spinel coated graphite for carbon containing refractory

The 3 International Postgraduates Seminar on Refractories

 · Refractory recycling becomes urgent issue due to the rapid increase of refractory raw materials prices reduced raw materials deposits and regulations related to CO2 emission reduction. Magnesites and graphite which are necessary to produce MgO-C bricks for steel industry are nowadays established as critical for refractory materials market.

Effect of carbon-coated Al O powder on structure and

 · Keywords low-carbon MgO-C composites carbon-coated Al2O3 powder spinel reaction volume stability I. Introduction Graphite which has high thermal conductivity low thermal expansion low elasticity modulusandlow wet-tability by molten slag is one of the important main ingredients for making carbon-containing refractories 1 .

Characteristics of Refractory Castables Containing Mullite

 · The performance of high alumina castables containing mullite and spinel coated graphites was investigated to explore their commercial application in carbon containing refractory composites. It was compared in terms of thermal shock resistance refractoriness under load static slag resistance test pore size distribution and physical properties e.g. apparent porosity and cold crushing strength.

Carbon-containing refractoryShinagawa Refractories Co

The carbon-containing refractory of the present invention comprises 3 to 30 parts by weight of graphite 70 to 97 parts by weight of refractory raw materials 1 to 7 parts by weight of metal powder the metal powder comprising at least one metal selected from the group consisting of Al Si Fe and Ni and 0.3 to 5 parts by weight of boron carbide.

Carbon BrickRongsheng Refractory Company

Carbon Bricks Manufacturing Process. Production process of carbon brick is almost the same as that of the other refractory brick with the sintering temperature at 1300 1450 ℃ holding time about 20 hours the total firing time 240 420 hours and drawing at 40 60 ℃.But the calcination of the raw material and firing and products must at the reducing atmosphere to prevent carbon from

The use of graphite in the refractory industry

» Ladle treatment Large-shaped carbon and graphite blocks are installed as lining in the lower part of a blast furnace. » In alumina production the lining of the electrolysis tank is out of carbon and graphite bricks which are rammed with carbon ramming mixes. »

Spinel-Coated Graphite for Carbon Containing

Spinel-Coated Graphite for Carbon Containing Refractory Castables Abstract Oxidation resistance and water wettability of graphite flakes have been improved by a thin sol–gel film of magnesium aluminate spinel (MgAl2O4) over its surface.

Carbon-containing refractoryShinagawa Refractories Co

2. A carbon-containing refractory composition according to claim 1 wherein the refractory aggregate consists of oxides or non-oxides. 3. A carbon-containing refractory composition according to claim 2 wherein the oxides are at least one oxide selected from the group consisting of magnesia spinel silica zircon dolomite and alumina. 4.

Dissolution Behavior of Mg from MgO–C Refractory in Al

tory containing 20 mass of carbon on the formation rate of spinel inclusions. They concluded that carbon reduction of MgO was the primary mechanism of the Mg supply. However Harada et al.30) observed that Al in the steel melt reduced the MgO in the refractory and Mg was dissolved into the steel melt. According to this mechanism MgO in the

Nanotechnology in castable refractoryایران مواد

 · nanosized carbon powders 37 38 nanofibres 39 graphite oxide To improve water wettability the surface of graphite coated with oxidessuchasAl 2O 3 TiO 2 etc.Al 2O porosity of the spinel containing castables was higher than that of mullite(M)containingcastables.Spinel(S)containingcastableswere

Spinel refractories carbon bondrussianpatents

The closest in composition to the proposed spinalstenosis the refractories carbon bundle is refractory materials which is prepared from a mixture of the following composition wt. spinel material42-75 pricetadalafil component 15-40 carbon-containing material preferably graphite10-18 organic binder4-8

Thermomechanical and thermophysical characteristics of

 · The present work steps forward to explore and asses further the characteristics of a high alumina based unshaped refractory containing the coated graphite as the carbon source. It is well known that these carbon-alumina refractories are heterogeneous composites that comprise of cement fines micronized ceramic powders antioxidants and deflocculants aside from the prefired aggregates and carbon

Characteristics of Refractory Castables Containing Mullite

 · The performance of high alumina castables containing mullite and spinel coated graphites was investigated to explore their commercial application in carbon containing refractory composites. It was compared in terms of thermal shock resistance refractoriness under load static slag resistance test pore size distribution and physical properties e.g. apparent porosity and cold crushing strength.

Carbon-containing refractoryShinagawa Refractories Co

2. A carbon-containing refractory composition according to claim 1 wherein the refractory aggregate consists of oxides or non-oxides. 3. A carbon-containing refractory composition according to claim 2 wherein the oxides are at least one oxide selected from the group consisting of magnesia spinel silica zircon dolomite and alumina. 4.

Carbon-containing refractoryShinagawa Refractories Co

The carbon-containing refractory of the present invention comprises 3 to 30 parts by weight of graphite 70 to 97 parts by weight of refractory raw materials 1 to 7 parts by weight of metal powder the metal powder comprising at least one metal selected from the group consisting of Al Si Fe and Ni and 0.3 to 5 parts by weight of boron carbide.

