Compressive strength and composite pore structure parameters …

Mineral resources is important to economic development, whereas tailings are regarded as low-value products that cannot be utilized after beneficiation operation, which incurs serious harm to the environment [1], [2].Among them, the utilization of iron tailings is a hotly studied topic [3].Cai et al. [4], [5] studied the effect of iron tailings on the workability and …

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Cold compressive strength of iron ore pellets in distinct reduction

Cold compressive strength (CCS) of the original test pellets was measured using an apparatus described in ISO 4700, which considers the determination of crushing strength for iron ore pellets. For individual original pellets, a CCS result of more than 150 daN can be considered acceptable, and a result of less than 60 daN is very weak [8]. The ...

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Process for the production of sodium chromate from chromite ore

The pellets formed are tested for compressive strength using a compression tester, model LPCM, John Chatillon and Son, New York, NY. 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 200C.

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Development of Chromite Sinter from Ultra-Fine Chromite …

EPMA/EDS. The developed sinter was found to possess adequate handling strength that would be well acceptable to produce ferrochrome in the SAF. KEY WORDS: chromite ore fines; pot …

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Studies on the Mechanical and Physical Properties of …

The increase in compressive strength is found to be highly appreciable above the temperature of 1373 K. The increase in compressive strength up to 1373 K is expected to be due Fig. 2 Effect of firing temperature on compressive strengths of fired OMC hematite iron ore pellets prepared with different binders: firing time—a 1h,b 2 h and c 3h 123

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Study the effect of chromite ore properties on pelletisation process

Chrome ore properties play a critical role in various pelletisation subprocesses (grinding, filtering, pelletisation and sintering) and slight variation in ore properties significantly affect the whole pelletisation process. Three ore samples (sample-A, B and C) were collected from different working faces of a chromite ore mine. Experiments were carried out to find out …

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Novel Additives to Improve Sintering Characteristics of Indian …

This study is conducted to find suitable additives to improve chrome ore pelletization and pellet properties. Two types of additives (carbonaceous heating additives and …

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ANALYSIS OF INFLUENCE OF SILT/CLAY IMPURITIES …

Table 3: Summary of Compressive Strength Test Results Samples Compressive Strength @ 7-days @ 14-days @ 21-days @ 28-days A 10.70 14.64 17.64 19.22 B 7.50 11.44 14.44 16.02

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Effect of Gangue Distribution on Compressive Strength of Iron Ore …

A novel ambient condition production of superior strength, non-abrasive, non-sticky iron ore pellets devoid of undesirable fines under the compression stress of 4 kN is presented.

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CN117230305A

The invention discloses a method for improving compressive strength of chrome ore powder pellets, which comprises the following steps: the invention prepares chrome ore pellets by …

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Compressive strength, durability, and resilient modulus of cement

Strength and durability of iron ore tailing materials stabilized using Portland Cement as base materials: a case study of Golgohar mine. J. Transp. Infrastruct. ... the compressive strength was strongly correlated with the ratio of porosity to volumetric cement-content, and IOT-cement (5 % and 10 %) mixtures displayed suitable durability ...

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Estimating effect of chrome ore granulometry on sintered pellet

The effect of chromite ore granulometry and sintering process parameters was evaluated to improve the metallurgical performance of pellets in a submerged arc furnace. The …

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Compressive strength of iron-ore pellets

Compressive strength (OST 14-3-72) is regarded as one of the principal criteria of suitability of roasted iron- ore pellets for metallurgical processing. One of the machines at the Sokolovsko-Sarbaisk combine (SSGOK) was used to study the effect of the roasting

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Drying and Roasting Characteristics of Iron Ore Pellets with …

Drying and roasting behavior of iron ore pellets with microwave and conventional heating have been comparably investigated. The results showed that the dehydration time of green pellets can be shortened by approximately two-thirds with microwave heating. Meanwhile, the average compressive strength of pellets with organic binders dried by microwave heating …

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Novel Additives to Improve Sintering Characteristics of Indian Chrome

The chrome ore sinter thus produced was found to be inferior in strength, comparable to that of an iron ore sinter, but strength requirements may not be the same for both.

