Refractories
UNG group was founded in 2003, we specialized in the manufacturing of recarburizer for Steel industry, and investmenting the plants of calcined bauixte, Calcium aluminate and Ceramic sand. It characterized by its continual effort to update and improve its products range, and by the search for solutions to the problems and demands posed by its customers.OUR PRODUCT Carbon&Graphite Recarburizer, Calcium Alumin, Calcium Aluminate (Fused, Sintered), Calcined Bauxite, Mullite (Sintered, Fused), Ferro Alloys, Inoculant, Nodulizer, Black Silicon Carbide, Steel Shot.
Why Choose Us
Production Market
We have built a stable clientele worldwide, USA, Mexico, Spain, Germany, Italy, Poland, Middle East, Egypt, India, Southeast Asia.etc.
Our History
UNG group was founded in 2003 ,we specialized in the manufacturing of recarburizer for Steel industry, and investmenting the plants of calcined bauixte ,Calcium aluminate and Ceramic sand.
Our Service
Contact customers to understand their needs and make quotations. Confirm the order, and produce, pack and ship in time.
Our After-sales
Taking the initiative to take responsibility, the group constantly strives to update and improve the product range and seek solutions to solve the problems and needs raised by customers.
Silica Refractory
Silica brick is one of the most important refractory materials having around 93% SiO2. Top refractory cement suppliers in India make use of high-quality rocks as a raw material to manufacture them.
Fireclay Refractory
The hydrated aluminum silicates that have around 25% -45% Al2O3 and 50% -80% SiO2 are known as fireclay refractories. These refractory materials have only minor additional minerals.
Magnesite Refractory
Magnesite refractories are considered to be chemically fundamental materials having around 85% magnesium oxide. Made of magnesite (MgCO3) and silica, these refractories often feature weaker attributes and their main value lies in their resistance to the basic slags that mainly include lime and iron-rich ones.
High Alumina Refractories
The alumina refractories that have more than 45 percent alumina are known as high alumina refractories.
Zirconia Refractories
Zirconia refractories come with an outstanding hardness at room temperature, and across the applications, this hardness can be maintained up to 15000 degrees Celsius temperature range.
Monolithic Refractory
Monolithic refractories are materials that are put into use as a suspension and finally hardened to create a solid mass. Monolithic is the most common term used for all types of unshaped refractories. Monolithic refractories are fast replacing the conventional type of fir.
Typical Parameters of Refractories
|
Description |
GRADE 23 BRICK |
GRADE 26 BRICK |
GRADE 28 BRICK |
GRADE 30 BRICK |
|
Classification Temperature (℃ ) |
1300 |
1400 |
1500 |
1550 |
|
Chemical Composition (%) |
||||
|
Al2O3 |
40 |
56 |
67 |
73 |
|
SiO2 |
51 |
41 |
30 |
24 |
|
Fe2O3 |
≤1.0 |
≤0.8 |
≤0.7 |
≤0.6 |
|
Density (kg/m³) |
600 |
800 |
900 |
1000 |
|
Modulus of Rupture (MPa) |
0.9 |
1.5 |
1.8 |
2.0 |
|
Cold Crushing Strength (MPa) |
1.2 |
2.4 |
2.6 |
3.0 |
|
Permanent Linear Change (%) |
1230℃ x 24h ≤0.3 |
1400℃ x 24h ≤0.6 |
1510℃ x 24h ≤0.7 |
1620℃ x 24h ≤0.9 |
|
Thermal Conductivity (W/m·K) |
||||
|
200℃ |
0.15 |
0.23 |
0.27 |
0.28 |
|
350℃ |
0.18 |
0.24 |
0.30 |
0.35 |
|
400℃ |
0.19 |
0.25 |
0.33 |
0.38 |
|
600℃ |
0.23 |
0.27 |
0.38 |
0.40 |
Steel Industry
Widely used in the steelmaking process to line furnaces, ladles and tundishes, refractories are exposed to the harsh conditions of molten metal and slag. In steelmaking, they are typically consumed and replaced on a regular basis due to the extreme nature of the steel production environment.
Ceramics Industry
For the ceramics industry, refractories are present in the manufacturing of both traditional ceramics, such as bricks and tiles, and advanced ceramics used in high-tech applications. These refractories line the kilns and furnaces where raw materials are fired at high temperatures to form ceramic products.
Cement Industry
With heavy reliance on refractories, especially in the kiln where limestone and other materials are heated to produce clinker, the refractory linings formulated for cement kilns must withstand the required high temperatures in addition to the mechanical abrasion and chemical attack from alkalis and acids.
Glass Manufacturing
In glass manufacturing, refractories are used to construct and line the furnaces and tanks in which glass mixtures are melted. Key requirements for refractories in this sector include resistance to high temperatures and the ability to prevent glass contamination.
Challenges and Innovations
Despite their strength, refractory materials face many challenges that can affect their performance. To address these issues, significant research and development is continually invested in improving the properties of refractory materials.
Specification
|
Items |
RSGLJ-1 |
RSGLJ-2 |
|
|
Al2O3 % |
65 |
75 |
|
|
Refractoriness ℃ |
1750 |
1770 |
|
|
Linear Dimensional Change % |
-0.02 |
-0.4 |
|
|
Cold Crushing Strength MPa ≥ |
110℃×24h |
50 |
60 |
|
1100℃×4h |
60 |
70 |
|
|
Breaking Strength MPa ≥ |
110℃×24h |
9 |
11 |
|
1100℃×4h |
10 |
12 |
|
|
Maximum Service Temperature ℃ |
1200 |
1400 |
|
Selling Units:Single item Single volume: 1 cm3 Single gross weight:4.25 KG Package Type:Standard Export Packing
