CN110465399A - A kind of preparation method and separation equipment of low clay content raw limestone - Google Patents

A kind of preparation method and separation equipment of low clay content raw limestone Download PDF

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Publication number
CN110465399A
CN110465399A CN201910687249.7A CN201910687249A CN110465399A CN 110465399 A CN110465399 A CN 110465399A CN 201910687249 A CN201910687249 A CN 201910687249A CN 110465399 A CN110465399 A CN 110465399A
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wind
clay content
raw limestone
lime stone
low clay
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CN110465399B (en
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张电
薛群虎
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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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
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • 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
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

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Abstract

The invention discloses the preparation methods and separation equipment of a kind of low clay content raw limestone, the preparation method of low clay content raw limestone, include: S1: vibration material delivering makes the silt of lime stone surface to be processed fall off to form mobile mixture containing silt, fair current wind is carried out to mobile mixture containing silt to wash, and generates wind band dust and gravel lime stone mixing；S2: wind band dust of the partial size less than 0.5mm is separated by bag-type dust；The wind band dust that partial size is 0.5~1.5mm passes through gravity settling separation；S3: the lime stone and gravel that the removal of gravel lime stone mixing is less than Particle size requirements are up to low clay content raw limestone；Or gravel lime stone mixing is successively removed again less than the lime stone of Particle size requirements and gravel after S1 and S2 more times processing up to low clay content raw limestone again.The sediment content of raw limestone is down to 0.20% hereinafter, hundred tons of average current drain 35kWh, are lower than washing cost.

Description

A kind of preparation method and separation equipment of low clay content raw limestone
Technical field
The invention belongs to inorganic non-metallic raw material and preparation field, specially a kind of preparation of low clay content raw limestone Method and separation equipment.
Background technique
Desulfurization dephosphorization active lime used in particulate metal smelting, active lime raw material used in calcium carbide production, salt Lake water extracts the lime precipitation agent etc. that high-purity magnesium oxide uses and requires purity, the higher lime of activity.For example, salt lake saline extracts The lime precipitation agent that high-purity magnesium oxide uses, 1 ton of magnesia of every production need the lime of 2.5 tons of lime stones production, in lime stone Certain impurity in magnesium hydrate precipitate its also precipitate simultaneously, therefore, the impurity content of lime stone decides salt lake highly-purity magnesite Purity.Impurity content can produce the magnesia that content of magnesia is greater than 98%, work as limestone-impurities less than 0.2% in lime stone Content is greater than 0.5%, can only produce the magnesia that content of magnesia is no more than 96.8%.Limestone-impurities content extracts salt lake saline High-purity magnesium oxide impurities affect is obviously.The raw limestone requirement sediment content that calcium carbide factory's production lime uses cannot More than 1.5%.
High-purity fat lime is produced, in addition to the chemical composition purity of lime stone itself wants height, in exploitation, shattering process Mountain skin, the loess brought into are also the principal element for influencing its purity.Mountain skin, the loess in raw material are removed, simplest method is Washing, but in western areas of serious, washing process is difficult to realize.
Summary of the invention
For electric power resources in the West, abundant but serious water shortage regional lime stone silt is difficult to realize the characteristics of washing desilts, The present invention replaces water using multistage wind washing method, with electric power, removes the loess adhered to and the mountain skin of entrainment in raw limestone, mentions The preparation method and separation equipment of a kind of low clay content raw limestone are supplied.
In order to realize that above-mentioned task, the present invention take following technical solution, this method comprises:
A kind of preparation method of low clay content raw limestone, comprising: S1: vibration material delivering makes lime stone surface to be processed Silt fall off to form mobile mixture containing silt, fair current wind is carried out to mobile mixture containing silt and is washed, wind band dirt is generated Soil and gravel lime stone mixing；S2: wind band dust of the partial size less than 0.5mm is separated by bag-type dust；Partial size be 0.5~ The wind band dust of 1.5mm passes through gravity settling separation；S3: the removal of gravel lime stone mixing is less than the lime stone and sand of Particle size requirements Gravel is up to low clay content raw limestone；Or gravel lime stone mixing is successively gone after S1 and S2 more times processing again again Except the lime stone and gravel for being less than Particle size requirements are up to low clay content raw limestone.
