A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being "forced" or supplied above atmospheric pressure.
Probably the first use made of blast-furnace slag in the cement industry was not of an honourable nature, to use an almost worthless and cumbersome by-product as a not readily detectable adulterant in Portland cement, which was at that time very costly to manufacture.
· Ground-granulated blast-furnace slag is obtained by quenching molten iron slag from a blast furnace in water or steam, to produce a glassy, granular product that is …
These different types are referred to as furnace or tap slag, raker slag, synthetic or ladle slags, and pit or cleanout slag. Figure 18-1 presents a diagram of the general flow and production of different slags in a modern steel plant. The steel slag produced during the primary stage of steel production is referred to as furnace slag or tap slag.
Use of Blast Furnace Slag Aggregate in Concrete ... Iron cannot be prepared in the blast fur-nace without the production of its co-product i.e. blast furnace slag. ... The material was crushed and sieved and blast furnace slag passing through 20 mm sieve and retaining on 4.75mm.
Blast furnace slag products have been used successfully in virtually all phases of bridge construction. Projects such as the bridge pictured here can utilize blast furnace slag as a concrete aggregate. Blast furnace slag has been utilized in concrete masonry for many years.
Japan, Practice of Concrete with Blast Furnace Slag Fine Aggregate 1997 JIS A 5011-1 Slag Aggregate for Concrete, Part 1: Blast Furnace Slag Aggregate (JIS A 5012 was integrated with JIS A 5011.) 2002 Blast Furnace Slag Aggregate Is Designated under Law on …
Blast furnace slag is formed during the production of hot metal by thermo-chemical reduction in a blast furnace. During this continuous process, iron ore or pellets as well as fluxes (lime[stone] and/or dolomite) are heated under reducing conditions in the presence of heated air.
This gives a slag of different composition from either blast furnace or steelmaking slag, and which may be glassy or crystalline depending on the cooling routine. The result can be a strong and stable material, suitable as an aggregate for roads and similar applications.
Blast furnace slag is a nonmetallic coproduct produced in the process in the production of iron from iron ore or iron scrap. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. The molten slag, which absorbs much of the sulfur from the charge, comprises about 20 percent by mass of iron production.
· Carbon Steel Slag - an Excellent Raw Material for Road Construction Projects - English version - Duration: 6:33. ZAG - Zavod za gradbeništvo Slovenije 8,901 views 6:33
Slag Cement Benefits and Use in Concrete Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a …
as only iron (steel) was recycled from the slag and the rest of it was mainly disposed of to landfills. Today, due to the ever increasing share of steel production in electric arc furnaces in the world, the steel mill slag becomes more and more important and it replaces blast furnace slag …
12.5 Iron And Steel Production 12.5.1 Process Description1-3 ... The fused sinter is discharged at the end of the sinter strand, where it is crushed and screened. ... 0.2 to 0.4 tons of slag, and 2.5 to 3.5 tons of blast furnace gas containing up to 100 pounds (lb) of dust.
PRODUCTION The slag produced at blast furnace during pig iron manufacturing is called blast furnace slag. The slag produced at steel melting shop is known as steel ... The slag after cooling is crushed and used as road metal and railway ballast. Granulated slag produced in steel plants is also sold outside to cement plants. Slag
GGBS is one of the greenest construction materials. Manufacturing of Ground Granulated Blast Furnace Slag utilizes all of the slag material and produces no significant waste. The production of GGBS requires less than a fifth the energy and produces less than a fifteenth of the carbon dioxide emissions.
NON-PORTLAND CEMENT ACTIVATION OF BLAST FURNACE SLAG The purpose of this project was to produce a "greener" cement from granulated ground blast furnace slag (GGBS) using non-Portland cement activation. By eventually developing "greener" cement, the ultimate goal of this research project would be to reduce the amount of Portland cement
Blast Furnace Slag - Material Description ORIGIN In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product.
Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.
water, fine aggregate such as sand or finely crushed rock, and coarse aggregate such as gravel or crushed rock. Ground granulated blast furnace slag (slag cement), fly ash, silica fume, or limestone may be substituted for a portion of the portland cement in the concrete mix.
blast furnace slag. Grading Expanded blast furnace slag is crushed and screened to desired product sizing. Typically this is a blend of coarse and fine aggregate particles. The actual grading of products should be reviewed with the local supplier. The Process In the pelletizing process, a molten blast furnace slag stream is directed onto an ...
Blast furnace slag production in Japan Production of blast furnace slag 290 kg-slag/1000 kg iron ÆAnnual production of slag is 24 Mt. ... bed consist of crushed solid slag. Slag Boiler tube Crushing Slag (solid) Use as Gas material FB droplets No direct contact between liquid slag and boiler tube.
Blast furnace slag is allowed to slowly cool by ambient air, is processed through a screening and crushing plant and is processed into many sizes for use primarily as a construction aggregate. Common uses are as aggregates in ready-mix concrete, precast concrete, hot mix asphalt aggregate, septic drain fields and pipe backfill.
and blast furnace slag production. Air-Cooled Blast Furnace Slag. If the liquid slag is poured into beds and slowly cooled under ambient conditions, a crystalline structure is formed, and a hard, lump slag is produced, which can subsequently be crushed and screened. Expanded or Foamed Blast Furnace Slag