AU2021103197A4 - Method for recovering copper and mica minerals from tungsten beneficiation tailing - Google Patents
Method for recovering copper and mica minerals from tungsten beneficiation tailing Download PDFInfo
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- mica
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- copper
- middling
- roughing
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- 239000010445 mica Substances 0.000 title claims abstract description 266
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 266
- 239000010949 copper Substances 0.000 title claims abstract description 202
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 201
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 71
- 239000010937 tungsten Substances 0.000 title claims abstract description 71
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 51
- 239000011707 mineral Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004140 cleaning Methods 0.000 claims abstract description 208
- 239000012141 concentrate Substances 0.000 claims abstract description 70
- 230000002000 scavenging effect Effects 0.000 claims abstract description 59
- 238000005188 flotation Methods 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 31
- 238000004537 pulping Methods 0.000 claims abstract description 31
- 238000012216 screening Methods 0.000 claims abstract description 23
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 40
- 239000004115 Sodium Silicate Substances 0.000 claims description 39
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 39
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 101710116850 Molybdenum cofactor sulfurase 2 Proteins 0.000 claims description 24
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 21
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 12
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 12
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims description 11
- 241001251094 Formica Species 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 238000011084 recovery Methods 0.000 abstract description 36
- 238000000926 separation method Methods 0.000 abstract description 6
- ALKZAGKDWUSJED-UHFFFAOYSA-N dinuclear copper ion Chemical compound [Cu].[Cu] ALKZAGKDWUSJED-UHFFFAOYSA-N 0.000 abstract description 2
- 235000010755 mineral Nutrition 0.000 description 46
- 239000003153 chemical reaction reagent Substances 0.000 description 18
- 229910001779 copper mineral Inorganic materials 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 6
- 239000011882 ultra-fine particle Substances 0.000 description 6
- 229910052626 biotite Inorganic materials 0.000 description 4
- 229910001919 chlorite Inorganic materials 0.000 description 4
- 229910052619 chlorite group Inorganic materials 0.000 description 4
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 3
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052627 muscovite Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052569 sulfide mineral Inorganic materials 0.000 description 2
- -1 Ca 2 Chemical class 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052656 albite Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- FRVMKTLTJFPELD-UHFFFAOYSA-N copper trimer Chemical compound [Cu].[Cu].[Cu] FRVMKTLTJFPELD-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000012106 screening analysis Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/08—Subsequent treatment of concentrated product
- B03D1/082—Subsequent treatment of concentrated product of the froth product, e.g. washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/08—Subsequent treatment of concentrated product
- B03D1/087—Subsequent treatment of concentrated product of the sediment, e.g. regrinding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
- C22B15/0004—Preliminary treatment without modification of the copper constituent
- C22B15/0008—Preliminary treatment without modification of the copper constituent by wet processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
OF THE DISCLOSURE
The present disclosure provides a method for recovering copper and mica minerals from a
tungsten beneficiation tailing. The method includes: subjecting the tungsten beneficiation tailing to
a first pulping operation and copper roughing, scavenging and cleaning operations to obtain a
copper concentrate; and performing a mica recovery process: subjecting a copper flotation tailing to
screening by using a Tyler standard sieve, and subjecting an obtained oversize product to a second
pulping operation and then a mica flotation operation including mica roughing, scavenging and
cleaning operations to obtain a high-quality mica concentrate. The process of the present disclosure
is advanced, and features desired separation indexes, a high recovery rate of valuable minerals,
stable operation and a low lower limit of particle size for flotation. It realizes the recovery of copper
and mica in the ultra-fine tungsten beneficiation tailing, improves the comprehensive recovery and
utilization of the valuable mineral resources, and brings considerable economic benefits to the
enterprise.
Sheet 1/3
2
First
pulping a b c
3
roughing
4 9 12 13
First copper Copper
cleaning scavenging
5 10
Second 16 18
copper 17 Screening
cleaning
6 , 11 19 S
Third copper "con d e f g h i j c
15 cleaning
15 \ ~ clacn~tng26
20\ Mica 27 f h j
roughing
21 2 '8 33 34 35
f c - First mica Mica
6cleang scavengmg
22 29
Second mica
clang
23 ,, 30
f c -jThird mica
|cleaning
24 31
Fourth mica
~~ cleaning
25 , , 32
Fifth mica
36 v cleaning
FIG. 1
Description
Sheet 1/3
2 First pulping a b c 3
roughing
4 9 12 13 First copper Copper cleaning scavenging
5 10 Second 16 18 copper 17 Screening cleaning 6 , 11 19 S Third copper "con d ef g h ij c cleaning 15 \ ~ clacn~tng26 20\ Mica 27 f h j roughing
21 2 '8 33 34 35 f c - First mica Mica 6cleang scavengmg
22 29 Second mica clang
23 ,, 30
f c -jThird mica |cleaning
24 31 Fourth mica ~~ cleaning
25 ,, 32 Fifth mica 36 v cleaning
FIG. 1
[01] The present disclosure belongs to the field of mineral processing, and relates to a method for recovering valuable minerals from a tungsten beneficiation tailing, in particular to a method for recovering copper and mica minerals from a tungsten beneficiation tailing.
[02] China is a country with poor mineral resources per capita, and 80% of the mineral resources are associated minerals. The tailings discharged by the mineral processing plant after enriching the targeted valuable minerals often include some associated valuable minerals that are difficult to beneficiate. Recovering these minerals can save resources, bring economic benefits to the enterprise, and can greatly reduce tailing discharge and reduce solid waste pollution. Tungsten is a national strategic resource and essential for modern industry. The value of tungsten is becoming increasingly important. In order to increase the recovery rate of tungsten, the tungsten beneficiation plant often grinds the raw tungsten ore to -0.075 mm particles may account for > 80% in the grinding operation. As a result, the associated valuable minerals in the tungsten ore become a large amount of ultra-fine secondary slime and enter into the tungsten beneficiation tailings, which greatly increases the difficulty of recovering the associated valuable minerals from the tungsten beneficiation tailings.
