CN2546089Y - Coal mill with screen separating container device and grading lining board - Google Patents
Coal mill with screen separating container device and grading lining board Download PDFInfo
- Publication number
- CN2546089Y CN2546089Y CN 02235064 CN02235064U CN2546089Y CN 2546089 Y CN2546089 Y CN 2546089Y CN 02235064 CN02235064 CN 02235064 CN 02235064 U CN02235064 U CN 02235064U CN 2546089 Y CN2546089 Y CN 2546089Y
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- mill
- grinding
- coal
- storehouse
- abrasive body
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Abstract
Disclosed is a coal mill with a screening and partitioning device and a classifying liner, which comprises a feed end, a discharge end, a mill vessel, a lining board in mill and grinding bodies, a double-layer screening diaphragm is utilized for partitioning the space in the mill into a coarse grinding bin and a fine grinding bin, the waveform classifying liner is used in the mill, the coarse grinding bin adopts the big grinding body, and the fine grinding bin adopts the small grinding body, the classified grinding in the coal mill can be realized by screening the material through a screening device in the double-layer screening diaphragm, thus improving the grinding efficiency and reducing the energy consumption, and the fine grinding to anthracite and faulty coal with bad grindability can be implemented, therefore, the utility model has advantages of simple structure of the whole machine, convenient maintenance and long service life of parts.
Description
Technical field
The utility model relates to a kind of milling equipment, can be widely used in metallurgy, electric power, building materials industry, especially is suitable as the coal dust making apparatus in cement plant.
Background technology
At present, in relevant enterprises such as the cement plant of China, aluminium manufacturer, power plant, the preparation of coal dust mainly utilizes wind to sweep the formula coal and grinds and finish.It is a kind of weak point and thick ball mill that wind is swept formula coal mill, has only a grinding storehouse (have be with an oven dry storehouse), and interior dress waveform liner plate, the steel ball that adopts 30～70 millimeters feed hot blast simultaneously coal dust is dried in mill as abrasive body.Generally fire coal is ground to 0.08 millimeter square hole screen tails over 10～20% fineness.This equipment has characteristics such as simple in structure, easy to operate, that reliability is high, adaptability is strong.
As everyone knows, the meal mill should adopt different grinding body gradations with regrind mill, just higher mill efficiency can be arranged.Common wind is swept formula coal mill owing to have only a grinding storehouse, thus the meal mill can not be separated with regrind mill, thereby limited the raising of mill efficiency.Because all the cross section structure size of mill interior lining panel is all identical, cause the often reverse classification of appearance of steel ball in the mill, be that the big feed end average ball diameter of raw meal particle size is less, the discharge end average ball diameter that granularity is little is bigger on the contrary, this had not both met the requirement of grinding rule, the bead that accumulates in feed end is gone in the blast pipe, increased the air intake resistance or result in blockage.
When sweeping coal with common wind and grind the anthracite of fineness requirement height (0.08 millimeter square hole screen tails over less than 5%) and colm, for above-mentioned reasons, its output descends significantly, and power consumption rises, and fineness is difficult for stable.
The utility model content
The purpose of this utility model is exactly to provide a kind of wind of new construction to sweep formula coal mill, to solve or to improve above-mentioned wind and sweep the deficiency that the formula coal grinds.By realizing dividing storehouse grinding and classification grinding, make the reasonable classification of abrasive body in the grinding machine, the motion of abrasive body is more reasonable, thereby grinding machine mill efficiency be improved, realize improving mill output, reduce grinding pow consumption, stablize the purpose of discharging fineness, and energy less expensive ground solves the fine grinding problem of anthracite and colm.
The utility model designs according to the material grinding theory.The material grinding theory shows, the material of different-grain diameter adopts abrasive body grinding effect correspondingly best, and thick material adopts big abrasive body, and thin material adopts little abrasive body.According to this principle, the utility model changes single storehouse grinding of common coal mill into branch storehouse grinding, the different abrasive body of adapted in different grinding storehouses.
