CN116559034A - Type selection method of polyacrylamide flocculant for concentrating tailings - Google Patents
Type selection method of polyacrylamide flocculant for concentrating tailings Download PDFInfo
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- CN116559034A CN116559034A CN202310785533.4A CN202310785533A CN116559034A CN 116559034 A CN116559034 A CN 116559034A CN 202310785533 A CN202310785533 A CN 202310785533A CN 116559034 A CN116559034 A CN 116559034A
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- China
- Prior art keywords
- tailings
- polyacrylamide flocculant
- sedimentation
- polyacrylamide
- flocculant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229920002401 polyacrylamide Polymers 0.000 title claims abstract description 53
- 238000010187 selection method Methods 0.000 title claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000007787 solid Substances 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 23
- 239000008394 flocculating agent Substances 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims abstract description 7
- 238000005189 flocculation Methods 0.000 claims abstract description 6
- 230000016615 flocculation Effects 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 16
- 238000005352 clarification Methods 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
Abstract
The invention provides a type selection method of a polyacrylamide flocculant for concentrating tailings, which specifically comprises the following steps: step 1, respectively preparing polyacrylamide flocculating agents of different types into solutions; step 2, preparing a plurality of samples with the same mass concentration and volume for different types of tailing pulp respectively; step 3, performing a parallel comparison selection experiment of the polyacrylamide flocculant, respectively adding the polyacrylamide flocculant solutions into settling cylinders of different types of tailing pulp samples, uniformly mixing and standing; starting timing after standing, and recording the sedimentation height; determining the solid particle content of the low turbidity water layer; and step 4, selecting the polyacrylamide flocculant model with the fastest sedimentation speed and the lowest solid particle content of the low turbid water layer as the polyacrylamide flocculant model suitable for tailing pulp flocculation sedimentation. The invention can be used for guiding the type selection of the flocculant, improving the tailings concentration process index and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of mine tailing treatment, in particular to a type selection method of a polyacrylamide flocculant for tailing concentration.
Background
The wet tailings are the main form of tailings produced by concentrating mills in China at present, and most of the wet tailings are treated by pipeline transportation to a tailings pond for storage. In order to reduce construction investment and energy consumption of a tailing conveying system, concentrating equipment such as a thickener is generally adopted, and low-concentration tailing pulp and a flocculating agent are mixed to perform flocculation sedimentation, so that the purpose of concentrating the tailings and improving the concentration is achieved, and the conveying flow of the tailings is effectively reduced. In addition, after the tailing pulp is concentrated, the concentrated overflow water with extremely low solid content which is separated can be fully utilized, and the utilization rate of the circulating water in the factory is improved.
The tailing concentration process is a complex physical and chemical action process, and fine particles with smaller particle diameters in tailing pulp are prepared into larger-volume flocs by utilizing the capturing and bridging actions of a high-molecular long-chain bracket of a polyacrylamide flocculant, and the flocs realize rapid sedimentation in the pulp by utilizing the gravity of the flocs. Flocculation sedimentation has remarkable effects in improving tailing sedimentation efficiency and improving tailing water quality, but is influenced by components, density, particle size, morphology of tailings, temperature, concentration, viscosity and condensation performance of slurry, and applicability of polyacrylamide flocculants of different types to tailing pulp is not consistent, so that a method capable of guiding the type selection of the polyacrylamide flocculants for tailing concentration is urgently needed.
Disclosure of Invention
According to the method for selecting the flocculant for concentrating the tailings, less technical problems are researched, and the method for selecting the polyacrylamide flocculant for concentrating the tailings is provided, is used for guiding the type selection of the flocculant, can improve the tailings concentrating process index, reduce the production cost and can provide reference for the type selection of concentrating equipment.
