SILICA PURIFICATION FORM MERAPI VOLCANO SAND AS PHOTOVOLTAIC RAW MATERIALS

Purification of silica sand volcanic Mount Merapi has been done, for raw material photovoltaic. Leaching purification process is done using aqua regia solution, H2SO4, and HCl. Purification of silica sand of Mount Merapi as a raw material photovoltaic assumes that photovoltaic technologies that utilize solar energy is quite affordable, do not run out, and clean so that it will provide long term benefits are substantial. Stage purification process through grinding up to size 60 mesh, iron using magnetic separation, leaching of acid and alkaline leaching. Characterization of the samples using XRD and XRF. The result showed that Mount Merapi volcanic sand containing silica is high at 48-50%. XRD characterization results indicate that the silica in sand samples well as silicon dioxide or mineral has amorphous structure. Among aqua regia, H2SO4 and HCl leaching that has the ability to nicest namely the concentration of concentrated HCl and purified silica has a purity of 59%. Keywords: purification, silica, volcano sand

Download Full-text

Quality Characterization of Iron Dust Exhaust Thermal as Alternative Ceramic Coating Raw Materials in a Brazilian Company

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1077.135 ◽

2014 ◽

Vol 1077 ◽

pp. 135-138

Author(s):

Luiz Oliveira Veriano dalla Valentina ◽

Marilena Valadares Folgueras ◽

Wanessa Rejane Knop ◽

Maria Cristina Pacheco do Nascimento ◽

Glaucia Aparecida Prates

Keyword(s):

Ceramic Coating ◽

Raw Materials ◽

Ceramic Materials ◽

Raw Material ◽

Silica Sand ◽

Commercial Application ◽

X Ray Diffraction ◽

X Ray ◽

Materials Used

As the raw materials used in the ceramic materials manufacturing are natural, it is important to use them as a alternative materials, thus decreasing the elements demand taken from nature. This paper aims the characterization of foundry solid powder exhaust from a brazilian company located in Joinville - SC as an alternative raw material for ceramic coating by X-ray diffraction (XRD), thermal analysis (DSC) and thermogravimetric (TG). The dust depletion is caused in the manufacturing mold sand process, when the bentonita (clay), silica sand and coal during the metal parts production are mixed in green sand production. The raw materials were characterized through X-ray diffraction (XRD), thermal (DSC) and thermogravimetric analisys (TG). The atomized powder thermogravimetric analysis curve shows three intervals associated with the mass loss and it is typical of clay commercial application.

Download Full-text

Pengaruh Penggunaan Batu Basalt Lampung dan Batubara dalam Bahan Baku terhadap Karakteristik Klinker

Jurnal Teknologi Bahan dan Barang Teknik ◽

10.37209/jtbbt.v10i1.167 ◽

2020 ◽

Vol 10 (1) ◽

pp. 49

Author(s):

Suharto Suharto ◽

Muhammad Amin ◽

Muhammad Al Muttaqii ◽

Syafriadi Syafriadi ◽

Kiki Nurwanti

Keyword(s):

