CN1126109A - Concave ball mill - Google Patents
Concave ball mill Download PDFInfo
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- CN1126109A CN1126109A CN 95100307 CN95100307A CN1126109A CN 1126109 A CN1126109 A CN 1126109A CN 95100307 CN95100307 CN 95100307 CN 95100307 A CN95100307 A CN 95100307A CN 1126109 A CN1126109 A CN 1126109A
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- mill
- ball mill
- recessed formula
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- partition panel
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Abstract
The concave-type ball-grinding mill for ore is composed of cylindrical body, liner plate, material feed port and discharge port, and features use of concave bulkhead and concave tail sieving plate in such shape that they are arranged on cross-section of cylindrical body and concave axially towards discharge port to form hollow rotating body such as semi-ball or truncated cone, resulting in that "over-grinding" and "inactive region" in tail babin are eliminated for high output and fineness.
Description
The invention belongs to of the invention of industry ore grindings such as building materials, metallurgy, chemical industry with ball mill.
In traditional ball mill, coarse crushing and corase grind effect are mainly played to material in the corase grind storehouse, experimental results show that steel ball with material grinding behind a certain particle diameter, continuing to use the steel ball grinding will be poor efficiency, this specific boundary particle diameter is referred to as " critical particle diameter ".Before material advances mill the material of part particle diameter less than " critical particle diameter " arranged promptly, other is slightly larger than the fines of " critical particle diameter ", becomes the material less than " critical particle diameter " after steel ball impacts very soon.The tradition ball mill is passive side screening to the screening of this part material, thereby it is a poor efficiency for this part thing grain separation less than " critical particle diameter ", thereby cause the waste of corase grind storehouse grinding power, because this part material can not separate as early as possible and enter the fine grinding of fine grinding storehouse, equaled to prolong the time of staying of these materials, thereby caused " crossing grinding " material to occur in a large number in the corase grind storehouse.Cross grinding material and be mingled in the waste that has aggravated corase grind power in the coarse fodder again, form vicious circle.
Also there is a kind of like this phenomenon in tradition ball milling tail storehouse, in one section zone near former plate shaped mill tail sheet plate, material will enter quill shaft by mill tail sheet plate and draw off outside the mill, be milled to finished product at this regional material, granularity is minimum, good fluidity, so flow velocity is fast, residence time of material seems less a lot of with comparing away from the time of staying in same one section zone of mill tail sheet plate, in addition, measuring screen analysis curve in ordinary production can obviously find, is poor efficiency at this regional abrasive body to the grinding of material, sometimes even invalid.We are called this zone " district of losing efficacy ", and are well-known, the length of typing ball mill after installation generally be constant, can not change, the length of ball mill and diameter are to being played crucial effects by the product of grinding material, quality.And use the ball mill of plate shaped mill tail sheet plate " to lose efficacy and distinguish " as above-mentioned existing, its existence has reduced this regional grinding efficiency, that is has shortened effective active length of grinding machine, and then has influenced output and quality.
Though the Chinese patent communique discloses the patent that a kind of name is called " protruding formula ball mill " (patent No. 93238037.9) on October 5th, 1994.Though this ball mill has overcome many disadvantages that conventional mill exists, but also exist some deficiency, the protruding formula partition panel that adopts in the protruding formula grinding machine is to protrude to feeding end, put in the corase grind storehouse, and abrasive body rotates with cylindrical shell and is brought to certain altitude and leaves again in the corase grind storehouse, its movement locus is " a waterfall stream ", and abrasive body takes lower position to cylindrical shell in the fine grinding storehouse, slide then and form " laminar flow ", for the less grinding machine of draw ratio, protruding formula partition panel stretches to the corase grind storehouse will influence abrasive body movement locus in the storehouse, occupy the effective swept volume in the storehouse.That is: protruding formula ball mill is well suited for for the grinding machine than big L/D ratio, and less draw ratio grinding machine is had weak point, and it does not propose better scheme to increasing the grinding material specific area.
The present invention aims to provide a kind of concave ball mill, can overcome many disadvantages of traditional ball mill, can eliminate the weak point that protruding formula ball mill exists again, and provides a kind of more positive scheme to the fineness of grinding machine grinding material.Can realize high yield, high thin, this target of low consumption.
The present invention is that partition panel, the mill tail sheet plate to former traditional ball mill changes, and has adopted new type of component, according to concrete grinding fineness each storehouse abrasive body rational allocation is formed.Its embodiment is that recessed formula partition panel, recessed formula mill tail sheet plate are installed in grinding mill barrel.Recessed formula partition panel and recessed formula mill tail sheet plate are to recessed hollow rotating body, the i.e. shapes such as hollow semicircle sphere, round platform, cone of becoming of discharge end at its horizontal axis of upper edge, ball mill barrel cross section.With round platform is good, and recessed formula mill tail sheet plate is made up of material-blocking plate and sieve flitch two parts, in the annular space that material-blocking plate, sieve flitch, cylindrical shell etc. surround jointly helical blade is installed also.And in use adjust each storehouse grinding body gradation according to concrete grinding situation.
