System and method for recycling copper slag waste heat and directly reducing and extracting iron

• Main Authors: YAN ZIWEN, WANG TA, QIN QIN, YU QINGBEI, ZUO ZONGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention belongs to the technical field of non-ferrous metallurgy and particularly relates to a system and method for recycling copper slag waste heat and directly reducing and extracting iron. According to the system and method for recycling the copper slag waste heat and directly reducing and extracting the iron, granulated copper slag particles are directly prepared into copper slag carbon-containing particles, the ore grinding procedure is omitted, and the energy consumption in the pelleting process of pellets in the prior art is reduced; in a drying furnace, the compressive strength of dried copper slag carbon-containing pellets is improved, and a guarantee is provided for direct reducing; according to the system and method for recycling the copper slag waste heat and directly reducing and extracting the iron, by controlling the temperature of a reducing furnace, the reducing rate of the iron in copper slag is increased; and by recycling flue gas waste heat in the furnace, the waste heat recycling r