CN104860557A - Vertical mill system for cement - Google Patents
Vertical mill system for cement Download PDFInfo
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- CN104860557A CN104860557A CN201510260275.3A CN201510260275A CN104860557A CN 104860557 A CN104860557 A CN 104860557A CN 201510260275 A CN201510260275 A CN 201510260275A CN 104860557 A CN104860557 A CN 104860557A
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- grinding
- vertical mill
- mill system
- grinding aid
- mill
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a vertical mill system which can thoroughly eliminate the grinding aid stripping phenomenon caused by high ventilation quantities. The vertical mill system comprises a millstone, multiple grinding rollers located above the millstone as well as at least one feeding device located in front of the grinding rollers in the rotation direction, wherein each feeding device comprises a feeding passage and a feeder, an outlet end of the feeding passage is located above the millstone, an inlet end of the feeding passage is located outside the vertical mill system and can be communicated with high-pressure air, and the feeder is used for spraying a grinding aid to a position between the corresponding grinding roller and the millstone through the feeding passage by the aid of the high-pressure air. According to the vertical mill system, feeding pipes are connected with the high-pressure air, the grinding aid is sprayed below the grinding rollers and directly pressed below the rollers to be mixed with materials, so that the grinding aid plays the effect immediately, the stripping phenomenon is thoroughly avoided, and the loss of the grinding aid during feeding before the grinding aid plays the effect is reduced to the minimum.
Description
Technical field
The present invention relates to a kind of for cement vertical mill system, specifically, relate to a kind of cement vertical mill system adopting liquid grinding aid.
Background technology
The liquid grinding aid of cement is a kind of surfactant, has the effect reducing specific surface energy and " wedging " particle crack.Material is in fine grinding process, and particle is refinement progressively, and specific surface area increases, and its surface is charged because of scission of link, and particle mutually adsorbs and occurs reuniting, and crush efficiency is declined.Add a small amount of grinding aid, can particle aggregation be prevented, improve material fluidity, thus improve grinding efficiency, shorten milling time.
At present, the grinding aid that domestic cement production enterprise uses mainly is applied in traditional ball milling powder grinding system, generally can improve output more than 10%.And the enterprise that really successfully liquid grinding aid mass-producing can be applied to vertical mill grinding system does not almost have.This is because horizontal ball mill is different from the ventilation theory of vertical mill, causes traditional feed way to be applied in vertical mill system and be difficult to reach identical effect.
More particularly, Vertical Mill belongs to negative-pressure operation, and in body, negative pressure is higher, and its ventilation (being expressed as air/material ratio) is more obvious than conventional mill is eager to excel a lot.Therefore, if add grinding aid from standard feed mouth (such as at starting material travelling belt and/or directly add cement grinding mill), " stripping " phenomenon will occur, grinding aid, before really playing a role, is just physically consumed in a large number.Meanwhile, the ventilation of vertical mill is higher, obviously can accelerate the early stage evaporation of grinding aid.
In order to improve the grinding aid utilization ratio in vertical mill system, usually adopting and feeding in raw material from grinding door mouth intubate, or feed location is changed on the constant feeder slag weighing cabin from grinding door, jointly entering to grind with slag, gypsum etc.But these methods can only shorten the charging route of grinding aid to a certain extent, and thoroughly cannot solve the peeling that high ventilation causes.
Summary of the invention
For solving the problem, the invention provides a kind of vertical mill system that thoroughly can solve the grinding aid peeling that high ventilation causes.Technical scheme is as follows:
A kind of vertical mill system, comprises a mill and is positioned at the several grinding rollers above described mill, also comprise at least one feeding device in the front being positioned at described grinding roller sense of rotation.This feeding device comprises: exit end above described mill, inlet end outside described vertical mill system and can be connected with high pressure gas loading channel, for being utilized by grinding aid described high pressure gas to be ejected into the feed appliance between described grinding roller and described mill by described loading channel.
Further, the distance of described exit end above described mill between 350 ~ 700mm and described grinding roller is 100 ~ 200mm.
Further, the distance of described exit end above described mill between 650mm and described grinding roller is 150mm.
Further, the front of each described grinding roller is provided with a described feeding device.
Further, described grinding aid is liquid.
According to vertical mill system of the invention process, filling tube is connected with high-pressure air, grinding aid is ejected into below grinding roller, grinding aid be directly forced under roller with mixing of materials, thus play a role immediately, thoroughly avoid peeling, the loss that produces in the charging way of grinding aid before playing a role is reduced to minimum.
Accompanying drawing explanation
Accompanying drawing 1 is the vertical mill system cross sectional representation of embodiment 1;
Accompanying drawing 2 is A-A cross-sectional view of Fig. 1;
Accompanying drawing 3 is structural representations of feeding device.
Shown in figure: 10, vertical mill system; 20, mill; 30,31,32,33, grinding roller; 40, feeding device; 41, loading channel, 42, inlet end, 43, exit end; 44, feed appliance; 45, High-pressure air valve; 50, charging opening.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment 1:
Accompanying drawing 1 is the vertical mill system cross sectional representation of embodiment 1, and accompanying drawing 2 is its A-A cross-sectional view.
