Many integrated steelmakers recycle their particulate by-products to the sinter plant. However, because of the low volume and poor handling characteristics of the materials, this often results in variations in the composition and homogeneity of the sinter bed with implications for sinter plant productivity.
Ferrous oxides from the caster or rolling mill represent high quality scrap for re-use in steel production. These can be recycled on their own or agglomerated with other by-products, depending on the specification required, to maximize recovery and minimize any impact on production.
Harsco uses blending and micro-pelletizing processes to convert individual by-products into a single homogenized mix, ensuring a consistent feed material.
The final product, carrying the metallics, can be tailored to the recycling application. For instance, in the form of pellets or briquettes.
Electric Arc Furnace dust is an important opportunity for resource recovery. Harsco’s patented CARBOFER™ process produces a slag foaming agent sourced from millscale, dusts and sludge recovered on site. These materials are blended with lime and carbon inside a purpose-built plant to produce a free-flowing powder injected directly into the furnace.
Ferrous oxides from the caster or rolling mill represent high quality scrap for re-use in steel production. These can be recycled on their own or agglomerated with other by-products, depending on the specification required, to maximize recovery and minimise any impact on production.
Harsco's PLASMINOX process uses a 7MW DC electric plasma furnace. The smelted end product is a Ni- and Cr-rich alloy which is returned into steelmaking. The solution has improved the sustainability of steelmaking operations, as well as successfully reducing the cost of raw materials and landfill.
The smelting process produces an ingot containing the recovered metallic units. The compact DC furnace plant is located onsite to facilitate quick recovery and transportation back to the customer for recycling into the furnace.
Global Plasma Partnership
Tetronics is Harsco`s Global Plasma Partner. Harsco is the service provider, Tetronics is the technology provider.Together, they provide a turnkey solution for recycling of hazardous industrial materials.