CN203379935U - Machine-made natural sand grading adjusting system - Google Patents
Machine-made natural sand grading adjusting system Download PDFInfo
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- CN203379935U CN203379935U CN201320380664.6U CN201320380664U CN203379935U CN 203379935 U CN203379935 U CN 203379935U CN 201320380664 U CN201320380664 U CN 201320380664U CN 203379935 U CN203379935 U CN 203379935U
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Abstract
The utility model relates to a machine-made natural sand grading adjusting system. A discharge end of an inlet sand conveyor belt is dead against a feed inlet of a steel shot mixing hopper, the steel shot mixing hopper is opposite to a discharge outlet of a tower type steel bead hopper lifting machine through a steel bead feeding chute, a discharge outlet of the steel shot mixing hopper is communicated with a feed inlet of a machine-made grading adjusting machine, a dust collection cover of the machine-made grading adjusting machine is communicated with a dust collector by a conveyor pipe, a discharge outlet of the machine-made grading adjusting machine is opposite to the feed end of an outlet sand conveyor belt, a primary electromagnetic steel shot separator is arranged above the discharge end of the outlet sand conveyor belt, a discharge outlet of the primary electromagnetic steel shot separator is opposite to the surface of a steel bead grain size control chute through a steel bead discharge chute, a steel bead grain size control section is arranged on the surface of the steel bead grain size control chute, a discharge end of the steel bead grain size control section is dead against a feed inlet of a rough steel grain ground trough, a discharge end of the outlet sand conveyor belt is dead against a finished sand conveyor belt, and a secondary electromagnetic steel shot separator is arranged above a discharge end of the finished sand conveyor belt.
Description
Technical field
The utility model relates to a kind ofly can either make Machine-made Sand the quality of natural sand, can not produce overground phenomenon again, can be applicable to again the machine-processed natural sand gradation adjustment system of dry method sand processed, belongs to Machine-made Sand and manufactures field.
Background technology
Existing sand machine processed comprises impact cutting, and counterattack is broken, twin rollers, rod mill, tup machine, ultrafine grinding cone machine etc.Can to produce the relative rounding of particle diameter attractive in appearance except rod mill for above machine, beyond modulus of fineness Machine-made Sand relatively less than normal, other machines all is merely able to produce the Machine-made Sand of modulus of fineness in 3.6 left and right, and in the Machine-made Sand that modulus of fineness is less in finished product, its faller gill shape is just higher, causes the integral product quality of Machine-made Sand greatly to descend; And the rod mill interpolation is wear resistant bar, in the middle of the process that this machine rolls at cylindrical shell, rod is also along a direction repeatedly roll (this rod can only in the middle and lower part of barrel along with the synchronous rolling motion is done in the rotation of barrel), Machine-made Sand in cylindrical shell is crushed between rod, although it is attractive in appearance that rod mill can be produced the relative rounding of particle diameter, the Machine-made Sand that modulus of fineness is relatively less than normal, but one be that self production capacity is on the low side; The 2nd, produce a large amount of overground phenomenons, cause powder amount discarded in finished product high, contaminated environment, and cause waste of raw materials; Three rod mills are also relatively immature in the use of dry method sand processed, poor effect.
The utility model content
Purpose of design: avoid the weak point in background technology, design and a kind ofly Machine-made Sand can either be made to the quality of natural sand, can not produce again overground phenomenon, save material, can be applicable to again the machine-processed natural sand gradation adjustment system of dry method sand processed and environmental protection.