Use the present invention to have following obvious advantage and effect, recessed formula partition panel carries out effectively and reasonably screening to material, overcome a storehouse " grinding excessively " phenomenon, to in time shift the fine grinding of fine grinding storehouse less than the material of " critical particle diameter ", compare with protruding formula grinding machine that partition panel is recessed to discharge end in the recessed formula grinding machine, promptly stretch to the fine grinding storehouse.And the work track of abrasive body grinding material is to slide in the fine grinding storehouse, belong to " laminar flow ", therefore, can not bring adverse effect to abrasive body work track, and adopted recessed formula mill tail sheet plate in the tail storehouse, eliminated " district of losing efficacy ", that is equaled to have prolonged the effective active length of grinding machine, for grinding machine high yield, height carefully provide advantage.Especially can improve the cement granules structure increasing substantially mill output, reducing the specific area that increases pulverizing cement under power consumption, the ball consumption situation to pulverizing cement.When same grog and same composite material proportioning, can improve cement grade.
But the present invention both new mechanism makes, but also retrofitting of used machine.Not only can make single storehouse or many storehouses into, also can be used in combination, to adapt to the requirement of various material situations of different manufacturers and specific surface area of finished products with tabular individual layer partition panel, double-layered isolating plate, protruding formula partition panel etc.Concave ball mill has small investment, short, benefit advantages of higher of duration when carrying out retrofitting of used machine.
Most preferred embodiment of the present invention is illustrated with reference to the following drawings.
Figure (1) is a concave ball mill general assembly schematic diagram.
Figure (2) is concave ball mill A among the figure (1)-A cutaway view.
Figure (3) is the recessed formula partition panel schematic diagram that uses among the figure (1).
Figure (4) is figure (a 3) concave formula partition panel side view.
Figure (5) is figure (a 1) concave formula mill tail sheet plate schematic diagram.
Figure (6) is figure (5) concave formula mill tail sheet plate B-B cutaway view.
Figure (7) is to use the concave ball mill general assembly schematic diagram of pellet separating plate.
Figure (8) is the schematic diagram of the pellet separating plate of use among the figure (7).
Figure (9) is a pellet separating plate side view among the figure (8).
Figure (10) is a kind of modified of concave ball mill.
Figure (11) is the another kind of modified of concave ball mill.
Figure (12) is another modified of concave ball mill.
Figure (13) is the further modified of concave ball mill.
Referring to figure (1) as seen, this ball mill is made up of feed end (1), cylindrical shell (2), liner plate (3), recessed formula partition panel (4), recessed formula mill tail sheet plate (5), helical blade (6), discharge end (7) etc., by scheming (3) and figure (4) as seen, have some combs hole on recessed formula partition panel, hole width is 2mm to 12mm.Also can have some little comb holes or not perforate at recessed formula partition panel near cylindrical shell and with the perpendicular zone of grinding machine horizontal axis, opening aperture is in order to increase draught area, to strengthen mill inner ventilation.When opening aperture, hole width is 2mm to 5mm.There is screw at two ends at it, are used for by bolt it and center ring and cylindrical shell being tightened together.
Referring to scheming (5) and figure (6) as seen, also have some combs hole on the recessed formula mill tail sheet plate, hole width is 3mm to 6mm.Also have screw on it, it is in the same place by bolted with flange.By figure (1), figure (6) as seen, it is made up of two parts, near bistrique and perpendicular to this plate part of grinding machine horizontal axis is its material-blocking plate (8), be sieve flitch (9) near the mill tail and to recessed this part of hollow rotating body that becomes of mill tail, can have some little comb holes or not perforate on material-blocking plate, hole width is 2mm to 5mm when opening little comb hole.The material-blocking plate height is paved the vertical height that the back forms and is advisable to be not more than grinding machine tail storehouse abrasive body.These two parts can be formed by wear-resisting steel alloying for small-sized grinding machine, to large-sized grinder for alleviating its weight, but individual cast is assembled into one again in machine.The cavity, center that material-blocking plate surrounds in machine is " discharging hole ".The hollow rotating body that the sieve flitch constitutes in machine is " discharge chamber ".Referring to figure (1), in the annular space that discharge chamber, material-blocking plate, cylindrical shell surround jointly,, turn to according to grinding machine helical blade (6) also is installed for quickening discharging.
Sometimes the material size of grinding material is bigger, for accelerating recessed formula partition panel to thickness material separating rate, can near feeding end one side pre-screening plant be installed at recessed formula partition panel---and pellet separating plate (10), its detail drawing is referring to figure (7).Pellet separating plate shape is seen figure (8), figure (9).Also have some big combs hole on it, hole width is 5mm to 25mm.
