refractory insulationnatural radioactivity concentration in raw materials used

natural radioactivity concentration in raw materials used for manufacturing refractory products | radioprotection | cambridge core

Natural radioactivity concentration in raw materials used for manufacturing refractory products | Radioprotection | Cambridge Core

Natural radioactivity concentration in raw materials used for manufacturing refractory products - Volume 44 Issue 5 - J. Barescut, A. A. Fathivand, J. Amidi We use cookies to distinguish you from other users and to provide you with a better

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natural radioactivity concentration in raw materials used for manufacturing refractory products - radioprotection

Natural radioactivity concentration in raw materials used for manufacturing refractory products - Radioprotection

Natural radioactivity concentration in raw materials used for manufacturing refractory products A.A. Fathivand 1 and J. Amidi 2 1 Nuclear Science and Technology Research Institute, PO Box, 11365-3486 Tehran, Iran 2 National Radiation Protection

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natural radioactivity concentration in raw materials used for manufacturing refractory products

Natural radioactivity concentration in raw materials used for manufacturing refractory products

Natural radioactivity concentration in raw materials used for manufacturing refractory products A.A Fathivand *,J.Amidi,S.Hafezi Nuclear Science and Technology Research Institute and National Radiation Protection Department, Radiation Applicatio

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natural radioactivity concentration in raw materials used for manufacturing refractory products - international journal of radiation research

Natural radioactivity concentration in raw materials used for manufacturing refractory products - International Journal of Radiation Research

Natural radioactivity concentration in raw materials used for manufacturing refractory products A.A. Fathivand, J. Amidi, S. Hafezi, afathivand@yahoo Abstract: (13729 Views) Background: Some Particular areas contain natural radionuclide at

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natural radioactivity concentration in raw materials used for manufacturing refractory products

Natural radioactivity concentration in raw materials used for manufacturing refractory products

Raw materials used in industries may contain naturally occurring radioactive materials (NORM). The most important are the 238 U and 232 Th and their decay products as well as 40 K [2][3][4] [5] .

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natural radioactivity in refractory manufacturing plants and exposure of workers to ionising radiation

Natural radioactivity in refractory manufacturing plants and exposure of workers to ionising radiation

1/7/2009 · During the first part of the survey, the concentration of natural radioactivity in raw materials and end-products, coming from four plants, was assessed. Several raw materials and, as a consequence, some end-products as well have shown activity

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natural radioactivity in raw materials used in building industry in serbia

Natural radioactivity in raw materials used in building industry in Serbia

8/1/2014 · Natural radioactivity is responsible for most of the total radiation dose received by human population. Geological materials used in building industry usually become contaminated with naturally occurring radioactive materials. They are used as m

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radioactivity and associated radiation hazards in ceramic raw materials and end products

Radioactivity and associated radiation hazards in ceramic raw materials and end products

Studies have been planned to obtain activity and associated radiation hazards in ceramic raw materials (quartz, feldspar, clay, zircon, kaolin, grog, alumina bauxite, baddeleyite, masse, dolomite and red mud) and end products (ceramic brick,

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activity concentration of natural radioactive nuclides in nonmetallic industrial raw materials in japan

Activity concentration of natural radioactive nuclides in nonmetallic industrial raw materials in Japan

1/11/2014 · Natural materials such as rock, ore, and clay, containing natural radioactive nuclides are widely used as industrial raw materials in Japan. If these …

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types of refractory materials and their applications

Types of Refractory Materials and Their Applications

26/10/2015 · As fireclay brick is relatively cheap and its raw materials are widespread, it is the most common type of refractory brick and used widely in most furnaces, kilns, stoves, regenerators, etc

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natural radioactivity concentration in raw materials used for manufacturing refractory products - core

Natural radioactivity concentration in raw materials used for manufacturing refractory products - CORE

Natural radioactivity concentration in raw materials used for manufacturing refractory products By A. A. Fathivand and J. Amidi Cite (62,54 Bq kg-1 respectively) are not higher than in other building materials. The 238U concentration of slud

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natural radioactivity in refractory manufacturing plants and exposure of workers to ionising radiation | request pdf

Natural radioactivity in refractory manufacturing plants and exposure of workers to ionising radiation | Request PDF

Righi et al analyzed zircon sands used in a refractory plant, and they reported the mean radioactivity concentrations of 238 U and 232 Th in raw material zircon sands were 490 and 420 Bq/ kg

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mm naturally occurring radioactive material