[03] The ultra-fine particles have always been a difficult problem in the beneficiation operation. When the -0.038 mm particles reach 50% and above, the sliming becomes very serious, and the specific surface area and surface energy of the particles are greatly increased. In the flotation operation, the adsorption capacity of these particles on the collector is enhanced, so the selectivity of the collector is weakened, and the depressant depresses the minerals in a non-selective manner. The valuable minerals and gangue minerals are intermingled with each other, and the positive and negative charged particles are non-selectively agglomerated and adsorbed, which makes it hard to improve the concentrate grade and recovery rate. In order to ensure effective flotation, desliming is generally performed in advance to remove the ultra-fine particles before the flotation is performed.
[04] China is the world's largest copper consumer, and the copper industry is an important industry in China's national economy. The beneficiation method to obtain copper minerals, especially copper sulfide minerals, is mainly flotation. Generally, copper sulfide minerals, easy-to-float mixed copper minerals and easy-to-float copper oxide minerals are all processed by flotation. Mica is an important non-metal resource and is widely used in modern industry. The mica minerals are often recovered by using the flotation method. Generally, the flotation treatment in the acid ore pulp is performed by using a cationic collector, and the flotation treatment in the alkaline ore pulp is performed by using an anion/cation mixed collector.
[05] The tungsten beneficiation tailings of the tungsten processing plant often exist in the form of ultra-fine particles (-0.038 mm particles account for more than 50%, and -0.026 mm particles account for more than 45%), which often include low-grade copper minerals dominant by copper sulfide and ultra-fine mica minerals. The copper grade generally reaches about 0.10%, and the mica content (including muscovite and biotite) can reach 10-30%. The recovery of the copper and mica minerals from the tungsten beneficiation tailings has high economic value and social benefits.
[06] In order to solve at least one of the technical problems existing in the prior art, an objective of the present disclosure is to provide a method for recovering copper and mica minerals from a tungsten beneficiation tailing. The method includes: subjecting the tungsten beneficiation tailing to a first pulping operation and copper roughing, scavenging and cleaning operations to obtain a copper concentrate; and performing a mica recovery process: subjecting a copper flotation tailing to screening by using a Tyler standard sieve, and subjecting an obtained oversize product to a second pulping operation and then a mica flotation operation including mica roughing, scavenging and cleaning operations to obtain a high-quality mica concentrate. The process of the present disclosure is advanced, and features desired separation indexes, a high recovery rate of valuable minerals, stable operation and a low lower limit of particle size for flotation. It realizes the recovery of copper and mica in the ultra-fine tungsten beneficiation tailing, improves the comprehensive recovery and utilization of the valuable mineral resources, and brings considerable economic benefits to the enterprise.
[07] A first aspect of the present disclosure provides a method for recovering copper and mica minerals from a tungsten beneficiation tailing. According to an example of the present disclosure, the method includes:
[08] (1) mixing the tungsten beneficiation tailing with water for first pulping to obtain a first ore pulp with a concentration of 30-35wt%;
[09] (2) mixing the first ore pulp with MOS-2, MA-i and JT2000 for copper roughing to obtain a copper roughing concentrate and a copper roughing underflow;
[10] (3) subjecting the copper roughing concentrate to copper cleaning to obtain a copper concentrate and a copper cleaning middling;
[11] (4) mixing the copper roughing underflow with MOS-2, MA-i and JT2000 for copper scavenging to obtain a copper flotation tailing and a copper scavenging middling;
[12] (5) subjecting the copper flotation tailing to screening to obtain an oversize product and a final tailing;
[13] (6) mixing the oversize product with water for second pulping to obtain a second ore pulp with a concentration of 16-20wt%;
[14] (7) adjusting a pH of the second ore pulp, and then mixing the second ore pulp with sodium silicate, sodium hexametaphosphate, sodium oleate, octadecylamine, dodecylamine and JT2000 for mica roughing to obtain a mica roughing concentrate and a mica roughing underflow;
[15] (8) subjecting the mica roughing concentrate to mica cleaning to obtain a mica concentrate and a mica cleaning middling; and
[16] (9) mixing the mica roughing underflow with sodium silicate, sodium oleate and dodecylamine for mica scavenging to obtain a mica scavenging middling and a mica scavenging tailing.
