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production of acidic refractory materials examples

  • HOW TO CLASSIFY REFRACTORY MATERIALS - idc

    2015-1-7 · Accordingly the refractory materials are of three classes 1. Acid Refractories: are those which are attacked by alkalis (basic slags). These are used in …

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  • Classification of Refractories - cnfqrefractory.com

    2020-4-30 · These are used in areas where slags and atmosphere are either acidic or basic and are chemically stable to both acids and bases. The main raw materials belongs to, but not confined to, R 2 O 3 group. The common examples of these materials are alumina (Al …

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  • Lecture 14: Refractory Materials - NPTEL

    2017-8-4 · What is a refractory and why is it required? Refractory is a material which can withstand high temperature and does not fuse. Examples are: fireclay, alumina, magnesite, chrome magnesite, dolomite etc. Refractory materials are produced to meet the diversified Requirements of high …

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  • Refractories and Classification of Refractories –

    2017-4-30 · Special refractories are expensive refractory materials which have been manufactured using synthetic (fused sintered) grains free from impurities, under highly controlled production parameters. They are used for special purposes like – construction of crucible, some parts of furnaces and, research and development purposes etc. where the ...

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  • Introduction to Refractories – IspatGuru

    2013-9-28 · Introduction to Refractories. satyendra; September 28, 2013; 1 Comment ; acidic, alumina, basic, fireclay, PCE, refractories, silica,; Introduction to Refractories. Refractories are defined in ASTM C71 as non metallic materials having those chemical and physical properties that make them applicable for structures or as components of systems that are exposed to environments above 538 deg C ...

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  • Technical Review UDC 666 . 76 Development of

    2012-12-7 · steel production by continuously reviewing and improving the de-velopment, selection, installation, maintenance and disposal of refractory materials with the perspective of a major user. As a result of its development of refractory technology (see Fig. 1), the unit refractory consumption of the company decreased by about 40% over the last 30 years.

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  • Refractory Metals | MetalTek

    2020-11-24 · Tungsten (originally named Wolfram thus the element symbol “W”) has the highest density and highest melting point of all metals and is the most plentiful of the refractory metals. It is often used where high temperatures are present, strength is necessary and high density is not an issue. Chances are you experience the high-temperature properties of tungsten whenever you turn on your ...

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  • BLOG

    Refractory means inorganic, non-metallic and homogeneous materials which can withstand high temperatures. These are some of the materials used in refractory production: silicon oxide, aluminum, magnesium, calcium, and zirconium. Carbides, nitrides, borides and silicates also can be …

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  • Recent Advancement in monolithic refractories via ...

    2021-6-1 · materials in which at least on constituent must be in nano-scale. In the field of advanced materials both terms are being employed to develop new generation of advanced materials and composites. One of the sub-groups of advanced materials is refractory materials used in different industries [8-10]. Refractories

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  • Refractory materials - Mohammad Nurunnabi

    2016-2-10 · A refractory material is one that retains its strength at high temperatures. ASTM C71 defines refractories as 'non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)'.

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  • (PDF) Recycling Of Ceramic Refractory Materials

    The disposal of refractory materials has become a major problem for metal producers. Ceramic furnace tubes are quite costly, yet they are prone to cracking and wear due to chemical reactions and ...

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  • Refractory products are essential for the production of ...

    2017-11-30 · Refractory products provide ample protection against corrosion and thermal insulation. They are a source of mechanical strength for furnaces, reactors and other processing units. Refractory products are essential for the production of iron or iron making, cement, ceramics, glass, petrochemical power and more.

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  • Refractory Material Testing - Lab Testing Services for ...

    2020-3-5 · Refractory materials are basically inorganic non-metallic substances which are composed of thermally stable mineral aggregates, a binder phase, and additives. Refractory substances are supposed to be able to withstand the varying degrees of severity in terms of exposure to abrasive and corrosive solids, liquids, or gases at extremely high ...

