Residual Coal Characterization for Addition to Red Clay Ceramics

2015 ◽  
Vol 820 ◽  
pp. 425-431
Author(s):  
Carlos Maurício Fontes Vieira ◽  
Sergio Neves Monteiro
Keyword(s):  
Large Scale ◽  
Chemical Constituents ◽  
Embodied Energy ◽  
Red Clay ◽  
Coal Characterization ◽  
Viable Solution ◽  
Clay Body ◽  
Residual Coal ◽  
Clay Ceramics ◽  
Ceramic Clay

The high temperature firing to process clay ceramics requires some kind of fuel, which is associated with cost and embodied energy of the final product. Saving in fuel by introducing substances with heating power represents both economical and energetical advantages. The incorporation of a fuel containing waste into the precursor clay body constitutes also an environmentally correct solution for the destination of the waste. A typical fuel-containing waste, generated in large scale, is the residual coal, which falls to the harbor yard during transfer from the cargo ship. This coal can no longer be embarked and is usually discarded in the environment. Its addition into ceramic clay is the most viable solution. Therefore, the objective of the present work is to characterize a residual coal in terms of its chemical constituents, heat power and granulometric distribution. The results indicate that the residual coal presents toxic compounds in amounts below the limits established by the environmental legislation. Its fine granulometry favors the addition to clay ceramics.

Characterization of Elephant Grass Ash as a Potential Clay Ceramic Addition

2014 ◽  
Vol 805 ◽  
pp. 585-590 ◽  
Author(s):  
Aline Marcia Ferreira Dias da Silva ◽  
Karla Albernaz Sales ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Electron Microscopy ◽  
Bottom Ash ◽  
Ceramic Production ◽  
Elephant Grass ◽  
Red Clay ◽  
Clay Body ◽  
Clay Ceramics ◽  
Fluxing Agent ◽  
Scanning Electron

The elephant grass (Pennicetum purpureum) is traditionally used both as fresh feedstock for cattle and, dried, as fuel for ceramic production in Campos dos Goytacazes, Brazil. In the present work the bottom ash generated after dry grass incineration in a ceramic furnace was characterized for a possible addition into red clay ceramics. The characterization comprised the ash morphology by laser microscopy, scanning electron microscopy coupled with EDS and thermal behavior by thermogravimetry as well as differential thermal analysis. These results indicated that the elephant grass ash could be added into a clay body not only as a fluxing agent but also to improve the particles compaction before firing.

Characterization of a Red Mud and a Clay Body for Ceramic Fabrication

2014 ◽  
Vol 798-799 ◽  
pp. 514-519 ◽  
Author(s):  
Michelle Pereira Babisk ◽  
Thalissa Pizetta Altoé ◽  
Henrique Junio de Oliveira Lopes ◽  
Ulisses Soares do Prado ◽  
Monica Castoldi Borlini Gadioli ◽  
...  
Keyword(s):  
Red Mud ◽  
Mineralogical Composition ◽  
Processing Plants ◽  
Clay Matrix ◽  
Clay Body ◽  
Clay Ceramics ◽  
Red Ceramics ◽  
Ceramic Clay

Red mud is a specific term applied for a residue generated during the processing of aluminum ores, mainly bauxite in the Bayer process, to produce alumina (Al2O3). In several countries where bauxite is mined and processed, distinct red muds are generated in ever growing amounts and becoming an environmental problem. This problem is also affecting the large bauxite processing plants in Brazil and a possible solution for the red mud is its addition to clay ceramics. Before an industrial scale addition is implanted, the specific red mud needs to be characterized for compatible behavior with the ceramic clay matrix. Therefore, the objective of the present work was to characterize a red mud generated in Brazil for an eventual addition to clay ceramic. This was conducted through the determination of density, chemical and mineralogical composition as well as size distribution and microscopic observation of particles. The results indicated that the specific red mud investigated is compatible with clays and has a potential for addition in common red ceramics.

