Title:
METHOD FOR PREPARING ULTRA-PURE IRON CONCENTRATE BY DEEP PROCESSING OF COMMERCIAL-GRADE MAGNETITE CONCENTRATE
Document Type and Number:
WIPO Patent Application WO/2022/052719
Kind Code:
A1
Abstract:
Disclosed is a method for preparing an ultra-pure iron concentrate by deep processing of a commercial-grade magnetite concentrate, comprising: respectively using the following processes: one-stage ore grinding and classification, one-stage weak magnetic separation, concentration and dewatering of the concentrate subjected to one-stage weak magnetic separation, two-stage ore grinding and classification, two-stage weak coarse magnetic separation, demagnetization and two-stage weak concentrated magnetic separation, and demagnetization and concentration of the concentrate subjected to two-stage weak concentrated magnetic separation: performing demagnetization processing on the concentrate subjected to two-stage weak concentrated magnetic separation, and then performing concentration and reverse flotation processes on same to finally obtain an ultra-pure iron concentrate in which TFe has a grade of 72.10%-72.19%, SiO2 has a content of 0.18%-0.20%, and an acid insoluble substance has a content of 0.15%-0.17%. At the same time, a high-purity iron concentrate having a TFe grade of 70.86%-71.12% can be obtained. The collecting agent in the reverse flotation process of the present invention is prepared by heating and modification treatments of dodecylamine and a glacial acetic acid solution according to a mass ratio of 4:1. The method of the present invention has a strong applicability, and is highly efficient and energy-saving. The flotation reagent system is simple. The present invention has excellent performances such as wide range of sources, small dosage, better selectivity, and environmental friendliness.
More Like This:
Inventors:
WANG HAILIANG (CN)
SHEN JINJIE (CN)
GAO CHUNQING (CN)
LUO HONGZHEN (CN)
HOU GENGHE (CN)
YANG RENXIN (CN)
SHEN JINJIE (CN)
GAO CHUNQING (CN)
LUO HONGZHEN (CN)
HOU GENGHE (CN)
YANG RENXIN (CN)
Application Number:
PCT/CN2021/111870
Publication Date:
March 17, 2022
Filing Date:
August 10, 2021
Export Citation:
Assignee:
SINOSTEEL MAANSHAN GENERAL INSTITUTE OF MINING RES CO LTD (CN)
HUAWEI NATIONAL ENGINEERING RES CENTER OF HIGH EFFICIENT RECYCLE AND UTILIZ (CN)
ENGINEERING INVESTIG & DESIGN INSTITUTE OF SINOSTEEL MIMR CO LTD (CN)
HUAWEI NATIONAL ENGINEERING RES CENTER OF HIGH EFFICIENT RECYCLE AND UTILIZ (CN)
ENGINEERING INVESTIG & DESIGN INSTITUTE OF SINOSTEEL MIMR CO LTD (CN)
International Classes:
B03B9/00; B03B7/00; B03D1/008; B03D1/01; B03D101/02; B03D103/04
Domestic Patent References:
| WO2020097667A1 | 2020-05-22 |
Foreign References:
| CN111905918A | 2020-11-10 | |||
| CN112090578A | 2020-12-18 | |||
| CN110898958A | 2020-03-24 | |||
| CN109127122A | 2019-01-04 | |||
| CN104826728A | 2015-08-12 | |||
| CN102527492A | 2012-07-04 | |||
| US4319988A | 1982-03-16 |
Other References:
LI MINGYU;HUANG JINFU;JIANG LIJUN;WANG WENLONG;WAN JIAGUO: "Experiment Study on Producing Super-Grade Iron Concentrate Using an Iron Ore from Fushun", MODERN MINING, 25 July 2020 (2020-07-25), pages 116 - 120+135, XP055911509, ISSN: 1674-6082, DOI: 10.3969/j.issn.1674-6082.2020.07.034
ZOU WENBO XIA LIUYIN ZHONG HONG: "Study on the Flotation Performance of Quartz and Magnetite with Gemini Collector", METAL MINE, 15 June 2011 (2011-06-15), pages 70 - 80+92, XP055911513, ISSN: 1001-1250
ZOU WENBO XIA LIUYIN ZHONG HONG: "Study on the Flotation Performance of Quartz and Magnetite with Gemini Collector", METAL MINE, 15 June 2011 (2011-06-15), pages 70 - 80+92, XP055911513, ISSN: 1001-1250
Attorney, Agent or Firm:
MA'ANSHAN CITY JINQIAO PATENT AGENT LTD. (CN)
Download PDF: