Product Description:
Refractories for RH refiniing furuace
Our company has chrome-free refractories integration technology for RH reflning furnace . We can provide customers whole service Iife solutions including overall design , optimal configuration , comprehensive masonry,on-site maintenance , and used refractories recovery and disposal . As the main drafter of T/ACR10003-2017 Periclase-spinel bricks for RH refining furnace ( a group standard of The Association of China Refractories Industry ), our company develops the series magnesium-aluminate spinel unburned bricks for RH refining furnace , which have been appraised as the green and environment friendly products by the expert committee of The Association of China Refractories Industry. The products are featured with high production efficiency, energy saving, environmental protection, superior performance, long service life and so on. Tested by Hubei Refractory Product Quality Supervision and Inspection Station, the product meets the requirements of Q/MGN 007-2018 standard. The products play an exemplary role in the green development of refractories, and reach the international advanced level.
1、Magnesium-aluminate spinel nuburned brick
The magnesium-aluminate spinel unburned bricks are prepared using high quality fused magnesite as main raw material, adding special additives, high pressure shaping and low temperature heat treatment. The bricks are featured with good thermal shock resistance, good corrosion and erosion resistance. Products with different brands are suitable for different service areas.
Physical properties and chemical composition of Magnesium-aluminate spinel unburned brick
2、Snorkels
The RH refining furnace snorkels are comprehensively lined using MA95 magnesia spinel bricks and high quality corundum spinel castables. The circulation tubes are assembled using MA95 magnesia spinel bricks. The products are featured with good corrosion and erosion resistance, and thermal shock resistance.
Physical properties and chemical composition of Snorkels
- Q:What are the characteristics of Mg rich spinel and aluminium rich spinel?
- Occurs in the contact metamorphic zone of acid intrusive rocks and dolomite and dolomitic limestone, and is associated with forsterite, diopside and so on. It is also found in peridotite, Kimberley rock, magnesian porphyry and some crystalline schist.
- Q:The difference between aluminium refractory and magnesia refractory
- Aluminum refractory belongs to neutral refractory material, usually refers to silicon aluminum refractory materials, such as: high alumina brick, clay brick, high alumina castable and other products, the production of raw materials is mainly bauxite.
- Q:Characteristics of sintered spinel used in refractory zzjsnc
- For the production of castable for ladle lining steel plate greatly improve the anti erosion ability. It is widely used in steelmaking refractories provides new raw material for the production of high quality synthetic stone pre sintered spinel prepared amorphous and amorphous high purity refractory material
- Q:Is magnesium spinel harmful to the body? Such as title magnesium spinel, harmful to the body?
- The long-term intake of aluminum will eventually harm the health of the human body. These two elements are not soluble and can cause pneumoconiosis and lung cancer after inhalation.
- Q:Spinel compound brick composite layer pollution layer does not affect the use of theoretical basis for it
- The chemical composition of magnesia spinel brick has an important effect on the performance of. The suitable chemical compositions of spinel are 8%~20%, cao0.5%~1.0%, fe2o30.2%~8%, sio2<0.4%, B2O3 and alkali. The impurity content is less than 0.3%, and the rest is mgo. When the Al2O3 content is less than 8%, less content of spinel crystals, intergranular directly binding to periclase and periclase magnesia brick, showing the shortcomings, namely spalling resistance difference. When the content of Al2O3 is more than 20%, the corrosion resistance of brick decreases. When cao<0.5%, fe2o3<0.2%, spinel mineral crystal is less than 5mm or more hours, almost as crystal direct binding between periclase and periclase, which shows the disadvantages of magnesia brick. With the increase of the content of Cao and Fe2O3, the liquid phase formed by the low melting point of cao-al2o3-fe2o3 system is formed, which makes the spinel crystal grow up and the anti flaking property produced by the spinel crystal can be exploited. But when cao>1%, fe2o3>0.8%, cao-al2o3-fe2o3 system low melting point liquid phase increased spinel crystal size is more than 20mm, because cao-al2o3-fe2o3 system low melting material increased the thermal strength decreased. When the content of SiO2 is more than 0.4% and the content of impurities such as B2O3 and base is more than 0.3%, more low melting substance is produced, and the thermal strength of the brick decreases. The content of Al2O3 in the range of 8%~20%, the microstructure can be observed on spinel mineral evenly distributed in the periclase spinel mineral, the crystal size is about 5~20mm, the better comprehensive performance of brick.
- Q:What's the difference between iron spinel and magnesium aluminum spinel?
- Such as aluminum spinel, iron spinel, zinc spinel, manganese spinel, chromium spinel, etc.. Due to the inclusion of different elements, different spinel can have different colors, such as magnesium spinel in red, blue, green, brown or colorless between; zinc spinel is dark green; iron spinel black, and so on.
- Q:What is the significance of the synthesis of mg Al spinel? What are the main approaches?
- The synthesis of magnesia alumina spinel mainly uses MgO and Al2O3 raw materials, and is obtained by electro melting, sintering or sintering
- Q:What are the uses of magnesia spinel brick in the industry?
- Instead of magnesia chrome brick sand manufacturing magnesia spinel brick used in cement kiln, not only to avoid the chrome pollution, but also has good resistance to spalling;
- Q:Spinel refractory brick air-cooled razheng times
- The components of magnesia alumina spinel refractories can be magnesia alumina spinel, excessive alumina, or magnesium aluminate spinel with excessive amount of Magnesium Oxide.
- Q:What is the high-grade magnesia spinel brick?
- Using magnesia as main raw materials, matrix co milling with magnesia and bauxite as alkaline products, high temperature burning, called magnesia brick, also called the first generation of periclase spinel brick.
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Ruitai Ma Steel New Materials & Technology Co., Ltd.
