Improvement of concentrate quality

Patent metadata

Field	Value
Publication number	US-2017274389-A1
Application number	US-201515528952-A
Country	US
Kind code	A1
Filing date	Nov 26, 2015
Priority date	Nov 27, 2014
Publication date	Sep 28, 2017
Grant date	—

Abstract

The present invention relates to a process for the separation of at least one valuable matter containing material from a dispersion comprising said at least one valuable matter containing material and at least one second material. The process according to the present invention comprises at least the steps (A) to (E) and the optional steps (F) to (H) which are described herein.

First claim

1 .- 15 . (canceled)

16 . A process for the separation of at least one valuable matter containing material from a dispersion comprising said at least one valuable matter containing material and at least one second material, wherein the process comprises the following steps:
(A) providing a first dispersion I comprising a dispersion medium I, the at least one valuable matter containing material and the at least one second material; (B) contacting dispersion I of step (A) with at least one magnetic particle; (C) separating a first magnetic fraction I from dispersion I by applying a magnetic field, wherein the magnetic fraction I comprises the at least one magnetic particle and the at least one valuable matter containing material; (D) redispersing the magnetic fraction I in at least one dispersion medium II to obtain a dispersion II; and (E) separating a second magnetic fraction II from dispersion II, wherein the magnetic fraction II comprises at least one magnetic particle and at least one valuable matter containing material.

17 . The process according to claim 16 , wherein said at least one dispersion medium II is water.

18 . The process according to claim 16 , wherein the separation of magnetic fraction II from dispersion II in step (E) is conducted by applying a magnetic field, flotation, dense media separation, gravity separation, spiral concentrator and combinations thereof and by applying a magnetic field.

19 . The process according to claim 16 , wherein the valuable matter containing material of the magnetic fraction I in step (C) has a first grade of at least one valuable matter and wherein the valuable matter containing material of the magnetic fraction II in step (E) has a second grade of the at least one valuable matter,
wherein the second grade of the at least one valuable matter obtained in step (E) is higher than the first grade of the at least one valuable matter obtained in step (C), and wherein the ratio of the second grade to the first grade of the at least one valuable matter is at least 1.2.

20 . The process according to claim 19 , wherein the ratio of the second grade to the first grade of the at least one valuable matter is at least 4.0.

21 . The process according to claim 16 , wherein the at least one valuable matter containing material has been pre-treated with at least one collector or wherein at least one collector is added in step (A) or (B),
and wherein the at least one collector is an ionizing collector or a non-ionizing collector, and wherein most preferably the at least one collector is selected from:

or a derivative thereof.

22 . The process according to claim 21 , wherein said at least one collector is a compound of formula (I) or derivative thereof
[(A) m (Z) n]o   (I)
and wherein
each A is independently selected from C 1 -C 30 -alkyl, C 2 -C 30 -alkenyl C 1 -C 30 -heteroalkyl, C 6 -C 30 -aryl, C 6 -C 30 -cycloalkyl, C 6 -C 30 -heteroalkyl, C 6 -C 30 -heterocycloalkyl, C 6 -C 30 -aralkyl, each of which may be unsubstituted or optionally substituted;
each Z is independently selected from anionic groups, cationic groups or non-ionic groups; m is an integer of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; n is an integer of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; and o is an integer of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 to 100.

23 . The process according to claim 22 , wherein
Z is selected from: a)

b)

or

c)

wherein each X is independently selected from the group consisting of O, S, NH, CH 2 and each p is independently selected from the integer 0, 1 or 2 and each X A is independently selected from O or S.

24 . The process according to claim 22 , wherein said at least one collector is

or a derivative thereof.

25 . The process according to claim 16 , wherein the at least one valuable matter is selected from the group consisting of Ag, Au, Pt, Pd, Rh, Ru, Ir, Os, Cu, Mo, Ni, Mn, Zn, Pb, Te, Sn, Hg, Re, V, Fe; and combinations or alloys thereof.

26 . The process according to claim 16 , wherein the at least one valuable matter is selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt; and combinations or alloys thereof.

27 . The process according to claim 16 , wherein the at least one valuable matter comprising material is present in form of an ore mineral.

28 . The process according to claim 16 , wherein dispersion I in step (A) comprises ore-bearing slag and/or wet ore tailing comprising at least one valuable matter containing material.

29 . The process according to claim 16 , wherein dispersion I obtained in step (B) comprises from about 5 to about 40% by weight solid content wherein the solid content is based on the total amount of solids present.

30 . The process according to claim 16 , wherein the magnetic particle is selected from the group consisting of magnetic metals and mixtures thereof, ferromagnetic alloys of magnetic metals and mixtures thereof, magnetic iron oxides, or cubic ferrites of general formula (II)
M 2+ x Fe 2+ 1-x Fe 3+ 2 O 4   (II)
wherein M is selected from Co, Ni, Mn, Zn or mixtures thereof and x is ≦1, hexagonal ferrites and mixtures thereof.

31 . The process according to claim 16 , wherein the at least one magnetic particle is a hydrophobized magnetic particle.

32 . The process according to claim 31 , wherein the at least one hydrophobized magnetic particle is a magnetic particle treated with a hydrophobizing agent, and the hydrophobizing agent is a compound of formula (IV) or derivative thereof
R 5 v —Si(OR 6 ) 4-v   (IV)
wherein each R 5 is independently selected from hydrogen; linear or branched, optionally substituted C 1 -C 30 -alkyl; linear or branched, optionally substituted C 2 -C 30 -alkenyl; linear or branched, optionally substituted C 2 -C 30 -alkynyl; optionally substituted C 3 -C 20 -cycloalkyl; optionally substituted C 3 -C 20 -cycloalkenyl; optionally substituted C 1 -C 20 -heteroalkyl; optionally substituted C 5 -C 22 -aryl; optionally substituted C 6 -C 23 -alkylaryl; optionally substituted C 6 -C 23 -arylalkyl; optionally substituted C 6 -C 22 -heteroaryl; each R 6 is independently selected from hydrogen; linear or branched, optionally substituted C 1 -C 30 -alkyl; linear or branched, optionally substituted C 2 -C 30 -alkenyl; linear or branched, optionally substituted C 2 -C 30 -alkynyl; optionally substituted C 3 -C 20 -cycloalkyl; optionally substituted C 3 -C 20 -cycloalkenyl; optionally substituted C 1 -C 20 -heteroalkyl; optionally substituted C 5 -C 22 -aryl; optionally substituted C 6 -C 23 -alkylaryl; optionally substituted C 6 -C 23 -arylalkyl; optionally substituted C 5 -C 22 -heteroaryl; and v is the integer 1, 2 or 3.

33 . The process according to claim 31 , wherein the compound of formula (IV) or derivative thereof is a compound selected from the group consisting of (NaO)(CH 3 )Si(OH) 2 , (NaO)(C 2 H 5 )Si(OH) 2 , (NaO)(C 5 H 11 )Si(OH) 2 , (NaO)(C 8 H 17 )Si(OH) 2 , (KO)(CH 3 )Si(OH) 2 , (KO)(C 2 H 5 )Si

Assignees

• Basf Se

Inventors

• Shishkov Igor
• Rohde Wolfgang
• Michailovski Alexej
• Luz Andreas
• Rieger Reinhold
• John Petra
• Domke Imme

Classifications

• B03C2201/18

  Magnetic separation whereby the particles are suspended in a liquid · CPC title

• B03C1/01 Primary

  by addition of magnetic adjuvants · CPC title

• Y02P10/20

  Recycling · CPC title