scholarly journals Characterization of Chemical Composition and Microstructure of Natural Iron Ore from Muko Deposits

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Abraham J. B. Muwanguzi ◽  
Andrey V. Karasev ◽  
Joseph K. Byaruhanga ◽  
Pär G. Jönsson
Keyword(s):  
Chemical Composition ◽  
Iron Ore ◽  
World Market ◽  
Ore Deposits ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Fe Content ◽  
Natural Iron ◽  
Western Uganda

The study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area (south-western Uganda). The quality of this iron ore was evaluated to establish its suitability to serve as a raw material for iron production. Samples were taken from the six hills of Muko ore deposits and tests carried out to establish their composition and properties. X-ray diffraction and scanning electron microscopy were employed in the investigation and chemical analysis performed to determine the compounds constituting the ore. The quality of this ore was compared to generalized world market standards and ores from other nations. It was found that Muko ore is a rich hematite grade with Fe content above 65%. It has little gangue (<6% SiO2 and 3-4% Al2O3) and low contents of the deleterious elements (P~0.02% and S<0.006%), which correspond to acceptable levels for commercial iron ores.

scholarly journals GENETIC MODEL OF LJUBIJA BRANDS DEPOSITS − RAW MATERIALS FOR PRODUCTION OF MINERAL PIGMENTS

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Aleksej Milošević ◽  
Ranko Cvijić ◽  
Miodrag Čelebić ◽  
Žarko Kovačević
Keyword(s):  
Iron Ore ◽  
Genetic Model ◽  
Raw Materials ◽  
Mineral Resources ◽  
Ore Deposits ◽  
Raw Material ◽  
Substantial Part ◽  
Iron Mineral ◽  
Natural Iron ◽  
Iron Ore Deposits

Specific characteristics of iron ore deposits in Ljubija ore region are given by pelitoid iron ores (,,brand“) which occupy a substantial part of iron mineral resources, on which industrial production of natural iron oxide – pigments depends. This particular technology type of iron ore deposits, until recently was waste from mining production, and now when it is possible to implement new technological processes, that waste became an important commercial product. This paper presents the results of detailed geological research which lasted for a few years, as well as laboratory and tehnological tests. It presents the new data on the metallogenetic characteristics of the environment where iron oxides originate as a raw material for mineral pigments. In this paper, we answered and resolved dilemma about brand identity in adequate genetic iron types in Ljubija mining regions, about their specificity as well as the ore formations and geohistorical development. Through the technological characterization of the ore and its domain of application, we provide the basis for economic evaluation of the deposits of this very important mineral resource.

IMPACT OF INNOVATIVE METHOD OF PREPARING TOBACCO LEAVES FOR DRYING ON THE BASIC PARAMETERS OF QUALITY OF TOBACCO RAW MATERIAL

2019 ◽  
Author(s):  
Е.Е. Ульянченко
Keyword(s):  
Chemical Composition ◽  
Quality Indicators ◽  
Raw Materials ◽  
Raw Material ◽  
Tobacco Leaves ◽  
Commercial Grade ◽  
Innovative Method ◽  
Main Indicator ◽  
Basic Parameters

Исследовано влияние приема прорезания средней жилки на основные качественные показатели табачного сырья. Исследования проводили на листьях основных сортотипов табака Трапезонд и Остролист по массовым ломкам. Прорезание жилки осуществляли на инновационном оборудовании экспериментальном образце линии подготовки листьев табака к сушке ЛПТС360 (ВНИИТТИ, Краснодар). Качество табачного сырья с прорезанной жилкой определяли по товарным сортам, технологическим и курительным свойствам, химическому составу по методикам лабораторного контроля ВНИИТТИ. Инновационный способ подготовки табака к сушке в едином потоке с применением технологического оборудования, включающего прорезатель, выявил положительный технологический результат. Установлена эффективность приема прорезания средней жилки: срок естественной сушки листьев с прорезанной жилкой сократился в 2,5 раза выход 1го товарного сорта сырья составил 74,60 87,93 выход волокна сырья с прорезанной жилкой превышает минимальное значение технологических норм (75) в 1,15 1,26 раз условный расход сырья на единицу курительных изделий меньше норматива на 6 25 улучшен основной показатель химического состава табачного сырья (число Шмука) в 1,6 4,6 раза у сортотипа Трапезонд, в 1,2 1,5 раза у сортотипа Остролист дегустационные свойства сырья не ухудшились. Инновационный способ подготовки листьев табака к сушке, включающий прием прорезания средней жилки, рекомендуется для применения в производстве табачного сырья. The influence of middle vein cutting method on the main quality indicators of tobacco raw materials is studied. Studies were carried out on the leaves of the main varieties of tobacco Trapezond and Ostrolist, on mass breakdowns. Vein cutting was carried out on the innovative equipment of the line of preparation of tobacco leaves for drying LPTS360 (GNU VNIITTI RAA, Krasnodar). The quality of tobacco raw materials with a cut vein was determined by commercial grades, technological and Smoking properties, chemical composition in accordance with the methods VNIITTI. An innovative method of preparing tobacco for drying in a single stream with the use of technological equipment, including a cutter, revealed a positive technological result. The period of natural drying of leaves with cut veins decreased by 2,5 times. The yield of the 1st commercial grade of raw materials was 74,60 87,93. The output of the fiber raw material with cut vein exceeds the minimum value of technological norms (75) in 1,15 1,26 times. Conditional consumption of raw materials per unit of Smoking products is less than the norm by 6 25. The method of cutting the middle vein of the leaves improves the main indicator in the chemical composition of tobacco raw materials (Schmuck ratio) 1,6 4,6 times in the variety Trapezond and 1,2 1,5 times in the variety Ostrolist. The tasting properties of raw materials have not deteriorated. Analysis of raw material quality indicators showed that the innovative method of cutting the middle vein is effective and recommended for use in the production of tobacco raw materials.

