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  • Properties of concrete pavements prepared with

     · The high-carbon ferrochromium slag is waste material obtained in the manufacture of high-carbon ferrochromium FeCr(C). The high-carbon FeCr metal with 65 Cr (min) content is produced in electro-arc furnaces by the carbo-thermal process out of the oxide of chromium ore (the chrome spinel with the Cr 2 O 3-to-FeO ratio more than 2.5) with coke

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  • KINETIC INVESTIGATION OF CHROMITE REDUCTION IN

     · thermodynamic constraints how much carbon can be oxidized under a given set ofconditions. This paper presents the results ofinvestigations on the reduction offluxed chromite ore by carbon dissolved in a high-carbonferrochromium (HCFeCr) alloy and also on the effect ofadding powdered graphite to the slag.

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  • Minerals Free Full-Text Multi-Analytical

    High-carbon ferrochrome (HC FeCr) produces 1.1–1.6 tons slag/ton of metal 4 5 with an annual global production of 13 Mt HC FeCr in 2018 . Slag production is relatively higher for low-carbon ferrochrome (LC FeCr) (2.4–2.5 tons of slag/ton metal) but the global annual production was only 0.9 Mt in 2018 .

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  • (PDF) Hexavalent chromium removal by ferrochromium slag

    tivity of high carbon ferrochromium slag and its applicability as an aggregate for concrete in Proceedings of the 10th International Congress on the Chemistry of Cement vol. 4 No. iv051 1997 4

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  • PRODUCTION CHARACTERISTICS AND USE OF

     · Production Characteristics and Use of Ferrochromium Slags 173 2.1 Ferrochrome slag The temperature of the slag in tapping is 1700 °C and that of the ferrochrome 1600 °C. The smelting point of the slag has to be higher than the metal smelting point because metal is heated up by using slag

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  • (PDF) Potential of Ferro Chrome Slag as Construction Material

    High Carbon Ferro Chrome slag is generated as waste material at Ferro Alloys manufacturing units. The slag is coarse granular material and hence it may be explored for suitability as construction

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  • HIGH CARBON FERROCHROMIUM OPERATIONAL

     · Conventional high carbon ferrochromium production is basically carried-out by carbothermic method using car-bon based agents such as coal metallurgical coke anthracite. As a result of reduction reactions reduced oxides generate metal alloy phase and unreduced oxides generate slag phase. Metal and slag flow from the tapping hole every 2-3 hours through tapping operations. Afterwards post-tapping operations of which include casting and crushing-screening

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  • High Carbon Ferrochrome TechnologyScienceDirect

     · High carbon ferrochrome is an intermediate product and is used as a feed material in the production of value-added materials such as stainless steel. Typical product types for high carbon ferrochrome are crushed lumpy product with a silvery metallic appearance (Fig. 9.1) and irregular flaky granulated product with a greenish appearance.

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  • low carbon ferrochrome powder crushed

    VARIOUS TECHNIQUES TO PRODUCE LOW CARBON . · 4.2.3 Production of Low Carbon Ferrochrome from Chromite Ore Unlike liquid state decarburi zation of high carbon ferrochrome to pr oduce low carbon grade following proc-esses can be viewed as reduction of chromite by solid carbon (graphite) or H2 to get metallic chromium or an alloy of iron and chromium in solid state.

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  • Use of waste ferrochromium slag as aggregate in concrete

     · Ferrochromium slag generated annually is estimated as 15 million tons 5 . Utilization of this waste material in concrete may help to reduce the need for natural aggregates and decrease the environmental impact of concrete. Although there are studies on the use of ferrochromium slag in road construction 7 9 10 most of the slag obtained

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  • REFINING OF CHARGE CHROME A STUDY OF SOME

     · The possibility to dilute energy with more mass is limited. It is possible to use crushed charge chrome at high carbon levels but at lower carbon level this is inefficient. At this stage of the process it is more efficient to dilute the energy by using fines of the final product or mild steel scrap. However the mild

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  • Ferro-alloy production Part Two Total Materia Article

    The reaction is extremely exothermic and liberates chromium from its ore producing LC ferrochromium and a calcium silicate slag. This slag which still contains recoverable chromium oxide is reacted in a second ladle (ladle No. 2) with molten high-carbon ferrochromesilicon to produce the intermediategrade ferrochromesilicon.