The invention adopts the following technical means:
the type selection method of the polyacrylamide flocculant for concentrating tailings specifically comprises the following steps:
step 1, respectively preparing alternative polyacrylamide flocculating agents with different types into solutions;
step 2, respectively preparing a plurality of samples with the same mass concentration and volume aiming at different types of tailing pulp, and respectively placing each sample into an independent sedimentation cylinder, wherein the side wall of the sedimentation cylinder is provided with millimeter scale marks for metering;
step 3, performing parallel comparison selection experiment of polyacrylamide flocculant
Respectively adding the polyacrylamide flocculant solutions of each model prepared in the step 1 into the settling drums filled with the tailing pulp samples of different types obtained in the step 2 according to the same adding amount, uniformly mixing, standing, wherein the upper layer of a solid-liquid boundary line of a mixture in the settling drums is a low turbid water layer, and the lower layer is concentrated tailing pulp with increased concentration;
starting timing after standing, and recording the value of a solid-liquid boundary line of the mixture in the sedimentation cylinder corresponding to a scale mark on the side wall of the sedimentation cylinder at certain intervals, namely the sedimentation height;
after standing for a certain time, determining the solid particle content of the low-turbidity water layer;
step 4, respectively drawing a change curve of sedimentation height with time in each class of tailing pulp samples according to the experimental result of the step 3 and aiming at the polyacrylamide flocculant of each model;
aiming at any type of tailing pulp, the polyacrylamide flocculant model with the highest sedimentation speed and the lowest solid particle content of the low turbid water layer is selected as the polyacrylamide flocculant model suitable for flocculation sedimentation of the type of tailing pulp by combining the change curve of sedimentation height of polyacrylamide flocculants of different types in the type of tailing pulp sample along with time and the solid particle content of the corresponding low turbid water layer.
Further, in the step 1, the mass concentration of the solution is 0.1% -0.5%.
Further, the tailings slurry class in step 2 includes: iron tailings, copper tailings, lead zinc tailings, gold tailings, tungsten tailings and manganese tailings.
Further, in the step 2, the concentration of the tailing slurry is 10% -20%.
Further, in step 2, the sedimentation cylinder is a glass measuring cylinder with a glass plug, and the specifications include 250ml, 500ml and 1000ml.
Further, in the step 3, the method of uniform mixing is that the polyacrylamide flocculant solution is metered into a sedimentation cylinder filled with a tailing pulp sample by a pipette, sealing is realized by covering a glass plug of the sedimentation cylinder, and then the sedimentation cylinder is inverted up and down three times.
Further, in step 3, the interval time for recording the sedimentation height is 1min.
Further, in step 3, the time for measuring the solid particle content of the low turbid water layer was 5min.
In step 3, the method for measuring the solid particle content of the low turbid water layer is to detect the solid particle content of the solution at 1cm below the liquid level in the sedimentation cylinder by adopting a water quality SS suspension analyzer.
Compared with the prior art, the invention has the following advantages:
the method for selecting the polyacrylamide flocculant for concentrating the tailings is simple and easy to operate, clear and obvious in result and high in accuracy, can effectively guide the selection of the type of the polyacrylamide flocculant suitable for flocculating and settling of the tailings pulp, and has very important guiding significance for the design work of a tailings concentrating process.
For the reasons, the invention can be widely popularized in the field of mine tailing treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a plot of sedimentation height versus time for various types of polyacrylamide flocculants plotted in example 1 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a type selection method of a polyacrylamide flocculant for concentrating tailings, which specifically comprises the following steps:
step 1, respectively preparing alternative polyacrylamide flocculating agents with different types into solutions;
step 2, respectively preparing a plurality of samples with the same mass concentration and volume aiming at different types of tailing pulp, and respectively placing each sample into an independent sedimentation cylinder, wherein the side wall of the sedimentation cylinder is provided with millimeter scale marks for metering;
step 3, performing parallel comparison selection experiment of polyacrylamide flocculant
Respectively adding the polyacrylamide flocculant solutions of each model prepared in the step 1 into the settling drums filled with the tailing pulp samples of different types obtained in the step 2 according to the same addition amount, uniformly mixing, standing, wherein the upper layer of a solid-liquid boundary line of a mixture in the settling drums is a low-turbidity water layer with extremely low solid particle content, and the lower layer is concentrated tailing pulp with increased concentration;
starting timing after standing, and recording the value of a solid-liquid boundary line of the mixture in the sedimentation cylinder corresponding to a scale mark on the side wall of the sedimentation cylinder at certain intervals, namely the sedimentation height;
after standing for a certain time, determining the solid particle content (SS value) of the low turbid water layer;
step 4, drawing a time-dependent change curve of the sedimentation height of each type of tailing pulp sample according to the experimental result of step 3 (as shown in fig. 1, the time-dependent change of the sedimentation height of each type of polyacrylamide flocculant in the same tailing pulp is shown, namely, the sedimentation speed is shown);
aiming at any type of tailing pulp, a change curve of sedimentation height of polyacrylamide flocculant with time in the type of tailing pulp sample is combined, and the polyacrylamide flocculant model with the highest sedimentation speed and the lowest solid particle content (SS value) of the low turbid water layer is selected as the polyacrylamide flocculant model suitable for flocculation sedimentation of the type of tailing pulp.