Common coal mill mainly is made up of feed arrangement, base bearing, grinding mill barrel, mill interior lining panel, drawing mechanism, transmission device etc.Raw coal grinds via abrasive body by in the feed arrangement feeding grinding mill barrel, is drawn off outside the mill by drawing mechanism again.And characteristics of the present utility model are in the grinding mill barrel indoor design and install and can adapt to that wind is swept formula coal mill characteristics, double deck screen with screening and grading divides partition panel, grinding mill barrel is separated into two storehouses, and divides the firm and hard existing thickness of compartment to separate material in grinding by this double deck screen.
Raw coal is sent into the corase grind storehouse of grinding mill barrel through feed arrangement, simultaneously feeding hot blast in mill.The raw coal of feeding at first carries out fragmentation and corase grind in this storehouse by big ball, and the hot blast that feeds is dried the moisture content in the raw coal.Enter the screening partition panel through the coal dust of pulverizing, divided the screening plant of compartment intralamellar part that material is carried out thickness by double deck screen and separate, coarse fodder returns the corase grind storehouse and continues grinding, and fines then in time by screening plant and enter the fine grinding storehouse, carries out regrind mill by little abrasive body.When the fines that does not contain coarse grain through screening was carried out grinding, because the specific area of little abrasive body is bigger, so the contact area of Unit Weight abrasive body and material increased greatly, thereby improved mill efficiency, and the while also can produce more fine powders.
For further strengthening grading effect, the utility model has designed a kind of novel waveform liner plate, and the principal character of this liner plate is, at the cross section of grinding machine along circumferential direction, the liner plate shape is in wave shape, and at the axis direction along grinding machine, the waveform of liner plate is diminished to discharge end gradually by feed end.The characteristics of this liner plate be make abrasive body in each storehouse along drum shaft to realizing forward classification, the material of promptly big abrasive body grinding large-size, the thinner material of little abrasive body grinding.Average ball diameter is reduced becomes possibility, thereby improves the fine grinding ability.
Use the utility model can have following obvious advantage: at first, the double deck screen of sweeping the design of formula coal mill at wind divides partition panel, the needs that can not only adapt to mill inner ventilation, and this double-deck classification partition panel, the coal mill corase grind storehouse and fine grinding storehouse have been divided into, in the corase grind storehouse, use big abrasive body, in the fine grinding storehouse, use little abrasive body, improved mill efficiency.Secondly,, powder grinding medium size and material particles size are adapted, further improved mill efficiency by of effective classification of waveform classifying lining board to abrasive body.Its three because the raising of mill efficiency not only is suitable for improving output under common fineness, reduce power consumption, be particularly suitable for the anthracite and the colm of grindability difference are carried out fine-grinding.Its four, the classification partition device for barn and the waveform classifying lining board of the utility model design also have characteristics simple in structure, easy to maintenance, long service life.
Description of drawings
Most preferred embodiment of the present utility model can provide in conjunction with the following drawings.
Fig. 1 is a tube structure schematic diagram of the present utility model.
Fig. 2 is that double deck screen of the present utility model divides compartment plate structure schematic diagram.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the backplate schematic diagram that double deck screen divides partition panel.
Fig. 5 is that double deck screen divides a sieve plate schematic diagram in the partition panel.
Fig. 6 is a classifying lining board structural representation of the present utility model.
The specific embodiment
At first consult Fig. 1, the utility model is to grow up on common wind is swept the basis of formula coal mill, is made up of feed arrangement, base bearing, grinding mill barrel 1, mill interior lining panel 2, drawing mechanism, transmission device and abrasive body etc.The utility model is provided with double deck screen in grinding mill barrel inside and divides partition panel 3, and the inner grinding of grinding machine space is divided into corase grind storehouse 4 and fine grinding storehouse 5.