Experimental Study ◽

Raw Materials ◽

Coal Ash ◽

Heating Time ◽

Raw Material ◽

Silica Sand ◽

Cement Clinker ◽

Duration Of Heating

Experimental study on the use of basalt stone originated from Lampung has been conducted to evaluate its potential for a partial substitute of raw material in production of cement clinker. The basalt stone contains minerals of anorthite, augite, and albite phases that are required for clinker formation. In this study, the main raw materials were 80% limestone, 10% silica sand, 9% clay and 1% iron sand. The raw material in these experiments were mixtures 90% or 80% of the main raw material and 10% or 20% of basalt stone. The effect of adding coal to raw materials was also studied to see the possibility of an increase in clinkerization temperature inside the raw material mixture, and at the same time to see the effect of coal ash on clinker composition. Clinker obtained from heating of raw materials at a temperature of 1100oC had LSF of 94.1% and 95.1% (heating time of 1 and 3 hours). If heating is carried out at 1200oC, the clinker had LSF of 97.7% and 98.0% (heating time of 2 and 3 hours, respectively). Depending on the temperature and duration of heating, the clinker mostly had SM in the range of 2.18-2.40% , and AM in the range of 0,78-1.80%. Characterization using XRD showed that the clinker consisted of larnite and gehlenite phases, and dominated by CaO.Batu basalt Lampung telah diuji potensinya sebagai pengganti sebagian bahan baku utama pembuatan klinker semen. Batu basalt tersebut memiliki mineral-mineral dalam fase anorthite, augite, dan albite yang diperlukan pada pembentukan klinker. Pada penelitian ini, bahan baku utama adalah batu kapur 80%, pasir silika 10%, tanah liat 9% dan pasir besi 1%. Campuran bahan baku klinker adalah 90% atau 80% bahan baku utama dan 10% atau 20% batu basalt. Efek penambahan batubara ke dalam bahan baku klinker juga dipelajari untuk melihat kemungkinan kenaikan temperatur klinkerisasi di dalam campuran bahan baku, dan sekaligus untuk melihat efek abu batubara terhadap komposisi klinker. Klinker hasil pemanasan bahan baku pada temperatur 1100oC memiliki LSF 94,1% dan 95,1% (lama pemanasan 1 dan 3 jam). Jika pemanasan dilakukan pada 1200oC, klinker memilik LSF 97,7% dan 98,00% (lama pemanasan 2 dan 3 jam). Tergantung pada temperatur dan lama pemanasan, klinker hasil percobaan ini umumnya memiliki SM 2,18-2,40%, dan AM antara 0,78-1,80%. Karakterisasi dengan XRD menunjukkan bahwa klinker terdiri dari fase larnite dan gehlenite, dan didominasi CaO.

Download Full-text

A Methodology Based on FT-IR Data Combined with Random Forest Model to Generate Spectralprints for the Characterization of High-Quality Vinegars

Foods ◽

10.3390/foods10061411 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1411

Author(s):

José Luis P. Calle ◽

Marta Ferreiro-González ◽

Ana Ruiz-Rodríguez ◽

Gerardo F. Barbero ◽

José Á. Álvarez ◽

...

Keyword(s):

Random Forest ◽

Raw Materials ◽

Principal Component ◽

Hierarchical Cluster ◽

Raw Material ◽

Support Vector ◽

Protected Designation Of Origin ◽

Ft Ir

Sherry wine vinegar is a Spanish gourmet product under Protected Designation of Origin (PDO). Before a vinegar can be labeled as Sherry vinegar, the product must meet certain requirements as established by its PDO, which, in this case, means that it has been produced following the traditional solera and criadera ageing system. The quality of the vinegar is determined by many factors such as the raw material, the acetification process or the aging system. For this reason, mainly producers, but also consumers, would benefit from the employment of effective analytical tools that allow precisely determining the origin and quality of vinegar. In the present study, a total of 48 Sherry vinegar samples manufactured from three different starting wines (Palomino Fino, Moscatel, and Pedro Ximénez wine) were analyzed by Fourier-transform infrared (FT-IR) spectroscopy. The spectroscopic data were combined with unsupervised exploratory techniques such as hierarchical cluster analysis (HCA) and principal component analysis (PCA), as well as other nonparametric supervised techniques, namely, support vector machine (SVM) and random forest (RF), for the characterization of the samples. The HCA and PCA results present a clear grouping trend of the vinegar samples according to their raw materials. SVM in combination with leave-one-out cross-validation (LOOCV) successfully classified 100% of the samples, according to the type of wine used for their production. The RF method allowed selecting the most important variables to develop the characteristic fingerprint (“spectralprint”) of the vinegar samples according to their starting wine. Furthermore, the RF model reached 100% accuracy for both LOOCV and out-of-bag (OOB) sets.