MM Naturally Occurring Radioactive Material

Naturally Occurring Radioactive Material (NORM V) All minerals and raw materials contain radionuclides of natural origin, of which the most important for the purposes of radiation protection are the radionuclides in the 238U and 232Th decay

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natural radioactivity in steel slag aggregate naturalna radioaktywnoŚĆ w kruszywie z ŻuŻla stalowniczego

NATURAL RADIOACTIVITY IN STEEL SLAG AGGREGATE NATURALNA RADIOAKTYWNOŚĆ W KRUSZYWIE Z ŻUŻLA STALOWNICZEGO

ty concentrations in common building materials and in-dustrial by-products used for building materials in the EU, Table 1. The radioactivity concentrations found in certain kinds of industrial by-products (fly ash, phos-phogypsum, etc.) can often

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refractory material - an overview | sciencedirect topics

Refractory Material - an overview | ScienceDirect Topics

Refractory Material. Refractories are materials that are resistant to high temperature, used predominantly as furnace linings for elevated temperature materials processing and other applications in which thermomechanical properties are critical.

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determination of elements in refractory clays in bars-1 and bra-7m analyzers

Determination of elements in refractory clays in BARS-1 and BRA-7M analyzers

The accuracy of the x-ray radiometric method of determining the mass fractions of Fe2O3 in refractory clays satisfies the technical requirements (the studies were carried out over the concentration range from 0.8 to 6%).The accuracy of the

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properties of aluminosilicate refractories with synthesized boron-modified tio2 nanocrystals

Properties of Aluminosilicate Refractories with Synthesized Boron-Modified TiO2 Nanocrystals

tion during the raw materials’ mixing stage. Keywords TiO2, Anatase, Boron, Aluminosilicate, Nano‐ crystals, Refractories 1. Introduction Aluminosilicate bricks have been used as refractory in industrial furnaces in constructing and restoring,

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int. journal of refractory metals and hard materials

Int. Journal of Refractory Metals and Hard Materials

Thermodynamic and XRD analysis of reaction behaviors of gangue minerals in roasting mixture of scheelite and calcium carbonate for Ca 3WO 6 preparation Xiaobin Li a, Xiangming Xua, Qiusheng Zhoua

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working with ores containing naturally occurring radioactive materials

Working with Ores Containing Naturally Occurring Radioactive Materials

Occurring Radioactive Materials J Hipkin and P V Shaw NRPB, Northern Centre Hospital Lane, Cookridge, Leeds LS16 6RW, UK Email Peter.Shaw@nrpb.org.uk Introduction A variety of ores and minerals that contain the naturally occurring radioactive ma

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a exposures in industries and p a r m c n -o t r p --- review on enforcement of order of 25 may 2005 on these activities. - asn

A EXPOSURES IN INDUSTRIES AND P A R M C N -O T R P --- Review on enforcement of Order of 25 May 2005 on these activities. - ASN

Enhanced natural radioactivity, review note 24 December 2009 Page 2/86 Abstract Some industrial processes concentrate natural radionuclides contained in the raw materials, co-products or in production wastes. This phenomenon is called “enhanced

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final report summary - refrasort (innovative separation technologies for high grade recycling of refractory waste using non destructive

Final Report Summary - REFRASORT (Innovative Separation Technologies for High Grade Recycling of Refractory Waste using non destructive

Refractory raw materials supply - is there cause for concern? 56th International Colloquium on Refractories, 23-25 September 2013. 5. Hanagiri, S., et al., 2008. Recent Improvement of Recycling Technology for Refractories. Nippon Steel Technical

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draft report - united states environmental protection agency | us epa

Draft Report - United States Environmental Protection Agency | US EPA

A refractory is a material that retains its shape and chemical identity when subjected to high temperatures and is used in applications that require extreme resistance to heat. Specifically, refractories must be able to withstand temperatures

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naturally occurring radioactive materials norm - world nuclear association

Naturally Occurring Radioactive Materials NORM - World Nuclear Association

18/5/2019 · the study of the radioactivity in various building raw materials such as clay, kaolin, red mud, limestone, fly ash, phosphogypsum, etc [1–18]. Due to inherently complex physical, chemical and mineralogical characteristics, clays are used mainly

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phase composition of alumina–mullite–zirconia refractory materials

Phase composition of alumina–mullite–zirconia refractory materials

1/1/2010 · by a nearly constant ZrO 2 content, but Al 2 O 3 and SiO 2 amounts which vary significantly ().In particular, the Al 2 O 3 /SiO 2 ratio ranges from 3 to 6.5, while the weight fraction of coarse-grained alumina (48 mesh) on total alumina raw

