CN115888971A - Method for promoting gravity separation in beneficiation of tin polymetallic sulphide ore - Google Patents
Method for promoting gravity separation in beneficiation of tin polymetallic sulphide ore Download PDFInfo
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- CN115888971A CN115888971A CN202211683624.9A CN202211683624A CN115888971A CN 115888971 A CN115888971 A CN 115888971A CN 202211683624 A CN202211683624 A CN 202211683624A CN 115888971 A CN115888971 A CN 115888971A
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- gravity separation
- cassiterite
- tin
- beneficiation
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- 238000000926 separation method Methods 0.000 title claims abstract description 35
- 230000005484 gravity Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 27
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 21
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 230000001737 promoting effect Effects 0.000 title claims abstract description 7
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 66
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 21
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims abstract description 20
- 229910001626 barium chloride Inorganic materials 0.000 claims abstract description 20
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 12
- 230000023556 desulfurization Effects 0.000 claims abstract description 12
- 239000012141 concentrate Substances 0.000 claims abstract description 10
- 239000003814 drug Substances 0.000 claims abstract description 6
- 238000005188 flotation Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910052976 metal sulfide Inorganic materials 0.000 claims description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052683 pyrite Inorganic materials 0.000 description 6
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 6
- 239000011028 pyrite Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052949 galena Inorganic materials 0.000 description 3
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 3
- 238000005456 ore beneficiation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229910052950 sphalerite Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052951 chalcopyrite Inorganic materials 0.000 description 2
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241001584775 Tunga penetrans Species 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910052964 arsenopyrite Inorganic materials 0.000 description 1
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 229910001422 barium ion Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for promoting gravity separation in beneficiation of tin polymetallic sulphide ores, and relates to the technical field of beneficiation of tin ores. Barium chloride and sodium carbonate are prepared into solutions with concentration ranges of 1-3% and 5-10% respectively; introducing the cassiterite pulp to be selected after flotation and desulfurization into a first stirring barrel, adding the prepared barium chloride solution, and stirring at the speed of 450-600 r/min for 10-15 min; introducing the ore pulp reacted with the medicament into a second stirring barrel, adding the prepared sodium carbonate solution, and stirring at the speed of 300-400 r/min for 5-10 min; and carrying out gravity separation operation on the ore pulp to finally obtain tin concentrate. According to the method, the desulfurized cassiterite pulp to be selected fully reacts with the barium chloride solution and the sodium carbonate solution respectively by utilizing the solubility product difference and mutual transformation among different materials, so that slightly soluble calcium sulfate species existing in the pulp are removed, the surface scaling phenomenon of gravity separation equipment is reduced, the loosening-layering-separation process of the cassiterite in subsequent gravity separation is improved, and the cassiterite separation index is effectively improved.
Description
Technical Field
The invention relates to the technical field of tin ore beneficiation, in particular to a method for promoting gravity separation in tin polymetallic sulfide ore beneficiation.
Background
Cassiterite has the molecular formula SnO 2 The Sn content is 78.8% theoretically, and is an important mineral raw material for industrial production of tin. Since cassiterite has a high specific gravity of 6.8 to 7, gravity separation based on gravity difference is the main method for recovering cassiterite. The cassiterite gravity separation equipment mainly comprises a shaking table, a spiral chute, a jigger, a centrifugal concentrator and the like. Among them, in the mine production practice, because the shaking table has a high enrichment ratio, the shaking table is the most widely used cassiterite gravity separation equipment.
The sorting process of the minerals in the shaking table is determined by the variety of the bed strips, the transverse water flow and the asymmetrical reciprocating motion of the bed surface. The sorting process is roughly as follows: firstly, the asymmetric reciprocating motion of the bed surface loosens minerals, and then the light minerals and the heavy minerals are layered mutually due to the hydraulic jump action when the minerals pass through the bed surface and the bed bars. In addition, under the combined action of the asymmetric reciprocating motion of the bed strips and the bed surface, ascending and descending water flows are formed between the adjacent bed strips, minerals are continuously loosened, the minerals with light specific gravity are conveyed from the bottom layer to the upper layer and finally flow to the tailing end under the action of the transverse water flows, and the heavy minerals move to the concentrate end along the grooves between the bed strips under the protection of the bed strips.
Cassiterite is often associated with other minerals such as chalcopyrite, galena, sphalerite, pyrite, arsenopyrite and other metal sulfides. Therefore, before the cassiterite is sorted, the sulfide ores need to be sorted. In the process of sorting sulfide ores, sorting is generally performed according to the sequence of chalcopyrite, galena, sphalerite and pyrite, in order to inhibit pyrite, the most common method in production is to add lime, the pH value of ore pulp is increased by adding lime, pyrite is effectively inhibited, and when the content of pyrite in the ore is high, the using amount of lime is increased, so that a large amount of calcium ions exist in the ore pulp; secondly, in order to improve the comprehensive utilization rate of resources, the galena, the sphalerite and the pyrite need to be activated after being inhibited, and the copper sulfate is the most effective and widely applied activator for the sulfide ores. Although the addition of large amounts of lime and copper sulfate achieves effective separation of the sulfide ore, this also results in a large amount of sulfate, calcium ions, and slightly soluble calcium sulfate remaining in the cassiterite beneficiated pulp. When the desulfurization tailings enter the cassiterite table for gravity separation, slightly soluble calcium sulfate in the ore pulp can deposit and scale on the grooves among the bed strips of the table surface of the table and the table surface, so that the grooves among the bed strips are blocked, the original structure of the table surface is damaged, and the cassiterite cannot be effectively separated. In the field production, in order to remove the scale on the bed surface, the feeding of ore to clean the bed surface needs to be stopped irregularly, and some tables even need to be replaced by new tables, which brings great inconvenience to the field production management.