Saponite, Corrensite and Chlorite-Saponite Mixed-Layers in the Sancerre-Couy Deep Drill-Hole (France)

Clay Minerals ◽  
1994 ◽  
Vol 29 (1) ◽  
pp. 47-61 ◽  
Author(s):  
D. Beaufort ◽  
A. Meunier
Keyword(s):  
Chemical Composition ◽  
Drill Hole ◽  
X Ray Diffraction ◽  
Parental Relationships ◽  
Clay Deposits ◽  
Fe Content ◽  
Three Samples ◽  
Structural Formulae ◽  
Layer Mineral ◽  
Mixed Layers

AbstractThe clay deposits in fractures of the metamorphic basement under the Paris Basin sedimentary formations at Sancerre-Couy (France) are composed of trioctahedral species which are exceptionally well crystallized. Three samples were chosen in order to study the chemical composition of 100% expandable saponite, 50% expandable corrensite and 10% expandable chlorite-saponite mixed-layer mineral C90–S10 Two sets of microchemical analyses were performed in order to determine the variations of the composition on large and small numbers of particles. X-ray diffraction (XRD) and Mössbauer spectrometry were performed on purified samples.The mathematical decomposition of Si, Al and Mg histograms established from microanalyses of a large number of crystals of saponite, corrensite and C90–S10 evidences bimodal populations. The total Fe content of the three species is unimodal whatever the chemical composition of the surrounding rock and the Fe2+/Fe3+ ratio. The structural formulae established from a large number of microanalyses of a few particles show that there are no parental relationships between saponite, corrensite and C90–S10. The expandable layer of corrensite is characterized by a high charge. It is proposed that the tetrahedral sheets adjacent to the brucitic sheet and the exchangeable interlayer in a 2 : 1 unit are identical in corrensite.

Study on the Effect on Sintering Mineralization of Iron Ore

2013 ◽  
Vol 652-654 ◽  
pp. 2538-2542 ◽  
Author(s):  
Xiao Hui Fan ◽  
Ying Li ◽  
Xu Ling Chen
Keyword(s):  
Grain Size ◽  
Regression Analysis ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Material ◽  
Sintering Process ◽  
Main Effect ◽  
Relationship Model ◽  
Ore Mineralization ◽  
The Relationship

The main effect on iron ore mineralization performance in the sintering process is the grain size of raw material and chemical composition. The results show that -0.5mm particles can mineralize, but +0.5mm particles remain a nucleus in sinter. This paper analyses the effect of the chemical composition on mineralization characteristics of liquid production. The relationship model is established by using regression analysis between the chemical composition and liquid formation characteristics. The mian factors of mineralization in the chemical composition: SiO2, CaO, MgO and Al2O3.

scholarly journals Produksi dan kualitas jamur tiram (Pleurotus ostreatus) pada beberapa konsentrasi limbah sludge pabrik kertas Production and quality of oyster mushroom (Pleurotus ostreatus) on selected concentration of sludge of paper industry

2016 ◽  
Vol 76 (2) ◽  
Author(s):  
Happy WIDIASTUTI ◽  
. TRI-PANJI
Keyword(s):  
Pleurotus Ostreatus ◽  
Paper Industry ◽  
Fruit Body ◽  
Raw Material ◽  
Oyster Mushroom ◽  
Biological Efficiency ◽  
Recycled Paper ◽  
Mushroom Production ◽  
Fe Content

