AU2020103708A4 - Straight-flow type coal slime superfine classification grade equipment and classification method - Google Patents
Straight-flow type coal slime superfine classification grade equipment and classification method Download PDFInfo
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- AU2020103708A4 AU2020103708A4 AU2020103708A AU2020103708A AU2020103708A4 AU 2020103708 A4 AU2020103708 A4 AU 2020103708A4 AU 2020103708 A AU2020103708 A AU 2020103708A AU 2020103708 A AU2020103708 A AU 2020103708A AU 2020103708 A4 AU2020103708 A4 AU 2020103708A4
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- classifier
- settling
- flow
- slime
- settling classifier
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000000630 rising effect Effects 0.000 claims abstract description 20
- 239000011362 coarse particle Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000011882 ultra-fine particle Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000001174 ascending effect Effects 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000009916 joint effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005188 flotation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/60—Washing granular, powdered or lumpy materials; Wet separating by non-mechanical classifiers, e.g. slime tanksÂ
-
- 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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention discloses a straight-flow coal slime superfine classification
equipment and a classification method, which comprise a settling classifier, wherein a
feed pipe is arranged at the front end of the settling classifier, an overflow groove is
arranged at the rear end of the settling classifier, and an overflow discharge pipe is
arranged at the bottom of the overflow groove; The settling classifier is provided with
a rising water supply pipe, and the bottom of the settling classifier is provided with a
bottom flow discharge pipe. According to the invention, based on the principle of
interference settlement, the horizontal movement and interference settlement
characteristics of particles of each particle level in the ultra-fine particle classifier are
utilized to realize the ultra-subdivision of coal slime; The settling speed of coarse
particles is fast, the settling time of coarse particles is shortened by tilting the bottom
of the machine, and the downward sliding of coarse particles to the bottom flow
discharge pipe is accelerated, which is beneficial to the timely discharge of coarse
particles and reduces its influence on other particles; The settling classifier is equipped
with rising water. Under the action of rising water flow, the ultra-fine slime obtains
upward movement speed and flows to the overflow groove under the action of
horizontal flow, thus strengthening the ultra-subdivision effect on the slime and
reducing the fine slime content in the bottom flow.
-1/2
Figure 1
Description
-1/2
Figure 1
Technical field
The invention relates to a straight-flow coal slime superfine classification
equipment and a classification method, belonging to the technical field of coal slime
sorting.
Background art
With the improvement of coal mining mechanization and the deepening of
mining depth, the proportion of fine particle content in raw coal is increasing. At the
same time, the proportion of ultra-fine particles (-0.045 mm) in fine slime (-0.5 mm)
is also increasing. In the coal separation, this part of particles enter the slime water,
and the ultra-fine particles are mainly high ash fine mud after mud. Ultrafine
particles have fine particle size and large specific surface area to preferentially
adsorb agents, thus reducing the recovery rate of coal slime. At the same time,
ultra-fine particles enter the clean coal product through the cover and entrainment to
increase the ash content of clean coal, resulting in poor mixed flotation effect of coal
slime. In addition, ultra-fine particles increase bubble viscosity, resulting in thin
filter cake, large moisture content, low shedding rate and other problems of the filter,
deteriorating the filter pressure dehydration operation effect. The influence of
ultra-fine particles on coal preparation is increasingly prominent.
Coal slime classification equipment in coal preparation production generally
has a small diameter hydrocyclone, which classifies under centrifugal force field,
and the classification particle size is usually about 0.25 mm. Its main function is to
ensure that there are no coarse particles in flotation feed, rather than to remove fine
slime. At present, there are no means and methods to remove-0.045 mm fine slime in domestic coal preparation plants. Due to the adverse effects of high ash and fine mud on flotation, most coal preparation plants can only ensure the ash content of clean coal at the cost of reducing the clean coal yield of the whole plant. Therefore, high-efficiency and energy-saving ultra-fine slime classification equipment and methods will play a vital role in coal preparation production.
Summary
The invention provides a direct-flow coal slime superfine classification
grading equipment and a grading method, which are used for solving the problems
existing in the prior art.
In order to realize the above purpose, the technical scheme adopted by the
invention is as follows: a straight-flow coal slime superfine classification
equipment comprises a settling classifier, wherein the front end of the settling
classifier is provided with a material feeding pipe, the rear end of the settling
classifier is provided with an overflow groove, and the bottom of the overflow
groove is provided with an overflow discharge pipe; The settling classifier is
provided with a rising water supply pipe, and the bottom of the settling classifier is
provided with a bottom flow discharge pipe.
Further, the settling classifier has a narrow front and wide rear structure, and the
overflow groove is located outside the rear wall of the settling classifier.
Further, the feeding pipe is located at one end inside the settling classifier and is
provided with a feeding nozzle, the feeding nozzle has a front wide and rear narrow
structure, and the width of the feeding nozzle is equal to the width of the inner wall
of the settling classifier.
Further, the horizontal height of the rising water supply pipe is lower than the
horizontal height of the overflow groove.