[17] According to the method for recovering copper and mica minerals from a tungsten beneficiation tailing in the example of the present disclosure, the tungsten beneficiation tailing is mixed with water for the first pulping to obtain a first ore pulp with a concentration of 30-35wt%. Then a mixed reagent of MOS-2, MA-1 and JT2000 is added to subject the first ore pulp to the copper roughing, that is, high-concentration flotation, such that the copper mineral is easy to float. Then the obtained copper roughing concentrate with a copper mineral is subjected to copper cleaning to obtain a copper concentrate. Meanwhile, the copper roughing underflow obtained by the copper roughing is mixed with a mixed reagent of MOS-2, MA-1 and JT2000 for copper scavenging, and the obtained copper flotation tailing is subjected to screening by using a Tyler standard sieve (Mesh size is 0.026 mm). In this way, difficult-to-float -0.026 mm ultra-fine particles are removed, and a +0.026 mm oversize product is obtained. The oversize product is subjected to the second pulping to obtain an ore pulp with a concentration of 16-20wt% for mica roughing, that is, low-concentration mica flotation. In the roughing operation, the pH is adjusted by sodium carbonate and sodium hydroxide, and then sodium silicate, sodium hexametaphosphate, sodium oleate, octadecylamine, dodecylamine and JT2000 are added. This eliminates the influence of unavoidable ions in the ore pulp on the mica flotation, fully disperses the ore pulp particles and depresses gangue minerals such as quartz and chlorite, and strengthens the collection of mica minerals. Then, the obtained mica roughing concentrate is subjected to mica cleaning to obtain the mica concentrate. The mica roughing underflow is mixed with sodium silicate, sodium oleate and dodecylamine for mica scavenging to obtain the mica scavenging middling and the mica scavenging tailing. The method of the present disclosure is advanced, and features desired separation indexes, a high recovery rate of valuable minerals, stable operation and a low lower limit of particle size for flotation. It realizes the recovery of copper and mica in the ultra-fine tungsten beneficiation tailing, improves the recovery efficiency of valuable mineral resources, and brings considerable economic benefits to the enterprise.
[18] In addition, the method for recovering copper and mica minerals from a tungsten beneficiation tailing in the example of the present disclosure may also have the following additional technical features:
[19] In some examples of the present disclosure, in step (1), in the tungsten beneficiation tailing, -0.075 mm particles may account for > 80%, -0.038 mm particles may account for > 50%, and -0.028 mm particles may account for > 45 %.
[20] In some examples of the present disclosure, in step (2), 25-30 g of MOS-2, 20-25 g of MA-i and 20 g of JT2000 may be added based on1 t of dry tungsten beneficiation tailing. Thus, the present disclosure can realize high-efficiency flotation of the copper mineral.
[21] In some examples of the present disclosure, step (3) may include: (3-1) subjecting the copper roughing concentrate to first copper cleaning to obtain a first copper cleaning froth product and a first copper cleaning middling, and subjecting the first copper cleaning middling to the copper roughing in step (2); (3-2) subjecting the first copper cleaning froth product to second copper cleaning to obtain a second copper cleaning froth product and a second copper cleaning middling, and subjecting the second copper cleaning middling to the first copper cleaning in step (3-1); and (3-3) subjecting the second copper cleaning froth product to third copper cleaning to obtain a copper concentrate and a third copper cleaning middling, and subjecting the third copper cleaning middling to the second copper cleaning in step (3-2). Thus, the present disclosure can realize the recovery of the copper concentrate.
[22] In some examples of the present disclosure, in step (4), 12-15 g of MOS-2, 10-12 g of MA-i and 10 g of JT2000 may be added based on1 t of dry tungsten beneficiation tailing. Thus, the present disclosure can improve the recovery rate of the copper concentrate.
[23] In some examples of the present disclosure, in step (4), the copper scavenging middling may be subjected to the copper roughing in step (2). Thus, the present disclosure can improve the recovery rate of the copper concentrate.
[24] In some examples of the present disclosure, in step (5), the sieve used for the screening may have a mesh size of 0.026 mm.
[25] In some examples of the present disclosure, in step (7), the pH of the second ore pulp may be adjusted to 10.5-11 by sodium carbonate and sodium hydroxide.
[26] In some examples of the present disclosure, in step (7), 300-400 g of sodium carbonate and 100-120 g of sodium hydroxide may be added based on 1 t of dry tungsten beneficiation tailing.
[27] In some examples of the present disclosure, in step (7), 1,500-1,800 g of sodium silicate, 500-700 g of sodium hexametaphosphate, 150-200 g of sodium oleate, 30-50 g of octadecylamine, 100-120 g of dodecylamine and 20 g of JT2000 may be added based on 1 t of dry tungsten beneficiation tailing. Thus, the present disclosure can realize the high-efficiency flotation of mica.
[28] In some examples of the present disclosure, step (8) may include: (8-1) subjecting the mica roughing concentrate to first mica cleaning to obtain a first mica cleaning froth product and a first mica cleaning middling; (8-2) mixing the first mica cleaning froth product with sodium silicate and JT2000 for second mica cleaning to obtain a second mica cleaning froth product and a second mica cleaning middling; (8-3) subjecting the second mica cleaning froth product to third mica cleaning to obtain a third mica cleaning froth product and a third mica cleaning middling; (8-4) mixing the third mica cleaning froth product with sodium silicate and JT2000 for fourth mica cleaning to obtain a fourth mica cleaning froth product and a fourth mica cleaning middling; and (8-5) subjecting the fourth mica cleaning froth product to fifth mica cleaning to obtain a mica concentrate and a fifth mica cleaning middling. Thus, the present disclosure can realize the recovery of the mica concentrate.
[29] In some examples of the present disclosure, in step (8-2), 200-300 g of sodium silicate and g of JT2000 may be added based on 1 t of dry tungsten beneficiation tailing. Thus, the present disclosure can improve the recovery rate of the mica.
[30] In some examples of the present disclosure, in step (8-4), 100-200 g of sodium silicate and g of JT2000 may be added based on 1 t of dry tungsten beneficiation tailing. Thus, the present disclosure can improve the recovery rate of the mica.
[31] In some examples of the present disclosure, the method may further include: (10) combining the first mica cleaning middling, the second mica cleaning middling, the third mica cleaning middling, the fourth mica cleaning middling, the fifth mica cleaning middling and the mica scavenging middling, and then subjecting the combined middlings to the screening in step (5). Thus, the present disclosure can improve the recovery rate of the mica.
