Studies were carried out at R&D, Tata Steel to develop a flow sheet for the recovery of metal from metal–slag mix generated in its charge chrome (ferrochrome with 50–60% chromium) plant, Bamnipal.

Ferro chrome slag may contain chromium in +3 and +6 oxidation states. Separation and determination of chromium content of the slag samples collected from Jindal Ferro Alloys Corporation, (Kottha...

the right slag composition. The slag composition is tested every day by sampling and analysis. The typical ferrochrome slag composition is 30 % SiO 2, 26 % Al 2O3, 23 % MgO and 2 % CaO. The chrome content in the slag is about 8 % and the iron content 4 % respectively. Ferrochrome slag is acid. Its basicity is 0.8 when it is calculated by ...

High carbon ferrochrome refining method is to refine high-carbon ferrochrome with chrome ore. in addition, oxygen can be used to refine low-carbon ferrochrome. If low-carbon ferrochrome with chrome ore concentrate is used, the slag in the refining furnace has large viscosity and high melting point.

chromium content of the slag samples collected from Jindal Ferro Alloys Corporation, (Kottha valasa, Visakhapatnam Dt.) has been carried out following extraction with benzene solutions of TOAO(0.01M). Maximum extraction efficiency was achieved at pH 2.5M in presence and absence of impurities associated with ferrochrome slag.

The alloy content in the slag is substantial and comprises typically 1% to 4% of the total alloy tapped. It is therefore normally viable to attempt recovery of this alloy from the slag. The most common recovery process is to crush the slag (in the case of the first slag-handling method) and recover the alloy particles in a wet jigging process.

Key words: low-carbon ferrochrome, chemical composition, aluminum-silicon-chrome, reductant, recovery. INTRODUCTION Multi-component FASCh alloy is used for deoxida-tion and doping of steel and for recovery of LCFC. An notable factor of chrome alloys smelting with FASCh is radical alteration of slag composition leading to stabili-

In slag analysis the total Cr in slag is expressed as Cr203 which varies from 12 to 16% and the slag volume varies from 1 to 1.2 times the weight of metal produced, depending on the gangue constituents in chrome ores and ash content in the reductants used in the process. For each tonne of HC FeCr about 2.35 tonnes of Chromite ores are required.

The silicon content in conventional high carbon ferrochrome is normally below 2%, whereas the thermodynamic equilibrium allows charge chrome larger flexibility in terms of silicon content, which can vary between 2% and 5%. The silicon content in the alloy is dependent on the chosen production technology route and the selected slag operating regime.

The waste slag also has a higher Cr2O3 content of 3 percent as compared to <1 percent in the Perrin process. In the Simplex process, finely divided HCFeCr is reacted with finely divided oxidants such as Cr2O3, iron oxide, chrome ore, SiO2 or oxidized HCFeCr under 2 torr pressure for 25 hours to produce LCFeCr.

These phases are either entrapped in the silicate minerals or are present as free liberated grains within the slag sample. The platinum content varies in the range of 1.24–1.95 wt% whereas gold ...

This recovery is achieved by: • Mining the slag material directly from the dump. • Breaking the slag into smaller pieces in a crushing and screening system, releasing the locked metal from slag separating the slag into three size fractions. • Separating the liberated metal and slag by means of a gravity separation process, using two jigs ...

Comprehensive analysis of the effect of silicon content in alloy (see Fig. 1) and slag basicity (see Fig. 3) on the degree of chromium reduction from oxide melt confirms the possibility of obtaining slag with a content up to 6.0% Cr 2 O 3 and basicity 1.3–1.4 during preparation of low-carbon ferrochrome containing not less than 5% Si ...

Slags produced in the steelmaking industry could be a source of chromium. Slags contain, depending on different types of slags, between 2 to 5 wt.% of Cr. Roasting of slag with NaOH, followed by subsequent leaching can produce leachates which can be efficiently processed using electrocoagulation (EC). This paper provides results from the EC process …

Beneficiating of ferrochrome slag waste material is envisaged as a means of achieving sustainable recovery of magnesium (Mg). Previous studies have used sulphuric acid as a lixiviant for leaching at low temperatures to recover Mg from ferrochrome slag.

crusher suitable for ferrochrome slag crushers suitable for ferrochrome slag crushers suitable for ferrochrome slag Hot slag content recovery Check price Ferro Chrome Slag Crushed Aggregates Ferrochrome slag is a waste full spiral recovery plant ferrochrome a process of crushing and wet screening as well as undesired Sulphur Content .

