Mining Rescue capsule insulation applications
The space inside the mine is extremely limited. To ensure the living space and living conditions of trapped miners, Rescue capsule has extremely high requirements on various properties such as thermal insulation, temperature resistance, corrosion resistance, strength and aging resistance.
A Class Rescue capsule, for example, requires per capita possession volume of not less than 1m3; instantaneous temperature capability [at an instantaneous ambient temperature of 1200 ℃ (≤0.2s)]; rated protection time at a continuous ambient temperature of 55 ℃, 96h The temperature is not higher than 33 ℃ ± 2 ℃. Therefore, an airgel insulation mat with super-low thermal conductivity, ultra-low thickness, high temperature resistance, corrosion resistance and explosion-proof impact resistance is undoubtedly the best insulation material for mining Rescue capsule.
Rescue capsule application of insulation materials
Existing mining Rescue capsule more use of aluminum silicate fiber felt or rock wool insulation materials, in use mainly in the following defects:
1. High thermal conductivity, poor insulation, it is difficult to ensure Rescue capsule insulation requirements.
2. Thick insulation thickness, so that the original space is more crowded more crowded, evasive environment is poor, it is difficult to ensure the per capita space Rescue capsule requirements.
3. Water absorption, moisture absorption, easily lead to deterioration of insulation, cabin temperature does not meet the design requirements, the survival of people trapped adversely affected; long-term use is also likely to lead to bulkhead corrosion, strength, Rescue capsule Insufficient capacity to deal with the explosion and so on.
4. Seismic, impact resistance is poor, when subjected to vibration, easily lead to material compression, deformation, thermal insulation worsened.
5. Rock wool instantaneous temperature performance is poor, after the explosion or combustion resulting in reduced insulation, difficult to meet the conditions of refuge, can not guarantee the life and safety of miners.
6. Insulation performance easy to decay, natural chalking led to its short life expectancy, only 3 to 5 years, continue to use will bring some security risks.
Aerogel insulation for the benefit of Rescue capsule insulation
Compared with the main performance of traditional materials
|
Item |
Aerogel insulation blanket |
Rock wool |
Aluminium silicate fiber blanket |
|
|
Thermal conductivity，W/(m•K) |
0.018 |
0.035 |
0.038 |
|
|
density，kg/m3 |
180 |
100～120 |
||
|
Hydrophobic rate |
≥99% |
0 |
||
|
Service life，years |
20 |
3～5 |
||
|
compressive strength |
10% |
60Kpa |
Large compressive deformation |
|
|
25% |
120Kpa |
|||
|
tensile strength |
100Kpa |
fragile crack |
||
|
Seismic performance |
Excellent |
Easy to appear slag ball down, cotton body sagging, elongated, and even fragmentation |
||
|
moisture absorption（vol%） |
0.32 |
5 |
||
The main advantages of aerogel insulation blankets for Rescue capsule
1. The special structure of airgel and its waterproof and compressive properties make it can last more than 20 years, which is much higher than that of traditional materials.
2. Nano-hole structure creates a low thermal conductivity of airgel insulation blankets, the best insulation, safer and more comfortable living conditions for the trapped workers to provide better security.
|
Item |
Aerogel insulation |
Aluminium silicate |
Rock wool |
|
|
Thermal conductivity，W/(m•K)，25℃ |
0.018 |
0.038 |
0.035 |
|
3. Ultra-low insulation thickness, save more space in the cabin, save more life-saving materials, improve per capita living space, create better conditions for asylum and win more valuable time for rescue work.
4. With excellent overall water resistance, water repellency ≥ 99%, with lotus-like hydrophobic effect, while allowing water vapor to pass, to avoid moisture absorption Corrosion of bulkheads, mine is the best choice for thermal insulation materials in wet conditions
5. Excellent high temperature stability, excellent instantaneous temperature capability, Rescue capsule to provide unparalleled fire protection.
6. Special nano three-dimensional network structure gives the airgel a good explosion-proof, shock resistance, seismic performance, heat insulation performance is stable and lasting, effectively enhance the safety and reliability of Rescue capsule.
7. Does not contain harmful substances, green.
8. Soft and light, easy to cut, easy to install, save costs.
Aerogel Insulation Solution：
According to China's standard requirements, Class A Rescue capsule (10 people) for example, the size of the rescue cabin is generally 10m × 1.4m × 1.8m, the rated protection time is not less than 96h, the continuous ambient temperature of 55 ℃ conditions, the cabin temperature is not Above 33 ℃ ± 2 ℃. It is recommended to use two layers of 10mm aerogel insulation blanket as the insulation to achieve the required standard insulation.