Title:
METHOD FOR RECOVERING VALUABLE COMPONENTS FROM ZINC SMELTING SLAG
Document Type and Number:
WIPO Patent Application WO/2019/071789
Kind Code:
A1
Abstract:
A method for recovering valuable components from zinc smelting slag. The method comprises the following steps: S1, adding zinc smelting slag to a heat insulating device or a smelting reaction device from which slag may flow out, and adding calcium-based minerals and additives to form mixed slag, heating the mixed slag to a molten state so as to form reaction slag, monitoring the reaction slag in real time, and obtaining a slag after a reaction is complete by means of regulating and controlling the temperature of the reaction slag and the specific value of alkalinity Cao/SiO2; and S2, performing sedimentation separation on the obtained slag to obtain smoke dust containing a ferrous silicate mineral phase, a copper-rich phase and an iron-rich phase and smoke dust containing zinc, lead, bismuth and indium, and migrating and enriching gold and silver components to enter the copper-rich phase; and recovering all the phases. The copper-containing slag (copper-containing slag smaller than 0. 1 wt%) may be lowered. Furthermore, components such as copper, iron, gold, silver, lead, zinc, indium, bismuth, sodium and potassium may be recovered efficiently, and low-copper materials containing iron are obtained. The metal recovery rate is high, the production cost is low, environmental friendliness is achieved, and the economic gains are high.
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Inventors:
ZHANG LI (CN)
ZHANG WU (CN)
ZHANG WU (CN)
Application Number:
PCT/CN2017/115644
Publication Date:
April 18, 2019
Filing Date:
December 12, 2017
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C22B7/04; C22B11/02; C22B13/02; C22B19/30; C22B58/00
Foreign References:
| CN106755654A | 2017-05-31 | |||
| CN106755656A | 2017-05-31 | |||
| CN106755652A | 2017-05-31 | |||
| CN106755651A | 2017-05-31 | |||
| CN87102831A | 1988-11-02 | |||
| US4141722A | 1979-02-27 |
Attorney, Agent or Firm:
BEIJING EASY JOY SOON IP AGENT LTD. (CN)
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