Rotary hearth furnace smelting reduction technology is to make the pelletizing ball which after ingredients, mixing, pelletizing and dried process be added to an annular rotatable hearth furnace and a rotary hearth furnace, rotating under the temperature of about 1350 ℃, the iron ore is carbon reduction. When iron ore fines of more than 69% of grade, using a rotary hearth furnace direct reduction processes, the metal pellets can be used as a blast furnace feedstock. Generally the typically metallization rate is up to 80%.
 
Rotary hearth furnace smelting reduction method and the rotary hearth furnace smelting reduction iron making process is to make the raw reduction pellets into metal pellets through rapidly heating the rotary hearth furnace, and recycling mill dust, sludge treatment of steel at the same time recovery of zinc oxide, nickel and other valuable elements.
 
Our rotary hearth furnace treatment of metallurgical dust, sludge and recycling of zinc and iron is adopting the key technical resources, compared with other technology advantage and cost-effective advantages. It has solved the difficulty in metallurgical dust solve solid waste sludge treatment in a continuous recovery of zinc, iron and recycling waste heat recovery steam major issue to meet the development of circular economy and build a resource-saving society practical requirement. It marks China's own research and design rotary hearth furnace proprietary metallurgical dust sludge treatment process and has been a tremendous success for the global steel industry at the aspect of solid waste treatment.