CN109225483B - Grinding screen system for grinding nonmetallic ore sand production and grinding machine - Google Patents
Grinding screen system for grinding nonmetallic ore sand production and grinding machine Download PDFInfo
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- CN109225483B CN109225483B CN201811158201.9A CN201811158201A CN109225483B CN 109225483 B CN109225483 B CN 109225483B CN 201811158201 A CN201811158201 A CN 201811158201A CN 109225483 B CN109225483 B CN 109225483B
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- 238000000227 grinding Methods 0.000 title claims abstract description 52
- 239000004576 sand Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 43
- 238000012216 screening Methods 0.000 claims abstract description 35
- 239000000428 dust Substances 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 2
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 2
- 206010024796 Logorrhoea Diseases 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000007873 sieving Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 208000031840 Baralle-Macken syndrome Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 229910052839 forsterite Inorganic materials 0.000 description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- -1 tuff Chemical compound 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/02—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with perforated container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/1855—Discharging devices combined with sorting or separating of material with separator defining termination of crushing zone, e.g. screen denying egress of oversize material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/24—Driving mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention belongs to the technical field of crushing and grinding equipment. The utility model provides a garrulous mill of nonmetal ore system sand is screened system, includes screen drum and welt, and the multi-disc the welt is the circumference and is laid in the screen drum, just laid the sieve mesh on the welt, the multi-disc the welt overlaps in proper order end to end and sets up and form broken chamber, each the welt with form relatively independent screening chamber between the screen drum, and adjacent two form the returning charge mouth with the screening chamber intercommunication that corresponds between the welt. Also discloses a nonmetallic ore sand making crushing mill. This application overall structure reasonable in design, it is through between foraminiferous welt and a screen bowl, through returning flitch and striker plate's isolation, forms a plurality of confined ore grinding-screening self-circulation system, and qualified material is in time discharged through a screen bowl, and unqualified material returns broken cavity through returning flitch and continues to be broken to avoided the emergence of smashing the phenomenon, effectively improved the sand production yield.
Description
Technical Field
The invention belongs to the technical field of crushing and grinding equipment, and particularly relates to a nonmetallic ore sand-making crushing and grinding screen system and a crushing and grinding machine.
Background
For a long time, the nonmetallic ore industry in China lacks special crushing and grinding equipment, and the existing sand making equipment mainly has the problems of low yield, high ore grinding energy consumption, serious overgrinding, unreasonable product size distribution and the like. The sand making process commonly used at present comprises the following steps: the method comprises the steps of ore feeding, jaw crusher, rotary kiln, impact crusher and vibrating screen. The foreign sand making equipment mostly adopts the Barmac vertical shaft impact crusher, the domestic PL series is similar to the Barmac vertical shaft impact crusher, but the crushing cavity, the rotor and the like of the Barmac vertical shaft crusher are redesigned according to the requirements of nonmetallic ores, so that the foreign sand making equipment has reasonable sand making degree distribution, and the product contains less powder. At present, the research and development of equipment aiming at the characteristics of nonmetallic ore sand production in China are quite delayed, and the equipment is still in the exploration and development stage, and although the vertical impact crusher is imitated, the equipment is seriously crushed, the energy consumption is higher, and the use effect on the industrial site is not ideal. Therefore, the special efficient grinding equipment for the nonmetallic ore sand production is developed pertinently, and the method has great significance for changing the current situations of unreasonable product structure, resource waste and low efficiency in the nonmetallic ore industry in China, improving the mineral separation efficiency and resource utilization rate of nonmetallic ores in China and driving the technical equipment of the nonmetallic ore industry to progress.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a nonmetallic ore-making sand crushing and grinding sieve system and a crushing and grinding machine, which are provided with a closed ore-grinding and screening self-circulation system, and qualified products are discharged in time to prevent overgrinding, so that the characteristics of high yield, narrow particle size distribution, excellent particle size and low energy consumption are realized.
In order to achieve the above purpose, the technical scheme adopted is as follows:
a nonmetallic ore-making sand grinding screen system, comprising: a screen drum; the lining plates are circumferentially arranged in the screen cylinder, screen holes are arranged on the lining plates, the lining plates are sequentially overlapped end to form crushing cavities, relatively independent screening cavities are formed between each lining plate and the screen cylinder, and a material returning port communicated with the corresponding screening cavity is formed between every two adjacent lining plates; on a plane perpendicular to the axis of the screen drum, the cross section of the lining plate is a smooth curve, the curvature centers of the smooth curves are all located on the axis side of the screen drum, the smooth curve comprises a first section far away from the axis of the screen drum and a second section close to the axis of the screen drum, and the curvature of the first section is larger than that of the second section or the curvature of the first section is equal to that of the second section.