Download Full-text

PROSPECTS OF USE OF CRYSTOBILIZING PROTEIN-POLYSACCHARID COMPOSITION IN THE PRODUCTION OF MEAT CUTTED SEMI-FOODS

Food Science and Technology ◽

10.15673/fst.v14i1.1642 ◽

2020 ◽

Vol 14 (1) ◽

Author(s):

I. Shevchenko ◽

G. Polishchuk ◽

Ye. Kotliar ◽

T. Osmak ◽

A. Skochko

Keyword(s):

Plasma Proteins ◽

Raw Materials ◽

Meat Products ◽

Sodium Caseinate ◽

Amorphous Structure ◽

Organoleptic Characteristics ◽

Duration Of Storage ◽

Polysaccharide Composition ◽

Minced Meat

One of the technological ways to improve the quality of frozen meat chopped semi-finished products is to use in their composition protein-polysaccharide composite mixtures, which mechanism of cryoprotective action is associated with the formation of amorphous structure of the product, reducing the number of crystallization centers and reducing the activity of water, which is especially important for long-term meat products storage at sub-zero temperatures. For this purpose, the composition of a protein-polysaccharide composition was developed consisting of blood plasma proteins, sodium caseinate, flax fiber and plantain in a ratio of 1:1:2:2. The regularities of the influence of the selected composition on the physicochemical properties of model minced meat systems have been established. The possibility of using this composition to eliminate the disadvantages of low-quality meat raw materials in the semi-finished meat products of has been proved and to counteract the negative effects of their long-term storage in the frozen state. It has been found that the composite mixture of plasma proteins, sodium caseinate, fibers of linen and plantain in the amount of 3% reduces the cryoscopic temperature, decreases the mass fraction of frozen moisture by 1.7% and also reduces water activity by 0.031… 0.067, which helps to extend the shelf life of chopped semi-finished products. Based on the search for the extrema of the mathematical dependence of the amount of frozen water on the duration of storage of minced meat semi-finished products at a temperature of minus 10 ° C was established a rational content of the protein-polysaccharide composition (3%). This allows you to purposefully form and stabilize the specified functional-technological, structural-mechanical and organoleptic characteristics of the finished product. In order to develop recommendations on the use of the protein-polysaccharide composition as a cryoprotectant, the chemical composition and functional-technological properties (FCS) of model minced meat systems with different levels of its use were studied. The technological feasibility of using protein-polysaccharide composition in the amount of 3%, which is an effective cryoprotectant in meat minced systems during low-temperature processing has been proved.

Download Full-text

A Tale of Two Tiles: Characterization of Floor Tiles from the Nineteenth-Century Akko Tower Shipwreck (Israel)

Coatings ◽

10.3390/coatings10111091 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1091

Author(s):

Alexandra Inberg ◽

Dana Ashkenazi ◽

Yishai Feldman ◽

Omri Dvir ◽

Deborah Cvikel

Keyword(s):

Secondary Ion Mass Spectrometry ◽

Raw Materials ◽

Type A ◽

Raw Material ◽

Brown Pigment ◽

Blue Color ◽

Type B ◽

Yellow Color ◽

Floor Tiles

Fragments of decorated floor tiles were retrieved from the Akko Tower shipwreck, Israel. Most tiles were made of bright brown fired clay with a white glaze decorated with colored stenciled motifs (Type A); and others consisted of a red-brown fired clay body, coated with a brown pigment covered with transparent brown glaze (Type B). This study aimed to characterize the two tile types; to reveal information concerning the manufacturing process; and to determine the origin of their raw material. A multidisciplinary approach was used, including light microscopy, SEM-EDS, electron probe microanalysis with wavelength-dispersive X-ray spectroscopy (EPMA-WDS), XRD, Raman spectroscopy, and time-of-flight secondary ion mass spectrometry (TOF-SIMS) analyses. The characterization of both tile types demonstrated the use of different raw materials. The Type A tiles were covered with tin-opacified majolica glaze and colored with various mixtures of pigments. The blue color was due to pigment rich in cobalt; the yellow color was due to Naples yellow and lead-tin yellow I minerals; and the green, orange, and brown colors were all prepared by mixing the Naples yellow pigment with different minerals. These majolica glaze tiles were probably manufactured in Sicily. The brown coating of the Type B tiles was due to pigment rich in lead and iron minerals. These tiles were produced with different manufacturing processes, and apparently made in France.