Double deck screen divides the detailed structure of partition panel referring to Fig. 2 and Fig. 3, and the agent structure that grate plate 6 that connects with corase grind storehouse 4 and the backplate 10 that connects with fine grinding storehouse 5 divide partition panel 3 for double deck screen between grate plate 6 and backplate 10, is equipped with compartment grillage 8.Grate plate 6 and backplate 10 are fixed by bolts to the both sides of compartment grillage 8.The comb seam width of grate plate 6 is generally less than 25 millimeters.And use backplate 10 to replace the blind plate of traditional double-layered isolating plate, referring to Fig. 4, backplate 10 structures are similar to grate plate, have the seam of combing on it, have increased draught area, have reduced flowing resistance, thereby can adapt to the requirement that wind is swept the coal mill.It both can be illustrated radiation that comb on the backplate 10 seam is arranged, and also can be polygon, circular concentric or other forms, and the seam width of combing is generally 6～8 millimeters, percent of pass with greater than 10% for well.In the back of grate plate 6, sieve plate 7 of the present utility model is installed, be to be put together, and be fixed on grate plate 6 or the compartment grillage 8 by welding or Bolt Connection by the fan-shaped sieve plate of 10-20 piece.Sieve plate 7 also can be trapezoidal.Referring to Fig. 5, have the sieve seam on the sieve plate 7, and select sieve seam width according to the needs of grinding process with by the performance of grinding material, be generally 2～6 millimeters.Lifting blade 9 and discharging cone 11 are installed between sieve plate 7 and backplate 10, and the big end port in discharging cone 11 is equipped with central plate 12.Use big abrasive body in corase grind storehouse 4,5 use little abrasive body in the fine grinding storehouse, and the optimum size of little abrasive body is, when using the spherical grinding body, its sphere diameter is less than or equal to 25 millimeters, and when using steel section abrasive body, its diameter is less than or equal to 20 millimeters.
During use, raw coal feeds from feed end, at first enter corase grind storehouse 4, behind the big abrasive body grinding in the corase grind storehouse 4, move to gradually near the grate plate 6, thinner coal dust passes the comb hole of grate plate 6 and the sieve aperture of sieve plate 7 in succession, enter double deck screen and divide between the partition panel 3, part directly enters next storehouse from the comb seam of backplate 10, and remaining is then kicked up by lifting blade 9, and be poured on the discharging cone 11, slip into fine grinding storehouse 5.
For further improving grinding effect of the present utility model, abrasive body also can be distributed according to the material movement direction in the inner same storehouse of grinding machine from big to small, the utility model has designed mill internal classification liner plate.Cause the spontaneous combustion blast owing to must not there be the dead angle that is easy to long-pending coal in coal mill lining plate, thereby can not adopt classification liner plates such as the common conical surface, angle spiral.As shown in Figure 6, the classifying lining board cross section of the utility model design is still waveform.On the same cross section of grinding machine, its wave height is identical with the pitch of waves.But along the material movement direction, the wave height and the pitch of waves then reduce successively gradually, and its hoisting power to abrasive body is weakened successively.Because big abrasive body trends towards the big zone of hoisting power, thus can realize abrasive body successively from big to small classification arrange.
Claims (6)
1. a wind is swept formula coal mill, is made up of institutes such as grinding mill barrel (1), feed arrangement, drawing mechanism, mill interior lining panel (2) and abrasive bodies; It is characterized in that utilizing the double-layered isolating plate of being formed by grate plate (6), backplate (10), sieve plate (7), lifting blade (9), compartment grillage (8) and discharging cone (11) (3) that grinding machine inside is divided into corase grind storehouse (4) and fine grinding storehouse (5), wherein grate plate (6) links to each other with fine grinding storehouse (5) with corase grind storehouse (4) respectively with backplate (10), and sieve plate (7) is fixed on grate plate (6) or the compartment grillage (8).