According to the nonmetallic ore-making sand grinding screen system of the present invention, preferably, a third section is disposed between the first section and the second section, and the curvature of the third section is greater than that of the first section.
According to the nonmetallic ore-making sand grinding screen system, preferably, an included angle between a tangent line at the end of the lining plate on the first section and the radial direction of the end is a first constraint angle alpha, and the first constraint angle alpha is 75-110 degrees; the included angle between the tangent line at the end of the lining board on the second section and the radial direction of the end is a second constraint angle beta, and the second constraint angle beta is 60-80 degrees.
According to the nonmetallic ore-making sand grinding screen system of the present invention, preferably, the lining plate includes a first end portion distant from the screen cylinder axis and a second end portion close to the screen cylinder axis, a dimension difference between an outer wall of the first end portion and an inner wall of the second end portion in a radial direction is L, and 2s+20mm.ltoreq.l.ltoreq.2s+50mm, where s is a thickness of the lining plate.
According to the nonmetallic ore-making sand grinding screen system, preferably, 4-8 lining plates are arranged in the screen cylinder.
According to the nonmetallic ore-making sand grinding screen system, preferably, the screen holes on the lining plate are in an inverted cone shape, and the screen holes on the lining plate are in a circular hole or a regular polygon hole.
And a baffle plate is arranged between each lining plate and the screen cylinder, two adjacent baffle plates and corresponding lining plates form the screening cavity, a return plate is arranged at the position of the return opening, sieve holes are arranged on the return plate, and the baffle plates are obliquely arranged.
A nonmetallic ore-making sand pulverizing mill, comprising: a frame; the rotary body is supported and arranged on the frame through a bearing seat, and a feed hopper is arranged at one end of the rotary body; the driving assembly is arranged on the rack and drives the revolving body to act; wherein the rotator comprises: the feeding hopper is arranged corresponding to the feeding screw; and the nonmetallic ore sand-making grinding screen system is arranged between the two end plates in a matched supporting way.
According to the nonmetallic ore sand-making crushing mill, preferably, the frame is also provided with a dust cover, the dust cover is arranged on the outer side of the revolving body in a matching way, and the bottom of the dust cover is provided with a discharge hole; the top of the dust cover is provided with a dust removing opening and is connected with a dust removing device.
According to the nonmetallic ore-making sand grinding machine, preferably, the driving assembly comprises a driving motor, a speed reducer and a coupling; the inner side of the end plate is provided with an inner lining plate, and the end plate is also provided with an access cover.
By adopting the technical scheme, the beneficial effects are that:
(1) this application overall structure reasonable in design, it is through between foraminiferous welt and a screen bowl, through returning flitch and striker plate's isolation, forms confined grinding-screening self-circulation system, and qualified material is in time discharged through a screen bowl, and unqualified material returns broken cavity through returning flitch and continues to be broken to avoided the emergence of smashing the phenomenon, effectively improved the sand production yield.
(2) Aiming at the characteristics of nonmetallic ores, the method combines the throwing type working principle of a ball mill, adopts a crushing mode which mainly adopts impact crushing and is assisted by shearing and extrusion crushing, and realizes the combination of shearing, extrusion and impact crushing through the interaction between an ore grinding medium and materials, thereby obviously improving the crushing ratio; the gravitational potential energy of the grinding medium is fully utilized, and the energy consumption of equipment is effectively reduced; simultaneously, shearing and crushing play a role in shaping materials.
(3) According to the method, through the design of the superposition dislocation layout structure of the multiple lining plates and the curvature change structure of the single lining plate, the kinetic energy and potential energy of the ore grinding medium can be improved, the acting force between the ore grinding medium and the material is further improved, the shearing and extrusion crushing are weakened, the impact crushing is enhanced, and the generation of the material with the fine particle size is reduced to a certain extent; further, the change of welt camber can make the material present as dynamic screening under the drive of welt, can accelerate the material layering for big particle diameter material tends to the surface, and fine particle diameter material tends to the welt and gets into screening chamber, makes ore grinding medium impact at first and collides big particle diameter material, and fine particle diameter material can not receive further impact collision, has reduced the emergence of smashing the phenomenon.