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  • Technical Review UDC 666 . 76 Development of

    2012-12-7 · steel production by continuously reviewing and improving the de-velopment, selection, installation, maintenance and disposal of refractory materials with the perspective of a major user. As a result of its development of refractory technology (see Fig. 1), the unit refractory consumption of the company decreased by about 40% over the last 30 years.

    Get Price
  • Recycling of refractory bricks used in basic

    2019-1-1 · Refractory production is strongly dependent on high quality raw materials, many of which are becoming increasingly difficult to come by, and prices are rising. Meanwhile, up to 28 million tons of spent refractories are generated each year, of which only a small fraction is recycled in refractories.

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  • Refractory Metals | MetalTek

    2020-11-24 · Tungsten (originally named Wolfram thus the element symbol “W”) has the highest density and highest melting point of all metals and is the most plentiful of the refractory metals. It is often used where high temperatures are present, strength is necessary and high density is not an issue. Chances are you experience the high-temperature properties of tungsten whenever you turn on your ...

    Get Price
  • BLOG

    Refractory means inorganic, non-metallic and homogeneous materials which can withstand high temperatures. These are some of the materials used in refractory production: silicon oxide, aluminum, magnesium, calcium, and zirconium. Carbides, nitrides, borides and silicates also can be …

    Get Price
  • Refractories | Refractory | Building Materials

    2019-4-13 · 2Some Common aefractories A refractory material is one that retains its strength and do not fuse at high temperatures. ASTM defines refractories as 'non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K ...

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  • A comparative study between Direct Spinel Addition and

    2014-7-15 · Examples of some binders of this type include phosphoric acid or phosphates, sodium silicate or potassium silicate and phenolic resin with hardener. Chemical binders are mainly used in refractory castables when hardener is added but are used in ramming refractories, plastic refractories and refractory coatings when no hardener is added.

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  • Pozzolans - an overview | ScienceDirect Topics

    V. Sudarsan, in Materials Under Extreme Conditions, 2017 13 Pozzolans. Pozzolans are a different type of refractory materials. They are naturally available and consist of very fine particles of siliceous and aluminous materials that in presence of water react with Ca(OH) 2 to form cementitious materials [7].The extent of pozzolanic activity is measured with respect to the extent of reactivity ...

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  • High temperature resistant molding materials -

    Improved high temperature resistant molding materials containing customary filler materials and additives and a carbon forming bonding agent which is a phenol novolac with a molar ratio of phenol to formaldehyde of 1 to 0.2 to 1 to 0.35 of high quality and free of solvents useful as refractory products, carbon materials, abrasive wheels, friction lining and the like.

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  • Recent Advancement in monolithic refractories via ...

    2021-6-1 · materials in which at least on constituent must be in nano-scale. In the field of advanced materials both terms are being employed to develop new generation of advanced materials and composites. One of the sub-groups of advanced materials is refractory materials used in different industries [8-10]. Refractories

    Get Price
  • An Index of Refractory Organics - EPA

    Examples of such materials include chlorinated phenols and biphenols, pesticides, mer- curic organic complexes and materials found in runoff waters such as humic acids and motor oils (9) (23) (45). Although the impact of refractory sub- stances is not completely understood, such properties as color, taste and odor have been found characteristic ...

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  • Refractory - WikiMili, The Free Encyclopedia

    2019-8-10 · Refractory bricks in a torpedo car used for hauling molten iron. A refractory material or refractory is a heat-resistant material: that is, a mineral that is resistant to decomposition by heat, pressure, or chemical attack, most commonly applied to a mineral that retains strength and form at high temperatures. [1].

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  • Pozzolans - an overview | ScienceDirect Topics

    V. Sudarsan, in Materials Under Extreme Conditions, 2017 13 Pozzolans. Pozzolans are a different type of refractory materials. They are naturally available and consist of very fine particles of siliceous and aluminous materials that in presence of water react with Ca(OH) 2 to form cementitious materials [7].The extent of pozzolanic activity is measured with respect to the extent of reactivity ...

    Get Price
  • Introductio to Refactory and Insulating Material.pdf ...

