CN103342482B - External-circulation cement finish grinding system for vertical mill - Google Patents
External-circulation cement finish grinding system for vertical mill Download PDFInfo
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- CN103342482B CN103342482B CN201310325375.0A CN201310325375A CN103342482B CN 103342482 B CN103342482 B CN 103342482B CN 201310325375 A CN201310325375 A CN 201310325375A CN 103342482 B CN103342482 B CN 103342482B
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- vertical mill
- separating machine
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- grinding system
- bucket elevator
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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 an external-circulation cement finish grinding system for a vertical mill. The external-circulation cement finish grinding system comprises a belt conveyor, a bucket elevator, a steady current bin, a vertical mill, a dust collector, a fan and a chute, wherein the belt conveyor is used for conveying materials inside, and the chute is used for conveying fine powder finished products outside. The external-circulation cement finish grinding system is characterized in that the bucket elevator, a coarse powder concentrator, the steady current bin and the vertical mill are sequentially connected to form a circulating system; the bucket elevator, the coarse powder concentrator, a refined powder concentrator, the steady current bin and the vertical mill are sequentially connected to form a circulating system; the bucket elevator, the coarse powder concentrator, the refined powder concentrator, the dust collector and the fan are sequentially connected; a powder concentration device is positioned outside the vertical mill and is formed by serially connecting the coarse powder concentrator and the refined powder concentrator; the coarse powder concentrator comprises three paths of air inlet pipelines which are connected in parallel, one path is connected with a heat source, one path is connected with cold air, and one path is connected with a dust collecting air inlet of the vertical mill.
Description
Technical field
The present invention relates to a kind of cement grinding system, relate in particular to a kind of outer circulation cement vertical mill final grinding system.
Background technology
In cement grinding field, tuber grinder due to capacity usage ratio and mill efficiency low, aspect energy-conservation grinding, progressively by efficient milling equipment, replaced.Vertical Mill is a kind of bed of material milling equipment, and mill efficiency is higher.Vertical Mill final grinding system is used in a large number aspect cement slurry grinding and pulverized coal preparation, aspect cement grinding, also there are many cases, cement prepared by the Vertical Mill final grinding system that fears are entertained that in the past needs that water-based is high, pattern sphericity is low and the unfavorable performance such as size distribution is too concentrated, progressively by cement work person, with practice, overthrown, the cement grinding with Vertical Mill final grinding system does not almost have significant difference at the cement that needs the aspects such as water-based, intensity and concrete adaptability and ball mill to grind.
The energy conservation characteristic of Vertical Mill final grinding system by people cognition, compared with the pre-grinding of roll squeezer, combination grinding and half final grinding system and other Ball Mill Systems with pre-grinding, the electricity saving performance of the whole grinding of Vertical Mill is more superior.
The Vertical Mill that Vertical Mill final grinding system makes mostly at present is the Vertical Mill that carries powder separating machine, Vertical Mill integrates grinding, selects powder, in Vertical Mill, control certain wind speed, fine powder after grinding is taken away upward by wind in Vertical Mill, through built-in powder separating machine, select finished product, the coarse particles that the coarse particles that wind band is not walked and powder separating machine are selected returns to mill and continues grinding.It is larger because the nozzle ring wind speed of Vertical Mill own is higher, Vertical Mill is processed air quantity, the Vertical Mill resistance and the air quantity that cause carrying powder separating machine are all larger, make the power consumption of internal-circulation type Vertical Mill final grinding system higher, compare with roll squeezer, the pre-grinding of Vertical Mill or half final grinding system, power savings is not too obvious.
Powder separating machine is placed in outside Vertical Mill, and the powder after vertical mill grinding promotes feeding powder separating machine by gravity, compared with high-drag, all relies on the built-in vertical mill system of powder separating machine of wind-power lifting fine powder more to economize on electricity.Directly powder separating machine shifted out to Vertical Mill, use other powder separating machines instead and carry out when mill is outer to be selected powder and collect finished product, Vertical Mill has also lost hot-wind drying function, and when cement blended material used or retardant moisture content are when larger, this Vertical Mill is just difficult to adapt to.
How to utilize gravity to promote Substitute For Partial airlift, also reduce and select powder blast and air quantity to realize the energy saving of Vertical Mill outer circulation final grinding system, possess again certain drying function? the present invention is exactly the whole grinding energy saving of integrated Vertical Mill outer circulation and drying function in the whole grinding of a kind of cement vertical mill system of one the problems referred to above certainly.
Summary of the invention
For above problem, the invention provides a kind of energy-conservation, outer circulation cement vertical mill final grinding system with certain drying function.
