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Oct 22 2020018332Production of stainless steel ingredient ferrochrome involving smelting chrome ore in a furnace is highly powerintensive and South Africas unreliable electricity supply has pushed up costs hurting the industry The cabinet also proposed energy efficiency technologies on smelters and cogeneration and selfgeneration technologies as
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2015 Direct chromium alloying by smelting reduction of mill scale and low grade chromite ore Ironmaking amp Steelmaking Vol 42 No 9 pp 6486554381
Experiments of smelting reduction of chromium ore by using 5 t test converter have been made to produce chromium containing hot metal for stainless steelmaking Special interest was focused on3613
have focused on the smelting process In some cases losses of chromium to the slag in the form of metal drops small particles of ore or soluble chromium oxide may be considerable II is well known lhat lhe reducibility and melting behaviour of chromite ores are the important factors affecting the chromium yield and more and more3398
Mar 16 1999018332A 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 a3785
AbstractChrome ores from six locations across the Bushveld Igneous Complex in South Africa are used to investigate the effects 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 SiO24261
Corporation13 Chromium ore is used as the chromium source for stainless steel as an alternative to chromium alloys In order to improve flexibility in the choice of chromium resources it is important to increase the amount of chromium ore that can be used in the smelting reduction furnace In this process the chromium oxide in the ore is4057
The solution of chromium powder briquetting Cr powder pelleting and blast furnace smelting process Chromium powder briquetting production line process 1 chromium powder chromium powder is one of the most important metal powder in the metallurgical industry The amount of chromium powder in powder metallurgy production is relatively large4329
It is possible to promote the smelting reduction of chrome ore or pretreated materials by utilizing the large amount of slag formed View and chromium yield can reach 903941
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 lowestcost and most energyefficient ferrochrome smelting3902
The gangue present in a chromium ore has a significant effect on the temperature of the smelting zone thereby influencing the carbon content of the ferroalloy An ore having a relatively high MgO content will require a higher smelting temperature as can be seen from the ternary phase diagram for AlO SiOMgO system in Fig 23500
May 11 2020018332The Covid19 lockdown on South African mining and smelting resulted in a surge in both chrome ore and alloy prices In the medium term we expect to see a fall in terms of ore availability because of social distancing measures slow rampups and a weaker demand outlook4492
Dec 30 1997018332Another feature of the invention is for the total chromium yield being at least 70 at the end of postcombustion Another feature of the invention is for the aforesaid oxygenbound metal being from the group consisting of raw chromite ore chromite ore concentrate partially metallized chromite ore and chromium oxide dust3600
Use for smelting in General aluminum within the ratio of 110120 to stoichiometric recovery of oxide ore of chromium delivers targeted regulation of the level of recovery and transition in the alloy of silicon in the range of 515 wt from the set with the charge depending on the desired composition of ferrochrome and the actual content of3990
In the comparative study in identical condition the chromite sinter showed much better metallic yield 76 and higher chromium content 546 in the produced ferrochrome than the lump ore 703254
Chromite ore is available in nature mainly in the form of Cr2O3FeO which contains 40 52 Cr2O3 and 15 20 FeO by weight Global annual output of chromite ore is approximately 20 Mt which has4990
JFE Steel has adopted the convertertype chromium ore smelting reduction method13 as its stainless steelmaking process Since chromium ore is used as a substitute for ferrochromium alloys in this process it is important to increase unit utilization of chromium ore so as to improve flexibility in the selection of chromium raw materials3671
chromium units in the form of chromite ore concentrates which would be cheaper than the conventional alloys of chrome and iron produced by a submerged arc electric smelting step Further cost reductions and energy savings would be achieved by utilising the chromeiron4833
Aug 17 2020018332Retrieved from quothttpsfarmtownwikiindexphptitleChromiumOreampoldid2407quot4537
Sep 23 2012018332Pure chromium metal is prepared from the ore chromite The ore is converted into sodium dichromate Na2Cr2O7 which is then reacted with carbon to form the oxide Cr2O3 Reaction of the oxide with aluminum metal yields the chromium metal Cr2O3 2 Al Al2O3 2 Cr If you reacted 500 g of Cr2O3 molar mass 1520 gmol with 200 g of aluminum molar mass 270 gmol the4065
These yield little gold and the silver which is obtained mainly as a byproduct from the smelting of zinc ore concentrates and in the US has been obtained chiefly from deposits in Nevada Montana and Arizona If you havent seen my original crystal nugget page4523
Recently a number of efforts have been made to produce a crude stainless steel melt by direct smelting of ironchromium ore in a basic oxygen furnace BOF without use of ferrochromium alloys in order to save electric energy and production costs In this paper the thermodynamics for reduction of ironchromium ore by carbon is discussed3014
Nickel smelting Extraction and purification Nickel is recovered through extractive metallurgy it is extracted from its ores by conventional roasting and reduction processes that yield a metal of greater than 75 purity In many stainless steel applications 75 pure nickel can be used without further purification depending on the composition of the impurities4839
where S is the foaming index H is the foam height and V g is the superficial gas velocity 30 it is possible to calculate the potential slag height generated during smelting For a typical bath smelting slag with a low FeO content the foaming index has a value of approximately 2 31 Calculations based on the iron oxide content of the pellet predicted that the slag should foam to a height3283
Oct 22 2020018332Production of stainless steel ingredient ferrochrome involving smelting chrome ore in a furnace is highly powerintensive and South Africas unreliable electricity supply has pushed up costs hurting the industry The cabinet also proposed energy efficiency technologies on smelters and cogeneration and selfgeneration technologies as3975
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