Optionally, the wind pressure that the fair current wind is washed is 67~74kPa, 620~710m of wind flow that fair current wind is washed3/ h, The distinguished and admirable speed that fair current wind is washed is 12.1~13.5m/s.
Optionally, seal lime building stones formation material to be processed, the wind for washing fair current wind Only flowed along the direction that dust-laden mixture moves；Gravel lime stone mixing forms material sealing in discharging；Described is to be processed The natural packing voidage of lime building stones is greater than 36%.
Optionally, the tilt angle of the vibration material delivering is 18~22 °；Wind direction that fair current wind is washed and vibration material delivering incline Angle between inclined-plane is 28~32 °.
Optionally, the vibration frequency of the vibration material delivering is 25Hz, 18~22kN of exciting force.
A kind of separation equipment of low clay content raw limestone, includes at least force one wind washing cylinder, and the wind washing cylinder includes High-pressure blast nozzle is arranged in the vibration material delivering section in feed inlet, vibration material delivering section, discharge port and the air outlet being sequentially communicated； The feed inlet is longitudinally disposed, and air outlet is transversely arranged, and vibration material delivering section transition connects feed inlet and air outlet inclination Setting；The draw ratio of the vibration material delivering section is 9.5~13.5.
Optionally, height H=1200~1500mm of feed inlet, also installs the first material-height exploring on the feed inlet Device and the second material level detector, the first material level detector are mounted on the oral area of feed inlet, the second material level detector be mounted on away from into At 360~450mm of material mouth oral area.
Optionally, the inclination angle alpha of the vibration material delivering section is 18~22 °, and the high-pressure blast nozzle and vibration are defeated Expect that the axis angle β of section is 28~32 °.
Optionally, the first vibrator is set on the feed inlet, the second vibration is set in the vibration material delivering section Dynamic device.
Optionally, bag-type dust split tunnel and gravity settling separation channel are set gradually along longitudinal direction；The air outlet (3) it is connected to bag-type dust split tunnel and gravity settling separation channel；Discharge port is connect with slide sieve or discharge port and multistage wind Washing cylinder connection；Slide sieve and gravity settling separation channel are connect with screw(-type) feeder respectively.
Compared with the prior art, the advantages of the present invention are as follows:
It can solve the problems, such as that western serious water shortage mountain area lime stone cannot achieve washing except silt.It is abundant using western part The renewable electric power resource of wind, light replaces water with electricity, saves valuable water resource, produce low sediment content raw limestone, realizes Mineral resources increment.Production technology wind is washed simpler than washing, and wind washes that technique occupied area is small, and feed throughput is big, production cost It is low.Two-part wind is washed, and the raw limestone that sediment content is lower than 0.20% can be produced.Requirement according to user to sediment content, More multistage wind can be achieved and wash technique.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the separation equipment of low clay content raw limestone of the invention；
Each label indicates in figure are as follows: 1- feed inlet, the first material level detector of 11-, the second material level detector of 12-, 13- first Vibrator, 2- vibration material delivering section, 21- high-pressure blast nozzle, the second vibrator of 22-, 3- air outlet, 4- discharge port, 5- bag-type dust Connector, 6- bag-type dust channel, 7- gravity settling separation channel, 8- slide sieve, 9- screw(-type) feeder；
Arrow in figure indicates the traffic direction of material.
Specific embodiment
The present invention is washed+is sieved mountain skin and loess in the raw material after replacing washing to remove limestone crushing using wind, is reduced Sediment content in raw limestone improves its purity.It is abundant but serious scarce to the composite can be widely applied to electric power resources in the West The area of water.
Fair current purging mentioned in the present invention: refer to that the flow direction (moving direction) of wind direction and material is consistent, fair current Wind, which is washed, to be conducive to dust and separates with particle, while can also further promote the flowing of material, and for dust side that wind is taken away Just the processing of rear end is carried out.
Vibration material delivering in the present invention refers to using vibrating transportation during conveying material, vibration make flitch, material with It is mutually collided between material, the silt of adherency falls off, while the tilt angle for the frequency and air duct vibrated cooperates and gives lime building stones Movement provides power, and vibration can be achieved at the same time without additional power and fall off and conveying.
