scholarly journals Use of Mining Tailings or Their Sedimentation and Flotation Fractions in a Mixture with Soil to Produce Structural Ceramics

2021 ◽  
Vol 13 (2) ◽  
pp. 911
Author(s):  
Igor BC. Amaral ◽  
Luis Carlos D. Cavalcante ◽  
José D. Fabris ◽  
Bernat V. Prat ◽  
Arlete B. Reis
Keyword(s):  
Mineralogical Composition ◽  
Ceramic Materials ◽  
Maximum Amount ◽  
Industrial Processes ◽  
Technological Properties ◽  
Structural Ceramics ◽  
Mining Tailings ◽  
Iron Mining ◽  
Chemical And Mineralogical Composition

The ceramic materials industry has vast potential for use of waste from industrial processes, such as iron mining tailings. The aim of this study was to test technological use of tailings samples from the dam rupture of the Samarco S.A. Company in 2015 to produce structural ceramics. Sedimentation and flotation processes were used to improve their characteristics, analyzing their chemical and mineralogical composition and granulometry. We produced 48 samples with a mixture of soil and residues in proportions of 10, 20, and 30 wt%, with sintering at 950 °C. The results showed that co-processing of iron mining tailings can be considered viable for improving certain aspects of some technological properties. The maximum amount of residue used was 30 wt% for any of the fractions used, as above this concentration the specimens lose important characteristics.

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 Mineralogical Composition and Physical–Mechanical Properties of Dasht-E-Taatrang Zar Sand Deposits (Afghanistan)

2020 ◽  
Vol 5 (1) ◽  
pp. 2
Author(s):  
Hemayatullah Ahmadi ◽  
Atal Yousufi ◽  
Amir Mohammad Mosazai
Keyword(s):  
Mechanical Properties ◽  
Construction Material ◽  
Mineralogical Composition ◽  
Xrd Analysis ◽  
Sample Collection ◽  
Extensive Field ◽  
Chemical And Mineralogical Composition ◽  
New City ◽  
Two Phases ◽  
Field Works

Sand is a common construction material used for various purposes, e.g., concrete, mortar, render, screed, and asphalt. The usage depends on its fineness, and its fineness is controlled by its mineralogical composition and physical-mechanical properties. This research aims to determine the chemical and mineralogical composition and the physical-mechanical properties of the Dasht-e-Taatrang Zar sand deposits within the Qarabagh and Bagram districts of Kabul and Parwan provinces in Afghanistan. To achieve the objectives of this research, a review of the existing literature has been combined with new extensive field works for macroscopic studies and sample collection, and laboratory analyses. In total, 23 samples during two phases of field works were collected and subjected to lab works for XRF, Schlich, and XRD analysis to determine the chemical and mineralogical composition; moreover, sieve and Atterberg analysis, specific gravity, soundness, and alkali-silica reaction tests were performed for characterization of the physical-mechanical properties of the studied samples. The results of the tests show that the Taatrang Zar sand deposits are considered as a suitable construction material, and due to their simple accessibility, the deposits have high potential as a construction material supplier for the Kabul new city project (Dehsabz) in Kabul and adjacent Parwan and Kapisa provinces.

scholarly journals Chemical and mineralogical composition of clay fraction found in Podillia upland haplic chernozems

2017 ◽  
pp. 278-292
Author(s):  
Igor Papish ◽  
Oleksii Telehuz
Keyword(s):  
Clay Fraction ◽  
Soil Formation ◽  
Mineralogical Composition ◽  
Development Stage ◽  
Potassium Feldspar ◽  
Forest Steppe ◽  
Molar Ratios ◽  
Haplic Chernozems ◽  
Typical Chernozems ◽  
Chemical And Mineralogical Composition

The article presents data on gross chemical and mineralogical composition of clay faction found in typical chernozems occurred within the Podillia Upland. Geographical regularities of formation as regards clayey profile of Chernozems pertaining to the same genetic series are revealed. The relationship between conditions and Chernozem development stage, character of vertical differentiation of basic mineral phases of clayey plasma and its chemical and mineralogical composition are shown. Izoclayey profile of hydromicas is the consequence of their relative accumulation as a result eluviation of colloid-dispersible mica-smectite minerals. The character of clay profile observed in Chernozems is determined by the correlation of intensity of carbonates leaching, lessivage and soils argillisation. Typical Podolian Chernozems are characterised with the like weathering crust of silicate type. The modern Chernozem clayey profile originated mainly during a wetter stage of soil formation. In the ploughable layer a high content of clastic minerals (quartz, potassium feldspar, sodium plagioclase) is observed. Random mixed and stratified mica-smectite minerals with a high content (>50 %) of smectite packets (33–63 %), hydromica (33–52 %), and kaolinite plus chlorite (4–15 %) are present in the profile. The mineralogical composition of soils clay fraction indicates obvious signs of smectite eluviation and relative illite accumulation. Clayey profile of the Bug upstream plateau located within the Podillia Upland is atypical for Chernozems found in the eastern forest-steppe and steppe areas. The distribution character of layered silicates, especially smectite, is even more contrastive. Clayey plasma redistributes differentially through leaching and lessivage processes. Accumulative type of sludge deposits formed in Chernozems of the Dniester plateau located within the Podillia Upland, even profile distribution of basic oxides and molar ratios of SiO2 : Al2O3 and SiO2 : Fe2O3 against the background of decreased downward smectite content indicate weakened eluviation of fine-grained clays towards the Dniester. The prevalence of smectite over hydromicas within the entire profile indicates argillisation of Chernozems. Key words: Chernozem, chemical-mineralogical composition, clayey minerals, hydromica, smectite, kaolinite, leaching, lessivage, argillisation.

