scholarly journals Structure Formation Processes and Green Ceramics Manufacturing from Hazardous Bauxite Red Mud and Ferrous Slag

2021 ◽  
Author(s):  
Vsevolod Mymrin ◽  
Kirill Alekseev ◽  
Walderson Klitzke ◽  
Monica A. Avanci ◽  
Paulo H.B. Rolim ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Structure Formation ◽  
Red Mud ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Linear Shrinkage ◽  
Industrial Wastes ◽  
Raw Material ◽  
Material Base ◽  
Traditional Natural

Abstract This paper reports the development and characterization of some new ceramic materials from hazardous bauxite red mud (50 to 100 wt.%) and blast furnace slag (10 and 50%). This research aimed to demonstrate the possibility of expanding the raw material base for ceramics production, completely replacing the traditional natural raw materials (clay and sand) by hazardous industrial wastes composites with increasing local and global sustainability. Studies on the physicochemical processes of the ceramic structure’s formation were conducted by the XRF, XRD, AAS, SEM with EDS, and LAMMA methods. Changes in flexural strength, linear shrinkage, water absorption, and density were determined during the sintering process at 1000°, 1050°, 1100°, 1150°, 1200°, and 1225°C. The ceramics` flexural strength after sintering at 1225°C reached 19.78 MPa due to the syntheses of the mainly glass-like structure formation, confirmed by SEM, EDS and isotopes LAMMA methods with the complete binding of the heavy metals.

scholarly journals Physical and Chemical Fundamentals and Technical Solutions for Recovery of Non-ferrous and Rare Metals from Industrial Wastes

2020 ◽  
Author(s):  
P.A. Kozlov ◽  
A.M. Panshin ◽  
L.I. Leontiev
Keyword(s):  
Russian Federation ◽  
Raw Materials ◽  
Block Diagram ◽  
Industrial Wastes ◽  
Raw Material ◽  
Material Base ◽  
Waelz Process ◽  
Zinc Cadmium ◽  
The Russian Federation ◽  
Increasing Demand

The increasing demand for zinc and a range of zinc-related metals (for example: lead; indium; tin; cadmium; and copper) in the Russian Federation cannot be satisfied by the existing production plants due to the lack of raw materials. At the same time, ferrous and non-ferrous metallurgy and the chemical industry have accumulated hundreds of millions of tons of zinc wastes (falling into the hazard categories 2 to 4), the processing of which could not only make up the raw material base, but also improve the environmental situation. In the world, over 85% of ferrous dust is recycled using the Waelz process. The Waeltz process is used for distilling separation of elements under reducing conditions. In this study, a block diagram for production of the following elements from industrial wastes is proposed: zinc, cadmium and indium in form of massive metals; zinc and indium in the form of fine powders; and clinker as a raw material for cement production. The technical and scientific details of this new process have been patented in the Russian Federation and abroad. For the first time, the following operations have been implemented with the use of large-sized Waelz kilns: vapour-oxidized Waeltz treatment of polymetallic wastes; recycling of heat from gases and solid products with generation of process fumes; and implementation of alternative flux (dolomite) and alternative fuel (petroleum coke). Keywords: Waelz process, industrial wastes, heat recycling, vapour-oxidized Waelz processing

Ceramic Composition Material with Mullite Crystals Obtained from the Clayy Raw Material of Yakutia

2020 ◽  
Vol 992 ◽  
pp. 253-258
Author(s):  
M.P. Lebedev ◽  
V.N. Tagrov ◽  
E.S. Lukin
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Practical Interest ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Strength Properties ◽  
Raw Material ◽  
Composition Material ◽  
Material Base ◽  
Wide Range

The article deals with the manufacture of modern structural ceramic materials from clay and loam deposits of the Republic of Sakha (Yakutia). The importance and relevance of the development of the production of building materials from local raw materials is emphasized, since this will certainly affect the effectiveness of the construction complex as a whole. The successful development of the construction complex is capable of not only stimulating growth in all sectors of the economy, but also contributes to solving the most pressing social problems. Today, Yakutia has huge reserves of mineral raw materials for the production of a wide range of building materials and products. Of practical interest are wall materials made from clay soils. Given the features of the region’s raw material base, this work focuses on additional processing of traditional material. Controlling the complex physicochemical and structural-mechanical transformations that occur during heat treatment, a methodology has been developed for creating a composite material that will allow competitive innovative materials with enhanced strength properties to be produced with a reinforcing element with a glassy phase matrix of mullite crystals. The fabricated samples have a wide range of physical and mechanical properties and allow using it as a high-quality structural building ceramics, as well as industrial floor technical tile.