2. coal mill as claimed in claim 1, it is characterized in that using spherical little abrasive body or the little abrasive body of steel section in fine grinding storehouse (5), the optimum size of spherical little abrasive body is that sphere diameter is less than or equal to 25 millimeters, the optimum size of the little abrasive body of steel section is that diameter is less than or equal to 20 millimeters.
3. coal mill as claimed in claim 1 is characterized in that grinding interior lining panel (2) and uses the waveform classifying lining board, and its wave height reduces from the feed end to the discharge end successively.
4. coal mill as claimed in claim 1 is characterized in that sieve plate (7) is to be put together by 10～20 fan-shaped or trapezoidal sieve plates, fixes in the mode of mechanical attachment or welding.
5. coal mill as claimed in claim 4 is characterized in that sieve seam width the best of sieve plate is 2～6 millimeters.
6. coal as claimed in claim 1 mill having the seam of combing on the backplate (10) that it is characterized in that linking to each other with the fine grinding storehouse, backplate is combed and stitched width is the best with 6～8 millimeters, and percent of pass is being the best greater than 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02235064 CN2546089Y (en) | 2002-05-29 | 2002-05-29 | Coal mill with screen separating container device and grading lining board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02235064 CN2546089Y (en) | 2002-05-29 | 2002-05-29 | Coal mill with screen separating container device and grading lining board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546089Y true CN2546089Y (en) | 2003-04-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02235064 Expired - Fee Related CN2546089Y (en) | 2002-05-29 | 2002-05-29 | Coal mill with screen separating container device and grading lining board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546089Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861640A (en) * | 2011-07-06 | 2013-01-09 | 新兴河北工程技术有限公司 | Powder grinding bin of special superfine ball grinding mill for low-volatile coal |
| CN103990518A (en) * | 2014-05-30 | 2014-08-20 | 顾开明 | Compartment grate plate of ball mill |
| CN105935618A (en) * | 2016-05-23 | 2016-09-14 | 江苏秋林特能装备股份有限公司 | Anti-blocking grate plate device of ball mill |
| CN107185655A (en) * | 2017-06-12 | 2017-09-22 | 南京新中磁电技术工程有限公司 | A kind of novel tube mill |
| CN108554532A (en) * | 2018-04-13 | 2018-09-21 | 广东基业长青节能环保实业有限公司 | A kind of ceramic grinding body ball mill |
| CN111346711A (en) * | 2020-04-03 | 2020-06-30 | 江苏鹏飞集团股份有限公司 | Intermediate discharge ball mill |
| CN112473891A (en) * | 2020-12-25 | 2021-03-12 | 海南逸盛石化有限公司 | Separating bin of ball mill |
-
2002
- 2002-05-29 CN CN 02235064 patent/CN2546089Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861640A (en) * | 2011-07-06 | 2013-01-09 | 新兴河北工程技术有限公司 | Powder grinding bin of special superfine ball grinding mill for low-volatile coal |
| CN103990518A (en) * | 2014-05-30 | 2014-08-20 | 顾开明 | Compartment grate plate of ball mill |
| CN105935618A (en) * | 2016-05-23 | 2016-09-14 | 江苏秋林特能装备股份有限公司 | Anti-blocking grate plate device of ball mill |
| CN107185655A (en) * | 2017-06-12 | 2017-09-22 | 南京新中磁电技术工程有限公司 | A kind of novel tube mill |
| CN108554532A (en) * | 2018-04-13 | 2018-09-21 | 广东基业长青节能环保实业有限公司 | A kind of ceramic grinding body ball mill |
| CN108554532B (en) * | 2018-04-13 | 2020-06-23 | 广东基业长青节能环保实业有限公司 | Ceramic grinding body ball mill |
| CN111346711A (en) * | 2020-04-03 | 2020-06-30 | 江苏鹏飞集团股份有限公司 | Intermediate discharge ball mill |
| CN112473891A (en) * | 2020-12-25 | 2021-03-12 | 海南逸盛石化有限公司 | Separating bin of ball mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |