Review article

Obtaining of heat-insulating materials based on silica-containing waste with the addition of dolomite

UDC: 

666.189.3

DOI: 

10.23968/1999-5571-2020-17-6-149-155

Pages: 

149-155

Annotation: 

The paper presents the results of the study of feasibility of obtaining high-quality foamed thermal insulation materials based on a silicate matrix with addition of dolomite. It has been found out that the preliminary activation of a suspension based on a silica-containing component at a temperature of 90°C for 5-7 minutes allows accelerating the coagulation of silica fume and the synthesis of sodium silicates. Optimal foaming conditions for the charge frothing are 650-700°C for 25 minutes. There have been obtained foam silicates with a relatively uniform finely porous structure and stable physical and technical properties with density 0.38-0.48 g/cm³, strength up to 3 MPa, thermal conductivity 0.048-0.054 W/(m·K).

Authors: 

Manakova N. K. Tananaev Institute of Chemistry - Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” Science Centre of Russian Academy of Sciences Apatity, Russia

Suvorova O. V. Tananaev Institute of Chemistry - Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences” Science Centre of Russian Academy of Sciences Apatity, Russia

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