Title:
METHOD FOR SMELTING REDUCTION PRODUCTION OF ZINC SMELTING SLAG
Document Type and Number:
WIPO Patent Application WO/2019/071791
Kind Code:
A1
Abstract:
A method for smelting reduction production of zinc smelting slag. The method comprises the following steps: S1, adding zinc smelting slag to a heat preservation device or a smelting reaction device from which slag may flow out, adding calcium minerals and additives, heating the same to a molten state, adding one or more of copper oxide minerals, copper sulfide minerals and copper-containing materials, monitoring the reaction slag in real time, and obtaining a slag 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, migrating and enriching gold and silver components so as to enter the copper-rich phase, and separating each phase. Copper-containing slag (copper-containing slag smaller than 0.1 wt%) may be reduced by using the described method, and furthermore, components such as copper, iron, gold, silver, lead, zinc, indium, bismuth, sodium and potassium may be recovered efficiently, and thus 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.
Inventors:
ZHANG LI (CN)
ZHANG WU (CN)
ZHANG WU (CN)
Application Number:
PCT/CN2017/115646
Publication Date:
April 18, 2019
Filing Date:
December 12, 2017
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C22B7/04; C22B19/00
Foreign References:
| CN101126133A | 2008-02-20 | |||
| CN106755651A | 2017-05-31 | |||
| US5865872A | 1999-02-02 | |||
| CN104561564A | 2015-04-29 | |||
| CN102851513A | 2013-01-02 |
Attorney, Agent or Firm:
BEIJING EASY JOY SOON IP AGENT LTD. (CN)
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