Wind washes technological equipment using two-part wind washing cylinder, by the inclination angle of diameter and length, wind washing cylinder to wind washing cylinder, into The control of material mouth controlling level and leakproofness, purge wind nozzle selection, the calculating of the parameters such as setting angle, wind pressure, wind speed and flow And optimization, build 5~9cm capable of washing, 2~5cm lime stone wind washes production line.
This method includes washing technique using wind, designs independent two-part wind washing cylinder, closes feed end, is blown by fair current It washes, draws dust-laden wind, the bulky grain silt in dust-laden wind is settled through expansion chamber, and little particle silt is separated through bag filter, by Screw machine excludes.Lime stone after wind is washed is handled through slide sieve again, obtains the extremely low raw limestone of clay content.Wind is washed cost and is lower than Cost is washed, wind washes average hundred tons of power consumptions lower than 35kwh.
Specifically, the preparation method of low clay content raw limestone of the invention, comprising: S1: vibration material delivering makes to be processed The silt of lime stone surface falls off to form mobile mixture containing silt, carries out fair current wind to mobile mixture containing silt It washes, generates wind band dust and gravel lime stone mixing；S2: wind band dust of the partial size less than 0.5mm is separated by bag-type dust；Grain The wind band dust that diameter is 0.5~1.5mm passes through gravity settling separation；S3: the removal of gravel lime stone mixing is less than Particle size requirements Lime stone and gravel are up to low clay content raw limestone；Or gravel lime stone mixing is again successively by S1 and S2 more times processing It is removed again afterwards less than the lime stone of Particle size requirements and gravel up to low clay content raw limestone.
In embodiment of the disclosure, the wind pressure that fair current wind is washed be 67~74kPa, the wind flow 620 that fair current wind is washed~ 710m3/ h, the distinguished and admirable speed that fair current wind is washed is 12.1~13.5m/s.In embodiment of the disclosure, make before vibration material delivering wait locate The sealing of fibrous gypsum ash building stones formation material, the wind for washing fair current wind are only flowed along the direction that dust-laden mixture moves；Gravel lime stone Mixing forms material sealing in discharging, prevents slide sieve separation from generating dust；The natural packing voidage of lime building stones to be processed Greater than 36%.The differential raw limestone of certain particle size refers to that wind washes object and must have certain accumulation gap, and high-pressure blast exists Certain flow velocity must be kept in wind washing cylinder, otherwise high pressure gas can not take away contained silt.The results show: lime stone is former The accumulation voidage of material has to be larger than 36%, is lower than 36%, and as accumulation voidage reduces, high pressure wind resistance is quicklyd increase, electricity Consumption increases；The distinguished and admirable speed that fair current wind is washed has to be larger than 12.1m/s, and otherwise dust can not all be taken out of.
In embodiment of the disclosure, the tilt angle of vibration material delivering is 18~22 °；The wind direction that fair current wind is washed and vibration are defeated Angle between the inclined surface of material is 28~32 °.Vibration material delivering has certain inclination angle, and applying small vibration force can be realized object Collision is rolled between material to glide.The air of certain pressure, certain flow rate is blown into the material of vibration material delivering, air can only be transported along material Line direction flowing is excluded when to next section by air outlet, and facilitates the separating treatment of progress next step.
In embodiment of the disclosure, the vibration frequency of vibration material delivering is 25Hz, 18~22kN of exciting force.Vibration material delivering has Certain inclination angle, applying small vibration force can be realized storeroom rolling collision downslide movement.