Influence of Quartzite Residues on the Strength of Added Red Clay Ceramics

2014 ◽  
Vol 775-776 ◽  
pp. 541-546 ◽  
Author(s):  
Michelle Pereira Babisk ◽  
Wagner Souza Ribeiro ◽  
Mariane Costalonga de Aguiar ◽  
Veronica Scarpini Candido ◽  
Monica Castoldi Borlini Gadioli ◽  
...  
Keyword(s):  
Lower Cost ◽  
Raw Materials ◽  
Microstructural Analysis ◽  
Allotropic Transformation ◽  
Red Clay ◽  
Bend Tests ◽  
Electron Microscopes ◽  
Clay Ceramics ◽  
Scanning Electron Microscopes ◽  
Ceramic Clay

The incorporation of industrial residues into red clay ceramics has in past decades been used not only as a search for the alternative use of lower cost raw-materials but also an environmentally correct way of destination of polluting wastes. This work had as its objective to study the influence of incorporation of a quartzite stone residue on the mechanical strength of a red clay ceramic. Clay bodies were prepared with up to 40 wt% of the residue. These clay bodies were then uniaxially press-molded and sintered at 800 and 1050oC. The strength was evaluated by three points bend tests. The microstructural analysis was conducted by means of both optical and scanning electron microscopes. A tendency for decreasing the strength was found with the amount of incorporated residue. This was a consequence of the inert characteristic of the quartz, which is the predominant mineral in the quartzite stone, as well as the possible effect of cracks nucleated during the quartz allotropic transformation.

Characterization of a Quartzite Residue and its Application in Red Clay Ceramics

2014 ◽  
Vol 805 ◽  
pp. 541-546 ◽  
Author(s):  
Michelle Pereira Babisk ◽  
Wagner Souza Ribeiro ◽  
Mariane Costalonga de Aguiar ◽  
Sergio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira ◽  
...  
Keyword(s):  
Ceramic Industry ◽  
Raw Materials ◽  
Red Clay ◽  
Northeast Region ◽  
Ornamental Stone ◽  
Clay Body ◽  
Clay Ceramics

The fabrication of conventional red clay ceramics products for civil construction, such as bricks and roofing tiles, normally uses other raw materials like sand, in addition to clay, as a way to condition the final ceramic properties. Quartzite residues, from ornamental stone processing in the northeast region of Brazil, could be used as possible conditioner material for clay body in a ceramic industry owing to its similar characteristics to common sand. In the present work, complementing a recent publication on the same materials, a quartzite residue was characterized and its potential as a red clay ceramic addition was evaluated for different composition up to 40 wt%. The results indicated economical advantages in association with some technical benefits.

scholarly journals Ethnomedical uses, chemical constituents, and evidence-based pharmacological properties of Chenopodium ambrosioides L.: extensive overview

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Félicien Mushagalusa Kasali ◽  
Jonans Tusiimire ◽  
Justin Ntokamunda Kadima ◽  
Amon Ganafa Agaba
Keyword(s):  
Large Scale ◽  
Chemical Constituents ◽  
Main Body ◽  
Pharmacological Properties ◽  
Chenopodium Ambrosioides ◽  
Traditional Medicines ◽  
Plant Parts ◽  
Chemical Studies ◽  
Ethnomedicinal Uses ◽  
Significant Health