Download Full-text

QUALIDADE DO CALDO PARA PRODUÇÃO DE ETANOL EM CULTIVARES DE SORGO SACARINO SOB ADUBAÇÃO NITROGENADA

Revista Brasileira de Milho e Sorgo ◽

10.18512/1980-6477/rbms.v16n3p388-400 ◽

2017 ◽

Vol 16 (3) ◽

pp. 388

Author(s):

CRISTÓBAL SOTO SOLANO ◽

NIRALDO JOSÉ PONCIANO ◽

ROGÉRIO FIGUEIREDO DAHER ◽

RAFAEL AUGUSTO DA COSTA ◽

PAULO MARCELO DE SOUZA ◽

...

Keyword(s):

Ethanol Production ◽

Nitrogen Fertilization ◽

Ethanol Yield ◽

Raw Materials ◽

Raw Material ◽

Maximum Value ◽

Total Reducing Sugars ◽

Nitrogen Rates

RESUMO - O sorgo sacarino tem potencial de uso como fonte de matéria-prima para a produção de bioetanol. Objetivou-se, com este estudo, analisar o efeito da adubação nitrogenada de cobertura na qualidade do caldo para produção de etanol de quatro cultivares de sorgo sacarino. O experimento foi conduzido em Campos dos Goytacazes- RJ, de janeiro a maio de 2014. Foram estudadas quatro cultivares de sorgo sacarino: BRS 506, BRS 508, BRS 509 e BRS 511 e cinco de doses de nitrogênio (0, 80, 160, 240 e 320 Kg ha-1), aplicadas aos 25 e 45 dias após semeadura. Os resultados mostraram que valor Brix, açúcares redutores totais, açúcares totais recuperáveis, volume do caldo e rendimento de etanol foram afetados pela adubação nitrogenada. Para todas as características, o valor máximo foi obtido pela dose de 240 kg de N ha-1. Entre as cultivares, a BRS 506 mostrou-se superior em produção de caldo e rendimento de etanol. Enquanto a BRS 511 destacou-se nos atributos ART e ATR, e a cultivar BRS 508 sobressaiu-se no valor Brix. A cultivar BRS 506 apresentou melhor resultado combinado, com maior volume de caldo e rendimento de etanol com as doses de 204 e 212 kg N ha-1, respectivamente. Palavras-chave: biocombustíveis, rendimento de álcool carburante, atributos industriais, caracterização da matéria prima, genótipos. QUALITY OF BROTH FOR ETHANOL PRODUCTION IN CULTIVARS OF SACARINE SORGHUM UNDER NITROGEN FERTILIZATION ABSTRACT - Sweet sorghum has potential as a source of raw material for the production of bioethanol. The objective of this study was to analyze the effect of nitrogen topdressing on the quality of the juice for ethanol production from four cultivars of sorghum. The experiment was conducted in Campos, State of Rio de Janeiro, Brazil, from January to May 2014. Four cultivars of sorghum: BRS 506, BRS 508, BRS 509 and BRS 511 were studied, and five nitrogen rates (0, 80, 160, 240 and 320 kg ha-1), applied to 25 and 45 days after sowing. The results showed that the value Brix, total reducing sugars, total recoverable sugars, broth volume and ethanol yield were affected by nitrogen fertilization. For all features, the maximum value was obtained for the dose of 240 kg N ha-1. Among cultivars, BRS 506 was superior in production of broth and ethanol yield. BRS 511 stood out in the attributes ART and ATR, and BRS 508, in value Brix. BRS 506 had better combined result of higher volume of juice and ethanol yield with doses of 204 and 212 kg N ha-1, respectively Keywords: biofuels, fuel ethanol output, industrial attributes, characterization of raw materials, genotypes.