(4) The overall structure of the self-layering type crushing machine realizes the innovative design of screening forms according to particle size self-layering to materials through optimizing and adjusting the crushing forms of the grinding media, so that the whole crushing machine is based on impact crushing of large-particle-size materials and the grinding media, crushing efficiency is improved, particle size distribution of products after crushing can be further optimized, and the characteristic of narrow particle size distribution is realized.
(5) The utility model provides a structural design in a plurality of screening chambeies, its self-loopa effect that can realize entire system, the overruling of fundamentally further reduction fine fraction material, its material can pass through the self-loopa of several times or even ten more than to the non-metal ore sand making process of broken into qualified particle diameter from the feeding, can realize high-efficient, high-frequency screening and feed back from this to reach efficient ejection of compact, efficient breakage and high qualification rate's purpose.
(6) According to the method, the arrangement structure of the plurality of screening cavities is utilized, the stroke of materials in the screening cavities can be further shortened, so that a proper amount of materials can be rapidly screened and fed back in a limited stroke, excessive materials are prevented from entering a single screening cavity, and meanwhile, the situation that large-particle-size materials flow in the screening cavities for a long time to cause local accumulation and blockage is avoided; this application is through the setting of specific screening chamber quantity and the setting of corresponding sieve mesh size for the material volume that gets into single screening chamber is moderate, and makes the material volume in the single screening chamber satisfy the characteristics of fully screening and quick returning charge, guarantees that the material of qualified particle diameter fully sieves the discharge, avoids returning crushing chamber again and causes the crushing.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description will briefly explain the drawings of the embodiments of the present invention. Wherein the showings are for the purpose of illustrating some embodiments of the invention only and not for the purpose of limiting the same.
Fig. 1 is a schematic structural view of a nonmetallic ore-making sand pulverizing and grinding screen system according to an embodiment of the present invention, which shows the positional relationship of the respective components.
Fig. 2 is a schematic cross-sectional structure of a nonmetallic ore-making sand crushing and grinding screen system, the structure of a crushing cavity and a screening cavity according to an embodiment of the invention.
Fig. 3 is a schematic view of a screening chamber according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a lining board according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a nonmetallic ore-making sand pulverizing mill according to an embodiment of the present invention.
Number in the figure:
100 is a frame, 101 is a feed hopper, 102 is a bearing seat;
200 is a revolving body, 210 is an end plate, 211 is an inner lining plate, 212 is an access cover, 220 is a revolving shaft, 230 is a feed screw, 240 is a screen cylinder, 250 is a lining plate, 251 is a screen hole, 252 is a first section, 253 is a second section, 254 is a third section, 260 is a screening cavity, 261 is a return opening, 262 is a return plate, 263 is a baffle plate;
301 is a driving motor, 302 is a speed reducer, and 303 is a coupling;
400 is a dust cover and 401 is a dust removal port.
Detailed Description
In order to make the objects, technical features and technical effects of the technical solution of the present invention more clear, an exemplary solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present invention.
Referring to fig. 1-4, the invention discloses a grinding and sieving system for nonmetallic ore sand, which is suitable for grinding nonmetallic ore sand such as forsterite, wollastonite, tuff, perlite and the like, and specifically comprises a sieving cylinder 240 and a lining plate 250, wherein a plurality of lining plates 250 are circumferentially arranged in the sieving cylinder 240, sieve holes 251 are arranged on the lining plates 250, the lining plates 250 are sequentially overlapped end to form a crushing cavity, a relatively independent sieving cavity 260 is formed between each lining plate 250 and the sieving cylinder 240, and a return port 261 communicated with the corresponding sieving cavity is formed between two adjacent lining plates; on the plane perpendicular to the axis of the screen drum, the cross section of the lining plate is a smooth curve, the curvature centers of the smooth curves are all located on the axis side of the screen drum, the smooth curve comprises a first section 252 far away from the axis of the screen drum and a second section 253 close to the axis of the screen drum, the curvature of the first section 252 is larger than that of the second section 253, or the curvature of the first section 252 is equal to that of the second section 253, so that the change of the action form between the grinding medium and the material can be realized, and the material is enabled to flow in a layered screening mode according to the particle size.
6 lining plates are arranged in the screen cylinder 240 in the embodiment, and the screen holes on the lining plates 250 are in an inverted cone shape, so that materials can flow out conveniently, and the screen holes on the lining plates are in a circular hole or a regular polygon hole.
