stoves. The production process of high alumina bricks and multi-clinker clay bricks are similar. The difference is that the proportion of clinker in the ingredients is higher, which can be as high as 90-95%. The clinker needs to be sorted and sieved to remove iron before crushing, and the firing temperature Higher, such as Ⅰ, Ⅱ high alumina bricks are generally 1500~1600℃ when they are fired in a tunnel kiln.

Product Parameters:

Shaped high alumina brick


RL-65 RL-55
AL²O³ ≥65 ≥55
Refractoriness ℃ ≥1790 ≥1770
Starting temperature of load softening ℃ (0.2MPa) ≥1500 ≥1470
Reburning line changes(1500℃*2h)% +0.1,-0.4
Apparent porosity ≤24
Compressive strength at room temperature ≥49.0 ≥44.1

Application Range And After-Sales Service (Application And After-Sales Service):

Application background:
1) Tracking of kilns in cement and other building materials industries;
2) Furnace lining stories in petrochemical, metallurgy, ceramics, and glass industries;
3) Back insulation of heat treatment furnace;
4) The non-ferrous metal industry deviates from insulation;
5) High-temperature reaction, heating equipment back blood.

Service Content:

1. Respond promptly
Respond to your inquiries in a timely manner, select multiple recommendations according to your needs, quickly reply to emails and provide solutions.
2. Sample evaluation
The quality evaluation can accept the price of fire brick samples and trial orders.
3. Strict quality control
Arrange production more often and strictly control quality.
4. Shorter delivery time.
Book a ship or plane to guarantee delivery time.
5. Professional services
Provide all detailed news and pictures from the order to the delivery; if necessary, provide relevant documents and original certificates; considerate after-sales service.
Pre-sales, during sales, and after-sales services can be enjoyed by dedicated personnel. The above indicators can be referred to. If you have any questions, please contact us and sincerely wait for cooperation!

Regarding What You Want To Ask:

1.Are you a manufacturer or a trading company?
We are a real manufacturer, we can not only provide high-quality products at the most favorable price but also provide the best pre-sales and after-sales services.
2.What kind of products can you provide?
Our company can provide kiln products,such as refractory bricks,refractory castables,and refractory materials.
3.Can your company provide samples or can we visit your factory? Of course,samples are available, and you are welcome to visit our factory at any time.
4.Why did we choose your company’s products?
This is a good question.We are in Yangquan City, Shanxi Province, China, one of the largest refractory bases in the country, so the price and quality of the products can be guaranteed.


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