CN102941142B - Central-discharged drying-grinding mill with variable cylinder diameter - Google Patents
Central-discharged drying-grinding mill with variable cylinder diameter Download PDFInfo
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- CN102941142B CN102941142B CN201210395485.XA CN201210395485A CN102941142B CN 102941142 B CN102941142 B CN 102941142B CN 201210395485 A CN201210395485 A CN 201210395485A CN 102941142 B CN102941142 B CN 102941142B
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- 238000000227 grinding Methods 0.000 title claims abstract description 134
- 238000001035 drying Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 8
- 238000009837 dry grinding Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000007599 discharging Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 8
- 239000002893 slag Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000205 computational method Methods 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
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a central-discharged drying-grinding mill with variable cylinder diameter. The central-discharged drying-grinding mill comprises a head hollow shaft, a drying chamber, a coarse grinding chamber, a material-discharging chamber, a fine grinding chamber and a tail hollow shaft which are successively connected, wherein the inner diameter of the cylinders of the drying chamber and the coarse grinding chamber is larger than that of the cylinder of the fine grinding chamber; the coarse grinding chamber and the fine grinding chamber are fixedly connected through a truncated cone cylinder-shaped material-discharging chamber; and the drying chamber, the coarse grinding chamber, the material-discharging chamber and the fine grinding chamber are successively connected to constitute a mill cylinder. Preferably, the inner diameter of the head hollow shaft is larger than that of the tail hollow shaft; and the inner diameter ratio of the coarse grinding chamber to the fine grinding chamber is between 1.15 and 1.25. The central-discharged drying-grinding mill with variable cylinder diameter provided by the invention can effectively increase grinding efficiency and drying efficiency by designing cylinder match, speed set and power of the central-discharged drying-grinding mill, without changing original grinding process systems and auxiliary configurations.
Description
Technical field
The invention belongs to Inorganic Non-metallic Materials crushing technology field, specially refer to a kind of change in barrel dliameter and unload oven dry grinding machine.
Background technology
In unload dry grinding machine (hereinafter to be referred as in unload mill) be a kind of ball mill, be usually used in cement industry raw material prepare.Its grinding flow process (as shown in Figure 1) comprising: raw material unloads the warehouse for drying I of mill in being entered by head quill shaft 11, under the effect of lifting blade 12, fully contact and carry out heat exchange with the thermal current that quill shaft 11 is blown into from the head, after preliminary oven dry, enter coarse grinding cabin II through partition panel 13, impacted by abrasive body and broken and continue to be dried at coarse grinding cabin II, overflow from discharging grate plate 15 again, discharge outside grinding mill barrel 16 through the discharge bin III at middle part, through collecting, rise to powder concentrator, qualified fine powder is sent into raw material homogenizing silo to select particle diameter, remaining coarse granule enters fine grinding storehouse IV from afterbody quill shaft 19 respectively in proportion, or quill shaft 11 enters coarse grinding cabin II from the head, after pulverizing again, overflow from the discharging grate plate 15 in two storehouses respectively again, discharge through discharge bin III, collect together again, be promoted to powder concentrator, so circulation, form closed-circuit grinding system.
The feature of prior art is unloaded mill warehouse for drying I, coarse grinding cabin II, discharge bin III in being are identical with the internal diameter of fine grinding storehouse IV four part cylindrical shells, connect firmly into the grinding mill barrel 16 of a hollow, under the drive of transmission gear ring 18, have rotated together grinding operation.This has just caused the abrasive body impulsive force in coarse grinding cabin II on the weak side, and abrasive body in the IV of fine grinding storehouse is because of the dynamic low grinding effect that affects of compactness, and this is also the contradiction that drum's speed of rotation designs medium-term and long-term existence.For this reason, researcher has developed various different liner plates and has improved this problem.In existing, unload in mill, in coarse grinding cabin II, be equipped with ladder lining board 14 with promote abrasive body leave height, but act on limited, and reduced mill in the useful space; Rush down drop height degree and corrugated liner 17 is housed in the IV of fine grinding storehouse to reduce abrasive body, but still can not allow rotating speed too high, therefore should not be used for the grinding of the industrial residues such as slag, slag, carbide slag.
Simultaneously, can obviously find out from aforesaid grinding flow process: the inventory that quill shaft 11 enters warehouse for drying I and coarse grinding cabin II from the head must be greater than the inventory that enters fine grinding storehouse IV from afterbody quill shaft 19, throughput is also the same, therefore, usually occur that aborning coarse grinding cabin II mono-side material flows smooth and the excessive problem of gas-flow resistance.
Summary of the invention
For above-mentioned technical background, propose a kind of change in barrel dliameter and unload oven dry grinding machine, it has good grinding effect, can effectively improve mill efficiency and drying efficiency.