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 . In Europe, steelmaking slags are used predominantly as aggregates in road construction (46%), with smaller quantities used in metallurgy or as fertilizer.

Ferrochrome Ferrochrome (FeCr) is an alloy of chromium and iron, generally containing 48 to 70% chromium by weight. It is produced in an electric arc furnace by the reduction of chromite ore. South Africa has the largest reserves of chromite ore and is also the world's largest producer of Ferrochrome with most production being exported to China.

To improve total ferrochrome recovery while maintaining a high-quality product, alloy recovery plants are utilised to recover the ferrochrome from the slag produced during the charge chrome process. The slag, which has a metallic content of approximately 4 percent, is processed through a series of crushers and broken down to minus 15mm material.

Ferrochrome smelting slag processing line is mainly to recover the valuable ferrochrome alloys from the slag in a forms that will be as far as possible directly saleable. This production line is now producing saleable ferrochrome containing less than 2% slag at a recovery of over 96% of liberated metal.

PROBLEM TO BE SOLVED: To provide a method for recovering chromium in slag by which chromium oxide contained in the slag developed when molten stainless steel is subjected to decarburization refining, is efficiently reduced and recovered in the molten stainless steel and the lowering of the chromium contained in the slag is performed and the recycling of the slag can …

Ferrochrome slags were considered as poorly studied industrial wastes, the main building material, a mixture with cement and fly ash for low-strength materials [].The chemical and mineral compositions of the slag containing about 43% aluminosilicate compound, 24.94% magnesium oxide, and 19.46% chromium oxide (Cr 2 O 3) as the main components were …

At Tata Steel Ltd, Bamnipal, India, the recovery of metal values from ferrochrome slag has been successfully carried out by jigging [5]. A commercial jig plant has been installed in South Africa ...

Ferro chrome slag may contain chromium in +3 and +6 oxidation states. Separation and determination of chromium content of the slag samples collected from Jindal Ferro Alloys Corporation, (Kottha ...

the slag volume varies from 1 to 1.2 times the weight of metal produced, depending on the gangue constituents in chrome ores and ash content in the reductants used in the process. For each tonne of HC FeCr about 2.35 tonnes of Chromite ores are required. The average Cr203 content in the ore is about 45%.

World HCFeCr production is 6.0 million tonnes. Correspondingly 1.1-1.6 t slag / t FeCr is produced depending on the raw material basis. Essentially all FeCr is produced in submerged arc furnaces, while the role of competitive technologies like DC is limited. In all furnaces fluxes are used to optimize the slag composition. Vital characteristics are smelting point, electric …

Six commercial plants have been built and are now operating, one of which is at Zimasco's ferro-chromium smelting complex in KweKwe, Zimbabwe. This plant is now producing saleable ferrochrome containing less than 2% slag at a recovery of over 96% of liberated metal Previous article Next article Keywords Gravity concentration environmental

It's usually used in AOD converters to produce alloyed steel grades. Due to environmental restrictions, ferrochrome is commonly produced in closed, stationary furnaces. For chromium alloys with medium and low carbon content, special slag metallurgy is required to achieve a high chromium yield.

To improve total ferrochrome recovery while maintaining a high-quality product alloy recovery plants are utilised to recover the ferrochrome from the slag produced during the charge chrome process. The slag which has a metallic content of approximately 4 percent is processed through a series of crushers and broken down to minus 15mm material.

Ferrochrome slag has the following chemical composition, wt.%: SiO 2 5.6, Al 2 O 3 54.8, Fe 2 O 3 1.85, CaO 13.8, MgO 14.7, Cr 2 O 3 5.3, R 2 O 2.3. The phase composition of slag is represented by aluminates CaO·Al 2 O 3 and 12CaO·7Al 2 O 3, and also aluminomagnesia chromium-containing spinel.