[32] In some examples of the present disclosure, in step (9), 500-600 g of sodium silicate, -100 g of sodium oleate and 50-60 g of dodecylamine may be added based on I t of dry tungsten beneficiation tailing. Thus, the present disclosure can improve the recovery rate of the mica.
[33] In some examples of the present disclosure, the method may further include: (11) combining the mica scavenging tailing obtained in step (9) into the final tailing obtained in step (5).
[34] Additional aspects and advantages of the present disclosure will be partly provided in the following description, and partly become evident in the following description or understood through the practice of the present disclosure.
[35] The above-mentioned and/or additional aspects and advantages of the present disclosure will become apparent and readily understandable from the description of the embodiments with reference to the following accompanying drawings.
[36] FIG. 1 is a schematic diagram of a method for recovering copper and mica minerals from a tungsten beneficiation tailing according to an example of the present disclosure.
[37] In FIG. 1, the flotation reagents used are: a: MOS-2 (collector); b: MA-1 (collector); c: JT2000 (frothing reagent); d: Na 2 CO 3 (adjuster); e: NaOH (adjuster); f: sodium silicate (dispersant and depressant); g: sodium hexametaphosphate (dispersant and depressant); h: sodium oleate (collector); i: octadecylamine (collector); j: dodecylamine (collector). All flotation reagents used in the present disclosure are commercially available from the market and have been publicly used in the prior art, among them, MOS-2, MA-1 and JT2000 are the abbreviated code symbols provided by the manufacturer.
[38] FIG. 2 is a flowchart of a method for recovering copper and mica minerals from a tungsten beneficiation tailing according to an example of the present disclosure.
[39] FIG. 3 is a flowchart of subjecting a copper roughing concentrate to copper cleaning according to an example of the present disclosure.
[40] FIG. 4 is a flowchart of subjecting a mica roughing concentrate to mica cleaning according to an example of the present disclosure.
[41] FIG. 5 is a flowchart of a method for recovering copper and mica minerals from a tungsten beneficiation tailing according to another example of the present disclosure.
[42] The examples of the present disclosure are described in detail below, and the reference numerals of the examples are shown in the accompanying drawings. The examples described below with reference to the accompanying drawings are illustrative, which are merely intended to explain the present disclosure, rather than to limit the present disclosure.
[43] The present disclosure provides a method for recovering copper and mica minerals from a tungsten beneficiation tailing. As shown in FIGS. 1 and 2, the method includes:
[44] S100: Mix the tungsten beneficiation tailing with water for first pulping.
[45] In this step, the tungsten beneficiation tailing 1 is mixed with water for first pulping 2, and a first ore pulp with a concentration of 30-35wt% is obtained after 8-10 min of stirring. In the tungsten beneficiation tailing, -0.075 mm particles account for > 80%, -0.038 mm particles account for > 50%, and -0.028 mm particles account for > 45 %. When the ore pulp concentration is greater than 35wt%, the particles are easy to agglomerate and difficult to disperse, and the intermingling of the particles affects the flotation efficiency. When the ore pulp concentration is less than 30wt%, the water consumption increases and the concentration of the reagent decreases, which is not conducive to flotation. It is most suitable to adjust the ore pulp to a high concentration (30-35wt%) in the first pulping, which can realize the high-concentration flotation of a copper concentrate. In addition, the ore pulp is adjusted to a suitable environment that facilitates the interaction between the reagent and the mineral, such that the copper concentrate is easy to be floated.
[46] S200: Mix the first ore pulp with MOS-2, MA-1 and JT2000 for copper roughing.
[47] In this step, the first ore pulp is mixed with MOS-2, MA-1 and JT2000 for copper roughing 3 to obtain a copper roughing concentrate 7 and a copper roughing underflow 8. In some examples of the present disclosure, in step (2), 25-30 g of MOS-2, 20-25 g of MA-1 and 20 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing. The efficient flotation of the copper mineral can be achieved by using the MOS-2 with good selectivity and the MA-1 with strong collecting ability in the above amount as a mixed collector to float the copper mineral.
[48] S300: Subject the copper roughing concentrate to copper cleaning.
[49] In this step, the copper roughing concentrate 7 is subjected to copper cleaning to obtain a copper concentrate 15 and a copper cleaning middling 9-11. According to an example of the present disclosure, referring to FIG. 3, subjecting a copper roughing concentrate to copper cleaning includes:
[50] S310: Subject the copper roughing concentrate to first copper cleaning.
[51] In this step, the copper roughing concentrate 7 is subjected to first copper cleaning 4 without adding a reagent to obtain a first copper cleaning froth product and a first copper cleaning middling 9, and the first copper cleaning middling 9 is subjected to the copper roughing in S200.
[52] S320: Subject the first copper cleaning froth product to second copper cleaning.
[53] In this step, the first copper cleaning froth product is subjected to second copper cleaning 5 without adding a reagent to obtain a second copper cleaning froth product and a second copper cleaning middling 10, and the second copper cleaning middling 10 is subjected to the first copper cleaning in S310.
[54] S330: Subject the second copper cleaning froth product to third copper cleaning.
[55] In this step, the second copper cleaning froth product is subjected to third copper cleaning 6 without adding a reagent to obtain a copper concentrate 15 and a third copper cleaning middling 11, and the third copper cleaning middling I Iis subjected to the second copper cleaning in S320.
[56] S400: Mix the copper roughing underflow with MOS-2, MA-1 and JT2000 for copper scavenging.
