Manufacture of Ceramic High-Porosity Cellular Materials Based on Raw Materials and Production Wastes in Uzbekistan

2015 ◽  
Vol 72 (1-2) ◽  
pp. 35-37
Author(s):  
M. Kh. Rumi ◽  
G. V. Voronov ◽  
M. A. Zufarov ◽  
N. A. Kulagina ◽  
É. P. Mansurova ◽  
...  
Keyword(s):  
Raw Materials ◽  
Cellular Materials ◽  
High Porosity ◽  
Production Wastes

RHEOLOGICAL PROPERTIES OF CERAMIC MASSES: IMPROVEMENT BY COMPLEX MATERIAL ACTIVATION

2019 ◽  
Vol 16 (3) ◽  
pp. 334-351
Author(s):  
A. S. Mavlyanov ◽  
E. K. Sardarbekova
Keyword(s):  
Rheological Properties ◽  
Raw Materials ◽  
Sensitivity Coefficient ◽  
Raw Material ◽  
Clay Material ◽  
Fibrous Materials ◽  
Chemical Production ◽  
Production Wastes ◽  
Pass Through ◽  
The Masses

Introduction. The objective of the research is to study the effect of the complex activation of the alumina raw material on the rheological properties of the ceramic mass. In addition, the authors investigate solutions for the application of optimal coagulation structures based on loams and ash together with plastic certificates.Materials and methods. The authors used the local forest like reserves of clay loams at the BashKarasu, ash fields of the Bishkek Central Heating Centre (BTEC) and plasticizer (sodium naphthenate obtained from alkaline chemical production wastes) as fibrous materials. Moreover, the authors defined technological properties of raw materials within standard laboratory methodology in accordance with current GOSTs.Results. The researchers tested plastic durability on variously prepared masses for the choice of optimal structures. The paper demonstrated the plastic durability of complexly activated compounds comparing with non-activated and mechanically activated compounds. The sensitivity coefficient increased the amount of clay loams by mechanically and complexly activated, which predetermined the possibility of intensifying the process of drying samples based on complexly activated masses.Discussion and conclusions. However, mechanical activation of clay material reduces the period of relaxation and increases the elasticity coefficient of ceramic masses by 1.8–3.4 times, meanwhile decreases elasticity, viscosity and the conventional power during molding, which generally worsens the molding properties of the masses. Сomplex activation of ash-clay material decreases the period of relaxation and provides an increase in elasticity, plasticity of ceramic masses by 46–47%, reduction in viscosity by 1.5–2 times, conventional power on molding by 37–122% in comparison with MA clay loams. Ceramic masses based on spacecraft alumina raw materials belong to the SMT with improved rheological properties; products based on them pass through the mouthpiece for 5–7 seconds.

scholarly journals MFC/NFC-Based Foam/Aerogel for Production of Porous Materials: Preparation, Properties and Applications

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5568
Author(s):  
Chenni Qin ◽  
Mingzhu Yao ◽  
Yang Liu ◽  
Yujie Yang ◽  
Yifeng Zong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Porous Materials ◽  
Raw Materials ◽  
Sewage Treatment ◽  
Nanofibrillated Cellulose ◽  
High Specific Surface Area ◽  
High Porosity ◽  
Retention Performance ◽  
Plant Fibers ◽  
Technical Problems

Nanofibrillated cellulose and microfibrillated cellulose are potential raw materials separated from plant fibers with a high aspect ratio and excellent mechanical properties, which can be applied in various fields (packaging, medicine, etc.). They have unique advantages in the preparation of aerogels and foams, and have attracted widespread attention in recent years. Cellulose-based porous materials have good biodegradability and biocompatibility, while high porosity and high specific surface area endow them with strong mechanical properties and liquid retention performance, which can be used in wall construction, sewage treatment and other fields. At present, the preparation method of this material has been widely reported, however, due to various process problems, the actual production has not been realized. In this paper, we summarize the existing technical problems and main solutions; in the meantime, two stable systems and several drying processes are described, and the application potential of cellulose-based porous materials in the future is described, which provides a reference for subsequent research.

