Brief Introduction
Dry ramming mass is a kind of amorphous refractory raw material that needs to be rammed by manual or mechanical methods and hardened in a hot state above room temperature.
Dry ramming mass’ types generally include clay, high alumina, mullite, corundum, silicon, magnesium, silicon carbide, mullite corundum.
We Rongsheng Refractory, can produce dry ramming mass products with different compressive strength and refractory temperature.
Technical Data
The price of ramming mass varies depending on the brand, specification and application. The following are Rongsheng’s reference specifications, and our products support customization!
| Item | Parameter | ||||
| NM-1 | NM-2 | NM-3 | NM-4 | ||
| Al2O3 % | ≥70 | ≥75 | ≥80 | ≥85 | |
| Volume density g/cm3 110℃×24h | ≥2.6 | ≥2.75 | ≥2.8 | ≥2.9 | |
| Compressive strength at room temperature MPa | 110℃×24h | ≥60 | ≥65 | ≥70 | ≥75 |
| 1400℃×3h | ≥90 | ≥95 | ≥105 | ≥110 | |
| Flexural strength at room temperature MPa | 110℃×24h | ≥8.5 | ≥9 | ≥10 | ≥11 |
| 1400℃×3h | ≥13 | ≥14 | ≥15 | ≥16 | |
| Wear loss at room temperature cm3 | ＜9.6 | ＜8.5 | ＜7.3 | ＜6 | |
| Softening start temperature under load 0.2MPa℃ | ＞1450 | ＞1490 | ＞1530 | ＞1560 | |
| Thermal shock stability times 900℃ water cooling | ＞20 | ＞20 | ＞20 | ＞20 | |
| Maximum operating temperature ℃ | 1550 | 1550 | 1600 | 1600 | |
| Change in permanent line after heating % | ＜-0.3 | ＜-0.3 | ＜-0.2 | ＜-0.2 | |
Application
Dry ramming mass is mainly used for ramming construction of various high-temperature industrial furnace linings.
1. Metallurgical industry: Dry ramming mass is widely used in the lining of induction furnaces, aluminum smelting furnaces, tundishes, and steelmaking electric furnaces.
2. Foundry industry: It is mainly used as a lining material in medium-frequency furnaces to melt various metals and alloys.
3. Building materials industry: Dry ramming mass is also suitable for high-temperature equipment in the building materials industry, such as cement rotary kilns, glass melting furnaces, etc.
4. Chemical and machinery industries: It is used to manufacture various high-temperature and corrosion-resistant parts and equipment.