CN110052421A - A kind of coal mine method for separating based on X-ray sensing - Google Patents
A kind of coal mine method for separating based on X-ray sensing Download PDFInfo
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- CN110052421A CN110052421A CN201910355805.0A CN201910355805A CN110052421A CN 110052421 A CN110052421 A CN 110052421A CN 201910355805 A CN201910355805 A CN 201910355805A CN 110052421 A CN110052421 A CN 110052421A
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- coal
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- mineral aggregate
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- metallic ore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/3416—Sorting according to other particular properties according to radiation transmissivity, e.g. for light, x-rays, particle radiation
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- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of coal mine method for separating based on X-ray sensing, comprising the following steps: step 1 provides mineral aggregate using material conveying device for sorting；Step 2 carries out roughing to mineral aggregate, to sieve to cleaned coal, middle coal, spoil and the metallic ore in mineral aggregate, separates spoil, obtains cleaned coal, impure middle coal and metallic ore；Step 3, the mineral aggregate progress obtained to step 2 is selected, to sort to cleaned coal, impure middle coal and the metallic ore in mineral aggregate；Step 4, the cleaned coal that step 3 is obtained carries out purification sorting, to obtain cleaned coal.In coal mine method for separating based on X-ray sensing of the invention, by carrying out multipass sort to mineral aggregate, mineral aggregate is made full use of in order to classify, dusting cover and fine screen are carried out for the coal mine of primary dcreening operation, to obtain the mineral aggregate of different quality level, the high quality coal mine obtained through dusting cover meets the needs of high quality industrial coal.
Description
Technical field
The invention belongs to mineral separation technical field more particularly to a kind of coal mine method for separating of multi-layer high accuracy.
Background technique
Coal is a kind of flammable black or brownish black sedimentary rock, such sedimentary rock be commonly done in referred to as coal bed or
In the lithostratigraphy in coal seam or in mineral ore.Because being exposed under raised temperature and pressure later, the coal of harder form can be with
It is considered as metamorphic rock, such as anthracite.Most of bituminous coal and anthracite utilize acquired by depth coal-mining method, and modern technology
Strip coal mining can be used.Strip coal mining need to employ the earthmover that can remove hundreds of metric tons per hour, remove hundreds of
The surface soil layer of foot depth.It, can welding landscape although cost is relatively low and comparatively fast digs speed.General depth coal-mining method it
Depth is hundreds of Foot to thousands of Foot, it usually needs several straight wells are divulged information as tunnel, are taken methane away and are reduced the heat of pit inside
With humidity.The coalfield of about 90 ﹪ or more is mined and is conveyed using mechanical system, thus the transport in tunnel relies primarily on conveying
Band, is delivered to straight well for coal, then sends out ground again and the processing such as is cleaned, classified.
The quality of coal mine determines its service efficiency and economic value.The coal mine of nature is deposited in a variety of forms
Usually it is being combined together with some impurity that will affect coal mine quality.In order to these impurity be removed from coal mine to improve
Quality, frequently with wet dressing and dry mineral processing technology.
It is needed in wet dressing technology using a large amount of water, costly and have serious side effect to environment, water increases simultaneously
The humidity for having added coal mine influences the calorific value efficiency of coal mine, thus gradually by dry mineral processing technical substitution.
However, existing dry mineral processing technology only has the relatively simple road 1-2 screening process, screening means are also more general
It is logical, the technology of preliminary screening is mostly carried out to coal mine, is not able to satisfy the requirement that high-precision screening prepares cleaned coal, can not be reached more
Level screening is to prepare the coal mine of different quality level and the purpose of sufficiently recycling valuable mineral.
Summary of the invention
To solve above-mentioned the problems of the prior art, the present invention provides a kind of coal mine sorting sides based on X-ray sensing
Method should have screening accuracy height, good separation effect, simple process, operating cost based on the coal mine method for separating that X-ray senses
The features such as low, can be provided for user purity is high, high-quality cleaned coal, while can centering coal, impurity and metallic ore rationally divided
Choosing.
To achieve the above object, the specific technical solution of the coal mine method for separating of the invention based on X-ray sensing is as follows:
A kind of coal mine method for separating based on X-ray sensing, comprising the following steps: step 1 is provided using material conveying device
Mineral aggregate is for sorting；Step 2 carries out roughing to mineral aggregate, to carry out to cleaned coal, middle coal, spoil and the metallic ore in mineral aggregate
Screening separates spoil, obtains cleaned coal, impure middle coal and metallic ore；Step 3 carries out essence to the mineral aggregate that step 2 obtains
Choosing, to be sorted to cleaned coal, impure middle coal and the metallic ore in mineral aggregate；Step 4, the cleaned coal that step 3 is obtained carry out
Purification sorting, to obtain cleaned coal；Wherein in step 3, using X-ray emitter, X-ray detector group, executing agency with
And electronic control unit sorts impure middle coal and impure metallic ore, to obtain cleaned coal.
