CN109201219A

CN109201219A - Dry grinding system

Info

Publication number: CN109201219A
Application number: CN201810436186.3A
Authority: CN
Inventors: 关根靖由; 奥山杏子; 岩本玄德
Original assignee: Mitsui Mining Co Ltd
Current assignee: Mitsui Mining Co Ltd
Priority date: 2017-06-30
Filing date: 2018-05-09
Publication date: 2019-01-15
Anticipated expiration: 2038-05-09
Also published as: KR102571138B1; JP2019010616A; JP6871087B2; KR20190003324A; CN109201219B

Abstract

The present invention provides a kind of dry grinding system (10), and the variation of the size distribution after crushing and processing is less and is capable of forming sharp curve always.It has: medium agitation type pulverizer (20), has the mixing component (23) in the inside of crushing container (21) and rotary shaft (22) while rotation；Driving portion (60) drives rotary shaft (22)；Control unit (50) controls the rotation of the driving portion (60), and control unit (50) has: can at least input the set-up function of alt time；Grasp the measurement function of the operating condition of medium agitation type pulverizer (20)；Towards the alternate output function of driving portion (60) instruction direction of rotation.Measurement function preferably measures the internal temperature of crushing container (21), and preferentially instruction replaces from the propradation of measured value to driving portion (60).

Description

Dry grinding system

Technical field

The present invention relates to a kind of dry grinding systems using media-agitation type pulverizer, implement to criticize more particularly to a kind of Measure the dry grinding system of processing.

Background technique

Dry grinding processing using media-agitation type pulverizer is by generating using between the crushing medium being stirred Shearing force and impact force implement the processing method of fine grain body.

The spheric granules for being 3 to 15mm usually using diameter, such as the material of stainless steel or wear-resistant ceramic are situated between as processing Matter is in the majority.

Have in crushing and processing method: continuous process is added continuously processing substance and continuous into crushing container Ground discharge；Batch processing method carries out the processing of predetermined time after putting into scheduled processing substance into crushing container.

In Continuous maching, due to the variation etc. of the amount for the processing substance being trapped in crushing container, therefore, it is difficult to continue Implement identical crushing and processing, smashed particle diameter expands in a wider scope and wider size distribution easy to form is bent Line.

On the other hand, in batch machining, it is capable of forming the higher product of homogeneity.That is, due to for processing Substance is integrally easy to implement same crushing and processing, so smashed particle diameter concentrates in lesser range and size distribution Form sharp curve.

The dry media stirred type pulverizer for implementing batch machining is described in patent document 1, it is higher in order to implement Homogeneity processing needs the structure that will not accumulate using the supply mouth and outlet in processing substance, therefore to effective supply Valve and drain valve are recorded.

In addition, describing, crushing and processing are essentially that rotation axis horizontal is placed and implemented, and still, are crushed to remove Coherent substance in container and in the way of crushing and processing in the state of 1 to 2 only titling axis in a relatively short period of time into Row rotation.

But the range of the processing substance with the object expanded as crushing and processing, there is more unmanageable add Work substance.That is, size distribution may not when repeating the case where implementing identical batch machining in identical processing substance It is constant variation and may be wider curve.

An example as processing substance, it is known that such as tea, Chinese medicine, bake coffee etc. vegetalitas process in substance compared with It is common.In addition we know, the ingredients such as the moisture in these processing substances and oil slightly change, and powder occurs therefrom The variation of the adhesiveness of broken container.

In addition, when the case where implementing identical crushing and processing for metal powder and metal oxide, although can pass through It repeats to crush with pressure welding and carries out alloying (mechanical alloying processing) and chemical reaction (mechanochemistry processing), even if this In the case of size distribution also have variation.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2016-129866 bulletin

Summary of the invention

Problems to be solved by the invention

The object of the present invention is to provide a kind of dry grinding system of batch machining, it is suitable for it is that people often eat such as Tea, Chinese herbal medicine, the processing substance of roast coffee beans etc., or implement for the processing substance of metal powder and metal oxide Best crushing system.

