what is the apparent porosity for chromite

Sep 16, 2019· 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 non-uniform size distribution and inhomogeneity.

To produce chromite refractory brick, it is pressed under a press of 400 tons, dried and fired at 1580˚C for fifty two hours. Then, the standard properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk density and water absorption that the chromite …

Study on the Production of Chromite Refractory Brick from Local ... properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk ... Keywords—chemical analysis, chromite ore, chromite refractory. Read More

what is the apparent porosity for chromite. what is the apparent porosity for chromite What Is The Apparent Porosity For Chromite - trituradora, What Is The Apparent Porosity For Chromite Shanghai XSM dedica a la investigación y desarrollo, producción y venta …

Due to the Kirkendall effect from the diffusion of Fe 2+ to the surrounding chromite grains, plenty of voids formed among the latter grains . As a consequence, the apparent porosity of magnesia chromite brick increased and the strength decreased significantly. The increment on apparent porosity may raise the risk of slag corrosion and penetration.

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%.

The bulk density and apparent porosity values of five specimens from each composition were measured using the standard water immersion method, and average values were taken. The

Chromite Ore Beneficiation Process or Chrome Ore Mining Process means Extraction of Chromium from Chromite Ore and the gravity concentration solution has been proven that it is a cost effective solution for chromite ore process there are many mineral separators which can be used for chromite ore beneficiation process such as jig machine rotary ...

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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Study on the Production of Chromite Refractory Brick from Local ... properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk ... Keywords—chemical analysis, chromite ore, chromite refractory. Read More

Due to the Kirkendall effect from the diffusion of Fe 2+ to the surrounding chromite grains, plenty of voids formed among the latter grains . As a consequence, the apparent porosity of magnesia chromite brick increased and the strength decreased significantly. The increment on apparent porosity may raise the risk of slag corrosion and penetration.

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%.

The bulk density and apparent porosity values of five specimens from each composition were measured using the standard water immersion method, and average values were taken. The

The calculated porosities of the different samples correspond well with the experimental apparent porosity values. Both theoretical and measured density and porosity data indicated that TiO 2 addition to the chromite-magnesia brick did not result in a significant densification of the brick.

chromite ores. For example, assuming that a chromitite ore consists essentially of chromite with density of approximately 4.5 g/mL and pyroxene with density around 3.3 g/mL, it should be possible to estimate bulk density based on XRF ‘whole rock’ analyses. A further example may be impure barite ore, in which

Properties such as cold crushing strength apparent porosity apparent specific gravity . chromite ore is one and is used for testing in this study. To. ore crushing properties. crushing strength of chromite ore jan chromite ore beneficiation prepared by mukesh ranjan properties of coal on cold crushing.

The microstructure of a direct-bonded chromite-magnesia refractory brick, typically used in copper and platinum converters, was modified by adding different amounts of nano-size TiO2 to the raw material mixture. Bricks with 0, 1, 3, 5, and 7 mass% TiO2 were produced and compared in terms of spinel formation; the role of the tetravalent cation Ti4+ in the bonding phase; as well as changes in ...

Porosity determination: In raw/green refractory materials the pores are all open fluids can pass through them. When these materials are fired some liquid formation due to fusion takes place and as a result some pores will be sealed. The apparent porosity as such takes the open pores and not the closed pores. True porosity is defined as:

produce porosity defects, and 2) the delineation of coremaking and metal processing variables having an effect on porosity generation. The cylindrical test casting shown in Figs. 2 and 3 was developed for these tests to observe the extent of porosity formation under various test conditions. This stepped-cone configuration was se-

Tabular alumina has good heat resistance and good bulk temperature thermal shock capabilities. The crystal staggered plate shape, to increasing the mechanical strength of the particles; interior structure full of closed pores, high bulk density, low apparent porosity and water absorption, to reducing the amount of fluid re-use productions; With good physical properties like: high ...

materials with high porosity are usually NOT chosen when they will be in contact with molten slag because they cannot be penetrated as easily. 4) Bulk Density: The bulk density is generally considered in conjunction with apparent porosity. It is a measure of the weight of a given volume of the refractory. For many refractories, the

To produce chromite refractory brick, it is pressed under a press of 400 tons, dried and fired at 1580°C for fifty two hours. Then, the standard properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk density and water absorption that the chromite …

the chromite particles resulting in pellets with low porosity and high compressive strength. Figure 5 also confirm the effect of silica on strength of pellets. Reactivity of very high strength pellets in smelting process is lower due to poor porosity and also formation of silicate layer on the surface of

The calculated porosities of the different samples correspond well with the experimental apparent porosity values. Both theoretical and measured density and porosity data indicated that TiO 2 addition to the chromite-magnesia brick did not result in a significant densification of the brick.

