Complaint
Refractory Materials and Masonry for Torpedo Tank
Process Specification
Description of Torpedo Tank Masonry Plan
1. Description of Refractory Materials for Torpedo Tank
a. Due to the particularity of the working conditions of the torpedo tank, the working layer (especially the impact area and the slag line) has been subjected to erosion and slag erosion by molten iron for a long time, and the operating conditions are relatively harsh. Combined with our factory's 20 years of experience in producing refractory materials for torpedo tanks, it is considered that it is an ideal design scheme to use aluminum carbide silicon carbon bricks for the working layer.
b. Semi-light clay bricks are used for the permanent layer, which has the effects of lightweight and heat preservation. It can not only reduce the overall weight of the torpedo tank, which is convenient to run and operate, but also has a certain heat preservation effect, better ensures the quality of molten iron, and can reduce the temperature difference inside the torpedo tank to the best level, and better protect the torpedo tank service life.
2. Physical and Chemical Indicators of Refractory Materials for Torpedo Tank
Aluminum silicon carbide carbon brick (working layer part)
| Name and Specification | Unit | XER-B-1 | XER-B-2 | XER-B-3 |
| Al2O3 ≥ | % | 67 | 66 | 65 |
| Carbon≥ | % | 8 | 8 | 8 |
| SiC≥ | % | 8 | 8 | 7 |
| Bulk Density≥ | g/cm3 | 2.70 | 2.65 | 2.60 |
| Apparent Porosity≤ | % | 8 | 8 | 9 |
| Cold compressive Strength≥ | Mpa | 50 | 45 | 40 |
| High Temperature Flexural Strength 1400ºC×0.5h≥ | Mpa | 6 | 5 | 4 |
| Application Area | Impact zone | Lower 1/3 | The remaining large area |
Semi-lightweight Insulating Clay Bricks (permanent layer part)
| No. | Item | Unit | Indicator |
| 1 | Al2O3 ≥ | % | 42 |
| 2 | Bulk density≥ | g/cm3 | 2.0 |
| 3 | Cold compressive strength≥ | Mpa | 25 |
| 4 | Refractoriness≥ | ºC | 1750 |
| 5 | Application area | Permanent layer |
Aluminum Carbonaceous Mud HM-SC3 Physical and Chemical Indicators
| Al2O3 % | C % | SiC % | Mpa Bond Flexural Strength | Particle Size | Bonding Time | |
| ≥60 | 4.5 | ≥9 | 110ºC×24h | ≥1mm | ≤0.088mm | Min |
| ≥2.5 | ≤2 | ≥50 | 1-3 | |||
Physical and Chemical Indicators of Permanent Layer Castable FL-130
| Al2O3 % | Operating Temperature | Bulk Density | Mpa Flexural Strength |
| 110ºCg/cm3 | 110ºC | ||
| ≥50 | 1400 | ≥1.95 | ≥2.0 |
Physical and Chemical Indicators of Steel Fiber Reinforced Castable CST-TP7 for Tank Mouth
| Al2O3 % | Mpa Compressive Strength | Maximum Operating Temperature | Application Area | Refractoriness |
| 110ºC×24h | ||||
| ≥80 | ≥35 | 1550 | Tank mouth | ≥1790 |
Note: The amount of steel fiber added is 4-5%
Clay Mud NJ-42 Physical and Chemical Indicators
| Al2O3 % | Refractoriness | Mpa Bond flexural strength | Particle size | Bonding time | ||
| ºC | Drying at 110°C | 1200ºC×3h | ≥0.5mm | ≤0.088mm | min | |
| ≥42 | ≥1710 | ≥2 | ≥4.9 | ≤2% | ≥50% | 1-2 |
3. Supplementary Instructions for the Design Scheme of the Torpedo Tank
Description of Material Structure
In this plan, ASC bricks are used in the working layer, and semi-light clay bricks and spray paint are used in the non-working layer.
a. The use of ASC bricks in the working layer can effectively resist the slag erosion in molten iron, which is of great significance to the slag line and the impact zone, which can directly affect the use effect of the torpedo tank and can better improve the service life of the torpedo tank.
b. The semi-lightweight clay bricks are used for the permanent layer, which can have a better heat preservation effect, minimize the temperature difference in the tank, reduce the weight of the torpedo tank, and have a better heat preservation effect and better play a protective role.
c. Using this design plan in structure, the overall structure is relatively ideal, and all parts achieve simultaneous erosion, which is conducive to saving resources, reducing costs, and maximizing the service life of the torpedo tank.
Lining Maintenance
The length of the life of the lining is directly related to the maintenance during the use of the lining. The maintenance is divided into major repair, medium repair and minor repair. In addition, manufacturers with suitable conditions can use thermal spray lining or ramming with spray paint for maintenance.
Major repair (Overhaul): After cooling, all working layers and non-working layers are removed. On the basis of ensuring the quality of brick lining manufacturing, masonry quality and strengthening maintenance management, the overhaul cycle without decarbonization, desulfurization, dephosphorization treatment can be about 1500 times; the overhaul cycle with decarbonization, desulfurization, dephosphorization treatment is about 1000 times.
Medium repair: After cooling, the non-working lining bricks are not removed, and some parts of the working layer bricks (such as the impact area, slag line and tank mouth, etc.) are repaired. The medium repair cycle is generally about 500 times and 800 times.
Minor repair: only repair the damaged parts during use, about 300 and 700 times of use, the main parts are the mouth of the tank and some brick joints in the tank, etc.
The above maintenance cycles for major repair, medium repair and minor repair are for reference only, and the specific maintenance cycles should be determined according to the actual erosion of the inner lining of each factory;
Note: Both sides of the torpedo tank can be loaded and poured out of molten iron. In order to avoid the washing of the molten iron on the bottom lining of one side of the tank when loading and pouring out the molten iron, the two sides should be replaced periodically to load and pour out the molten iron;
Auxiliary facilities for lining maintenance include: cooling field, dismantling field, spraying field, masonry room, and drying field.
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