Further, the rising water supply pipe is composed of a plurality of pipelines, the
length of the pipelines is slightly smaller than the width of the inner wall of the
settlement classifier, the plurality of pipelines are arranged in parallel, and the span
of the plurality of pipelines is slightly smaller than the length of the settlement
classifier at the horizontal position where the pipelines are located.
A straight-flow type coal slime superfine classification method comprise that
following step:
(a) feeding the slime water into the settling classifier from the feeding pipe
through the feeding nozzle through the slag slurry pump;
(b) open and adjust that overflow discharge pipe and the bottom flow discharge
pipe to form a stable liquid surface layer in the settling classifier. In the process of
slurry movement level, coarse particle material settles to the bottom of the settling
classifier, slides downward and is discharged from the bottom flow discharge pipe,
and ultra-fine particles flow horizontally to the overflow groove and are discharged
from the overflow discharge pipe;
(c) The rising water is driven into the settling classifier from the rising water
supply pipe through the pressurizing pump, and the ultra-fine particles in the settling
classifier move upward under the action of the rising water flow and move to the
overflow groove under the joint action of the horizontal flow, thus strengthening the
classification of the ultra-fine slime.
Further, the particle size of the slime in the slime water in the step a is-0.5 mm.
Compared with the prior art, the invention is based on the principle of
interference settlement, and utilizes the horizontal movement characteristics and
interference settlement of each particle grade particle in the ultra-fine particle
classification tank to realize the ultra-fine classification of coal slime; The settling
speed of coarse particles is fast, the settling time of coarse particles is shortened by
tilting the bottom of the machine, and the downward sliding of coarse particles to the bottom flow discharge pipe is accelerated, which is beneficial to the timely discharge of coarse particles and reduces its influence on other particles; Rising water is arranged in the settlement classifier. Under the action of rising water flow, thesuperfine slime obtains upward movement speed and flows to the overflow groove under the action of horizontal flow, so as to strengthen the classification effect on thesuperfine slime and reduce the fine slime content in the underflow. By adjusting the feeding speed, feeding angle and rising water speed, the working state of the equipment can be conveniently adjusted according to the feeding properties and product quality requirements, so as to adapt to a wider feeding particle size range, ensure the accuracy of settlement classification and meet the needs of actual production. At the same time, the invention has the advantages of simple structure, simple operation, less power consumption, energy saving and high efficiency, improves the removal rate of ultra-fine coal slime, and realizes high-efficiency settlement classification of ultra-fine coal slime.
Description of drawings
FIG. 1 is a side view of that interior structure of the present invention;
FIG. 2 is a top view of that internal structure of the present invention;
In the figure: 1. Feeding pipe, 2. Feeding nozzle, 3. Settlement classifier, 4.
overflow groove, 5. Overflow discharge pipe, 6. Rising water supply pipe, 7. the
bottom flow discharge pipe.
Description of the present Invention
The present invention is further described in combination with the attached
drawings.
In the following, the technical scheme in the embodiment of the invention will
be described clearly and completely in combination with the drawings in the
embodiment of the invention. Obviously, the described embodiment is only a part of
the embodiment of the invention, not all the embodiments. Based on the embodiment of the invention, all other embodiments obtained by ordinary technical personnel in the art without creative labor belong to the scope of protection of the invention.
As shown in FIG.1 and FIG.2, that invention comprise a settling classifier 3, the body of the settling classifier 3 is made of plexiglass, the front end of the settling classifier 3 is provide with a feed pipe 1, the rear end of the settling classifier 3 is provided with an overflow groove 4, and the bottom of the overflow groove 4 is provided with an overflow discharge pipe 5; The settling classifier 3 is provided with a rising water supply pipe 6, and the bottom of the settling classifier 3 is provided with a bottom flow discharge pipe 7.
During slime classification, slime water is firstly fed into the settling classifier 3 from the feeding pipe 1 through the slurry pump; Then, the overflow discharge pipe and the bottom flow discharge pipe 7 are opened and adjusted, and a stable liquid surface layer is formed in the settling classifier 3 at this time. In the process of slurry movement level, coarse granular materials settle to the bottom of the settling classifier 3 and are discharged from the bottom flow discharge pipe 7, and ultra-fine particles flow horizontally to the overflow groove 4 and are discharged from the overflow discharge pipe 5; The ascending water is driven into the settling classifier 3 from the ascending water supply pipe 6 through the pressurizing pump, and the ultra-fine particles in the settling classifier 3 move upward under the action of the ascending water flow and move to the overflow groove 4 under the joint action of the horizontal flow, so as to realize the classification of the enhanced ultra-fine coal slime.
The settling classifier 3 has a narrow front and wide rear structure, and the front side surface is an inclined surface, so that the settling speed of coarse particles is effectively accelerated and the settling time of coarse particles is shortened. The overflow groove 4 is located outside the rear wall of the settling classifier 3, and the horizontal height of the overflow groove 4 is higher than the horizontal height of the rising water supply pipe 6, thus effectively improving the slime classification effect.
