CN113457264A - Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry - Google Patents
Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry Download PDFInfo
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- CN113457264A CN113457264A CN202110724701.XA CN202110724701A CN113457264A CN 113457264 A CN113457264 A CN 113457264A CN 202110724701 A CN202110724701 A CN 202110724701A CN 113457264 A CN113457264 A CN 113457264A
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- ore pulp
- pipeline
- pulp
- iron concentrate
- magnetic field
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000012141 concentrate Substances 0.000 title claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000001914 filtration Methods 0.000 title claims abstract description 43
- 239000002002 slurry Substances 0.000 title claims description 42
- 239000002245 particle Substances 0.000 claims abstract description 49
- 230000001965 increasing effect Effects 0.000 claims abstract description 48
- 230000005389 magnetism Effects 0.000 claims abstract description 44
- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 230000005415 magnetization Effects 0.000 claims abstract description 4
- 239000012065 filter cake Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 12
- 238000004140 cleaning Methods 0.000 abstract description 4
- 239000010419 fine particle Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000005054 agglomeration Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 concentration Substances 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/06—Filters making use of electricity or magnetism
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a method for adjusting the gradation of concentrated iron ore pulp conveyed by a pipeline, which comprises the following steps: feeding ore pulp into an ore pulp conveying pipeline, applying a magnetic field to the ore pulp through the conveying pipeline provided with a magnetism increasing device to perform magnetism increasing treatment on the ore pulp, controlling the grading value of the ore pulp through adjusting the size of the magnetic field, and conveying the magnetism increased ore pulp into an output pipeline; and to an apparatus for the above method. Also discloses a method and a device for filtering the iron concentrate pulp, wherein the filtering method is used for filtering the pulp in the output pipeline after the magnetization. The invention condenses the fine particle size in the ore pulp into large particles by magnetization, so that the grading value of the output ore pulp effectively adapts to the process requirement of the ceramic filter plate, the filtering performance and efficiency of the ceramic filter are effectively improved, and the attenuation consumption and the cleaning cost of the ceramic filter plate are saved.
Description
Technical Field
The invention relates to the field of slurry conveying and solid-liquid separation, in particular to a method and a device for conveying iron concentrate slurry gradation by using a magnetic field adjusting pipeline, and an iron concentrate slurry filtering method and a device based on the method and the device.
Background
The iron ore dressing process comprises the working procedures of crushing, grinding, filtering and dewatering and the like, wherein the iron concentrate pulp needs to be filtered during the filtering and dewatering operation, so that the iron concentrate pulp passes through the filtering equipment to achieve the purpose of dewatering. The requirement for iron grade in the production process is gradually improved, so that the grain size grading of the iron ore concentrate in the ore pulp is thinned, and meanwhile, the residual magnetism in the ore concentrate is eliminated because the ore pulp conveyed by the pipeline is the demagnetized iron ore concentrate, so that the ore pulp is fully dispersed in the filtration.
In the prior art, no effective control means and method for the particle size of the ore pulp in the pipeline before filtration exist, the ore pulp produced by an upstream process is usually directly filtered, and the grading of the ore pulp cannot be adjusted according to the actual condition of the ore pulp and the requirement of a filtering device. The micropores of the ceramic filter are easy to block, the filtration coefficient of the ceramic filter is reduced, the filtrate is turbid, and meanwhile, the water content of the filter cake cannot meet the relevant requirements of the downstream process. The life cycle of the ceramic filter plate is shortened, the cleaning frequency of the ceramic plate is improved, and the filtering performance and the service efficiency of the ceramic filter are seriously influenced.
Disclosure of Invention
The invention aims to: aiming at the problems that the pulp produced by the existing upstream process is directly filtered, the gradation of the pulp cannot be adjusted according to the actual condition of the pulp and the requirement of filtering equipment, and the iron concentrate gradation becomes thin and the filtering performance of a ceramic filter is reduced, the method and the device for adjusting the gradation of the iron concentrate pulp conveyed by a pipeline, the method and the device for filtering the iron concentrate pulp are provided, the method and the device for forming magnetic agglomeration and cohesion between the pulp to adapt to the filtering gradation of the ceramic filter are formed by magnetizing the iron concentrate pulp, and the method and the device for improving the filtering efficiency of the iron concentrate pulp by using the method and the device are also provided.