Use of Industrial Waste and Raw Materials in Iron Sorption

2016 ◽  
Vol 721 ◽  
pp. 154-158
Author(s):  
Edmunds Lodins ◽  
Inga Pudze ◽  
Ineta Rozenstrauha ◽  
Linda Krage
Keyword(s):  
Industrial Waste ◽  
Iron Reduction ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Chemical Properties ◽  
High Porosity ◽  
Processing Waste ◽  
Iron Compounds ◽  
Physical Chemical ◽  
Made In

This work focuses on pellets made by Latvian industrial waste (waste cullet glass, sewage sludge, metallurgical slag and alumina scrap metal processing waste and raw mineral materials (limeless clay) to gain high porosity and water sorptiom. Iron sorption using ceramic pellets is explored more detailed. Physical-chemical properties and microstructure were researched to obtain a deeper understanding of how these qualities affect water purification from iron compounds. Three pellets with different properties were made in this paper : B5, A5 and E1. Composition B5 indicates highest iron sorption rate at sintering temperature 1100 °C and shows considerable iron reduction in a solution after one week.

Systematic Photovoltaic Waste Recycling

Green ◽  
2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Wolfram Palitzsch ◽  
Ulrich Loser
Keyword(s):  
End Of Life ◽  
Raw Materials ◽  
German Law ◽  
Waste Recycling ◽  
Major Elements ◽  
Life Strategy ◽  
Pv Systems ◽  
Use Of Resources ◽  
Production Wastes ◽  
Plastic Foil

AbstractIndium, selenium, tellurium, gallium, molybdenum, cadmium and silicon are some of the major elements used in photovoltaic cells. Fully aware of the limited availability of these metals in future, recycling has been recognized as the most advisable end-of-life strategy to save these raw materials from turning into production wastes. On the other hand, statutory measures such as “Kreislaufwirtschaftsgesetz” (the German law encouraging closed-loop economy) aim to achieve a maximum quota of recycling and a minimum use of resources such as energy and raw materials. By the year of 2050, end-of-life photovoltaic panels are anticipated to amount to 9.57 million tons [1]. Although we are not there yet, discussions on recycling have already started. We have to prepare for higher waste volumes expected in the coming years. But already today we need to solve some environmental problems like loss of conventional resources (e.g., glass) and rare metals [2]. All of the known approaches for recycling photovoltaic semiconductor material seem economically and environmentally inefficient [3, 4]. In this paper, we report about reclaiming metals from scrap of thin film systems and associated photovoltaic manufacturing wastes like sandblasting dust and overspray. We also report one universal wet-chemical treatment for reclaiming the metals from CIS, CIGS or CdTe photovoltaic waste. Further, we discuss the application of our method to new PV systems, such as substrates other than glass (stainless steel, aluminum or plastic foil sheets) and alternative semiconductor alloys such as GaAs.

Promising applications of high-porosity cellular materials in heat pipes

1990 ◽  
Vol 58 (1) ◽  
pp. 57-61
Author(s):  
V. M. Kiseev ◽  
A. I. Rabinovich ◽  
N. P. Pogorelov ◽  
A. A. Belyaev ◽  
A. P. Kunevich ◽  
...  
Keyword(s):  
Heat Pipes ◽  
Cellular Materials ◽  
High Porosity

Acoustic characteristics of high-porosity permeable cellular materials

1986 ◽  
Vol 25 (11) ◽  
pp. 891-893 ◽  
Author(s):  
S. V. Belov ◽  
V. N. Antsiferov ◽  
A. S. Terekhin ◽  
S. K. Balantsev ◽  
A. M. Beklemyshev ◽  
...  
Keyword(s):  
Cellular Materials ◽  
High Porosity ◽  
Acoustic Characteristics

scholarly journals The Using of Technogenic Waste from Ferroalloy Production

2020 ◽  
Author(s):  
Vladimir Ivanovich Zhuchkov ◽  
Alexandr Vladimirovich Sychev ◽  
Oleg Vadi- movich Zayakin ◽  
Leopold Igorevich Leontiev
Keyword(s):  
Blast Furnace ◽  
Waste Disposal ◽  
Raw Materials ◽  
Ferroalloy Production ◽  
Partial Recovery ◽  
Auxiliary Equipment ◽  
Technogenic Waste ◽  
Production Wastes ◽  
Main Production ◽  
Environmental Measures