Further, in the step 1, the mass concentration of the solution is 0.1% -0.5%.
Further, the tailings slurry class in step 2 includes: iron tailings, copper tailings, lead zinc tailings, gold tailings, tungsten tailings and manganese tailings.
Further, in the step 2, the concentration of the tailing slurry is 10% -20%.
Further, in step 2, the sedimentation cylinder is a glass measuring cylinder with a glass plug, and the specifications include 250ml, 500ml and 1000ml.
Further, in the step 3, the method of uniform mixing is that the polyacrylamide flocculant solution is metered into a sedimentation cylinder filled with a tailing pulp sample by a pipette, sealing is realized by covering a glass plug of the sedimentation cylinder, and then the sedimentation cylinder is inverted up and down three times.
Further, in the step 3, the interval time for recording the sedimentation height is 1min, and the specific interval time can be adjusted according to the sedimentation speed condition of the tailing pulp for experiments, so that the interval time selected by each experimental group in parallel comparison selection experiments is required to be consistent.
Further, in step 3, the time for measuring the solid particle content of the low turbid water layer is 5min, specifically, the clarification condition of the low turbid water layer can be observed to be adjusted as appropriate, if the clarification condition is poor, the standing time can be properly prolonged, if the clarification condition is good, the standing time is properly shortened, and the standing time selected by each experimental group in the parallel comparison selection experiment needs to be ensured to be consistent.
In step 3, the method for measuring the solid particle content of the low turbid water layer is to detect the solid particle content (SS value) of the solution at 1cm below the liquid level in the sedimentation cylinder by adopting an aqueous SS suspension analyzer.
The method for selecting the polyacrylamide flocculant for concentrating the tailings is simple and easy to operate, clear and obvious in result and high in accuracy, can effectively guide the selection of the type of the polyacrylamide flocculant suitable for flocculating and settling of the tailings pulp, and has very important guiding significance for the design work of a tailings concentrating process.
Example 1
In the embodiment, polyacrylamide flocculating agents with the types of 63026, AX868, AX9020, N3, N6 and site medicament (T951) are selected to prepare aqueous solution with the concentration of 1 per mill, multiple samples with the same mass concentration and volume are prepared aiming at certain iron tailings, the samples are respectively placed in separate 1000ml sedimentation cylinders, the glass plug is covered for sealing, and the mixture is uniformly mixed in three times of up-down inversion;
then adding the prepared flocculant solution into a sedimentation cylinder according to the dosage of 20g/t by using a pipette, sealing by a glass plug, standing after being mixed uniformly for three times upside down, starting timing, recording the sedimentation height at certain intervals, and measuring and recording the solid particle content value of a low turbid water layer after standing for 10 min;
the sedimentation height values of the groups obtained by adding different types of flocculants under the same conditions are plotted and compared, and meanwhile, the solid particle content (SS value) of the low turbid water layer is compared, and the test results are shown in tables 1, 2 and figure 1.
TABLE 1 flocculant selection test results
Table 2 flocculant selection test settling for 10min upper layer liquid solids content
And (3) observing and comparing a tailing sedimentation curve graph and the turbidity condition of the supernatant liquid, and determining that the type of the organic polymeric flocculant suitable for flocculating sedimentation of the iron tailings is N3 by combining with fig. 1 and tables 1-2.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.