Abstract Background The Chenopodium genus is a plant family widely spread worldwide that includes various plant species reputed to possess several medicinal virtues in folk medicines. Chenopodium ambrosioides L. is among the most used plants in traditional medicines worldwide. This review aimed to highlight ethnomedicinal uses, phytochemical status, and pharmacological properties of C. ambrosioides L. Main body of the abstract The analysis of relevant data highlights various ethnomedicinal uses against human and veterinary diseases in forty countries. Most indications consisted of gastrointestinal tract dysfunctioning troubles and worms parasitemia. Around 330 chemical compounds have been identified in different plant parts, especially in its essential oil fractions (59.84%). However, only a few compounds—mainly monoterpenes and glycosides—have been isolated and characterized. Experimental pharmacological studies validated a large scale of significant health benefits. It appeared that many monoterpenes are antioxidant, insecticidal, trypanocidal, analgesic, antifungal, anti-inflammatory, anti-arthritic, acaricidal, amoebicidal, anthelmintic, anticancer, antibacterial, antidiabetic, antidiarrheal, antifertility, antifungal, anti-leishmanial, antimalarial, antipyretic, antisickling, antischistosomal, antiulcer, anxiolytic, immunomodulatory, molluscicidal, and vasorelaxant agents. Short conclusion Thus, the Chenopodium ambrosioides species necessitates further chemical studies to isolate and characterize new bioactive secondary metabolites and pharmacological investigations to precise the mechanisms of action before clinical trials.

scholarly journals CLASSIFICATION OF ARTISTIC GLAZED CERAMICS OF DERBENT OF THE END VIII-X CENTURIES. (on the example of materials from excavations XXVII and XXXIII)

2020 ◽  
Vol 16 (3) ◽  
pp. 714-759
Author(s):  
Zuhra Z. Kuzeeva
Keyword(s):  
Large Set ◽  
Red Clay ◽  
Large Section ◽  
Wide Range ◽  
Opaque Glaze ◽  
Clay Ceramics ◽  
The City ◽  
Household Ceramics ◽  
Archaeological Excavations

The article is devoted to the classification analysis of the glazed ceramics of Derbent, originating from the materials of archaeological excavations (excavations XXVII and XXXIII), carried out in 2014-2015. in the city. The chronological framework of the study was presumably determined by the end of the VIII-X centuries. The relevance of the topic is characterized by the importance of studying the glazed ceramics of Derbent as a source of a large set of information (historical, cultural and socio-economic interactions of Derbent with a wide range of countries of the Near and Far Abroad).Typology of glazed ceramics in Derbent at the end of the 8th-10th centuries is considered in the article on the basis of modern methodological developments based on three main approaches to the study of any ceramics: the study of technology together with the morphology and decor of the dishes. All investigated ceramics, consisting of fragments of rims, bodies, bases and handles of vessels, are included in one large Section - Household ceramics. This section includes three sections, which are based on the analysis of the clay color of the shard (red clay, brown clay, beige clay ceramics), which determines the technology for the production of dishes. Based on the presence or absence of engobe on ceramics, two subsections are allocated in each department. The next division is the groups that are formed according to the degree of transparency of the opaque glaze. There are three of them: ceramics with transparent, translucent, opaque (dull) glaze. Within some groups, four subgroups are additionally distinguished, determined by the color of the glaze. According to the peculiarities of the additional decor, the types (overglaze, underglaze ornament) and subtypes (painting, engraving, combination of painting with engraving, relief ornament) of ceramics are distinguished. Thus, the characteristics of the glazed ceramics of Derbent from these excavations include: Section, department, sub-department, group, subgroup, type, subtype.

The Late Wisconsinan Savanna Terrace in Tributaries to the Upper Mississippi River

1983 ◽  
Vol 20 (2) ◽  
pp. 165-176 ◽  
Author(s):  
Mark A. Flock
Keyword(s):  
Mississippi River ◽  
Large Scale ◽  
Lake Superior ◽  
Mississippi Valley ◽  
Red Clay ◽  
Radiocarbon Dates ◽  
Jackson County ◽  
Late Wisconsinan ◽  
Different Sources ◽  
Lacustrine Deposit

