With the continuous development of steel industry technology, the intensity and frequency of smelting are continuously improved. The magnesium repair spray refractory material is melted and the slag corrosion is increasing. Especially, the erosion and erosion of the slag line area and high temperature area are serious, resulting in uneven lining damage. In the end, the furnace must be replaced as a whole. Therefore, repairing the damaged part of the lining with the refractory material feeding is one of the important measures to prolong the service life of the lining, shorten the maintenance time of the furnace, and improve the utilization rate of the converter.
Spraying the repair furnace with refractory spray has the following advantages:
(1) Increasing the age of the converter and the operating rate of the furnace and reducing the cost of steelmaking.
(2) Improve the service life of the converter and reduce the frequency of large and medium repairs to ensure continuous and stable production.
(3) The spraying process is simple, easy to use, quick to repair, short in occupation time, and consumes less material and labor.
(4) When the spray is used, the amount of waste of the lining refractory brick is small, and the original lining refractory brick can be fully utilized.
Magnesium Repair Spray Refractory Castable Specification
| Brand |
RS-MG85 |
RS-MG70 |
RS-MG60 |
RS-MG50 |
| MGO（%）> |
85 |
70 |
60 |
50 |
| Modules of Rupture |
200℃*3h |
3 |
3 |
2.5 |
2 |
| |
1550℃*24h |
3 |
3 |
3 |
3 |
| Bulk density |
200℃*3h |
2.2~2.5 |
2.2~2.4 |
2.0~2.3 |
2.0~2.1 |
How to Choose Magnesium Repair Spray Refractory Castable
The spray material is made of high Mgo content and low magnesia, which are matched in a certain proportion, and the spray strength and adhesion rate are good. The proportion of large particles should not be too high, otherwise it will rebound easily. The binder is preferably a composite binder, which can improve the adhesion rate of the spray material. However, the amount of the binder should not be too small or too much, otherwise it will affect the adhesion rate of the spray and the erosion resistance of the material.
