CN109201319A - It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes - Google Patents
It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes Download PDFInfo
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- CN109201319A CN109201319A CN201811135651.6A CN201811135651A CN109201319A CN 109201319 A CN109201319 A CN 109201319A CN 201811135651 A CN201811135651 A CN 201811135651A CN 109201319 A CN109201319 A CN 109201319A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
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Abstract
本发明提供一种基于分流单独处理降低选煤厂重介质消耗的工艺。主要包括以下步骤：原煤经过重介分选后产品进入脱介筛；脱介筛前段筛下成为合格介质，后段筛下成为稀介质；稀介质进入稀介质桶；合格介质经过分流一部分进入合格介质桶，一部分经脱磁器分散后进入合格介质磁选机；合格介质磁选机精矿进入合格介质桶，尾矿进入稀介桶；稀介质桶物料进入稀介质磁选机；稀介质磁选机精矿返回合格介质桶，尾矿进入煤泥水处理工艺。本发明的特点在于通过设置脱磁器消除介质磁团聚为后续回收创造有利条件，通过合格介质单独采用磁选机处理提升介质回收环节的稳定性，采用本工艺增加了介质回收过程的稳定性及回收能力，可以降低介耗10％以上。
The invention provides a process for reducing the consumption of heavy medium in a coal preparation plant based on separate treatment by split flow. It mainly includes the following steps: after the raw coal is sorted by the heavy medium, the product enters the de-intermediation screen; the first section of the de-intermediation screen becomes the qualified medium, and the latter section becomes the dilute medium; the dilute medium enters the dilute medium barrel; The medium barrel, a part of which is dispersed by the demagnetizer, enters the qualified medium magnetic separator; the qualified medium magnetic separator concentrates into the qualified medium barrel, and the tailings enter the dilute medium barrel; the thin medium barrel material enters the dilute medium magnetic separator; the dilute medium magnetic separation The machine concentrate is returned to the qualified medium barrel, and the tailings enter the coal slurry water treatment process. The characteristics of the invention are that the magnetic agglomeration of the medium is eliminated by setting a demagnetizer to create favorable conditions for subsequent recovery, the qualified medium is treated with a magnetic separator to improve the stability of the medium recovery link, and the adoption of this process increases the stability and recovery of the medium recovery process. ability, can reduce the dielectric consumption by more than 10%.
Description
Technical field
The invention belongs to dense-medium separation fields, are related to heavy medium coal preparation process dielectric film filter technique, in particular to a kind of base
The technique that coal preparation plant's dense media consumes is reduced in shunting individually processing.
Background technique
Heavy medium sorting process is the prevailing technology of current coal preparation plant, and there are about 70% raw coal to pass through heavy medium sorting process
Processing.The advantage that dense medium separation has precision high, high-efficient, treating capacity is big, the following ratio in coal preparation plant are higher and higher.
Dense media consumption is the main consumption raw material of coal separation production process, accounts for 20% or so of coal preparation plant's processing cost.It is situated between
Matter loss can also bring equipment attrition, slime water treatment difficulty etc. to adversely affect, therefore reducing dielectric dissipation is always that coal preparation plant is raw
The vital task of production.
Existing dense media mainly passes through de-mediated-magnetic separation process recycling, by the qualified medium under sculping screen sieve
It shunts and dilute medium passes through magnetic separator once whole dense media.
In actual production process, magnetic separator carries the dual role of desliming and dielectric film filter, simultaneously using a magnetic separation
Realize that the difficulty of desliming and recycling is larger.
Due to causing medium to generate magnetization by magnetic separation repeatedly-sorting circulation in actual production process.It is especially qualified
Medium content is higher in medium shunt, is easy to produce magnetic coagulation phenomenon, is unfavorable for the recycling of dense media, and in current production link
In do not paid attention to.
The purpose that qualified medium shunts is that the extra coal slime removed in dense medium suspension liquid keeps dielectric stability, magnetic separation task
In desliming main object be qualified medium shunt.It should consider individually to handle qualified medium shunting, using magnetic separation desliming, reduce
The pressure of magnetic separator in prior art.
In addition shunt volume size often fluctuates in production, causes existing magnetic separator pan feeding stability poor, recovering effect is not
Stablize.Individually processing qualified medium shunts the stability for also advantageously improving dielectric film filter system.
Therefore as can demagnetizing in process of production to the qualified medium in prior art, list after magnetic coagulation phenomenon is eliminated
It is solely handled, forms qualified medium and the parallel recovery process of dilute medium, dense media recycling ability on the one hand can be improved, it is also right
Stable suspension density guarantees that dense medium sorting link stabilization plays positive effect.
