Email Adddress: [email protected]

compressive strength of chromite

compressive strength of chromite

Compressive Strength and Creep Behavior of a

The compressive strength of a magnesium chromite refractory in nitrogen was measured by rapidly loading specimens to failure at several temperatures up to 1600 O C. Strength retrogression was observed at temperatures above 1200°C. The creep behavior of the refractory in nitrogen was measured as a function of compressive stress in the range from 1.4 to 5. 6 MPa and as a function of temperature

Get Price

Detoxification and immobilization of chromite ore ...

2014-3-1  The compressive strength of pure MG is 65 MPa. With the molar ratio of S 2− /Cr(VI) increasing from 4 to 10, the compressive strengths of MGCS x

Get Price

Solidification/stabilization of chromite ore processing ...

2017-2-1  Although the compressive strength decreases by 8.3% (42.58 MPa) at 4:1 (BFS/FA) compared to 1:0 (BFS/FA), the less FA content in experiment acts as micro aggregate to make the internal structure compact. In contest to this, high FA content results in rapid decrease of compressive strength (Mejia et al., 2013).

Get Price

Hot Compressive Strength and Deformation of Sand

Abstract. Hot compressive strength and deformation of silica, olivine, zircon and chromite sand molds bonded by sodium silicate or bentonite were investigated. Sodium silicate bonded sand mold have the maximum hot strength at 200°C and 500°C, and bentonite bonded sand molds have it at 900°C. As sodium silicate and bentonite become soft above 500°C ...

Get Price

The Effect of Carbonaceous Reductant Selection on

2016-12-27  The pellet compressive strength results confirmed a link between existing reductant volatile content selection criteria set by industry. Equations and presented in this paper can be used by FeCr producers to select the reductant used in the pelletized chromite pre

Get Price

[Solidification/Stabilization of Chromite Ore

The results showed that after reduction, all of the S/S treated COPR samples met the pollution control limit of bricks and building block products (Chinese standard HJ/T 301-2007) produced with COPR for total Cr (0.3 mg x L(-1)), the compressive strength of all the S/S samples could meet the compressive strength standard (15 MPa) for producing clay bricks, and Cr existed as the specie that bound to

Get Price

v115n8a6 Comparison of physical properties of oxidative ...

2015-9-10  compressive strength than pellets prepared from metallurgical-grade chromite ore. The cured abrasion strength of the UG2 pellets was also superior to that of the metallurgical-grade pellets. Scanning electron microscopy (SEM) backscatter, secondary electron, and elemental X-ray

Get Price

Chromite Sand Testing - Minerals Tech

2021-3-16  Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can ... • Transverse tensile strength and compressive strength can also be measured and is more commonly seem in Europe and Asia. Gauge on tensile testing equipment and standard AFS tensile specimens .

Get Price

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED

2015-5-22  executed by stopping the pellet cooling at 1100°C for 60 minutes. The temperatures needed for a compressive strength of 100 kp respectively of 200 kp varied dependi ng on the pelletizing mixture. This also affected the oxidation of chromite iron [4]. This phase of the study included 24 sintering cases.

Get Price

Development of Chromite Sinter from Ultra-Fine

chromite fines and recycled fines on the compressive strength of the fired and pre-reduced pellets in varying diameters were studied.6,7) The possibility of pre-reduction of a variety of chromite ores with a low-grade carbonaceous * Corresponding author: E-mail: [email protected] DOI: dx.doi.org/10.2355/isijinternational.54.559

Get Price

v115n8a6 Comparison of physical properties of oxidative ...

2015-9-10  compressive strength than pellets prepared from metallurgical-grade chromite ore. The cured abrasion strength of the UG2 pellets was also superior to that of the metallurgical-grade pellets. Scanning electron microscopy (SEM) backscatter, secondary electron, and elemental X-ray

Get Price

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED

2015-5-22  executed by stopping the pellet cooling at 1100°C for 60 minutes. The temperatures needed for a compressive strength of 100 kp respectively of 200 kp varied dependi ng on the pelletizing mixture. This also affected the oxidation of chromite iron [4]. This phase of the study included 24 sintering cases.

Get Price

Chromite Sand Testing - Minerals Tech

2021-3-16  Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can ... • Transverse tensile strength and compressive strength can also be measured and is more commonly seem in Europe and Asia. Gauge on tensile testing equipment and standard AFS tensile specimens .

Get Price

[Solidification/Stabilization of Chromite Ore

The results showed that after reduction, all of the S/S treated COPR samples met the pollution control limit of bricks and building block products (Chinese standard HJ/T 301-2007) produced with COPR for total Cr (0.3 mg x L(-1)), the compressive strength of all the S/S samples could meet the compressive strength standard (15 MPa) for producing ...

Get Price

Study of Liquid Phase Formation during the Sintering of ...

