scholarly journals Lead recovery and the feasibility of foam glass production from funnel glass of dismantled cathode ray tube through pyrovacuum process

2009 ◽  
Vol 161 (2-3) ◽  
pp. 1109-1113 ◽  
Author(s):  
Mengjun Chen ◽  
Fu-Shen Zhang ◽  
Jianxin Zhu
Keyword(s):  
Foam Glass ◽  
Glass Production ◽  
Lead Recovery ◽  
Cathode Ray Tube

scholarly journals Chemical–Electrochemical Process Concept for Lead Recovery from Waste Cathode Ray Tube Glass

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1546
Author(s):  
Árpád Imre-Lucaci ◽  
Melinda Fogarasi ◽  
Florica Imre-Lucaci ◽  
Szabolcs Fogarasi
Keyword(s):  
Flow Rate ◽  
Current Density ◽  
Complete Recovery ◽  
Electrochemical Process ◽  
Operating Conditions ◽  
General Effect ◽  
Optimal Operating ◽  
Recirculation Flow ◽  
Lead Recovery ◽  
Cathode Ray Tube

This paper presents a novel approach for the recovery of lead from waste cathode-ray tube (CRT) glass by applying a combined chemical-electrochemical process which allows the simultaneous recovery of Pb from waste CRT glass and electrochemical regeneration of the leaching agent. The optimal operating conditions were identified based on the influence of leaching agent concentration, recirculation flow rate and current density on the main technical performance indicators. The experimental results demonstrate that the process is the most efficient at 0.6 M acetic acid concentration, flow rate of 45 mL/min and current density of 4 mA/cm2. The mass balance data corresponding to the recycling of 10 kg/h waste CRT glass in the identified optimal operating conditions was used for the environmental assessment of the process. The General Effect Indices (GEIs), obtained through the Biwer Heinzle method for the input and output streams of the process, indicate that the developed recovery process not only achieve a complete recovery of lead but it is eco-friendly as well.

scholarly journals Evaluation of Physical Properties of a Metakaolin-Based Alkali-Activated Binder Containing Waste Foam Glass

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5458
Author(s):  
Petra Mácová ◽  
Konstantinos Sotiriadis ◽  
Zuzana Slížková ◽  
Petr Šašek ◽  
Michal Řehoř ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Foam Glass ◽  
Glass Production ◽  
Alkali Activation ◽  
Activation Process ◽  
X Ray ◽  
Thermal Insulating ◽  
The Matrix ◽  
Alkali Activated

Foam glass production process redounds to large quantities of waste that, if not recycled, are stockpiled in the environment. In this work, increasing amounts of waste foam glass were used to produce metakaolin-based alkali-activated composites. Phase composition and morphology were investigated by means of X-ray powder diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy. Subsequently, the physical properties of the materials (density, porosity, thermal conductivity and mechanical strength) were determined. The analysis showed that waste foam glass functioned as an aggregate, introducing irregular voids in the matrix. The obtained composites were largely porous (>45%), with a thermal conductivity coefficient similar to that of timber (<0.2 W/m∙K). Optimum compressive strength was achieved for 10% incorporation of the waste by weight in the binder. The resulting mechanical properties suggest the suitability of the produced materials for use in thermal insulating applications where high load-bearing capacities are not required. Mechanical or chemical treatment of the waste is recommended for further exploitation of its potential in participating in the alkali activation process.