Summary of the invention
It is difficult to realize that desliming, recycling, magnetic coagulation and the fluctuation of qualified medium shunt volume are drawn simultaneously for prior art magnetic separator
The problem of dielectric loss risen, the present invention propose to provide the treatment process of independent magnetic separation desliming after the de- magnetic of qualified medium shunting
It is a kind of based on shunting the technique that individually processing reduces the consumption of coal preparation plant dense media.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes, and includes the following steps:
(1) raw coal product after dense medium sorts enters sculping screen；
(2) qualified medium obtained after sculping screen is handled is split into two strands, one enters qualified medium bucket, another stock
Enter qualified medium magnetic separator after demagnetizer is handled；The dilute medium obtained after sculping screen is handled enters dilute medium bucket, dilute
Medium bucket material enters dilute medium magnetic separator；
(3) qualified medium magnetic separator and dilute medium magnetic separator concentrate return to qualified medium bucket.Dilute medium magnetic separator tailings into
Enter slime water treatment technique.
Preferred: the qualified medium for branching to demagnetizer accounts for the 20%- of the qualified medium obtained after sculping screen is handled
40%.Specifically adjusted according to slime content and bucket position height.
Preferred: the demagnetizer is that pipeline passes through formula.
Preferred: the demagnetizer is pulse demagnetizer or Constant charge soil demagnetizer.
Preferred: the magnetic field strength of the qualified medium magnetic separator is lower than the magnetic field strength of dilute medium magnetic separator.Be conducive to
Guarantee desliming effect, magnetic field strength height is easy to cause concentrate to carry excessive coal slime secretly.
Preferred: the magnetic field strength of the qualified medium magnetic separator is 1000GS-1200GS, the magnetic field of dilute medium magnetic separator
Intensity is 1500-1800GS.
Preferred: the revolving speed of the qualified medium magnetic separator is higher than the revolving speed of dilute medium magnetic separator.Advantageously ensure that desliming
Effect, revolving speed is low to be easy to cause concentrate to carry excessive coal slime secretly.
Preferred: the revolving speed of the qualified medium magnetic separator is 15-20r/min, and the revolving speed of dilute medium magnetic separator is 6-
12r/min。
Preferred: the qualified medium magnetic separator tailings gravity flow enters dilute medium bucket or gravity flow enters dilute medium magnetic separator.
The utility model has the advantages that qualified medium shunting is carried out the de- independent magnetic separation recovery of magnetic-by the present invention, de- magnetic makes ore pulp dispersion degree
It rises to dielectric film filter and good condition is provided, the efficient desliming of the weaker magnetic field strength of use, medium directly returns to sorting after desliming
Link, dilute medium magnetic separator use stronger magnetic field strength high efficiente callback medium.Individually being handled by qualified medium realizes height
Imitate desliming, recycling.Dielectric loss is effectively reduced, and easy to implement.
The method can effectively reduce the consumption of magnetite powder through the invention, economize on resources, and fluctuate to production process suitable
Answering property is good, additionally assists in raising stability of suspension.
Detailed description of the invention
Fig. 1 is the method for the invention flow diagram；
Fig. 2 is process flowsheet of coal preparation in the prior art；
Fig. 3 is the method for the invention embodiment process flowsheet of coal preparation；
Figure label: A- sculping screen；B- qualified medium bucket；The dilute medium bucket of C-；D- qualified medium barrel pump；The dilute medium bucket of E-
Pump；F- demagnetizer；The dilute medium magnetic separator of G-；H- qualified medium magnetic separator.
Specific embodiment
In order to be readily appreciated that the technology of the present invention method, specific example is used now in conjunction with attached drawing, to technical side of the invention
Case is described.It is to be noted that embodiment described herein is only section Example of the invention, and non-present invention is complete
Portion's implementation acts on and is only to provide the mode for understanding that the content of present invention is more simple and clear for auditor and the public, and
It is not the limitation to technical solution of the present invention.Without departing from the inventive concept of the premise, all ordinary skills
Personnel do not make creative work with regard to thinkable other embodiment, and the simple replacement of other pairs of technical solution of the present invention
And various change, belong to protection scope of the present invention.
As shown in Figure 1, the invention mainly comprises the following steps:
Raw coal is divided into cleaned coal, middle coal, spoil product pumped to three products heavy medium cyclone.Cleaned coal needs to divide
Stream.Head coal product enters sculping screen A；
Sculping screen A leading portion sieve is lower to become qualified medium, and back segment sieve is lower to become dilute medium；
Dilute medium enters dilute medium bucket C；
Qualified medium is by being split into two strands, one enters qualified medium bucket B, and it is laggard that another stock-traders' know-how crosses demagnetizer F processing
Enter qualified medium magnetic separator H；
Qualified medium magnetic separator H concentrate enters qualified medium bucket B, and tailing enters dilute Jie's bucket C or is directly entered dilute medium magnetic
Select machine G；
Dilute medium bucket C material enters dilute medium magnetic separator G；
Dilute medium magnetic separator G concentrate returns to qualified medium bucket B, and tailing enters slime water treatment technique.
