ISSN 2594-357X
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Abstract
Waste becomes a resource, where recycling is a profitable activity within a plant. Due to increasing raw material and land filling costs and also the decreasing availability of dumping area, recycling of waste material from an integrated steel plant is getting more and more important. An integrated steel plant produces about 36 to 96 kg waste material per produced ton steel with an iron content of approx. 50%. Furthermore, DRI plants are also facing problem with oxide fines generation during material handling. These Oxide Fines are until now not used inside the DRI Plant. SVAI has developed several recycling technologies for treating waste materials and oxide fines, which are discussed in this paper. Agglomeration of recyclable material is necessary before reused in the reduction shaft (DR), blast oxygen furnace (BOF) or electrical arc furnace (EAF). Briquetting of various dusts and sludges allows integrated recycling within existing primary production units. Depending on the application area of the briquettes different curing time is necessary. Therefore various degrees of hardness can be achieved. Concerning the binding agent the process is very flexible. You have the possibility to use binding agents based on sugar, cellulose or minerals. Dependent on the recycling material different combinations of binding agents can be used as well. In particular plant concepts for briquetting of iron oxides as well as waste materials generated within integrated Steel Plants and the different ways of recycling are described in detail.
Waste becomes a resource, where recycling is a profitable activity within a plant. Due to increasing raw material and land filling costs and also the decreasing availability of dumping area, recycling of waste material from an integrated steel plant is getting more and more important. An integrated steel plant produces about 36 to 96 kg waste material per produced ton steel with an iron content of approx. 50%. Furthermore, DRI plants are also facing problem with oxide fines generation during material handling. These Oxide Fines are until now not used inside the DRI Plant. SVAI has developed several recycling technologies for treating waste materials and oxide fines, which are discussed in this paper. Agglomeration of recyclable material is necessary before reused in the reduction shaft (DR), blast oxygen furnace (BOF) or electrical arc furnace (EAF). Briquetting of various dusts and sludges allows integrated recycling within existing primary production units. Depending on the application area of the briquettes different curing time is necessary. Therefore various degrees of hardness can be achieved. Concerning the binding agent the process is very flexible. You have the possibility to use binding agents based on sugar, cellulose or minerals. Dependent on the recycling material different combinations of binding agents can be used as well. In particular plant concepts for briquetting of iron oxides as well as waste materials generated within integrated Steel Plants and the different ways of recycling are described in detail.
Keywords
Briquetting Plant, Recycling, Oxide Fines, Waste Materials, Innovative Solution
Briquetting Plant, Recycling, Oxide Fines, Waste Materials, Innovative Solution
How to refer
Moser, Mario;
Fleischanderl, Alexander;
Neuhold, Robert.
INNOVATIVE SOLUTIONS ON RECYCLING OF OXIDE FINES AND WASTE MATERIALS TO OPTIMIZE PRODUCTION COSTS
,
p. 356-363.
In: 43º Seminário de Redução de Minério de Ferro e Matérias-Primas e o 14º Simpósio Brasileiro de Minério de Ferro,
São Paulo,
2013.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-23827
