To improve the efficiency of iron recovery from steel slag and reduce the wear-and-tear on facilities, a new method was proposed by adding a secondary screen sizer to the magnetic separation process according to grain size distribution of magnetic iron (M-Fe) in the slag. The final recycling efficiency was evaluated by calculating the …
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For example, Teratoko et al. [ 9] reported the dissolution behavior of a solid solution with high P content in an acidic solution and proposed the selective leaching process to separate P from steelmaking slag. As a fundamental study of this process, Numata et al. [ 10] and Du et al. [ 11] showed the difference in the dissolution behaviors …
By measuring the utmost magnetic iron that can be separated by the magnetic separation process, the final M-Fe recovery efficiency can be estimated ; moreover, mapping ou t the size distribution of magnetic iron in steel slag could help to improve the magnetic separa tion process and thus significantly enha nce the M-Fe recycling.
The grown demand of current and future development of new technologies for high added value and strategic metals, such as molybdenum, vanadium, and chromium, and facing to the depletion of basic primary resources of these metals, the metal extraction and recovery from industrial by-products and wastes is a promising choice. Slag from the …
The extraction and carbonation experiments were performed on two types of slag samples, specifically non-magnetic steelmaking and pig iron slag, utilizing the chosen factors for each procedure. NH 4 Cl was chosen as the extractant because of its high calcium selectivity and inhibition of gel formation.
A schematic flowchart of general steelmaking slag treatment procedures is illustrated in Fig. 1. As metallic iron and iron minerals are normally heavily contained in the …
The slags with particle size of -10 mm were enriched by the magnetic separator resulting and increase in Fe grade from 18% to 33%. The use of BOF slag in sinter blend provided additional Mn, CaO, MgO and introduced a good solution to environmental problems.
Representative samples taken from steelmaking slag were sent to a different iron and steel plant to determine if the BOF slag separated as magnetic and non-magnetic products could be used effectively to obtain an iron-containing flux material for sinter by experimenting different blade gaps and various the magnetic field intensities (600- 1200 …
Abstract. Large volumes of slags are formed as by-products during the refinement of pig iron by basic oxygen steelmaking or electric arc furnace steelmaking. In order to lower the environmental impact of the steel industry and ensure its economic sustainability, there have been significant studies finding the ways to recycle by-products.
Steelmaking slag, or steel slag, is a by-product from the production of steel during the conversion of hot metal to crude steel in a basic oxygen furnace, or during the melting of scrap in an EAF. The slag is generated as a melt and is a complex solution of silicates and oxides that solidify upon cooling.11 Depending on the specific steel production process, …
The slags with particle size of -10 mm were enriched by the magnetic separator resulting and increase in Fe grade from 18% to 33%. The use of BOF slag in sinter blend provided additional Mn, CaO, MgO and introduced a good solution to environmental problems.
The magnetic separation method is used for separating metallic iron and iron minerals. from steel slag. Commonly used magnetic machines are the cross-belt magnetic …
In this research, the authors aimed at enhancing iron recovery from the steelmaking slag fines by process optimization of upgrading the slag fines with dry magnetic separation.
A slag concentrate of 30% by weight with 35% Fe grade can be beneficiated from BOF slags by using a magnetic separator with 1000G magnetic field intensity. 2.3 Chemical and Mineralogical Characterization Phase determination of -10 mm steelmaking slag and sinter samples containing slag were subjected to X-ray diffraction studies and ...
Yokoyama et al. 5) proposed a magnetic-separation method to separate and recycle the P-rich phase from steelmaking slag, by exploiting the differences in their magnetic properties. ...
Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to …
In case of high silicon entering the basic steelmaking furnace, either double slag practice or slag flushing has to be adopted. Alternatively, external desiliconization of the hot metal has to be done outside the blast furnace before charging it in a basic steelmaking furnace.
Study on steel furnace slags with high MgO as additive in Portland cement. Cement and Concrete Research 32, 1247–1249. Edward, H.R., 1979. The basics of magnetic …
Magnetic separators process steelmaking slag in multiple layers for mass production and non-magnetic particles are attracted to a magnet roll by magnetic particles [1].
Samples of steelmaking slag fines from three ArcelorMittal Americas steelmaking plants were collected, characterized and tested with weak magnetic separation coupled with selective particle size screening. Test results show that existing slag processors' magnetic separators are ineffective in separating iron from …
The magnetic separation method is used for separating metallic iron and iron minerals from steel slag. Commonly used magnetic machines are the cross-belt magnetic separator, drum magnetic separator and magnetic pulley separator. No one system or type of magnet can be used for all ferrous waste recovery.
Magnetic separation of ferrous metallics from municipal solid waste is based on technology developed for, and profitably applied to, ore beneficiation, slag reclamation, automobile shredding, and scrap processing industries.
Along with iron and steel production, large amount of slag is generated. Proper management on the iron- and steelmaking slag is highly demanded due to the high cost of direct disposal of the slag to landfill, which is the most adopted management approach. In this article, the potential application of iron- and steelmaking slag has …
They revealed that existing slag processors failed to separate iron from steelmaking slag fines in economic ways and nonrecyclable ''metallic'' fine products with low level of iron and high level ...
In this study, a basic oxygen furnace (BOF) steelwork slag obtained from the Kardemir integrated iron and steel works, Karabuk, Turkey is used. A drum magnetic separator system with pre-engineered crucial processing parameters of drum revolution speed, drum radius, drum flesh thickness, and magnitude of the magnetic field applied is utilized ...
THE integrated steelmaking process generates blast furnace slag and steelmaking slag as byproducts, where most of the blast furnace slag is valuably reused as a material for cement production, whereas the steelmak-ing slag is used as a material for road base and civil engineering work.[1,2]However, in the future, domestic construction work is expected …
The P-bearing steelmaking slag generated from steel plant is considered a potential phosphorus source. In this study, a novel process of selective leaching–precipitation–alkaline wash was proposed to recover high-quality phosphate from steelmaking slag. During leaching, most of the P was dissolved from slag and Fe was …
This chapter deals with electric furnace steelmaking, a tool for the massive production of steels, which is responsible for 30% of the current worldwide production. The EAF is a field for dynamic development of technology, adapting to changing and challenging scenarios. This chapter includes raw materials, furnace construction, melting practice ...
The current studies about phosphorus recovery from steelmaking slags generally include two aspects: (1) enrichment of phosphorus by separating the phosphorus-containing phase in steelmaking slag for further recovery, and (2) phosphorus extraction from the initial steelmaking slag or the enriched slag.
Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking …
To improve the efficiency of iron recovery from steel slag and reduce the wear-and-tear on facilities, a new method was proposed by adding a secondary screen sizer to the …
