There are not so many "win-win" directions, which quickly pay off and bring a consistently high profit to the manufacturer. To this direction the release of slag wool can be safely attributed. Considering the high demand for heat-insulating products on the market, a slag wool factory can be a highly profitable business - even for beginners.
Slag wool is a material meant for interior and exterior heat insulation of walls, floors and ceilings. It is used in the construction of residential and industrial facilities. High popularity is due in many respects to the low price for products. At the same time, its quality is not inferior to more modern heaters.
Foto: Wikipedia.org ©
Spheres of application of slag wool.
Since slag wool is a natural non-combustible and durable material (95% consists of natural stone), it has been widely used in construction since the beginning of the 20th century. Thanks to its excellent properties, which consist in reducing heat losses in the cold period of time, and in reducing the heat energy entering the building in the summer, stone wool is widely used in the following areas: For heat insulation of facades of buildings with subsequent plastering or installation of a siding or profile sheet; For heat insulation of room from the inside (balconies, loggias, external walls); For erecting partitions from gypsum plasterboards in apartments, industrial or office buildings for soundproofing. For heat insulation the base of the floor with a subsequent pouring of the screed. For soundproofing of "floating floor". For constructing a roof or warming the attic floors. For fire protection of engineering structures and networks (this material is able to withstand temperatures up to 700 ° C).
Composition of fibers of slag wool:
Silicon dioxide SiO2 in an amount from 45 to 55%
Titanium dioxide TiO2 with a mass fraction from 1.36 to 2%
Calcium oxide CaO in an amount from 7 to 11%
Iron oxides FeO and Fe2O3: from 5.38 to 13.5%
Manganese oxide MnO2: from 0.25 to 0.5%
Aluminum oxide Al2O3: from 14 to 20%
Magnesium oxide MgO: from 3 to 8%
Sodium and potassium oxides (Na2O, K2O): from 2.7 to 7.5%
Other: up to 5%.
The above compounds are linked together by bitumen, synthetic or composite binders, or with the help of special clay.
Production of slag wool begins with dosing and mixing of raw materials according to the technological recipe. Then the raw materials of rocks (basalts) are melted in a cupola at a temperature of 1500 ° C. Then the liquid lava is extracted into the stone fibers with a help of centrifuge, platinum-based dies and strong air currents. Various water-repellent additives and plasticizers are added to the received fibers. The formation of volume and shape is going next. By means of the corrugated machine, the slag wool layer is given the required geometric parameters. After this, at a temperature of the order of 200 ° C, a polymerization process takes place. Here slag wool gets its final properties. Then the slabs of the material are cut or rolled into a roll, and also the finished slag wool is stored before shipment to customers.