That is, providing one kind can be for what the processing substance with adhesiveness obtained sharp size distribution System, and one kind is provided, identical batch machining is being repeated several times on the way, even if the feelings that the component ratio of moisture etc. changes Under condition, the crushing system of size distribution sharp always can be also obtained.

The means used to solve the problem

The present invention is a kind of for implementing the dry grinding system of batch machining, which is characterized in that is had: medium stirred type Pulverizer has the mixing component rotated together with rotary shaft in the inside of crushing container；Driving portion drives the rotation Axis；Control unit controls the rotation of the driving portion；The control unit has: can at least input the setting function of alt time Energy；Grasp the measurement function of the operating condition of the medium agitation type pulverizer；Indicate that the driving portion carries out direction of rotation Alternate output function.

It is preferred that the measurement function measures the internal temperature of the crushing container, become rising shape from measured value State rises, and indicates that the driving portion preferentially carries out the alternating.

Additionally, it is preferred that the measurement function measures the power in the driving portion, become changing shape from measured value State rises, and indicates that the driving portion preferentially carries out the alternating.

The effect of invention

Crushing system of the invention integrally can completely process processing substance, and undressed due to not leaving Part and sharp size distribution can be obtained.Moreover, also can in the case where the adhesiveness for processing substance changes Obtain identical size distribution always.

In addition, will appreciate that the characteristic of each processing substance, and can be to each by measurement temperature and power It processes substance and implements optimal processing.

Detailed description of the invention

Fig. 1 is the schematic configuration diagram for indicating an example of dry grinding system of the invention.

Fig. 2A, Fig. 2 B are the explanatory diagrams for being illustrated to the adherency inside crushing container.

Fig. 3 is the general flowchart for indicating the processing flow of control unit.

Description of symbols

10 dry grinding systems

20 medium agitation type pulverizers

21 crushing containers

22 rotary shafts

23 mixing components

30 primary side power supplys

50 control units

60 driving portions

Specific embodiment

Even if the present inventor couple is the case where repeating identical batch machining using identical processing substance When, also non-constant problem conducts in-depth research size distribution.

Itself as a result, it has been found that, since the slight variations of the component of processing substance cause adherency to sexually revise, so as to cause granularity point The variation of cloth.

In order to solve this problem, it repeats to study crushing medium and processing using the crushing container made of transparent resin Movement between substance as a result, it is possible to rest in adherency condition of the processing substance when adhering on wall of a container surface.In addition, Removing condition when removing the processing substance of (temporary) adherency on the wall surface from wall surface can also be grasped.

Moreover, in the way of a batch machining, and passing through the direction of rotation of alternate agitation component several times and implement operating The processing substance of adherency on the wall surface can be removed from wall surface, and sharp always by repeating to implement to obtain Size distribution.

Pass through the direction of rotation of alternate agitation component and implement operating be capable of forming sharp size distribution be due to Under reason.

A) adhesiveness processing substance is adhered to the specific position of crushing container and as the time increases.

B) adhered in crushing container increased partially due to being not subjected to crushing and processing hereafter, therefore, processing substance is total Wider size distribution is presented on body.

C) when the direction of rotation of alternate agitation component, the processing substance that adherency increases part can be removed.Then, quilt The processing substance of removing is immediately subjected to crushing and processing.

D) due to the alternating of direction of rotation, although processing substance adheres to and increases on new specific position, as long as Repeat to replace, there would not be the part long lasting for adherency.

E) therefore, even if there is adherency processing substance, can also implement identical as the processing substance of absolutely not adhesiveness Crushing and processing uniform always.

Fig. 1 is the schematic configuration diagram for indicating the dry grinding system 10 as an example of the present invention.

Dry grinding system 10 is the crushing system for the dry grinding for implementing batch machining by medium agitation type pulverizer 20 System.

Solid component is suspended in the slurry condition in liquid relative to case of wet attrition, dry grinding is that solid particle exists The crushing and processing crushed under the state.Even if when the case where solid particle containing the liquid of adhesive moisture etc., as long as not It is slurry condition, also referred to as dry grinding.

