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Title:
METHOD FOR DECALCIFICATION OF MAGNESITEWITH REVERSE FLOTATION BY USING EDDHA INHIBITOR
Document Type and Number:
WIPO Patent Application WO/2020/220380
Kind Code:
A1
Abstract:
A method for decalcification of magnesite with reverse flotation by using an EDDHA inhibitor, belonging to the field of magnesite beneficiation and purification processes. In the method, high-calcium low-grade magnesite is crushed and ball-milled, and then water and an EDDHA inhibitor are added to adjust the pulp; the EDDHA inhibitor: magnesite pulp is (60 to 90) mg:1L in a solid-to-liquid ratio; and the mass concentration of the magnesite pulp is 10 to 30%. The pH value of the magnesite pulp is adjusted to10 - 12, and then sodium oleate is added for reverse flotation, rougher flotation and decalcification are performed so as to obtain a low-calcium magnesite concentrate. The recovery rate thereof is 70 to 85%, and the recovery rate of MgO in the low-calcium magnesite concentrate is 65 to 85%. The method uses the difference in the floatability of magnesite and impurity mineral dolomite in magnesite under the effect of an EDDHA inhibitor to remove calcium mineral in magnesite by means of reverse flotation, thereby improving the quality of magnesite and providing a new agent for beneficiation and decalcification of high-calcium low-grade magnesite.

Inventors:
SUN HAORAN (CN)
YIN WANZHONG (CN)
TANG YUAN (CN)
YANG BIN (CN)
HAN HUILI (CN)
YAO JIN (CN)
Application Number:
PCT/CN2019/085487
Publication Date:
November 05, 2020
Filing Date:
May 05, 2019
Export Citation:
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Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
B03D1/00; B03B9/00; B03D1/01; B03D101/06
Foreign References:
CN86102011A1987-11-11
SU1632499A11991-03-07
CN106345616A2017-01-25
CN107774454A2018-03-09
US4043902A1977-08-23
Other References:
WANG JIN-LIANG, YANG XIU-HUA: "Study on separability of dolomite from magnesite ores", CHINA NON-METALLIC MINERALS INDUSTRY, no. 4, 25 August 2010 (2010-08-25), pages 26 - 29, XP055749714, ISSN: 1007-9386
WANG, QIANQIAN, LI XIAOAN, WEI DEZHOU ,ZHANG SIHUI: "Results comparison of magnesite reverse flotation by two kinds collectors", METAL MINE, no. 2, 15 February 2012 (2012-02-15), pages 1 - 5, XP055749721, ISSN: 1001-1250
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO.,LTD (CN)
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