Title:
EFFICIENT ENRICHMENT, SEPARATION, AND RECOVERY METHOD FOR CHROMIUM IN CHROMIUM-CONTAINING SLUDGE IN IRON AND STEEL PLANT
Document Type and Number:
WIPO Patent Application WO/2023/004926
Kind Code:
A1
Abstract:
An efficient enrichment, separation, and recovery method for chromium in chromium-containing sludge in an iron and steel plant. The method comprises: drying and grinding raw materials, and then adding Fe2O3 powder accounting for 5.0-15.0% of the mass of a chromium-containing sludge dry material, mixing same with toner of which the amount is identical to that of a Fe2O3 substance, preparing a pellet, performing reducing roasting on the pellet in a temperature range of 900-1,200ºC, crushing the roasted product, performing ore milling on same, and controlling the ore milling particle size at a particle level of -0.074 mm and a content greater than or equal to 80.0.
Inventors:
HUA SHAOGUANG (CN)
WANG DAYA (CN)
LI XIANGMEI (CN)
LI SHUQIN (CN)
PEI DEJIAN (CN)
LI BIAO (CN)
WANG DAYA (CN)
LI XIANGMEI (CN)
LI SHUQIN (CN)
PEI DEJIAN (CN)
LI BIAO (CN)
Application Number:
PCT/CN2021/116008
Publication Date:
February 02, 2023
Filing Date:
September 01, 2021
Export Citation:
Assignee:
SINOSTEEL MAANSHAN GENERAL INSTITUTE OF MINING RES CO LTD (CN)
International Classes:
C22B34/32; B03C1/02; C04B7/147; C04B33/135; C22B1/02; C22B1/24
Foreign References:
| CN111455170A | 2020-07-28 | |||
| CN109402378A | 2019-03-01 | |||
| CN109627027A | 2019-04-16 | |||
| CN109371233A | 2019-02-22 | |||
| CN110129558A | 2019-08-16 | |||
| US4917726A | 1990-04-17 |
Attorney, Agent or Firm:
MA'ANSHAN CITY JINQIAO PATENT AGENT LTD. (CN)
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