When ferroalloys are produced, a large number of coproducts are also formed: slag, riddlings of small fractions of ore raw materials and finished products (ferroalloys), sludge, dust and a number of other materials. Their use and processing allows for reduced consumption of the original minerals, thereby increasing the efficiency of the main production and reducing environmental pollution. As a result, both enterprise costs in the form of environmental payments for emissions and waste disposal, as well as government costs associated with environmental measures are reduced. However, the scale of use of ferroalloy production wastes is relatively small. The replacement of the main and auxiliary equipment with new, environmentally friendly equipment, can promote to significantly reduce or completely eliminate hazardous emissions and the generation of unclaimed production waste. It is necessary to organize the use of blast furnace gas from ore reduction furnaces for preheating and partial recovery of elements of charge materials. Keywords: waste, ferroalloy production, utilization

scholarly journals Best available technologies of wastes processing in mining and metallurgical industries

2019 ◽  
Vol 75 (7) ◽  
pp. 854-859
Author(s):  
I. V. Butorina ◽  
M. V. Butorina
Keyword(s):  
Raw Materials ◽  
Technical Information ◽  
Organic Wastes ◽  
Thermal Method ◽  
Reference Book ◽  
Modern Approach ◽  
Best Available Technologies ◽  
Production Wastes ◽  
Metallurgical Furnaces ◽  
High Level

Mining and metallurgical industries are referred to high wastes productions. To decrease the damage to environment, progressive equipment and technologies are required. It was shown, that the modern approach to the environment protection should be based on implementation best available technologies (BAT). In the elaborated industry technical information BAT reference-book for the mining and metallurgical industries recommendation presented for utilization of main technological wastes of metallurgical production. A brief review of technologies presented, implementation of which allow providing practically complete processing of non-organic wastes, arising during raw materials mining and production of them ferrous metals. To choose the methods of construction and operation wastes utilization, one should be guided by recommendations, related to the thermal sterilization technologies for organic wastes as well as recommendations for utilization of organic wastes. It was noted, that the part of BAT reference book devoted to storing and disposal of production and consumption wastes is an evidence of high level of technologies used in Russia to realize the process. It was indicated, that in the BAT reference books the foreign experience of wastes utilization was not taken into account. Besides, a possibility to sterilize the wastes by thermal method in metallurgical furnaces was not also described. As a whole the application of the information presented in the BAT reference books, will allow to guide specialists of mining and metallurgical plants to choose best available technologies of handling with production wastes.

Efficiency of mineral additives to binding component for making hardening mixtures at underground operations

2021 ◽  
Vol 77 (6) ◽  
pp. 643-650
Author(s):  
V. I. Golik ◽  
Yu. I. Razorenov ◽  
V. S. Vagin ◽  
V. I. Lyashenko
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Mineral Deposits ◽  
Electrochemical Activation ◽  
Metallurgical Production ◽  
Production Wastes ◽  
Study Results ◽  
Effective Operation ◽  
Mineral Additives ◽  
Binding Component

For effective operation of mining enterprises, including mines of ferrous metallurgy, supply of quality binding components is necessary to make hardening mixtures for packing of goave, aroused at underground development of hard mineral deposits. Results of the study of compositions based on ash-cement, nepheline, belit-aluminates and lime binding component made of mining and metallurgical production wastes presented. Application of vibro-, mechanical- and electrochemical activation methods to obtain filling mixtures from local low-quality raw materials, as well as activation of binding components were analyzed. A model to evaluate efficiency of binding additives presented. It was shown that decrease of cement consumption by addition of binding components of mineral origin requires perfection of mining processes, first of all, grinding and activation. It was proved, that additions of electric filters ash, nephelines, belit-aluminates and lime, obtained by utilization of current and old tailings to the basic binding component – portland cement – makes it possible to obtain hardening filling mixtures, having high enough strength to apply them at goave packing. Application of the study results makes it perspective for depressed mining and related enterprises to survive under conditions of the forming market.

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