I. V. Scientists from the Institute of Rare Elements and Mineral Raw Materials Chemical Technology and the Institute of Northern Industrial Ecological Research conducted a joint study on the possibility of obtaining an inorganic block-like insulating foam based on silica and ash-containing inorganic bulk thermally insulated foam. These materials are particularly relevant to the Arctic. After all, the Russian Arctic is an active mining area, so it is best to use local raw materials to make building materials, especially artificial waste: the "tails" of mining companies, the ash waste from thermal power plants. This allows you to produce “green” and reduce emissions and waste storage areas.
can use ash slag to obtain thermal insulation material
Modern industry increasingly needs effective thermal insulation materials. Without it, the so-called green building has no way to talk about. They can save energy and other resources due to their low thermal conductivity, processability, high strength, light weight and durability, as well as fire resistance, chemical and biological effects.
Foam glass material (foam glass and its analogs - foam silicate) meets these requirements as much as possible. However, their range is limited by a high trend in hygroscopy. Waterproofing and other modifiers can be used to optimize the properties of silicate foam. The use of additives helps simplify the structure of the material and improves its physical and mechanical properties.
Under Arctic conditions, the demand for energy-saving building has increased many times. The Russian Arctic is an active mining area, so it is best to use local raw materials to make building materials, especially artificial waste: the "tails" of mining companies, and the ash waste from thermal power plants. This allows you to produce “green” and reduce emissions and waste storage areas. In addition, the use of artificial raw materials greatly reduces production costs.
Macrostructure of foam silicates without additives and additives
For many years, the Kola Science Center has been committed to the complex processing of mineral raw materials and the development of new technologies to create functional materials most effectively. I. V. Tananaev Institute for Chemical Technology of Rare Elements and Mineral Raw Materials and Northern Institute for Industrial Ecology Research jointly studied industrial waste materials on the possibility of obtaining inorganic block thermally insulated foam materials based on silica and ash. The results of this study are published in the journal Glass and Ceramics.
As the raw material for synthetic foam materials, the by-products containing silica during the processing of eudialyte ore of the Lovozero deposit (microsilite), the "tailings" of the Khibiny deposit, the ash mixture and dust of the ash from the Apatitskaya CHPP were taken away. Liquid glass is prepared based on microsilicon powder , and modification additives (phosphorus stone ore processing products and waste ash) are added, molded, foamed, and quickly cooled the fixed structure according to a certain temperature-time law, and then annealed.
experiments show that the addition of artificial waste increases the strength of foamed materials and makes them more resistant to moisture. Scientists explain this phenomenon by amorphous silica that can wrap the surface of mineral particles, forming strong components. The best performance is the material obtained by adding 5-15% ash or mixture of ash and slag. Synthetic Material has all the required properties and is suitable for the manufacture of thermal insulation and structural insulation products in "green" buildings.