A fee nozzle 2 is arranged at one end of that fee pipe 1 located inside the
settling classifier 3, wherein the fee nozzle 2 has a front wide and rear narrow
structure and the width of the fee nozzle 2 is equal to the width of the inner wall of
the settling classifier 3, and the fee pipe 1 is of an adjustable angle type; The rising
water supply pipe 6 is composed of a plurality of pipelines, the length of the
pipelines is slightly smaller than the width of the inner wall of the settlement
classifier 3, the plurality of pipelines are arranged in parallel, and the span of the
plurality of pipelines is slightly smaller than the length of the settlement classifier 3
at the horizontal position of the pipelines; By adjusting the feeding speed, feeding
angle and rising water speed, the equipment can be conveniently adjusted according
to the properties of the feeding material and the quality requirements of the product,
so as to adapt to a wider range of feeding particle size, ensure the accuracy of
settlement classification and meet the needs of actual production.
For those skilled in the art, it is obvious that the invention is not limited to the
details of the above exemplary embodiments, and can be implemented in other
specific forms without departing from the spirit or basic features of the invention.
Therefore, from any point of view, the embodiment should be regarded as exemplary
and non restrictive. The scope of the invention is defined by the attached claims
rather than the above description, so it is intended to include all changes falling
within the meaning and scope of the equivalent elements of the claims in the
invention. Any reference numerals in the claims shall not be regarded as limiting the
claims involved.
The above is only a better embodiment of the invention, and does not limit the
invention. Any minor modification, equivalent replacement and improvement made
to the above embodiment according to the technical essence of the invention shall be
included in the protection scope of the technical scheme of the invention.
Claims (7)
1. A straight-flow type coal slime superfine classification equipment,
characterized in that it comprises a settling classifier (3), the front end of the settling
classifier (3) is provided with a feed pipe (1), the rear end of the settling classifier (3)
is provided with an overflow groove (4), and the bottom of the overflow groove (4)
is provided with an overflow discharge pipe (5); A rising water supply pipe (6) is
arranged in the settling classifier (3), and a bottom flow discharge pipe (7) is
arranged at the bottom of the settling classifier (3).
2. A straight-flow type coal slime superfine classification equipment according
to claim 1, characterized in that the settling classifier (3) has a narrow front and wide
rear structure, and the overflow groove (4) is located outside the rear wall of the
settling classifier (3).
3. A straight-flow type coal slime superfine classification equipment according
to claim 1, characterized in that the feed pipe (1) is located at one end inside the
settling classifier (3) and is provided with a feed nozzle (2), the feed nozzle (2) has a
front wide and rear narrow structure, and the width of the feed nozzle (2) is equal to
the width of the inner wall of the settling classifier (3).
4.A straight-flow slime superfine classification equipment according to claim 1,
characterized in that the horizontal height of the rising water supply pipe (6) is lower
than the horizontal height of the overflow groove (4).
5. A straight-flow type coal slime superfine classification equipment according
to claim 4, characterized in that the rising water supply pipe (6) consists of a
plurality of pipelines, the length of which is slightly smaller than the width of the
inner wall of the settlement classifier (3), the plurality of pipelines are arranged in
parallel, and the span of the plurality of pipelines is slightly smaller than the length
of the settlement classifier (3) at the horizontal position of the pipelines.
6. A straight-flow type coal slime superfine classification method, characterize in that it comprises that follow steps:
(a) the slime water is fed into the settling classifier (3) from the feeding pipe (1)
through the feeding nozzle (2);
(b) Opening and adjusting the overflow discharge pipe (5) and the bottom flow
discharge pipe (7), forming a stable liquid surface layer in the settling classifier (3),
during the process of slurry movement level, coarse particle material settles to the
bottom of the settling classifier (3) and is discharged by the bottom flow discharge
pipe (7), and ultra-fine particles flow horizontally to the overflow groove (4) and are
discharged by the overflow discharge pipe (5);
(c) pour that water supply pipe (6) through the ascending water into the settling
classifier (3), the ultra-fine particles in the settling classifier (3) move upward under
the action of the ascending water flow and move to the overflow groove (4) under
the joint action of the horizontal flow, so as to strengthen the classification of the
ultra-fine coal slime.
7. A straight-flow slime superfine classification method according to claim 6,
wherein the slime particle size in the slime water of step a is-0.5 mm.
Figure 1 -1/2-
-2/2-
Figure 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103708A AU2020103708A4 (en) | 2020-11-26 | 2020-11-26 | Straight-flow type coal slime superfine classification grade equipment and classification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103708A AU2020103708A4 (en) | 2020-11-26 | 2020-11-26 | Straight-flow type coal slime superfine classification grade equipment and classification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020103708A4 true AU2020103708A4 (en) | 2021-02-11 |
Family
ID=74502269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020103708A Ceased AU2020103708A4 (en) | 2020-11-26 | 2020-11-26 | Straight-flow type coal slime superfine classification grade equipment and classification method |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2020103708A4 (en) |
-
2020
- 2020-11-26 AU AU2020103708A patent/AU2020103708A4/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |