Technology Innovations in the Smelting of Chromite Ore
chromite ore (Xstrata, 2012). The technology involves three stages: sintering, pre-reduction, and smelting. Energy reduction, just as was observed in Outokumpu process, is achieved in the pre-reduction stage of the process. As it can be seen in Figure 6, the chromite pellets from the sintering stage are pre-reduced in a rotary kiln by roasting
Theoretical and practical aspects of T Cr(VI) in the South ...
Mined chromite ore, containing chromium in classic spinel mineral form, is the only commercially exploited source of chromium units. South Africa (SA) holds 72 to 80 per cent of the world's viable chromite ore reserves5,6,7. Based on 2007 statistics, the South African ferrochrome smelting industry produces approximately 46 per cent of the
Optimization of Process Parameter for Smelting and ...
3.3 Smelting of Chromite ore pellets having Cr/ Fe ratio 2.8 ratio 2.8 was carried out in a 100 KVA SAF. Furnace was pre-heated and charged with the charge mix which contains 40 kg of Chromite ore pellets and 13 kg of the nut coke for reduction of the Chromite ore pellets and 1.4 kg of the lime stone and
v117n11a9 SEM image processing as an alternative method to ...
and van Zyl, 2010; Naiker, 2007). If chromite pellets made from typical South African chromite ore are pre-reduced to approximately 45%, the SEC of the pelletized chromite pre-reduction process is approximately 2.4 MWh/t FeCr, which is the lowest of all FeCr production processes commercially applied (Kleynhans et al., 2017a; Beukes, Dawson, and van
filtering in pelletizing process of chromite ore
Iron ore pelletizing systems Iron ore pelletizing systems. Iron ore fines are agglomerated into pellets and then indurated using a furnace to create Filtering In Pelletizing Process Of Chromite Ore. Filtering in pelletizing process of chromite ore. chromite ore beneficiation processingDisclosed i
USE OF SINTERED PELLETS IN PRODUCTION OF HIGH …
2. PRODUCTION OF CHROME ORE SINTERED PELLETS A study was made of the available literature and some published papers on chromite pelletisation [2] to [7]. After this laboratory scale experiments were carried out on pelletisation. Past experience of the authors helped and production of chrome ore green pellets with requisite strength was easily ...
Pelletizing Process
iron ore. His process involved grinding taconite to remove gangues and upgrading the iron ore (i.e., an ore beneficiation process). The resultant high-grade ore is in the form of fine particles, as small as 0.1mm or less, which are not suitable for sintering. This issue led to the use of pelletizing. Pelletizing plants are expected to play an
Damring Formation During Rotary Kiln Chromite Pre ...
In the pelletized chromite pre-reduction process, raw materials (chromite ore, reductants, and clay binder) are dry milled, pelletized, and pre-heated, after which the pellets are fed into a counter current rotary kiln where chromite pre-reduction takes place. These hot, pre-re-duced pellets are then fed directly into a closed
v119n2a13 Recycling pre-oxidized chromite fines in the ...
with prereduced chromite pellets, as well as lumpy reductants and fluxes, and (iv) closed direct current (DC) arc furnaces fed with fine (typically 6 mm) chromite ore, fluxes, and reductants. Of particular interest for the present paper is the oxidative sintered pellet process, which is …
Study of Liquid Phase Formation during the Sintering of ...
chromite pellets (Outokumpu 2005). In this process the chromite ore is first ground to -200 mesh size in wet ball mill. The slurry from ball mill is filtered to get the desired moisture. The filter cake is then mixed with binder bentonite and palletised in disc pelletizer. The vertical shaft furnace is used for sintering of green pellets.
Study the effect of chromite ore properties on ...
Abstract Chrome ore properties play a critical role in various pelletisation subprocesses (grinding, filtering, pelletisation and sintering) and slight variation in ore properties significantly affect the whole pelletisation process. Three ore samples (sample-A, B and C) were collected from different working faces of a chromite ore mine. Experiments were carried out to find out the difference ...
Filtering In Pelletizing Process Of Chromite Ore
Filtering In Pelletizing Process Of Chromite Ore. Study the effect of chromite ore properties on gypsum calcining,gypsum calcining,ball mill.Chrome ore properties play a critical role in various pelletisation subprocesses grinding, filtering, pelletisation and sintering and slight variation in ore properties significantly affect the whole pelletisation process.
Filtering In Pelletizing Process Of Chromite Ore
Aug 01, 2008 · Chromite ore fines (0–25 mm) are commonly used to produce sintered pellets to use in ferrochrome production process. In the chrome ore pelletisation process chromite ore along with 4–5% coke is milled in the wet ball mill and filtered ore cake is mixed with bentonite and used for production of green pellets. Read More
FeaSIBIlI oF NIckel eracIoN FroM INdIaN chroMIe oerBrdeN B ...
was used to convert the raw materials (ore, coal and lime) in to fine powder of (<74 µm) size. Green composite chromite overburden ore pellets of 12 mm diameter were prepared with the addition of coal and bentonite for the solid state reduction. For the smelting reduction studies, chromite overburden pellets were made with varying basicity (0 ...
filtering in pelletizing process of chromite ore
Study of Liquid Phase Formation during the Sintering of. chromite pellets Outokumpu 2005 In this process the chromite ore is first ground to -200 mesh size in wet ball mill The slurry from ball mill is filtered to get the desired moisture The filter cake is then mixed with binder bentonite and palletised in disc pelletizer The vertical shaft furnace is used for sintering of green pellets...