Preparation of Self-Releasing Glaze Ceramic Materials Utilizing Red Mud

2011 ◽  
Vol 383-390 ◽  
pp. 3366-3373
Author(s):  
Shuo Qin ◽  
Bo Lin Wu ◽  
Shiao Zhao ◽  
Cong Chang Ma ◽  
Zu Sheng Hu
Keyword(s):  
Mechanical Properties ◽  
Red Mud ◽  
Barium Carbonate ◽  
Raw Materials ◽  
Normal Pressure ◽  
Ceramic Materials ◽  
The Self ◽  
Raw Material ◽  
Radiation Level ◽  
Red Sandstone

Red mud is the main solid residue generated during the production of alumina by means of the Bayer process. In order to expand the comprehensive utilization field of red mud and develop new ceramic products with low radioactivity utilizing red mud, the exploration of preparing self-releasing glaze ceramic materials using red mud as raw material was carried out. During the exploration, the self-releasing glaze ceramic materials with low radiation level were produced by normal pressure sintering process using the main ingredients of red mud, red sandstone, barium carbonate and ball clay. The properties of the self-releasing glaze ceramic samples were investigated by the measurements of mechanical properties, X-ray diffraction (XRD), scanning electron microscopy (SEM) and radiation measurement. The results show that the self-releasing glaze ceramic materials have good mechanical properties (the bulk density, 3.10 g/cm3; the compressive strength, 78.00 MPa). Adding barium carbonate to the raw materials and then calcine them to ceramics, which can extend the sintering temperature range and the radioactivity level of the self-releasing glaze ceramic materials can be reduced to that of the natural radioactive background of Guilin Area, Karst landform (the average 60 Total/Timer).

scholarly journals THE USE OF WASTE MINERAL WOOL IN THE PRODUCTION OF CERAMIC WALL MATERIALS

2019 ◽  
Vol 10 (3) ◽  
pp. 53-60
Author(s):  
V. Z Abdrakhimov
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Mineral Wool ◽  
Raw Material ◽  
Material Base ◽  
Fusible Clay ◽  
Environmental Situation ◽  
Wall Materials

The environmental situation in Russia is characterized by a high level of anthropogenic impact on the environment, significant environmental consequences of past economic activity. Their disposal and storage costs 8-10 % of the cost of products, so the disposal of such waste is of paramount importance.Due to the involvement of multi-tonnage waste in the production of ceramic materials of mass consumption, which include wall materials, it is possible to radically change the parameters of the raw material base of Russia, which also helps to reduce environmental tensions in the regions. The reduction of reserves of traditional natural raw materials makes us look for new ways to replace it with different types of waste. The experience of advanced foreign countries has shown the technical feasibility of this area and the use of more as a tool to protect the environment from pollution. However, almost all basic building materials can be made from waste or from waste in combination with natural raw materials. On the basis of fusible clay and waste basalt-gabbro-norite charge, which is formed in the production of mineral wool obtained ceramic brick with high physical and mechanical properties, brick grade M150 and above. The absolute advantage of the use of multi-tonnage waste is the unloading of the environmental situation, which contributes to the solution of industrial waste disposal and environmental protection. Innovative proposals for the use of waste from the production of mineral wool in the production of wall materials - ceramic bricks based on fusible clay, the novelty of which is confirmed by patents of the Russian Federation.

scholarly journals Specific utilization methods of high-melting wastes from the enterprises of chemistry and non-ferrous metallurgy

2018 ◽  
Vol 196 ◽  
pp. 04010
Author(s):  
Aleksey Khlystov ◽  
Vladimir Shirokov ◽  
Elena Vlasova
Keyword(s):  
Ferrous Metallurgy ◽  
Industrial Waste ◽  
Raw Materials ◽  
Industrial Wastes ◽  
Raw Material ◽  
Phosphate Binders ◽  
Material Base ◽  
High Melting ◽  
Heat Resistant ◽  
Technogenic Wastes

The article provides information on industrial waste generation at enterprises of the Samara region, suitable for use as raw materials components of such heat-resistant composites as solutions, concretes, gun mixes, coatings. The research indicates rational ways of some heat-resistant binders application for utilization of mineral high-melting and heat-resistant industrial wastes. It proves that the enrichment of certain types of industrial waste, i.e. bringing the chemical composition of their components to the required state, allowed to expand the raw material base for the synthesis of heat-resistant binders and concrete in general. The use of sludge waste in the processes of synthesizing liquid phosphate binders allowed to obtain such effective binders as aluminophosphates and aluminocalciumphosphates. The research proves that application of technogenic wastes of non-ferrous metallurgy enterprises allows to receive heat-resistant materials solutions, concretes, coatings, gun mixes which characteristics are similar to their industrial analogues.

