CN111570027A - Rotary rod mill sand making machine - Google Patents
Rotary rod mill sand making machine Download PDFInfo
- Publication number
- CN111570027A CN111570027A CN202010538535.XA CN202010538535A CN111570027A CN 111570027 A CN111570027 A CN 111570027A CN 202010538535 A CN202010538535 A CN 202010538535A CN 111570027 A CN111570027 A CN 111570027A
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- barrel
- wear
- section
- strip
- rotary rod
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- 239000004576 sand Substances 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 208000024780 Urticaria Diseases 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
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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
-
- 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
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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
-
- 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
A rotary rod grinding sand making machine comprises a barrel, a supporting seat and a driving device, wherein two ends of the barrel are respectively mounted on the supporting seat through bearings, a feeding hole is formed in one end of the barrel, the other end of the barrel is in transmission connection with the driving device, a working cavity in the barrel is divided into a crushing section and a discharging section, the crushing section is close to one end of the feeding hole, the length of the crushing section is far larger than that of the discharging section close to the other end of the barrel, a plurality of strip-shaped discharging holes are evenly distributed in the circumference of the position, corresponding to the discharging section, of the inner wall of the working cavity, a plurality of wear-resistant lining plates are evenly distributed in the circumferential direction at the crushing section and the discharging section, a plurality of strip-shaped long holes are respectively formed in the wear-resistant lining plates; a plurality of broken steel bars are arranged in the working cavity, and the length of the broken steel bars is slightly shorter than that of the working cavity. The machining yield is high, the production requirement can be met, and the produced sand material is particularly suitable for the building industry.
Description
Technical Field
The invention relates to a sand making machine, in particular to a rotary rod grinding sand making machine.
Background
The sand is a main raw material in the building industry, and the demand for the sand is increasing along with the high-speed development of the building industry such as houses, roads, bridges and the like. For a long time, people all take natural sand from riverbeds and mountains, the natural sand resources are exhausted, and a large amount of natural sand is mined and dug, so that the vegetation of the riverbeds, dams and sand mountains of a plurality of rivers is seriously damaged. The country has mandated the use of natural sand for mining. China has abundant rock resources and wide distribution, and people begin to grind rocks into sand suitable for buildings and industries by using machines. At present, the prior market has sand making equipment such as a ball mill, a back-beating crusher, a hammer type sand making machine, a conical sand grinding machine, a vertical shaft impact sand making machine and the like, but has the defects of incapability of continuous work, low sand making efficiency, high maintenance cost and easiness in damage of the equipment.
Publication No. CN204429404U discloses a stick system sand machine, including barrel and transmission, its characterized in that: the feeding device and the discharging pipeline are both fixed on the support, and the right end of the cylinder is in transmission connection with the transmission device through a gear; a partition plate for partitioning the barrel into two crushing chambers is arranged in the middle of the interior of the barrel, ore grinding media are arranged in the two crushing chambers, a plurality of through holes are formed in the partition plate, and grinding doors are arranged at the left end and the right end of the barrel; the inner wall of the barrel is fixedly provided with a wear-resistant lining plate, a soft rubber pad is arranged between the wear-resistant lining plate and the inner wall of the barrel, and the wear-resistant lining plate is fixedly connected with the barrel through a bolt.
When the sand making machine works, the qualified sand is discharged from the discharging device through the extrusion and overflow acting forces of the continuously added materials, so that the discharged sand is fine, the discharging yield is low, and the production requirement is difficult to meet.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rotary rod mill sand making machine which has high processing yield, can meet the production requirement and is particularly suitable for the building industry.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a rotation stick mill system sand machine, includes barrel, supporting seat and drive arrangement, the barrel both ends are installed through the bearing respectively on the supporting seat, be equipped with the feed inlet in barrel one end, the barrel other end with the drive arrangement transmission is connected, and its special character is: the working cavity in the cylinder body is divided into a crushing section and a discharging section, the crushing section is close to one end of the feeding hole and the length of the crushing section is far larger than that of the discharging section close to the other end of the cylinder body, a plurality of strip-shaped discharging holes are uniformly distributed on the circumference of the cylinder body wall corresponding to the discharging section, a plurality of wear-resistant lining plates are uniformly distributed on the inner wall of the working cavity along the circumferential direction corresponding to the crushing section and the discharging section, a plurality of strip-shaped long holes are respectively arranged on the wear-resistant lining plates corresponding to the discharging sections, and the strip-shaped long holes are respectively communicated with; a plurality of broken steel bars are arranged in the working cavity, and the length of the broken steel bars is slightly shorter than that of the working cavity and is used for extruding and breaking large materials.
