The Production, Performance and Eco Rate of Rock Wool
Rock wool has been produced naturally for centuries.During a volcanic eruption, a gust of wind blew up a molten lava, which was blown into filamentous wool like material. From this inspiration, the most popular and versatile products of rock wool were invented.Today’s rock and slag wool insulation are high-tech versions of their predecessors, produced from plentiful basalt and industrial slag.The application of rock wool is very diverse, including residential, commercial and industrial.The main performance of rock wool is thermal insulation and soundproofing, and the most special application is to be used as a fire barrier.
Performance of Mineral Wool
1. Among the whole service life of the building, all performances remain unchanged.
2. The R value will not change during the whole service life.Generally, the higher the density is, the better the insulation performance is.
3. Excellent fire performance, rock wool insulation has particularly good fire performance, and in the whole process of using, this performance will not change.
4. Rock wool insulation has particularly strong resistance to high temperature. With long time working temperature of 600 ℃ or lower will not change its performance or shape at all, so it is particularly welcomed by industrial applications.
5. Stable performance and not easy to corrode metal products.
6. Rock wool can also act as a fire barrier in some high-rise buildings.Some buildings are encouraged a balanced design, which includes a combination of active, detective and passive fire material.The application of the fireproof materials plays a vital role on some fire fighting accesses.
7. The fibrous structure can effectively reduce the transmission of sound, so that the sound energy will be changed into kinetic energy of vibration and then into thermal energy and disappear.
8. Rock wool is made of natural inorganic materials and cannot become food of bacteria, mice and other animals.
9. Hydrophobic performance: the R value of the insulation will be reduced after the absorption of water, cause water is the conductor of heat. While the rock wool is hydrophobic,the largest water absorption rate is 5%. That means if the rock wool contain 5% weight water, it will not absorb water any more. So, the insulation performance will not be affected by some high humidity environment.
Environmental protection performance of rock wool:
One of the most important environmental benefits of rock wool and slag wool insulation is their ability to make buildings more energy efficient. Energy-efficient buildings can use less energy to maintain the same level of indoor comfort.Improvements in energy efficiency provide protection to non-renewable energy sources, such as oil, and reduce emissions of carbon dioxide-- a greenhouse gas.This invention has improved public health and saved more lives reported by the Harvard University School of Public Health study.
Source of slag material:
Most of the slag comes from the byproduct of steel production, which would be a huge energy loss if wasted.And the production of rock wool and mineral wool need to use slag. These two insulation are made of similar materials, but with different proportions.Mineral wool can use up to 70% slag.The processing and utilization of production waste greatly reduces the total energy consumption during the processing process, which can save a lot of energy compared using natural raw materials.
The effect of rock wool on Green Rating Systems
There is an energy rating agency called Energy and Environmental Design (LEED), which allocates points to buildings that meets specific targets. Different points determine the LEED rating of buildings, and the use of environmentally friendly materials will increase the LEED rating, especially when using some recycled materials.