Summary An experiment has been conducted to study the effect of sludge concentration,  waste of paper industry using raw material of recycled paper, as media on oyster mushroom production and quality. Twelve treatment tested are combination of two oyster mushroom strains are oyster mushroom of Bogor (JTB) and oyster mushroom of Taiwan (JTT), three media composition (sawdust, sludge, and sawdust+ sludge (50/50, v/v), and two levels of supplement addition (with rice bran+gypsum+ lime and without) with 10 replications. The production of the  mushroom was conducted  in bag log capacity of 1 kg fresh weight (water content 50%). The result showed that sludge can be used as mixture of oyster mushroom production with the composition 50:50 v/v of sawdust and sludge. Since the higher number of contamination, addition of supplement reduce oyster mushroom production as well as biological efficiency, but increased protein content of fruiting body. The content of Cd, and Pb were below the permissible limits, Cu was higher than the limits but still in the range. The Fe content of mushroom fruit body was higher both in sawdust (147.92 – 149.56 ppm) and sawdust+sludge (295.82 – 335.12 ppm) as media. However, the uptake of Fe of JTT was less (49.08-59.64 ppm) compared to that of JTB (147.92-335.12 ppm).Ringkasan Penelitian dilakukan untuk mempelajari pengaruh konsentrasi sludge limbah pabrik kertas berbahan baku karton bekas sebagai medium terhadap produksi dan kualitas jamur tiram. Dua belas perlakuan yang diuji merupakan kombinasi dua galur jamur tiram, yaitu Jamur Tiram Bogor (JTB) dan Jamur Tiram Taiwan (JTT), tiga jenis komposisi medium (serbuk gergaji, sludge, dan sludge+ serbuk gergaji), dan dua tingkat suplemen (dengan dan tanpa) yang diulang 10 kali untuk masing-masing perlakuan. Produksi jamur tiram dilakukan menggunakan bag log  berkapasitas 1 kg basah (kadar air 50%). Hasil percobaan menunjukkan bahwa sludge dapat digunakan sebagai campuran serbuk gergaji dalam produksi jamur tiram dengan per-bandingan 50:50 (v/v). Pemberian suplemen menurunkan produksi jamur tiram demikian pula efisiensi biologi namun meningkatkan kadar protein tubuh buah. Di dalam tubuh buah JTB, kandungan logam Cd, dan Pb berada di bawah batas yang diijinkan, sedangkan kandungan Cu di atas ambang walaupun masih dalam kisaran. Kandungan  Fe dalam tubuh buah jamur relatif tinggi baik yang ditumbuhkan pada serbuk gergaji sebagai medium standar (147,92 - 149,56 ppm) maupun yang ditumbuhkan pada medium campuran sludge+serbuk gergaji (295,82 - 335,12 ppm). Serapan Fe tubuh buah JTT jauh lebih rendah (49,08- 59,64 ppm) dibandingkan dengan serapan Fe JTB (147,92-335,12 ppm).  

scholarly journals Chemical composition and cooking qualcity of sweet potatoes Morada INTA and Rojo Blanco

1969 ◽  
Vol 76 (3-4) ◽  
pp. 151-159
Author(s):  
Ceferino R. Ordóñez ◽  
María C. Camdessus ◽  
Carlos A. Roig
Keyword(s):  
Chemical Composition ◽  
Soluble Sugars ◽  
Raw Material ◽  
Sweet Potatoes ◽  
San Pedro ◽  
Calcium Phosphorus ◽  
Phosphorus Iron ◽  
Agricultural Experiment ◽  
Hedonic Scale

Chemical composition and cooking quality of two sweet-potato cultivars were analyzed. Morada INTA and Rojo Blanco cultivars from Agricultural Experiment Station-INTA, San Pedro, province of Buenos Aires, Argentina (lAt 33°41'S., long 59° 41'W.), and from harvests of three different years, were used. Dry matter, free aminoacids, starch, reduced soluble sugars, total nitrogen, pectines, specific gravity, sucrose, total ashes, calcium, phosphorus, iron and magnesium were analyzed. Except for aminoacids and iron contents, the averages of Morada INTA parameters were statistically different at 5% probability level from those of Rojo Blanco. Sweet potatoes were also prepared as boiled and candied, and both products were evaluated by a pannel, using a hedonic scale of 5 points. No statistical differences were found between Morada INTA and Rojo Blanco cultivars. Therefore, Rojo Blanco can replace Morada INTA. The quality of the raw material for processing depends on the particular characteristics of the harvest of each year.

A Simplified Method of Synthesis and Purification of 4-Dimethylamino-N-Methyl -4-Stilbazolium Tosylate

2011 ◽  
Vol 686 ◽  
pp. 392-395 ◽  
Author(s):  
Fei You ◽  
Jin Sun ◽  
Bing Teng ◽  
Lin Hua Xia ◽  
Xin Xing Jiang ◽  
...  
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Cooling Method ◽  
Xrd Study ◽  
Nmr Study ◽  
The Cost

DAST (4-dimethylamino-N-methyl-4-stilbazolium tosylate) crystal material was synthesized and purified by a relatively simple method. The synthesis process was easy to operate experimentally and the cost of raw materials can be cut down. The purification process was much easier than the previously published method. Fourier transform infrared spectrum (FTIR) was used to analyze the functional group of raw material and no extra functional groups were found. Nuclear magnetic resonance (NMR) study was performed to identify the different modes presented in the compound. The results showed that the quality of the prepared crystal raw material could meet the requirements on crystal growth. DAST crystals were grown from the synthesized raw material by slowly cooling method. The crystal structure was characterized by X-ray diffraction (XRD) study and the results showed that the crystal grown from the synthesized raw material was the same as that grown from pure DAST crystal raw material.