Disclosure of Invention
The invention aims to provide a method for promoting gravity separation in beneficiation of tin polymetallic sulphide ores, and solves the problem that residual sulfate radicals and calcium are easy to cause scaling of gravity separation equipment, so that the index of gravity separation of cassiterite is low.
In order to solve the technical problem, the invention adopts the following technical scheme: a method for promoting gravity separation in tin polymetallic sulphide ore beneficiation is characterized by comprising the following steps:
s1, preparing solutions with the concentration ranges of 1% -3% and 5% -10% from barium chloride and sodium carbonate respectively; the concentration of the sodium carbonate is greater than that of the barium chloride, so that calcium and magnesium ions in the ore pulp and residual barium ions at the front end are precipitated, the sodium carbonate can also eliminate the influence of slime on the gravity separation of the cassiterite, and the cassiterite separation index is improved.
S2, introducing the cassiterite pulp to be selected after flotation and desulfurization into a first stirring barrel, adding the barium chloride solution prepared in the S1, and stirring at the speed of 450-600 r/min for 10-15 min; through long-time high-intensity stirring, the slightly soluble calcium sulfate can be converted into barium sulfate sediment with smaller solubility product.
S3, introducing the ore pulp reacted with the medicament in the step S2 into a second stirring barrel, adding the sodium carbonate solution prepared in the step S1, and stirring at the speed of 300-400 r/min for 5-10 min; the precipitation of calcium and magnesium ions in the ore pulp is strengthened and the influence of gravity separation of the slime into cassiterite is eliminated.
And S4, performing gravity separation on the ore pulp in the S3 to obtain tin concentrate finally.
A further technical scheme is that after the barium chloride solution is added in the step S2, the sulfate radical content in the ore pulp after reaction is controlled to be less than 150mg/L.
The further technical scheme is that after the sodium carbonate solution is added in the step S3, the pH value of ore pulp in the second stirring barrel after reaction is controlled to be 8-9.
Still further, the gravity separation device comprises a shaker and a spiral chute.
The reaction principle is as follows: the above process involves the reaction formula
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the method, the desulfurized cassiterite pulp to be selected fully reacts with the barium chloride solution and the sodium carbonate solution respectively by utilizing the solubility product difference and mutual transformation among different materials, so that slightly soluble calcium sulfate species existing in the pulp are removed, the surface scaling phenomenon of gravity separation equipment is reduced, the loosening-layering-separation process of the cassiterite in subsequent gravity separation is improved, and the cassiterite separation index is effectively improved;
(2) The invention can protect the bed strips on the surface of the cassiterite gravity separation equipment, reduce the scaling phenomenon of the bed surface, greatly reduce the working strength of field operators, prolong the service life of the equipment, ensure the production stability and be beneficial to field production management;
(3) The method provided by the invention is simple to operate and wide in application range.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The method takes the desulfurization tailings of a certain cassiterite in Yunnan as a sample of the embodiment, the narrower the size fraction range is, the better the cassiterite reselection index effect is, the cassiterite with the size of +0.074mm is treated by the embodiment to be used as a sample of the ore, the Sn content in the sample of the ore is 1.12 percent, and the method specifically comprises the following operation steps:
s1, placing barium chloride and sodium carbonate in a stirring barrel, wherein the preparation concentrations are 1% and 5%, respectively, and the concentration of the sodium carbonate is greater than that of the barium chloride;
s2, introducing the cassiterite ore pulp subjected to flotation and desulfurization into a first stirring barrel, adding the barium chloride solution prepared in the step S1, stirring at the speed of 450r/min for 10min, and reacting to obtain the cassiterite ore pulp with the sulfate radical content of less than 150mg/L.
S3, introducing the ore pulp which reacts with the medicament in the step S2 into a second stirring barrel, and adding the sodium carbonate solution prepared in the step S1 to ensure that the pH value of the ore pulp in the stirring barrel is 8, the stirring speed is 300r/min, and the stirring time is 5min;
and S4, introducing the ore pulp in the step S3 into a shaking table for gravity separation operation, wherein the feeding concentration of the shaking table is 20%, the gradient of a bed surface is 2 degrees, and tin concentrate and tailings are obtained after one shaking table operation.
After the method provided by the invention is adopted, the tin concentrate with the Sn grade of 59.68% and the Sn recovery rate of 61.28% is obtained.
