CN113262876A - Beneficiation method for recovering wolframite from tailings - Google Patents
Beneficiation method for recovering wolframite from tailings Download PDFInfo
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- CN113262876A CN113262876A CN202110382292.XA CN202110382292A CN113262876A CN 113262876 A CN113262876 A CN 113262876A CN 202110382292 A CN202110382292 A CN 202110382292A CN 113262876 A CN113262876 A CN 113262876A
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- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/002—High gradient magnetic separation
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- 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
Abstract
The invention belongs to the field of mineral separation, and relates to a mineral separation method for recovering wolframite and wolframite from tailings, which comprises the following steps of (1) removing sulfide by flotation; (2) performing low-intensity magnetic separation to remove magnetic impurities; (3) separating the wolframite and the scheelite by high-gradient magnetic separation and shunting; (4) carrying out normal-temperature flotation on scheelite; (5) and (4) recovering the wolframite through a combined gravity separation-flotation process. The method divides the wolframite and the scheelite in the tailings after the desulfurization and the deironing by high-gradient magnetic separation, sets different process conditions according to different separation characteristics of the wolframite and the scheelite, and improves the separation indexes of the wolframite and the scheelite. The method is based on the differences of the properties and the separation characteristics of the scheelite and the wolframite, focuses on the aspects of desulfurization and deironing, high-gradient magnetic separation and shunt, scheelite normal-temperature flotation and wolframite gravity-magnetic combined recovery, realizes the high-efficiency recovery of the scheelite and the wolframite in the tailings, is an environment-friendly, high-efficiency and energy-saving beneficiation method, and is suitable for popularization and application.
Description
Technical Field
The invention belongs to the field of beneficiation, and particularly relates to a beneficiation method for efficiently recycling wolframite and scheelite from tailings.
Background
More than 20 tungsten-containing minerals are found in nature, but only wolframite [ (Fe, Mn) WO) with industrial exploitation value4]And scheelite (CaWO)4). Although the tungsten resource reserves in China are considerable, a large amount of tungsten is lost due to the properties of tungsten and the problems in the sorting process. Therefore, the development of efficient equipment and a new tungsten selecting process and the recovery of tungsten resources from tailings have very important theoretical and practical significance.
The wolframite and scheelite have great differences in properties and sorting characteristics, the wolframite has high density, is fragile and easy to over-crush, and is mainly recovered by a gravity separation method, but the recovery of tungsten in fine mud is commonly carried out by a flotation method. The scheelite has good floatability and is mainly recovered by a flotation process, usually by the petronov method or the room temperature flotation method. The mixed wolframite and scheelite ore usually adopts a method of mixed flotation and heating, concentrating and separating of mixed concentrate, but the medicament dosage is large, the concentrate quantity needing heating is large, the energy consumption is high, and the floatability of the wolframite is reduced and the flotation recovery rate is low because the wolframite is subjected to the processes of mixed flotation, heating inhibition and reactivation flotation of the wolframite and the scheelite ore. Therefore, in order to improve the recovery index of the wolframite, a mineral separation process which can reduce energy consumption, reduce the influence on the floatability of the wolframite, improve the recovery rate of the wolframite and improve the separation effect is needed, and the high-efficiency recovery of the wolframite from tailings is realized.
Disclosure of Invention
The invention aims to provide a green and environment-friendly beneficiation method which is efficient and stable and has good separation index and low production cost, and black and white tungsten is efficiently recovered from tailings.