In conjunction with Fig. 1, the separation equipment of low clay content raw limestone of the invention includes at least force one wind washing cylinder, and wind is washed Cylinder includes feed inlet 1, vibration material delivering section 2, discharge port 4 and the air outlet 3 being sequentially communicated, and high-pressure blast is arranged in vibration material delivering section 2 Nozzle 21；Feed inlet 1 is longitudinally disposed, and air outlet 3 is transversely arranged, and 2 transition of vibration material delivering section connects feed inlet 1 and air outlet 3 are obliquely installed；The draw ratio of vibration material delivering section 2 is 9.5~13.5.The differential raw limestone of certain particle size is passed through into feed inlet 1 is sent into the vibration material delivering section 2 of wind washing cylinder, is passed through high-pressure blast progress fair current wind by high-pressure blast nozzle 21 and washes, partial size is less than 0.5mm Wind band dust by bag-type dust separation；The wind band dust that partial size is 0.5~1.5mm is by gravity settling separation, through fair current The gravel lime stone mixing that wind is washed after wind is washed further removes the material of bulky grain after slide sieve.The vibration material delivering section 2 of wind washing cylinder Certain draw ratio (L/D) must be kept, the wind of L/D=9.5~13.5 washes efficiency highest, while multistage string can be used in wind washing cylinder Connection, is repeatedly handled material, and the height and the requirement of width equidimension of equipment can be considered in when series connection, lead to series connection or Multi-stage separation treatment may be implemented in differential concatenation.In addition, draw ratio also determines energy consumption of unit product, high pressure blower power, The selection of wind pressure, flow, the setting etc. of wind washing cylinder air outlet wind speed.Result of study shows: force one wind washing cylinder wind is washed, silt removal Efficiency can achieve 80.9%~87.2%, and light breeze washing cylinder wind is washed, and silt removal efficiency can achieve 93.5%~94.8%, Force 3 wind washing cylinder wind is washed, and silt removal efficiency can achieve 94.5%~97.1%.It is lower that three-level with windward washing cylinder wind washes efficiency, Series, and obtained material is purer, but equipment operating cost can increase, so can basis in actual production process Need to carry out flexibly free combination.
In embodiment of the disclosure, height H=1200~1500mm of feed inlet 1, also installs first on feed inlet 1 Material level detector 11 and the second material level detector 12, the first material level detector 11 are mounted on the oral area of feed inlet 1, and the second material position is visited Device 12 is surveyed to be mounted on away from 1 360~450mm of oral area of feed inlet.Feed inlet sealing and level control system, after tested, in L/D= 9.5~13.5 ranges, feed inlet stock column height H=1200~1500mm can achieve production engineering specifications.Pass through material-height exploring Device and vibrator cooperation, control controlling level, meet seal request.In every section of wind washing cylinder, by lime in feed inlet end pipeline The filling of stone raw material, seals, and controls controlling level by material level detector and vibrator.Vibrator power, that is, vibrating feed speed Degree must satisfy stock column control height lower limit.
In embodiment of the disclosure, the inclination angle alpha of vibration material delivering section 2 is 18~22 °, high-pressure blast nozzle 21 and vibration The axis angle β of conveying section 2 is 28~32 °.The installation of high-pressure blast nozzle 21 must assure that wind washing cylinder axis and high-pressure blast nozzle 21 axis keep certain angle, to guarantee that high-pressure blast flow direction is consistent substantially with wind washing material trend, reduce wind washing cylinder diameter Interference aweather.The results show: the angle of 21 axis of wind washing cylinder axis and high-pressure blast nozzle is 30 ± 2 ° of Shi Fengxi efficiency Highest.Enter expansion chamber (gravity settling separation channel) to control dust-laden wind along certain direction, it is necessary to control feed inlet 1 Windage is much larger than the windage of discharge port 4.The method for realizing feed inlet 1 and the big minor adjustment of 4 windage of discharge port is control feed inlet material The height of column and the mounting inclination angle degree of wind washing cylinder.The results show: feed inlet stock column height H=850~1500mm, wind are washed The flow direction of the i.e. controllable high-pressure blast of 18~22 ° of mounted angle of cylinder.
In embodiment of the disclosure, the first vibrator 13 is set on feed inlet 1, is arranged in vibration material delivering section 2 Two vibrator 22.Wind washing cylinder is equipped with certain inclination angle, and applying small vibration force can be realized storeroom rolling collision downslide To next section feeding mouth.The air of certain pressure, certain flow rate is aweather blown into washing cylinder, air can only be along material traffic direction stream It is dynamic, until being excluded when next section of wind washing cylinder feed inlet by air outlet.Large dust particle in gas is settled in expansion chamber to be collected, by Screw machine excludes, remaining dust-laden exhaust gas enters bag filter purified treatment.Lime stone after second segment wind washing cylinder wind is washed is former Material, crosses slide sieve, and removing has disengaged from the sand grains and mountain skin that raw limestone wind-force can not be taken away.