Further, in step 3, X-ray emitter generate X-ray pass through mineral aggregate, X-ray detector group detection across
Detectable signal is simultaneously passed to electronic control unit by the X-ray of mineral aggregate, and electronic control unit calculates the X-ray absorption for penetrating mineral aggregate
It is worth, the X-ray absorption threshold value of cleaned coal is set in electronic control unit, electronic control unit compares is inhaled by the X-ray of calculating
The X-ray absorption threshold value of receipts value and setting sorts impure middle coal and impure metallic ore, to obtain cleaned coal.
Further, X-ray emitter be arranged in material conveying device transmission mineral aggregate above, X-ray emitter on to
Under with sharp angle irradiate mineral aggregate.
Further, the sharp angle is 35-55 degree.
Further, in step 3, it is affiliated set X-ray absorption threshold value as X-ray pass through unit thickness cleaned coal when X penetrate
Line absorption value.
Further, in step 3, when setting X-ray absorption threshold value and the difference for detecting X-ray absorption value are greater than setting X
Radiation absorption threshold value 20% when, electronic control unit control executing agency separate impure middle coal and impure metallic ore,
To obtain cleaned coal.
Further, in step 4, setting X is located to setting X-ray absorption threshold value and the difference for detecting X-ray absorption value
Cleaned coal within the scope of the 5-20% of radiation absorption threshold value carries out transmission imaging analysis, and the pixel particle of coal substance non-in coal mine is believed
Breath polymerization, obtains the impurity component ratio in entire particle, the mineral aggregate of higher impurity ratio is separated from cleaned coal, thus
Completion purifies cleaned coal from cleaned coal.
It further, further include step 5, in step 5, by impure middle coal isolated in step 3 and containing miscellaneous
The metallic ore of matter is sorted again, with coal and metallic ore in separation, is penetrated when separation using the gamma that gamma ray radiation source issues
Coal and metallic ore in line direction drive by gamma ray radiation to the difference of the absorption quality factor of coal substance and mineral portion
Dynamic executing agency sorts middle coal and metallic ore.
Further, further include step 6, in step 6, middle coal crushed with pulverizer and generates coal dust and impurity particle,
Coal dust and impurity particle are separated using centrifuge, then by coal dust filters pressing at coal cinder.
It further, further include that broken process is carried out to mineral aggregate in step 1, to obtain the mineral aggregate block of uniform particle sizes,
Broken mineral aggregate is provided by material conveying device for sorting；In step 2, using weight measurement instrument and volume measuring instrument
Mineral aggregate is detected, calculate the density of mineral aggregate using PLC logic control element and is executed according to the mineral aggregate density-driven of calculating
Mechanism sorts cleaned coal, middle coal, spoil and metallic ore.
In coal mine method for separating based on X-ray sensing of the invention, by carrying out multipass sort to mineral aggregate, in order to divide
Class makes full use of mineral aggregate, dusting cover and fine screen is carried out for the coal mine of primary dcreening operation, so that the mineral aggregate of different quality level is obtained, through dusting cover
Obtained high quality coal mine meets the needs of high quality industrial coal.At the same time, it is selected in different screening processes different
Screening installation, reasonable disposition screening installation save screening technology operating cost, to generate considerable economic and social benefit.
Detailed description of the invention
Fig. 1 is the flow chart of the coal mine method for separating sensed the present invention is based on X-ray.
Specific embodiment
In order to be best understood from the purpose of the present invention, structure and function, with reference to the accompanying drawing, penetrated to of the invention based on X
The coal mine method for separating of line sensing does further detailed description.
As shown in Figure 1, it is of the invention based on X-ray sensing coal mine method for separating the following steps are included:
Step 1 provides mineral aggregate using material conveying device for sorting.
Step 2 carries out roughing to mineral aggregate, to sieve the cleaned coal in mineral, middle coal, spoil and metallic ore.
The primary mineral aggregate of coal mining is the mixture of the compositions such as a large amount of cleaned coal, middle coal, spoil and metallic ore, right
When primary mineral aggregate carries out selected, the preliminary screening of simple and inexpensive is first carried out to primary mineral aggregate, conveniently to first in downstream procedures
Primary mineral aggregate after sieve is finely sieved.In primary mineral aggregate, the density of the materials such as cleaned coal, middle coal, spoil and metallic ore
To be sequentially increased.