2020-5-6  The compressive strength of the samples varied significantly from 5 kg/pellet to 305 kg/pellet. The microstructure of the sintered pellets revealed that the porosity and formation of liquid phase affects the compressive strength of the pellets. In addition of this the oxidation of chromite grains during cooling of also influences

Get Price

Unique challenges of clay binders in a pelletised chromite ...

2020-10-19  Figure 3-2: Graphic representation of compression strength test 68 Figure 3-3: An example of a typical compressive strength graph 68 CHAPTER 4: RESULTS AND DISCUSSION Figure 4–1: SEM micrograph images of the attapulgite clay (4‒1A), bentonite clay (4‒1) and chromite ore (4‒1 )

Get Price

Sodium Silicate Cold-Bonded Chromite Pellets for the ...

Chromite pellets containing 3 wt% sodium silicate-3 wt% SiO 2-1 to 4 M KOH solution and cured at 75°C for 24 h had compressive strengths of between 2.56 ± 0.44 and 3.12±0.1 kN, exceeding the compressive strength (1.54 ± 0.5 kN) of pre-reduced pellets obtained from a South African FeCr producer. Furthermore, pellets cured at low temperatures ...

Get Price

Development of Chromite Sinter from Ultra-Fine

pellet with suitable cold handling strength from a chromite ore is difficult. Also, the crushing of raw materials for pel-letization and the subsequent firing of the green pellets for strength development is an energy-intensive and complex process. In contrary, sintering of friable chromite ore can be done directly without any grinding.

Get Price

METHOD FOR THE CONVERSION OF CHROMITE ORE

Effect of Pelleting Temperature on Strength of Dried Chrome Ore Pellets, starting with a Three-Component Mix A mix comprised of 40.3 parts of chromite ore, 30.5 parts of light soda ash, and 29.2 parts inerts is pelleted at 25° C. on an 11-inch balling pan using a water spray.

Get Price

EFFECT OF ADDITIVES ON THE COMPRESSIVE STRENGTH

2013-7-12  Evolution of the compressive strength vs. temperature and heating time in the presence of 5% w/w of pozzolan or kaolinite in the starting mixture The effect of fly ash and red mud addition on the compressive strength is shown in Figure 2; these tests were carried out to explore the possibility of co-utilisation of mining and metallurgical wastes.

Get Price

v115n8a6 Comparison of physical properties of oxidative ...

2015-9-10  compressive strength than pellets prepared from metallurgical-grade chromite ore. The cured abrasion strength of the UG2 pellets was also superior to that of the metallurgical-grade pellets. Scanning electron microscopy (SEM) backscatter, secondary electron, and elemental X-ray

Get Price

Chromite Sand Testing - Minerals Tech

2021-3-16  Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can ... • Transverse tensile strength and compressive strength can also be measured and is more commonly seem in Europe and Asia. Gauge on tensile testing equipment and standard AFS tensile specimens .

Get Price

The Role of Geology on the Radioactive Attenuation

2012-6-17  chromite aggregate. The compressive strength values of the specimens of hematite aggregate were lowest (Fig. 2) because the ore is essentially quite brittle due to its oolitic nature. It might be more useful to use it as fine aggregate replacing sand rather than to be used as coarse aggregate.

Get Price

Unique challenges of clay binders in a pelletised chromite ...

2020-10-19  Figure 3-2: Graphic representation of compression strength test 68 Figure 3-3: An example of a typical compressive strength graph 68 CHAPTER 4: RESULTS AND DISCUSSION Figure 4–1: SEM micrograph images of the attapulgite clay (4‒1A), bentonite clay (4‒1) and chromite ore (4‒1 )

Get Price

Strength Of The Ore Body Dwarsrivier Chrome

uniaxial compressive strength of five samples for an ore body had been deemed sufficient to design a mine. Detailed analysis of strength values showed that the coefficient of variation (COV) for pyroxenite and chromitite was 0.33 nearly falling outside the region of even statistical predictability. ... Around 85 % of the chromite (chrome ore ...

Get Price

Sodium Silicate Cold-Bonded Chromite Pellets for the ...

Chromite pellets containing 3 wt% sodium silicate-3 wt% SiO 2-1 to 4 M KOH solution and cured at 75°C for 24 h had compressive strengths of between 2.56 ± 0.44 and 3.12±0.1 kN, exceeding the compressive strength (1.54 ± 0.5 kN) of pre-reduced pellets obtained from a South African FeCr producer. Furthermore, pellets cured at low temperatures ...