In embodiment of the disclosure, bag-type dust split tunnel 6 and gravity settling separation channel are set gradually along longitudinal direction 7；Air outlet 3 is connected to bag-type dust split tunnel 6 and gravity settling separation channel 7；Discharge port 4 connect or discharges with slide sieve 8 Mouth 4 is connected to multistage wind washing cylinder；Slide sieve 8 and gravity settling separation channel 7 are connect with screw(-type) feeder 9 respectively.Silt segregative line System, the mainly design of expansion chamber are constant in flow since airflow channel area increases suddenly after dust-laden wind enters expansion chamber Under the premise of wind speed decreased, according to Stokes (Stokes) law, particle sinking speed V:
In formula, η is the viscosity of liquid medium；ρ is the specific gravity of sample；ρ0For the specific gravity of medium；G is acceleration of gravity, and r is Particle radius.
When wind speed is greater than the sinking speed for the particle that radius is r, radius is that the particle of r enters bag filter, radius Particle greater than r, is settled down to expansion chamber bottom, and screw machine excludes.Design sedimentation can be calculated according to sedimented particle size requirements Room.
Embodiment one:
Use in implementation process is that fat lime stone is crushed raw material, chemical composition are as follows: CaO=55.7%, MgO= 0.3%, Fe2O3=0.1%, SiO2=0.71%, Al2O3=0.23%, K2O=0.08%, Na2O=0.02%, SO3= 0.02%, P2O5=0.01, LOI=43.46%.
The raw limestone two-period form wind of 5~9cm washes the construction and operation of line:
Expectation index: for sediment content less than 0.5%, treating capacity 80t/h, hundred tons of average current drains are less than 50kwh.Actual measurement 5~ 9cm raw limestone natural packing porosity is 40.7%, and windage is smaller.
The separation equipment of low clay content raw limestone:
The separation equipment of the present embodiment includes light breeze washing cylinder；Force one wind washing cylinder is identical with the structure of light breeze washing cylinder, edge Lontitudinal series.
Wind washing cylinder includes the feed inlet 1 being sequentially communicated, vibration material delivering section 2, discharge port 4 and air outlet 3, in vibration material delivering section 2 setting high-pressure blast nozzles 21；Feed inlet 1 is longitudinally disposed, and air outlet 3 is transversely arranged, 2 transition of vibration material delivering section connection charging Mouth 1 and air outlet 3 are obliquely installed；The draw ratio of vibration material delivering section 2 is 13.1, internal diameter D=800mm, length L=10500mm, L/ D=13.1.
The internal diameter D=800mm of feed inlet 1, height H=1500mm.First material level detector, 11 He is installed on feed inlet 1 Second material level detector 12, the first material level detector 11 are mounted on the oral area of feed inlet 1, the second material level detector 12 be mounted on away from At 1 oral area 450mm of feed inlet.The inclination angle alpha of vibration material delivering section 2 is 18 °, the axis of high-pressure blast nozzle 21 and vibration material delivering section 2 Wire clamp angle beta is 32 °.First vibrator 13 is set on feed inlet 1, the second vibrator 22 is set in vibration material delivering section 2.Along vertical To setting gradually bag-type dust split tunnel 6 and gravity settling separation channel 7；Air outlet 3 is with bag-type dust split tunnel 6 and again Power sedimentation separation channel 7 is connected to；Discharge port 4 is connect with slide sieve 8 or discharge port 4 is connected to multistage wind washing cylinder；Slide sieve 8 and gravity are heavy Drop split tunnel 7 is connect with screw(-type) feeder 9 respectively.
Equipment operating parameter and effect: the first vibrator power 0.75kw, exciting force 7kN (utilization rate is lower).Second vibration Dynamic device power 1.5kw, vibration frequency 25Hz, exciting force 18kN.
High-pressure blast nozzle 21 connects G200 high pressure blower, model 2EB1 820-7HH47, power 15kw, wind pressure 67kPa, stream Measure 710m3/ h, high-pressure blast nozzle 21 use critical flow venturi nozzle, the stream being gradually expanded behind throat with aperture Road, flow velocity is high, and the pressure loss is smaller.