Preferably, the support seat and the driving device are fixed on a support frame, a bottom frame is arranged below the support frame, one end of the support frame is hinged to the bottom frame, and a hydraulic cylinder is arranged between the other end of the support frame and the bottom frame and used for adjusting the inclination angles of the support frame, the cylinder body arranged on the support frame, the support seat and the driving device.
Preferably, a buffer rubber pad is arranged between the wear-resistant lining plate and the inner wall of the cylinder body for reducing the wear of the wear-resistant lining plate.
As further preferred, also the equipartition has a plurality of bar slot hole along the circumferencial direction on the buffer rubber pad that corresponds discharge section department, bar slot hole and bar discharge gate one-to-one to the discharge is smashed good sand material.
Preferably, the width of a discharge channel formed by the strip-shaped long hole and the corresponding strip-shaped discharge hole is gradually increased from inside to outside so as to avoid being blocked by sand.
As further preferred, the opening width of the inboard entry of bar slot hole is 5 ~ 20mm, and bar slot hole opening width reduces to the wear-resisting welt of keeping away from the crushing section by the wear-resisting welt that is close to the crushing section gradually for realize row material in grades.
Preferably, the gap between two adjacent wear-resistant lining plates is 2-5 mm.
Preferably, the diameter of the broken steel bar is 150-200 mm, and the filling area of the broken steel bar is 35-40% of the sectional area of the working cavity in the cylinder.
As a further preference, two ends of the cylinder body are respectively connected with supporting end covers, and the supporting end covers at two ends of the cylinder body are respectively installed on the supporting seat through bearings; wherein the support end cover centre bore that is located barrel one end does the feed inlet, at feed inlet inner wall demountable installation has the feeding auger to change the feeding auger after wearing and tearing.
As further preferred, the feeding auger comprises a sleeve and auger blades welded on the inner wall of the sleeve, and is inserted into the feeding port through the sleeve, an annular blocking plate is fixed at the outer end of the supporting end cover corresponding to the feeding port through bolts, and the inner hole of the annular blocking plate is smaller than the inner diameter of the sleeve and used for preventing the added materials and water flow from overflowing.
The invention has the beneficial effects that:
1. because a plurality of strip-shaped discharge ports are uniformly distributed on the circumference of the position of the cylinder wall corresponding to the discharge section, a plurality of wear-resistant lining plates are uniformly distributed on the inner wall of the working chamber corresponding to the crushing section and the discharge section along the circumferential direction, a plurality of strip-shaped long holes are respectively arranged on the wear-resistant lining plates at the corresponding discharge sections, and a plurality of crushing steel rods loaded into the working chamber passively move along with the rotation of the cylinder to crush the large materials in the cylinder; when the materials are crushed to the granularity smaller than the width of the strip-shaped long hole, the materials are discharged through the strip-shaped discharge hole on the outer wall of the discharge section under the extrusion and water flow scouring effects of the continuously added materials, the processing yield is high, the production requirement can be met, and the produced sand materials are particularly suitable for the building industry.
2. Because supporting seat and drive arrangement fix on a support frame, are equipped with the chassis below the support frame, and support frame one end is articulated with the chassis, is equipped with the pneumatic cylinder between the support frame other end and the chassis, consequently the inclination of support frame and the barrel of establishing on the support frame can be adjusted at any time through controlling the pneumatic cylinder in the during operation, is convenient for smash and the ejection of compact, can improve work efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a sectional view B-B of fig. 1.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a cross-sectional view of a support end cap for a feed port in accordance with the present invention.
In the figure: barrel 1, crushing section 101, row material section 102, bar discharge gate 103, support end cover 2, supporting seat 3, feeding funnel 4, shaft coupling 5, drive arrangement 6, chassis 7, support frame 8, pneumatic cylinder 9, broken steel bar 10, buffering cushion 11, wear-resisting welt 12, bar slot hole 1201, inside lining cover 13, feeding auger 14, annular closure plate 15.
Detailed Description
As shown in fig. 1-5, the rotary rod mill sand making machine according to the present invention comprises a cylinder 1, a supporting seat 3 and a driving device 6, wherein two ends of the cylinder 1 are respectively connected with supporting end covers 2 through bolts uniformly distributed on the circumference, the supporting end covers 2 at two ends of the cylinder 1 are respectively installed on the supporting seat 3 through bearings, and lining covers 13 are respectively fixed on one side of the two supporting end covers 2 corresponding to the cylinder through screws. Wherein the center hole of the supporting end cover 2 at one end of the cylinder body 1 is a feeding hole 201, and a feeding packing auger 14 is detachably arranged on the inner wall of the feeding hole so as to replace the feeding packing auger after being worn.
A feeding hopper 4 is inserted into one end of the feeding hole of the cylinder body 1 and used for guiding materials into the working cavity. The supporting end cover 2 at the other end of the cylinder body 1 is in transmission connection with the driving device 6 through a coupler 5, and the driving device 6 is formed by connecting a motor and a speed reducer.