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  • Identification and Description of Mineral Processing

     · Ferrochromium an alloy of iron and chromium is used as an additive in steel making. There are three major grades of ferrochromium low carbon high carbon and charge grade. In the past low carbon ferrochromium was required by steel makers to keep the carbon content of steel low. However improved ladle refining techniques such as

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  • processing methods of ferrochrome slag Prominer

    Ferrochrome slag is a waste material obtained from the manufacturing of high carbon ferrochromium alloy. This slag is formed as a liquid at 1700 Â C and its main components are

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  • Production of FerroalloysScienceDirect

     · High silicon ferrochromium low in carbon can be desiliconized by treatment with a chromite ore–lime slag when it is necessary to produce LC ferrochromium. 1.10.3.3.3. Phosphorous Content of High-Carbon Ferrochromium. Phosphorous is detrimental to both the mechanical properties and corrosion resistance of stainless steels.

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  • (PDF) Implementation of industrial waste ferrochrome slag

    Ferrochrome slag is a waste material obtained from the manufacturing of high carbon ferrochromium alloy. This slag is formed as a liquid at 1700 °C and its main components are SiO2 Al2O3 and MgO.

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  • Behavior of Alloying Elements during Electro-Slag

     · using DC electrode positive power. The current voltage and average power input during ESR were maintained at 1300 A 32 ± 2 V and 41 kW respectively in all the experiments. The solidified slag was crushed just before ESR and screened to below 20 mesh size powder and preheated at 700–800°C for 5-6 hours in a

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  • PRODUCTION CHARACTERISTICS AND USE OF

     · Production Characteristics and Use of Ferrochromium Slags 173 2.1 Ferrochrome slag The temperature of the slag in tapping is 1700 °C and that of the ferrochrome 1600 °C. The smelting point of the slag has to be higher than the metal smelting point because metal is heated up by using slag liquid phase.

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  • PRODUCTION CHARACTERISTICS AND USE OF

     · Production Characteristics and Use of Ferrochromium Slags 173 2.1 Ferrochrome slag The temperature of the slag in tapping is 1700 °C and that of the ferrochrome 1600 °C. The smelting point of the slag has to be higher than the metal smelting point because metal is heated up by using slag

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  • Process for the production of ferrochromiumFried Krupp

    What is claimed is 1. Process for the production of ferrochromium with a carbon content of from 0.02 to 10 weight from iron-containing chromium ore by heating a mixture of chromium ore solid carbon-containing fuel and slag-forming constituents in a rotary kiln and subsequently melting ferrochromium from the reaction product that is removed from the rotary kiln and cooled down comprising

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  • 12.4 Ferroalloy ProductionUS EPA

     · 12.4 Ferroalloy Production 12.4.1 General Ferroalloy is an alloy of iron with some element other than carbon. Ferroalloy is used to physically introduce or "carry" that element into molten metal usually during steel manufacture.

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  • Can Industry Decarbonize Steelmaking inChemistry

     · Today iron is largely made inside blast furnaces running at 2 000 °C or more where ore coke and limestone meet a blast of hot air creating molten pig iron with a high carbon content—roughly 4–5 . Coke the crucial carbon source for modern steelmaking is manufactured by heating crushed coal to drive off tar and gases.

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  • Duplex process for production of low carbon ferrochrome

     · about 25-30 Si. The rich slag from b reacts with intermediate semi-product with 25 Si from ladle c to produce the final low carbon ferrochrome alloy. The approximate power and raw material consumption for making a ton of low carbon ferrochrome by this process are as follows in some plants — Name of raw material Quantity / M. T.

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  • (PDF) IRJET- USING OF FERRO-CHROME SLAG AS A COARSE

    In high carbon ferrochromium metallic Cr content is 60–65 with varying amounts of Fe and C. Ferrochromium is produced pyrometallurgically by Carbothermic reduction of chromite ore (FeO·Cr2O3). The main raw material in the production of ferrochrome is chromite which is basically chrome and iron oxides containing mineral.

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  • USING OF FERRO-CHROME SLAG AS A COARSE

     · 1.2 Chemical composition of Ferro-Chrome Slag. Ferrochromium is a master alloy of iron and chromium. In high carbon ferrochromium metallic Cr content is 60–65 with varying amounts of Fe and C. Ferrochromium is produced pyrometallurgically

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  • EcoblastSuper Ind.

    Ecoblast® (Aramco approved) Ferrochrome slag is a excretory product of stainless steel. It is a waste material obtained when High Carbon Ferrochromium Alloy is manufactured. This slag forms as a liquid at 1700°C and consists of the components SiO2 Al2O3 and MgO. Moreover it contains chrome ferrous/ferric oxides and CaO.