[57] In this step, the copper roughing underflow 8 is mixed with MOS-2, MA-1 and JT2000 for copper scavenging 13 to obtain a copper flotation tailing 14 and a copper scavenging middling 12. Further, 12-15 g of MOS-2, 10-12 g of MA-1 and 10 g of JT2000 are added based on I t of dry tungsten beneficiation tailing. The copper mineral not floating in the copper roughing 3 can effectively be floated in the copper scavenging 13. Therefore, the copper scavenging 13 improves the recovery rate of the copper mineral. It should be noted that the copper scavenging middling 12 is subjected to the copper roughing in S200.
[58] S500: Subject the copper flotation tailing to screening.
[59] In this step, the copper flotation tailing 14 is subjected to screening 16 to obtain an oversize product 17 and a final tailing 18. Specifically, the screening 16 is performed by using a Tyler standard sieve with a mesh size of 0.026 mm to obtain a +0.026 mm oversize product 17 and a -0.026 mm ultra-fine undersize product as a final tailing 18. The -0.026 mm ultra-fine mica particles are not easy to float, and there are other ultra-fine gangue minerals (such as quartz and chlorite) that are seriously charged. These charged minerals and mica agglomerate and wrap each other, which can easily reduce the mica flotation efficiency and affect the grade of the mica concentrate. Therefore, the screening operation is introduced in the flotation operation to remove the -0.026 mm ultra-fine particles.
[60] S600: Mix the oversize product with water for second pulping.
[61] In this step, the oversize product 17 is mixed with water for second pulping 19, and a second ore pulp with a concentration of 16-20wt% is obtained after 5-6 min of stirring. In the second pulping, the ore pulp is adjusted to a low concentration (16-20wt%), which is conducive to the mutual dispersion of the particles, reduces the intermingling and wrap caused by the charging of the particles, and can realize the low-concentration flotation of mica. In addition, the ore pulp is adjusted to a suitable environment that facilitates the interaction between the reagent and the mineral, such that the mica concentrate is easy to be floated.
[62] S700: Adjust a pH of the second ore pulp, and then mix the second ore pulp with sodium silicate, sodium hexametaphosphate, sodium oleate, octadecylamine, dodecylamine and JT2000 for mica roughing.
[63] In this step, the pH of the second ore pulp is adjusted, and then the second ore pulp is mixed with sodium silicate, sodium hexametaphosphate, sodium oleate, octadecylamine, dodecylamine and JT2000 for mica roughing 20 to obtain a mica roughing concentrate 26 and a mica roughing underflow 27. Specifically, the pH of the second ore pulp is adjusted to 10.5-11 by sodium carbonate and sodium hydroxide. Meanwhile, 300-400 g of sodium carbonate and 100-120 g of sodium hydroxide are added based on 1 t of dry tungsten beneficiation tailing. Further, 1,500-1,800 g of sodium silicate, 500-700 g of sodium hexametaphosphate, 150-200 g of sodium oleate, 30-50 g of octadecylamine, 100-120 g of dodecylamine and 20 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing. The sodium carbonate and the sodium hydroxide can effectively eliminate the unavoidable ions (such as Ca 2 , Mg2+ and Fe 3+) in the ore pulp, forming an ore pulp environment that is conducive to the combination of the collector and mica. The sodium silicate and the sodium hexametaphosphate can effectively disperse ore pulp particles and depress the silicate mineral, etc.
[64] S800: Subject the mica roughing concentrate to mica cleaning.
[65] In this step, the mica roughing concentrate 26 is subjected to mica cleaning to obtain a mica concentrate 36 and a mica cleaning middling 28-32. According to an example of the present disclosure, referring to FIG. 4, subjecting a mica roughing concentrate 26 to mica cleaning includes:
[66] S810: Subject the mica roughing concentrate to first mica cleaning.
[67] In this step, the mica roughing concentrate 26 is subjected to first mica cleaning 21 without adding a reagent to obtain a first mica cleaning froth product and afirst mica cleaning middling 28.
[68] S820: Mix the first mica cleaning froth product with water glass and JT2000 for second mica cleaning.
[69] In this step, the first mica cleaning froth product is mixed with sodium silicate and JT2000 for second mica cleaning 22 to obtain a second mica cleaning froth product and a second mica cleaning middling 29. Specifically, 200-300 g of sodium silicate and 15 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing.
[70] S830: Subject the second mica cleaning froth product to third mica cleaning.
[71] In this step, the second mica cleaning froth product is subjected to third mica cleaning 23 without adding a reagent to obtain a third mica cleaning froth product and a third mica cleaning middling 30.
[72] S840: Mix the third mica cleaning froth product with sodium silicate and JT2000 for fourth mica cleaning.
[73] In this step, the third mica cleaning froth product is mixed with sodium silicate and JT2000 for second mica cleaning 24 to obtain a fourth mica cleaning froth product and a fourth mica cleaning middling 31. Specifically, 100-200 g of sodium silicate and 10 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing.
[74] S850: Subject the fourth mica cleaning froth product to fifth mica cleaning.
[75] In this step, the fourth mica cleaning froth product is subjected to fifth mica cleaning 25 without adding a reagent to obtain a mica concentrate 36 and a fifth mica cleaning middling 32.
[76] S900: Mix the mica roughing underflow with sodium silicate, sodium oleate and dodecylamine for mica scavenging.
[77] In this step, the mica roughing underflow 27 obtained in S700 is mixed with sodium silicate, sodium oleate and dodecylamine for mica scavenging to obtain a mica scavenging middling 33 and a mica scavenging tailing 35. Specifically, in this step, 500-600 g of sodium silicate, 75-100 g of sodium oleate and 50-60 g of dodecylamine are added based on 1 t of dry tungsten beneficiation tailing.