Fig. 2 and 3 of the present embodiment show a smooth curve structure with the same curvature of the first section 252 and the second section 253, and fig. 4 shows that the curvatures of the first section and the second section are different, and a third section 254 is disposed between the first section 252 and the second section 253, and the curvature of the third section 254 is larger than that of the first section 252.
Further restricting and limiting specific structural parameters of each section, wherein an included angle between a tangent line at the end of the lining plate on the first section and the radial direction of the end is a first restriction angle alpha, and the first restriction angle alpha is 75-110 degrees; the included angle between the tangent line at the end of the lining board on the second section and the radial direction of the end is a second constraint angle beta, and the second constraint angle beta is 60-80 degrees.
In addition, the size of the material returning opening is limited, the lining plate comprises a first end part far away from the axis of the screen cylinder and a second end part close to the axis of the screen cylinder, the dimension difference between the outer wall of the first end part and the inner wall of the second end part in the radial direction is L, 2s+20mm is less than or equal to L and less than or equal to 2s+50mm, and s is the thickness of the lining plate, so that the material returning of the large-particle-size material in the screening cavity is ensured.
For the composition of screening cavity, it is through being provided with striker plate 263 between each welt and screen bowl, and adjacent two striker plates 263 and corresponding welt 250 form screening cavity 260, and return port 261 department is provided with returning charge plate 262, has laid the sieve mesh on the returning charge plate 262, and striker plate 263 is the slope setting to the material of being convenient for flows out from the returning charge port, the orientation of returning charge port 261 is opposite with the rotation direction of screen bowl, thereby the material of being convenient for flows out at gravity effort.
Referring to fig. 5, the application also discloses a nonmetallic ore-making sand grinding machine, which comprises a frame 100, a revolving body 200 and a driving assembly, wherein the revolving body 200 is supported and arranged on the frame 100 through a bearing seat 102, and a feed hopper 101 is arranged at one end of the revolving body 200; the driving assembly is arranged on the frame 100 and drives the revolving body 200 to act, and the driving assembly comprises a driving motor 301, a speed reducer 302 and a coupling 303.
The revolving body 200 comprises two end plates 210 which are correspondingly arranged left and right and a nonmetallic ore sand grinding sieve system in the embodiment, a revolving shaft 220 is arranged between the two end plates 210, a feeding spiral 230 is arranged on one end plate 210, and a feeding hopper 101 is correspondingly arranged with the feeding spiral 230; the nonmetallic ore-making sand grinding screen system is arranged between the two end plates 210 in a matched supporting way. Inside the end plate 210, an inner lining 211 is provided, and an access cover 212 is also provided on the end plate 210.
The frame 100 is also provided with a dust cover 400 which can be divided into an upper cover shell and a lower cover shell and is fixedly connected through bolts, the dust cover 400 is arranged on the outer side of the revolving body 200 in a matching way, and the bottom of the dust cover 400 is provided with a discharge hole; a dust removing opening 401 is arranged at the top of the dust cover 400 and is connected with a dust removing device.
The mesh size of the returning plate is 20-30mm for the design of the mesh size of each part. The size of the sieve holes on the lining plate is 15-25mm, and the size of the sieve holes on the sieve cylinder is determined according to the upper limit of the granularity of the sand making product.
The utility model discloses an adopt central transmission, unilateral feed, the operational mode of edge unloading, the inside structural design that adopts double-deck modularization of barrel, the inlayer is wear-resisting foraminiferous welt, and the skin is closed screen drum, forms confined grinding-screening self-circulation system in the complete machine operation process. The inner part of the rotary body is divided into a crushing and grinding area and a screening area, a perforated lining plate forms a closed crushing and grinding area, and a plurality of screening areas are formed between the perforated lining plate and the screen cylinder. When the equipment works, the driving motor drives the speed reducer to operate through the coupler, after the speed reducer is decelerated, the speed reducer is used for driving the revolving body to rotate, when the revolving body rotates, materials are fed from the feed hopper and are led into the revolving body through the feed screw, the grinding medium and the materials in the grinding area are driven by the perforated lining plate to continuously perform projectile motion under the combined action of friction force, centrifugal force and self gravity, the materials are crushed under the shearing, extrusion and impact actions of the grinding medium, the crushed materials are discharged through the perforated lining plate, enter the screening area for classification, the materials meeting the granularity requirement are discharged out of the machine in time through the screen cylinder to form qualified products, and the materials with the size larger than the screen holes are returned to the grinding area again through the material returning plate for grinding operation.