Residue Characterization from Polishing Granite Submitted to the Hydrocycloning Process

2018 ◽  
Vol 930 ◽  
pp. 584-588
Author(s):  
André Luiz Araújo Caetano ◽  
Manoel da Cruz Barbosa Neto ◽  
Verônica Cavalcanti Marques ◽  
Daniel A. de Macedo ◽  
Heber Sivini Ferreira ◽  
...  
Keyword(s):  
Environmental Concern ◽  
Raw Materials ◽  
Industrial Processes ◽  
Technological Properties ◽  
Separation And Purification ◽  
Efficient Tool ◽  
Different Characteristics

The waste generated in granite processing has caused great social and environmental concern due to the release of its solid effluents into landfills and other places. The recycling and reuse of waste from different industrial processes as new raw materials has been the object of various researches. The use of hydrocyclone in the treatment of residues can represent a very efficient tool for separation and purification of the granite residue. This work aims to characterize and analyse the technological properties of the granite sawdust residues submitted to the hydrocyclone process in comparison with the same residue without going through the hydrocyclone process. The results indicate that the material resulting from this process presented different characteristics from the material without the process, mainly in terms of granulometric distribution and technological properties.

Study on Erosion Resistance of Structural Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 1323-1326
Author(s):  
Chong Gao Bao ◽  
Wei Pan ◽  
He Zhuo Miao ◽  
Long Hao Qi
Keyword(s):  
Erosion Resistance ◽  
Failure Mechanisms ◽  
Ceramic Materials ◽  
Solid Particles ◽  
Failure Pattern ◽  
Structural Ceramics ◽  
Crystal Boundary ◽  
Binding Phase ◽  
Rotary Disk ◽  
Main Factors

The erosion resistance performances of high-Cr cast iron Cr15Mo3 and three kinds of structural ceramics, a-Al2O3, ZTA, Si3N4, were investigated in flowing suspensions of solid particles with a rotary disk erosion wear tester. The microcosmic failure mechanisms of their wear surfaces were analyzed. The results showed that the erosion resistance of Si3N4, ZTA, a-Al2O3 is 21.8, 8.2, 5.6 times than that of Cr15Mo3 respectively. For ceramic materials, toughness and strength are two main factors that affect erosion resistance rather than hardness. The wear rate of ceramic materials is in proportion to the strength and the biquadratic toughness. Due to erosion, Cr15Mo3 is worn out most in the whole, the erosion holes are very clear and its failure pattern is in “W” shape. The wear of ZTA and Al2O3 mainly occurs in the binding phase of the crystal boundary. Thus, the crystal grains are exposed, but without breaks and cracks. The failure pattern is in the shape of “U”. Si3N4 only loses some binding phase of the crystal boundary and the erosion surface is smooth.

scholarly journals 4. Parent Bodies of Iron Meteorites

1977 ◽  
Vol 39 ◽  
pp. 439-444
Author(s):  
E. R. D. Scott
Keyword(s):  
Mineralogical Composition ◽  
Parent Body ◽  
Iron Meteorites ◽  
Chemical And Mineralogical Composition

On the basis of their chemical and mineralogical composition, 420 iron meteorites have been classified into 12 different groups. Each group seems to have come from a separate parent body. The largest group, IIIAB, probably formed an asteroidal core in a body approximately 100 km in radius, which was largely destroyed by collision 630 My ago. Another 67 analyzed irons do not belong to these groups, and may represent samples from another 20 or more bodies.

Chemical and mineralogical composition of Amazon River floodplain sediments, Brazil

1993 ◽  
Vol 8 (4) ◽  
pp. 391-402 ◽  
Author(s):  
Luiz A. Martinelli ◽  
Reynaldo L. Victoria ◽  
Jose Luiz I. Dematte ◽  
J.E. Richey ◽  
A.H. Devol
Keyword(s):  
Mineralogical Composition ◽  
Amazon River ◽  
River Floodplain ◽  
Chemical And Mineralogical Composition ◽  
Floodplain Sediments
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