    View Introductio to Refactory and Insulating Material.pdf from METALLURGY 123 at University of Science and Technology Beijing. INTRODUCTION TO REFRACTORY AND INSULATING MATERIALS ZONES OF BLAST

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  • United States Industrial Refractory Materials Market

    2017-6-30 · New report on United States Industrial Refractory Materials market 2017 industry trend and forecast 2022 added to orbisresearch.com store which has 115 pages and available for purchase at us …

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  • METALLURGICAL USES FLUXES FOR METALLURGY

    2016-3-4 · Some flux materials are added to repair smelting and refining vessel refractory linings. The selection of the flux to be added depends on the type of process and type of refractory. In the basic oxygen process for steel, lime from the flux combines with silica formed by oxidation of silicon from the metal to form a slag. The

    Get Price
  • Industrial applications - K+S Aktiengesellschaft

    2021-5-28 · Extracting valuable raw materials from the depths to the surface - this is only the beginning. We also offer the right solutions for the rest of the way to the customer. Thanks to our many years of experience in logistics and our production facilities on several continents, we …

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  • The lining of the rotary kiln - russianpatents.com

    Alternating acidic and basic refractories in longitudinal rows is carried out at a ratio of 1:(-3), where L is the length of the rotary kiln, m; D - diameter rotary kiln, m, and L/D ratio is equal to or more than 21. Obtained by calculating the ratio of acidic and basic refractories is rounded to an integer. 2 Il., 3 table.

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  • 50+ Types of Bricks in the Construction | Classification ...

    2019-6-29 · These are acidic in nature. Their raw materials are pure quartz (SiO2), or sandstone of high silica content. The moulded units are burnt at about 1500 Centigrade. They are extensively used in Bessemer converter as lining material because, slag in that case, is acidic in nature.

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  • What Are Refractories - The Refractories Institute (TRI)

    Then, there are refractory ceramic fibers, which resemble residential insulation, but insulate at much higher temperatures. Bricks and shapes are the more traditional form of refractories and historically have accounted for the majority of refractory production. Refractories come in all shapes and sizes.

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  • Recent Advancement in monolithic refractories via ...

    2021-6-1 · materials in which at least on constituent must be in nano-scale. In the field of advanced materials both terms are being employed to develop new generation of advanced materials and composites. One of the sub-groups of advanced materials is refractory materials used in different industries [8-10]. Refractories

    Get Price
  • Industrial Minerals Networking | IMFORMED –

    2015-9-22 · Refractory minerals maybe classified into basic, acidic, specialised, and insulating categories, but each mineral will have is own supply chain characteristics. This was the subject of the UNITECR 2015 presentation by Mike O’Driscoll, Director, IMFORMED – “Minerals Matter: Refractory Raw Material Supply Trends & Developments ...

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  • Refractory materials - Mohammad Nurunnabi

    2016-2-10 · A refractory material is one that retains its strength at high temperatures. ASTM C71 defines refractories as 'non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)'.

    Get Price
  • United States Industrial Refractory Materials Market

    2017-6-30 · New report on United States Industrial Refractory Materials market 2017 industry trend and forecast 2022 added to orbisresearch.com store which has 115 pages and available for purchase at us …

    Get Price
  • Cement rotary kiln questions & answers

    2015-1-7 · Accordingly the refractory materials are of three classes 1. Acid Refractories: are those which are attacked by alkalis (basic slags). These are used in areas where slag and atmosphere are acidic. Silica refractories (greater than 92% SiO2) and siliceous refractories (78% to 92% SiO2) are examples of acid refractories. 2.

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  • METALLURGICAL USES FLUXES FOR METALLURGY

    2016-3-4 · Some flux materials are added to repair smelting and refining vessel refractory linings. The selection of the flux to be added depends on the type of process and type of refractory. In the basic oxygen process for steel, lime from the flux combines with silica formed by oxidation of silicon from the metal to form a slag. The

    Get Price
  • Industrial applications - K+S Aktiengesellschaft

    2021-5-28 · Extracting valuable raw materials from the depths to the surface - this is only the beginning. We also offer the right solutions for the rest of the way to the customer. Thanks to our many years of experience in logistics and our production facilities on several continents, we …

    Get Price
  • Corrosion selection of materials

    2021-3-24 · Materials of construction for ammonia are dependent on the operating temperature. Whilst mild steel may be used at ambient temperature special steels are required at low temperatures to avoid embrittlement. Impurities in liquid ammonia such as air or carbon dioxide can cause stress corrosion cracking of mild steel.