[78] Further, referring to FIG. 5, the method for recovering copper and mica minerals from tungsten beneficiation tailing further includes:
[79] S1000: Combine the first mica cleaning middling, the second mica cleaning middling, the third mica cleaning middling, the fourth mica cleaning middling and the fifth mica cleaning middling obtained in S800 and the mica scavenging middling obtained in S900, and then subject the combined middlings to the screening in S500.
[80] In this step, the first mica cleaning middling 28, the second mica cleaning middling 29, the third mica cleaning middling 30, the fourth mica cleaning middling 31 and the fifth mica cleaning middling 32 obtained in S800 and the mica scavenging middling 33 obtained in S900 are combined and then subjected to the screening in S500. This realizes the recovery of the first mica cleaning middling, the second mica cleaning middling, the third mica cleaning middling, the fourth mica cleaning middling, the fifth mica cleaning middling and the mica scavenging middling, thereby improving the recovery rate of the mica.
[81] SI100: Combine the mica scavenging tailing into the final tailing.
[82] In this step, the mica scavenging tailing 35 obtained in S900 is combined into the final tailing 18 obtained in S500.
[83] According to the method for recovering copper and mica minerals from a tungsten beneficiation tailing in the example of the present disclosure, the tungsten beneficiation tailing is adjusted to a suitable operating environment through the first pulping operation. In the copper flotation operation, the mixed reagent of MOS-2 with good selectivity and MA-i with strong collecting ability is used to collect the copper mineral. Through the one roughing operation, one scavenging operation and three cleaning operations, the copper concentrate is obtained. In the mica recovery process, the copper flotation tailing is subjected to the screening operation by using a Tyler standard sieve (0.026 mm) to remove the -0.026 mm ultra-fine particles that are difficult to float. The obtained +0.026 mm oversize product is subjected to the second pulping operation and then the mica flotation operation. In the roughing operation, the combined adjusters, the combined dispersants and the mixed collectors are used to eliminate the influence of unavoidable ions in the ore pulp on the mica flotation, thereby fully dispersing the particles in the ore pulp and depressing gangue minerals such as quartz and chlorite, and strengthening the collection of the mica mineral. All middlings produced during the flotation process are combined and subjected to the screening operation, after dehydration and reagent removal, they enter into the second pulping operation again, through the one roughing operation, one scavenging operation and five cleaning operations, a high-quality mica concentrate is obtained. The flotation process of the present disclosure achieves the following separation indexes: copper concentrate yield > 0.296%, copper grade > 20.36%, copper recovery rate > 56.91%; mica concentrate yield i 13.291%, muscovite content > 73.36%, biotite content > 21.68% and mica recovery rate > 42.89%. Therefore, the process of the present disclosure is advanced, and features desired separation indexes, a high recovery rate of valuable minerals, stable operation and a low lower limit of particle size for flotation. It realizes the recovery of copper and mica in the ultra-fine tungsten beneficiation tailing, improves the recovery efficiency of valuable mineral resources, and brings considerable economic benefits to the enterprise.
[84] The present disclosure is described below with reference to the specific examples. It should be noted that these examples are only illustrative and do not limit the present disclosure in any way.
[85] The present disclosure includes a copper flotation operation and a mica flotation operation.
[86] The copper flotation operation includes: subject a tungsten beneficiation tailing 1 to first pulping 2 and copper roughing 3 to obtain a copper roughing concentrate 7 and a copper roughing underflow 8; subject the copper roughing concentrate 7 to first copper cleaning 4, second copper cleaning 5 and third copper cleaning 6 to obtain a copper concentrate 15; subject the copper roughing underflow 8 to copper scavenging 13 to obtain a copper flotation tailing 14; and sequentially return middlings obtained in the copper flotation operation to a previous operation.
[87] The mica flotation operation includes: subject the copper flotation tailing 14 to screening 16 to obtain an oversize product 17 and an ultra-fine undersize product (a final tailing 18); subject the oversize product 17 to second pulping 19 and mica roughing 20 to obtain a mica roughing concentrate 26 and a mica roughing underflow 27; subject the mica roughing concentrate 26 to first mica cleaning 21, second mica cleaning 22, third mica cleaning 23, fourth mica cleaning 24 and fifth mica cleaning 25 to obtain a mica concentrate 36; subject the mica roughing underflow 27 to mica scavenging 34 to obtain a mica scavenging tailing 35; combine afirst mica cleaning middling 28, a second mica cleaning middling 29, a third mica cleaning middling 30, a fourth mica cleaning middling 31, a fifth mica cleaning middling 32 and a mica scavenging middling 33, and subject the combined middlings to the screening 16; and combine the mica scavenging tailing 35 into the final tailing 18.