Resource-Saving Technologies in the Thermal Insulation-Structural Foam Glass Production

2019 ◽  
Vol 974 ◽  
pp. 356-361
Author(s):  
O.V. Kuznetsova ◽  
N.D. Yatsenko ◽  
A.I. Subbotin ◽  
M.Yu. Klimenko
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Foam Glass ◽  
Scientific Research ◽  
Glass Production ◽  
Environmental Safety ◽  
Resource Saving ◽  
Structural Foam ◽  
Safety Requirements ◽  
Research Areas

The modern building materials market places high demands on heat-insulating and heat-insulating structural materials. In this connection, the issues of developing high-quality building materials obtained on the resource-saving technologies basis allowing to solve two interrelated problems are topical. The first problem is the industrial waste generated and existing stocks disposal. The second is associated with a decrease in the traditional raw materials deficit [1]. These problems solution, combining rational technological solutions, is based on the scientific research achievements in this area, in particular in the foam glass production. The priority scientific research areas in the foam glass materials production are the developments related to the study, the new raw materials use and the production of foam glass mixture compositions on their basis, which provide, along with the necessary performance properties, high environmental safety requirements [2, 3].

scholarly journals Foam Glass Production from Waste Glass by Compression

2017 ◽  
Vol 262 ◽  
pp. 012008
Author(s):  
D D Khamidulina ◽  
S A Nekrasova ◽  
K M Voronin
Keyword(s):  
Foam Glass ◽  
Glass Production ◽  
Waste Glass

scholarly journals Filter Medias from Granulated Foam-glass, Properties Investigated for Water Treatment Possibilities

2017 ◽  
Vol 9 (4) ◽  
pp. 419-423 ◽  
Author(s):  
Ramunė Žurauskienė ◽  
Marina Valentukevičienė ◽  
Raminta Žurauskaitė
Keyword(s):  
Raw Materials ◽  
Foam Glass ◽  
Glass Production ◽  
Mineralogical Composition ◽  
Space Structure ◽  
Wall Material ◽  
Water Cleaning ◽  
Porous Granule ◽  
Granule Surface ◽  
Granule Properties

Inorganic material – granulated foam-glass produced from glass breakage in small porous granule shape. Foam-glass is gotten by connecting thoroughly grounded glass with foamers, later this composition is heated in the furnace in especially high temperature and is turned into various diameter greyish granules. Granulated foam-glass is a unique ecological material of which inner structure pores are arranged in such a way that air is trapped inside. Foam-glass production technology is one of the most advanced since the product is made from secondary raw materials, not leaving any third row waste. From granule surface images it can be seen that granule surface has pores and voids, some of these pores are closed, others are connected with granule’s inner pores, all pore walls are smooth, and the wall material is vitrified. Pores and voids are arranged chaotically in smaller granules, bigger granules inner space structure is tidy, bigger part is occupied by correctly arranged bigger pores and space between them is filled with smaller pores. Granules are composed of amorphous phase, in mineralogical composition can emit one material cristobalite. In the work were researched two fraction granules: 0/2 and 2/4 as well as determined 0/4 fraction granular-metric composition. Researched and determined main physical granule properties and properties related to water effect to the material, shown in micro-structural granule surface and inner structure images. According to explored properties it can be noted that granules can be adapted in water cleaning technologies.

scholarly journals Nature Conservation Technology for Producing Slag-Foam Glass as a Structural and Thermal Insulating Material

2018 ◽  
Vol 41 ◽  
pp. 02017 ◽  
Author(s):  
Natalia Gilyazidinova ◽  
Nadezhda Rudkovskaya ◽  
Tatiana Santalova
Keyword(s):  
Foam Glass ◽  
Glass Production ◽  
Average Density ◽  
Liquid Sodium ◽  
Insulation Material ◽  
Thermal Insulating ◽  
Soluble Glass ◽  
Ferroalloy Plant ◽  
Conservation Technology ◽  
Sodium Glass

The purpose of the research is to determine the starting material composition, the conditions for its heat treatment and operation, and also the development of the recommendations on the technology of manufacturing and use of slag-foam glass as a structural and thermal insulation material for low-rise construction. Research and development of the composition and technology of ferrosilicate dust - a secondary product of the Novokuznetsk ferroalloy plant and Kemerovo chemical enterprises - slag-foam glass production, were carried out taking intoaccount the need for recycling of waste generated during the production process. The liquid sodium glass production waste is a mixture offerrosilicate dust that is not completely exhausted in the reactors and anaqueous Na2OSiO2 solution. Its density varies from 1.2 g/cm3 to 1.5 g/cm3, and the binding properties are extremely unstable, they depend on the soluble glass and water ratio in the waste. The use of this material as the basis for the production of structural and thermal insulating slag-foamglass with the stable strength index, the average density and the long-term durability is quite relevant.

