The use of enriched Kimpersaisk chromite for producing ...

Enriched Kimpersaisk chromite in the composition of magnesite-chromite refractories satisfactorily sinters at temperatures of firing of 1650–1730°C and produces dense refractories with an apparent porosity of 12–13%.The periclase-spinel refractories made from enriched Kimpersaisk chromite is characterized by high quality factors, such as apparent porosity 10–12%, compressive strength ...

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Identification of magnesia–chromite refractory

2016-7-1  Primary chromite is abundantly present as crystals with a diameter of about 100–500 μm. Part of them contain (Cr, Fe, Al) x O y precipitates. The observed porosity is relatively high, which is in agreement with the reported apparent porosity of 16.5%.

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Magnesia Chromite Brick(KROMAG) - Marvels Refractories ...

The apparent porosity will be decreased to about 5.0%, while the bulk density and the cold crushing strength will increase by about 0.05g/cm 3 and 30MPa, respectively. It is mainly made from fused mag-chrome, magnesia and chrome ore, pressed under high

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rotary dryer for chrome ore - sanda-massagen.ch

rotary dryer for chromium and chromite. rotary dryer for chromium and chromite what is the % apparent porosity for chromite. rotary dryer for chromium and chromite chromite ore crusher machine and chrome ore beneficiation plant chrome is the value ore because of high corrosion . Get Price + sodium based bentonite drying in rotary dryer . More

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Magnesite Chromite Refractory PDF Refractory

2019-10-17  • The apparent porosity of chrom-magnesite refractories after firing at 1350ºC for 5 hours should be about 24% however, it generally varies from 22 to 26%. Denser refractories can also be made but usually this much porosity is allowed particularly to avoid roof failures due to increased load.

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Study on the Analysis of Chromite Refractory Brick from ...

The apparent specific gravity of chromite brick was 4.08and the standard was 3.8 to 4.0.The porosity of chromite brick is about 24.29 percent and the standard is 14 percent. Therefore, the apparent porosity of chromite brick is more than the standard, this is because of

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Chromite Deposits - an overview ScienceDirect Topics

Chromite. Chromium from ores of chromite is used to make essential stainless steel, tool steel, armor-piercing projectiles, and is used in other high-temperature applications. It is a strategic metal to the USA, because since 1961, the U.S has been 100 percent dependent upon other nations for chromium.

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Magnesite-Chromite Refractories Article about Magnesite ...

Magnesite-chromite refractories exhibit the following properties: apparent density, 3,000-3,300 kg/m 3; open porosity, 14-20 percent; compressive strength, 40-60 MN/m2 (400-600 kgf/ cm2); temperature at onset of deformation under a load of 200 kilonewtons (kN) per sq m (2 kgf/cm2), 1500°-1630°C; and heat resistance, in excess of 6-10 thermal ...

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Thermodynamics Study on the Decomposition of

The decomposition of chromite ore in the system is a typical process of solid– liquid–gas reaction, which is coordinately controlled by mass diffusion in product layer and interface reaction ...

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Refractory Bricks Fire Bricks Types Of Refractory ...

2021-9-8  Chromite Bricks: Chromite brick is prepared from fire clay comprising 50% of chrome iron ore, 30% iron oxide (Ferrous oxide), and 20% bauxite with tiny silica. It resists temperature up to 2000℃. Carborundum: Carborundum is a unique variety of natural refractory bricks. It can be made from fire clay including a greater percentage of silicon ...

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Magnesia Chromite Brick(KROMAG) - Marvels Refractories ...

The apparent porosity will be decreased to about 5.0%, while the bulk density and the cold crushing strength will increase by about 0.05g/cm 3 and 30MPa, respectively. It is mainly made from fused mag-chrome, magnesia and chrome ore, pressed under high

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MCE - FUSED MAGNESIA CHROMITE SPINEL

2013-7-31  Apparent Porosity: 4.0% Apparent Specific Density: 3.66 g/cm3 App. Porosity App. Specific Density by ASTM C 20-00 AVAILABLE SIZES Contact sales for available sizes . Author: Brian Hauer Created Date:

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Magnesite Chromite Refractory PDF Refractory

2019-10-17  • The apparent porosity of chrom-magnesite refractories after firing at 1350ºC for 5 hours should be about 24% however, it generally varies from 22 to 26%. Denser refractories can also be made but usually this much porosity is allowed particularly to avoid roof failures due to increased load.

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Magnesite-Chromite Refractories Article about Magnesite ...

Magnesite-chromite refractories exhibit the following properties: apparent density, 3,000-3,300 kg/m 3; open porosity, 14-20 percent; compressive strength, 40-60 MN/m2 (400-600 kgf/ cm2); temperature at onset of deformation under a load of 200 kilonewtons (kN) per sq m (2 kgf/cm2), 1500°-1630°C; and heat resistance, in excess of 6-10 thermal ...

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Use of sonic control methods for refractories SpringerLink

We developed and introduced a sonic method for determining the apparent density, porosity, and compressive strength of magnesite-chromite, chromemagnesite, and chamotte (fireclay) refractories.A method is discussed for mass control of steel-casting plugs based on the IChMK apparatus.