[88] The ultra-fine tungsten beneficiation tailing used in the example is a tailing discharged after tungsten beneficiation by a tungsten processing plant. The involved elements or mineral compositions include 0.11% of Cu, 45.46% of quartz, 21.22% of muscovite, 8.64% of biotite, 4.19% of albite, 1.54% of potash feldspar and 6.89% of chlorite. The copper minerals are mainly chalcopyrite. The particle size distribution of the tungsten beneficiation tailing is provided in the following table:
[89] Particle size /mm Proportion /% Undersize proportion /% >0.075 16.11 100.00 0.075~0.045 18.95 83.89 0.045~0.038 7.73 64.94 0.038~0.032 3.77 57.21 0.032~0.028 5.12 53.44 0.028~0.026 8.06 48.32 <0.026 40.26 40.26 Total 100.00
[90] Example 1
[91] A tungsten beneficiation tailing 1 was subjected to first pulping 2. In the first pulping 2, water was added to obtain an ore pulp with a mass concentration of 30.25%, and stirring was maintained for 8.5 min. After the first pulping, the ore pulp was subjected to copper roughing 3. In the copper roughing 3, 25 g/t of MOS-2, 20 g/t of MA-1 and 20 g/t of JT2000 were sequentially added. After the copper roughing 3, first copper cleaning 4, second copper cleaning 5 and third copper cleaning 6 were performed without adding a reagent, that is, blank cleaning. A froth product, namely a copper concentrate 15, was obtained in the third copper cleaning 6. An underflow 8 obtained in the copper roughing 3 was subjected to copper scavenging 13. In the copper scavenging 13, 12 g/t of MOS-2, 10 g/t of MA-1 and 10 g/t of JT2000 were sequentially added. After the copper scavenging 13, a copper flotation tailing 14 was produced. Middlings produced in the copper flotation operation were returned to a previous operation.
[92] The copper flotation tailing 14 was subjected to screening 16 by using a Tyler standard sieve with a mesh size of 0.026 mm to obtain and oversize product 17 and a final tailing 18. The oversize product 17 was subjected to second pulping 19. In the second pulping 19, water was added to obtain an ore pulp with a mass concentration of 16.36%, and stirring was maintained for 5.5 min. After the second pulping, the ore pulp was subjected to mica roughing 20. In the mica roughing 20, 300 g/t of Na 2 CO 3 and 100 g/t of NaOH were added to adjust the pH of the ore pulp to 10.5, and then 1,500 g/t of sodium silicate, 500 g/t of sodium hexametaphosphate, 150 g/t of sodium oleate, g/t of octadecylamine, 100 g/t of dodecylamine and 20 g/t of JT2000 were sequentially added. After the mica roughing 20, first mica cleaning 21, third mica cleaning 23 and fifth mica cleaning were performed without adding a reagent, that is, blank cleaning. In the second mica cleaning 22, 200 g/t of sodium silicate and 15 g/t of JT2000 were sequentially added. In the fourth mica cleaning 24, 100 g/t of sodium silicate and 10 g/t of JT2000 were sequentially added. A froth product, namely a mica concentrate 36, was obtained in the fifth mica cleaning 25. An underflow 27 obtained in the mica roughing 20 was subjected to mica scavenging 34. In the mica scavenging 34, 500 g/t of sodium silicate, 75 g/t of sodium oleate and 50 g/t of dodecylamine were sequentially added. A mica scavenging tailing 35 was produced in the mica scavenging 34. A first mica cleaning middling 28, a second mica cleaning middling 29, a third mica cleaning middling 30, a fourth mica cleaning middling 31, a fifth mica cleaning middling 32 and a mica scavenging middling 33 were combined and then subjected to the screening 16. The mica scavenging tailing 35 was combined into the final tailing 18.
[93] Example 2
[94] Example 2 is the same as Example 1 except for the following differences.
[95] In the first pulping 2, the ore pulp obtained had a mass concentration of 34.31%, and the stirring was maintained for 9.5 min. In the copper roughing 3, 30 g/t of MOS-2 and 25 g/t of MA-1 were added. In the copper scavenging 13, 15 g/t of MOS-2 and 12 g/t of MA-1 were added. In the second pulping 19, the ore pulp obtained had a mass concentration of 19.62%, and the stirring was maintained for 6.0 min. In the mica roughing 20, 400 g/t of Na 2 CO 3 and 120 g/t of NaOH were added to adjust the pH of the ore pulp to 11, and then 1,800 g/t of sodium silicate, 700 g/t of sodium hexametaphosphate, 200 g/t of sodium oleate, 50 g/t of octadecylamine and 120 g/t of dodecylamine were sequentially added. In the second mica cleaning 22, 300 g/t of sodium silicate was added. In the fourth mica cleaning 24, 200 g/t of sodium silicate was added. In the mica scavenging 34, 600 g/t of sodium silicate, 100 g/t of sodium oleate and 60 g/t of dodecylamine were added.
[96] Table 1: Process indexes in Examples 1 to 2
[971 Copper concentrate Mica concentrate .Musco Total Copper Copper Copper Mica vite Biotite mica Mica yield grade recovery rate yield content content content recovery rate /% /% /% / % /% /%
Tungsten 100 0.11 100 100 21.22 8.64 29.86 100 beneficiation tailing Example 1 0.296 21.15 56.91 13.291 74.27 22.08 96.35 42.89 Example 2 0.315 20.36 58.30 14.145 73.36 21.68 95.04 45.02
[98] Table 2: Screening analysis of mica concentrate in Examples 1 to 2
[99] Example 1 Example 2 Particle size /mm Undersize Undersize Proportion/0/% proportion //% Proportion/0 prpoon0 proportion /% >0.075 23.12 100 23.35 100 0.075~0.045 21.25 76.88 21.92 76.65 0.045~0.038 9.46 55.63 9.53 54.73 0.038~0.032 3.48 46.17 3.27 45.2 0.032~0.028 9.03 42.69 8.56 41.93 <0.028 33.66 33.66 33.37 33.37 Total 100 100
[100] In summary, the two examples show that the process of the present disclosure is advanced, and features desired separation indexes, high recovery rate and stable operation. It realizes the recovery of copper and mica minerals in the ultra-fine tungsten beneficiation tailing, and improves the comprehensive recovery efficiency of resources.
[101] In the specification, the description of "one embodiment", "some embodiments", "an example", "a specific example" and "some examples" means that a specific feature, structure, material or characteristic described in combination with the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. In this specification, the schematic description of the above terms is unnecessarily against the same embodiment or example.