Get Price

Application of Response Surface Methodology for

2013-10-25  Keywords—Chromite sand, resin bonded sand core, central ... The compressive strength of a molasses-cement sand system was modeled with the help of non-linear regression equation [18]. Percentage of molasses and cement were used as inputs and the experiments were

Get Price

USE OF FERROCHROME SLAG AS AGGREGATE IN

2018-11-30  4.2.2 Compressive Strength Due to the inclusion of water cooled ferrochrome slag compressive strength decreased. For 10-50% of WCFS, the compressive strength decreased by 2-14% in 28 days, 1-16% at 91 days and 2-16% in 180 days. There is an increment in compressive strength with curing period. The increase in

Get Price

Development of Chromite Sinter from Ultra-Fine

pellet with suitable cold handling strength from a chromite ore is difficult. Also, the crushing of raw materials for pel-letization and the subsequent firing of the green pellets for strength development is an energy-intensive and complex process. In contrary, sintering of friable chromite ore can be done directly without any grinding.

Get Price

EFFECT OF ADDITIVES ON THE COMPRESSIVE STRENGTH

2013-7-12  Evolution of the compressive strength vs. temperature and heating time in the presence of 5% w/w of pozzolan or kaolinite in the starting mixture The effect of fly ash and red mud addition on the compressive strength is shown in Figure 2; these tests were carried out to explore the possibility of co-utilisation of mining and metallurgical wastes.

Get Price

Chromite Sand Testing - Minerals Tech

2021-3-16  Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can ... • Transverse tensile strength and compressive strength can also be measured and is more commonly seem in Europe and Asia. Gauge on tensile testing equipment and standard AFS tensile specimens .

Get Price

Unique challenges of clay binders in a pelletised chromite ...

2020-10-19  Figure 3-2: Graphic representation of compression strength test 68 Figure 3-3: An example of a typical compressive strength graph 68 CHAPTER 4: RESULTS AND DISCUSSION Figure 4–1: SEM micrograph images of the attapulgite clay (4‒1A), bentonite clay (4‒1) and chromite ore (4‒1 )

Get Price

Strength Of The Ore Body Dwarsrivier Chrome

uniaxial compressive strength of five samples for an ore body had been deemed sufficient to design a mine. Detailed analysis of strength values showed that the coefficient of variation (COV) for pyroxenite and chromitite was 0.33 nearly falling outside the region of even statistical predictability. ... Around 85 % of the chromite (chrome ore ...

Get Price

Sodium Silicate Cold-Bonded Chromite Pellets for the ...

Chromite pellets containing 3 wt% sodium silicate-3 wt% SiO 2-1 to 4 M KOH solution and cured at 75°C for 24 h had compressive strengths of between 2.56 ± 0.44 and 3.12±0.1 kN, exceeding the compressive strength (1.54 ± 0.5 kN) of pre-reduced pellets obtained from a South African FeCr producer. Furthermore, pellets cured at low temperatures ...

Get Price

[Solidification/Stabilization of Chromite Ore

The results showed that after reduction, all of the S/S treated COPR samples met the pollution control limit of bricks and building block products (Chinese standard HJ/T 301-2007) produced with COPR for total Cr (0.3 mg x L(-1)), the compressive strength of all the S/S samples could meet the compressive strength standard (15 MPa) for producing ...

Get Price

Application of Response Surface Methodology for

2013-10-25  Keywords—Chromite sand, resin bonded sand core, central ... The compressive strength of a molasses-cement sand system was modeled with the help of non-linear regression equation [18]. Percentage of molasses and cement were used as inputs and the experiments were

Get Price

Arch. Min. Sci., Vol. 58 (2013), No 1, p. 189–198

The chromite slag produced by Ferro-chromite refinery plant of this mine. The purpose of this paper is to analyze the findings from extensive laboratory test programs carried out to determine the effects of chromite slag on mechanical properties of cemented tailing backfills (CTB). The results show that chromite slag improves the mechanical proper-

Get Price

PROCESS FOR THE PRODUCTION OF SODIUM

The pellets formed are tested for compressive strength using a "compression tester," model LPCM, John Chatillon and Son, New York, N.Y. In each instance, about 10 pellets are tested in order to obtain an average figure. The pellet formed by the method given above are tested for compressive strength when first formed and after drying at 200°C.

Get Price

普通硅酸盐水泥及碱激发水泥固定铬渣的毒性浸出比较-《东南 ...

2014-7-16  The compressive strength of the solidified specimen decreases from 50.4 to 25.8 MPa when the content content increases from 20% to 45%. The concentrations of the total chromium and hexavalent chromium in the leachate increase with the increase of the COPR content.

Get Price

EFFECT OF ADDITIVES ON THE COMPRESSIVE STRENGTH

2013-7-12  Evolution of the compressive strength vs. temperature and heating time in the presence of 5% w/w of pozzolan or kaolinite in the starting mixture The effect of fly ash and red mud addition on the compressive strength is shown in Figure 2; these tests were carried out to explore the possibility of co-utilisation of mining and metallurgical wastes.

Get Price