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Compressive strength, durability, and resilient modulus of cement

Compressive strength, durability, and resilient modulus of cement-treated magnetite and hematite iron ore tailings as pavement material ... Strength and durability of iron ore tailing materials stabilized using Portland Cement as base materials: a case study of Golgohar mine. J. Transp. Infrastruct. Eng., 7 (2021), pp. 101-122, 10.22075/jtie ...

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Development of new heavy concretes containing chrome-ore for …

Hardened concrete has a very high compressive strength. The durability of hardened concrete is higher than other building materials, and consequently maintenance operations and costs are less. It shows a very good adherence with concrete steel reinforcements (Hamad, 2014).

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Development of new heavy concretes containing chrome-ore for …

Strength tests were carried out of new heavy concretes in pressure 30 MPa. Strength values were calculated by usin equation 3 and there sults shown that in Table 8. There sults obtained showed that the new heavy concretes had a compressive strength close to the commonly used C25-30 concretes (Cui et al., 2017). These values are accepted in the ...

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Hydrogen-based pre-reduction of chromite: Reduction and …

Based on the findings in Fig. 5, the compressive strength decreases with higher Fe metallization, possibly due to the reduced binder quantity and the oversized metal Fe grains. …

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(PDF) Briquetting Fine Chromite Concentrates

The results demonstrate that compressive strength values of about 196 and 182 MPa after two days of hot curing can be achieved when replacing …

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An Overview of Currently Applied Ferrochrome Production

More recently, Pariser et al. (2018) reported that South Africa accounted for 60% of the global chrome ore (i.e., chromite) output in 2018 . Nevertheless, the growth in the FeCr industry is paralleled by chromite mining. ... Figure 15 shows pellets with a compressive strength of 3.12 ± 0.10 kN were produced using a combination of 3 wt% sodium ...

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Development of Chromite Sinter from Ultra-Fine Chromite …

chromite fines and recycled fines on the compressive strength of the fired and pre-reduced pellets in varying diameters were studied.6,7) ... ity chrome sinter using the Indian chromite ore fines, which will be suitable for cold handling and easy smelting in the electric arc furnace, producing ferrochrome as the final

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compressive strength of chrome ore

Compressive strength of chrome ore tandartsderikxnl chrome ore crusher compressive strength specifiions impact crusher ore processing impact crusher is suitable for materials whose compressive strength is under 350mpa and particle size is less than 500mm with end products in cubic shape the impact crusher is widely used for sand and rock ...

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Factors affecting compressive strength of steel slag concrete: A

From the gathered compressive strength data, two groups of concrete according to ACI 211 [158] were classified, namely normal-strength concrete (NSC) with the compressive strength below 6000 psi (41.37 MPa) and the other group with that higher than 6000 psi considered as high-strength concrete (HSC). As a result, 342 and 228 data were found on ...

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Prediction model of compressive strength of ed concrete …

The compressive strength of sample F660-0.50-PS# (PS ing agent type) was 3.89 MPa, while the sample F660-0.50-OP# (OP ing agent type) was only 2.16 MPa. The compressive strength of specimens with different ing agent types showed an apparent difference. By contrast, the smaller pore size characteristic of PS ing agent type ...

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Utilization of Chrome Ore Concentration Plant Tailings as Fine

Large amount of the chrome ore concentration plant tailings was discarded during chrome ore mining process. The accumulation of the tailings takes large areas of land for the storage and causes ...

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Effect of basicity on the structure characteristics of chromium …

The firing performance of the chromium-nickel bearing iron ore pellets is greatly improved by increase in quaternary basicity, much higher compressive strength of the fired …

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Process for the production of sodium chromate from chromite ore

A method of producing sodium chromate from chromite ore, which involves mixing the ore with sodium carbonate and a refractory diluent, pelleting the mixture using an aqueous solution of …

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Development of Chromite Sinter from Ultra-Fine Chromite Ore by …

The effects of composition, grain size of 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 reductant was also examined. 8) These studies have shown that pre ...

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(PDF) Effect of molasses binder on the physical and mechanical

Compressive strength. Wet and oven-dried pellets were subjected to the compressive strength test by using Instron 5569 with a maximum capacity of 10 kN. The load required to fracture the pellet was considered as the compressive strength of the pellet. At least 10 samples of a particular iron ore composition were tested.

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