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chromium smelting yield from ore

Chromium Ore an overview ScienceDirect Topics

In this steelworks, stainless steel is produced by smelting reduction process of chromium ore with hot metal produced at a BF in a specialized converter-type furnace. Stainless steel dust containing Cr and Ni is generated from this smelting process. STAR process treats such dust and Fe–Cr–Ni metal is recovered and recycled at stainless steel production. Figure 4.4.21 shows the schematic

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Chromium processing Britannica

In 1893 Henri Moissan smelted chromium ore and carbon in an electric furnace ores from Zimbabwe with a higher chromium-iron ratio yield a product that is 63–67 percent chromium, 5–7 percent carbon, and 3–6 percent silicon. During the smelting of high-carbon or charge ferrochromium, slag and metal are tapped from the furnace into a ladle and separated by decanting or skimming. The

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Smelting chrome ore ScienceDirect

01/01/1976· The objective of chrome ore smelting is to convert the chromium into a form t h a t can readily be used by the steelmaker. Although chrome has been smelted in blast furnaces, it more commonly is reduced in submerged-arc electric furnaces. The arc furnace is better suited to deal with the refractory nature of the gangue associated with the ore, to supply the large amounts of energy

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EP0799899B1 Chromium ore smelting reduction process

Chromium ore smelting reduction process Download PDF Info Publication number EP0799899B1. smelting reduction particle size vessel Prior art date 1995-09-28 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Lifetime Application number

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EP0799899A1 Chromium ore smelting reduction process

In this invention, the smelting reduction operation can be carried out in a high efficiency by charging a carbonaceous material in such an amount that total surface area is not less than 60 m 2 per 1 ton of slag weight. Furthermore, carbon substance finely particulating through thermal crumbling under a high-temperature atmosphere inside the vessel is used as the carbonaceous material, whereby

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Chromium Mining Processing Equipment Flow Chart

The only ore of chromium is the mineral chromite and 99 percent of the world’s chromite is found in southern Africa and Zimbabwe. Geologists estimate that there are about 11 billion tons of mineable chromite ore in the world, enough to supply the current demand for hundreds of years. It is mostly used for making stainless steel and other metal alloys. Type: Crystal System: Element (Minerals

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Chrome Ores on Ferrochrome Smelting

of ore types on the smelting processes, such as the consumption of fluxes, reductant; and most importantly, the consumption of electricity. The electric energy consumption is highly related to the SiO 2 content of chrome ores. The lowest electric consumption of 3.31 MWh/t is required when the SiO 2 % of chrome ores is 6%. Considering the fact that the other contents do not change much in the

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Study and Design of Chromium Ore Smelting Reduction

Study and Design of Chromium Ore Smelting Reduction Process for Producing Stainless Steel in a Converter p.164. Design and Application of Multi-Well Automatic Metering and Remote Monitoring System p.168. Influence of Manufacturing Errors on Performance of Optical Power Splitter p.173. Study on Quick Testing Instrument for Automobile Fuel Consumption p.178. A New Type Auto-Reclaim

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Optimization of Process Parameter for Smelting and

taken for the chemical analysis to find out the yield of the smelting and extent of the chromium in the Ferro-chrome. Slag sample were taken out from the furnace after cooling the furnace and sent for the chemical analysis to analyse the oxides present in the slag. The alloy and slag sample collected after smelting is shown in figure 3.3. From the chemical analysis of the Ferro-chrome sample

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Samancor Chrome Mines Mining Technology Mining

Samancor’s operations are centred on reserves held in the Bushveld layered intrusive complex, which contains approximately 70% of the world’s economic chrome ore reserves in the Lower Group (LG) 6 and Middle Group (MG) 1 seams. LG6 has a Cr2O3 content of 43-47% and a Cr:Fe ratio of 1.6:1, while MG1 averages 42% Cr2O3 and a Cr:Fe ratio of 1

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Smelting chrome ore ScienceDirect

01/01/1976· The objective of chrome ore smelting is to convert the chromium into a form t h a t can readily be used by the steelmaker. Although chrome has been smelted in blast furnaces, it more commonly is reduced in submerged-arc electric furnaces. The arc furnace is better suited to deal with the refractory nature of the gangue associated with the ore, to supply the large amounts of energy

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Direct chromium alloying by smelting reduction of mill

The experimental results show that steel scrap can be alloyed with chromium by the chromite ore in the briquettes and the Cr yield from the chromite ore increases with the increase in mill scale

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Direct chromium alloying by smelting reduction of mill

In this paper, iron high-Cr alloy was produced by a direct alloying with chromium in carbo- thermal reduction using fine of low grade chromites ore and mill scale. The smelting experimental heats were carried out in a 5 kg pilot plant submerged electric arc furnace. The charging materials and reduction parameters were varied and the optimum conditions for obtaining alloy with the highest

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Kinetic Study on Smelting Reduction ofChromite Ore

Smelting reduction ofchromite ore was studied in systems and conditions related to ferrochromium production in submerged arc furnace. Dissolution ofchromite pellets or lumpy ore as well as reduction ofiron, chromium and silicon oxide were studied by immersing chromite samples in a slag melt in a graphite crucible. Experiments were performed at temperatures from 1650°C to 1750°C. Kinetics

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Chrome Ores on Ferrochrome Smelting

of ore types on the smelting processes, such as the consumption of fluxes, reductant; and most importantly, the consumption of electricity. The electric energy consumption is highly related to the SiO2 content of chrome ores. The lowest electric consumption of 3.31 MWh/t is required when the SiO2% of chrome ores is 6%. Considering the fact that the other contents do not change much in the

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Reduction Feature and Selection Principle of Chromium

The chemical compositions of the available chromite request the relatively high contents of chromium and iron, the lower contents of Al2O3, MgO and P in gangue and the lower Cr/Fe ratio in keeping with the case of high chromium. Chromoium ore in South Africa is considered to be suitable for smelting stainless steel crude melts in a smelting

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DIRECT CHROMIUM ALLOYING BY CHROMITE ORE WITH THE

DIRECT CHROMIUM ALLOYING BY CHROMITE ORE WITH THE PRESENCE OF METALLIC IRON X. Hua, H. Wangb,*, L. Tenga, composition of the slags to ensure high yield of chromium in the final products; and chromium yield can reach 90%. Key words: Direct alloying; Chromite ore; Stainless steel; Thermogravimetric analysis. * Corresponding author: [email protected] Journal of Mining

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Process for smelting reduction of chromium ore

16/03/1999· A smelting reduction process of chromium ore by charging a carbonaceous material and a chromium ore into hot metal admitted in a metallurgical reaction vessel such as a converter or the like, feeding an oxygen gas to burn the carbonaceous material and conducting fusion and reduction of the chromium ore through heat of combustion to produce a chromium-containing molten metal, wherein

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Development of Heated Ore Addition Technology Using Burner

chromium ore that can be used in the smelting reduction furnace. In this process, the chromium oxide in the ore is reduced by carbonaceous materials which are added in the furnace. As the reaction is endothermic, it is necessary to increase the heat supply to the furnace in order to increase use of chromium ore.4) A variety of techniques have been examined with the aim of increasing the heat

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Samancor Chrome Mines Mining Technology Mining

Samancor’s operations are centred on reserves held in the Bushveld layered intrusive complex, which contains approximately 70% of the world’s economic chrome ore reserves in the Lower Group (LG) 6 and Middle Group (MG) 1 seams. LG6 has a Cr2O3 content of 43-47% and a Cr:Fe ratio of 1.6:1, while MG1 averages 42% Cr2O3 and a Cr:Fe ratio of 1

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