Design: the building mortar industry has been stepped into the commodity epoch, mortar is also from touching wall steps into the whitewashing epoch by hand, and can reach at present the river sand that only has of gunite effect, the Machine-made Sand that any plant equipment processes all can't reach the required modulus of fineness of whitewashing and particle roundness (husky and different in nature), the artificial sand finished product that causes the building mortar industry to lack can replacing river sand fully.In order to solve this difficult problem, the utility model is on structural design: although 1, the Machine-made Sand grading adjuster added medium, what add is the steel ball that do not wait of diameter (this steel ball mix the Machine-made Sand that needs to adjust be thus lifted to together the barrel top do the repetition step-by-step movement of counterattack and move).This steel ball can be that the reinforcing bar crop of finished product can be also that the screw-thread steel crop of construction waste is made, as long as this crop possesses certain mass, can play the strike effect and get final product from high-end falling.This steel ball enters the Machine-made Sand grading adjuster jointly with needing the Machine-made Sand of adjusting, the rolling of Machine-made Sand grading adjuster drives the step-by-step movement hopper and constantly does lifting batch turning campaign, steel ball is thus lifted to top with needing the Machine-made Sand of adjusting simultaneously, and fall simultaneously, the own material of reaction type stepping hopper in bottom is potassium steel, and special design counterattack bar and two counterattack faces, steel ball both can impact the Machine-made Sand that the needs on counterattack face are adjusted while dropping to the counterattack surface, can impact the Machine-made Sand on adjacent counterattack face through bounce-back again, secondly whole barrel is in ceaselessly rotation, the Machine-made Sand that pile up bottom and the mixture of steel ball are constantly impacted, the rolling grinding, risen to top and repeat to do whereabouts by the next stage bucket again, impacted, grinding, the operation of stepping, reduce the modulus of fineness of Machine-made Sand with this, and in the middle of rolling, the water caltrop of Machine-made Sand is ground off, therefore the Machine-made Sand grading adjuster had both reached the effect that reduces modulus of fineness, also reached the grain type effect of adjusting tiny Machine-made Sand, make and adjust the physical property that finished product Machine-made Sand quality afterwards reaches natural sand.2, Machine-made Sand gradation adjustment mechanomotive force adopts frequency conversion to adjust rotating speed, and the purpose of doing like this is: the modulus of fineness of controlling finished product by the different rotating speeds of Machine-made Sand gradation adjustment barrel wall.3, Machine-made Sand grading adjuster discharging section adopts the top dedusting, and bottom goes out steel ball and finished product Machine-made Sand compound, and the sand dust cover inner surface is furnished with wearing and tearing and the reduction noise of cushion rubber bumper to reduce the sand dust cover.4, with the compound of finished product Machine-made Sand, through magnetic force, screening separates the steel ball that the Machine-made Sand grading adjuster goes out, and steel ball is reused, and does not contain the irony composition in the finished product Machine-made Sand.5, because the Machine-made Sand grading adjuster is drum-type structure, the bucket of inner barrel is carried and be take three rows or clap more and be one group, adopt the step-by-step movement layout, every hopper on the same group all step-by-step movement dislocation is arranged, (annotate: take three rows as the explanation of arranging of one group of step-by-step movement: second group of hopper and the first group of hopper hopper position that misplaces half, same the 3rd group of hopper and second group of hopper are also to misplace half hopper.That is to say at barrel and rotate a circle, the material in first group of hopper has half to enter second group, and has extracted new material again from feeding mouth, with this, rotates constantly and moves towards discharging opening.) therefore, the production capacity of this machine only is subject to finished product and requires to control, and not controlled by charging, and the user can require determine according to the modulus of fineness of finished product the rotating speed of cylindrical shell, the user can adjust the charge proportion of steel ball and Machine-made Sand and throughput per hour according to self-demand simultaneously.
Technical scheme: a kind of machine-processed natural sand gradation adjustment system, charging transmits the conveyer belt discharging end directly to steel sand mixed-hopper charging aperture, the steel sand mixed-hopper is relative with tower steel ball bucket elevator discharging opening by steel ball charging chute, tower steel ball bucket elevator bottom is positioned at a crude steel material geosyncline, steel sand mixed-hopper discharging opening is communicated with Machine-made Sand gradation adjustment machine inlet capable, Machine-made Sand grading adjuster dust shield is communicated with deduster by carrier pipe, Machine-made Sand grading adjuster discharging opening is relative with discharging transmission conveyer belt feed end, discharging transmission conveyer belt discharging end top is provided with one-level electromagnetic steel sand separator and one-level electromagnetic steel sand separator discharging opening is relative with steel ball particle diameter control chute groove face by the steel ball discharging chute, the groove face that the steel ball particle diameter is controlled chute is provided with below steel ball particle diameter control section and steel ball particle diameter control section directly to thin steel particles geosyncline, steel ball particle diameter control section discharge end is directly to crude steel particle geosyncline charging aperture, discharging transmits the conveyer belt discharging end and directly finished product material is transmitted to conveyer belt, finished product material transmission conveyer belt discharging end top is provided with two-stage electromagnetic steel sand separator and two-stage electromagnetic steel sand separator discharging opening is directly controlled chute to the steel ball particle diameter, finished product material transmits the conveyer belt discharging end directly to mixing finished product sandy ground groove, finished product bucket elevator lower end is positioned at and is mixed into product sandy ground groove.