Material will be in a large number less than the material of " critical particle diameter " by the recessed formula partition panel in preceding storehouse, and separation enters the fine grinding storehouse fast through the front, flow to recessed formula mill tail sheet plate, and a large amount of fineves accumulate near this zone of material-blocking plate, i.e. " lost efficacy and distinguish " of former traditional ball mill.Owing to only have a few small holes or atresia on the material-blocking plate, the deceleration so fines is obstructed in this zone up to " charge level " that mix at this regional fines and abrasive body, is crossed " the discharging hole " that material-blocking plate surrounds and is entered " discharge chamber ", draws off outside the mill then.Material rotates with grinding machine and constantly to be ground by abrasive body in the process of assembling, and has so just eliminated " district of losing efficacy ", and former " district of losing efficacy " become " efficient district " to the material high-efficient grinding.Thereby guaranteed should zone (section) ratio of grinding media to material constant relatively.
Concave ball mill according to each factory's process conditions and mill feed material size, can only use certain part in recessed formula partition panel or the recessed formula mill tail sheet plate in producing use, also can finish high yield, high thin this purpose.
Claims (10)
1, a kind of concave ball mill, form by feed end, cylindrical shell, liner plate etc., it is characterized in that being equipped with in the mill recessed formula partition panel and recessed formula mill tail sheet plate, recessed formula partition panel and recessed formula mill tail sheet plate are to be recessed into hollow rotating body at its horizontal axis of upper edge, ball mill barrel cross section to discharge end, promptly are recessed into shapes such as hollow semicircle sphere, round platform, cone.
2, concave ball mill according to claim 1 is characterized in that having some combs hole on the recessed formula partition panel, and hole width is 2mm to 12mm.
3, concave ball mill as claimed in claim 1 or 2, it is characterized in that on the recessed formula partition panel near cylindrical shell and with the perpendicular zone of grinding machine horizontal axis on can have some little comb holes or not perforate, hole width is 2mm to 5mm during perforate.
4, as concave ball mill as described in the claim 3, it is characterized in that on the recessed formula partition panel pellet separating plate being installed, its comb hole width is 5mm to 25mm.
5, as concave ball mill as described in claim 1 or 4, it is characterized in that having some combs hole on the recessed formula mill tail sheet plate, hole width is 3mm to 6mm.
6, as concave ball mill as described in claim 1 or 5, it is characterized in that recessed formula mill tail sheet plate is combined by material-blocking plate and sieve flitch, can separately make, in mill, be installed as one again, also can close and make one.
7, as concave ball mill as described in the claim 6, it is characterized in that having some little comb holes or not perforate on the material-blocking plate of recessed formula mill tail sheet plate, hole width is 2mm to 5mm when opening aperture.
8,, it is characterized in that the height of material-blocking plate in the recessed formula mill tail sheet plate is advisable with the vertical height that is not more than after tail storehouse abrasive body is paved as concave ball mill as described in claim 1 or 7.
9,, it is characterized in that in material-blocking plate, sieve flitch, cylindrical shell surround jointly in the recessed formula mill tail sheet plate of tail storehouse the annular space helical blade being installed as concave ball mill as described in claim 1 or 8.
10,, it is characterized in that recessed formula partition panel, recessed formula mill tail sheet plate also can be used in combination Cheng Dancang or compartment mill with tabular individual layer partition panel, double-layered isolating plate, protruding formula partition panel etc. as concave ball mill as described in claim 1 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95100307 CN1126109A (en) | 1995-01-01 | 1995-01-01 | Concave ball mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95100307 CN1126109A (en) | 1995-01-01 | 1995-01-01 | Concave ball mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1126109A true CN1126109A (en) | 1996-07-10 |
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ID=5073372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95100307 Pending CN1126109A (en) | 1995-01-01 | 1995-01-01 | Concave ball mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1126109A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607285A (en) * | 2015-01-31 | 2015-05-13 | 江西新金叶实业有限公司 | Novel ball grinding mill |
| CN107127045A (en) * | 2017-06-26 | 2017-09-05 | 北矿机电科技有限责任公司 | From grading plant inside a kind of vertical screw agitating mill |
| CN107175153A (en) * | 2017-07-26 | 2017-09-19 | 山东晶石新材料有限公司 | A kind of ball mill device |
| CN107670783A (en) * | 2017-11-13 | 2018-02-09 | 盐城吉达环保设备有限公司 | A kind of ball mill center resistance material device |
-
1995
- 1995-01-01 CN CN 95100307 patent/CN1126109A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607285A (en) * | 2015-01-31 | 2015-05-13 | 江西新金叶实业有限公司 | Novel ball grinding mill |
| CN107127045A (en) * | 2017-06-26 | 2017-09-05 | 北矿机电科技有限责任公司 | From grading plant inside a kind of vertical screw agitating mill |
| CN107127045B (en) * | 2017-06-26 | 2024-01-05 | 北矿机电科技有限责任公司 | Inside self classification device of vertical spiral stirring mill |
| CN107175153A (en) * | 2017-07-26 | 2017-09-19 | 山东晶石新材料有限公司 | A kind of ball mill device |
| CN107670783A (en) * | 2017-11-13 | 2018-02-09 | 盐城吉达环保设备有限公司 | A kind of ball mill center resistance material device |
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