PROCESS FOR THE PRODUCTION OF SODIUM CHROMATE FROM ...
The process of the present invention is directed to a method of obtaining solutions of sodium chromate from chromite ore. More particularly, the process is directed to a method for producing pellets of a mixture of chromite ore, soda ash and a refractory diluent, said pellets having sufficient strength to withstand the stress of handling and of ...
WO2015015250A1 - Process for enhanced pre-reduction of ...
The present invention relates to a process for the partial oxidation of unagglomerated chromite ore and to the use of the claimed process in currently applied ferrochromium production processes. According to a first aspect thereof, the present invention provides a process for the partial oxidation of chromite. The said process includes the steps consisting of: (i) providing a source of ...
Study the effect of chromite ore properties on ...
Chromite ore fines (0–25 mm) are commonly used to produce sintered pellets to use in ferrochrome production process. In the chrome ore pelletisation process chromite ore along with 4–5% coke is milled in the wet ball mill and filtered ore cake is mixed with bentonite and used for production of green pellets.
Development of Chromite Sinter from Ultra-Fine Chromite ...
The schematic of sintering in the pot sintering set up is given in Fig. 1. The 10 kg of sinter mix containing chromite ore fine, coke fine, and fluxes, were balled in a rotating drum (pelletizer) with the required quantity of water spray. The mixed mass gradually bonded to make balls (pellets…
An Improved DC-Arc Process for Chromite Smelting
injected. The thermal process of the POLCAL plant [3] was monitored with the aid of thermocouples and pressure-measuring points distributed in the equipment. The exhaust gas was cleaned in a bag filter. The calcined material was collected below cyclone 1. The fine dusts from the filter (~5% of feed) and the calcined material were weighed hourly.
The production process of chromite sand | HAIXU - Chromite ...
The scrubbing process of the logwasher facilitates the breaking down and effective removal of these clays from your chromite ore, introducing efficiencies to downstream processes. Tailings management The move to zero tailings is facilitated by the specification of a customised filter press which reduces waste and also ensures a significant ...
filtering in pelletizing process of chromite ore
pelletizing iron ore process. Pelletizing for chromite, manganese, or iron concentrate for ferroalloys and steel making processes kiln efficiencies FCT Combustion How iron ore pelletizing has recently gained new kiln efficiencies More stable kilns, improved productivity and enhanced process control are delivering more for the industry than ever before.
CA2919974A1 - Process for enhanced pre-reduction of ...
The present invention relates to a process for the partial oxidation of unagglomerated chromite ore and to the use of the claimed process in currently applied ferrochromium production processes. According to a first aspect thereof, the present invention provides a process for the partial oxidation of chromite. The said process includes the steps consisting of: (i) providing a source of ...
Chrome Ore Benefiion Process Hydrocyclone
Graphite Ore Beneficiation Process - Xinhai. Graphite ore process case in Vietnam. Leptite is the main ore type of graphite in Vietnam followed by graphite schist the middle crystalline flake is the main graphite beneficial mineral.For qualified quality of concentratetechnical staff of Xinhai make a comprehensively analysis of the raw ore property deciding to add a scavenging and a ...
Pelletizing Drum - Outotec
Outotec Pelletizing Drum is used to produce uniform agglomerates from fine materials. The feed material can be fine concentrate or waste material, for example from the iron making process. Pelletizing – for chromite, manganese, or iron concentrate for ferroalloys and steel making processes. Heap leaching – for agglomeration of ore fines ...
An INTRODUCTION 1. ABSTRACT process consists of wet ...
process consists of wet-grinding and filtering of chromite concentrate and coke fines, pelletising the filter cake with bentonite, and finally sintering the pellets into hard, fired pellets. The pellets ar e sintered in a new type of Outokumpu steel belt sintering furnace . The sintering furnace is a multi
Drying of Iron Ore Pellets - Analysis with CFD
The average diameter for iron ore pellets is about 12 mm and 99 % of all pellets have a diameter in the range 6.3 -16 mm and 70 % of these are, in their turn, within the interval 10-12.5 mm. Pellets can be indurated in shaft furnaces, in grate-kilns and on traveling grates. The principle of sintering pellets is almost the same in grate-kilns and
Study the effect of chromite ore properties on ...
Chromite ore pellets are used for ferrochrome production by the smelting reduction process. The strength and porosity of the sintered pellets play a significant role in smelting reduction.
SOME ASPECTS OF THE PRODUCTION OF ... - MINTEK | …
The chromite ore Cr/Fe ratio is of importance as it directly affects the alloy Cr grade whilst the gangue elements affect the melting energy and rate as well as the slag chemistry. The chromite spinel ore morphology can be described stoichiometrically as (Fe, Mg)(Cr,Al,Fe)2O4 and chromite ores often contain gangue elements of SiO2 and MgO.
filtering in pelletizing process of chromite ore
Home-filtering in pelletizing process of chromite ore Steel Glossary from A to Z Manusteelcn-China steel suppliers It is a two-stage process where lump ore, pellets or sintered iron ore, or a mixture of these, is firstly charged to a reduction shaft where it is transformed into direct reduced iron by …