In order overcoming the above problems, to the invention provides a kind of outer circulation cement vertical mill final grinding system, to it is characterized in that: comprise conveyor, bucket elevator, current stabilization storehouse, Vertical Mill, dust-precipitator, blower fan, skewed slot; Conveyor is used for transporting material, and skewed slot is used for transporting powder material; Bucket elevator, meal powder separating machine, current stabilization storehouse, Vertical Mill are connected successively, form a recycle system; Bucket elevator, meal powder separating machine, meticulous powder separating machine, current stabilization storehouse, Vertical Mill are connected successively, form a recycle system; Bucket elevator, meal powder separating machine, meticulous powder separating machine, dust-precipitator, blower fan are connected successively; Vertical Mill is provided with opening for feed, discharge port, the air port of gathering dust; Powder selection device is placed in outside Vertical Mill, by meal powder separating machine and meticulous powder separating machine, is in series, and meal powder separating machine intake stack You San road composes in parallel, and a road connects thermal source, and a road connects air cold wind, and a road connects the air port of gathering dust of Vertical Mill.The external reduction of powder selection device of the present invention selects powder resistance and part air quantity, the blower fan that powder selection device arranges is all reduced to some extent on pressure head and air quantity, thereby the power consumption of reduction system blower fan used makes system more energy-conservation below.Meal powder separating machine is connected with thermal source, possesses drying materials function, makes this grinding system adaptation and range of application wider.
As another kind of improvement of the present invention, described Vertical Mill itself is without powder separating machine, and opening for feed is arranged on Vertical Mill top, discharge port is arranged on Vertical Mill side-lower, and the air port of gathering dust is located at Vertical Mill top, and hot-wind inlet is located at below in Vertical Mill.Described Vertical Mill is also provided with hot-wind inlet, and described hot-wind inlet is connected with thermal source.The hot gas that thermal source of the present invention provides below in Vertical Mill enters Vertical Mill, the material falling with Vertical Mill top carries out heat exchange, realize hot gas to the auxiliary oven dry of material and keep negative pressure operation (reducing Vertical Mill dust pollution), thermal source used can be provided or from industrial hot waste gas by hotblast stove.
As another kind of improvement of the present invention, on the intake stack of described meal powder separating machine San road, be respectively equipped with heat source valve, air cold blast valve, tuyere valve gathers dust.Can effectively control and regulate air quantity.
As another kind of improvement of the present invention, described conveyor directly feeds meal powder separating machine by the material from proportioning station through bucket elevator.The present invention can realize material dries in meal powder separating machine and Vertical Mill simultaneously, in meal powder separating machine, mainly dries, and assists oven dry in Vertical Mill.
As another kind of improvement of the present invention, described conveyor is directly closed the material from proportioning station by Vertical Mill opening for feed feeding Vertical Mill or heat source valve, and conveyor directly feeds Vertical Mill by the material from proportioning station by Vertical Mill opening for feed.This scheme is applicable to the lower cement raw material of moisture content, and fresh material elder generation grinding in Vertical Mill becomes fine powder body, can improve the fine powder amount that powder selection device is selected.
As another kind of improvement of the present invention, the raw material of powdery directly feeds thick powder separating machine, directly by meticulous powder separating machine, elects parts of fine raw material as finished product.This scheme can alleviate grinding amount and the grinding burden of Vertical Mill, thereby improves system throughput and reduce system grinding pow consumption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of system of the present invention;
Fig. 2 is the system schematic that the present invention improves I;
Fig. 3 is the system schematic that the present invention improves II;
Fig. 4 is the system schematic that the present invention improves III.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figures 1 to 4, the invention provides a kind of outer circulation cement vertical mill final grinding system, comprise conveyor 1, bucket elevator 2, current stabilization storehouse 4, Vertical Mill 5, dust-precipitator 7, blower fan 8, skewed slot 9; Conveyor 1 is for transporting material, and skewed slot 9 is for transporting powder material; Bucket elevator 2, meal powder separating machine 3, current stabilization storehouse 4, Vertical Mill 5 are connected successively, form a recycle system; Bucket elevator 2, meal powder separating machine 3, meticulous powder separating machine 6, current stabilization storehouse 4, Vertical Mill 5 are connected successively, form a recycle system; Bucket elevator 2, meal powder separating machine 3, meticulous powder separating machine 6, dust-precipitator 7, blower fan 8 are connected successively; Vertical Mill 5 is provided with opening for feed 5-3, discharge port 5-4, air port 5-1 gathers dust; Powder selection device is placed in outside Vertical Mill 5, by meal powder separating machine 3 and meticulous powder separating machine 6, is in series, and meal powder separating machine 3 intake stack You San roads compose in parallel, and a road connects thermal source 10, one tunnels and connects the air port 5-1 that gathers dust that air cold wind 12, one tunnels connect Vertical Mill 5.