The Oxidizing Roasting and Reducing Melting of Titaniferous and Conversion Iron Ores

2017 ◽  
Vol 371 ◽  
pp. 117-120 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
G.Yu. Vitkina ◽  
R.V. Petukhov ◽  
L.A. Ovchinnikova
Keyword(s):  
Chemical Composition ◽  
Phase Analysis ◽  
Iron Ore ◽  
Raw Materials ◽  
Pig Iron ◽  
Iron Ores ◽  
X Ray Diffraction ◽  
X Ray ◽  
Melting Temperatures ◽  
Conversion Iron

The chemical composition of pellets of various basicity from pig iron ore materials is described. The metallurgical characteristics (reducibility, strength, softening and melting temperatures) is analyzed. The micro X-ray diffraction phase analysis is made. Also the sinter of various basicity from titaniferous raw materials is investigated.

scholarly journals Determination of the Chemical Composition of Eucalyptus spp. for Cellulosic Pulp Production

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1649
Author(s):  
Túlio Anselmo Sacramento Vieira ◽  
Taiana Guimarães Arriel ◽  
Antônio José Vinha Zanuncio ◽  
Amélia Guimarães Carvalho ◽  
Monique Branco-Vieira ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Lignin Content ◽  
Polar Compounds ◽  
Raw Material ◽  
Alkanoic Acids ◽  
Main Components ◽  
Cellulosic Pulp ◽  
Pulp Production

The chemical composition of wood is important to assess the quality of this raw material for the industry of cellulosic pulp production. The purpose of this work was to determine the chemical composition of Eucalyptus spp. grown for cellulosic pulp production. Ten Eucalyptus spp. clones with six years of age, located in the municipality of Itamarandiba, Minas Gerais, Brazil, were used. Quantification was obtained for extractives, monosaccharides, uronic acids, acetates, lignin, ash and the phenolic composition of the extracts. In average, clones showed around 2.7% extractives, with a predominance of polar compounds soluble in ethanol and water; 27.7% lignin and 0.3% ash. Glucose was the main sugar detected (64.2%), followed by xylose (19.3%). The main components of the extractives were steroids, fatty acids and aromatic acids, followed by smaller amounts of substituted alkanoic acids, fatty alcohols, glycerol derivatives and triterpenes. The ethanol–water extracts presented total phenol contents ranging from 321.4 to 586.6 mg EAG/g of extract, tannins from 28.1 to 65.1 mg catechin/g of extract and flavonoids from 73.6 to 256.9 mg catechin/g of extract. Clones with a higher holocellulose amount and a lower lignin content showed a higher potential for cellulosic pulp production. These findings are important for the development of high-quality wood based on important traits for the pulp and paper sector.

scholarly journals Analysis of drying operation and quality evaluation of crushed meat prepared from three trims of low beef marketing

2019 ◽  
Vol 6 (5) ◽  
pp. 254-257
Author(s):  
Pollorena Gregorio Lopez ◽  
Ariana Sainz Melissa Hernandez ◽  
Grace Erandy Baez Hernandez ◽  
Monica Gamez Luque
Keyword(s):  
Chemical Composition ◽  
Quality Evaluation ◽  
Meat Products ◽  
Physicochemical Characteristics ◽  
Raw Material ◽  
Water Removal ◽  
Drying Process ◽  
Normal Range ◽  
Drying Curves

The objective of this research was to evaluate the performance and quality of three cuts of beef marketing low during the drying process for the preparation of meat crushes. quality (color, pH, aw, chemical composition) of beef cuts glove, neck and lizard cool and their behavior during drying (curves) and the quality of the finished product (color, pH, aw analyzed, chemical composition). Data were evaluated by analysis of variance via. Color and aw in the raw material were within the normal range, while the pH was varied from 5.92-6.45. In the chemical composition, the cut glove had higher moisture content (76.42%). Similarly, during drying, this cut, introduced least resistance for water removal, reaching the desired humidity (25-30%) in less time (240 min). With regard to the finished product, differences in physicochemical characteristics, mainly in color they were presented. The chemical composition, both moisture and protein were affected, which varied between the 24.65-28.09% and 51.70-53.65% respectively. The three cuts have assessed potential for the production of dried meat products, such as crushed and dried meat

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