Status and Prospects of Development of Production of Glassy Foamed Heat-Insulation Materials

Tereshchenko, I. M.; Dormeshkin, O. B.; Kravchuk, A. P.; Жих, Б П

doi:10.1007/s10717-017-9965-5

Cited by 11 publications

(4 citation statements)

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“…Note, however, that the main process obstacles to the disposal of these wastes are the instability of their properties, the presence of impurities, and the inadequate knowledge of the physicochemical processes that occur during the heat treatment of the feeds. A resource-and energy-saving process for obtaining the heat-insulating material "Siver" with a density of less than 150 kg/m 3 based on the silica gel, a fluorosalt by-product, was proposed in [20]. In [21], another promising process was discussed-the low-temperature synthesis of glass foamed heatinsulating materials based on phosphate ore processing waste.…”

Section: Introductionmentioning

confidence: 99%

“…A resource-and energy-saving process for obtaining the heat-insulating material "Siver" with a density of less than 150 kg/m 3 based on the silica gel, a fluorosalt by-product, was proposed in [20]. In [21], another promising process was discussed-the low-temperature synthesis of glass foamed heatinsulating materials based on phosphate ore processing waste. In [22,23], the copper-zinc ore concentration tailings of the Zhezkazgan deposit in Kazakhstan were studied as a feedstock for obtaining a granular material similar to foam glass, using a low-temperature process without complete melting of the feed.…”

Section: Introductionmentioning

confidence: 99%

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Obtaining Foamed Glass-Ceramics from Diamond Concentration Tailings

et al. 2023

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The possibility of obtaining building foamed glass-ceramic using the diamond concentration tailings of the Lomonosov deposit in Arkhangelsk Region, Russia, is demonstrated here. The effect of the tailings’ particle size distribution, feed temperature, the addition of a foaming agent, and the content of oxidizer on the feed charge foaming is established. The process conditions for obtaining foamed glass-ceramic materials are described. The specifications of the materials with the optimal composition (tailings 50 wt.%, glass waste 50 wt.%, SiC 0.5 wt.%, Fe2O3 1 wt.%) foamed at 1020–1050 °C were as follows: apparent density 0.23–0.51 g/cm3, compression strength 0.58–2.40 MPa, water absorption (by volume) 8.7–19.0%. Based on the combination of the measured properties when used in dry conditions, the obtained materials can be considered heat-insulating foam materials. The thermal conductivity was 0.060–0.066 W/m·K.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Obtaining Foamed Glass-Ceramics from Diamond Concentration Tailings

et al. 2023

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“…Such raw materials include, in particular, sewage sludge from municipal wastewater treatment plants, different coal fly ashes, and some others [1][2][3][4]. The technology of "hydrate" foaming is based on the dehydration of alkaline hydro-silicates (either formed by the interaction of NaOH with silicate raw materials or specially introduced into the mixture in the form of waterglass) and foaming of the silicate mass by the released water vapor [5][6][7][8][9][10][11][12][13]. Both of these mechanisms are currently used in laboratory studies and have not been implemented in real production.…”

Section: Introductionmentioning

confidence: 99%

Role of Carbon Phase in the Formation of Foam Glass Porous Structure

Гольцман

Yatsenko

2022

Materials

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The production of durable, non-combustible, heat-insulating materials is currently very important. One of the most promising materials is foam glass. Modern enterprises widely use organic foaming agents in foam glass production. The purpose of this work is to study the role of the carbon phase formed during the organic foaming agent’s (glycerol) thermal destruction in the processes of glass mass foaming. The samples were synthesized using the powder method with high-temperature treatment. Different ratios of glycerol and waterglass in a foaming mixture showed that amount of glycerol should be less than in waterglass. Otherwise, the amount is excessive and the glycerol burns out. It was shown that the quantitative description of the carbon phase structure and properties is complicated by its nanometer size and fusion into the glass. Theoretical calculations demonstrate that carbon particle size cannot be greater than 535 nm. Using a set of methods, it was proved that the carbon phase is represented by nanometer particles of amorphous sp2-carbon. Therefore, the foaming mechanism includes nanoparticles settling and immersing into the glass surface, a reaction of carbon with the sulfate ions from glass with a release of gases. Conclusions on foaming intensification via using sulfur additions and other organic foaming agents were drawn.

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“…полученных с использованием жидкостекольного связующего и минеральных наполнителей, в связи с доступностью исходных компонентов и простотой исполнения [1][2][3][4][5][6][7]. На основе щелочно-силикатных сырьевых смесей совместно с минеральными наполнителями возможно создание пористых теплоизоляционных материалов с ценными свойствами: низким коэффициентом теплопроводности, устойчивостью к перепадам температур, биологической и химической стойкостью, негорючестью, экологичностью и т. д.…”

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