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Topic: Slag


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In the News (Tue 21 May 19)

  
  National Slag Association
Blast Furnace slag has been called the "All-Purpose Aggregate" as it can be used in all construction applications as either a normal weight or lightweight (expanded or pelletized) aggregate depending on how it was formed and processed.
Slags are produced in many metallurgical operations throughout the world and are considered a co-product of the production of iron and steel.
Slag is an environmentally sound material that has been used to aid in the remediation of many environmentally damaged areas such as Acid Mine Discharge.
www.nationalslagassoc.org   (244 words)

  
 Slag Cement Association - Slag Cement Creates Concrete At Its Best - Home
For the second year in a row, a strong increase in portland blast-furnace slag blended cements helped total slag cement shipments for 2006 achieve record highs.
Total slag cement shipments increased by 3.5% in 2006 to a total of 3.62 million metric tons.
The Slag Cement Association (SCA) represents companies that produce and ship over 95 percent of the slag cement (ground granulated blast furnace slag) in the U.S. The SCA is the leading source of knowledge on blast furnace slag cementitious products.
www.slagcement.org   (549 words)

  
  USGS Minerals Information: Iron and Steel Slag
Slags are nonmetallic byproducts of many metallurgical operations and consist primarily of calcium, magnesium, and aluminum silicates in various combinations.
Iron and steel slags are coproducts of iron and steel manufacturing.
Depending on the cooling method, three types of iron slag are produced— air cooled, expanded, and granulated— that have different types of applications.
minerals.usgs.gov /minerals/pubs/commodity/iron_&_steel_slag   (208 words)

  
  Ground Granulated Blast-Furnace slag   (Site not responding. Last check: )
The grade of a ground granulated blast furnace slag is based on its activity index, which is the ratio of the compressive strength of a mortar cube made with a 50 percent ground granulated blast furnace slag-cement blend to that of a mortar cube made with a reference cement.
Use of slag or slag cements usually improves workability and decreases the water demand due to the increase in paste volume caused by the lower relative density of slag (Hinczak 1990).
Effectiveness of slag in preventing damage due to ASR is attributed to the reduction of total alkalies in the cement-slag blend, the lower permeability of the system, and the tying up of the alkalies in the hydration process.
www.fhwa.dot.gov /infrastructure/materialsgrp/ggbfs.htm   (1772 words)

  
 Slag - Wikipedia, the free encyclopedia
Ground granulated slag is often used in concrete in combination with Portland cement as part of a blended cement.
Slag foaming is caused primarily by the generation of bubbles of carbon monoxide, carbon dioxide, water vapour, sulphur dioxide, oxygen, hydrogen gases within the slag, which foams much like soapy water.
Foaming slag is also used in the smelting of copper, nickel, chrome and (experimentally) iron.
en.wikipedia.org /wiki/Slag   (507 words)

  
 Slag Division
Slag for use in civil construction is derived from the manufacture of iron and steel.
Slag is produced as molten alumino-silicate, a combination of the reducing agents and fluxes used to remove oxygen from the iron oxide ores.
The slag in the stockpile is weakly cemented.
www.sysco.ns.ca /slag/slagdivision.htm   (304 words)

  
 Job knowledge for welders 43: Defects / imperfections in welds - slag inclusions (September 1999)
Slag is normally seen as elongated lines either continuous or discontinuous along the length of the weld.
Consequently, the risk of slag inclusions is significantly greater with basic fluxes due to the inherent convex weld bead profile and the difficulty in removing the slag from the weld toes especially in multi-pass welds.
Short slag related imperfections are permitted in all three quality levels with limits placed on their size relative to the butt weld thickness or nominal fillet weld throat thickness.
www.twi.co.uk /j32k/protected/band_3/jk43.html   (1218 words)

  
 National Slag Association - General information on slag production and slag products   (Site not responding. Last check: )
Slag is poured from the furnace in a molten state.
Granulated slag is rapidly cooled by large quantities of water to produce a sand-like granule that is primarily ground into a cement commonly know as GGBS (Ground Granulated Blast Slag).
Steel slag is processed as an air-cooled material, the free metallics are magnetically separated and the material is separated and sized into construction aggregates, used as an agricultural soil amendment, as a raw ingredient in Portland cement production, as an environmental remediation material and other uses.
www.nationalslagassoc.org /Slag_Information.html   (838 words)

  
 IDEM - Media   (Site not responding. Last check: )
Slag is formed as a molten liquid solution of silicates and oxides that solidifies upon cooling.
Slag that is not exempt from the hazardous waste rule must make a hazardous waste determination.
Slag is used in building and road construction, cement manufacture, concrete aggregates and glass manufacture.
www.state.in.us /idem/who/media/factsheets/slag.html   (308 words)