It is carried out in rougher process to mineral aggregate, it is preferred to use relatively inexpensive physically method for sieving can also be used existing
There are the other methods in technology.In the present embodiment, mineral aggregate passes through batcher, such as oscillating feeder and first material transmission device
It is transmitted, weight measurement instrument and volume measuring instrument, weight measurement instrument and cubing is provided on first material transmission device
Instrument to the mineral aggregate that is transmitted with first material transmission device carry out weight and volume measurement, weight measurement instrument and volume measuring instrument with
PLC logic control element is connected, and PLC logic control element is also connected with executive module, weight measurement instrument and volume measuring instrument pair
Mineral aggregate transmits a signal to PLC logic control element after measuring, and the close of mineral aggregate is calculated in PLC logic control element
Degree, PLC logic control element mark mineral aggregate according to the density range of the cleaned coal of setting, middle coal, spoil and metallic ore
It is fixed, and transmit a signal to the first executing agency.First executing agency according to PLC logic control element transmit come control signal,
Cleaned coal, middle coal, spoil and metallic ore are sorted.
Specifically, first material transmission device includes multiple Transfer pipes, may be provided on each Transfer pipe and is respectively provided with
There are weight measurement instrument and volume measuring instrument.Substitution, weight measurement is respectively set in the upper semisection and lower semisection of each Transfer pipe
Instrument and volume measuring instrument.Above-mentioned first executing agency can be used conventional mechanical driving mechanism, such as the first executing agency can be with
It is to take motor-driven separating plate by private, cleaned coal, middle coal, spoil and metallic ore etc. is sieved.Primary mineral aggregate is through step
After a rapid screening, cleaned coal is obtained, coal in part, and be mingled with the spoil and metallic ore of other light impurities on a small quantity.
Step 3, it is selected to mineral aggregate progress, to sieve the cleaned coal in mineral aggregate, impure middle coal and metallic ore.
In the preliminary screening of step 1, coal in spoil, part is separated from primary mineral aggregate, to obtain quality
More preferable purer quality fine coal, needs further to screen mineral aggregate, to separate impure middle coal and metallic ore therein.Mine
Material is transmitted to the second material transmission device in step 2, second material transmission dress from the first material transmission device in step 1
It sets and is provided with X-ray emitter, X-ray detector group and electronic control unit, the electronic control unit and X-ray are visited
It surveys device group and passes and be connected, electronic control unit is also connected with the second executing agency, and electronic control unit receives X-ray detector group and passes
The signal passed simultaneously after signal processing transmits the second executing agency and executes command signal.
Specifically, X-ray emitter can produce the X-ray across mineral aggregate, which detects across mineral aggregate
The X-ray transmission signal detected is passed to electronic control unit by X-ray, X-ray detector group, and electronic control unit calculates
Penetrate the X-ray absorption value or percent transmission of mineral aggregate.The X-ray absorption threshold value of cleaned coal, the X are set in electronic control unit
Radiation absorption threshold value is preferably the X-ray absorption threshold value of mining site actual measurement cleaned coal, such as the actual measurement average value of multiple cleaned coal.Electronics control
Unit processed compares the X-ray absorption threshold value of the actual measurement X-ray absorption value and setting that calculate by X-ray detector group, with sorting
Cleaned coal, impure middle coal and metallic ore in mineral aggregate.
Specifically, when the difference of the X-ray absorption threshold value and actual measurement X-ray absorption value that detect setting is greater than 20%, electricity
Sub-control unit controls the second executing agency, and coal or impure metallic ore in separation retain cleaned coal.In step 2, second
Executing agency is preferably the executing agency of quick response, such as solenoid valve, electromagnetism snifting valve, when the X-ray for detecting setting is inhaled
(difference and setting X-ray are inhaled when receiving threshold value and surveying the difference of X-ray absorption value greater than set X-ray absorption threshold value 20%
Receive the ratio of threshold value), impure middle coal and metallic ore are isolated second by electronic control unit control activation solenoid valve, solenoid valve
Material conveying device.
Above-mentioned X-ray emitter be arranged in material conveying device transmission mineral aggregate above, X-ray emitter from the top down with
Sharp angle irradiates mineral aggregate, and sharp angle is preferably 35-55 degree.
