Title:
METHOD FOR PRODUCING HIGH-NICKEL MATTE BY MEANS OF REDUCTION SULFIDATION SMELTING OF LATERITE-NICKEL ORE
Document Type and Number:
WIPO Patent Application WO/2024/031789
Kind Code:
A1
Abstract:
A method for producing high-nickel matte by means of reduction sulfidation smelting of laterite-nickel ore, comprising: mixing laterite-nickel ore with a reducing agent, a sulfidizing agent and a flux to prepare pellets, and performing selective pre-reduction-sulfidation roasting on same; causing the pre-sulphidation roasted material to enter a side-blown converter, and then adding a reducing agent, a sulfidizing agent and a flux for a reduction-sulfidation reaction to obtain low-nickel matte and smelting slag; performing converting-slagging treatment on the low-nickel matte to obtain high-nickel matte and converting slag; performing fusing oxidation on the smelting slag and/or the converting slag to generate ferroferric oxide; cooling same to obtain nickel-cobalt-rich magnetite; and performing graded magnetic separation to obtain iron ore concentrate and nickel-cobalt-rich matte slag. The use of a rotary kiln and the side-blown converter to perform continuous reduction sulfidation smelting of laterite nickel ore to produce low-nickel matte can effectively enrich and extract nickel, cobalt and other valuable metals, and involves a simple process, good safety and environment friendliness, high heat efficiency and low overall energy consumption. The whole system has a nickel recovery rate of 90-98% and a cobalt recovery rate of 90-97%, thus achieving a high economic value.
More Like This:
Inventors:
TANG SHIJIAN (CN)
LI CHANGDONG (CN)
YUE XIONG (CN)
LIU YUNTAO (CN)
RUAN DINGSHAN (CN)
CHEN XULIN (CN)
LI CHANGDONG (CN)
YUE XIONG (CN)
LIU YUNTAO (CN)
RUAN DINGSHAN (CN)
CHEN XULIN (CN)
Application Number:
PCT/CN2022/120357
Publication Date:
February 15, 2024
Filing Date:
September 21, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
C22B23/02; C22B1/02; C22B23/00
Domestic Patent References:
| WO2009129653A1 | 2009-10-29 |
Foreign References:
| CN111378851A | 2020-07-07 | |||
| CN114350977A | 2022-04-15 | |||
| CN107699703A | 2018-02-16 | |||
| CN111424167A | 2020-07-17 | |||
| CN102703731A | 2012-10-03 | |||
| CN101285128A | 2008-10-15 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
Download PDF:
Previous Patent: FORCE FEEDBACK DEVICE
Next Patent: METHOD FOR TREATMENT OF WASTE LITHIUM BATTERY POSITIVE ELECTRODE SHEET AND APPLICATION
Next Patent: METHOD FOR TREATMENT OF WASTE LITHIUM BATTERY POSITIVE ELECTRODE SHEET AND APPLICATION