reducibility of chromite

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Carbothermic Reduction of Chromite Ore , - SpringerLink
Carbothermic Reduction of Chromite Ore , - SpringerLink

Sep 15, 2009· Inert gases have been used in these investigations to control the experimental conditions However, little information is available in the literature on the influence of the gas flow rate on the rate of reduction Experiments were carried out to study the influence of the flow rate of inert gas on the reducibility of chromite ore...

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Characterisation of the Physical and Metallurgical ,
Characterisation of the Physical and Metallurgical ,

In this study, the reducibility index, RI, for the Ug6 sample was calculated as 0868%/min and the reduction degree, RD, as 9128% As sample Ug6 has the lowest content among Muko iron ore samples, it is safe to assume that the reducibility parameters of samples Ug1–5 will be higher...

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Chromite - Wikipedia
Chromite - Wikipedia

Chromite today is mined particularly to make stainless steel through the production of ferrochrome (FeCr), which is an iron-chromium alloy Chromite grains are commonly found in large mafic igneous intrusions such as the Bushveld in South Africa and Travancore in India...

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Production Smelting Technologies for Ferrochromium
Production Smelting Technologies for Ferrochromium

carbide (Cr,Fe)7C, Thus, an ore rich in iron oxide will have high reducibility at relatively low temperatures 171 Accordingly, the reduction of chromic oxide in such ores will also occur at relatively lower temperatures with the likely formation of a carbon-rich chromite carbide (Cr,C, or Cr7C3) known to be stable at lower temperatur...

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Christopher L Marshall | Argonne National Laboratory
Christopher L Marshall | Argonne National Laboratory

Chris Marshall is a senior research chemist in the Catalysis Science Group of the Chemical Sciences and Engineering Division at Argonne His research concentrates on the synthesis, testing and in situ characterization of refining, chemical and biomass conversion catalysts Synthesis work has recently concentrated on the use of atomic layer deposition for stabilization and improved performance ....

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chromite powder in ball mill - ekhayawhiterivercoza
chromite powder in ball mill - ekhayawhiterivercoza

factors affecting the reducibility of sintered chromite , - Pyro the chromite mineral in the raw material in respect of kinetic reasons , (eg sesqui oxide content), porosity (eg wood dust), coke powder addition and , chromite grain size (ores vs pellets), grinding method (ball mill grinding vs pressure...

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鉻鐵 / Ferro Chrome - 澄柏國際股份有限公司-(NCM CORP-CPMG ,
鉻鐵 / Ferro Chrome - 澄柏國際股份有限公司-(NCM CORP-CPMG ,

Reducibility of chromite ore is important for process efficiency It is determined by its mineralogy (MgO/Al2O3 ratio), the MgO structural form in the chromite ore, chromite grain size, the extent of grains distribution in ore and the ore melting temperature...

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AMIT BHALLA A dissertation submitted to the faculty of ,
AMIT BHALLA A dissertation submitted to the faculty of ,

AMIT BHALLA A dissertation submitted to the faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in fulfillment of the requirements , reducibility of chromite ore and the reactivity of carbonaceous reductants...

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High-resolution X-ray diffraction study of the chromite ,
High-resolution X-ray diffraction study of the chromite ,

“Chromite Mineralogy and Metallurgical Behaviour,” in Proceedings of MINTEK 50 International Conference on Mineral Science and Technology, edited by C F Houghton (Council for Mineral Technology, Randburg, South Africa), Vol 2, pp 913–922...

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fine chromite ore smelting - BINQ Mining
fine chromite ore smelting - BINQ Mining

Dec 13, 2012· FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE , Outokumpu Oy has developed a steel belt sintering process for sintering pellets from fine chromite concen-trate Smelting of , of chromite lumpy ore in the smelting »More detailed...

