High Refractoriness Salt Immersion Treatment for Tuyere Area of Pierce Smith

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Magnesium chrome brick magnesia (MgO) and chromium oxide (Cr2O3) as the main ingredient, periclase and spinel as the main mineral components of refractory products. 

Magnesia chrome bricks have excellent slag corrosion resistance, high temperature and overheating damage resistance, vacuum damage resistance, oxidation reduction resistance, and erosion resistance. Magnesium chrome bricks are widely used in key parts of metal smelting kilns, especially working linings of smelting furnaces using vacuum, or acid-base changes of smelting slag, or strong oxidizing atmosphere, such as various high-quality steel refining furnaces. (RH or DH vacuum degassing furnace, VOD ladle vacuum degassing furnace, AOD argon oxygen refining furnace, ultra-high power electric furnace, etc.), large-scale non-ferrous metal smelting furnace (flash furnace, converter, anode furnace, Kaldor furnace, etc.) Working lining, hot spot area, slag line area, tuyere area, erosion area and other vulnerable parts.

After salt immersion treatment, the physical and chemical properties and use performance of magnesia-chrome bricks can be greatly improved. After salt immersion, the porosity of the product decreases by about 5.0%, the bulk density increases by about 0.05g/cm3, and the compressive strength increases by about 30MPa.

 Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Fused re-bonded magnesia chrome brick:

The magnesia chrome refractory for RH refining device developed by the Company has the characteristics of high purity.high fire resistance and good thermal stability.It’s applicable to large.medium and silicon steel RH refining devices, This project is tested on the RH silicon steel device in Wuhan lron & Steel.and the tested service life was increased by 20%.

The burnt magnesia chrome bricks are made out of high-quality magnesite and chrome ore fine charge mixture.According to different demands,adjust the content of Cr2O3,The product thermal stability and high-temperature performance are satisfactory,It’s widely used in the cement kiln and nonferrous metallurgical furnace etc.

1.Direct bonding magnesia chrome bricks choose the raw materials of chrome ore with low impurity content and magnesite with high quality and high purity,and adopt the high-pressure forming and over 1700℃ high-temperature sintering.The high-temperature performance is satisfactory,and the metallurgical slag corrosion resistance is strong.It can resist the corrosion of cement clinker,It’s widely applied in the electric furnace lining for steel making,nonferrous metallurgical furnace and cement rotary kiln etc.

2.The semi-rebonded magnesia chrome bricks and rebonded magnesia chrome bricks all or partially use the fused sand(fused synthetic clinker)as the raw materials,choose the fine charge mixture and adopt the high-pressure forming and super-high-temperature burning.The products have good particle bonding degree,high product strength and good volume stability.They are widely used in the secondary refining devices like RH,VOD and AOD,and nonferrous metallurgical furnace as well.

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Description of magnesia chrome bricks

High strength 

Corrosion resistance

Erosion resistance 

Excellent slag resistance 

Good thermal shock stability

Advantage of magnesia chrome bricks

The directly bonded magnesia-chrome brick has high temperature resistance, good corrosion resistance, thermal shock resistance and bulk stability under high temperature etc.

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Chemical & Physical Data Of Magnesia Chrome Bricks

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

1)Raw material to factory→checkout→burdening→stirring→mixing→taking out the raw material,
2)Crushing→Mixing→Shaping→Drying→Firing→Inspection→Packaging and Shipment.
2.Quality Assurance
1)Going out the furnace→checkout→packing→qualified product→putting in storage→sale,
2)The process from raw to product are strictly tested by equipment.
1.Inspection and Control of incoming raw materials: according to the chemical content,raw materials are classified into different levels to ensure quality of brick first.
2.Inspection and control of the process: during the production,every brick will be weighed twice strictly to reduce the error of weight .
3.Quality audit by quality management:  inspection of product standardization of quality of each product by process control and experimentation, taking corrective measures timely whenever deviations are noted.
4.Before delivery, the inspectors will inspect the size,appearance, physical and chemical properties of magnesia chrome bricks again in factory.

Fused re-bonded Magnesia Chrome Bricks for tuyere area of Pierce Smith converter

Jerry Li         

Cell&WhatsApp: 0086-13373957739 

Skype: live:.cid.b12dd76d43ac731e

Email: jerry(at)firebricks-supplies.com