As shown in Figure 2, the axis of common vertical mill system 10 is vertical, and its charging opening 50 is positioned at top, and it is inner that the materials such as cement directly send into vertical mill system 10 from charging opening, drops on the mill 20 of below.
Mill 20 has been uniformly distributed in the form of a ring 3 grinding rollers 31,32,33 (30), grinding roller 30 rolls the material be sandwiched between grinding roller 30 and mill 20, makes it be ground into desired size.The vertical mill system of different model, can configure the grinding roller 30 of different quantities, 4 such as common roller Vertical Mill devices.
In accompanying drawing 1, the turning direction of grinding roller 30 is clockwise, in the front of the sense of rotation of each grinding roller 30, is all provided with one for adding the feeding device 40 of grinding aid.The main body of this feeding device 40 is the pipelines inside and outside a through vertical mill system 10, i.e. loading channel 41, and its inlet end 42 is positioned at outside vertical mill system 10, and is connected with high pressure gas by High-pressure air valve 45 (not shown); Exit end 43 is positioned at about 650mm place above mill 20, and the distance between grinding roller is 150mm.The effect of what in fact High-pressure air valve 45 played is feed appliance 44, High-pressure air valve 45 is opened, then liquid grinding aid can be ejected into below grinding roller 30 by gas, grinding aid is directly forced into grinding roller 30 times and mixing of materials, thus play a role immediately, thoroughly avoid peeling, the loss that produces in the charging way of grinding aid before playing a role is reduced to minimum.
Embodiment 2 is the commerical test of the feeding device result of use of checking embodiment 1:
The average operational conditions of grinding aid in commerical test is as follows: vertical mill model: HRM3400; Mill external diameter: 4530mm; Roller number: 4; Installed power: 2800kW; Absorption power: 1600kW; Ventilation: 200000m
3/ h; Roll-in: 13MPa.
According to general purpose portland cement standard GB/T 175-2007, grinding P.O type cement (grog 87% under three kinds of different grinding conditions; Gypsum 6%; Wingdale 7%): blank sample (not adding grinding aid), reference (grinding aid directly instills raw material belt), embodiment 1 (using feed way disclosed by the invention), the data of manufacture of cement parameter and cement quality are as shown in the table:
As can be seen from the above table, in reference, the raising effect of grinding aid to output and cement quality of direct instillation raw material feeding belt is very little, and adopt feed way disclosed by the invention directly to be sent into below roller by grinding aid, then make properties have increase substantially, illustrate that this feed way is effective.
Those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (5)
1. a vertical mill system, comprise a mill (20) and be positioned at the several grinding rollers (30) above described mill (20), it is characterized in that: at least one feeding device (40) also comprising the front being positioned at described grinding roller (30) sense of rotation, this feeding device (40) comprises: exit end (43) is positioned at described mill (20) top, inlet end (42) to be positioned at outside described vertical mill system and the loading channel (41) that can be connected with high pressure gas, the feed appliance (44) between described grinding roller (30) and described mill (20) is ejected into by described loading channel (41) for grinding aid being utilized described high pressure gas.
2. vertical mill system according to claim 1, is characterized in that: described exit end (43) be positioned at described mill (20) top 350 ~ 700mm, and described grinding roller (30) between distance be 100 ~ 200mm.
3. vertical mill system according to claim 2, is characterized in that: described exit end (43) be positioned at described mill (20) top 650mm, and described grinding roller (30) between distance be 150mm.
4. vertical mill system according to claim 1, is characterized in that: the front of each described grinding roller (30) is provided with a described feeding device (40).
5. the vertical mill system according to any one of Claims 1 to 4, is characterized in that: described grinding aid is for liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260275.3A CN104860557B (en) | 2015-05-20 | 2015-05-20 | Vertical mill system for cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260275.3A CN104860557B (en) | 2015-05-20 | 2015-05-20 | Vertical mill system for cement |
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| Publication Number | Publication Date |
|---|---|
| CN104860557A true CN104860557A (en) | 2015-08-26 |
| CN104860557B CN104860557B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510260275.3A Active CN104860557B (en) | 2015-05-20 | 2015-05-20 | Vertical mill system for cement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238154A (en) * | 2016-09-08 | 2016-12-21 | 南京凯盛国际工程有限公司 | Outer circulation Vertical Mill grinding aid bringing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204661561U (en) * | 2015-05-20 | 2015-09-23 | 吴江市明港道桥工程有限公司 | A kind of cement vertical mill system |
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- 2015-05-20 CN CN201510260275.3A patent/CN104860557B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204661561U (en) * | 2015-05-20 | 2015-09-23 | 吴江市明港道桥工程有限公司 | A kind of cement vertical mill system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238154A (en) * | 2016-09-08 | 2016-12-21 | 南京凯盛国际工程有限公司 | Outer circulation Vertical Mill grinding aid bringing device |
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| CN104860557B (en) | 2017-02-22 |
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