Magnesia Spinel Refractory Bricks

Magnesia Spinel Refractory Bricks can be simply called spinel refractory bricks, which is an alkali refractory. Spinel refractory bricks are featured with spalling resistance, high temperature creep resistance, high refractoriness under load, slag resistance, and good thermal shock resistance. It has now being widely used in the lining of the ladle, open hearth, and the cement rotary kiln. Rongsheng produce and sales this kind of refractory bricks.

High Quality Magnesia Spinel Refractory Bricks
High Quality Magnesia Spinel Refractory Bricks

Magnesia Spinel Refractory Bricks Composition

Magnesia Spinel Refractory Brick contains magnesia alumina spinel about 20-30%. While, the spinel bricks used in the ladle contains 30-40%, because of the complicated factors. So is that, in the process of making bricks, fused magnesium and corundum power should be added.

The quality of the magnesium aluminate spinel is the key to the Magnesia Spinel Refractory Bricks. Due to the maturity of the technique of the magnesium aluminium spinel, the characters of the spinel refractory bricks are remarkably improved in recent years.

  • Magnesia alumina spinel: 20-30%
  • Such bricks used in the ladle: 30-40%
  • Other materials: fused magnesium and corundum power
Spinel Refractory Bricks for Sale
Spinel Refractory Bricks for Sale

Magnesia-Alumina Spinel Bricks Properties

Magnesia Spinel Refractory Bricks are featured with high melting point, low thermal expansion coefficient, low thermal stress, alkali slag resistance, good creep resistance, high refractoriness under load, good thermal shock resistance and spalling resistance. In addition, it is resistant to basic slags with stable chemical properties, which is the key factor that improves the service life of the thermal equipment, and the main reason of the application of the magnesia alumina spinel unburned brick.

  • High melting point and low thermal stress
  • Low thermal expansion coefficient
  • Alkali slag resistance
  • Spalling resistance
  • Good creep resistance
  • Good thermal shock resistance
  • High refractoriness under load
Spinel Refractory Bricks
Spinel Refractory Bricks

Magnesia Spinel Refractory Bricks Specification

Items Index
MgO,  % ≥82
Al2O3  % 13-15
Fe2O3  % ≤0.8
Bulk Density,(g/cm3) ≥2.98
Apparent Porosity,  % ≤17
Cold Crushing Strength,  MPa ≥60
Refractoriness Under Load, °C, [0.2MPa×0.6%] ≥1700
Thermal Shock Resistance, Times,  [1100°C, water-cooling] ≥15
Refractoriness, °C ≥1800

Spinel Refractory Bricks Manufacturing  Methods

The production process of the Magnesia Spinel Refractory Bricks is as follows: Magnesia crushing, grinding and selecting, mixing, forming, drying and firing.

In detail, magnesia and the magnesia alumina spinel is broken, making the aggregate and power meet the requirement.

Then, weighting and compounding the aggregate and power, adding some binders, such as the sodium ailicate solution, and the polyphosphate, which improves the strength in the heating process.

Next, mixing the materials in the mixing mill, about 15-20minutes, molding the semi-manufactured products in the brick machine, about 8-16 hours.

And lastly, firing the dried adobes in the tunnel kiln at high temperature about 1660-1680℃.

Magnesia Spinel Bricks Applications

Spinel refractory bricks are used in the following parts:

  • Lining of the ladle
  • Roof of the open hearth
  • Sintering zone of the cement rotary kiln
  • Converter
  • Heating furnace
  • Blast furnace
Magnesia Spinel Refractory Bricks Manufacturer
Magnesia Spinel Refractory Bricks Manufacturer

Magnesia Spinel Refractory Bricks Manufacturer

Zhengzhou Rongsheng Kiln Refractory Co. Ltd, has established more than decades, it has become a comprehensive enterprise producing refractory materials in metallurgy, building materials, electric power and chemical industry, etc. Rongsheng 2 refractory factories, the refractory bricks and refractory castables are equipped with advanced production equipment to efficiently complete customer orders.

RS Refractory Bricks: high alumina bricks, magnesia bricks, carbon bricks, silicon bricks, corundum brick and fireclay bricks, etc.

RS Unshaped Refractory: refractory castable, high alumina cement, low cement castables, and wear resistance castable, etc.

RS Refractory Products have passed the ISO9001:2005 Quality Certification. In addition, Rongsheng has established cooperative relations with multiple scientific research institutes, so we can ensure you the superior quality of Magnesia Spinel Refractory Bricks.

Rongsheng has exported such magnesia carbon bricks to Ireland, Banglagdesh, Indonesia, Vietnam, etc. Welcome the you to check the price and buy Magnesia Spinel Refractory Bricks from RS!