Qualified medium is squeezed into dense medium cyclone by qualified medium barrel pump D, and dilute medium barrel pump E squeezes into dilute medium bucket C material
Dilute medium magnetic separator G.
Attached drawing 2 is a typical process coal preparation flowsheet in the prior art
The coal preparation plant is 2.40Mt/a Oversized Coking Coal Cleaning Plant, and granularity is down to 50mm, raw coal warp by closed circuit crushing by raw coal
Crossing desliming screen (0.5mm), its oversize enters mixing tank afterwards, pumped to three products heavy medium cyclone be divided into cleaned coal, in
Coal, spoil product.Three products respectively enter respective sculping screen.
Sculping screen leading portion is qualified medium section, sieves lower qualified medium a part and enters qualified medium bucket, in addition shunts gravity flow
Into dilute medium bucket.Back segment is dilute medium section, and dilute medium enters the dilute Jie's bucket of cleaned coal, dilute medium under middle coal, spoil sieve under cleaned coal sieve
It is combined into the dilute Jie's bucket of middle cash.
Sculping screen sieves upper cleaned coal, middle coal becomes final products after respectively enteing centrifuge dehydration, and spoil is expelled directly out on sieve.
Material is pumped up into mixing tank in qualified medium bucket, and the dilute medium of cleaned coal is pumped up to be rolled into 2 cleaned coal diameter 1200mm
Drum magnetic separator recovering medium, the dilute medium of middle coal, spoil are pumped into cash magnetic separator recovery medium in 2 diameter 1200mm.Magnetic separation
Machine magnetic field strength is 1500GS, revolving speed 10r/min.
The gravity flow of magnetic separator concentrate returns to qualified medium bucket, and tailing gravity flow enters coal slime bucket and feeds subsequent slime water treatment ring
Section.
Attached drawing 3 is based on the process flow chart for shunting individually processing reduction coal preparation plant's dense media consumption.
In scheme of the present invention, a kind of form of implementation is newly-increased 2 LTC-273 Constant charge soil demagnetizers and 2 diameters
1200mm cylinder magnetic separator.
LTC-273 Constant charge soil demagnetizer is mounted on cleaned coal, in middle cash qualified medium shunt conduit.It is fed respectively after processing straight
Diameter 1200mm cylinder magnetic separator, magnetic field strength 1200GS, revolving speed 15r/min.
Qualified medium shunts magnetic separator concentrate and enters qualified medium bucket, and tailing enters dilute medium bucket.
In scheme of the present invention, another form of implementation is only to increase 2 LTC-273 Constant charge soil demagnetizers newly.By existing 2
Individually processing qualified medium shunts any one of diameter 1200mm cylinder magnetic separator.
LTC-273 Constant charge soil demagnetizer is mounted on cleaned coal, in middle cash qualified medium shunt conduit.It is fed respectively after processing straight
Diameter 1200mm cylinder magnetic separator, adjustment revolving speed are 15r/min.
Qualified medium shunts magnetic separator concentrate and enters qualified medium bucket, and tailing enters dilute medium bucket.
The actual measurement of magnet mineral content is 1.2-1.5g/l in coal preparation plant's prior art cleaned coal, middle cash magnetic separator tailings, is implemented
1.0g/l can be reduced to after the present invention program hereinafter, prior art consumption reduction can be made to reduce by 10% or more using this programme.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135651.6A CN109201319B (en) | 2018-09-28 | 2018-09-28 | It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135651.6A CN109201319B (en) | 2018-09-28 | 2018-09-28 | It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes |
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| Publication Number | Publication Date |
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| CN109201319A true CN109201319A (en) | 2019-01-15 |
| CN109201319B CN109201319B (en) | 2019-11-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508393A (en) * | 2019-08-26 | 2019-11-29 | 中国矿业大学 | A method for reducing the carrying medium of products in a dense medium coal preparation plant |
| CN111229447A (en) * | 2020-01-20 | 2020-06-05 | 肇庆市大正铝业有限公司 | A kind of method and system for removing impurities by flotation of secondary aluminum resources |
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|---|---|---|---|---|
| CN110508393A (en) * | 2019-08-26 | 2019-11-29 | 中国矿业大学 | A method for reducing the carrying medium of products in a dense medium coal preparation plant |
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| CN111229447A (en) * | 2020-01-20 | 2020-06-05 | 肇庆市大正铝业有限公司 | A kind of method and system for removing impurities by flotation of secondary aluminum resources |
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| CN109201319B (en) | 2019-11-05 |
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Granted publication date: 20191105 |