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SYNTHESIS AND SINTERING BEHAVIOR OF THE

2015-3-30  Lanthanum Chromite has been the main candidate as interconnect material for high temperature fuel cell applications, SOFC. So all researches on the direction to clarify some aspects of this material continue to be an interesting contribution to understand and modify the behavior of the Lanthanum Chromite in use.

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Petrology, mineralogy, porosity, and cosmic‐ray

Petrology, mineralogy, porosity, and cosmic-ray exposure history of Huaxi ordinary chondrite Shijie LI1, Shijie WANG2,*, Ingo LEYA3, Yang LI1, Xiongyao LI1, and Thomas SMITH3 1Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy

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Wear of magnesia-chrome refractory bricks as a function

2016-10-31  The chromite content of the UG2 ore presents a major challenge for the PGM smelting process as high levels of chromium increase the slag liquidus temperature, which necessitates higher operating temperatures. If, under non-reducing conditions, the Cr2O3 content of the concentrate exceeds approxi-mately 1.8% the chromite spinels do not

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Laboratory Investigations of the Electrical Resistivity of ...

2016-2-15  Porosity of coke (ASTM D 167-93) The porosity is calculated from the apparent and true gravities of the coke as follows: true specific gravity 100 (apparent specific gravity) Total Porosity 100 x = − [2] Apparent Porosity % W Wi −W = [3] where W = weight of dry coke, Wi = weight of wet coke. The results are presented in Table V.

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A basic guide to particle characterization

2015-6-11  • packing density and porosity e.g. ceramics. Measuring particle size and understanding how it affects your products and processes can be critical to the success of many manufacturing businesses. How do we define particle size? WHITEPAPER 3 A basic guide to particle characterization

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Magnesia Chromite Brick(KROMAG) - Marvels Refractories ...

The apparent porosity will be decreased to about 5.0%, while the bulk density and the cold crushing strength will increase by about 0.05g/cm 3 and 30MPa, respectively. It is mainly made from fused mag-chrome, magnesia and chrome ore, pressed under high

Get Price

MCE - FUSED MAGNESIA CHROMITE SPINEL

2013-7-31  Apparent Porosity: 4.0% Apparent Specific Density: 3.66 g/cm3 App. Porosity App. Specific Density by ASTM C 20-00 AVAILABLE SIZES Contact sales for available sizes . Author: Brian Hauer Created Date:

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Factors Limiting the Apparent Hydrogen Flux in

2020-3-5  Factors Limiting the Apparent Hydrogen Flux in Asymmetric Tubular Cercer Membranes Based on ... lanthanum chromite 1. Introduction ... and ˚g is the porosity of the support. The gas-phase density is determined from the equation of state as:

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SYNTHESIS AND SINTERING BEHAVIOR OF THE

2015-3-30  Lanthanum Chromite has been the main candidate as interconnect material for high temperature fuel cell applications, SOFC. So all researches on the direction to clarify some aspects of this material continue to be an interesting contribution to understand and modify the behavior of the Lanthanum Chromite in use.

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11.5 Refractory Manufacturing

2015-9-10  (chromite-magnesite), magnesia-chrome, and chrome-alumina. Chromium compounds are emitted from the ore crushing, grinding, material drying and storage, and brick firing and finishing processes used in producing these types of refractories. Tables 11.5

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Working Properties of Some Selected Refractory Clay ...

2013-12-24  The apparent porosity of all the batch specimens was found to be high as well as the bulk densities, while the shrinkage of all the specimens were low. It was concluded that 100% Ara 2, and a blend of Ara 1 and 2 in equal proportions, are most

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A basic guide to particle characterization

2015-6-11  • packing density and porosity e.g. ceramics. Measuring particle size and understanding how it affects your products and processes can be critical to the success of many manufacturing businesses. How do we define particle size? WHITEPAPER 3 A basic guide to particle characterization

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Chromite ore beneficiation - Idaho Research Foundation, Inc.

The chromite ore is pulverized and preferably mixed with sodium sulfate. Ammonium carbonate can also be added for subsequent vaporization to increase porosity. Sulphur oxide-oxygen roasting of the chromite ore is conducted at elevated temperatures in the approximate range between 300° and 1,000° C. or higher at approximately atmospheric ...

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Laboratory Investigations of the Electrical Resistivity of ...

2016-2-15  Porosity of coke (ASTM D 167-93) The porosity is calculated from the apparent and true gravities of the coke as follows: true specific gravity 100 (apparent specific gravity) Total Porosity 100 x = − [2] Apparent Porosity % W Wi −W = [3] where W = weight of dry coke, Wi = weight of wet coke. The results are presented in Table V.

Get Price

Petrology, mineralogy, porosity, and cosmic‐ray

Petrology, mineralogy, porosity, and cosmic-ray exposure history of Huaxi ordinary chondrite Shijie LI1, Shijie WANG2,*, Ingo LEYA3, Yang LI1, Xiongyao LI1, and Thomas SMITH3 1Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy

Get Price