Title:
METHOD FOR PREPARING SILICON-POTASSIUM-CALCIUM COMPOUND FERTILIZER BY USING CALCIUM-CONTAINING RED MUD
Document Type and Number:
WIPO Patent Application WO/2022/227181
Kind Code:
A1
Abstract:
A method for preparing a silicon-potassium-calcium compound fertilizer by using calcium-containing red mud, comprising the following steps: (1) mixing a mother solution containing potassium metaaluminate with the calcium-containing red mud, or mixing a mixed mother solution containing potassium metaaluminate and sodium metaaluminate with the calcium-containing red mud; (2) heating the mixed slurry to 210-260°C, stirring and leaching; (3) performing flash evaporation on the leached material, and then performing solid-liquid separation to obtain a transformation liquid and transformation slag; and a solid phase in the transformation slag being mainly potassium aluminosilicate hydrate, washing and drying to prepare the silicon-potassium-calcium compound fertilizer. According to the method in the present invention, an approach in which the calcium-containing red mud is leached by using the potassium metaaluminate mother solution is used, so that the silicon-potassium-calcium compound fertilizer can be prepared, and harmless utilization of the red mud is achieved; part of aluminum oxide and a large amount of sodium oxide in the red mud can be extracted, and valuable component recovery is achieved.
Inventors:
ZHANG TINGAN (CN)
LV GUOZHI (CN)
DOU ZHIHE (CN)
CHAO XI (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
HE JICHENG (CN)
LV GUOZHI (CN)
DOU ZHIHE (CN)
CHAO XI (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
HE JICHENG (CN)
Application Number:
PCT/CN2021/096795
Publication Date:
November 03, 2022
Filing Date:
May 28, 2021
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
DONGDA NONFERROUS SOLID WASTE TECH RESEARCH INSTITUTE LIAOLING CO LTD (CN)
DONGDA NONFERROUS SOLID WASTE TECH RESEARCH INSTITUTE LIAOLING CO LTD (CN)
International Classes:
C05G1/00; C01F7/02; C01D1/02
Foreign References:
| CN109250741A | 2019-01-22 | |||
| CN108975364A | 2018-12-11 | |||
| CN103934258A | 2014-07-23 | |||
| CN101607725A | 2009-12-23 | |||
| CN107298452A | 2017-10-27 | |||
| CN103030160A | 2013-04-10 | |||
| CN106187550A | 2016-12-07 | |||
| CN107892630A | 2018-04-10 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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