Circular tunnel-type rotary hearth furnace and ironmaking method

• Main Author: WANG YUNLONG
• Format: Patent
• Language: Chinese; English
• Published: 25.09.2013
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a circular tunnel-type rotary hearth furnace and an ironmaking method, belongs to the field of metallurgy, and in particular relates to a rotary hearth furnace and the ironmaking method in non-blast furnace ironmaking. The invention adopts the technical schemes and solves the problems as follows: 1, high-efficiency production of continuous furnace material input and continuous product discharging is realized by virtue of the technical schemes of a circular tunnel-type furnace body, a bullet-train-type water-cooling rotary furnace hearth, a multilayer material tray car and the like, and the productivity of a single furnace can reach hundreds of thousands of tons/year to millions of tons/year; 2, the purposes of reducing the production cost and saving energy and reducing emission are achieved by virtue of the technical schemes of powdered coal burning, coal gas cooling for reduced pellets, heat recovery, air preheating and direct charging of wet pellets; and 3, by adopting same inner-fur