Process chromite arc

Process Chromite Arc

An Improved DC-Arc Process for Chromite Smelting

electrical energy usage higher than for a submerged arc operation smelting sintered pellets and preheated raw materials [1]. This shortcoming of the DC arc furnace may, however, be overcome by preheating the feed to the furnace in a fluidized bed or flash reactor. At present, the leading process for ferrochrome is that offered by Outokumpu [2].

Chromite Ore - an overview | ScienceDirect Topics

Chromite ore has a spinel structure with a general formula of (Fe,Mg)O.(Cr,Al,Fe) 2 O 3.The content of Cr 2 O 3 for metallurgical-grade chromite ore is in the range 42–55% and the chromium-to-iron ratio is higher than 1.5. These quantities determine the chromium content in the smelted chromium ferroalloys. Magnesium oxide and alumina are refractory at the smelting temperature and fluxed with ...

SOME ASPECTS OF THE PRODUCTION OF FERROCHROME …

fluxes. Mintek has developed and patented the smelting of chromite ores in DC electric open-arc furnaces; principally for the processing of ore fines of sizes less than 1 mm without the need for agglomeration. Since the inception of this process, the DC arc furnace test facilities at …

Chromium processing | Britannica

When chromite and lime are melted in an open electric-arc furnace and then contacted with ferrochrome silicon, a low-carbon (0.05 percent) ferrochromium can be obtained. In an alternate process, high-carbon ferrochromium is oxidized and then blended with additional high-carbon ferrochromium.

(PDF) DIRECT SINTERING OF CHROMITE ORE FINES FOR ...

DIRECT SINTERING OF CHROMITE ORE FINES FOR FERROCHROME PRODUCTION IN SUBMERGE ARC FURNACE ... It is a binder less process and produces semi-fused mass with a good cold strength as well as hot ...

Production of Ferro-Chrome – IspatGuru

Jul 10, 2018 · Chromite ore is reduced by coal and coke to form the Fe-Cr alloy. The heat for this reaction can come from several forms, but typically from the electric arc formed between the tips of the electrodes in the bottom of the furnace and the furnace hearth. This arc creates temperatures of about 2,800 deg C.

Optimization of Process Parameter for Smelting and ...

process in the submerged arc furnaces is highly energy intensive and hence a large portion of the total production costs is goes for energy consumption. The consumption of energy depends up on the quality of the raw materials used, ... of Chromite ore pellets and 13 kg of the nut coke for reduction

Post-mortem study of magnesia-chromite refractory used in ...

Post-mortem study of magnesia-chromite refractory used in the gas area of a Submerged Arc Furnace for the copper-making process Estudio post-mortem de refractario magnesia-cromita ubicado en la zona de gas de horno eléctrico de arco sumergido en la industria del cobre

Locating and Estimating Sources of Chromium

6 Flow chart for chromite ore-refining ..... 31 7 Flow chart of ferrochrome production by the electric arc furnace process ..... 35 8 Open electric arc furnace ..... 37 9 Semisealed electric arc furnace ..... 39 10 Sealed electric arc furnace ..... 40 11 Typical flow chart for the production of low-carbon ...

Production Process | Al Tamman Indsil FerroChrome L.L.C

ATIFC’s plant consists of two submerged arc furnaces, each of 24 MVA rating. The technology of the furnaces is modular in design, most modern, resulting in longer uptime of furnaces, hence optimizing the furnace operation and efficiency. Chromite lump ore, Chrome ore Briquettes, coke, quartz are mixed in a pre-calculated proportion.

AN IMPROVED DC-ARC PROCESS FOR CHROMITE SMELTING

AN IMPROVED DC-ARC PROCESS FOR CHROMITE SMELTING. ... developed the DC arc furnace process for the production of ferroalloys with the expressed objective of smelting ore fines

Ferrochrome - Wikipedia

Ferrochrome, or Ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy between chromium and iron, generally containing 50% to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the worlds ferrochrome is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.

Technology Innovations in the Smelting of Chromite Ore

chromite ore have spurred the innovations in the technologies used for smelting chromite ore. These technologies (Conventional smelting process, Outokumpu process, DC arc route, and Premus process) have been reviewed in this work. Premus process has been found to be the lowest-cost and most energy-efficient ferrochrome smelting

Production Smelting Technologies for Ferrochromium

The conventional process for producing high carbon ferrochromium by smelting chromite ore in a submerged arc furnace is reviewed and its limitations highlighted with regard to (a) product quality through impurity removal, and (b) high power consumption for a given raw materials supply. The trends towards (i) utilization of medium grade ore fines by

Low cost ferroalloy extraction in DC-arc T furnace at ...

The DC-arc process allows the direct use of chromite fines (< 6 mm, 90% < 1 mm) without the need for expensive agglomeration techniques (pelletizing). Furthermore, non-coking coal can be used as reduction agent, which is cheaper than using metallurgical coke. Note that in a DC-arc smelter

KINETICS OF CARBOTHERMIC REDUCTION OF SYNTHETIC …

Chromite is the main material for the production of ferroalloy and stainless steel. Nowadays, in order to gain a higher reduction degree and lower the energy consumption, chromite is often taken into pre-reduction before charged into the submerged arc furnace. Since the pre-reduction process is conducted

conventional metallurgical process of smelting of chromite ...

The conventional process for producing high carbon ferrochromium by smelting chromite ore in a submerged … chromite ores, the preliminary … in Electro Metallurgy of Steel … An Improved DC-Arc Process for Chromite Smelting – Pyro.co.za. Preheating and charring tests with chromite ores … the DC operation (anthracite vs. metallurgical ...

Direct reduced iron - Wikipedia

Hot direct reduced iron (HDRI) is DRI that is transported hot, directly from the reduction furnace, into an electric arc furnace, thereby saving energy. The direct reduction process uses pelletized iron ore or natural "lump" ore. One exception is the fluidized bed process which requires sized iron ore particles.

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