It should be noted that above-mentioned X-ray absorption threshold value is preferably X-ray absorption when X-ray passes through unit thickness cleaned coal
Threshold value.Corresponding, actual measurement X-ray absorption value is also the actual measurement X-ray absorption value of unit thickness mineral aggregate.For this purpose, it is preferred that in step
Mineral aggregate crushing operation process is first carried out before one, has obtained the mineral aggregate particle of uniform thickness.It alternatively, can also be in second material
Thickness transducer is set on transmission device, and thickness transducer is connected with electronic control unit, in order to electronic control unit calculating
The actual measurement X-ray absorption value of unit thickness mineral aggregate.
Step 4 is penetrated for detecting that setting X-ray absorption threshold value and the difference for surveying X-ray absorption value are located at setting X
The cleaned coal that cleaned coal namely step 2 within the 20% of line absorption threshold value obtain, also needs further progress sorting process, into obtaining
The cleaned coal of high-quality, to meet the industrial requirement to high quality coal mine.The cleaned coal that step 2 is obtained is transmitted to third material biography
Device is sent, it is selected again to cleaned coal progress on third material conveying device, to sub-elect quality fine coal and secondary cleaned coal.
In the cleaned coal that step 3 obtains, it is for setting X-ray absorption threshold value and detects the difference of X-ray absorption value
Cleaned coal within the 20% of setting X-ray absorption threshold value, wherein there are still the situation that some coal mines are mingled with many impurity, folder
In the miscellaneous coal mine for having impurity, the distributed areas of impurity are different, in addition the limitation of the X-ray angle of X-ray emitter transmitting,
There are part detection errors.I.e. X-ray just interts pure coal in impure coal mine or the seldom regional area of impurity, causes to detect
Error generates.Therefore, to setting X-ray absorption threshold value and the difference of X-ray absorption value need to be detected positioned at setting X-ray absorption threshold
Cleaned coal within the scope of the 5-20% of value carries out selected again.
Therefore, it in step 4, is set by being located to setting X-ray absorption threshold value with the difference for detecting X-ray absorption value
The cleaned coal determined within the scope of the 5-20% of X-ray absorption threshold value carries out transmission imaging analysis, by the pixel particle of coal substance non-in coal mine
Information fusion obtains the impurity component ratio in entire particle, the mineral aggregate of higher proportion is separated from cleaned coal.
It should be noted that above-mentioned first material transmission device, second material transmission device and third material conveying device can
The different sections or multiple material conveying devices for thinking same material device are connected.As long as meeting material transmission,
It will not go into details for this.
Further, further include step 5, in this step, the mineral aggregate separated in step 3 can also be carried out further
Working process.When separation, using coal and metallic ore in the gamma ray direction of gamma ray radiation source sending, penetrated by gamma
Beta radiation drives executing agency to sort middle coal and metallic ore the difference of the absorption quality factor of coal substance and mineral portion.
Specifically, the mineral aggregate separated in step 3 is introduced into another material conveying device, it is right on another material conveying device
The mineral aggregate (i.e. impure middle coal and metallic ore) of step 3 separating treatment is separated again.Such situation is for containing a certain amount of gold
The coal mine for belonging to mineral is even more important.
Impure middle coal and metallic ore enter 4 materials transmission device, are provided with metal detector on material conveying device
With PLC logic control element, PLC logic control element is connected with metal detector, and when metal detector is detected, there are metals
When the mineral of ingredient, the third executing agency of PLC logic control element control will separate in metalliferous mineral therefrom coal.Third
Executing agency can be identical as the first executing agency, using conventional mechanical driving mechanism.
Further, it may also include step 6, in step 6, middle coal crushed with pulverizer and generates coal dust and impurity
Grain after impregnating coal dust and impurity particle, recycles centrifuge to separate coal dust and impurity particle, the impurity particle of hard due to
Density stays in greatly the middle part of centrifugal device, and coal dust slurry is dispersed to peripheral discharge, by filters pressing after coal dust standing and drying at coal cinder.
It is appreciated that the present invention is described by some embodiments, and what those skilled in the art knew, it is not taking off
In the case where from the spirit and scope of the present invention, various changes or equivalence replacement can be carried out to these features and embodiment.Separately
Outside, under the teachings of the present invention, can modify to these features and embodiment with adapt to particular situation and material without
The spirit and scope of the present invention can be detached from.Therefore, the present invention is not limited to the particular embodiment disclosed, and is fallen with
Embodiment within the scope of claims hereof belong to the present invention protect in the range of.