A kind of change in barrel dliameter provided by the invention unloaded oven dry grinding machine, comprises the head quill shaft, warehouse for drying, coarse grinding cabin, discharge bin, fine grinding storehouse and the afterbody quill shaft that connect successively.It is characterized in that, warehouse for drying and coarse grinding cabin cylinder internal diameter are all greater than the cylinder internal diameter in fine grinding storehouse, coarse grinding cabin is fixedly connected with by the cylinder-shaped described discharge bin of frustum of a cone with fine grinding storehouse, and warehouse for drying, coarse grinding cabin, discharge bin and fine grinding storehouse connect and compose grinding mill barrel successively.
As the improvement of technique scheme, the internal diameter of head quill shaft is greater than the internal diameter of afterbody quill shaft.
As the further improvement of technique scheme, the ratio of coarse grinding cabin and fine grinding storehouse cylinder internal diameter is between 1.15 ~ 1.25.
As the further improvement of technique scheme, the actual speed of coarse grinding cabin compares K
s1be 0.73 ~ 0.78.
As further improving again of technique scheme, the actual speed in fine grinding storehouse compares K
s2be 0.68 ~ 0.71.
In change barrel dliameter provided by the invention, unload and dry the grinding machine cylindrical shell coupling, speed setting and the power that unload mill by centering and design, without changing original grinding process system and auxiliary configuration.Compared with prior art, the present invention has following technical characterstic:
(1) because coarse grinding cabin is different from the fine grinding storehouse effective internal diameter of cylindrical shell, under same rotating speed, have different rotating ratios.Coarse grinding cabin rotating ratio is 0.73 ~ 0.78, and its abrasive body is mainly rendered as cast and decline movement, has strong impact comminution effect, is suitable for coarse crushing; Fine grinding storehouse rotating ratio is 0.68 ~ 0.71, and abrasive body is rendered as the motion of coming down in torrents, and has good rubbing effect, is applicable to regrind mill, can ensure the granularity of finished powder;
(2) due to warehouse for drying and coarse grinding cabin enlarged-diameter, length diminishes, and its partition panel and discharging grate plate effective filtration area also become greatly, and the head quill shaft internal diameter being connected with it also becomes large, this unloads in being all conducive to dries passing through of the interior grinding charge material of mill and thermal current, is beneficial to the material balance at two ends.Therefore, in change barrel dliameter, unload to dry to grind and can effectively improve mill efficiency and drying efficiency, also improved the space availability ratio of factory building simultaneously.
Brief description of the drawings
Fig. 1 unloads in existing to dry mill structure schematic diagram;
Fig. 2 unloads in provided by the invention to dry mill structure schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing 2, the specific embodiment of the present invention is described further.It should be noted that at this, be mainly used in helping to understand the present invention for the explanation of these embodiments, but do not form limitation of the invention.In addition,, in the various embodiments of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
As shown in Figure 2, in change barrel dliameter provided by the invention, unload mill structure and comprise the head quill shaft 21, warehouse for drying I, coarse grinding cabin II, discharge bin III, fine grinding storehouse IV and the afterbody quill shaft 29 that connect successively.Wherein, lifting blade 22 is housed in warehouse for drying I, corase grind liner plate 24 is housed in coarse grinding cabin II, between warehouse for drying I and coarse grinding cabin II, adopt partition panel 23 to separate, the two ends of discharge bin III are provided with discharging thin bamboo strip plate 25, in the IV of fine grinding storehouse, corrugated liner 27 are housed.Warehouse for drying I, coarse grinding cabin II, discharge bin III and fine grinding storehouse IV four part cylindrical shells connect firmly into the grinding mill barrel 26 of a hollow, under transmission gear ring 28 drives, have rotated together grinding operation.
In change barrel dliameter provided by the invention, unload mill and be characterised in that, warehouse for drying I is consistent with the cylinder internal diameter of coarse grinding cabin II, but is all greater than the cylinder internal diameter of fine grinding storehouse IV.It is a grinding mill barrel 26 that the fine grinding storehouse IV of large diameter warehouse for drying I and coarse grinding cabin II and small diameter connects firmly by the discharge bin III of a frustum of a cone cylindrical shell, rotation under transmission gear ring 28 drives.Under same rotating speed, can make abrasive body in coarse grinding cabin II be cast and decline movement state, and in the IV of fine grinding storehouse, abrasive body is the motion state of coming down in torrents, and is applicable to respectively material coarse crushing and regrind mill, and has reduced material and gas-flow resistance in warehouse for drying I, coarse grinding cabin II.In addition, the internal diameter of head quill shaft 21 is greater than the internal diameter of afterbody quill shaft 29, to be adapted to by different inventories.