The utility model is compared with background technology, and the one, self production capacity is high, is not only applicable to wet type sand processed, and is applicable to dry method sand processed; The 2nd, can not produce overground phenomenon in sand process processed, avoided the generation of discarded powder amount in the finished product, both avoided the pollution to environment, avoided again waste of raw materials; The 3rd, the thin steel ball screened can be used as ball blast and carrys out the classification utilization, steel ball through constantly wearing and tearing has good shot effect, be the good raw material that cast(ing) surface is processed, the tiny comminuted steel shot reclaimed by electromagnetic cylinder, also can be used as cast raw material and re-used; The 4th, this Machine-made Sand can reach the husky such roundness of rivers after selection by winnowing is separated, and the particle size range of this Machine-made Sand is adjustable, and the user can adjust according to the demand of self particle diameter of Machine-made Sand, modulus of fineness; The 5th, this Machine-made Sand is due to through multiple tracks magnetic separation and selection by winnowing, iron content not in its Machine-made Sand, so this production line can be applied in ceramic tile widely, and glass, microlite is fired etc. in industry.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of machine-processed natural sand gradation adjustment system stereoscopic arrangement.
Fig. 2 is the schematic diagram of machine-processed natural sand gradation adjustment system top plan view layout.
Fig. 3-1st, the Machine-made Sand grading adjuster analyse and observe perspective view.
Fig. 3-2nd, the Machine-made Sand grading adjuster analyse and observe main TV structure schematic diagram.
Fig. 4 is the perspective view of step-by-step movement counterattack hopper.
Fig. 5 is the structural representation of backing.
Fig. 6 is the structural representation of feed inlet end liner plate.
Fig. 7 is the structural representation of material guide lining board.
The specific embodiment
Embodiment 1: with reference to accompanying drawing 1-7.A kind of machine-processed natural sand gradation adjustment system, charging transmits conveyer belt 1 discharge end directly to steel sand mixed-hopper 2 charging apertures, steel sand mixed-hopper 2 is relative with tower steel ball bucket elevator 15 discharging openings by steel ball charging chute 16, tower steel ball bucket elevator 15 bottoms are positioned at a crude steel material geosyncline 14, steel sand mixed-hopper 2 discharging openings are communicated with Machine-made Sand grading adjuster 3 charging apertures, Machine-made Sand grading adjuster 3 dust shields 5 are communicated with deduster 4 by carrier pipe, Machine-made Sand grading adjuster 3 discharging openings are relative with discharging transmission conveyer belt 17 feed ends, discharging transmission conveyer belt 17 discharge ends tops are provided with one-level electromagnetic steel sand separator 6 and one-level electromagnetic steel sand separator 6 discharging openings are relative with steel ball particle diameter control chute 11 groove faces by steel ball discharging chute 9, the groove face that the steel ball particle diameter is controlled chute 11 is provided with below steel ball particle diameter control section 12 and steel ball particle diameter control section 12 directly to thin steel particles geosyncline 13, steel ball particle diameter control section 12 discharge ends are directly to crude steel particle geosyncline 14 charging apertures, discharging transmits conveyer belt 17 discharge ends and directly finished product material is transmitted to conveyer belt 18, finished product material transmission conveyer belt 18 discharge ends tops are provided with two-stage electromagnetic steel sand separator 7 and two-stage electromagnetic steel sand separator 7 discharging openings are directly controlled chute 11 to the steel ball particle diameter, finished product material transmits conveyer belt 18 discharge ends directly to mixing finished product sandy ground groove 10, finished product bucket elevator 8 lower ends are positioned at and are mixed into product sandy ground groove 10.It is separating sieve that the steel ball particle diameter is controlled chute 11.