  
 Steel Slag - Material Description
The processing of steel slags for metals recovery is not only important to remove excess steel at the market source for reuse at the steel plant, but is also important to facilitate the use of the nonmetallic steel slag as construction aggregate.
Steel slag destined for use as an aggregate should be stockpiled outdoors for several months to expose the material to moisture from natural precipitation and/or application of water by spraying.
The slag processor may also be required to satisfy moisture content criteria (e.g., limit the amount of moisture in the steel slag aggregate prior to shipment to a hot mix asphalt plant) and to adopt material handling (processing and stockpiling) practices similar to those used in the conventional aggregates industry to avoid potential segregation.
www.tfhrc.gov /hnr20/recycle/waste/ssa1.htm   (1764 words)

  
 National Slag Association
Blast Furnace slag has been called the "All-Purpose Aggregate" as it can be used in all construction applications as either a normal weight or lightweight (expanded or pelletized) aggregate depending on how it was formed and processed.
Slags are produced in many metallurgical operations throughout the world and are considered a co-product of the production of iron and steel.
Slag is an environmentally sound material that has been used to aid in the remediation of many environmentally damaged areas such as Acid Mine Discharge.
www.nationalslag.org /index.htm   (212 words)

  
 Slag: The ultimate renewable resource - Pit & Quarry
Slag is poured from the furnace first as it floats on the surface while the heavier molten metal lies at the bottom of the vessel.
In the Americas, blast furnace slag was available at the many iron furnaces that dotted eastern Pennsylvania because the raw materials — iron ore, limestone and charcoal from wood — were plentiful and easy to extract.
Blast furnace slag began to accumulate into large stockpiles commonly known as "slag banks." In 1918, the National Slag Association was formed to unite slag producers to facilitate the promotion and recycling of this renewable resource.
www.pitandquarry.com /pitandquarry/article/articleDetail.jsp?id=254527   (768 words)

  
 Slag
Slag Blackhammer sat back in his favorite chair, and took a long draw of ale.
Slag ran with axe high directly at the creature bellowing a battle cry.
Slag stopped for a second and prayed "Clanggedin bless me, and I will strike this abommination from the face of this relm" he raised his head and saw his axe was a glow with hold mana.
www.delving.com /bio-slag.html   (1214 words)

  
 Abrasive Slag Managed With Basalt Lined Pipe - Supplier Data By Abresist
The molten iron has a greater density than that of the slag and is drawn off using a dam structure as it flows from the tap hole down a runner in the cast house floor.
Based on the condition of the molten slag, it is diverted to a pit for air-cooling or is granulated.
The granulated slag from the filterbeds is removed by a bridge crane and transported via conveyor to the storage silos.
www.azom.com /details.asp?ArticleID=3043   (1809 words)

  
 Slagging Furnace System/High-Temperature Air Furnace
As the hot combustion gas leaves the slag screen, it is quenched with recirculated flue gas to 1850°F in order to reduce the stickiness of the ash, which reduces deposition on the CAH surfaces.
Four slag injector feed ports and two view ports are located on the top of the furnace and hang into the furnace chamber.
At the end of the transfer tube is a custom-designed feeder splitter to perform a 1-to-2-to-4-way split of the slag granules into the four feed injector entry ports, which are connected to the water-cooled stainless steel feed injectors.
www.undeerc.org /rnd/equipment/slagging.asp   (889 words)

  
 Nontraditional Soil Amendments - slag
Slag is a by-product of the steel industry and consists primarily of calcium silicate minerals.
Slags have nearly the same ability to neutralize soil acidity as agricultural limestone, and they have been used extensively as soil liming materials.
Water-quenched slag is cooled rapidly with water, which causes the material to “pop” and generates porous, granular particles.
agguide.agronomy.psu.edu /cm/sec9/sec96.cfm   (332 words)

  
 Slag Language Specification v1.0.2   (Site not responding. Last check: )
Slag is an elegant, object-oriented language designed to enable rapid software development while reducing drudgery and sources of potential error.
Slag's mechanism for multi-file projects is somewhat of a hybrid between C++ and Java approaches, with the timestamp intelligence of "make" thrown in.
Slag primitives can be extended into new classes or extended in-place, but in either case they cannot have any data members added to them and any new classes are non-polymorphic.
www.cet.nau.edu /~apr/slag/spec   (7635 words)

  
 The Birth of the Slag Cement Association
Because of the rapid growth of the U.S. slag cement industry, the Slag Cement Association (SGA) was formed in 2001 to help educate engineers, specifiers, contractors, and producers in the proper use of slag cement.
Slag cement is a value-added material resulting from the reduction of iron ore into iron, and subsequent post-processing of the non-metallic mineral products (i.e., slag).
Slag cement is produced in a tightly controlled process that ensures consistent chemical and physical properties.
cementamericas.com /mag/cement_birth_slag_cement/index.html   (2147 words)