The technical scheme adopted by the invention is as follows:
the invention designs a method for adjusting the gradation of concentrated iron ore pulp conveyed by a pipeline, which comprises the following process steps: firstly, feeding ore pulp into an ore pulp conveying pipeline; the ore pulp of the first step passes through a conveying pipeline provided with a magnetism increasing device, a magnetic field is applied to the ore pulp to increase the magnetism of the ore pulp, the grading value of the ore pulp is controlled by adjusting the size of the magnetic field, and the ore pulp is conveyed to an output pipeline. The magnetic iron ore concentrate particles in the iron ore concentrate slurry can be magnetized again under the action of the external magnetic field of the magnetism increasing device, certain magnetism is still kept after the magnetic iron ore concentrate particles leave the magnetic field, smaller ore concentrate particles are agglomerated under the action of the magnetic hinge, the mineral particles form magnetic agglomeration flocs, the particle size is increased, and the effective particle size grading of the particles is increased.
Further, the concentration of the ore pulp in the ore pulp conveying pipeline is detected, the size of the magnetic field is adjusted according to the concentration value, and the ore pulp gradation value is controlled. Because the concentration of the ore pulp is different, the magnetic field of the magnetism increasing device has different magnetism increasing effects on the ore pulp, and the grading of the ore pulp after magnetism increasing is influenced, so that the magnetic field needs to be adjusted according to the concentration of the ore pulp in the ore pulp conveying pipeline, and the ore pulp grading value can meet the requirements of the subsequent process after the magnetism increasing step.
Further, the ore pulp in the ore pulp conveying pipeline is subjected to particle size detection, the size of the magnetic field is adjusted according to the particle size value, and the ore pulp grading value is controlled. Because the particle size of the particles in the ore pulp is different, the magnetic hinge effect of the iron ore concentrate particles after the magnetism increasing step is influenced, and the effect of forming magnetic agglomeration flocs by the mineral particles is influenced, therefore, the magnetic field needs to be adjusted according to the change of the particle size of the ore pulp in the ore pulp conveying pipeline before and after the magnetism increasing step, and the ore pulp grading value can meet the subsequent process requirements after the magnetism increasing step.
The invention designs a method for improving the filtering efficiency of iron concentrate pulp, which comprises the following process steps: the ore pulp is conveyed into an ore pulp conveying pipeline, the ore pulp passes through the conveying pipeline provided with the magnetism increasing device, a magnetic field is applied to the ore pulp to increase the magnetism of the ore pulp, the grading value of the ore pulp is controlled by adjusting the size of the magnetic field, and after the ore pulp is conveyed to an output pipeline, the ore pulp is filtered. The invention controls the grading value of the ore pulp through the previous step, so that the grading value of the ore pulp before the filtering step is carried out and the requirement of the filtering step on the grading of the ore pulp are met, and the efficiency of the filtering step is improved.
Further, the filtered ore pulp or filter cake is subjected to moisture measurement, the size of the magnetic field is adjusted according to the measured value, and the ore pulp gradation value is controlled. The implementation effect of the filtering step can be visually reflected by the water value of the filtered ore pulp or filter cake, so that the water of the filter cake needs to be measured, and if the water of the filter cake is too large or too small, the size of the magnetic field can be increased or reduced to enable the ore pulp gradation value to be matched with the efficiency of the filtering step at any time.
The invention also discloses a device for adjusting the grading of the iron concentrate slurry conveyed by the pipeline, and the magnetism increasing device is arranged on the iron concentrate slurry conveying pipeline. The magnetism increasing device applies an external magnetic field to the iron concentrate pulp in the pipeline, magnetic iron concentrate particles in the pulp can be magnetized again, after the magnetic iron concentrate particles leave the magnetism increasing device, certain magnetism of the magnetic iron concentrate particles in the pulp still remains, and smaller concentrate particles are agglomerated under the action of the magnetic hinge, so that the magnetic iron concentrate particles in the pulp form magnetic agglomeration flocs, the particle size of the pulp is improved, and the effective particle size grading of the particles is increased.
Furthermore, concentration or granularity detection equipment is arranged at the front and the rear of the magnetism increasing device. So as to grasp the state of the iron concentrate slurry in the pipeline in real time to determine the operation effect of the magnetism increasing device.
Furthermore, the magnetism increasing device adopts a solenoid, the solenoid is sleeved on the iron concentrate slurry conveying pipeline, a magnetic field generated by a solenoid sleeve is a variable magnetic field, and the magnetic field intensity is 1-100 gausses. Due to the special structure of the pipeline, the solenoid is adopted as the magnetism increasing device, so that the pipeline and the magnetism increasing device have better structural matching degree, the space is saved, and the cost is reduced.