Example 2
The method takes the desulfurization tailings of the tin polymetallic sulfide ore in Guangxi province as the ore sample of the embodiment, after desulfurization operation, the proportion of-0.074 mm in the ore sample is 79.62%, and the content of Sn is 0.35%, and specifically comprises the following operation steps:
s1, placing barium chloride and sodium carbonate in a stirring barrel, wherein the preparation concentrations are respectively 2% and 8%, and the concentration of the sodium carbonate is greater than that of the barium chloride;
s2, introducing the cassiterite ore pulp to be selected after the flotation and the desulfurization into a first stirring barrel, adding the barium chloride solution prepared in the step S1, stirring at the speed of 500r/min for 12min, and reacting to obtain the cassiterite ore pulp with the sulfate radical content of less than 150mg/L.
S3, introducing the ore pulp which reacts with the medicament in the step S2 into a second stirring barrel, and adding the sodium carbonate solution prepared in the step S1 to ensure that the pH value of the ore pulp in the stirring barrel is 8.5, the stirring speed is 350r/min, and the stirring time is 9min;
and S4, introducing the ore pulp in the step S3 into a shaking table for reselection operation, wherein the feeding concentration of the shaking table is 18 percent, the gradient of a bed surface is 2 degrees, and obtaining tin concentrate and tailings after one shaking table operation.
After the method provided by the invention is adopted, the tin concentrate with the Sn grade of 36.28% and the Sn recovery rate of 67.38% is obtained.
Example 3
The desulfurization tailings of the tin polymetallic sulfide ore of inner Mongolia are used as the ore sample of the embodiment, after desulfurization operation, the proportion of-0.074 mm in the ore sample is 75.64%, and the content of Sn is 0.89%, and the method specifically comprises the following operation steps:
s1, placing barium chloride and sodium carbonate in a stirring barrel, and preparing solutions with concentration ranges of 3% and 10% respectively, wherein the concentration of the sodium carbonate is greater than that of the barium chloride;
s2, introducing the cassiterite ore pulp subjected to flotation and desulfurization into a first stirring barrel, adding the barium chloride solution prepared in the S1, stirring at the speed of 600r/min for 15min, and reacting to obtain the cassiterite ore pulp with the sulfate radical content of less than 150mg/L.
S3, introducing the ore pulp subjected to the action with the medicament in the step S2 into a second stirring barrel, and adding the sodium carbonate solution prepared in the step S1 to ensure that the pH value of the ore pulp in the stirring barrel is 9, the stirring speed is 400r/min, and the stirring time is 10min;
and S4, introducing the ore pulp in the step S3 into a shaking table for gravity separation operation, wherein the feeding concentration of the shaking table is 15%, the gradient of a bed surface is 2 degrees, and tin concentrate and tailings are obtained after one shaking table operation.
After the method provided by the invention is adopted, the tin concentrate with the Sn grade of 55.63% and the Sn recovery rate of 56.26% is obtained.
The above description is of the preferred embodiments of the present invention, and it should be understood that all equivalent changes and structural modifications made by the contents of the present specification and the drawings should be considered as the protection scope of the present invention.
Claims (4)
1. A method for promoting gravity separation in beneficiation of tin multi-metal sulfide ore is characterized by comprising the following steps:
s1, preparing solutions with the concentration ranges of 1% -3% and 5% -10% from barium chloride and sodium carbonate respectively;
s2, introducing the cassiterite pulp to be selected after flotation and desulfurization into a first stirring barrel, adding the barium chloride solution prepared in the S1, and stirring at the speed of 450-600 r/min for 10-15 min;
s3, introducing the ore pulp reacted with the medicament in the step S2 into a second stirring barrel, adding the sodium carbonate solution prepared in the step S1, and stirring at the speed of 300-400 r/min for 5-10 min;
and S4, performing reselection operation on the ore pulp in the S3 to obtain tin concentrate.
2. A method of facilitating gravity separation in beneficiation of tin-polymetallic sulphide ores according to claim 1, characterized in that: and after the barium chloride solution is added in the step S2, controlling the sulfate radical content in the ore pulp after the reaction to be less than 150mg/L.
3. A method of facilitating gravity separation in beneficiation of tin-polymetallic sulphide ores according to claim 1, characterized in that: and after the sodium carbonate solution is added in the step S3, controlling the pH value of ore pulp in the second stirring barrel after the reaction to be 8-9.
4. A method of facilitating gravity separation in beneficiation of tin-polymetallic sulphide ores according to claim 1, characterized in that: the gravity separation device comprises a shaker and a spiral chute.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211683624.9A CN115888971A (en) | 2022-12-27 | 2022-12-27 | Method for promoting gravity separation in beneficiation of tin polymetallic sulphide ore |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211683624.9A CN115888971A (en) | 2022-12-27 | 2022-12-27 | Method for promoting gravity separation in beneficiation of tin polymetallic sulphide ore |
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| CN202211683624.9A Pending CN115888971A (en) | 2022-12-27 | 2022-12-27 | Method for promoting gravity separation in beneficiation of tin polymetallic sulphide ore |
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- 2022-12-27 CN CN202211683624.9A patent/CN115888971A/en active Pending
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