The microstructure of a direct-bonded chromite-magnesia refractory brick, typically used in copper and platinum converters, was modified by adding different amounts of nano-size TiO2 to the raw material mixture. Bricks with 0, 1, 3, 5, and 7 mass% TiO2 were produced and compared in terms of spinel formation; the role of the tetravalent cation Ti4+ in the bonding phase; as well as changes in ...

Semi-rebonded magnesite chrome bricks has lower apparent porosity, low air permeation, high bulk density. Semi rebonded magnesite chromite brick has good volume stability, micro structure mineral phase characteristic is the direct contact of periclase, periclase solid …

Tabular alumina has good heat resistance and good bulk temperature thermal shock capabilities. The crystal staggered plate shape, to increasing the mechanical strength of the particles; interior structure full of closed pores, high bulk density, low apparent porosity and water absorption, to reducing the amount of fluid re-use productions; With good physical properties like: high ...

Properties such as cold crushing strength apparent porosity apparent specific gravity . chromite ore is one and is used for testing in this study. To. ore crushing properties. crushing strength of chromite ore jan chromite ore beneficiation prepared by mukesh ranjan properties of coal on cold crushing.

Chromite based sands are one of the most widely used materials. ... (A2 and B2) enhanced the apparent porosity after firing, what resulted in a higher free opening. The increased on porosity suggests the formation of a weaker sintered layer due to the increase of critical flaw size.

the chromite particles resulting in pellets with low porosity and high compressive strength. Figure 5 also confirm the effect of silica on strength of pellets. Reactivity of very high strength pellets in smelting process is lower due to poor porosity and also formation of silicate layer on the surface of

materials with high porosity are usually NOT chosen when they will be in contact with molten slag because they cannot be penetrated as easily. 4) Bulk Density: The bulk density is generally considered in conjunction with apparent porosity. It is a measure of the weight of a given volume of the refractory. For many refractories, the

To produce chromite refractory brick, it is pressed under a press of 400 tons, dried and fired at 1580°C for fifty two hours. Then, the standard properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk density and water absorption that the chromite …

Tabular alumina is a kind of pure sintered corundum,which is sintered and completely shrink without adding any additive,such as MgO or B2O3,with coarse crystals and well-developed Al2O3 crystal structure.The tabular crystal structure is characterized by narrow pores,with more closed porosity, almost the same apparent porosity compare with fused corundum ,high purity, good stability volume ...

Study on the Production of Chromite Refractory Brick from Local properties such as cold crushing strength, apparent porosity, apparent specific gravity, bulk Keywords—chemical analysis, chromite ore, chromite refractory. The chromite ore crusher machine is widely applied in mine. crusher chromite mining and e porting copamys in oman

the apparent porosity of the infiltrated layer between 0 and 5 vol.%, the ratio between slag mass and refractory mass that is reacting is estimated to be 12 – 17 wt.% in Figure 8. At this ratio the

Specific Gravity and Porosity of Various Rock Types: Rock Type Specific Gravity (gm/cc) Porosity % Granite 2.60 - 2.70 0.5 - 1.5 Dolerite 3.00 - 3.05 0.1 - 0.5 Sandstone 2.00 - 2.60 5.0 - 25.0 Shale 2.00 - 2.40 10.0 - 30.0 Limestone 2.20 - 2.60 5.0 - 20.0 Dolomite ...

True porosity = (S- R)/S X 100 volume %, where S is the density and R is the bulk density. The density is the quotient of mass and volume excluding pore space and is determined on finely crushed material. Frequently, not the values of the true porosity but those of apparent porosity (open porosity) are used as the application property.

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