  
 Slag   (Site not responding. Last check: )
Primarily a compound of calcium and silica, slag also contains small quantities of uranium and radium these two elements are naturally present in the phosphate ore. Their presence in the slag causes it to emit very low levels of gamma radiation - a type of radiation similar to medical x-rays.
They include: attrition, or removing the slag once the structure's useful life has ended; alterations in how the occupants use the area; and building additional living space to replace areas that contribute to elevated radiation doses.
The primary focus of the phosphorus slag program is on gamma radiation from phosphorus slag that has been used as a building material in many area buildings.
www2.state.id.us /phd6/Services_Provided/hp/Slag/slag.htm   (1009 words)

  
 Coal Bottom Ash/Boiler Slag - Material Description
Wet-bottom boiler slag is a term that describes the molten condition of the ash as it is drawn from the bottom of the slag-tap or cyclone furnaces.
Boiler slag is essentially a coarse to medium sand with 90 to 100 percent passing a 4.75 mm (No. 4) sieve, 40 to 60 percent passing a 2.0 mm (No. 10) sieve, 10 percent or less passing a 0.42 mm (No. 40) sieve, and 5 percent or less passing a 0.075 mm (No. 200) sieve.
When using bottom ash or boiler slag in an embankment, backfill, subbase, or even possibly in a base course, the potential for corrosion of metal structures that may come in contact with the material is of concern and should be investigated prior to use.
www.tfhrc.gov /hnr20/recycle/waste/cbabs1.htm   (2612 words)

  
 What is a slag?   (Site not responding. Last check: )
The natural slag can be related to the metallurgical counterpart in that the silicates may be the predominant network component that form a glassy phase and usually contains a mixture of minerals.
Metallurgical slags are also important as a vital part of the metallurgical process that made the industrial revolution feasible of the and the subsequent technical advances of the human civilization.
Further, the slag functions mainly as a barrier to prevent the oxidation of liquid metal by the atmospheric oxygen and it serve as an ionic "buffer" to control the liquid metal composition.
web.umr.edu /~hruiz/slags/Origins.html   (404 words)

  
 Footings mark major use of slag cement
In May, Aucem GGBF slag cement -in a 70 percent substitution for Type II portland cement - was being used to lower the heat of hydration in a 2,600-yd.
GGBF slag cement is not a new product, having been used for years in private sector construction, such as the high-profile Rock & Roll Hall of Fame in Cleveland, but still is undergoing the acceptance process among state departments of transportation (see "Waste" works wonders, Concrete Products, June 1996, page 50).
GGBF slag cement has attributes such as a low heat of hydration, increased compressive and flexural strengths, inhibition of alkali-silica reactivity (ASR), resistance to sulfate attack, and reduced permeability to protect rebar from chloride penetration.
concreteproducts.com /mag/concrete_footings_mark_major/index.html   (2301 words)

  
 Slag for Champions
Slag became a member of the Dynobots, a special Autobot unit directly under Grimlock's command.
Slag was among the united Autobot and Decepticon forces who opposed Unicron's assault on the planet Cybertron in 1991 (Transformers #75).
Slag was reissued as a Generation Two Transformer, but they changed him to being green in color.
mywebpages.comcast.net /mathewignash/csslag.html   (839 words)

  
 Macro Slag   (Site not responding. Last check: )
Larger liquid inclusions (10 to 300 microns) occur due to emulsification of the covering slags or scums that are present on top of liquid steels and are generally due to practice related issues.
Slag design is not an issue inthe removal of these macro-inclusions as dissolution of liquid inclusions into a liquid slag is not problematic.
Therefore the onset of entrainment tends to be related to the sub-meniscus fluid velocity, the shear length (often related to slag depth) and the slag physical properties.
neon.mems.cmu.edu /afs/afs2/slag.html   (335 words)

  
 Antiquair De Slag Olterterp
Het bedrijf is gevestigd in een wit geschilderde stolpboerderij te Olterterp, een dorpje onder de rook van Drachten.
"De Slag" is een vertrouwd adres dat levert met garantie en de moeite waard is om te bezoeken
Wij verkopen enkel onder garantie Met gratis taxatierapport "DE SLAG v.o.f." is één van de oudste bedrijven in Noord-Nederland         Ons bedrijf bestaat al meer dan 30 jaar        De tweede generatie heeft nu de leiding
www.deslag.nl   (710 words)

  
 slag definition - Dictionary - MSN Encarta
Search for "slag" in all of MSN Encarta
transitive and intransitive verb (past and past participle slagged, present participle slag·ging, 3rd person present singular slags)
turn something into slag: to convert something into slag, or become slag
encarta.msn.com /encnet/features/dictionary/DictionaryResults.aspx?refid=1861734654   (85 words)

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