Claims (9)
1. The type selection method of the polyacrylamide flocculant for concentrating tailings is characterized by comprising the following steps of:
step 1, respectively preparing alternative polyacrylamide flocculating agents with different types into solutions;
step 2, respectively preparing a plurality of samples with the same mass concentration and volume aiming at different types of tailing pulp, and respectively placing each sample into an independent sedimentation cylinder, wherein the side wall of the sedimentation cylinder is provided with millimeter scale marks for metering;
step 3, performing parallel comparison selection experiment of polyacrylamide flocculant
Respectively adding the polyacrylamide flocculant solutions of each model prepared in the step 1 into the settling drums filled with the tailing pulp samples of different types obtained in the step 2 according to the same adding amount, uniformly mixing, standing, wherein the upper layer of a solid-liquid boundary line of a mixture in the settling drums is a low turbid water layer, and the lower layer is concentrated tailing pulp with increased concentration;
starting timing after standing, and recording the value of a solid-liquid boundary line of the mixture in the sedimentation cylinder corresponding to a scale mark on the side wall of the sedimentation cylinder at certain intervals, namely the sedimentation height;
after standing for a certain time, determining the solid particle content of the low-turbidity water layer;
step 4, respectively drawing a change curve of sedimentation height with time in each class of tailing pulp samples according to the experimental result of the step 3 and aiming at the polyacrylamide flocculant of each model;
aiming at any type of tailing pulp, the polyacrylamide flocculant model with the highest sedimentation speed and the lowest solid particle content of the low turbid water layer is selected as the polyacrylamide flocculant model suitable for flocculation sedimentation of the type of tailing pulp by combining the change curve of sedimentation height of polyacrylamide flocculants of different types in the type of tailing pulp sample along with time and the solid particle content of the corresponding low turbid water layer.
2. The method for dressing a polyacrylamide flocculant for tailings concentration of claim 1 wherein in step 1, the mass concentration of the solution is 0.1% -0.5%.
3. The method of claim 1, wherein the tailings slurry classification in step 2 comprises: iron tailings, copper tailings, lead zinc tailings, gold tailings, tungsten tailings and manganese tailings.
4. The method for dressing polyacrylamide flocculant for tailings concentration of claim 1 wherein in step 2, the tailings slurry concentration is 10% to 20%.
5. The method for dressing a polyacrylamide flocculant for tailings concentration of claim 1 wherein in step 2, the settling cask is a glass graduated cylinder having a glass plug.
6. The method for dressing a polyacrylamide flocculant for tailings concentration according to claim 1, wherein in step 3, the method of mixing uniformly is that a polyacrylamide flocculant solution is pipetted into a settling cylinder containing a tailing slurry sample, sealing is achieved by covering a glass plug of the settling cylinder, and then the solution is inverted three times.
7. The method for dressing a polyacrylamide flocculant for tailings concentration of claim 1 wherein in step 3, the interval time for recording the sedimentation height is 1min.
8. The method for dressing a polyacrylamide flocculant for tailings concentration of claim 1 wherein in step 3, the time to determine the solids content of the low turbidity water layer is 5 minutes.
9. The method for selecting the polyacrylamide flocculant for concentrating tailings according to claim 1, wherein in the step 3, the determination method of the solid particle content of the low turbid water layer is that a water quality SS suspension analyzer is adopted to detect the solid particle content of a solution at 1cm below the liquid level in a sedimentation cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310785533.4A CN116559034A (en) | 2023-06-29 | 2023-06-29 | Type selection method of polyacrylamide flocculant for concentrating tailings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310785533.4A CN116559034A (en) | 2023-06-29 | 2023-06-29 | Type selection method of polyacrylamide flocculant for concentrating tailings |
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| CN116559034A true CN116559034A (en) | 2023-08-08 |
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| CN202310785533.4A Pending CN116559034A (en) | 2023-06-29 | 2023-06-29 | Type selection method of polyacrylamide flocculant for concentrating tailings |
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- 2023-06-29 CN CN202310785533.4A patent/CN116559034A/en active Pending
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