The invention is realized in this way, a mineral processing method for recovering wolframite from tailings, which comprises the following steps:
(1) removing sulfide by flotation: grinding and pulping the tailings containing the wolframium nigrum, and adding the butyl xanthate and the ammonium nitrate black powder according to the weight ratio of 2:1, wherein the dosage is 60 g/t-80 g/t; adding kerosene with the dosage of 10 g/t-30 g/t; adding 2#The amount of the oil is 10 g/t-20 g/t;adopting a second rough sweeping flow to obtain flotation sulfide (tailings 2) and sulfide flotation tailings;
(2) performing low-intensity magnetic separation to remove magnetic impurities: carrying out low-intensity magnetic separation on the sulfide flotation tailings obtained in the step (1) to remove magnetic impurities, wherein the magnetic induction intensity is 3000Gs, and obtaining the magnetic impurities and the low-intensity magnetic separation tailings;
(3) separating the wolframite by high-gradient magnetic separation shunting: and (3) carrying out shunting separation on the wolframite and the scheelite by adopting a high-gradient magnetic separation method on the low-intensity magnetic separation tailings obtained in the step (2), and obtaining high-gradient magnetic separation concentrate and high-gradient magnetic separation tailings by adopting a primary coarse-fine process flow. The high-gradient magnetic separation concentrate mainly comprises wolframite, and the high-gradient magnetic separation tailings mainly comprise scheelite and fluorite. After strong magnetic separation with the magnetic field intensity of 1.0T, the yield of the magnetic separation wolframite is higher, the content of fine mud is reduced, and 51.35 percent of WO in the tailings subjected to weak magnetic separation is348.65% of WO distributed in a magnetic product for high-gradient magnetic separation3Distributed in the non-magnetic product;
(4) normal-temperature flotation of scheelite: and (3) performing scheelite flotation on the high-gradient magnetic separation tailings (non-magnetic products) obtained in the step (3), wherein the scheelite flotation comprises scheelite roughing and scheelite normal-temperature fine separation, and the scheelite roughing adopts a flotation process of one-roughing and two-fine-sweeping to obtain scheelite rough concentrate and roughing tailings. White tungsten normal-temperature concentration is carried out on white tungsten rough concentrate obtained by the white tungsten rough concentration, and a flotation process of one-rough four-fine two-sweep is adopted to obtain white tungsten concentrate and concentrated tailings;
(5) recovering wolframite through a gravity separation-flotation combined process: and (4) carrying out wolframite recovery on the high-gradient magnetic concentrate (magnetic product) obtained in the step (3), wherein the wolframite recovery comprises table reselection and wolframite flotation. Reselecting by a table concentrator to obtain reselected concentrate and reselected tailings; reselecting tailings to perform wolframite flotation, adding Na into a flotation reagent2CO3、Na2SiF6、Na2SiO3、Al2(SO4)3、Pb(NO3)2And TW-705, adopting a flotation process of one-coarse-four-fine-two-sweep to obtain black tungsten flotation concentrate and black tungsten flotation tailings.
The invention has the characteristics that:
(1) the high-gradient strong magnetic separation enables more than 80% of the black tungsten minerals to enter a magnetic separation concentrate product, the scheelite is mainly in magnetic separation tailings, and the black tungsten minerals and the scheelite minerals are basically separated, so that conditions are created for subsequent recovery.
(2) The mineral composition of the ore slurry flows on the two sides after the strong magnetic shunt is simplified, the adaptability to the ore is strong, different process conditions are formulated according to different separation characteristics of the wolframite and the scheelite when the wolframite and the scheelite are respectively floated and recovered, so that the separation indexes of the wolframite and the scheelite are favorably improved, the influence of the fluctuation of the ratio of the wolframite and the scheelite can be avoided, the mineral separation interference factors are relatively reduced, and the product quality can be improved.
(3) After high-gradient magnetic separation and flow division, separation processes are independently formulated for the wolframite and the scheelite according to respective characteristics, the scheelite is separated without heating and concentrating the wolframite bulk concentrate, the scheelite is floated at normal temperature, and the energy consumption and the medicament dosage can be reduced.
(4) And the wolframite is recovered by adopting a gravity separation-flotation combined process after the flow is divided, so that the yield of the wolframite flotation pulp is reduced, the total consumption of the flotation collecting agent is reduced, and the medicament cost is reduced. The wolframite is not heated, so that the problem of low wolframite recovery rate caused by the activation floating, the heating flotation inhibition and the activation floating of the wolframite is solved, the wolframite beneficiation index is improved, and the comprehensive total recovery rate of the wolframite is also improved.
Drawings
FIG. 1 is a process flow diagram.
Detailed Description
Grinding and pulping the tailings containing the wolframium nigrum, adding butyl xanthate, ammonium nitrate black powder and No. 2 oil, and performing flotation to remove sulfides by adopting a two-rough-scanning flow; carrying out low-intensity magnetic separation on the sulfide flotation tailings to remove magnetic impurities; carrying out high-gradient magnetic separation and shunting separation on the low-intensity magnetic separation tailings, and obtaining high-gradient magnetic separation concentrate and high-gradient magnetic separation tailings by adopting a primary coarse-primary fine process flow; carrying out wolframite recovery research on the high-gradient magnetic separation concentrate (magnetic product), wherein the research comprises table reselection and wolframite flotation, the table reselection is used for obtaining gravity separation concentrate, the gravity separation tailings are used for wolframite flotation, a flotation process of one-rough four-fine two-sweep is adopted for obtaining wolframite flotation concentrate, and the wolframite gravity separation concentrate and the flotation concentrate are combined into the wolframite concentrate; and (3) carrying out white tungsten flotation on the high-gradient magnetic separation tailings (non-magnetic products), wherein the white tungsten flotation comprises white tungsten roughing and white tungsten normal-temperature fine separation, the white tungsten roughing adopts a one-roughing two-fine two-sweep flotation process to obtain white tungsten rough concentrate, and the white tungsten rough concentrate adopts a one-roughing four-fine two-sweep flotation process to carry out white tungsten normal-temperature fine separation to obtain white tungsten concentrate.