Download Full-text

Investigations of quartz raw materials from the locality of Rekovac muncipality

Hemijska industrija ◽

10.2298/hemind190328023m ◽

2019 ◽

Vol 73 (4) ◽

pp. 265-274

Author(s):

Slavica Mihajlovic ◽

Zivko Sekulic ◽

Jovica Stojanovic ◽

Vladan Kasic ◽

Iroslav Sokic ◽

...

Keyword(s):

Chemical Composition ◽

Physical Properties ◽

Quartz Sand ◽

Raw Materials ◽

Construction Materials ◽

Size Fraction ◽

Point Of View ◽

Raw Material ◽

Potential Applications

Quality of raw materials, including quartz sand and quartzite, varies from one deposit to another. Furthermore, the material quality determines in which industrial branches it can be used after certain preparation processes. Potential applications of quartz raw materials are: in the construction and refractory industry, ceramics and glass industry, then in metallurgy, foundry and also in production of water treatment filters. Geological investigations of the central Serbia region, in the Rekovac municipality, resulted in identification of occurrence of quartz sand ("Ursula") and quartzite ("Velika Krusevica"). Preliminary laboratory tests and characterization of the quartz sand size fraction -0.63+0.1 mm confirmed the possibility of applying this size fraction in the construction materials industry, while the quartzite can be used in refractory, glass and metallurgy industries. After determining the geological reserve of quartz sand "Ursula" and quartzite "Velika Krusevica", detailed investigations are required. Quality conditions from the aspect of chemical composition and physical properties of quartz sand and quartzite are mostly clearly defined by a special standard for this purpose. On the other hand, there are also application areas where standards does not exist, but users define their quality conditions. This example is with the application of quartz sand in the production of water glass. Chemical composition as well is not always the determining factor for the application of quartz raw material. For example, for quartz sand used for sandblasting, grain form is essential. From the economic analysis point of view, the prices of quartz raw materials vary depending on their chemical and physical properties. After all, what needs to be pointed out is the fact that these raw materials are very widespread in nature and that their exploitation is quite simple. After the raw material is excavated, it is stored and further sieved, washed, dried and processed according to customer requirements. All of these processes are cheaper than preparing, for example, limestone, and significaly cheaper than preparation of metal ores.

Download Full-text

Circular investments as a key to solving the growth dilemma

Economic Annals-ХХI ◽

10.21003/ea.v188-07 ◽

2021 ◽

Vol 188 (3-4) ◽

pp. 58-68

Author(s):

Ludmila Kormishkina ◽

◽

Evgenii Kormishkin ◽

Vladimir Gorin ◽

Dmitrii Koloskov ◽

...

Keyword(s):

Raw Materials ◽

Multiple Linear Regression Model ◽

Raw Material ◽

Household Waste ◽

Negative Effects ◽

Methodological Foundation ◽

Material Resources ◽

Real Gdp ◽

Scientific Hypothesis

The rationale for this study is based on the extreme importance of finding a solution to a complex growth dilemma arising from the negative effects of human activity and the limited ability of the ecosystem to regenerate and provide resources required by mankind to ensure sustainable development and the long-term prosperity. The research is aimed at proving a scientific hypothesis that states: when the global raw-materials crisis becomes increasingly noticeable in various countries of the world, including Russia, circular investments may become a driver for long-term economic growth and the launch of far-reaching reforms of the economy in the 21st century. Circular investments in this paper are viewed as a special type of real eco-investment that combines advancements in technology and innovations to ensure renewal and industrial-scale reproduction of resources (raw materials and energy) from industrial and household waste, along with the mitigation and/or elimination of negative effects, on the environment. A multiple linear regression model has been developed to confirm a statistically-relevant connection between circular investments and real GDP. As a methodological foundation for the model, we used the classic Cobb-Douglas production function modified to take into account industrially reproduced raw material resources included in the production process. Further, we have defined major limits for circular investments in Russia today and highlighted the primary measures which are to be taken to launch circular investments in order to find a solution to the complex growth dilemma.