In medium agitation type pulverizer 20, in the inside of laterally cylindric crushing container 21, rotary shaft 22 is from side Side wall insertion, and constitute the mixing component 23 that the multiple stirring rod rotated integrally with rotary shaft 22 are formed.

In the inside of crushing container 21, investment is as crushing medium and the solid particle of processing substance, rotary shaft 22 and stirring Component 23 rotates simultaneously and carries out the stirring of predetermined time in the inside of crushing container 21.

By the stirring, the shearing force or impact force that are generated between crushing medium and can make to process substance micromation.

In addition, the peripheral wall of crushing container 21 is equipped with sheath 25 in medium agitation type pulverizer 20, composition has by cold But the circulation of medium carrys out the cooling-part inside cooling crush container 21.This is to inhibit the power of agitator (power) by consuming The temperature of caused processing substance etc. rises.

Cooling medium enters sheath 25 from suction line 91 and is discharged from outlet line 92.

Dry grinding system 10 of the invention is characterized in that, even if processing substance has adhesiveness, in order to avoid in wall Prolonged adherency on surface makes the direction of rotation alternating of rotary shaft 22 for several times and is transported during a batch machining Turn.

The processing substance for being adhered to wall surface becomes not by the part of crushing and processing and becomes unprocessed machining object always A possibility that matter, is higher.But when being alternately rotated the direction of rotation of axis 22, the processing substance of adherency removed from wall surface and Again by crushing and processing, as a result, processing substance can generally be obtained by identical crushing and processing sharply always Size distribution.

In order to implement such processing, dry grinding system 10 has driving portion 60 and the control driving of driving rotary shaft 22 The control unit 50 that portion 60 rotates.

Driving portion 60 is using the electric power from primary side power supply 30 come the circuit of driving motor 31, can be according to carrying out automatic control The instruction in portion 50 processed and the inside of broken container 21 can be made to form optimal stirring.

In order to be alternately rotated direction of rotation and the unrestricted choice number of revolutions of axis 22, it is preferably configured as, side electricity will be come from After the AC power in source 30 is converted to direct current power by rectifier, the exchange for being suitable for being again stirring for is transformed to by inverter Electric power.

Control unit 50 has: the set-up function of the setting value of alt time etc. is inputted for operator；Grasp medium stirring The measurement function of the operating condition of type pulverizer 20；The output function of alternating of direction of rotation etc. is indicated towards driving portion 60.

Set-up function is the function that operator determines setting value by input signal 51.

For example, 22 court of rotary shaft can be made by inputting the process time D1 for implementing a batch machining or inputting The maximum value of the time rotated to the same direction is as alt time D2, to constitute setting value.

Measurement function is to grasp the function of the operating condition of media-agitation type pulverizer 20.

That is, can be by total (always) of the process time after beginning batch operation by time M1 or by identical direction The part for rotating and generating is inputted by time M2 as measured value.

In addition, having the temperature signal 55 that the internal temperature of crushing container 21 is measured and inputted, and have The standby power signal 56 that the consumption power of driving portion 60 is measured and inputted.

Relative to these measured values, the setting value for each measured value can be set by input signal 51.

Output function is to indicate that driving portion 60 drives the function of rotary shaft 22.

That is, CRANK PULSES 52 can be issued and indicate the starting and stopping of rotary shaft 22, and issue alternating signal 53 simultaneously Indicate the alternating of direction of rotation.

CRANK PULSES 52, press startup button and when starting running, alternatively, total reach process time D1 by time M1 And when terminating batch machining, it is issued.

When reaching alt time D2 in addition to partially passing through time M2 in process, even if in dry grinding system 10 Temperature and power etc. measured value in measure exceptional value the case where when also issue alternating signal 53, not tube portion pass through Cross time M2 value how, control unit 50 can indicate driving portion 60 preferentially carry out rotary shaft 22 direction of rotation alternating.

For example, when measuring the temperature in crushing container 21, although the stirring as caused by the driving of motor 31 it is hot and Lead to the rising of internal temperature, but is formed with cooling heat due to cooling medium and balance and become substantial constant.