The inlet amount 80t/h of feed inlet 1 feeds sediment content 2.7%, and discharge sediment content 0.14%, silt removal rate 94.8%.Hundred tons of raw material power consumption 34kwh.
Hundred tons of average current drain 35kwh.By local every 0.34 yuan of kwh electricity price calculating, it is 0.12 yuan that wind per ton, which washes cost, with hundred Ton raw limestone washing need to supplement 3 tons of fresh waters and compare, lower than washing cost.
Embodiment two:
Use in implementation process is that fat lime stone is crushed raw material, chemical composition are as follows: CaO=55.7%, MgO= 0.3%, Fe2O3=0.1%, SiO2=0.71%, Al2O3=0.23%, K2O=0.08%, Na2O=0.02%, SO3= 0.02%, P2O5=0.01, LOI=43.46%.
The raw limestone two-period form wind of 2-5cm washes the construction and operation of line:
Expectation index: for sediment content less than 1%, treating capacity 70t/h, hundred tons of average current drains are less than 55kwh.Survey 2~5cm Raw limestone natural packing porosity is 38.4%, and windage is greater than the raw material of 5~9mm.
The present embodiment and embodiment one the difference is that:
Equipment operating parameter and effect: the draw ratio of vibration material delivering section 2 is 11.9, internal diameter D=800mm, length L= 9500mm, L/D=11.9；The inclination angle alpha of vibration material delivering section 2 is 22 °, the axis of high-pressure blast nozzle 21 and vibration material delivering section 2 Angle β is 28 °.1 internal diameter D=800mm of feed inlet, height H=1200mm, the second material level detector 12 are mounted on away from feed inlet 1 At oral area 360mm.First vibrator power 0.75kw, exciting force 10kN (utilization rate is lower).Second vibrator power 1.5kw, Vibration frequency 25Hz, exciting force 22kN.High-pressure blast nozzle 21 connects G200 high pressure blower, model 2EB1 820-7HH47, power 15kw, wind pressure 74kPa, flow 620m3/h；The inlet amount of feed inlet 1 is 70t/h；
Sediment content 3.1% is fed, discharge sediment content 0.20%, silt removal rate 93.5%.Hundred tons of raw material power consumptions 36kwh。
The preparation method and separation equipment of low clay content raw limestone of the invention are in northwest serious water shortage mountain area reality It applies.2~5cm raw limestone two-period form the wind for having built 70t/h washes line and 5~9cm raw limestone two-period form wind of 80t/h Line is washed, wind washes rear sediment content and reached expected purpose.
Consider that, using a Duan Fengxi, silt is difficult to completely remove, and product is not up to standard from investment and Energy Angle；Using three Duan Fengxi, building of production line investment is high, energy consumption of unit product is high.5~9cm raw limestone after two sections of wind washing cylinder wind are washed, Sediment content by original 2.0%~2.7% be down to 0.15% hereinafter, 2~5cm raw limestone, sediment content is by original 2.3%~3.1% be down to 0.20% or less.Hundred tons of average current drain 35kwh.It is per ton by local every 0.34 yuan of kwh electricity price calculating It is 0.12 yuan that wind, which washes cost, compared with hundred tons of raw limestone washings need to supplement 3 tons of fresh waters, lower than washing cost.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments disclosed in this hair, if its without prejudice to The thought of the disclosure equally should be considered as the content that the disclosure is invented.

Claims (10)

1. a kind of preparation method of low clay content raw limestone characterized by comprising
S1: vibration material delivering makes the silt of lime stone surface to be processed fall off to form mobile mixture containing silt, to mobile Mixture containing silt carries out fair current wind and washes, and generates wind band dust and gravel lime stone mixing；
S2: wind band dust of the partial size less than 0.5mm is separated by bag-type dust；The wind band dust that partial size is 0.5~1.5mm passes through Gravity settling separation；
S3: the lime stone and gravel that the removal of gravel lime stone mixing is less than Particle size requirements are up to low clay content raw limestone；Or Person's gravel lime stone mixing is successively removed lime stone and sand less than Particle size requirements again after S1 and S2 more times processing again Gravel is up to low clay content raw limestone.