The Savanna Terrace, composed of alternating red and gray clayey sediments of late Wisconsinan age, can be found in five states along the upper Mississippi valley from Pepin County, Wisconsin, to Jackson County, Illinois. The terrace is the highest glaciofluvial-lacustrine deposit without a loess cover in the upper Mississippi valley. Chemical, physical, and mineralogical data show that two different sources provided sediment. The red clay is believed to have come from Lake Superior sources, while the gray clay is believed to have come from sources farther west. Large-scale flood events from glacial Lakes Agassiz, Grantsburg, and Superior were probably the main contributors of the sediments. The red clay in the terrace is similar in composition to red glaciolacustrine sediment found in eastern and northern Wisconsin. It also is mineralogically similar to the Hinckley Sandstone and the Fond du Lac Formation, which occur under and around Lake Superior. Radiocarbon dates obtained from the lower Illinois valley indicate that the terrace sediments were deposited sometime between about 13,100 and 9500 yr ago. Soils developed on the terrace are variable in their physical, chemical, and mineralogical properties, which reflect the composition of the clayey sediments.

scholarly journals Vectorized magnetometer for space applications using electrical readout of atomic scale defects in silicon carbide

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Corey J. Cochrane ◽  
Jordana Blacksberg ◽  
Mark A. Anders ◽  
Patrick M. Lenahan
Keyword(s):  
Solid State ◽  
Large Scale ◽  
Atomic Scale ◽  
Radiation Environment ◽  
Optically Pumped ◽  
Space Applications ◽  
Viable Solution ◽  
Jovian System ◽  
Induced Changes ◽  
Venusian Surface

Abstract Magnetometers are essential for scientific investigation of planetary bodies and are therefore ubiquitous on missions in space. Fluxgate and optically pumped atomic gas based magnetometers are typically flown because of their proven performance, reliability, and ability to adhere to the strict requirements associated with space missions. However, their complexity, size, and cost prevent their applicability in smaller missions involving cubesats. Conventional solid-state based magnetometers pose a viable solution, though many are prone to radiation damage and plagued with temperature instabilities. In this work, we report on the development of a new self-calibrating, solid-state based magnetometer which measures magnetic field induced changes in current within a SiC pn junction caused by the interaction of external magnetic fields with the atomic scale defects intrinsic to the semiconductor. Unlike heritage designs, the magnetometer does not require inductive sensing elements, high frequency radio, and/or optical circuitry and can be made significantly more compact and lightweight, thus enabling missions leveraging swarms of cubesats capable of science returns not possible with a single large-scale satellite. Additionally, the robustness of the SiC semiconductor allows for operation in extreme conditions such as the hot Venusian surface and the high radiation environment of the Jovian system.

Microstuctural Evaluation of a Clay Ceramic Incorporated with Granite Rejects from Stone Sawing Using Diamond Wire

2014 ◽  
Vol 798-799 ◽  
pp. 251-256 ◽  
Author(s):  
Mariane Costalonga de Aguiar ◽  
Monica Castoldi Borlini Gadioli ◽  
Michelle Pereira Babisk ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
...  
Keyword(s):  
X Ray Diffraction ◽  
Huge Amount ◽  
Red Clay ◽  
Industrial Activity ◽  
Diamond Wire ◽  
X Ray ◽  
The Social ◽  
Ornamental Stones ◽  
Clay Ceramics ◽  
Scanning Electron

The Brazilian sector of ornamental stones is concentrated in the country’s southeast part. This sector has both the social and economical relevance because of the magnitude of the production, including that for exportation, in association with a large number of job positions. In particular, the state of Espirito Santo (ES) is responsible for more than half of the Brazilian exportation of ornamental stones. Consequently a huge amount of wastes and rejects is generated in this ES industrial activity. The present work evaluated the microstructure of red clay ceramics incorporated with a reject from the sawing of granite blocks using the technology known as diamond wire. The clay ceramic was incorporated with 40 wt% of reject and fired at 750 and 1050oC. The microstructure was evaluated by optical and scanning electron microscopy as well as X-ray diffraction. The results indicated that the incorporation sensibly changed the microstructural aspects in which more consolidated characteristics are observed at 1050oC.

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