Moreover, when processing substance is adhered to the inner wall of crushing container 21, due to the heat transfer efficiency change towards cooling medium Poor and in crushing container 21 temperature rises, thus it is possible to rise detecting such temperature, and revolves to driving portion 60 Turn the alternate instruction in direction.

In addition, the consumption electricity of the driving portion 60 when stirring crushing medium by the rotation of mixing component 23 and processing substance Power rapidly rises when the driving of motor 31 starts and shows maximum value, then stable to continue in certain value and in steady-state value. Under the stable state, when process substance adherency be deposited on the inner wall of crushing container 21 when, due to consumption power increase or It reduces, so being able to detect the variation, and carries out the alternate instruction of direction of rotation to driving portion 60.

Then, the movement of crushing medium and processing substance in crushing container 21 is illustrated referring to Fig. 2A, Fig. 2 B, and The adherency of processing substance is illustrated.

Fig. 2A, Fig. 2 B are to indicate that the outline of the inside towards the direction of rotary shaft 22 observation medium agitation type pulverizer 20 is cut Longitudinal view of the summary sectional view of the A-A arrow direction of the circular diagram and figure of face figure.

Since crushing container 21 is formed by transparent resin, and by the movement of observation crushing medium and processing substance, thus Problem and its essence of the invention can be grasped and solved.

The direction of rotation of rotary shaft 22 is known as clockwise with direction shown in the arrow in circular diagram, and along opposite Direction is known as counterclockwise.Then, by the circumferential locations of crushing container 21 with hour hands to indicate, and topmost is claimed When position, the left side of (6 points) are known as 9 when the position of (3 points), lowest part are known as 6 when the position, right side of (0 point) are known as 3 when being 0 The position etc. of (point).

In addition, the part for passing through the front end of mixing component 23 is known as passing through two by position x in longitudinal view The centre for crossing position x is known as middle position y.

Loading when filling crushing medium in broken container 21 is set to the axis of slightly above rotary shaft 22.That is, Top surface becomes and is formed from the mode of 2 points of 30 minutes to 9 points 30 minutes height.

Since the partial size of investment processing substance is smaller than usual crushing medium, so in the position of investment processing substance rear top surface Substantially do not change.

In circular diagram, when mixing component 23 is rotated in a clockwise direction, the top surface of crushing medium and processing substance is on the right side Side drops to 3 points~3 points 30 minutes positions, rises to 10 points~10 points 30 minutes positions in left side.

Then, as the quickening of rotation, crushing medium and processing substance move in the space on top from left side to the right.Powder The moving direction of broken medium is relatively random, and when rotation speed is accelerated, moving condition also becomes fiercer.

In this way, seeming to be thrown into the other side in the crushing medium that side is wiped off in bubble view.

Therefore, left side is known as in the clockwise direction wiping side off, right side is known as throwing side, it will be in counter clockwise direction Right side is known as hanging side, and left side is known as throwing side.

In longitudinal view, the movement of crushing medium hangs side and is throwing difference between side, in addition, by position x Also different between the y of middle position.

In hanging side, the movement of crushing medium is by significantly different between position x and middle position y, by position Set x movement be it is strong, in middle position, the movement of y is slow.

In addition, in throwing side, although by between position x and middle position y, there are movement differential, difference very littles And generally random motion.

It is conceived to the movement (movement) of processed substance, hangs side, processes substance trend in the movement from crushing medium The stronger middle position y less by position x orientation movements is mobile, and trend is in the wall surface for concentrating on middle position y Near.Then, over time, processing substance is adhered to the wall surface of middle position y and has the trend gradually increased.

On the other hand, it was known that hang side, due to there is the movement of crushing medium on the whole, so, processing substance also has One synkinematic trend is without being adhered to by either party of position x or middle position y.

Then, the case where processing substance in the state of hanging the adherency increase of side, being alternately rotated the direction of rotation of axis 22 When, become counterclockwise and right side become hang side, left side become throw side.