Grinding material can be lime stone, raw coal, can be also the Industrial Solid Wastes such as slag, slag, carbide slag.It is 0.73 ~ 0.78 that grinding mill barrel 26 rotating speeds should meet coarse grinding cabin II rotating ratio simultaneously, and fine grinding storehouse IV rotating ratio is 0.68 ~ 0.71, thereby under an angle rotating speed, occurs two kinds of required abrasive body motion states, thereby obtains best impact comminution and grinding effect.
Example 1:
In unload head quill shaft 21, warehouse for drying I and the coarse grinding cabin II of mill barrel dliameter become large, making the ratio of coarse grinding cabin II and fine grinding storehouse IV cylinder internal diameter is between 1.15 to 1.25, and the internal diameter of two parts cylindrical shell all should be among the preferred series of existing ball mill standard (seeing annex).Known according to known grinding in ball grinder body kinematics analysis method: when the effective internal diameter of grinding mill barrel 26 is that D(D is that cylinder internal diameter deducts liner plate thickness) time, its critical speed
and theoretical suitable rotating speed is
ratio between two is called theoretical rotational speed ratio: K
l=n/n
0=0.76.Show but add up, the actual speed ratio of most of cement plants grinding machine is less than theoretical rotational speed ratio, i.e. K
s=(0.68 ~ 0.72) < K
l, impact and ensure grinding effect and finish fineness (actual speed refers to the ratio of actual speed and critical speed than Ks) to weaken.In the present invention's change barrel dliameter, unload mill, coarse grinding cabin II is 1.15 ~ 1.25 with the ratio of fine grinding storehouse IV cylinder internal diameter, can make grinding mill barrel 26 in same rotation process, and coarse grinding cabin II actual speed compares K
s1be 0.73 ~ 0.78 o'clock, the actual speed of fine grinding storehouse IV compares K
s2be 0.68 ~ 0.71, realize abrasive body in coarse grinding cabin II and be and leave shape and abrasive body in the IV of fine grinding storehouse is the shape that comes down in torrents, thereby obtain better impact comminution and grinding effect respectively.Meanwhile, the cross section of coarse grinding cabin II expands, and length can correspondingly be dwindled, and keeps its useful space
with the fine grinding storehouse IV useful space
ratio be
the length of warehouse for drying I can become according to raw material water content, and general control is in below 1/2 of coarse grinding cabin II length.
Because warehouse for drying I and coarse grinding cabin II barrel diameter expand, the area of the internal diameter of the head quill shaft 21 being connected and partition panel 23 and coarse grinding cabin II discharging grate plate 25 is increase thereupon also, is conducive to material and thermal current passes through.
Discharge bin III between coarse grinding cabin II and fine grinding storehouse IV is cross section taper shape, to connect respectively the fine grinding storehouse IV of coarse grinding cabin II and little barrel dliameter of large barrel dliameter.It is fan-shaped that the dumping pit of discharge bin III is made butt, is distributed on discharge bin III taper surface.
Owing to having strong impact grinding and draught capacity, grinding machine of the present invention also can be used for the grinding of the solid waste such as slag, carbide slag.The transmission power of unloading mill in change barrel dliameter can be by known ball mill power computational methods, calculate respectively the transmission power of coarse grinding cabin II, fine grinding storehouse IV, warehouse for drying I, after calculating, are added and form.
Table 1 has provided Φ 3.8/ Φ 3.5 and has become the structural parameters and the operational parameter that in barrel dliameter, unload grinding machine, and table 2 has provided coarse grinding cabin II and the fine grinding storehouse IV cylinder internal diameter series of in alternative change barrel dliameter, unloading grinding machine.
The above is preferred embodiment of the present invention, but the present invention should only not be confined to this embodiment and the disclosed content of accompanying drawing.Every do not depart under spirit disclosed in this invention, complete equivalence or amendment, all fall into the scope of protection of the invention.
