The physico chemical properties of four different types of iron and steel slags including blast furnace slag basic oxygen furnace slag electric arc furnace slag and ladle furnace slag are
The removal efficiency of lead iron and copper ions from aqueous solutions with the use of zeolite bentonite and steel slag as adsorbents was investigated Adsorption experiments were conducted at room temperature with aqueous solutions of individual metal ions of lead copper and iron and an equimolar aqueous mixture of all three metal ions
Arsenic III removal and recovery from hydrochloric acid leach liquor of tungsten slag were systematically investigated by solvent extraction with 2 ethylhexanol Because the iron in leach liquor could also be extracted by 2 ethylhexanol the effects of various conditions on arsenic III and iron extraction were investigated and the optimum conditions were determined
optimal slag for the magnesium lime co injection HMD process for sulphur removal as well as iron losses In part I of this study [1] the influence of slag composition on its sulphur removal capacity and on the iron loss was described In part II which is presented in this paper the theory from part I is evaluated with a Monte Carlo
Research has also focused on the recovery of iron from the slag by using coke as reductant of the copper oxide and the magnetite [19]; by modifying the molten slag with the purpose of promoting
to calcine Ti extraction blast furnace slag EBFS with the aim of removing iron from it The influences of calcination temperature ammonium chloride to EBFS mass ratio and particle size on the rates of iron removal were investigated The results show that the rate of iron removal increased to almost 100% with increases in calcination temperature
1 INTRODUCTION Blast furnace slag BFS and steel slag SS as industrial solid wastes produced in the process of steel making account for 80% 90% of the total smelting slag [] BFS accounts for about 30% of pig iron output [] while SS accounts for 10% 15% of the crude steel output [] SS comprises various slags including basic oxygen furnace slag BOFS
The change of iron composition as well as the removal of copper from iron was investigated in the reduction process and a new way to deal with copper slag was proposed The iron in copper slag exists mainly in the form of fayalite and the copper sulfide content accounts for just about 50% Therefore the magnetic separation as well as grinding floatation method is not
Converter slag is a by product of the steelmaking process and contains a large amount of Ca Fe P and other elements If the phosphorus in the converter slag can be effectively extracted the resulting phosphorus can be used as a phosphate fertilizer Phosphorus in converter slag is mainly enriched in 2CaO·SiO2 3CaO·P2O5 C2S C3P solid solution and is
When n C/n O= and reduction melting time is 60 min at 1320°C the recovery rate of iron is greater than % and the mass fraction of iron in iron nugget is about % Read more Article
The exception is granulated iron slag USSFegran for which the Cr concentration exceeded the residential use soil guidelines but not the industrial use guideline In addition to Cr the concentrations of Mn in all slag samples exceeded the residential use soil guideline wt % Mn ; several slags from legacy sites and the three steel slags
The iron and steel slag is characterized by highly alkaline nature and significant levels of metal ions especially Ca According to Geological Survey USGS 2018 every year almost 15 20 million ton of iron/ferrous slag and about 10 15 million ton of steel slag is produced These large quantities of slag are often stockpiled in huge
Ladle furnaces at Evraz Nizhnii Tagil Iron and Steel Works OJSC produce over 90 000 metric tons of slag per year As this slag cools it turns into a fine grained powder; if the powder cannot be sold it is temporarily stored until it can be disposed of [1] We have considered producing easily used flux sinter from the slag generated during ladle processing of steel
Introduction The iron and steel industry is a typical energy and resource intensive industry which is accompanied by a large amount of energy consumption and pollutant emissions primarily including steel slag granulated slag and iron containing dust and mud Dippenaar 2005; Guo and Bao 2018; Huang and Lin 2010; Kato et al 2020 At present the
The iron element in electric arc furnace EAF slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase a solid solution of FeO MgO CaO and MnO Landfilling EAF slag is strictly forbidden for environmental consideration because of poisonous Cr6 leaching The original RO phase could be transformed to a spinel
A novel aluminothermic smelting reduction ASR process was investigated for cleaning waste copper slag; this process is not only able to recover valuable iron but also eliminates hazardous elements from the end of life slag effect of adding Al on the reduction of iron oxide and subsequent iron recovery from waste copper slag at 1773 K was
High iron bauxite IRB red mud RM and fly ash FA are resources rich in iron and alumina yet there are no effective methods of recovering and utilizing them In this paper a new reduction smelting technology for the extraction of iron and alumina from IRB RM and FA is proposed based on the technology platform of Slag Metallurgy Mineral Recycling and Resource
In hot metal desulphurisation HMD the slag will hold the removed sulphur However the iron that is lost when the slag is skimmed off accounts for the highest costs of the HMD process
Therefore the pig iron and slag were separated from the copper smelting slag by the high temperature smelting reduction method The recovery behavior of Fe and Cu was examined by analyzing the chemical composition of the recovered pig iron and slag after cooling Table 1 Gibb s free energy changes of the carbon reduction reaction in the
Lan et al [54] hypothesized an approach for the separation of metallic copper values from the iron rich slag utilizing enhanced gravitational forces The effect of additives under the influence of enhanced gravitational field was investigated Industrial & engineering chemistry iron and copper recovery/removal from industrial wastes a
The hard to grind minerals in steel slag are native iron magnesium ferrite and calcium ferrite accounting for % which are harder than other minerals and the large amount of hard to grind minerals in the grinding process will lead to a decrease in the efficiency of grinding a roll crusher model FT3SGWOXTS was used to crush the SS
The material from jaw crusher will be conveyed to cone crusher for secondary crushing one magnetic separator is used in front of cone crusher for removing iron and another magnetic separator is used behind cone crusher for removing steel chips from slag
Niu et al [14] recovered more than 70% of Zn and Pb from lead slag in the form of dust whereas the nonvolatile fraction of Pb Zn and Cd solidified in the form of complex silicate phases in the nonvolatile fraction of As is an Fe As intermetallic compound encapsulated by chondritic particles or solidified in silicate phases Leaching tests [15] have
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