Steelmaking slags (both iron slag and steel slag) are by-products during iron and steelmaking process and have the same properties in the carbonation [30].Table 1 demonstrates that the main chemical components of steel slag are CaO, S i O 2, MgO, A l 2 O 3 and F e 2 O 3 [31].Like many previous report, steelmaking slag is mainly …
China [9–11]. In the smelting process of ferrochrome alloy steel, the chromium-containing solid waste includes the slag and dust generated at an elevated …
As shown in Fig. 4, the stainless-steel production process includes ferroalloy production and stainless-steel smelting processes.In the chain of stainless-steel production, the ferrochromium and ferronickel alloys are the important intermediate products, which are produced by using a submerged arc furnace (SAF) process, so that a large number of …
Huge amount of ferrochrome slag, a solid waste is being generated from submerged electric arc furnace during manufacturing of ferrochrome alloy. The waste slag contains about 6-12% chromium as ...
The slag preparation method used in this study is almost the same as that described in previous papers (Du et al., 2017a, Du et al., 2018c).Two types of steelmaking slag containing Fe 2 O 3 and FeO, respectively, were synthesized using chemical reagents. The mixing ratios of the total Fe and other oxides of each slag were virtually the same.
The aim of this study is to demonstrate the potential of Cr (VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr (VI) …
slag (LC FeCr) and high carbon ferrochrome slag (HC FeCr) were evaluated. Comparison of the results of four real leachate samples is presented. Obtained final solid product was …
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 …
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 ...
As a type of metallurgical solid waste with a significant output, chromium-containing metallurgical dust and slag are gaining increasing attention. They mainly include stainless steel dust, stainless steel slag, ferrochrome dust, and ferrochrome slag, which contain significant amounts of valuable elements, such as chromium, iron, and zinc, as …
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 …
The ferrochrome slag used in the present study has been described in earlier studies focusing on recovery of the following residual minerals; (1) magnesium (Mashanyare, H.P. and Guest, R.N., 1997 ...
… 15-million agreement with Indian high-carbon ferrochrome producer Metkore Alloys & Industries Ltd. to recover ferrochrome from steelmaking slag. Harsco's alloy recovery … » Free Online Chat. Stock Market & Financial Investment News: Educated … Harsco announced its signing of a 7-year environmental solutions contract in India for the ...
Vlcek et al. [], Yi et al. [], and Mihok et al. [] have addressed the use of steelmaking slag, but very little focus was given to the reuse of LF slag as a flux in steelmaking.Most steel industries with LF in secondary steelmaking operations use synthetic slag/fluxes [].Characterization studies carried out on LF slags by a few …
China [9–11]. In the smelting process of ferrochrome alloy steel, the chromium-containing solid waste includes the slag and dust generated at an elevated temperature. In general, the production of each ton of high-carbon ferrochrome alloy results in the generation of about 1.1~1.6 tons of slag and 25 kg of dust [12–14].
Abstract Recently, microwave energy has attracted increasing interest for accelerating thermal reactions. This study investigated the impact of microwave heating on the zinc recovery rate from electric arc furnace (EAF) and chromium converter (CRC) dusts. The results indicated that microwave heating required a lower temperature to …
EDAX analysis of ferrochrome slag (Table 9) at different spots (Fig. 6d) shows a clear difference between major slag phases with minor specks of metal. Fe and Cr are the major elements in the metal. The major composition of slag in spots 3 and 4 is Si and Ca, while Al and Mg constitute only 5–7%.
The ferrochrome industry in. South Africa is the largest in the world. The slag to metal ratio of the ferrochrome process is. averaged to 1.5, therefore, for every ton of ferrochrome produced, 1.5 ...
Ferroalloy refining process is the smelting process that further refines the alloy produced by crude processing in submerged arc furnace or blast furnace, in order to obtain pure ferroalloy. Ferroalloy refinement includes: decarburization refinement of high-carbon ferromanganese and high-carbon ferrochrome which generates medium/low …
Ferrochrome slag (FCS) is a by-product of ferrochrome industries and is produced during the extraction of ferrochrome from chromite ore. The chemical composition of FCS comprises of 27–33% SiO2 ...
Ferrochromium slag is a by-product of ferrochromium production via the smelting of chromite ores. The mechanical properties of this slag make it a potential material to be used as an inexpensive construction material, the utilization of which can reduce the use of natural resources. Despite its potential use, ferrochromium slag is …
A number of papers have been published describing the characteristics of charge chrome slag and the methods for recovery of Cr from the slag. Recently, some commercial plants for recovery of Cr from charge chrome slag in India and South Africa were also reported (Khan et al., 2001, Salamon, 1995, Mashanyare and Guest, 1997). …
Abstract. 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 ...
The aim of this study is to demonstrate the potential of Cr (VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr (VI) concentrations of water contacted with ...
This paper reports the characteristics of ferrochrome slag and its feasibility as aggregate in refractories aiming to substitute refractory raw materials. Refractory castable specimens were formulated with ferrochrome slag as an aggregate and commercial calcium aluminate cement as a binder. Objective was to prepare refractory …
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.
Chromium was successfully separated from synthesized stainless steel slag (CaO–SiO2–MgO–Cr2O3) through the addition of waste silicon powder and CaF2. Waste silicon powder shows a promising and environmentally friendly reductant, compared to carbon, achieving the transformation of chromium from stainless steel slag to dispersed …
The dump at Zimasco, containing 4.5 million tons of slag justified that the construction of a metal from slag recovery plant to treat about 170 t/h was appropriate if a suitable process could be developed. The dump contained high carbon ferrochrome alloy (HCFC) valued at that stage at about 1500 million Zimbabwe Dollars.