Is slag contaminated?
Because of its characteristics, ferrous slag is commonly used for construction and environmental applications, whereas both non-ferrous and ferrous slag may be reprocessed for secondary metal recovery. Both types of slag have been a source of some environmental contamination.
How is slag disposed of?
While most of the furnace slag is recycled for use as an aggregate, excess steel slag from other operations (raker, ladle, clean out, or pit slag) is usually sent to landfills for disposal. Steel slag can normally be obtained from slag processors who collect the slag from steel-making facilities.
Why is slag toxic?
When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, chromium and strontium. These compounds could be harmful not only for environment but also for human health [9,10].
Is slag toxic to humans?
Irritating or corrosive to mouth, throat and gastro-intestinal tract. Serious eye damage/irritation: Based on information for Blast Furnace Slag: Causes serious eye damage and possible blindness. … STOT (Specific Target Organ Toxicity) Single Exposure: Breathing dusts causes respiratory irritation.
Is slag hazardous material?
US Department of Transportation (DOT) under 49 CFR 172.101 does not regulate Basic Blast Furnace Slag as a hazardous material. All Local, State, Federal and international regulations that apply to the transport of this type of material must be adhered to.
Is coal slag environmentally friendly?
The physical properties of coal slag make it a suitable abrasive substitute for silica sand. … Coal slag is a recycled byproduct from coal combustion and is often viewed and marketed as ‘green’, non-hazardous and environmentally friendly by manufacturers.
Can you reuse coal slag?
Coal slag has been used frequently as a blasting material. Media of these types may not be reused in the abrasive process, but can be recycled into other materials (e.g. cement or concrete). Types of abrasive blasting media which are used more than one time include garnet, steel shot, and glass bead.
How much does slag cost?
In unground form, granulated slag sells for about $35 per ton and sells for about twice that amount as GGBFS (table 2). This is in contrast to a range of about $3 to $14 per ton for air-cooled slag; the prices are necessarily low to allow the material to compete with natural aggregates.
What is the main use of slag?
While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of the smelting, and minimizing any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal.
Is slag gravel toxic?
Doug Hoag and Daryl Sywassink made a presentation before the Muscatine County Board of Supervisors on residents’ concerns regarding the use of steel slag on gravel roads. … After testing the material, Askew concluded that the slag “is harmful to children” and “can be harmful to adults.”
Is iron slag hazardous?
Slag was tested by EPA standards and found to be non-hazardous.
Is slag heavy or light?
The slag is heavier and higher melting than the metal.