In this study, the recovery of Mg from ferrochrome slag was investigated using hydrochloric acid (HCl) as the lixiviant at low temperatures. Previous studies …
In this study, thermodynamic calculations are performed to discuss the effect of various additives (MgO in magnesite, Al 2 O 3 as bauxite, and SiO 2 in quartz form) …
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. The studies showed that in the case of the charge chrome plant, crushing of mixed metal and slag to below 10 mm followed by jigging of …
The ever-increasing demand for ferrochrome alloys has resulted in a substantial accumulation of ferrochrome slag by-products in many mining areas. On the other hand, the ferrochrome slag has been identified as one waste material that is rich in magnesium (Mg) and has not been effectively exploited. Beneficiating of ferrochrome slag (FCS) …
Ternium Mexico; Tezcan Galvanizli Yapı Elemanları A.Ş ... products company Harsco Corporation announced the signing of a 7-year environmental solutions contract in India for the recovery of ferrochrome from steelmaking slag. At the anticipated recovery levels, the contract with India's Metkore Alloys & Industries Ltd. is valued at close to ...
With the optimum reductant addition and slag condition, chromium recovery and metallic yield of similar to 82% can be attained, and ferrochromium alloy containing 66% chromium and 7% carbon can be ...
Chromium-bearing slags produced during the stainless-steel smelting (SSS) are important recyclable secondary resources. Recovery of chromium from these slags …
In pyrometallurgy process involving drying, calcination and reductive smelting steps, Saprolite ore is subjected in an electric arc furnace to produce Fe–Ni alloy and Ni matte. To optimize the nickel smelting step, the slag consisted of MgO–SiO2–FeO and having a lower viscosity and high fluidity is required. In this study, a number of new …
Semantic Scholar extracted view of "The recovery of ferrochrome from slag at Zimasco" by H. P. Mashanyare et al. ... 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, ...
slag (EAFS) (0.82% of Cr), low carbon ferrochrome slag (LC FeCr) (1.10% of Cr) and high carbon ferrochrome slag (HC FeCr) (11.21% of Cr). EAFC, EAFS, HC FeCr slags had grain size <1 mm while LC FeCr slag had grain size of 2–4 mm (In further texts, these marks will be used for leachates of
The CHROMIC project (effiCient mineral processing and Hydrometallurgical RecOvery of by-product Metals from low-grade metal contaIning seCondary raw materials) aims to recover chromium from …
The world of stainless steel production was 52 Mt in 2019, and the annual amount of slags including electric furnace, AOD converter, ladle, and casting tundish, was estimated at 15–17 Mt. Nowadays, only a minor fraction of slags from stainless steel production is utilized and a major part goes to landfilling. These slags contain high-value …
In this study, the recovery of Mg from ferrochrome slag was investigated using hydrochloric acid (HCl) as the lixiviant at low temperatures. Previous studies have shown that various metal oxides have been proven to be more amenable to leaching using HCl. This study examined the effects of acid content, leaching temperature, and reaction …
To minimize the ecological hazards and retrieve the value of steelmaking slag, proper treatments are necessary, including reductions of f -CaO (free lime), γ -Ca …
Energy and Material Recovery Zushu Li,* Juncheng Li, Stephen Spooner, and Sridhar Seetharaman 1. Introduction The basic oxygen steelmaking (BOS) process produced over 70% of the global crude steel in 2018,[1] generating 100 to 150kg of slag ("BOS slag") for every tonne of crude steel produced. BOS slag,aproductofhotmetalelement(e.g.,Si,Mn ...
Given that ferrochrome is extremely magnetic and residual chromite in high-carbon ferrochrome slag is moderately magnetic, ferrochrome particles and residual chromite in the slag can be recovered …
In case of SS slag and low carbon (LC) FeCr slag a wet high intensity magnetic separation can up-concentrate Cr in the SS slag (fraction <150 µm) from 2.3 wt.% to almost 9 wt.% with a yield of 7 ...
Ferrochrome slag is a by-product of the production of ferro-chrome alloy, an essential component in stainless steel. The conventional process of ferrochrome making involves the carbothermic reduction of chromite ore where around 1.2–1.5 tons of slag …
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 ...
African National Roads Agency has utilized substantial tonnages of ferro chrome slag in ... R. N., 1997. The recovery of ferrochrome from slag at Zimasco. ... Metal recovery from steelmaking ...
The dump at the ferrochrome plant, Bamnipal, containing valuable ferrochrome justified the construction of a "metal from slag recovery plant", if a suitable process could be developed. This paper describes the outcome of the studies carried out at R&D, Tata Steel to develop a flow-sheet for this "metal from slag" recovery plant using ...
In terms of metal recovery, slag is a source of Cr, V, Mn or Mo, obtainable by applying appropriate extensive treatment to the slag to liberate part of these elements in oxide …
Ferrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr2O3 (3.88 wt.%) and MnO (18.69 wt.%), respectively. ... Recovery of chromium from these slags is not ...
Chromium (III) salts are the most widely used chemicals for tanning processes, but 60-70% of total chromium salts reacts with the hides. In the other word, about 30-40% of the chromium amount ...
ABSTRACT. This work aims at gathering fundamental knowledge for the development of a novel process for energy (H 2 gas) and materials (magnetite Fe 3 O 4) recovery in hot-steelmaking slags by reacting molten steelmaking slag with steam.Thermodynamic simulation was carried out to calculate the accumulated amount …
Since slag is rich in lime (CaO), silicic acid (SiO 2), phosphoric acid (P 2 O 5), magnesia (MgO), Mn, and Fe, these properties of the slag can be exploited to make use of fertilizer . Notably, steel-making slag and blast furnace slag have been extensively utilized as raw materials for fertilizer production, mostly in Japan, Korea, and China.
Slag is the by-product of iron- and steelmaking processes. Normally, around half to one tonne of slag would be generated for yielding one tonne of rolled iron or steel (Lobato et al. 2015).It was reported that the world steel production was 1.9 billion tonnes in 2016, which suggested that at least around 1 billion tonnes of slag is produced …
Basic oxygen steelmaking (BOS) slag, a product of hot metal element (e.g., Si, Mn, Fe, P) oxidation and flux (e.g. lime, dolomite) dissolution, plays a critical role in the production of high-quality crude steel, although its behavior inside the BOS vessel (formation and reaction with metal droplets and gas) is still not clear and its recycling has always been challenging.