The important technological parameters of unloading mill in 3.5 × 10 meters of change barrel dliameters of table 1 Φ 3.8/ Φ
Table 2 become in barrel dliameter, unload that grinding machine is thick, fine grinding storehouse effectively in through matching series
Claims (1)
1. in a change barrel dliameter, unload oven dry grinding machine, comprise the head quill shaft, warehouse for drying, coarse grinding cabin, discharge bin, fine grinding storehouse and the afterbody quill shaft that connect successively, it is characterized in that, warehouse for drying is consistent with the cylinder internal diameter of coarse grinding cabin, warehouse for drying and coarse grinding cabin cylinder internal diameter are all greater than the cylinder internal diameter in fine grinding storehouse, coarse grinding cabin is fixedly connected with by the cylinder-shaped discharge bin of frustum of a cone with fine grinding storehouse, and warehouse for drying, coarse grinding cabin, discharge bin and fine grinding storehouse connect and compose grinding mill barrel successively;
The internal diameter of head quill shaft is greater than the internal diameter of afterbody quill shaft; Coarse grinding cabin is 1.15～1.25 with the ratio of fine grinding storehouse cylinder internal diameter; Under same rotating speed, make abrasive body in coarse grinding cabin be cast and decline movement state, and in fine grinding storehouse, abrasive body is the motion state of coming down in torrents, and is applicable to respectively material coarse crushing and regrind mill, and has reduced material and gas-flow resistance in warehouse for drying, coarse grinding cabin;
The actual speed of coarse grinding cabin compares K
s1be 0.73～0.78; The actual speed in fine grinding storehouse compares K
s2be 0.68～0.71, make to occur two kinds of required abrasive body motion states under an angle rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210395485.XA CN102941142B (en) | 2012-10-17 | 2012-10-17 | Central-discharged drying-grinding mill with variable cylinder diameter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210395485.XA CN102941142B (en) | 2012-10-17 | 2012-10-17 | Central-discharged drying-grinding mill with variable cylinder diameter |
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| CN102941142A CN102941142A (en) | 2013-02-27 |
| CN102941142B true CN102941142B (en) | 2014-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105107579B (en) * | 2015-09-07 | 2018-05-25 | 攀钢集团攀枝花钢钒有限公司 | Ball mill |
| CN112028485B (en) * | 2020-09-11 | 2022-02-11 | 重庆鸽牌电瓷有限公司 | Purple glaze for insulator processing and processing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1157780A (en) * | 1968-03-06 | 1969-07-09 | Polysius Gmbh | Method for Grinding and Drying Wet Material |
| GB1227839A (en) * | 1968-11-20 | 1971-04-07 | ||
| GB1342559A (en) * | 1971-05-06 | 1974-01-03 | Polysius Ag | Method of and apparatgus for crushing and drying |
| FR2269376A1 (en) * | 1974-04-30 | 1975-11-28 | Fives Cail Babcock | Double chamber horiz. rotary grinder - has different dia. adjacent chambers on bearings located for min. bending moments |
| RU2045341C1 (en) * | 1992-09-07 | 1995-10-10 | Акционерное общество открытого типа "Волжский научно-исследовательский институт цементного машиностроения" | Method for two-stage grinding of friable material |
| CN201399363Y (en) * | 2009-05-06 | 2010-02-10 | 天津振兴水泥有限公司 | End cover plate of dry central discharge raw mill |
| CN102284323A (en) * | 2010-06-16 | 2011-12-21 | 坡利西斯股份公司 | Method for milling abrasives in aid of a tube mill |
| CN202356153U (en) * | 2011-12-07 | 2012-08-01 | 孙德成 | Middle discharge raw mill system with screening device |
-
2012
- 2012-10-17 CN CN201210395485.XA patent/CN102941142B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1157780A (en) * | 1968-03-06 | 1969-07-09 | Polysius Gmbh | Method for Grinding and Drying Wet Material |
| GB1227839A (en) * | 1968-11-20 | 1971-04-07 | ||
| GB1342559A (en) * | 1971-05-06 | 1974-01-03 | Polysius Ag | Method of and apparatgus for crushing and drying |
| FR2269376A1 (en) * | 1974-04-30 | 1975-11-28 | Fives Cail Babcock | Double chamber horiz. rotary grinder - has different dia. adjacent chambers on bearings located for min. bending moments |
| RU2045341C1 (en) * | 1992-09-07 | 1995-10-10 | Акционерное общество открытого типа "Волжский научно-исследовательский институт цементного машиностроения" | Method for two-stage grinding of friable material |
| CN201399363Y (en) * | 2009-05-06 | 2010-02-10 | 天津振兴水泥有限公司 | End cover plate of dry central discharge raw mill |
| CN102284323A (en) * | 2010-06-16 | 2011-12-21 | 坡利西斯股份公司 | Method for milling abrasives in aid of a tube mill |
| CN202356153U (en) * | 2011-12-07 | 2012-08-01 | 孙德成 | Middle discharge raw mill system with screening device |
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| CN102941142A (en) | 2013-02-27 |
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Address after: 430200 Wuhan four East Lake Road Development Zone, Hubei 40 Gezhouba Dam 40 Sun City 23 building 103 room. Patentee after: WUHAN LIZHIDA TECHNOLOGY CO.,LTD. Address before: 430074 Ding Yuan Lou, international business center, Optics Valley Avenue, Wuhan, Hubei, A423 Patentee before: WUHAN LIZHIDA SCIENCE & TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A drying mill with variable cylinder diameter and medium discharge Effective date of registration: 20220317 Granted publication date: 20141210 Pledgee: Bank of China Limited Wuhan provincial branch Pledgor: WUHAN LIZHIDA TECHNOLOGY CO.,LTD. Registration number: Y2022420000066 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20141210 Pledgee: Bank of China Limited Wuhan provincial branch Pledgor: WUHAN LIZHIDA TECHNOLOGY CO.,LTD. Registration number: Y2022420000066 |