The invention also designs an iron concentrate slurry filtering device which comprises a filter arranged behind the device for adjusting the gradation of the iron concentrate slurry conveyed by the pipeline. The device for grading the iron concentrate slurry conveyed by the pipeline is organically combined with the existing filter, so that the slurry after grading adjustment meets the requirement of the filter on the slurry, and the filtering efficiency of the filter is improved.
Further, the filter is a ceramic filter.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the small particle size in the ore pulp is magnetized again through magnetization, and after the ore pulp leaves a magnetic field, the smaller iron ore concentrate particles are agglomerated under the action of a magnetic hinge, so that the mineral particles form magnetic agglomeration flocs, the particle size is increased, the effective particle size grading of the particles is increased, and the grading value of the output ore pulp is more effectively adapted to subsequent corresponding process equipment.
2. The grading value of the output ore pulp is matched with the process requirement of the ceramic filter plate, so that the filtering performance and efficiency of the ceramic filter are effectively improved, and the attenuation consumption and the cleaning cost of the ceramic filter plate are saved.
3. The water content of the filter cake generated after filtration is controlled by adapting the grading value of the ore pulp to the process requirements of the ceramic filter plate, so that the water content value of the filter cake meets the subsequent process requirements.
Drawings
Fig. 1 is a schematic view of the structure of an iron concentrate slurry filtering apparatus according to the present invention.
The labels in the figure are: 1 is a conveying pipeline, 2 is a slurry pump, 3 is concentration detection equipment, 4 is a magnetism increasing device, 5 is particle size detection equipment, 6 is a filter, and 7 is moisture detection equipment.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, discloses a device for adjusting the grading of a pipeline-conveyed iron concentrate slurry and an iron concentrate slurry filtering device using the device, comprising a conveying pipeline 1, a magnetism increasing device 4 and a detecting device; the input end of the conveying pipeline 1 is provided with a slurry pump 2 for conveying the ore slurry to subsequent equipment and ensuring the effective flow of slurry in the pipeline; a concentration detection device 3 is arranged at the rear end of the slurry pump 2, and is used for monitoring key numerical values such as granularity, concentration and the like of slurry in a pipeline in real time, a magnetism increasing device 4 is arranged on the pipeline at the rear end of the concentration detection device 3, and the pipeline in the magnetism increasing device 4 is made of high polymer materials or other materials through which a magnetic field can penetrate; the magnetism increasing device 4 adopts a solenoid, the solenoid is sleeved on the iron concentrate slurry conveying pipeline 1, a magnetic field generated by electrifying the solenoid sleeve is a variable magnetic field, the magnetic field intensity is 1-100 gauss, and the slurry is increased in an instant after passing through the solenoid, so that the pipeline and the magnetism increasing device 4 are better in structural matching degree due to the special structure of the pipeline, the space is saved, and the cost is reduced. And a particle size detection device 5 is arranged behind the magnetism increasing device 4, and is used for detecting the particle size of slurry in the pipeline and monitoring the magnetic flux in real time. The outlet of the output pipeline is provided with a ceramic filter 6, and the ore pulp which meets the requirement of the filter 6 on the ore pulp after the grading adjustment is filtered. The ceramic filter 6 is provided with a device 7 for detecting the moisture of the filter cake.
The invention relates to a device for adjusting the grading of iron concentrate slurry conveyed by a pipeline and a using method and a principle of an iron concentrate slurry filtering device using the device, wherein the using method comprises the following steps:
firstly, feeding ore pulp into an ore pulp conveying pipeline 1, and providing stable pressure for the ore pulp in the pipeline through a slurry pump 2, so that the pressure of the ore pulp in the pipeline is ensured to be stable, and the effective filtration of a filter 6 is ensured;
secondly, detecting the concentration and the particle size of ore pulp to be conveyed to magnetism increasing equipment before magnetism increasing;
thirdly, electrifying the solenoid sleeve to generate a variable magnetic field with the magnetic field intensity of 1-100 gauss, conveying the detected ore pulp to a conveying pipeline 1 provided with a magnetizing device 4, magnetizing the ore pulp instantly after passing through the solenoid, and applying the magnetic field to the ore pulp to magnetize the ore pulp; controlling the grading value of the ore pulp by adjusting the size of the magnetic field, and conveying the ore pulp into an output pipeline; magnetic iron ore concentrate particles in the iron ore concentrate slurry are instantaneously magnetized under the action of an external magnetic field of the magnetism increasing device 4, and certain magnetism is still kept after the magnetic iron ore concentrate particles leave the magnetic field, so that smaller ore concentrate particles are agglomerated under the action of a magnetic hinge, mineral particles form magnetic agglomeration flocs, the particle size is increased, and the effective particle size grading of the particles is increased;
fourthly, detecting the concentration, the particle size and the magnetic flux of the ore pulp to be conveyed to the filter 6;
fifthly, filtering the ore pulp detected in the fifth step by using a ceramic filter 6;
and sixthly, measuring the moisture of the filtered ore pulp or filter cake.
