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Technique for comprehensively utilizing iron-containing dust mud
The invention discloses a technique for comprehensively utilizing iron-containing dust mud, which is characterized by comprising the following steps: preparing iron-containing dust mud into blocks or balls by block pressing, ball pressing or balling, drying the ball or blocky red mud, adding the red mud into a rotary hearth furnace, carrying out ZnO removal, alkali metal removal and FeOx pre-reduction on the dust mud in the rotary hearth furnace technique, recovering ZnO from rotary hearth furnace flue gas, and pre-reducing to obtain the metalized pellet DRI; and adding the DRI generated from the rotary hearth furnace into a melting furnace to perform slag-iron separation, sending the separated molten iron into a steelmaking technique, and carrying out concurrent heating hardening and tempering on the dust mud molten slag separated from the metal, wherein the product can be used for producing cement, mineral wool, microcrystalline glass or other high-added-value silicate products. Thus, the technique enhances the comprehensive utilization efficiency of the whole iron-containing dust mud, and enhances the comprehensive utilization economic benefit of the iron-containing dust mud.
Technique for comprehensively utilizing iron-containing dust mud
The invention discloses a technique for comprehensively utilizing iron-containing dust mud, which is characterized by comprising the following steps: preparing iron-containing dust mud into blocks or balls by block pressing, ball pressing or balling, drying the ball or blocky red mud, adding the red mud into a rotary hearth furnace, carrying out ZnO removal, alkali metal removal and FeOx pre-reduction on the dust mud in the rotary hearth furnace technique, recovering ZnO from rotary hearth furnace flue gas, and pre-reducing to obtain the metalized pellet DRI; and adding the DRI generated from the rotary hearth furnace into a melting furnace to perform slag-iron separation, sending the separated molten iron into a steelmaking technique, and carrying out concurrent heating hardening and tempering on the dust mud molten slag separated from the metal, wherein the product can be used for producing cement, mineral wool, microcrystalline glass or other high-added-value silicate products. Thus, the technique enhances the comprehensive utilization efficiency of the whole iron-containing dust mud, and enhances the comprehensive utilization economic benefit of the iron-containing dust mud.
Technique for comprehensively utilizing iron-containing dust mud
PENG CHENG (author) / FAN JIANFENG (author)
2015-06-10
Patent
Electronic Resource
English
IPC:
C22B
PRODUCTION OR REFINING OF METALS
,
Gewinnen oder Feinen von Metallen
/
C03B
Herstellung oder Formgebung von Glas, Mineral- oder Schlackenwolle
,
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
/
C03C
Chemische Zusammensetzungen für Gläser, Glasuren oder Emails
,
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
/
C04B
Kalk
,
LIME
Method for comprehensively utilizing dilute sulfuric acid-containing wastewater
| European Patent Office | 2020