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Catalytic reduction of carbon-chromite composite pellets ,
Catalytic reduction of carbon-chromite composite pellets ,

thermochimica acta ELSEVIER Thermochimica Acta 292 (1997) 85-94 Catalytic reduction of carbon-chromite composite pellets by lime YL Ding*, NA Warner School of Chemical Engineering, The University of Birmingham, Edgbaston, Birmingham B15 2TE, UK Received 25 July 1996 Abstract The catalytic effect of lime on the reduction of carbon-chromite composite pellets was investigated at ,...

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FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE ,
FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE ,

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The energy consumption and recovery of chromium are important economic factors in ferrochrome produc-tion Outokumpu has a lot of experience of the reduction behavior of the sintered pellets in industrial-scale furnaces and also on the grounds of numerous laboratory and pilot-scale investigations...

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Production of Nickel Bearing Pig Iron in Blast Furnace ,
Production of Nickel Bearing Pig Iron in Blast Furnace ,

For each tonne of chromite ore mined in Sukinda, approximately ten tonnes of fine overburden material is generated The overburden typically contains about 30 – 60 per cent Fe2O3, 03 – 11 per cent Ni, four to nine per cent Cr2O3 and 004 – 02 per cent cobalt and is being discarded leading to loss....

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chromite powder in a ball mill - santhosanl
chromite powder in a ball mill - santhosanl

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE , grinding method (ball mill , Factors Affecting the Reducibility of Sintered Chromite Pellets and chromite ore crusher ferrochrome powder select zeniths chromite ore processing plants_ball mill,jaw , chromite ore Biggest Producer Of Chromite In The World Gold Ore Crusher - Coarse ....

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v118n6a4 NaOH-assisted direct reduction of Ring of Fire ,
v118n6a4 NaOH-assisted direct reduction of Ring of Fire ,

The reducibility of three different chromite ores, based on TGA analysis, is shown in Figure 1 It is worth noting that, from a mineralogical perspective, the Canadian ore contains hydrous silicate gangue minerals This is reflected in larger mass losses by the Black Thor and Black Horse ores during...

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FACTORS AFFECTING THE REDUCIBILITY OF , - coreacuk
FACTORS AFFECTING THE REDUCIBILITY OF , - coreacuk

FACTORS AFFECTING THE REDUCIBILITY OF SINTERED CHROMITE PELLETS AND CHROMITE LUMPY ORE By T Lintumaa, H Krogerus and P Jokinen Abstract The energy consumption and recovery of chromium are important economic factors in ferrochrome produc-tion Outokumpu has a lot of experience of the reduction behavior of the sintered pellets in ....

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An integrated approach for production of stainless steel ,
An integrated approach for production of stainless steel ,

Jul 15, 2018· Chromite ore is an essential raw material for production of ferrochromium, metallic chromium and stainless steel products in the metallurgical industry Currently, with the depletion of high grade lumpy chromite ores, , The reducibility index (RI) ,...

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Reducing energy consumption by alternative processing ,
Reducing energy consumption by alternative processing ,

The carbothermic reduction of chromite ore to produce high carbon ferrochromium is among the most energy intensive metal extraction processes performed, due not only to the highly endothermic nature of the reduction reactions but also the very high operating temperatures required for the smelting operation to separate the chrome-containing alloy from the discard slag...

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KWG Resources Inc | (KWG: CSE) | Analysis ‘Ring of Fire ,
KWG Resources Inc | (KWG: CSE) | Analysis ‘Ring of Fire ,

Feb 11, 2009· This is a Discovery Alert and no buy or sell recommendation – Analysis ‘Ring of Fire’ World Class Chromium Discovery Hello all, Much has been said of the 2007 Eagle One copper/ nickel discovery by Noront, in what is now referred to as the Ring of Fire, Ontario, propelling Noront to the front pages of the exploration scene...

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Chromite ore Beneficiation process plant in South Africa ,
Chromite ore Beneficiation process plant in South Africa ,

Since chromite is weakly magnetic, it cannot be separated from the metallic phase by magnetic separation 18 Several investigations have been conducted to determine the reducibility of South African chromites as a function of temperature and composition3,5,lO,19-22...