In the implementation process, the concentration and the granularity of particles in the ore pulp influence the step of magnetizing the ore pulp by the magnetic field of the magnetizing device 4 and the grading of the ore pulp after the magnetizing, and influence the magnetic hinge effect of the concentrate particles after the magnetizing step and the effect of forming magnetic agglomeration flocs by the mineral particles.
Therefore, the magnetic field needs to be adjusted according to the concentration and the granularity of the ore pulp in the ore pulp conveying pipeline 1 to ensure that the ore pulp gradation value can meet the process requirement of the ceramic filter 6 after the magnetism increasing step. The water value of the filtered ore pulp or filter cake can visually reflect the implementation effect of the filtering step, and the size of the magnetic field of the magnetism increasing device 4 is adjusted in time by combining the key values of water, concentration, particle size, magnetic flux and the like detected by three detection points, so that the ore pulp grading value is matched with the efficiency of the filtering step at any time. Effectively improve the filtering performance and efficiency of the ceramic filter 6 and save the attenuation consumption and cleaning cost of the ceramic filter plate. And simultaneously controlling the water content of the filter cake generated after filtration to ensure that the water content value of the filter cake meets the requirements of the subsequent process.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A method for adjusting the grading of iron concentrate slurry conveyed by a pipeline is characterized by comprising the following steps: the method comprises the following process steps:
a. feeding the ore pulp into an ore pulp conveying pipeline (1);
b. b, applying a magnetic field to the ore pulp in the step a through a conveying pipeline (1) provided with a magnetism increasing device (4) to perform magnetism increasing treatment, and controlling the grading value of the ore pulp by adjusting the size of the magnetic field;
c. and c, conveying the ore pulp magnetized in the step b to an output pipeline.
2. The method of adjusting the gradation of a slurry of a pipeline conveyed iron concentrate according to claim 1, characterized in that: and (3) detecting the concentration of the ore pulp in the ore pulp conveying pipeline (1), adjusting the size of the magnetic field according to the detected concentration value, and controlling the ore pulp gradation value.
3. The method of adjusting the gradation of a slurry of a pipeline conveyed iron concentrate according to claim 1, characterized in that: the ore pulp in the ore pulp conveying pipeline (1) and the ore pulp after magnetization are respectively subjected to particle size detection, and the magnetic field is adjusted according to the detected particle size change value to control the ore pulp grading value.
4. A method for improving the filtering efficiency of iron concentrate pulp is characterized in that: treatment of the pulp by the method for adjusting the gradation of a piping iron concentrate pulp according to any one of claims 1-3 before the pulp is subjected to the filtering step.
5. A method for increasing the filtering efficiency of iron concentrate slurry according to claim 4, characterized in that: and measuring the moisture of the filtered filter cake, adjusting the size of the magnetic field according to the measured value, and controlling the ore pulp gradation value.
6. A device for adjusting the grading of iron concentrate slurry conveyed by a pipeline is characterized in that a magnetism increasing device (4) is arranged on an iron concentrate slurry conveying pipeline (1).
7. The apparatus for conditioning the pulp of iron concentrate transported in a pipeline according to claim 6, characterized in that: concentration detection equipment (3) and particle size detection equipment (5) are arranged at the front and the back of the magnetism increasing device (4).
8. The apparatus for conditioning the pulp of iron concentrate transported in a pipeline according to claim 6, characterized in that: the magnetism increasing device (4) adopts a solenoid, the solenoid is sleeved on the iron concentrate slurry conveying pipeline (1), a magnetic field generated by a solenoid sleeve is a variable magnetic field, and the magnetic field intensity is 1-100 gauss.
9. The utility model provides an iron concentrate pulp filter equipment which characterized in that: comprising a filter (6) and a device for adjusting the gradation of a piping carrying iron concentrate slurry according to any one of claims 6 to 8 connected to the front end of the filter (6).
10. The iron concentrate slurry filtering device according to claim 9, characterized in that: the filter (6) is a ceramic filter (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724701.XA CN113457264A (en) | 2021-06-29 | 2021-06-29 | Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724701.XA CN113457264A (en) | 2021-06-29 | 2021-06-29 | Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry |
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| CN113457264A true CN113457264A (en) | 2021-10-01 |
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Application publication date: 20211001 |
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