Machine-made Sand grading adjuster 3 consists of power source 31, the second material guide lining board 32, the first material guide lining board 33, charging aperture wear-resisting ring 34, feed inlet end liner plate 35, charging aperture shell 36, large rolling ring 37, step-by-step movement counterattack hopper 38, the first backing 39, the second backing 40, dust excluding hood 43, discharging opening 44, dedusting hole 45 and maze trough 46; The cylinder both ends are overlapped respectively large rolling ring 37, large rolling ring 37 is positioned on power source 31, dust excluding hood 43 is enclosed within cylinder one end, charging aperture wear-resisting ring 34, feed inlet end liner plate 35 and charging aperture shell 36 form charging aperture, many step-by-step movements counterattack hopper 38 be take three rows or many rows as one group and is adopted the step-by-step movement structure distribution on inner wall of rotary drum, every row's step-by-step movement counterattack hopper 38 on the same group all misplaces and arranges, and the second material guide lining board 32, the first material guide lining board 33 and the first backing 39, the second backing 40 are distributed in respectively many groups stepping hopper two ends.Many rows are that one group of step-by-step movement is while arranging, second group of hopper and the first group of hopper hopper position that misplaces half, same the 3rd group of hopper and second group of hopper are also half hoppers of dislocation, rotate a circle at barrel, material in first group of hopper has half to enter second group, and extracted again new material from feeding mouth, rotated constantly towards discharging opening 44 motions with this.Adopt maze trough 46 respective outer side edges between dust excluding hood 43 and cylinder, dust excluding hood 43 inwalls are equipped with buffering leather packing 41.Dust excluding hood 43 end faces have on peep hole and peep hole to be equipped with to observe and cover 42.The power of Machine-made Sand grading adjuster 3 adopts frequency conversion to adjust rotating speed.Step-by-step movement counterattack hopper 38 is fixing wall type trapezium bucket, the fixation wall upper end wall laterally is welded with counterattack tooth bar 381, fixedly on the part accent of carrying bucket chamber 384 of wall type trapezium bucket, be welded with the first counterattack panel 382, fixedly wall type trapezium bucket front bucket face is the second counterattack panel 383, and fixedly the wall type trapezium bucket back side is assembling panel 385.The material of reaction type stepping hopper own is potassium steel.Counterattack tooth bar 38 cross sections are trapezoidal.Backing 39 consists of arc 391 and Duo Gen helical rack 392, and solder side radian and arc 391 radians that many helical racks 392 equidistantly are welded on 391 of arcs and helical rack 392 match, and have bolt fixing hole 393 on arc 391.Feed inlet end liner plate 35 consists of fanning strip 351 and many toothed rack 352, and many toothed rack 352 radiation spacings are welded on 351 of fanning strips, have bolt fixing hole 353 on fanning strip 351.Polylith feed inlet end liner plate 35 forms charging aperture and tooth bar is positioned at the charging oral cavity.Material guide lining board 32 consists of arc 321 and many toothed rack 322, and many toothed rack 322 spacings are welded on arc 321.
In cylindrical shell, comprised: charging aperture wear-resisting ring 34, fabric type aside-liner 35, the cloth liner plate, reaction type stepping hopper, backing and the labyrinth seal be connected mutually with dust excluding hood partly form.
Power source is that four groups of synchronous frequency-variable speed-regulation motors and two groups of large rolling rings form.
Dust excluding hood part is by the labyrinth seal part is connected with barrel, the dust excluding hood housing, and peep hole, with buffering leather packing composition.
Operation principle is set forth: the Machine-made Sand that needs shaping and adjustment grating and its medium (steel ball: the first-class steel with certain mass of reinforcing bar cutting) sent into endlessly grading adjuster through the charging aperture wear-resisting ring after mixing according to a certain percentage.This Machine-made Sand and steel ball mixture enter after the reconditioner inner chamber the continuous rotation due to grading adjuster, on the fabric type aside-liner be connected in wear-resisting ring under the effect of the shift fork bar of projection material constantly rolled, grinding, advance.
What with the fabric type aside-liner, be connected is the cloth liner plate, and this liner plate and other inner liner plates and hopper are all high manganese steel casting, and the protruding shift fork bar on this liner plate has rolling equally, grinding, the function of feeding.
Along with the continuous rotation of cylindrical shell, mixed material is constantly dialled in reaction type stepping hopper.Rotation along with cylindrical shell, lower floor fills the hopper of mixed material by the continual top that rises to, mixed material when hopper is thus lifted to top in hopper is by under instantaneous throwing, the steel ball left directly impacts on the counterattack face and counterattack bar of the upper plane of following hopper and side, now the Machine-made Sand on these counterattack faces and steel ball are just impacted simultaneously, the counterattack face and counterattack bar of many different knuckles are arranged due to the reaction type stepping hopper design of design again, therefore the steel ball fallen can cause secondary and repeatedly impacting repeatedly, at this, the middle Machine-made Sand that impacts repeatedly is repeated fragmentation.Due to the continuous rotation of cylindrical shell, exist with Machine-made Sand and the steel ball mixture of bottom and constantly rolled again, grinding, again constantly by the next stage bunker lift.