The inside working chamber of barrel 1 divide into broken section 101 and row material section 102, and broken section 102 is close to feed inlet one end and length are far away than the row material section 102 that is close to the 1 other end of barrel, correspond row material section 102 position circumference equipartition on the 1 outer wall of barrel and have a plurality of bar discharge gate 103, correspond broken section and row material section department and have a plurality of arc wear-resisting welt 12 along the circumferencial direction equipartition respectively at the working chamber inner wall, wear-resisting welt 12 is made by wear-resistant material and is fixed with barrel 1 through a plurality of bolts respectively, and the clearance of two adjacent wear-resisting welts 12 on the circumferencial direction is 2 ~ 5.
A plurality of strip-shaped long holes 1201 are respectively arranged on the wear-resistant lining plate 12 corresponding to the discharge section 102, and the strip-shaped long holes 1201 are respectively communicated with the strip-shaped discharge hole 103 and used for discharging crushed sand. The width of a discharge channel formed by the strip-shaped long hole 1201 and the corresponding strip-shaped discharge hole 103 is gradually increased from inside to outside so as to avoid being blocked by sand. Preferably, the opening width of the inlet at the inner side of the strip-shaped long hole 1201 is 5-20 mm, and the opening width of the strip-shaped long hole 1201 is gradually reduced from the wear-resistant lining plate 12 close to the crushing section 101 to the wear-resistant lining plate 12 far away from the crushing section 101, so that classified discharge is realized, and the grain size of discharged sand is sequentially reduced.
A buffer rubber pad 11 is clamped between the wear-resistant lining plate 12 and the inner wall of the cylinder body 1, and is used for playing a buffer effect and reducing the wear of the wear-resistant lining plate 12. A plurality of strip-shaped long holes are uniformly distributed on the buffer rubber mat 11 at the corresponding discharge section along the circumferential direction, and the strip-shaped long holes correspond to the strip-shaped discharge holes 103 one by one so as to discharge the crushed sand.
A plurality of broken steel bars 10 are arranged in the working cavity, the broken steel bars 10 are made of high manganese steel, and the length of the broken steel bars 10 is slightly shorter than that of the working cavity and is used for extruding and breaking large materials. The diameter of the broken steel bar 10 is phi 150-200 mm, and the filling area of the broken steel bar 10 is 35-40% of the sectional area of the working cavity in the cylinder 1.
The supporting seat 3 and the driving device 6 are respectively fixed on a rectangular supporting frame 8 through bolts, a bottom frame 7 is arranged below the supporting frame 8, one end of the supporting frame 8 is hinged with the bottom frame 7 through a hinge seat and a pin shaft which are symmetrically arranged, a hydraulic cylinder 9 is hinged between the other end of the supporting frame 8 and the bottom frame 7, the lower end of a cylinder body of the supporting frame is hinged on the bottom frame 7, and the upper end of a cylinder rod of the supporting frame is hinged on the bottom surface of the supporting frame 8, so that the inclination angles of the supporting frame 8 and a cylinder body, the supporting seat and.
During operation, the driving device is started to drive the barrel body 1 to rotate, large materials are conveyed into the working cavity through the feeding hopper and the feeding auger under the scouring action of water flow, the crushing steel bar in the working cavity moves passively along with the rotation of the barrel body 1, and the large materials in the barrel body are extruded and crushed. When the materials are crushed to the ideal granularity, the crushed materials in the cylinder are conveyed to a discharging section under the extrusion and water flow scouring effects of the continuously added materials, and are discharged through a discharging channel formed by the strip-shaped long hole and the strip-shaped discharging hole, so that a continuous sand making working mode is formed. During operation, the support frame 8 and the inclination angle of the cylinder body arranged on the support frame are adjusted at any time through the hydraulic cylinder 9, so that crushing and discharging are facilitated, and the working efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a rotation stick mill system sand machine, includes barrel, supporting seat and drive arrangement, the barrel both ends are installed through the bearing respectively on the supporting seat, be equipped with the feed inlet in barrel one end, the barrel other end with the drive arrangement transmission is connected, characterized by: the working cavity in the cylinder body is divided into a crushing section and a discharging section, the crushing section is close to one end of the feeding hole and the length of the crushing section is far larger than that of the discharging section close to the other end of the cylinder body, a plurality of strip-shaped discharging holes are uniformly distributed on the circumference of the cylinder body wall corresponding to the discharging section, a plurality of wear-resistant lining plates are uniformly distributed on the inner wall of the working cavity along the circumferential direction corresponding to the crushing section and the discharging section, a plurality of strip-shaped long holes are respectively arranged on the wear-resistant lining plates corresponding to the discharging sections, and the strip-shaped long holes are respectively communicated with; a plurality of broken steel bars are arranged in the working cavity, and the length of the broken steel bars is slightly shorter than that of the working cavity and is used for extruding and breaking large materials.
