A Decarbonization Approach for FeCr Production
As a result of EAF-assisted semi-pilot metallothermic smelting, the highest chromium content in produced alloys was 59.5 wt. %, while the highest chromium recovery from chromite concentrate to alloys was 76.7 wt. % in these experiments. ... and impurities by using Indian chromium ore (59.2% Cr 2 O 3) as the starting material. As a result ...Web
اقرأ أكثرProcessing of Low-Grade Chromite Ore for Ferroalloy
The low-grade siliceous chromite ore from Ghutrigaon, Odisha, India, containing ~ 16% Cr2O3, with Cr/Fe ratio of 1.97 and ~ 55% of SiO2, does not find any use in metallurgical industry and hence considered as waste. Mineralogical investigation indicates the presence of chromite and quartz as major minerals with minor fuchsite and …Web
اقرأ أكثرDirect chromium alloying by smelting reduction of mill scale and …
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 …Web
اقرأ أكثرThe prereduction and smelting of chromite concentrate of low …
50 per cent (with 10 per cent carbon plus silicon) can be produced from an ore with a chromium-to-iron ratio of 1,35, even if the chromium recovery is only 93 per cent of the …Web
اقرأ أكثرSamancor Chrome Mines
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 …Web
اقرأ أكثرExploring Chromium Ore Consumption: New Perspectives from
Chromium ore is an important metallic raw material that is widely used in the metallurgy industry, chemical industry, and refractory. Clarifying the consumption mechanism of chromium ore is crucial for policy making, enterprise production, and commodity investment. Based on the signal decomposition tool and S-curve model, a …Web
اقرأ أكثرChromium Ore
Chromium Ore. Knowledge of the chromium ore minerals proper and their associated rocks-forming minerals is needed to explore new chromite fields and to predict the …Web
اقرأ أكثرChromium processing | Extraction, Uses & Applications
If carbon and Cr2O3 are combined in a molar ratio of 3:1 and subjected to increasing temperature, a number of oxidation-reduction reactions will ensue that will produce first …
اقرأ أكثر"Utilization of low grade chromite ore fines to recover chromium …
In the comparative study in identical condition, the chromite sinter showed much better metallic yield (76%) and higher chromium content (54.6%) in the produced ferrochrome than the lump ore (70 ...Web
اقرأ أكثرXianfeng Hu Pint III
the smelting reduction of chromite ore in the SAF. The specific electric energy consumption by this route is 3.5-4.0 MWh per tonne of ferrochrome; [2] the yield of chromium from the chromite ore is approximately 80-85 wt.% [3] or 84-88 wt.%. [4] To produce 1 tonneWeb
اقرأ أكثرSelective Smelting Reduction of Metal Oxides in REE-Nb-Fe Deposit
Bayan Obo ore in the Inner Mongolia region of North China is a rare multimetallic mine that has 1.4 billion tons of Fe, 1 million tons of Nb 2 O 5, and > 40 million tons of rare-earth element (REE) minerals. 1 It accounts for 35% of the world's REE reserves and 5.5% of the world's Nb reserves. 2,3,4 Similar REE-Nb-Fe deposits are also found in …Web
اقرأ أكثرEffect of Titanium on the Smelting Process of Chromium-Bearing …
This study discusses the smelting behaviors of chromium-bearing vanadium titanomagnetite pellets (CVTP) with TiO2 additions. The results show that the softening start temperature T10% increases from 1148°C to 1215°C, and the softening end temperature T40% increases from 1280°C to 1336°C. The melting start temperature TS …Web
اقرأ أكثرEfficient utilization of nickel rich Chromite Ore Processing Tailings
1. Introduction. Chromium finds diverse application in the refractory, pharmaceutical, metallurgical and casting industries (Aljerf, 2018; Tathavadkar et al., 2004).Among 82 distinct ore forms of chromium as an element, chromite (FeCr 2 O 4) is the only form that is extracted at a commercial scale (Motzer and Engineers, …Web
اقرأ أكثرSmelting Process of Chromite Ore Fines to Produce Crude Fe
The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study. In the experiments, for each heat, liquid steel melt (metal pool 1 kg) was prepared in a 3--capacity laboratory-scale electric arc furnace for the absorption of reduced metals like chromium, nickel, etc., …Web
اقرأ أكثرPickling Sludge Using Smelting Reduction
Abstract: This paper reports the recoveries of iron, chromium, ... high phosphorus oolitic hematite iron ore; coal-based; smelting reduction ... the yield of pickling sludge is about 2,440,500 ...Web
اقرأ أكثرSmelting characteristics of fluxed chromite sinter and its …
In the comparative study in identical condition, the chromite sinter showed much better metallic yield (76%) and higher chromium content (54.6%) in the produced ferrochrome …Web
اقرأ أكثرSmelting Process of Chromite Ore Fines to Produce Crude …