USE OF ALUMINUM-CONTAINING NANOTECHNOGENIC RAW MATERIALS AND CARBON WASTE IN THE PRODUCTION OF HEAT-RESISTANT CONCRETE

2021 ◽  
Vol 93 (1) ◽  
pp. 96-105
Author(s):  
B.Z. ABDRAKHIMOV ◽  
◽  
E.S. ABDRAKHIMOVA ◽  
Keyword(s):  
Chemical Industry ◽  
Building Materials ◽  
Raw Materials ◽  
Experimental Studies ◽  
Industrial Wastes ◽  
Raw Material ◽  
Phosphate Binders ◽  
Radius Of Curvature ◽  
Material Base ◽  
Heat Resistant

In this work, using waste from the chemical industry — aluminum-containing nanotechnogenic raw materials and a fuel and energy complex — coal enrichment based on phosphate binders, heat-resistant concrete with high physical and mechanical properties is obtained. Thanks to the use of orthophosphoric acid as a binder, it was possible to utilize 80-90% of chemical industry waste and coal preparation, which helps to reduce the anthropogenic load on the environment and humans. Studies show that as the grain size decreases, the total size of the interface is increased, the average radius of curvature of the convex sections decreases, their excess surface energy grows, and the distances between the sources and absorbers of vacancies in the system decrease. Experimental studies and rich practical experience in ceramic industries confirm the crucial role of the degree of grinding (or the use of nanoscale raw materials). Due to the action of this factor alone, it is possible in some cases to reduce the required sintering temperature by 50-100 °C or more. The use of industrial wastes in the production of building materials contributes to: a) the utilization of industrial wastes; b) environmental protection; b) the expansion of the raw material base for heat-resistant concrete based on phosphate binders.

scholarly journals THE POSSIBILITY OF USING CLAYS OF THE SAZDINSKY DEPOSIT IN THE PRODUCTION OF CERAMIC BRICK

2020 ◽  
Vol 5 (8) ◽  
pp. 87-95
Author(s):  
N. Shakurova ◽  
E. Doroganov ◽  
V. Bedina ◽  
Yu. Trepalina ◽  
O. Dobrinskaya ◽  
...  
Keyword(s):  
Phase Composition ◽  
High Efficiency ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Ceramic Materials ◽  
Raw Material ◽  
Material Base ◽  
Clay Deposits ◽  
Different Temperatures ◽  
Chemical And Mineralogical Composition

Ceramic bricks is one of the most popular architectural finishing and structural materials. It has high efficiency and decorative properties. Expanding the raw material base of clay deposits in the production of ceramic bricks is an urgent task. In order to assess the possibility of using clays from the Sazdinsky Deposit (Aktobe region) in the production of ceramic bricks. Studies are conducted on four sections of clays from this deposit. The chemical and mineralogical composition of clays is studied, and the rational composition of raw materials is calculated. It is revealed that the studied clays have a polymineral composition, the main rock-forming minerals are kaolinite, illite and montmorillonite. According to the classification of A. I. Augustinik, the technological purposes of the studied clays are evaluated. The phase composition of samples heat-treated at different temperatures is studied. Based on the data of chemical and mineralogical composition of raw materials, technological properties of clays, physical-mechanical and operational indicators, it is established that the clays of three sites are suitable for the production of ceramic bricks by plastic molding. Phase composition of the obtained ceramic materials based on clays of four sites at a firing temperature of 1050 ° C are represented by quartz, hematite, anorthite, mullite, hematite and cristobalite. The strength of the fired samples of all clays corresponds to the brand 150-200. It is found that a more frost-resistant brick is obtained from the clays of the second section.

scholarly journals Implementation of Contact-Condensation Hardening Theory Mechanisms when Forming Building Composites

2020 ◽  
Vol 24 (1) ◽  
pp. 90-102
Author(s):  
M. P. Stepanova ◽  
O. A. Sotnikova
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Structure Formation ◽  
Building Materials ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Resource Saving ◽  
The Impact ◽  
Contact Condensation