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  • 50+ Types of Bricks in the Construction | Classification ...

    2019-6-29 · These are acidic in nature. Their raw materials are pure quartz (SiO2), or sandstone of high silica content. The moulded units are burnt at about 1500 Centigrade. They are extensively used in Bessemer converter as lining material because, slag in that case, is acidic in nature.

    Get Price
  • OCCASION - UNIDO

    The refractory materials of commerce are mostly confined to naturally- ... is an acidic refractory capable of resisting iron oxide and similar duets. Alumina and alumino-silicates ... excellent examples are also being used for apecialist applications.

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  • LOW CHROME/CHROME FREE REFRACTORIES FOR

    2019-7-28 · refractory materials and their interaction with slags, c) the high cost associated with refractory materials containing high Cr. 2. O. 3. content, and d) possible long-term domestic supply issues. To address these and other concerns, this research project will investigate and develop low-chrome/no-chrome oxide liner materials for use in ...

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  • Nigerian Clay Deposits for use as Refractory Materials

    2020-6-23 · Nigerian Clay Deposits for use as Refractory Materials in Metallurgical Industries - A Review - written by M. M Dansarai , M. A Bawa , A. Tokan published on 2020/06/23 download full article with reference data and citations

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  • Refractory materials - Mohammad Nurunnabi

    2016-2-10 · A refractory material is one that retains its strength at high temperatures. ASTM C71 defines refractories as 'non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)'.

    Get Price
  • The Selection of Refractory Material of a Rotary Kiln ...

    2013-11-5 · The steel industry accounts for 70% of the amount of refractory. The main purpose of the rotary kiln using refractory is for high temperature resistance, wear resistance and corrosion resistance, thermal equipment, steel structure and protect the good condition, provide good working conditions, there are many available monolithic refractories for cement rotary kiln.The steel industry accounts ...

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  • How hot repair of the lining or for refractory products ...

    Examples of highly resistant refractory materials are chromomagnetic, magnesite-alumina, chrome-alumina, magnesite-chrome refractory materials based on chromium and magnesite, highly active aluminum oxide and refractory materials with a fairly high content of Zirconia, for example Corhart (trade name) Zac (an alloy of aluminum oxide, zirconias ...

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  • Cement rotary kiln questions & answers

    2015-1-7 · Accordingly the refractory materials are of three classes 1. Acid Refractories: are those which are attacked by alkalis (basic slags). These are used in areas where slag and atmosphere are acidic. Silica refractories (greater than 92% SiO2) and siliceous refractories (78% to 92% SiO2) are examples of acid refractories. 2.

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  • Experience from the use of modern unmolded

    2012-7-6 · Joint development and industrial tests of a new generation of Termoset exothermic unmolded materials and MMTF gunning bodies are conducted. It is established that with the use of the general-purpose Termoset exothermic refractory compound the time needed for repairs to heating units may be reduced and the quality of the repairs improved, durability increased, the service stability of the ...

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  • Toward electrochemical synthesis of cement—An

    2020-6-9 · Cement production is currently the largest single industrial emitter of CO2, accounting for ∼8% (2.8 Gtons/y) of global CO2 emissions. Deep decarbonization of cement manufacturing will require remediation of both the CO2 emissions due to the decomposition of CaCO3 to CaO and that due to combustion of fossil fuels (primarily coal) in calcining (∼900 °C) and sintering (∼1,450 °C). Here ...

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  • Natural Graphites - Durrans Group

    Typical examples are in the growing fields of Expandable Graphites, the use of Natural Graphites in Friction materials and the Refractory Industry were specific surface area materials are critical in high temperature applications such as Isostatic Graphite tube manufacture. Custom grades are …

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