Title:
METHOD FOR PRODUCING NICKEL SULFATE AND COBALTOUS SULFATE BY PURIFICATION OF LATERITE NICKEL ORE SULFURIC ACID LEACHING SOLUTION AND SILICA GEL CHELATE RESIN
Document Type and Number:
WIPO Patent Application WO/2019/174103
Kind Code:
A1
Abstract:
A method for producing nickel sulfate and cobaltous sulfate by purification of a laterite nickel ore sulfuric acid leaching solution and silica gel chelate resin, comprising: 1) grinding laterite nickel ores (limonite type, transition layer type and detritus layer type) to -0.15 mm of ore powder accounting for 95% or above; 2) adding sulfuric acid and water into the ground transition layer type laterite nickel ore to carry out atmospheric pressure leaching and separate a leaching solution 1 and filter residue 1; 3) placing the limonite type laterite nickel ore into an autoclave, and adding sulfuric acid and water to carry out high pressure leaching to separate a leaching solution 2 from a filter residue 2; 4) adding the leaching solutions into the detritus layer type laterite nickel ore to carry out neutralization, impurity removal and leaching to separate a neutralization solution and a filter residue 3; 5) adding hydrogen peroxide for reaction precipitation, and performing solid-liquid separation to separate a filtrate and a filter residue 4; 5) performing silica gel chelating resin separation on the filtrate to produce nickel sulfate and cobaltous sulfate; 6) adding pulverized coal into the filter residues, conducting magnetization roasting, then conducting weak magnetic separation to separate iron ore concentrate and tailings; 7) removing manganese from a tail liquid; and 8) discharging the tailings.
Inventors:
LI BIN (CN)
Application Number:
PCT/CN2018/083897
Publication Date:
September 19, 2019
Filing Date:
April 20, 2018
Export Citation:
Assignee:
LI BIN (CN)
International Classes:
B03C1/015; C22B23/00; C22B3/08; C22B3/24
Foreign References:
| CN102268537A | 2011-12-07 | |||
| CN104611558A | 2015-05-13 | |||
| CN101805828A | 2010-08-18 | |||
| CN102226236A | 2011-10-26 |
Attorney, Agent or Firm:
BEIJING BEIXIN-ZHICHENG INTELLECTUAL PROPERTY AGENT CO., LTD. (CN)
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