Due to this reaction type stepping hopper to arrange to the discharging opening straight line along cylindrical shell Dan Zucong charging aperture, along the barrel girth with the step-by-step movement Heterogeneous Permutation more than three groups or three groups.Take and be described along three groups of barrel girths as a unit: first hopper head of second row is positioned at the middle part of first hopper of first row, first hopper head of the 3rd row is in the middle part of first hopper of second row, forms by that analogy the stepping principle.
Therefore between first hopper of Shi bottom, the position hopper that first group of top material falls and second hopper, and, along with the rotation of barrel, fallen half material of this hopper is by second bunker lift, by that analogy.Therefore, at material, constantly be raised under throwing, also just constantly pushed ahead by step-by-step movement.
In the middle of the process advanced to discharging opening at material, constantly promoted fragmentation, rolling, grinding.
When material is sent to the discharging opening section for spring and the impulsive force of steel ball in the instantaneous reduction material, therefore designed the backing of reverse installation at discharging section, under the effect of the reverse shift fork bar of backing, through the mixture of broken grinding, lost after the lifting force and form the accumulation area of mixture on backing.The material of this accumulation area, along with the rotation of barrel, constantly is discharged from grading adjuster, enters next workshop section.
The duty of grading adjuster inside is sealing relatively, barrel is interior along with Machine-made Sand constantly is raised whereabouts, constantly be broken, inside will produce a large amount of dust, therefore at the rear portion of this equipment, be equipped with dust excluding hood, and this dust excluding hood is connected with the labyrinth type that is connected to of barrel, make this place not there will be airborne dust, the dust excluding hood upper end has inlet scoop, and the dust produced in barrel enters deduster through inlet scoop, to reduce the content of dust.The dust excluding hood side is spring and the impulsive force that prevents steel ball; therefore inwall is provided with the buffering leather packing; and be provided with peep hole at middle part, so that observe abrasion condition of hopper and liner plate in barrel etc. while shutting down, bottom is provided with discharging opening so that material is transported to next workshop section.
The discharging section lower end is one-level and secondary steel ball separation unit, the operation principle of this one is that head is by the conveyer belt that electromagnetic cylinder is arranged, effect due to electromagnetic cylinder, containing the Machine-made Sand of magnetic, do not throw to second level steel ball separation unit, the steel ball held by the electromagnetic cylinder magnetic action directly enters into chute 1, head in second level steel ball separation unit is also one group of identical electromagnetic cylinder, the comminuted steel shot that the little steel ball be not disposed in processed the first series cylinder and grinding produce.And fall into the steel ball particle diameter simultaneously and control chute 2.At this two-stage steel ball, with after Machine-made Sand separates, the finished product Machine-made Sand enters next machine-processed sand hopper and carries to next workshop section.The steel ball particle diameter is controlled the steel ball particle diameter control section that is out long lumbar hole in chute near leading portion.This section is worn and torn quality, and the steel ball that particle diameter is less than normal and comminuted steel shot are separated to thin steel ball geosyncline.Up-to-standard, the crude steel pearl that particle diameter is qualified is sent into the steel ball bucket and carries in storehouse, passes through in the mixed-hopper that rises to the gradation adjustment machine inlet capable that struggles against the crushing mechanism sand work that circulated.Second level steel ball separation unit is steel ball with after Machine-made Sand separates fully, and the finished product Machine-made Sand enters the finished product hopper and carries and squeeze into the next stage screening installation.
With this constantly circulation production, steel ball in this production line does not produce waste basically, the thin steel ball screened can be used as ball blast and carrys out the classification utilization, steel ball through constantly wearing and tearing has good shot effect, it is the good raw material that cast(ing) surface is processed, the tiny comminuted steel shot reclaimed by electromagnetic cylinder, also can be used as cast raw material and re-used.
