Steel Slag Asphalt: Preventing the Waste of a High Quality Resource
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Steel slag is the inevitable by-product of the production of steel, from both the conversion of iron to steel and the recycling of steel scrap. Historically, this material has been sent to a landfi ll as waste, but over the last 100 years or so, a variety of uses have been found for what has proven to be a high quality, valuable resource. With this in mind, the steel industry within Europe now consider iron and steel slag to be products and not waste and as such have registered the materials under Reach (Registration, Evaluation Authorization and Restriction of Chemicals). Steel slag is formed by the addition of lime to the molten metal in order to remove impurities and to control the quality of the steel. The resultant slag is a complex mineral formed from oxides of calcium, aluminium, silicon and magnesium along with various other trace elements. Once cooled, the slag forms a crystalline rock that can be used as a replacement for natural aggregate in a variety of construction products, including asphalt. This paper specifi cally focuses on the use of steel slag as aggregate for asphalt mixtures in road construction and addresses the processing and quality control of the slag, along with its properties and the benefit of these properties for Asphalt materials.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Steel slag is the inevitable by-product of the production of steel, from both the conversion of iron to steel and the recycling of steel scrap. Historically, this material has been sent to a landfi ll as waste, but over the last 100 years or so, a variety of uses have been found for what has proven to be a high quality, valuable resource. With this in mind, the steel industry within Europe now consider iron and steel slag to be products and not waste and as such have registered the materials under Reach (Registration, Evaluation Authorization and Restriction of Chemicals). Steel slag is formed by the addition of lime to the molten metal in order to remove impurities and to control the quality of the steel. The resultant slag is a complex mineral formed from oxides of calcium, aluminium, silicon and magnesium along with various other trace elements. Once cooled, the slag forms a crystalline rock that can be used as a replacement for natural aggregate in a variety of construction products, including asphalt. This paper specifi cally focuses on the use of steel slag as aggregate for asphalt mixtures in road construction and addresses the processing and quality control of the slag, along with its properties and the benefit of these properties for Asphalt materials.
Metal Recycling at Waste Incineration Plants and Mechanical Waste Treatment Plants
© Thomé-Kozmiensky Verlag GmbH (10/2012)
Whether the treatment and sorting facility for metal recycling is right next to a waste incineration plant, or whether this is done at the treatment facility of a dedicated company, is a business decision that has to be taken by each incineration plant individually. Systemically this is of lower priority, although the additional costs for transport will have to be taken into consideration in the climate Balance.
© Thomé-Kozmiensky Verlag GmbH (10/2012)
Whether the treatment and sorting facility for metal recycling is right next to a waste incineration plant, or whether this is done at the treatment facility of a dedicated company, is a business decision that has to be taken by each incineration plant individually. Systemically this is of lower priority, although the additional costs for transport will have to be taken into consideration in the climate Balance.
Reliable identification of conductive metals: Sorting metals with no optical aids
© Deutscher Fachverlag (DFV) (6/2010)
The EX900 sorting unit, manufactured by Exsor GmbH, is a completely new development in the field of fully automatic, sensor-aided metal sorting. It can accurately recognise and sort out electrically-conducting materials, has a throughput of up to 60 tons per hour for slag and has an intelligent automation concept with freely selectable sorting and metal programs. Thanks to the PROFIBUS automation concept it is possible to control, monitor and visualise all assembly groups and subsystems universally and modularly, while the system can be extended almost infinitely.
© Deutscher Fachverlag (DFV) (6/2010)
The EX900 sorting unit, manufactured by Exsor GmbH, is a completely new development in the field of fully automatic, sensor-aided metal sorting. It can accurately recognise and sort out electrically-conducting materials, has a throughput of up to 60 tons per hour for slag and has an intelligent automation concept with freely selectable sorting and metal programs. Thanks to the PROFIBUS automation concept it is possible to control, monitor and visualise all assembly groups and subsystems universally and modularly, while the system can be extended almost infinitely.
Valorization of recycled material into Ni-based composites
© Aristotle University of Thessaloniki (6/2009)
The recycling of waste towards valuable materials and their utilization into metal-based composites represents an important field of study. The composite industry nowadays prioritizes environmental improvements as much as other composite properties. In the present research, Ni powder was produced from the recycling of metallic waste, a low cost and largely available material, by an attractive hydrometallurgical recovery process.
© Aristotle University of Thessaloniki (6/2009)
The recycling of waste towards valuable materials and their utilization into metal-based composites represents an important field of study. The composite industry nowadays prioritizes environmental improvements as much as other composite properties. In the present research, Ni powder was produced from the recycling of metallic waste, a low cost and largely available material, by an attractive hydrometallurgical recovery process.
Metal Sorting in Waste Treatment–Improvement of Quality and Economical Backbone
© Wasteconsult International (5/2007)
Metals are more than ever important for the economical success of a waste management plant, like for RDF, MBT, packaging waste. To make an investment decision more and more life cycle costs has to be taken in account. The major parameters for this are recovery rate, product purity, availability of the machine or even the maintaining effort.
© Wasteconsult International (5/2007)
Metals are more than ever important for the economical success of a waste management plant, like for RDF, MBT, packaging waste. To make an investment decision more and more life cycle costs has to be taken in account. The major parameters for this are recovery rate, product purity, availability of the machine or even the maintaining effort.
Paper and cardboard sorting and Baling Plant in Lleida
© Infoenviro (2/2007)
A new paper and cardboard sorting and baling plant was recently started up by Felip Vilella I Fills, S.L., a company that collects, processes and recycles different types of waste. The new plant is an extension of the previously existing facilities that the company employ to handle other types of waste including end-of-life vehicles, scrap metal, batteries, glass and plastics, among others.
© Infoenviro (2/2007)
A new paper and cardboard sorting and baling plant was recently started up by Felip Vilella I Fills, S.L., a company that collects, processes and recycles different types of waste. The new plant is an extension of the previously existing facilities that the company employ to handle other types of waste including end-of-life vehicles, scrap metal, batteries, glass and plastics, among others.
Contaminated Soil as an Alternative Raw Material in Chilean Cement Production Facilities
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (9/2004)
The mass balances in a selected Chilean cement production facility indicate that the use of contaminated volcanic soil as an alternative raw material can be an interesting alternative for the management of these materials.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (9/2004)
The mass balances in a selected Chilean cement production facility indicate that the use of contaminated volcanic soil as an alternative raw material can be an interesting alternative for the management of these materials.