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sti/p1289 - iaea

STI/P1289 - IAEA

Raw Materials (IAEA Safety Standards Series No. RS-G-1.6) and Management of Radioactive Waste from the Mining and Milling of Ores (IAEA Safety Standards Series No. WS-G-1.2) provide guidance on the control of exposure of workers and members of

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gamma spectrometric characterization of refractory products used in turkey - nasa/ads

Gamma spectrometric characterization of refractory products used in Turkey - NASA/ADS

Abstract This is the first detailed study related to the radiometric characterization of refractory materials produced for use in the industries of iron-steel, cement and glass manufacturing in Turkey. In this study, the activity concentrations

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norm industries and regulatory considerations

NORM Industries and Regulatory Considerations

• Radiation Protection and NORM Residue Management in the Zircon and Zirconia Industries, Safety Reports Series No. 51, 2007 • Assessing the Need for Radiation Protection Measures in Work Involving Minerals and Raw Materials, Safety Reports

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refractory - wikipedia

Refractory - Wikipedia

Abstract The capacity of the waste treatment plant (WTP) being built at the Hanford Site is not sufficient to process all of the tank waste accumulated from more than 40 years of nuclear materials production. Topics: Heating, Capacity, Waste

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serena righi - academia.edu

Serena Righi - Academia.edu

During the first part of the survey, the concentration of natural radioactivity in raw materials and end-products, coming from four plants, was assessed. Several raw materials and, as a consequence, some end-products as well have shown activity

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clinkerization - cement plant optimization

Clinkerization - Cement Plant Optimization

Raw meal need not be ground as fine as require for kilns carrying calcination duty. Fuels poorer in quality can be burnt. Raw materials high in alkalies and chlorides could also be used. Throughput capacity of kiln increases 5 times. Rotary

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materials | free full-text | effect of hollow corundum microspheres additive on physical and mechanical properties and thermal shock resistance

Materials | Free Full-Text | Effect of Hollow Corundum Microspheres Additive on Physical and Mechanical Properties and Thermal Shock Resistance

22/8/2021 · Therefore, the durability of the lining significantly depends on the thermal shock resistance of refractory materials used in thermal units. The thermal shock resistance of castable depends on many factors: chemical composition, microstructure,

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response surface methodology for optimization of copper leaching from refractory flotation tailings

Response Surface Methodology for Optimization of Copper Leaching from Refractory Flotation Tailings

The raw ore used in this study is a copper oxide from Zambia, Africa. It is characterized by high-oxidation rate, and 85% of particles in this ore are smaller than 0.074 mm. Firstly, the easy-to-recover copper sulfide and free oxidation copper

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pollutant emission factors for the ceramic floor and wall tile industry - tandfonline

Pollutant Emission Factors for the Ceramic Floor and Wall Tile Industry - tandfonline

nature, and use for which the tile is destined.1 Raw Materials Raw materials for ceramic tile production are natural apart from some used in glazes and colors. They are of two kinds: clay and non-clay raw materials. The principal mineral

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aesj-ps013 新 radiation protection of workers who handle naturally occurring radioactive materials 新

AESJ-PS013 新 Radiation Protection of Workers Who Handle Naturally Occurring Radioactive Materials 新

Raw materials for industrial application and radioactive residuals which radioactive concentration is enhanced in physical or chemical process of the plant must be controlled so that the annual dose to workers shall not exceed 1 mSv. Likewise

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11.6 portland cement manufacturing - us epa

11.6 Portland Cement Manufacturing - US EPA

11.6 Portland Cement Manufacturing 11.6.1 Process Description1-7 Portland cement is a fine powder, gray or white in color, that consists of a mixture of hydraulic cement materials comprising primarily calcium silicates, aluminates and

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geopolymer - wikipedia

Geopolymer - Wikipedia

atural radionuclides in raw materials, products, and dust in work sites as well as the 222Rn and 220Rn concentrations in work sites were measured in a monazite processing plant in Japan. Dose estimations for plant workers were also conducted.

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star global conference 2012 amsterdam - mdx

STAR GLOBAL CONFERENCE 2012 AMSTERDAM - MDX

Used with appropriate refractory aggregates, CAC may be used to make refractory castables having applications in the steel and other heat-using industries. The cement is made by fusing together a mixture of a calcium-bearing material (limestone)

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