Example 1
WO is contained in tailings of certain tungsten ore in Jiangxi Ganzhou30.26 percent of the tailings, wherein the tailings with the thickness of-0.074 mm accounts for 82 percent, the ratio of the wolframite to the scheelite is 6:4, the main minerals comprise the wolframite, the scheelite, the chalcopyrite, the pyrite, the feldspar, the quartz, the mica and the like, and the wolframite containing WO can be obtained by adopting the process of' flotation and sulfide removal, weak magnetic impurity removal, high gradient magnetic separation, normal temperature flotation and scheelite recovery by combining the process flow342.45 percent of scheelite concentrate with the recovery rate of 29.39 percent; containing WO3 34.42％， WO3Reselecting wolframite concentrate with the recovery rate of 14.56 percent; containing WO3 28.32％，WO3Flotation black tungsten concentrate with the recovery rate of 17.43 percent; the black tungsten gravity concentrate and the flotation concentrate are combined into a final black tungsten concentrate, the grade of the black tungsten concentrate is 30.81%, and the recovery rate is 31.99%; the process treats the tailings to finally obtain WO3The recovery rate is 61.38 percent of tungsten concentrate, and tungsten resources in tailings are better recovered. The results of example 1 are shown in Table 1.
Table 1 beneficiation results of example 1
| Name (R) | Yield% | Grade% | The recovery rate is high |
| Flotation of sulphide ores | 7.72 | 0.15 | 4.45 |
| Magnetic impurities | 11.56 | 0.13 | 5.78 |
| Scheelite roughing tailings | 75.73 | 0.04 | 11.94 |
| Scheelite concentration tailings | 3.21 | 0.86 | 10.62 |
| Black tungsten flotation tailings | 1.33 | 1.14 | 5.83 |
| Scheelite concentrate | 0.18 | 42.45 | 29.39 |
| Gravity concentration of wolframite concentrate | 0.11 | 34.42 | 14.56 |
| Flotation of black tungsten concentrate | 0.16 | 28.32 | 17.43 |
| Wolframite concentrate | 0.27 | 30.81 | 31.99 |
| Raw ore | 100.00 | 0.26 | 100.00 |
Example 2
WO is contained in tailings of certain tungsten ore in Jiangxi Ganzhou30.29 percent, 85 percent of-0.074 mm in the tailings, 4:6 of wolframite and scheelite, the main minerals of the wolframite, the scheelite, the chalcopyrite, the pyrite, the feldspar, the quartz, the mica and the like are contained, and the wolframite containing WO can be obtained by adopting the process of' flotation and sulfide removal, weak magnetic impurity removal, high gradient magnetic separation, normal temperature flotation and scheelite recovery by combined process of heavy flotation341.19 percent of scheelite concentrate with the recovery rate of 26.99 percent; containing WO3 35.47％， WO3Reselecting the wolframite concentrate with the recovery rate of 15.90 percent; containing WO3 27.89％，WO3Flotation black tungsten concentrate with the recovery rate of 13.46 percent; the black tungsten gravity concentrate and the flotation concentrate are combined into a final black tungsten concentrate, the grade of the black tungsten concentrate is 31.54%, and the recovery rate is 29.34%; the process treats the tailings to finally obtain WO3The recovery rate is 56.35% tungsten concentrate, and the tungsten resource in the tailings is better recovered. The results of example 2 are shown in Table 2.