Powder separating machine of the present invention is different from the built-in powder separating machine of Vertical Mill, the external reduction of powder selection device selects powder resistance and part air quantity, the blower fan that powder selection device arranges is all reduced to some extent on pressure head and air quantity, thereby the power consumption of reduction system blower fan used make system more energy-conservation below.Powder selection device is placed in outside Vertical Mill 5, goes out grind materials and promotes Substitute For Partial airlift by gravity, can realize certain energy-saving effect.Meal powder separating machine 3 is connected with thermal source 10, possesses drying materials function, makes this grinding system adaptation and range of application wider.
On described meal powder separating machine 3 San road intake stack, be respectively equipped with heat source valve 13, air cold blast valve 14, the tuyere valve 15 that gathers dust, can control and regulate air quantity.
As shown in Figure 1, described conveyor 1 directly feeds meal powder separating machines 3 by the material from proportioning station through bucket elevator 2, to mill feed material, can realize pre-treatment, increases adaptation and the range of application of system.Meal powder separating machine 3 intake stack pass into the hot blast that thermal source 10 provides, and after 3 li of meal powder separating machines complete preliminary oven dry and select powder, through current stabilization storehouse 4 feeding Vertical Mills 5, are carrying out grinding.This scheme is applicable to the higher cement raw material of moisture content.This scheme can realize material in meal powder separating machine 3 and 5 li of oven dry simultaneously of Vertical Mill, 3 li of meal powder separating machines, mainly dries, and 5 li of Vertical Mills, assists oven dry.
As shown in Figure 2, described Vertical Mill 5 is own, and without powder separating machine, opening for feed 5-3 is arranged on Vertical Mill 5 tops, discharge port 5-4 is arranged on Vertical Mill 5 side-lowers, and the air port 5-1 that gathers dust is located at Vertical Mill 5 tops.Described Vertical Mill 5 is also provided with hot-wind inlet 5-2, and described hot-wind inlet 5-2 is connected with thermal source 11.Vertical Mill of the present invention is the Vertical Mill of top charging, side-lower discharging, hot-wind inlet is located at below in Vertical Mill, the air port of gathering dust is located at Vertical Mill top, hot-wind inlet is connected with thermal source, the hot gas that thermal source provides below in Vertical Mill enters Vertical Mill, the material falling with Vertical Mill top carries out heat exchange, realizes hot gas to the auxiliary oven dry of material and keeps negative pressure operation (reducing Vertical Mill dust pollution), and thermal source used can be provided or from industrial hot waste gas by hotblast stove.
As shown in Figure 3, as another kind of improvement of the present invention, described conveyor 1 directly feeds Vertical Mill 5 by the material from proportioning station by Vertical Mill opening for feed 5-3, and material feeds powder selection device again and selects powder classification and again dry after 5 li of Vertical Mills complete preliminary grinding.When material moisture content hour, heat source valve 13 can be closed.This scheme is applicable to the lower cement raw material of moisture content, and fresh material first becomes fine powder body at the inner grinding of Vertical Mill (5), can improve the fine powder amount that powder selection device is selected.
As described in Figure 4, as another kind of improvement of the present invention, the raw material 16 (as flyash) of powdery can directly feed meal powder separating machine 3, by meticulous powder separating machine 6, select parts of fine finished granule, to alleviate grinding amount and the grinding burden of Vertical Mill 5, thereby improve system throughput and reduce system grinding pow consumption; When certain blended material of cement has been processed to finished product fine powder body or superfine powder (slag, steel-making slag powder etc.), can directly mix in dust-precipitator 7 skewed slot 9 below.
The foregoing is only the preferred embodiments of the present invention, be not restricted to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (8)
1. an outer circulation cement vertical mill final grinding system, comprises conveyor (1), bucket elevator (2), current stabilization storehouse (4), Vertical Mill (5), dust-precipitator (7), blower fan (8), skewed slot (9); Conveyor (1) is for being transported into material, and skewed slot (9) is for transporting fine powder finished product materials; It is characterized in that: bucket elevator (2), meal powder separating machine (3), current stabilization storehouse (4), Vertical Mill (5) are connected successively, form a recycle system; Bucket elevator (2), meal powder separating machine (3), meticulous powder separating machine (6), current stabilization storehouse (4), Vertical Mill (5) are connected successively, form a recycle system; Bucket elevator (2), meal powder separating machine (3), meticulous powder separating machine (6), dust-precipitator (7), blower fan (8) are connected successively; Powder selection device is placed in outside Vertical Mill (5), by meal powder separating machine (3) and meticulous powder separating machine (6), is in series; Meal powder separating machine (3) intake stack You San road composes in parallel, and a road connects the first thermal source (10), and a road connects air cold wind (12), and a road connects the air port of gathering dust (5-1) of Vertical Mill (5).