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  • USING OF FERRO-CHROME SLAG AS A COARSE

     · 1.2 Chemical composition of Ferro-Chrome Slag. Ferrochromium is a master alloy of iron and chromium. In high carbon ferrochromium metallic Cr content is 60–65 with varying amounts of Fe and C. Ferrochromium is produced pyrometallurgically by Carbothermic reduction of chromite ore (FeO·Cr 2 O 3

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  • Commissioning and Operatingan InductionFurnace

     · Zimasco (KweKwe Division) produces 190 kl of high­ carbon ferrochromium (HCFeCr) per annum whcn running at full capacity. Considerable quantities of high-carbon ferrochromium smaller than 12 5 mill are generated when the initial high-carbon ferrochromium ingots from the electric-arcfurnaces are crushed and screened to meet customer s requirements.

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  • Impurities removal from high carbon ferrochromium by

     · The purpose of the given research was to investigate the possibility of high-carbon ferrochromium refining to remove harmful impurities as a result of metal treatment by slag mixtures on the basis of the CaO-MgO-SiO 2 system. The final conclusions were drawn from experimental results. It was shown that the treatment of high-carbon ferrochromium

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  • Determine the Chromium Concentration for a Possible Re

     · High-carbon ferrochrome (HC FeCr) produces 1.1–1.6 tons slag/ton of metal 4 5 with an annual global production of 13 Mt HC FeCr in 2018 6 . Slag production is relatively higher for low-carbon ferrochrome (LC FeCr) (2.4–2.5 tons of slag/ton metal) but

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  • high carbon ferrochrome jaw crusher for chemical industry

     · High Carbon Ferrochrome Technology ScienceDirect. Jan 01 2013· By far the most common process for dealing with possible Cr 6 containing waste in the SA high carbon ferrochrome industry is aqueous chemical Cr 6 reduction with suitable reducing agents (e.g. ferrous sulfate) with subsequent precipitation of the Cr 3 hydroxides and land filling in specially designed waste facilities.

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  • Duplex process for production of low carbon ferrochrome

     · about 25-30 Si. The rich slag from b reacts with intermediate semi-product with 25 Si from ladle c to produce the final low carbon ferrochrome alloy. The approximate power and raw material consumption for making a ton of low carbon ferrochrome by this process are as follows in some plants — Name of raw material Quantity / M. T.

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  • Implementation of industrial waste ferrochrome slag in

     · Ferrochrome slag is a waste material obtained from the manufacturing of high carbon ferrochromium alloy. This slag is formed as a liquid at 1700 °C and its main components are SiO 2 Al 2 O 3 and MgO. Additionally it consists of chrome ferrous/ferric oxides and CaO.

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  • FeCr production suffers due to unrestricted exports of

    The June high-carbon ferro-chrome tender price was set 900 per tonne. Major Chinese stainless steel producers lowered their July high-carbon ferrochrome tender prices to 862 per tonne. The continuing supply shortage of ore and alloy from South Africa could limit the price downtrend in the near term experts in China said recently.

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  • Commissioning and Operatingan InductionFurnace

     · Zimasco (KweKwe Division) produces 190 kl of high­ carbon ferrochromium (HCFeCr) per annum whcn running at full capacity. Considerable quantities of high-carbon ferrochromium smaller than 12 5 mill are generated when the initial high-carbon ferrochromium ingots from the electric-arcfurnaces are crushed and screened to meet customer s requirements.

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  • Uses For Ferrochrome Slagcommuting.es

    Ferro Chrome Slag Crushed Aggregates. Ferro chrome slag crushed aggregatescanepark. aluminium ferro-chrome ferro ferro-tungsten and ferro-titanium of high purity. aluminothermic other inert materials such as lime or crushed slag are . best technology to use for the ferrochrome slag.

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  • processing methods of ferrochrome slag Prominer

    Ferrochrome slag is a waste material obtained from the manufacturing of high carbon ferrochromium alloy. This slag is formed as a liquid at 1700 Â C and its main components are

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  • Sustainable solidification of ferrochrome slag through

     · Ferrochrome (FeCr) slag is a waste product from the carbothermic reduction of FeCr ore resulting in the production of high or low carbon FeCr alloy. It is estimated that the global annual production of FeCr alloy is between 12 and 16 Mt . It also is estimated that the FeCr slag to alloy production is 1.1–1.5 1 .

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  • Production Characteristics and Use of Ferrochromium

     · The slag products are mainly marketed in road and civil construction purposes but also in producing refractories. Normally crushed and screened slags are produced simultaneously when recovering alloy. The leachate of slag products is low and performance results are excellent. Slag products successfully replace natural sand and macadam.

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  • Production Characteristics and Use of Ferrochromium

     · The slag products are mainly marketed in road and civil construction purposes but also in producing refractories. Normally crushed and screened slags are produced simultaneously when recovering alloy. The leachate of slag products is low and performance results are excellent. Slag products successfully replace natural sand and macadam.

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