chromium present as FeCr 2O 4 in the ore. Chromium does not exist in the free form. 2.2 Methods In the smelting experiments, for each heat, liquid steel melt pool was prepared in a 3-kg-capacity laboratory-scale plasma arc furnace to act as a liquid metal bath for absorption of reduced metals like chromium and nickel from the chromite ore. The ...Web
اقرأ أكثر(PDF) Optimization of Process Parameter for Smelting and …
The details of the smelting, alloys and slag produced were given in the following section. 3.1 Smelting of chromite ore pellets having Cr/ Fe ratio 2.4 Based on the calculation made for the charge mix, smelting reduction of chromite ore pellets containing Cr/ Fe ratio 2.4 were carried out in 100 KVA SAF as shown in figure 3.1.Web
اقرأ أكثرv118n6a15 Fluxing of South African chromite ore with …
If, for example, the composition of the ore is expressed as a mixture of ideal spinel minerals, the LG6 type ore composition could be recalculated to be approximately 21.3% MgAl2O4, 23.3% MgCr2O4, 42.2% FeCr2O4, 12.6% Fe3O4, and 0.6% SiO2. The purpose of smelting is to reduce most of the Cr2O3 in the MgCr2O4 and FeCr2O4 spinel phases to Cr and ...Web
اقرأ أكثرOptimization of Process Parameter for Smelting and …
Ferro-chrome from the chromite ore pellets having Cr/Fe ratio 2.6. Calculation of the charge mix for the Cr/Fe ratio 2.6 indicate that for smelting reduction of 40 kg pellets 14.4 kg of the nut coke will required for the complete smelting reduction of the chromite ore pellets. To maintain the 1.0 basicity of theWeb
اقرأ أكثرSmelting chrome ore
The objective of chrome ore smelting is to convert the chromium into a form that can readily be used by the steelmaker. Although chrome has been smelted in blast …Web
اقرأ أكثرSimulation and experimental research on top blown burner lance …
Chrome ore smelting reduction process in converter for crude stainless steel production has won increasing attention because of utilizing cheap chrome ore as raw material instead of ferrochromium alloy, which can reduce the production cost significantly. Thermodynamic and kinetic mechanisms of chrome ore smelting reduction have been …Web
اقرأ أكثرFluxing of South African chromite ore with colemanite
SYNOPSIS. South African chromite ores are smelted using SiO 2 - and CaO-containing fluxes, normally as quartz and limestone respectively. The purpose of SiO 2 is to lower the melting point of the ore, while CaO is added to ensure that the slag that forms on smelting is fluid enough to enable slag/alloy separation and tapping from the furnace.Web
اقرأ أكثرThermodynamic Analysis on the Reduction Smelting of
The thermodynamic analysis on the reduction smelting of stainless steel pickling sludge was reported in this paper. The predominance area diagram of Fe–Ni–Cr–C–O system, and phase diagrams of CaF2–SiO2–CaO–Al2O3–MgO system were first thermodynamically constructed. The effects of temperature, CaF2 content, and …Web
اقرأ أكثرDevelopment of Heated Ore Addition Technology Using …
Corporation.1–3) 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 chro-mium 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 isWeb
اقرأ أكثرProduction of Ferro-Chrome – IspatGuru
Ferro-chrome (Fe-Cr) alloy is essential for the production of stainless steel and special steels which are widely used and are of high quality, typically characterized by a high corrosion resistance and a low tendency to magnetization. The processing cycle of Fe-Cr involves the chemical reduction of the chromite ore. Smelting of HC Fe-Cr ferro ...Web
اقرأ أكثرSolving Iron Ore Quality Issues for Low-Carbon Steel
Iron ore quality a potential headwind to green steelmaking: Technology and mining ... could affect production yield, and increase electricity consumption and slag volume in an EAF. In DRI-EAF processes, the metallic impurities including copper (Cu), chromium (Cr), nickel (Ni) and vanadium (V) should ideally be at a minimum as they hinder the ...Web
اقرأ أكثرSimulation and experimental research on top blown burner lance …
To reveal the smelting reduction mechanism of chromium ore for producing stainless steel in converter, the dissolution behaviour of chromium ore in CaO-SiO(2)-MgO-Al(2)O(3) slag system was studied ...Web
اقرأ أكثرCN1743476A
Compare with prior art, in the tradition blast furnace smelting process, furnace temperature can reach about 1700 ℃, contained chromium is many in the nickel oxide ore exists with the chromium sesquioxide form, the fusing point of chromium sesquioxide is about 2300 ℃, so the reducing degree of chromium is limited in the nickel oxide ore, it is mobile …Web
اقرأ أكثرEffect of SiO2 addition to chromite ore, on the
In the comparative study in identical condition, the chromite sinter showed much better metallic yield (76%) and higher chromium content (54.6%) in the produced ferrochrome than the lump ore (70 ...Web
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