requirements for an efficient iron-making operation; he can only modify the slag properties to a limited extent by changing cooling conditions. It is fortunate, therefore, that the range of slag compositions associated with good iron production is all useful construction materials, although varying
Apr 04, 2012· The slag phase forms from the fusion of the nonferrous components of the iron ore, the charcoal ash, unreduced iron oxides, and any flux added to the briquette mix. The strength of the fired briquettes is largely due to the formation of a continuous and coherent slag phase.
These included the addition of materials containing silicate or aluminate into steel slag during discharge (JP 74-58107); putting fine steel slag into molten blast furnace slag (JP 76-61278); adding boric acid or borate into steel slag (JP 78-43690); and mixing molten BOS slag with special steel slag containing Cr 2 O 3 to raise the content of Cr 2 O 3 above 2% (JP 78-30997). The aim of all of these methods
Apr 12, 2013· The cooling rate of steel making slag is sufficiently low so that crystalline compounds are generally formed. The relative proportions of these compounds depend on the steelmaking practice and the steel slag cooling rate. The steelmaking slag mainly consists of SiO2, CaO, Fe2O3, FeO, Al2O3, MgO, MnO, and P2O5.
Jul 18, 2013· Traditionally, iron ore has been reduced with coke in a blast furnace and the hot metal product of the blast furnace containing carbon, manganese, silicon, sulphur and phosphorous, was subsequently refined in a steelmaking furnace. During ironmaking as well as during steelmaking, significant amounts of slag are produced.
The refining slag is a new type steel casting auxiliary materials to meet the requirements for producing low sulphur steel. Its raw materials are fused by the EAF, making this products with 90% 7Al 2 O 3 ·12CaO calcium aluminate contents. Its activity coefficient is more than 70%.
Steelmaking slag (SMS), a by-product of iron-making precursors into products that meet technical requirements for use as aggregates or shaped blocks. steel-making slag blocks have good
Aug 01, 2015· The hot metal and scrap together influences the SiO2 content of the slag. Every kilogram of silicon reacting with oxygen creates 2.17 kilogram of SiO2. This SiO2 need to be neutralized with lime and calcined dolomite for forming a basic slag. This basic slag causes a loss of 5 kilogram of iron into the slag as FeO.
PHYSICAL QUALITY REQUIREMENTS Physical quality requirements are all specification provisions other than gradation or usage requireme nts. These requirements may be divided into five distinct groups as follow: 1) Absorption 2) Abrasion resistance 3) Soundness 4) Restriction on deleterious constituents 5) Special requirements FINE AGGREGATES
Jan 10, 2014· LD slag has a series of advantages over natural rock in the field of road construction. Greater hardness. Slag has a greater PSV (Polished Stone Value): i.e., greater resistance to wear. This is the result of its mineral composition. The consequences: less wear and longer road lifetimes. Roads constructed using LD slag demonstrate reduced rutting.
2 emissions because it is calcined in the steel making process. It also saves valuable raw materials for another day and the CO 2 pt that would be emitted from the clinkering process. Another benefit to the cement manufacturer from using steel slag is iron oxide in steel slag
requirements for an efficient iron-making operation; he can only modify the slag properties to a limited extent by changing cooling conditions. It is fortunate, therefore, that the range of slag compositions associated with good iron production is all useful construction materials, although varying in
Oct 27, 2011· To maintain slag quality, good housekeeping is essential at all stages. General rubbish must be kept from entering the slag pits, and the bunds or walls enclosing the pits, which may be simply a ridge of aggregate, should be made of the same material in case some is recovered with the cooling slag during excavation.
Steelmaking slag (SMS), a by-product of iron-making precursors into products that meet technical requirements for use as aggregates or shaped blocks. steel-making slag blocks have good
The refining slag is a new type steel casting auxiliary materials to meet the requirements for producing low sulphur steel. Its raw materials are fused by the EAF, making this products with 90% 7Al 2 O 3 ·12CaO calcium aluminate contents. Its activity coefficient is more than 70%.
Oct 10, 2016· The reduced iron melts and runs down to the bottom in the hearth. The flux combines with the impurities in the ore to produce a slag, which also melts and accumulates on top of the liquid iron in the hearth. From time to time, the liquid iron and liquid slag are drained out of
We looked specifically at ferrous slag, the leftover material from the smelting of iron and steel, in the Chicago-Gary area of Illinois and Indiana. Ferrous slag is currently underutilized. Although the construction industry does use some slag as an aggregate, most is simply discarded.
Coke and Iron Coke and iron are of concern only with the slag materials. Coke is an ingredient in the iron making process. Slag from these furnaces normally are free of objectionable amounts of coke and iron. Chert Chert is a rock of almost any color and is composed of glassy silicon and
Jan 10, 2014· LD slag has a series of advantages over natural rock in the field of road construction. Greater hardness. Slag has a greater PSV (Polished Stone Value): i.e., greater resistance to wear. This is the result of its mineral composition. The consequences: less wear and longer road lifetimes. Roads constructed using LD slag demonstrate reduced rutting.
The type produced in making steel does not contain high levels of toxic elements, but slag produced by smelters that refine copper, lead, cadmium and other base metals contains higher levels of
Iron Slag Crushing Plants, Pig Iron Investment case: Ferro Chrome Manning requirements Maintenance requirements Environmental considerations. requirements for a good slag . What are the requirements of a good slag Slag is the detritus or remains of some industrial processes for which no use has been found. Get Price. slag crushing equipment
2. Waste you can use and codes. You must only use the slag waste from steel-making method: basic oxygen steelmaking (BOS) electric arc furnace (EAF) including carbon steel EAF and high alloy EAF
Nov 09, 2020· Steel slag is a large amount of residual material produced in the process of steel manufacturing. With the requirements of sustainable development in China, the utilization of steel slag has become a hot issue. Through an in-depth study on steel slag, it is apparent that it has been widely used in various fields in recent years. The resource utilization of steel slag is not only conducive to
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