Moreover, the described specific feature, structure, material, or characteristic may be combined in any suitable manner in any one or more embodiments or examples. In addition, a person skilled in the art may combine different embodiments or examples described in this specification and features of the different embodiments or examples without any contradiction.
[102] Although the embodiments of the present disclosure have been illustrated and described, it should be understood that the embodiments are examples instead of limitations to the present disclosure. Persons of ordinary skill in the art may make various changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present disclosure.
[103] In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
[104] It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
Claims (5)
1. A method for recovering copper and mica minerals from a tungsten beneficiation tailing, comprising following steps: (1) mixing the tungsten beneficiation tailing with water for first pulping to obtain a first ore pulp with a concentration of 30-35wt%; (2) mixing the first ore pulp with MOS-2, MA-1 and JT2000 for copper roughing to obtain a copper roughing concentrate and a copper roughing underflow; (3) subjecting the copper roughing concentrate to copper cleaning to obtain a copper concentrate and a copper cleaning middling; (4) mixing the copper roughing underflow with MOS-2, MA-1 and JT2000 for copper scavenging to obtain a copper flotation tailing and a copper scavenging middling; (5) subjecting the copper flotation tailing to screening to obtain an oversize product and a final tailing; (6) mixing the oversize product with water for second pulping to obtain a second ore pulp with a concentration of 16-20wt%; (7) adjusting a pH of the second ore pulp, and then mixing the second ore pulp with sodium silicate, sodium hexametaphosphate, sodium oleate, octadecylamine, dodecylamine and JT2000 for mica roughing to obtain a mica roughing concentrate and a mica roughing underflow; (8) subjecting the mica roughing concentrate to mica cleaning to obtain a mica concentrate and a mica cleaning middling; and (9) mixing the mica roughing underflow with sodium silicate, sodium oleate and dodecylamine for mica scavenging to obtain a mica scavenging middling and a mica scavenging tailing.
2. The method according to claim 1, wherein in step (1), in the tungsten beneficiation tailing, -0.075 mm particles account for > 80%, -0.038 mm particles account for > 50%, and -0.028 mm particles account for > 45 %; wherein in step (2), 25-30 g of MOS-2, 20-25 g of MA-1 and 20 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing; wherein step (3) comprises: (3-1) subjecting the copper roughing concentrate to first copper cleaning to obtain a first copper cleaning froth product and a first copper cleaning middling, and subjecting the first copper cleaning middling to the copper roughing in step (2); (3-2) subjecting the first copper cleaning froth product to second copper cleaning to obtain a second copper cleaning froth product and a second copper cleaning middling, and subjecting the second copper cleaning middling to the first copper cleaning in step (3-1); and
(3-3) subjecting the second copper cleaning froth product to third copper cleaning to obtain a copper concentrate and a third copper cleaning middling, and subjecting the third copper cleaning middling to the second copper cleaning in step (3-2); wherein in step (4), 12-15 g of MOS-2, 10-12 g of MA-1 and 10 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing; optionally, in step (4), the copper scavenging middling is subjected to the copper roughing in step (2); wherein in step (5), the sieve used for the screening has a mesh size of 0.026 mm; wherein in step (7), the pH of the second ore pulp is adjusted to 10.5-11 by sodium carbonate and sodium hydroxide. optionally, 300-400 g of sodium carbonate and 100-120 g of sodium hydroxide are added based on 1 t of dry tungsten beneficiation tailing; wherein in step (7), 1,500-1,800 g of sodium silicate, 500-700 g of sodium hexametaphosphate, 150-200 g of sodium oleate, 30-50 g of octadecylamine, 100-120 g of dodecylamine and 20 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing.
3. The method according to claim 1, wherein step (8) comprises: (8-1) subjecting the mica roughing concentrate to first mica cleaning to obtain a first mica cleaning froth product and a first mica cleaning middling; (8-2) mixing the first mica cleaning froth product with sodium silicate and JT2000 for second mica cleaning to obtain a second mica cleaning froth product and a second mica cleaning middling; (8-3) subjecting the second mica cleaning froth product to third mica cleaning to obtain a third mica cleaning froth product and a third mica cleaning middling; (8-4) mixing the third mica cleaning froth product with sodium silicate and JT2000 for fourth mica cleaning to obtain a fourth mica cleaning froth product and a fourth mica cleaning middling; and (8-5) subjecting the fourth mica cleaning froth product to fifth mica cleaning to obtain a mica concentrate and a fifth mica cleaning middling; optionally, in step (8-2), 200-300 g of sodium silicate and 15 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing; optionally, in step (8-4), 100-200 g of sodium silicate and 10 g of JT2000 are added based on 1 t of dry tungsten beneficiation tailing; wherein the method further comprises: (10) combining the first mica cleaning middling, the second mica cleaning middling, the third mica cleaning middling, the fourth mica cleaning middling, the fifth mica cleaning middling and the mica scavenging middling, and then subjecting the combined middlings to the screening in step (5).
4. The method according to claim 1, wherein in step (9), 500-600 g of sodium silicate, 75-100 g of sodium oleate and 50-60 g of dodecylamine are added based on 1 t of dry tungsten beneficiation tailing.
5. The method according to claim 1, wherein the method further comprises: (11) combining the mica scavenging tailing obtained in step (9) into the final tailing obtained in step (5).
FIG. 1 Sheet 1/3
Sheet 2/3 08 Jun 2021 2021103197
FIG. 2
FIG. 3
Sheet 3/3 08 Jun 2021 2021103197
FIG. 4
FIG. 5
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