2. The rotary rod mill of claim 1, wherein: the support seat and the driving device are fixed on a support frame, a bottom frame is arranged below the support frame, one end of the support frame is hinged to the bottom frame, and a hydraulic cylinder is arranged between the other end of the support frame and the bottom frame and used for adjusting the support frame and the inclination angles of the cylinder body, the support seat and the driving device which are arranged on the support frame.
3. The rotary rod mill of claim 1, wherein: a buffer rubber pad is arranged between the wear-resistant lining plate and the inner wall of the cylinder body and is used for reducing the wear of the wear-resistant lining plate.
4. The rotary rod mill of claim 3, wherein: a plurality of strip-shaped long holes are uniformly distributed on the buffer rubber cushion at the corresponding discharge section along the circumferential direction, and the strip-shaped long holes correspond to the strip-shaped discharge holes one to one so as to discharge the crushed sand.
5. The rotary rod mill of claim 1, wherein: the width of a discharge channel formed by the strip-shaped long hole and the corresponding strip-shaped discharge hole is gradually increased from inside to outside so as to avoid being blocked by sand.
6. The rotary rod mill of claim 5, wherein: the opening width of the inboard entry of bar slot hole is 5 ~ 20mm, and bar slot hole opening width reduces to the wear-resisting welt of keeping away from the broken section gradually by the wear-resisting welt that is close to the broken section for realize row material in grades.
7. The rotary rod mill of claim 1, wherein: the clearance between two adjacent wear-resistant lining plates is 2-5 mm.
8. The rotary rod mill of claim 1, wherein: the diameter of the broken steel bar is 150-200 mm, and the filling area of the broken steel bar is 35-40% of the sectional area of the working cavity in the cylinder.
9. The rotary rod mill of claim 1, wherein: the two ends of the cylinder body are respectively connected with a supporting end cover, and the supporting end covers at the two ends of the cylinder body are respectively arranged on the supporting seat through bearings; wherein the support end cover centre bore that is located barrel one end does the feed inlet, at feed inlet inner wall demountable installation has the feeding auger to change the feeding auger after wearing and tearing.
10. The rotary rod mill of claim 9, wherein: the feeding auger comprises a sleeve and auger blades welded on the inner wall of the sleeve, and is inserted into the feeding port through the sleeve, an annular blocking plate is fixed at the outer end of the supporting end cover corresponding to the feeding port through a bolt, and the inner hole of the annular blocking plate is smaller than the inner diameter of the sleeve and is used for preventing added materials and water flow from overflowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538535.XA CN111570027A (en) | 2020-06-13 | 2020-06-13 | Rotary rod mill sand making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538535.XA CN111570027A (en) | 2020-06-13 | 2020-06-13 | Rotary rod mill sand making machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111570027A true CN111570027A (en) | 2020-08-25 |
Family
ID=72116234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010538535.XA Pending CN111570027A (en) | 2020-06-13 | 2020-06-13 | Rotary rod mill sand making machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111570027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115178350A (en) * | 2022-06-28 | 2022-10-14 | 武汉钢铁有限公司 | Rod mill with strong crushing capacity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB432999A (en) * | 1934-05-12 | 1935-08-07 | Ernest Newell & Company Ltd | Improvements in or relating to grinding and crushing machinery |
| CN205815833U (en) * | 2016-06-27 | 2016-12-21 | 杨沁怡 | Ball milling sand making machine |
| CN206240560U (en) * | 2016-10-08 | 2017-06-13 | 贺州市创伟冶金耐材有限公司 | A kind of ball mill of refractory material |
| CN212237530U (en) * | 2020-06-13 | 2020-12-29 | 辽宁达斯特科技开发有限公司 | Rotary rod mill sand making machine |
-
2020
- 2020-06-13 CN CN202010538535.XA patent/CN111570027A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB432999A (en) * | 1934-05-12 | 1935-08-07 | Ernest Newell & Company Ltd | Improvements in or relating to grinding and crushing machinery |
| CN205815833U (en) * | 2016-06-27 | 2016-12-21 | 杨沁怡 | Ball milling sand making machine |
| CN206240560U (en) * | 2016-10-08 | 2017-06-13 | 贺州市创伟冶金耐材有限公司 | A kind of ball mill of refractory material |
| CN212237530U (en) * | 2020-06-13 | 2020-12-29 | 辽宁达斯特科技开发有限公司 | Rotary rod mill sand making machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115178350A (en) * | 2022-06-28 | 2022-10-14 | 武汉钢铁有限公司 | Rod mill with strong crushing capacity |
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