Table 2 beneficiation results of example 2
| Name (R) | Yield% | Grade% | The recovery rate is high |
| Flotation of sulphide ores | 11.22 | 0.16 | 6.19 |
| Magnetic impurities | 6.45 | 0.13 | 2.89 |
| Scheelite roughing tailings | 77.41 | 0.06 | 16.02 |
| Scheelite concentration tailings | 3.13 | 0.95 | 10.25 |
| Black tungsten flotation tailings | 1.33 | 1.81 | 8.30 |
| Scheelite concentrate | 0.19 | 41.19 | 26.99 |
| Gravity concentration of wolframite concentrate | 0.13 | 35.47 | 15.90 |
| Flotation of black tungsten concentrate | 0.14 | 27.89 | 13.46 |
| Wolframite concentrate | 0.27 | 31.54 | 29.36 |
| Raw ore | 100.00 | 0.29 | 100.00 |
Claims (3)
1. A beneficiation method for recovering wolframite from tailings is characterized by comprising the following steps:
(1) removing sulfide by flotation: grinding and pulping the tailings containing the wolframium nigrum, and adding the butyl xanthate and the ammonium nitrate black powder according to the weight ratio of 2:1, wherein the dosage is 80 g/t-100 g/t; adding kerosene with the dosage of 20 g/t-30 g/t; adding 2#The amount of the oil is 10 g/t-20 g/t; obtaining flotation sulfides and sulfide flotation tailings by adopting a two-rough-one-sweep process;
(2) performing low-intensity magnetic separation to remove magnetic impurities: carrying out low-intensity magnetic separation on the sulfide flotation tailings obtained in the step (1) to remove magnetic impurities, wherein the magnetic induction intensity is 3000Gs, and obtaining the magnetic impurities and the low-intensity magnetic separation tailings;
(3) separating the wolframite by high-gradient magnetic separation shunting: carrying out shunting separation on the wolframite and the scheelite by adopting a high-gradient magnetic separation method on the low-intensity magnetic separation tailings obtained in the step (2), and obtaining high-gradient magnetic separation concentrate and high-gradient magnetic separation tailings by adopting a primary coarse-fine process flow; the high-gradient magnetic separation concentrate mainly comprises wolframite, and the high-gradient magnetic separation tailings mainly comprise scheelite and fluorite;
(4) normal-temperature flotation of scheelite: performing scheelite flotation on the high-gradient magnetic separation tailings (non-magnetic products) obtained in the step (3), wherein the scheelite flotation comprises scheelite roughing and scheelite normal-temperature fine separation, and the scheelite roughing adopts a flotation process of primary roughing and secondary cleaning to obtain scheelite rough concentrate and roughing tailings; white tungsten normal-temperature concentration is carried out on white tungsten rough concentrate obtained by the white tungsten rough concentration, and a flotation process of one-rough four-fine two-sweep is adopted to obtain white tungsten concentrate and concentrated tailings;
(5) recovering wolframite through a gravity separation-flotation combined process: recycling wolframite from the high-gradient magnetic concentrate (magnetic product) obtained in the step (3), wherein the recycling comprises table reselection and wolframite flotation; reselecting by a table concentrator to obtain reselected concentrate and reselected tailings; reselecting tailings to perform wolframite flotation, adding Na into a flotation reagent2CO3、Na2SiF6、Na2SiO3、Al2(SO4)3、Pb(NO3)2And TW-705, adopting a flotation process of one-coarse-four-fine-two-sweep to obtain black tungsten flotation concentrate and black tungsten flotation tailings.
2. A beneficiation method for recovering wolframite and scheelite from tailings according to claim 1, wherein the raw ore comprises tailings of wolframite and scheelite, and the raw ore comprises WO30.26-0.30% of wolframite, the ratio of the wolframite to the scheelite is 6: 4-7: 3, and the main minerals comprise wolframite, scheelite, chalcopyrite, pyrite, feldspar, quartz, mica and the like.
3. A beneficiation method for recovering wolframite from tailings according to claim 1, wherein the TW-705 added in the step (5) of gravity separation of tailings for wolframite flotation is benzohydroxamic acid as a collector for the wolframite flotation.
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Citations (6)
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| DE3517154A1 (en) * | 1985-05-11 | 1986-11-13 | Henkel KGaA, 4000 Düsseldorf | USE OF SURFACTANT MIXTURES AS AUXILIARIES FOR THE FLOTATION OF NON-SULFIDIC ORES |
| CN101869876A (en) * | 2010-05-24 | 2010-10-27 | 广州有色金属研究院 | Ore dressing method of low-grade scheelite |
| CN102211053A (en) * | 2011-05-27 | 2011-10-12 | 广州有色金属研究院 | Method for separating black and white tungsten bulk flotation rough concentrates |
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| CN105327783A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Low-grade scheelite branch floating method |
| CN106669964A (en) * | 2016-05-24 | 2017-05-17 | 江西理工大学 | Mineral separation method for recycling wolframite from tailing |
-
2021
- 2021-04-09 CN CN202110382292.XA patent/CN113262876A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3517154A1 (en) * | 1985-05-11 | 1986-11-13 | Henkel KGaA, 4000 Düsseldorf | USE OF SURFACTANT MIXTURES AS AUXILIARIES FOR THE FLOTATION OF NON-SULFIDIC ORES |
| CN101869876A (en) * | 2010-05-24 | 2010-10-27 | 广州有色金属研究院 | Ore dressing method of low-grade scheelite |
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| CN104475340A (en) * | 2015-01-04 | 2015-04-01 | 湖南有色金属研究院 | Method for increasing fine-grained wolframite ore dressing recovery ratio |
| CN105327783A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Low-grade scheelite branch floating method |
| CN106669964A (en) * | 2016-05-24 | 2017-05-17 | 江西理工大学 | Mineral separation method for recycling wolframite from tailing |
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Application publication date: 20210817 |