Examples: the granularity requirement of a qualified product of forsterite sand production in the current market is 1-6mm, 1.5 tons of certain forsterite sample in Henan is collected, a sand production test is carried out by adopting a crushing mill, the granularity upper limit of a finished product of the test sand production is 6mm, and the feeding is a +6mm grain grade material of the collected sample, and the test result is shown in table 1. The test result shows that the sand production yield of the crushing mill is 57.95 percent, which is 14.48 percent higher than the yield 43.47 percent of the double-roller crusher used on site.
TABLE 1 particle size composition of crushed mill sand product
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.
The term "substantially" as used herein is understood to be within the normal tolerances in the art, e.g., within two standard deviations of the average value, unless the context specifically specifies or clearly indicates. "substantially" is understood to be within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the set point. Unless otherwise clear from context, all numerical values provided herein can be modified by the term "substantially".
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims does not necessarily imply a limitation on the amount. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "connected" or "connected" and the like are not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
While the exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and adaptations can be made to the above-described specific embodiments and that various combinations of the features and structures can be made without departing from the scope of the present invention as defined in the appended claims.
Claims (7)
1. A nonmetallic ore-making sand grinding screen system, comprising:
a screen drum; and
the lining plates are circumferentially arranged in the screen cylinder, screen holes are arranged on the lining plates, the lining plates are sequentially overlapped end to form crushing cavities, relatively independent screening cavities are formed between each lining plate and the screen cylinder, and a material returning port communicated with the corresponding screening cavity is formed between every two adjacent lining plates;
on a plane perpendicular to the axis of the screen drum, the cross section of the lining plate is a smooth curve, the curvature centers of the smooth curves are all located on the axis side of the screen drum, the smooth curve comprises a first section far away from the axis of the screen drum and a second section close to the axis of the screen drum, and the curvature of the first section is larger than that of the second section or the curvature of the first section is equal to that of the second section;
the lining plate comprises a first end part far away from the axis of the screen cylinder and a second end part close to the axis of the screen cylinder, wherein the dimension difference between the outer wall of the first end part and the inner wall of the second end part in the radial direction is L, and 2s+20mm is less than or equal to L and less than or equal to 2s+50mm, wherein s is the thickness of the lining plate;
the sieve holes on the lining plate are in an inverted cone shape, and the sieve holes on the lining plate are in a circular hole or a regular polygon hole;
and a baffle plate is arranged between each lining plate and the screen cylinder, two adjacent baffle plates and corresponding lining plates form the screening cavity, a return plate is arranged at the position of the return opening, sieve holes are arranged on the return plate, and the baffle plates are obliquely arranged.
2. The nonmetallic ore-making sand pulverizing screen system of claim 1, wherein a third section is disposed between the first section and the second section, the third section having a curvature greater than the curvature of the first section.
3. The nonmetallic ore-making sand pulverizing and grinding screen system according to claim 1, wherein an included angle between a tangent line at the liner end on the first section and a radial direction of the end is a first constraint angle α, and the first constraint angle α is 75-110 °; the included angle between the tangent line at the end of the lining board on the second section and the radial direction of the end is a second constraint angle beta, and the second constraint angle beta is 60-80 degrees.
4. The nonmetallic ore-making sand grinding screen system according to claim 1, wherein 4-8 lining plates are arranged in the screen cylinder.
5. A nonmetallic ore-making sand pulverizing mill, characterized by comprising:
a frame;
the rotary body is supported and arranged on the frame through a bearing seat, and a feed hopper is arranged at one end of the rotary body; and
the driving assembly is arranged on the rack and drives the revolving body to act;
wherein the rotator comprises:
the feeding hopper is arranged corresponding to the feeding screw; and
a nonmetallic ore-made sand grinding screen system as set forth in any one of claims 1-4, wherein the nonmetallic ore-made sand grinding screen system is matingly supported and disposed between the two end plates.
6. The nonmetallic ore sand-making grinding machine according to claim 5, wherein a dust cover is further arranged on the frame, the dust cover is arranged on the outer side of the revolving body in a matching mode, and a discharge hole is formed in the bottom of the dust cover;
the top of the dust cover is provided with a dust removing opening and is connected with a dust removing device.
7. The nonmetallic ore-making sand pulverizing mill of claim 5, wherein the drive assembly comprises a drive motor, a reducer, and a coupling;
the inner side of the end plate is provided with an inner lining plate, and the end plate is also provided with an access cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158201.9A CN109225483B (en) | 2018-09-30 | 2018-09-30 | Grinding screen system for grinding nonmetallic ore sand production and grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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