Purpose of research is to study cheaper composite materials for building structures such as cement-free ones without heat treatment, which will undoubtedly allow finding their application in building industry. To achieve this goal it is necessary to identify patterns of structure formation of clinker-free contact condensation hardening composite materials in which portlandite crystals act as a matrix, and the physicochemical active component of natural origin acts as a filler.Methods. In accordance with the purpose set, one of the main tasks of the work was to be solved; it involved study-ing the patterns of structure formation of contact-condensation hardening systems relying on the basic principles of materials science, which include studying the influence of the composition, structure and state of the starting com-ponents on the properties of a composite material. In this work, we studied the role of the physicochemical activity of raw materials and the possibility of ‘combining’ a portlandite matrix with filling mechano-physicochemical active raw materials capable of producing new structures. To form the composite material, a compaction pressing technique at elevated specific pressures was used, which made it possible to implement the mechanisms of contact condensation technology of structure formation. The formation of physicochemical bonds of portlandite and aluminosilicate filler of various types is also possible with certain ratios of their mass fractions and V/I ratios the optimization of which was one of our objectives.Results. The result of this work is to assess the impact of raw material characteristics and technology parameters on the properties of the resulting material, namely, the improvement of the compacting pressure and the amount of filler when getting a compacted composite.Conclusion. The development of a technology of producing clinker-free contact condensation composites based on portlandite with aluminosilicate filler will expand the raw material base of local building materials, reduce their cost and energy consumption, that is, solve key issues of resource saving in the building materials production.

scholarly journals STUDY OF ARTIFICIAL CERAMIC BINDERS BASED ON SILICATE MATERIALS FOR CERAMICS INDUSTRY

2020 ◽  
pp. 11-16
Author(s):  
V. Doroganov ◽  
E. Neverova ◽  
S. Stankovich
Keyword(s):  
Raw Materials ◽  
Import Substitution ◽  
Ceramic Materials ◽  
Economic Feasibility ◽  
Raw Material ◽  
Material Base ◽  
Use Of Technology ◽  
Technological Quality ◽  
Ceramics Industry

this article discusses the possibility of using artificial ceramic binders obtained by the technology of highly concentrated binder suspensions in the production of ceramic materials and products. The results of complex studies of suspensions of artificial ceramic binders based on feldspar and quartz sand, as well as the results of tests of the samples obtained on their basis are presented. A definite advantage of entering the suspensions in the molding compositions of the slurries used in the manufacture of certain varieties of pottery is proved. The solution of the problem of import substitution of raw materials components, caused mainly by the difficult political situation in the country, as well as the lack of its own raw material base of good quality, in connection with which the paper proposes the use of technology of highly concentrated binder suspensions, which allows to optimize the quality of domestic raw materials. The use of technology of highly concentrated binder suspensions, allows not only to expand the assortment and range of products produced by this technology, but also to improve the quality and economic feasibility of individual varieties of ceramics. The emphasis on the introduction of technology of highly concentrated binding suspensions in certain areas of ceramics production is explained by the formation of a completely different structure of materials due to the increased content of nanoparticles in the composition of artificial ceramic binding suspensions, which contributes to a significant increase in mechanical strength while optimizing other basic technological quality indicators for ceramic materials and products. The possibility of reducing the firing temperature by 50-100°C, however, this issue requires additional research.

WASTE RECYCLING ENERGY AND NON-FERROUS METALS IN THE PRODUCTION OF CERAMIC BRICKS CONTRIBUTES TO THE ECOLOGICAL SAFETY OF THE BIOSPHERE

2019 ◽  
pp. 71-80
Author(s):  
Abdrakhimov
Keyword(s):  
Russian Federation ◽  
Building Materials ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Waste Recycling ◽  
Mineral Wool ◽  
Raw Material ◽  
Material Base ◽  
The Russian Federation

Environmental security is currently one of the main components of the national security of the Russian Federation and includes not only control over the state of the environment, but also the implementation of measures to prevent the occurrence of environmental crises and disasters. The reduction of reserves of tradi-tional natural raw materials makes us look for new ways to replace it with different types of waste. The expe-rience of advanced foreign countries has shown the technical feasibility of this area and the use of more as a tool to protect the environment from pollution. However, almost all basic building materials can be made from waste or from waste in combination with natural raw materials. Due to the involvement of multi-tonnage waste in the production of ceramic materials of mass consumption, which include ceramic bricks, it is possi-ble to radically change the parameters of the raw material base of Russia, which also helps to reduce envi-ronmental tensions in the regions. Production of ceramic bricks  one of the most material-intensive sectors of the economy, so the rational use of fuel, raw materials and other material resources is a decisive factor in its successful development in the context of economic reform. In this regard, the use of waste in ceramic mate-rials is of particular relevance. On the basis of beidellite clay, waste: energy ─ ash and slag material and non-ferrous metallurgy ─ sludge Nickel-skeletal catalyst obtained ceramic brick with high physical and mechanical properties. Innova-tive proposals for the use of waste from the production of mineral wool in the production of wall materials – ceramic bricks based on fusible clay, the novelty of which is confirmed by a patent of the Russian Federation.

Sign in / Sign up

Export Citation Format

Share Document