A Method for Preparing Homogeneous Glass Batch

Крашенинникова, Н. С.; Фролова, И. В.; Kaz’mina, O. V.

doi:10.1023/b:glac.0000043084.37663.24

Cited by 6 publications

(4 citation statements)

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“…К недостаткам механоактивации можно отнести достаточно большие значения энергии измельчения в связи с твердостью частиц кварца (7 по шкале Мооса), а также возможное загрязнение аппаратным Fe, используемым в оборудовании помола или измельчения [9][10][11][12].…”

Section: Introductionunclassified

Physical and Chemical Activation of Quartz Raw Materials with Sodium Hydroxide in the Ratio of the Eutectic Composition in the Na2O – SiO2 System

Lavrov,

Kuvardin,

Narmatov

2024

jour

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The purpose of this work was to continue research on the activation of quartz raw materials using alkali metal hydroxides. This paper presents a theoretical justification and practical confirmation of the physical and chemical activation of quartz raw materials by sodium hydroxide, taking into account the eutectic ratios in the Na2O–SiO2 system.Methods. Quartz glass sand VS-030-B was chosen as a source of quartz raw materials; as a sodium-containing raw material flake sodium hydroxide brand TR. For the scientific basis, the phase diagram of Na2O-SiO2 of Berezhny was used. To study the phase composition of activated quartz sand, X-ray phase analysis was used; to study a particle of the activation product of quartz sand and sodium hydroxide, scanning electron microscopy was used. To confirm the effectiveness of the developed method, comparative pulping of sodium vitreous silicate was carried out according to the proposed method and previously known ones.Results. A method has been developed for activating quartz raw materials with sodium hydroxide to obtain vitreous sodium silicates using a mixture of two activation products, to obtain one of which parts of quartz raw materials and sodium hydroxide are taken in an eutectic ratio, and to obtain another activation product, the remainder of quartz raw materials and the calculated minimum the amount of sodium hydroxide required to obtain a shell on a quartz grain.Conclusion. Based on the results of comparative experimental cooking of tableted mixtures for silicate lumps using the developed method for activating quartz raw materials and using a mixture of quartz sand and sodium carbonate, the efficiency of the developed method, expressed in reducing the cooking temperature, is experimentally affected. The results of the study were issued in the form of a patent of the Russian Federation No. 2714415 "Method of preparing a charge for alkaline silicate glass".

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Section: Introductionunclassified

Physical and Chemical Activation of Quartz Raw Materials with Sodium Hydroxide in the Ratio of the Eutectic Composition in the Na2O – SiO2 System

Lavrov,

Kuvardin,

Narmatov

2024

jour

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“…Even though these chemical methods could determine if a given glass is homogeneous, the lowest spatial scale is limited by the laser spot size, generally of several microns. Consequently, some alternative methods 10–15 have arisen; among them, the one proposed by Souza et al 12 is particularly interesting as it enables the quantification of chemical homogeneity of glasses and the associated scale in a practical way. This is accomplished indirectly by a statistical analysis of the spatial crystal distribution in partially crystallized glasses.…”

Section: Introductionmentioning

confidence: 99%

Assessing glass‐ceramic homogeneity and nucleation self‐correlation by crystallization statistics

et al. 2021

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In this work, we implemented and tested a statistical method to evaluate the microstructural uniformity of partially crystallized glasses employing the aggregation index (R‐index), a parameter derived from the Poisson distribution function, which has mainly been used in Ecology studies. Since the crystal nucleation rate strongly depends on the chemical composition, the spatial crystal distribution in glass‐ceramics can be used to infer their chemical homogeneity. We also tested the hypothesis, advanced by some authors, of preferential secondary nucleation close to preexisting crystals (even in chemically homogeneous samples). To this end, we conducted a nearest‐neighbor statistical analysis of the spatial crystal distribution in partially crystallized Li2Si2O5 and Ba5Si8O21 glasses, used as model materials, by inspecting optical micrographs obtained at different magnifications. The resultant R‐indexes indicate a very high degree of homogeneity of the crystal number distribution, reflecting the uniform distribution of the chemical elements in the parent glasses. Moreover, the results for both glasses refute the suggestion that crystal nucleation is self‐correlated. These outcomes allow us to suggest the R‐index as a valuable and easily implemented tool to evaluate the chemical homogeneity of glasses that undergo internal nucleation, such as those used for glass‐ceramics.

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“…After granulating, either during storage or transporting to the glass tank, dusting of the glass batch ingredients or loss of homogeneity (segregation) in the materials would be overcame, this is because glass batch after compacting have high strength and firmly structure [7]. Granulated glass batch can accelerate melting rate due to the finely dispersed, increased homogeneity and close contact of components of glass batch after granulating [8].…”

Section: Introductionmentioning

confidence: 99%