Claims (10)
1. a kind of coal mine method for separating based on X-ray sensing, which comprises the following steps:
Step 1 provides mineral aggregate using material conveying device for sorting；
Step 2 carries out roughing to mineral aggregate, to be sieved to cleaned coal, middle coal, spoil and the metallic ore in mineral aggregate, separation
Spoil obtains cleaned coal, impure middle coal and metallic ore；
Step 3, the mineral aggregate progress obtained to step 2 is selected, to carry out to cleaned coal, impure middle coal and the metallic ore in mineral aggregate
Sorting；
Step 4, the cleaned coal that step 3 is obtained carries out purification sorting, to obtain cleaned coal；
Wherein in step 3, using X-ray emitter, X-ray detector group, executing agency and electronic control unit to containing
The middle coal and impure metallic ore of impurity are sorted, to obtain cleaned coal.
2. the coal mine method for separating according to claim 1 based on X-ray sensing, which is characterized in that it is characterized in that,
In step 3, X-ray emitter generates X-ray and passes through mineral aggregate, and X-ray detector group detects the X-ray across mineral aggregate and will visit
It surveys signal and passes to electronic control unit, electronic control unit calculates the X-ray absorption value for penetrating mineral aggregate, in electronic control unit
It is set with the X-ray absorption threshold value of cleaned coal, electronic control unit compares through the X-ray absorption value of calculating and the X-ray of setting
Threshold value is absorbed, impure middle coal and impure metallic ore are sorted, to obtain cleaned coal.
3. the coal mine method for separating according to claim 2 based on X-ray sensing, which is characterized in that X-ray emitter is set
It sets above the mineral aggregate of material conveying device transmission, X-ray emitter irradiates mineral aggregate from the top down with sharp angle.
4. the coal mine method for separating according to claim 3 based on X-ray sensing, which is characterized in that the sharp angle
For 35-55 degree.
5. the coal mine method for separating according to claim 2 based on X-ray sensing, which is characterized in that in step 3, institute
Belong to set X-ray absorption threshold value as X-ray across unit thickness cleaned coal when X-ray absorption value.
6. the coal mine method for separating according to claim 5 based on X-ray sensing, which is characterized in that in step 3, when
When setting X-ray absorption threshold value and detecting the difference of X-ray absorption value greater than set X-ray absorption threshold value 20%, electronic control
Unit control executing agency separates impure middle coal and impure metallic ore, to obtain cleaned coal.
7. the coal mine method for separating according to claim 6 based on X-ray sensing, which is characterized in that right in step 4
It sets X-ray absorption threshold value and detects the difference of X-ray absorption value within the scope of the 5-20% of setting X-ray absorption threshold value
Cleaned coal carries out transmission imaging analysis, and the pixel particle information of coal substance non-in coal mine is polymerize, the impurity in entire particle is obtained
Component ratio separates the mineral aggregate of higher impurity ratio from cleaned coal, to complete to purify cleaned coal from cleaned coal.
8. the coal mine method for separating according to claim 1 based on X-ray sensing, which is characterized in that it further include step 5,
In step 5, isolated impure middle coal and impure metallic ore in step 3 are sorted again, with separation
Middle coal and metallic ore, when separation using the gamma ray that gamma ray radiation source issues be directed toward in coal and metallic ore, pass through gamma
For ray radiation to the difference of the absorption quality factor of coal substance and mineral portion, driving executing agency divides middle coal and metallic ore
Choosing.
9. the coal mine method for separating according to claim 8 based on X-ray sensing, which is characterized in that it further include step 6,
In step 6, middle coal is crushed with pulverizer and generates coal dust and impurity particle, is divided coal dust and impurity particle using centrifuge
From, then by coal dust filters pressing at coal cinder.
10. the coal mine method for separating according to claim 1 based on X-ray sensing, which is characterized in that in step 1,
It further include that broken process is carried out to mineral aggregate, to obtain the mineral aggregate block of uniform particle sizes, broken by material conveying device offer
Mineral aggregate is for sorting；In step 2, mineral aggregate is detected using weight measurement instrument and volume measuring instrument, utilizes PLC logic
Control unit calculates the density of mineral aggregate and according to the mineral aggregate density-driven executing agency of calculating to cleaned coal, middle coal, spoil, Yi Jijin
Belong to mine to be sorted.
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| CN114515705A (en) * | 2021-12-14 | 2022-05-20 | 中煤科工集团信息技术有限公司 | Coal gangue sorting system based on multi-mode imaging analysis |
| CN114841272A (en) * | 2022-05-09 | 2022-08-02 | 山西理工智联科技有限公司 | X-ray coal quality multi-element-based coal blending classification modeling method |
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