Magnesia Chrome Brick

Magnesia chrome brick is a kind of fire bricks with MgO and Cr2O3 as main components, periclase and spinel as main mineral components. Magnesia chrome brick has good performance in high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and a certain degree of adaptability to acidic slag. The main raw materials of manufacturing magnesia chrome brick are sintered magnesia and chromite.

Magnesia chrome brick is mainly used in the metallurgical industry, such as open hearth furnace top, electric furnace top, outside refining furnace and a variety of non-ferrous metal smelting furnace. Besides, it is also used in the sintering zone of cement rotary kiln and regenerator of glass furnace, etc. So, if you are interested in the magnesia chrome bricks, please contact us for free price list!

Introduction Of Magnesia Chrome Brick

Magnesia chrome brick is a alkali refractory product with periclase and magnesite as the main crystal phase. Magnesia chrome brick has good performance in high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and a certain degree of adaptability to acidic slag. The main raw materials of manufacturing magnesia chrome brick are sintered magnesia and chromite. Magnesia chrome brick is mainly used in the metallurgical industry, such as open hearth furnace top, electric furnace top, outside refining furnace and a variety of non-ferrous metal smelting furnace. Besides, it is also used in the sintering zone of cement rotary kiln and regenerator of glass furnace, etc.

Properties Of Magnesia Chrome Brick  

Magnesia chrome brick belongs to alkaline refractory material. It has the following features:

• High refractoriness
• Good high-temperature performance
• Anti-corrosion
• Excellent thermal shock resistance
• Strong alkaline slag erosion resistance
• Good thermal shock stability

Specifications of Magnesia Chrome Brick 

Chemical and Physical Index of Magnesia Chrome Brick
Item/Index	RS-MGe-18	RS-MGe-16	RS-MGe-12	RS-MGe-8
MgO%≥	45	50	55	60
Cr2O3%≥	18	16	12	8.0
Apparent Porosity≤	22	22	20	20
Bulk Density/g/cm3 ≥	3.05	3.0	2.95	2.90
Cold Crushing Strength/MPa ≥	30	30	30	35
0.2MPa Refractoriness Under Load/℃ ≥	1550	1550	1550	1530

Classifications of Magnesia Chrome Brick 

According to the content of major chemical components, International standards ISO1109 divide magnesia chrome brick series into the following types:

• Magnesia chrome brick: 55%≤ MgO<80%
• Chrome magnesia brick: 25%≤MgO<55%
• Chrome brick：Cr₂O₃≥25%, MgO≤25% ( Basically, chrome brick is totally made of chrome ore.)

According to the difference of the combined amount of MgO and Cr₂O_3, magnesia chrome brick can be classified into the following series:

• Fused-Rebonded magnesia chrome bricks
• Direct combination of magnesia chrome bricks
• Sintered magnesite chrome bricks
• Special magnesia chrome bricks

1. Rebonding magnesia chrome bricks of synthesis method is adopted fused magnesite chrome spinel as the main raw material, after high-pressure forming, high temperature sintering made a good erosion resistance performance of high-grade produce excellent special.
2. Direct combination of mg -chrome bricks with high purity magnesia and chrome ore as raw material, high-pressure molding, high-temperature sintering, with anti-corrosion, high temperature and other characteristics suitable for nonferrous metals, seel and other high -temperature furnace.
3. Sintering magnesite chrome bricks is in a first magnesia and ordinary chromium ore, after high-pressure forming, temperature sintering made an ordinary alkaline products, the products have a good high temperature performance and slag erosion performance.
4. Special magnesia chrome brick is directly combined by high purity fused magnesia clinker and highpurity chromium concentrate and high-temperature composite toughening agents, the high -pressure forming , high temperature sintering made a performance special excellent product, it not only good erosion resistance performance is good, and thermal shock resistance than magnesia chrome bricks directly combined much better, this product has good solve erosion resistance performance and thermal shock resistance can’t sync contradiction.

Compositions of Magnesia Chrome Brick 

Generally, the main raw materials of producing MgO-Cr₂O₃ are magnesia, chrome ore, synthetic magnesium chrome sand. And the production technology of calcined magnesia chrome brick is the same as that of magnesia brick.

Magnesia chrome brick is a kind of refractory product with MgO and Cr2O3 as main components, periclase and spinel as main mineral components.

• Raw materials: magnesia, chrome ore,synthetic magnesium chrome sand
• Chemical component: MgO and Cr2O3
• Main mineral components: periclase and spinel

Production process of Magnesia Chrome Brick 

The manufacture process of magnesia chrome bricks is similar to that of magnesia bricks. In order to eliminate the loosening effect caused by the expansion of the spinel when the brick is sintered during the firing process due to the reaction of MgO and Cr₂O₃, Al₂O₃ or the oxide of direct combination magnesia chrome brick, the common co-sintered material can also be used to make the magnesia chrome brick.

In addition, there are non-burned magnesia chrome bricks, for example, non-fired magnesite-chrome bricks combined with an inorganic magnesium salt solution. The non-fired magnesium chrome brick has a simple production process, low cost, and good thermal stability, but the high temperature strength is far lower than that of a fired brick.

Applications of Magnesia Chrome Brick 

Magnesia chrome brick has a wide range of uses. It can be applied in the metallurgical industry, architectural material industry, and other non-ferrous smelting furnace. Magnesia brick has almost been replaced by the magnesia chrome brick in the steel and non-ferrous metal smelting industry. Besides, magnesia chrome brick is used in the cement rotary kiln, glass kiln and other thermal equipment. In detail, it can be used in the following parts:

• Open hearth furnace, Outside refining furnace, Electric furnace
• Non-ferrous metal smelting furnace
• Sintering zone of cement rotary kiln and regenerator of glass furnace
• Flash furnace analyze reaction tower and sedimentation tank
• Tap hole, and permanent lining

Magnesia Chrome Brick Supplier

Rongsheng Kiln Refractory Material Co., Ltd. is located in Xinmi City, Henan Province, China. RS company upholds the consistent business philosophy, pursues the tenet of “honesty, humility, innovation, and dedication” and regards “high quality and low price” as the cornerstone of the company’s development. RS regards “Rongsheng Brand” as our strategic target. After more than 20 years of development, Rongsheng has formed a scientific management process and a sound customer information management system. What’s more, RS manufacturer has established long-term cooperative relations with multiple enterprises from home and abroad with its good corporate image, excellent product quality and consummate after-sales service. So our company RS can provide our customers with satisfactory, timely and efficient services. What are you waiting for? Please feel free contact us to buy what you want!