Need to understand: although above-described embodiment is to the mentality of designing of the present utility model detailed text description of contrasting; but these text descriptions; just the simple text of the utility model mentality of designing is described; rather than to the restriction of the utility model mentality of designing; any combination, increase or modification that does not exceed the utility model mentality of designing, all fall in protection domain of the present utility model.
Claims (2)
1. a machine-processed natural sand gradation adjustment system, it is characterized in that: charging transmits conveyer belt (1) discharge end directly to steel sand mixed-hopper (2) charging aperture, steel sand mixed-hopper (2) is relative with tower steel ball bucket elevator (15) discharging opening by steel ball charging chute (16), tower steel ball bucket elevator (15) bottom is positioned at a crude steel material geosyncline (14), steel sand mixed-hopper (2) discharging opening is communicated with Machine-made Sand grading adjuster (3) charging aperture, Machine-made Sand grading adjuster (3) dust shield (5) is communicated with deduster (4) by carrier pipe, Machine-made Sand grading adjuster (3) discharging opening is relative with discharging transmission conveyer belt (17) feed end, discharging transmission conveyer belt (17) discharge end top is provided with one-level electromagnetic steel sand separator (6) and one-level electromagnetic steel sand separator (6) discharging opening is relative with steel ball particle diameter control chute (11) groove face by steel ball discharging chute (9), the groove face that the steel ball particle diameter is controlled chute (11) is provided with below steel ball particle diameter control section (12) and steel ball particle diameter control section (12) directly to thin steel particles geosyncline (13), steel ball particle diameter control section (12) discharge end is directly to crude steel particle geosyncline (14) charging aperture, discharging transmits conveyer belt (17) discharge end and directly finished product material is transmitted to conveyer belt (18), finished product material transmission conveyer belt (18) discharge end top is provided with two-stage electromagnetic steel sand separator (7) and two-stage electromagnetic steel sand separator (7) discharging opening is directly controlled chute (11) to the steel ball particle diameter, finished product material transmits conveyer belt (18) discharge end directly to mixing finished product sandy ground groove (10), finished product bucket elevator (8) lower end is positioned at and is mixed into product sandy ground groove (10).
2. machine-processed natural sand gradation adjustment system according to claim 1 is characterized in that: the steel ball particle diameter is controlled chute (11) for separating sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320380664.6U CN203379935U (en) | 2013-06-29 | 2013-06-29 | Machine-made natural sand grading adjusting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320380664.6U CN203379935U (en) | 2013-06-29 | 2013-06-29 | Machine-made natural sand grading adjusting system |
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| CN203379935U true CN203379935U (en) | 2014-01-08 |
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| CN201320380664.6U Withdrawn - After Issue CN203379935U (en) | 2013-06-29 | 2013-06-29 | Machine-made natural sand grading adjusting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350017A (en) * | 2013-06-29 | 2013-10-16 | 浙江双金机械集团股份有限公司 | Machine-manufactured natural sand grading adjustment system and manufacturing method of natural sand |
| CN110976031A (en) * | 2019-10-23 | 2020-04-10 | 安徽中马磁能科技股份有限公司 | Ball milling device for permanent magnetic ferrite grinding reclaimed materials and working method thereof |
| CN112024096A (en) * | 2020-08-21 | 2020-12-04 | 四川蜀磨机械有限公司 | Dry-type sand making system |
-
2013
- 2013-06-29 CN CN201320380664.6U patent/CN203379935U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350017A (en) * | 2013-06-29 | 2013-10-16 | 浙江双金机械集团股份有限公司 | Machine-manufactured natural sand grading adjustment system and manufacturing method of natural sand |
| WO2014205990A1 (en) * | 2013-06-29 | 2014-12-31 | 浙江双金机械集团股份有限公司 | System for regulating the gradation of machine-made natural grit and method of manufacturing natural grit |
| CN103350017B (en) * | 2013-06-29 | 2015-08-26 | 浙江双金机械集团股份有限公司 | The preparation method of machine-made natural sand gradation adjustment system and natural sand |
| CN110976031A (en) * | 2019-10-23 | 2020-04-10 | 安徽中马磁能科技股份有限公司 | Ball milling device for permanent magnetic ferrite grinding reclaimed materials and working method thereof |
| CN112024096A (en) * | 2020-08-21 | 2020-12-04 | 四川蜀磨机械有限公司 | Dry-type sand making system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20150826 |
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| RGAV | Abandon patent right to avoid regrant |