2. the preparation method of low clay content raw limestone according to claim 1, which is characterized in that the fair current wind The wind pressure washed is 67~74kPa, 620~710m of wind flow that fair current wind is washed3/ h, the distinguished and admirable speed that fair current wind is washed for 12.1~ 13.5m/s。
3. the preparation method of low clay content raw limestone according to claim 1 or 2, which is characterized in that described Seal lime building stones formation material to be processed before vibration material delivering, the wind for washing fair current wind is only along the direction that dust-laden mixture moves Flowing；
Gravel lime stone mixing forms material sealing in discharging；
The natural packing voidage of the lime building stones to be processed is greater than 36%.
4. the preparation method of low clay content raw limestone according to claim 1 or 2, which is characterized in that the vibration The tilt angle of dynamic conveying is 18~22 °；
Angle between the inclined surface of wind direction and vibration material delivering that fair current wind is washed is 28~32 °.
5. the preparation method of low clay content raw limestone according to claim 1 or 2, which is characterized in that the vibration The vibration frequency of dynamic conveying is 25Hz, 18~22kN of exciting force.
6. a kind of separation equipment of low clay content raw limestone, which is characterized in that the low clay content raw limestone Separation equipment carries out low contain using the preparation method of low clay content raw limestone described in claim 1-5 any claim The separation of mud amount raw limestone；
Including at least force one wind washing cylinder, the wind washing cylinder includes the feed inlet (1) being sequentially communicated, vibration material delivering section (2), discharging High-pressure blast nozzle (21) are arranged in the vibration material delivering section (2) in mouth (4) and air outlet (3)；
The feed inlet (1) is longitudinally disposed, and air outlet (3) is transversely arranged, and (2) transition of vibration material delivering section connects feed inlet (1) it is obliquely installed with air outlet (3)；
The draw ratio of the vibration material delivering section (2) is 9.5~13.5.
7. the separation equipment of low clay content raw limestone according to claim 6, which is characterized in that feed inlet (1) Height H=1200~1500mm also installs the first material level detector (11) and the second material-height exploring on the feed inlet (1) Device (12), the first material level detector (11) are mounted on the oral area of feed inlet (1), and the second material level detector (12) is mounted on away from charging At mouth (1) 360~450mm of oral area.
8. the separation equipment of low clay content raw limestone according to claim 6, which is characterized in that the vibration is defeated The inclination angle alpha for expecting section (2) is 18~22 °, and the axis angle β of the high-pressure blast nozzle (21) and vibration material delivering section (2) is 28~32 °.
9. the separation equipment of low clay content raw limestone according to claim 6, which is characterized in that in the charging The first vibrator (13) are set on mouth (1), the second vibrator (22) are set in the vibration material delivering section (2).
10. the separation equipment of low clay content raw limestone according to claim 6, which is characterized in that along longitudinal direction successively It is arranged bag-type dust split tunnel (6) and gravity settling separation channel (7)；
The air outlet (3) is connected to bag-type dust split tunnel (6) and gravity settling separation channel (7)；
Discharge port (4) is connect with slide sieve (8) or discharge port (4) is connected to multistage wind washing cylinder；
Slide sieve (8) and gravity settling separation channel (7) are connect with screw(-type) feeder (9) respectively.
CN201910687249.7A 2019-07-29 2019-07-29 Preparation method and separation equipment of low-mud-content limestone raw material Active CN110465399B (en)

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JP2018002563A (en) * 2016-07-05 2018-01-11 鹿児島県 Hydraulic lime and method for producing same
CN108043725A (en) * 2018-02-18 2018-05-18 鞍山重型矿山机器股份有限公司 Construction refuse regenerated aggregate vibration winnowing equipment
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* Cited by examiner, † Cited by third party
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JP2012228818A (en) * 2011-04-26 2012-11-22 Dowa Eco-System Co Ltd Method for sorting and removing rubber and urethanes from crushed matter
CN104438088A (en) * 2014-10-31 2015-03-25 中联重科股份有限公司 Material dispersing and dust removing device and method, air inlet structure of material dispersing and dust removing device and air vibrating screen
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