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Title:
COMPREHENSIVE UTILIZATION METHOD FOR BOTTOM-TOP COMPOSITE BLOWING SMELTING REDUCTION OF HIGH-IRON RED MUD
Document Type and Number:
WIPO Patent Application WO/2022/227184
Kind Code:
A1
Abstract:
A comprehensive utilization method for bottom-top composite blowing smelting reduction of high-iron red mud, the method mainly comprising the following steps: mixing high-iron red mud with a reducing agent, a slag former and fluorite; adding the mixed raw materials into a molten pool of a reduction furnace, and performing a reduction reaction, wherein during the reduction process, oxygen-enriched air and fuel gas are blown from the top and a mixed gas of a reducing gas and oxygen is blown from the bottom; and carrying out bottom-top composite blowing smelting reduction to obtain low-sulfur and low-phosphorus pig iron and reducing slag, and hot-state reducing slag being subjected to tempering, centrifugation and wire drawing to prepare a rock wool product. By means of bottom-top composite blowing smelting reduction of the present invention, the continuous reduction of high-iron red mud can be achieved, a low-residue and high-quality pig iron product is directly obtained, and the reduction rate of iron reaches 95% or more, while the recovery rate of sodium oxide reaches 70% or more.

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Inventors:
ZHANG TINGAN (CN)
DOU ZHIHE (CN)
LV GUOZHI (CN)
GUO JUNHUA (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
HE JICHENG (CN)
Application Number:
PCT/CN2021/096802
Publication Date:
November 03, 2022
Filing Date:
May 28, 2021
Export Citation:
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Assignee:
UNIV NORTHEASTERN (CN)
DONGDA NONFERROUS SOLID WASTE TECH RESEARCH INSTITUTE LIAOLING CO LTD (CN)
International Classes:
C21B13/00; C03C13/06; C04B7/147; C22B7/04; C22B26/10; F27D17/00
Foreign References:
CN110172539A2019-08-27
CN110055365A2019-07-26
CN110066923A2019-07-30
CN101705360A2010-05-12
CN111394534A2020-07-10
CN102816880A2012-12-12
ITRM20100523A12012-04-09
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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