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TheMelting Behaviour ofChromite Ores and the Formation ,
TheMelting Behaviour ofChromite Ores and the Formation ,

and the reducibility of chromitc ores, to investigate the dependence of these properties on the structure and chemistry, and to find ways to decrease chromium losses to the slag The reduction and melting behaviour ofseveral chromite orcs was studied by a number of techniqu including thermogravimetry (TG), diFFerenlial lhermal analysis...

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Effect of Chrome Ore Quality on Ferrochrome Production ,
Effect of Chrome Ore Quality on Ferrochrome Production ,

31 Reducibility Reducibility of ore, as has been indicated before [1, 2], is determined by its mineralogy (MgO/Al2O3 ratio), the MgO structural form in the chrome ore, chromite grain size, the extent of grains distribution in ore and the ore melting temperature...

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Recovery of chromite values from ferrochrome industry flue ,
Recovery of chromite values from ferrochrome industry flue ,

The variation additionally affects the reducibility from the ore Increasing levels of magnesium compared with iron within the divalent site can make the chromite harder to reduce whereas increasing levels of iron in the actual trivalent site replacing aluminium increases the reducibility from the chromite...

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Smelting - Melting - Refining Archives — Page 3 of 14
Smelting - Melting - Refining Archives — Page 3 of 14

Smelting – Melting – Refining Boron Minerals & Calcination , Research has shown that the reducibility of conventional (acid) pellets can be increased by the addition of flux or an organic binder The increase in pellet reducibility results in less wustite in the center of the pellet at high temperatures, such as those obtained in the ....

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Valuable waste - at-minerals
Valuable waste - at-minerals

make the chromite more difficult to reduce whereas increas-ing amounts of iron in the trivalent site replacing aluminium will increase the reducibility of the chromite Most of the world‘s production of chromite (95 %) is used in the metallurgical industry in the form of ferrochromium alloys The alloys are produced by high-temperature reduc-...

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Solid State Reduction of Preoxidized Chromite-iron Ore ,
Solid State Reduction of Preoxidized Chromite-iron Ore ,

The reduction of chromite pellets usually needed long reduction duration in order to gain high metallization rate because of poor reducibility of iron phase and chromium phase in chromite spinel As is demonstrated in Fig 4 , with the increasing reduction time from 70 min to 130 min, metallization rate of chromite-iron ore pellets rise from 70 ....

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An account of magnetite ore in India - steel-360
An account of magnetite ore in India - steel-360

A metallurgical explanation is the higher reducibility of haematite compared to magnetite All factors remaining constant, the amount of reduction haematite would undergo is significantly greater than that of magnetite In other words, haematite forms iron much faster than magnetite...

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EFFECTS OF OXIDATION ON THE MICROSTRUCTURE AND ,
EFFECTS OF OXIDATION ON THE MICROSTRUCTURE AND ,

These observations indicate a) the reducibility of the porous fine particulate pellets is greater than lump ore, especially at low temperatures, and b) there is potential for increasing the reducibility of the chromite pellets through further oxidation of the pellets during cooling stages of pellet manufacture...

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The reducibilty of chromite ore and reactivity of ,
The reducibilty of chromite ore and reactivity of ,

Abstract The purpose of this dissertation is to study the reducibility of chromite ore and reactivity of carbonaceous reductants The effect of temperature, particle size, composition, reducing agent and reducing atmosphere on the kinetics of the reduction of given chromite (obtained from Xstrata) was studiedusing tga,and to test reactivity of the reductant, present experimental data was ....

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THE INFLUENCE OF ADDITION OF SILVER AND COPPER ON THE ,
THE INFLUENCE OF ADDITION OF SILVER AND COPPER ON THE ,

The influence of addition of silver and copper on the reduction behavior of binary oxide CrAl3O6 was investigated The formation of copper chromite CuCr2O4 and silver chromate Ag2CrO4 during calcinations process was observed The intermediate phase CrO was detected when copper and silver-copper systems were reduced at temperatures above 500°C...

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