Spinel refractories carbon bondrussianpatents

The closest in composition to the proposed spinalstenosis the refractories carbon bundle is refractory materials which is prepared from a mixture of the following composition wt. spinel material42-75. pricetadalafil component 15-40. carbon-containing material preferably graphite10-18. organic binder

Investigations on the properties of Al2O3–MgO refractory

 · In situ carbon containing calcium aluminate cement (CCAC) was ground and used as binders for Al 2 O 3 –MgO refractory castables and its carbon content determined by an infrared carbon–sulfur analyzer (HCS-140) was 1.45 . For comparison Secar71 (supplied by Kerneos China) S71CB (prepared by mechanical mixing with carbon black and Secar71) composite powders with a carbon

Carbon transfer from magnesia-graphite ladle refractories

 · Carbon in the form of graphite is often added to refractories to increase the slag corrosion resistance and thermal shock resistance of the refractory. 1 4 5 6 7 8. Carbon-containing refractories will often be the most economical and long-lasting option due to these important properties. Therefore ultra-low carbon steel heats are often

Improved sol gel spinel (MgAl 2 O 4 ) coatings on graphite

 · X-ray photoelectron spectroscopy was performed to substantiate the elemental composition of spinel film over graphite. Oxidation resistance and water-wettability of coated graphite were examined respectively by thermogravimetry analysis and moisture requirement during installation of a carbon containing refractory castable composition.

The 3 International Postgraduates Seminar on Refractories

 · Refractory recycling becomes urgent issue due to the rapid increase of refractory raw materials prices reduced raw materials deposits and regulations related to CO2 emission reduction. Magnesites and graphite which are necessary to produce MgO-C bricks for steel industry are nowadays established as critical for refractory materials market.

Refractory Products and Monolithics HWI

A dual-carbon system Mag-Carbon ladle slag line brick for applications with severe vertical cracking. English CS-TECH THOR 30-ST English WM-7977 A dual-carbon system Mag-Carbon ladle barrel brick for applications with severe vertical cracking. English GREENCAST®-92S GR PLUS High purity spinel containing gun mix English VERSAFLOW 45

Improvement of Rheological Characteristics of Carbon

 · Sunanda Mukhopadhyay Sarbasree Dutta Sheikh A. Ansar Sumita Das Susmita Mishra "Spinel — Coated Graphite for Carbon Containing Refractory Castables " J. Am. Ceram. Soc. 92(8) (2009). https //doi/10.1111/j..2009.03133.x. 5.

Spinel refractories carbon bondrussianpatents

The closest in composition to the proposed spinalstenosis the refractories carbon bundle is refractory materials which is prepared from a mixture of the following composition wt. spinel material42-75. pricetadalafil component 15-40. carbon-containing material preferably graphite10-18. organic binder

Next Generation Carbon-Containing Refractory Composites

Carbon-containing refractory bricks are used extensively in the steel industry worldwide. Since the first generation became commercially available in the 1970 s their processing microstructures and properties have been improved dramatically and the service lives of industrial furnaces have thus been extended substantially. In addition to the work on carboncontaining refractory bricks

USACarbon-containing refractoryGoogle Patents

The present invention provides a carbon-containing refractory composition characterized by containing 0.1-10 parts by weight of silicon hexaboride in 100 parts by weight of refractory material comprising 3-95 parts by weight of carbonaceous material such as graphite and 97-5 parts by weight of refractory aggregate. In the carbon-containing refractory composition of the present invention

Wear Mechanisms of Carbon-Based Refractory Materials

 · are typically installed as tap-hole refractory in these furnaces carbon block and cold ramming paste. 6 7 Carbon bricks or blocks are produced from aggregate (electrically or gas calcined anthracite calcined coal petroleum coke carbon black artificial graphite or combinations of these) and binder (petroleum pitch or coal tar).

EPA1A carbon-containing refractoryGoogle

The refractory e.g. an Al 2 O 3 -C MgO-C or MgO-AI 2 0 3 -C refractory is provided with excellent oxidation resistance and hot strength by including both boron carbide and powder comprising at least one of Al Si Fe and Ni. The refractory comprises by weight 3 to 30 parts of graphite 79 to 97 parts of refractory raw materials 1 to 7 parts of the said powder and 0.3 to 5 parts of

Oxidation resistance and wettability of graphite/SiC

 · All these features lead to carbon-containing refractory the oxidation weight losses of spinel and mullite coated graphite at 1200°C were obviously decreased to 22 and 29.7 respectively. Meanwhile the water wettability of coated .

Investigations on the properties of Al2O3–MgO refractory

 · In situ carbon containing calcium aluminate cement (CCAC) was ground and used as binders for Al 2 O 3 –MgO refractory castables and its carbon content determined by an infrared carbon–sulfur analyzer (HCS-140) was 1.45 . For comparison Secar71 (supplied by Kerneos China) S71CB (prepared by mechanical mixing with carbon black and Secar71) composite powders with a carbon

Refractory Products and Monolithics HWI

A dual-carbon system Mag-Carbon ladle slag line brick for applications with severe vertical cracking. English CS-TECH THOR 30-ST English WM-7977 A dual-carbon system Mag-Carbon ladle barrel brick for applications with severe vertical cracking. English GREENCAST®-92S GR PLUS High purity spinel containing gun mix English VERSAFLOW 45

UNIVERSITY OF CALCUTTA

 · 7. Spinel-Coated Graphite for Carbon Containing Refractory Castables Journal of the American Ceramic Society. 92(8)(2009) 8. Improved sol gel spinel ( MgAl 2 O 4) coatings on graphite for application in carbon containing high alumina

Carbon Containing Castables and More Scientific.Net

Next Generation of carbon-containing refractory composite. Industrial Ceramics 2007 27 (1) 1520. 16 Marzban R Nemati Z A Otroj S Sagadi N The Influence of nano-alumina particles on the self-flow characteristics of alumina-spinel self-flowing castables UNITECR 2007 Dresden Germany .

Dissolution Behavior of Mg from MgO–C Refractory in Al

tory containing 20 mass of carbon on the formation rate of spinel inclusions. They concluded that carbon reduction of MgO was the primary mechanism of the Mg supply. However Harada et al.30) observed that Al in the steel melt reduced the MgO in the refractory and Mg was dissolved into the steel melt. According to this mechanism MgO in the