2. a kind of outer circulation cement vertical mill final grinding system according to claim 1, it is characterized in that: described Vertical Mill (5) itself is without powder separating machine, opening for feed (5-3) is arranged on Vertical Mill (5) top, discharge port (5-4) is arranged on Vertical Mill (5) side-lower, and the air port of gathering dust (5-1) is located at Vertical Mill (5) top.
3. a kind of outer circulation cement vertical mill final grinding system according to claim 1 and 2, it is characterized in that: described Vertical Mill (5) is also provided with hot-wind inlet (5-2), be arranged in Vertical Mill (5) below, described hot-wind inlet (5-2) is connected with Secondary Heat Source (11).
4. a kind of outer circulation cement vertical mill final grinding system according to claim 1, is characterized in that: described in
On the intake stack of meal powder separating machine (3) San road, be respectively equipped with heat source valve (13), air cold blast valve (14), the tuyere valve that gathers dust (15).
5. a kind of outer circulation cement vertical mill final grinding system according to claim 1, is characterized in that: described conveyor (1) directly feeds meal powder separating machine (3) by the material from proportioning station through bucket elevator (2).
6. a kind of outer circulation cement vertical mill final grinding system according to claim 1, is characterized in that: described conveyor (1) directly feeds Vertical Mill (5) by the material from proportioning station by Vertical Mill opening for feed (5-3).
7. a kind of outer circulation cement vertical mill final grinding system according to claim 1, is characterized in that: the raw material of powdery directly feeds meal powder separating machine (3).
8. according to a kind of outer circulation cement vertical mill final grinding system described in claim 1 or 3, it is characterized in that: described the first thermal source (10) and Secondary Heat Source (11) are from hotblast stove or industrial hot waste gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310325375.0A CN103342482B (en) | 2013-07-30 | 2013-07-30 | External-circulation cement finish grinding system for vertical mill |
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| CN201310325375.0A CN103342482B (en) | 2013-07-30 | 2013-07-30 | External-circulation cement finish grinding system for vertical mill |
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| CN103342482A CN103342482A (en) | 2013-10-09 |
| CN103342482B true CN103342482B (en) | 2014-10-15 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261707B (en) * | 2014-09-19 | 2015-11-11 | 南京凯盛国际工程有限公司 | A kind of cement outer circulation Vertical Mill preparation system of grain size adjustable distribution |
| CN104211312B (en) * | 2014-09-19 | 2016-05-25 | 南京凯盛国际工程有限公司 | A kind of cement outer circulation Vertical Mill half final grinding system |
| CN104624345A (en) * | 2015-02-15 | 2015-05-20 | 胡沿东 | Ore grinding system |
| CN104772212A (en) * | 2015-02-15 | 2015-07-15 | 胡沿东 | Separation system |
| CN104907150A (en) * | 2015-05-05 | 2015-09-16 | 铜陵海源超微粉体有限公司 | High-moisture vertical mill drying in-series grinding process |
| CN106396442B (en) * | 2015-07-27 | 2018-10-23 | 南京凯盛国际工程有限公司 | Cement grinding and metering process |
| CN105080690B (en) * | 2015-08-12 | 2018-06-08 | 南京圣火环境科技有限公司 | A kind of vertical roller grinder bypass classification drying raw material preparation system and technique |
| CN108927275A (en) * | 2018-08-13 | 2018-12-04 | 南京凯盛国际工程有限公司 | Combined type cement grinding system and method suitable for high moisture content material |
| CN109046561A (en) * | 2018-09-27 | 2018-12-21 | 天津水泥工业设计研究院有限公司 | A kind of steel slag final grinding system of roll squeezer |
| CN110860343A (en) * | 2019-11-15 | 2020-03-06 | 南京钜力智能制造技术研究院有限公司 | External circulation system and process for raw material vertical mill |
| CN113457816B (en) * | 2021-07-01 | 2022-08-19 | 厦门艾思欧标准砂有限公司 | System and process for preparing spheroidized powder by adopting vertical grinding machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179285A (en) * | 2011-03-02 | 2011-09-14 | 江苏羚羊水泥工程技术有限公司 | Single-compartment ball mill type cement vertical mill grinding device |
| CN102389852B (en) * | 2011-11-22 | 2013-10-02 | 江苏羚羊水泥工程技术有限公司 | Multitime-separation high-efficient cement vertical mill |
| CN203360283U (en) * | 2013-07-30 | 2013-12-25 | 南京凯盛国际工程有限公司 | Outer circulation final grinding system of cement vertical mill |
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Address after: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee after: Zhongcai International Intelligent Technology Co.,Ltd. Address before: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee before: NANJING KISEN INTERNATIONAL ENGINEERING Co.,Ltd. |
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