Lead recovery from scrap cathode ray tube funnel glass by hydrothermal sulphidisation

2015 ◽  
Vol 33 (10) ◽  
pp. 930-936 ◽  
Author(s):  
Wenyi Yuan ◽  
Wen Meng ◽  
Jinhui Li ◽  
Chenglong Zhang ◽  
Qingbin Song ◽  
...  
Keyword(s):  
Lead Recovery ◽  
Cathode Ray Tube

Modeling of Macro-Physical Parameters of Foam Glass under Exposure of Cyclic Thermal Effects

2019 ◽  
Vol 974 ◽  
pp. 464-470 ◽  
Author(s):  
S.V. Fedosov ◽  
M.O. Bakanov ◽  
S.N. Nikishov
Keyword(s):  
Heat Treatment ◽  
Raw Materials ◽  
Foam Glass ◽  
Glass Production ◽  
Raw Material ◽  
Temperature Fields ◽  
Material Surface ◽  
Heating Process ◽  
Physical Parameters ◽  
Entire Volume

The process of the raw materials mixture heat treatment in the foam glass production is of great importance in the formation of the finished product thermal characteristics. Selection of optimal temperature regimes at the stages when the process of glass particles melting is activated and thermal decomposition of the gasifier occurs is of particular importance. Otherwise, a situation when the gasifier has decomposed by mass on the layers close to the material surface at that the reaction has not been initiated at the raw materials mixture center may emerge. The problem can be solved by the uniform heating throughout the raw materials mixture entire volume. The fact that excessive heating can entail additional financial costs for manufacturers’ energy resources and as a result the cost of the material can be increased and affect its competitiveness among thermal insulation materials should be taken into account. A method for calculating temperature fields allowing to simulate the thermophysical heating process in the center of the material under study on the basis of its surface temperature indicators has been presented in the paper. Such an approach may make calculation of the rational time intervals for the raw material mixture heat treatment prior to the foaming stages and partially optimization of the production process possible.

Analysis of the Environmental Impact of Foam Glass

2016 ◽  
Vol 847 ◽  
pp. 315-320
Author(s):  
Li Juan Zhang ◽  
Xian Zheng Gong ◽  
Ying Liang Tian ◽  
Zhi Hong Wang ◽  
Feng Gao ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Foam Glass ◽  
Glass Production ◽  
Weight Coefficient ◽  
Green Energy ◽  
Raw Material ◽  
Equal Weight ◽  
Environment Impact ◽  
Main Contributor ◽  
Single Indicator

Foam glass was widely used as a green energy saving material with good performances of light, thermal insulation and sound absorption. Using waste glass as raw material for foam glass production, can not only turn waste into treasure and reduce resource consumption, but also protect the environment. In this article, the foam glass which produced in Jiaxing, China was studied based on the method of life cycle assessment (LCA), and the resources, the energy consumption and the emission of pollutants at the same time were evaluated. The results show that the characterization value of GWP is the largest. The foaming stage is the main contributor which accounts for 79.7%. Similarly, the foaming stage is the major contributor to AP, POCP, EP and HTP .The characterization value of ADP is the smallest. The foaming stage and annealing stage is the main contributor to ADP which account for 43.0%, 49.7% respectively. It has been found that the foaming stage makes the most contribution to the environmental impact. AP, GWP, POCP and EP of the foaming stage are extremely prominent compared to other stages. The authors used the methods of equal weight coefficient and AHP to weight the single indicator. The results show that the environment impact caused by the foaming stage is the largest, then grinding stage and cutting stage follow behind. The environment impact caused by the transportation stage is the smallest.

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