Then, it is thus identified that, on as the left side for throwing side, by the movement of random crushing medium, it is adhered to wall The processing substance on surface is gradually removed.

Simultaneously, it is thus identified that, on as the right side for hanging side, processing substance is from by position x, position y is mobile towards the middle And it is adhered to wall surface and gradually increases.

That is, processing substance has the increased effect of adherency on hanging side.

This is because the movement of crushing medium is by position x and by different on the y of position, machining object on hanging side Matter is mobile from the fiercer middle position y slower by position x orientation movements is moved, and adheres to increase in middle position y On.

On the other hand, it in hanging side, not only processes substance and does not adhere to, but also there is the work for removing adherency processing substance With.

It is thrown since crushing medium is random, so, the random and machining object that the movement of wall surface attachment also becomes Matter will not or adherency mobile towards specific position.Also, such random movement, which can remove, is adhered to wall surface Processing substance.

Therefore, the direction of rotation of alternate agitation component 23 and as throw side wall surface on implement remove bur Matter.

Although being stirred that is, generating adherency in crushing container at any time during implementing crushing and processing by implementing It mixes the alternating of component 23 and coherent substance can be removed.

Therefore, processing substance is uniformly processed on the whole and is capable of forming the product for having sharp size distribution.

Next, being illustrated referring to an example of Fig. 3 to the processing of control unit 50.

In step S01, operator sends input signal 51 to control unit 50 and inputs operating condition before operation start.Example Such as, the process time D1 or input inputted in a batch machining can rotate most as rotary shaft 22 towards the same direction The alt time D2 that is worth greatly forms setting value.

In addition, as needed, it is capable of the measured value of internal temperature to crushing container etc., the setting of setting limits value etc. Value.

In step S02, it will implement by time M1 with being partially set as 0 by time M2 as the total of measured value Initialization, and in step S03, become the wait state that the starting processing of medium agitation type pulverizer 20 starts.

In step S03, start button is pressed by operator and starts state as the processing of step S04, and is led to It crosses step S05 and starts to measure total time M1 and part of passing through by time M2.

Then, in step S06, part is waited to reach alt time D2 by time M2, is waited in step S09 total Reach processing time D1 by time M1.

In step S06, when part reaches alt time D2 by time M2, instruction is alternately rotated in step slo Direction, and after part is initialised for the time being by time M2 in step s 11, measurement portion is started again in step s 12 Lease making crosses time M2.

Exception 1 in step S07 is the case where internal temperature of such as crushing container 21 rises, different in step S08 Normal 2 be the case where for example consuming power variation.

Even if in these exceptions, also it is identical as step S06 ground implementation steps S10 to step S12.That is, depositing In abnormal situation, implement the alternating of direction of rotation by time M2 prior to part.

In addition, when adding up to the case where reaching process time D1 by time M1, stopping rotation in step S13 in step S09 The rotation of shaft 22, and terminate a batch machining.

More than, embodiments of the present invention are described in detail referring to attached drawing, still, specific construction is not limited to The embodiment is also contained in the present invention in the design alteration for the range for being no more than purport of the invention.

For example, the mode of the rotation number of mixing component 23 can be changed on the way in processing, rotation speed can be set Determine or change possible system.

Claims

1. a kind of dry grinding system for batch machining, it is characterised in that:

Have: medium agitation type pulverizer has the mixing component rotated together with rotary shaft in the inside of crushing container；It drives Dynamic portion, drives the rotary shaft；Control unit controls the rotation of the driving portion,

The control unit has: can at least input the set-up function of alt time；Grasp the medium agitation type pulverizer The measurement function of operating condition；Indicate that the driving portion carries out the alternate output function of direction of rotation.

2. dry grinding system according to claim 1, it is characterised in that:

The measurement function measures the internal temperature of the crushing container, from measured value becomes propradation, instruction The driving portion preferentially carries out the alternating.

3. dry grinding system according to claim 1 or 2, it is characterised in that:

The measurement function measures the power in the driving portion, from measured value becomes upset condition, described in instruction Driving portion preferentially carries out the alternating.