Download Full-text

FAKTOR-FAKTOR YANG MEMPENGARUHI PERKEMBANGAN UMKM DI SURAKARTA

Jurnal Bisnis dan Manajemen ◽

10.20961/jbm.v14i1.2678 ◽

2016 ◽

Vol 14 (1) ◽

pp. 15

Author(s):

Hartono Hartono ◽

Deny Dwi Hartomo

Keyword(s):

Development Strategy ◽

Raw Materials ◽

Small And Medium Enterprises ◽

Raw Material ◽

Labor Costs ◽

Strategic Advice ◽

Medium Enterprises ◽

Performance Conditions ◽

The City

Micro, Small and Medium Enterprises (MSMEs) have a very significant impact on the Indonesian economy. Therefore, it is important to do research in order to determine the condition of current performance and analyze the factors that influence the development of MSMEs and to provide strategic advice on the development of MSMEs in Surakarta. Long-term goal is the development of MSMEs in Surakarta in the future as measured from the increase in sales, so the SMEs entrepreneurs increase revenue, reduce unemployment and ultimately can reduce the level of poverty in Surakarta by particular and Indonesia by general.The study took a sample of 91 MSMEs entrepreneurs spread across five districts in the city of Surakarta. Each district taken by SMEs entrepreneurs with purposive sampling method. Mapping MSMEs performance conditions were analyzed descriptively to describe various aspects such as firm age, labor, raw materials, capital and problems faced. While the factors that influence the development of MSMEs were statistically analyzed with multiple regression models.The results showed that the performance of the mapping conditions of SMEs in Surakarta average face problems in raw material costs, labor costs and promotion costs, as well as in the capital. Capital cost and total variable evidenced by the positive and significant impact on the development of the business. While the age factor and the company's workforce does not have a significant influence on the development of SME. It can be understood that the main problem in SMEs are raw materials and capital. There is a type of business that is not easy to obtain raw materials in the market. Therefore SME development strategy with more emphasis on the supply of raw material, marketing, production, and capital.

Download Full-text

Synthesis and characterization of innovative insulation materials

MATEC Web of Conferences ◽

10.1051/matecconf/201814901078 ◽

2018 ◽

Vol 149 ◽

pp. 01078

Author(s):

Aggeliki Skaropoulou ◽

Afroditi Ntziouni ◽

Dimitris Kioupis ◽

Sotiris Tsivilis ◽

Glikeria Kakali

Keyword(s):

Raw Materials ◽

Raw Material ◽

Synthesis And Characterization ◽

Insulation Material ◽

Foaming Agent ◽

Insulation Materials ◽

Major Disadvantage ◽

Reinforcing Agent ◽

By Products

Insulation elements are distinguished in inorganic fibrous and organic foamed materials. Foamed insulation materials are of great acceptance and use, but their major disadvantage is their flammability. In case of fire, they tend to transmit the flame producing toxic gases. In this paper, the synthesis and characterization of innovative inorganic insulation materials with properties competitive to commercial is presented. Their synthesis involves the mixing of inorganic raw material and water with reinforcing agent or/and foaming agent leading to the formation of a gel. Depending on raw materials nature, the insulation material is produced by freeze drying or ambient drying techniques of the gel. The raw material used are chemically benign and abundantly available materials, or industrial by-products and the final products are non-toxic and, in some cases, non-flammable. Their density and thermal conductivity was measured and found 0.02-0.06 g/cm3 and 0.03-0.04 W/mK, respectively.

Download Full-text