CN104211312A - Cement outer-circulating semi-finish grinding system of vertical mill - Google Patents
Cement outer-circulating semi-finish grinding system of vertical mill Download PDFInfo
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- CN104211312A CN104211312A CN201410481631.XA CN201410481631A CN104211312A CN 104211312 A CN104211312 A CN 104211312A CN 201410481631 A CN201410481631 A CN 201410481631A CN 104211312 A CN104211312 A CN 104211312A
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- vertical mill
- separating machine
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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
Abstract
The invention relates to a cement outer-circulating semi-finish grinding system of a vertical mill. The cement outer-circulating semi-finish grinding system comprises a belt conveyor, a magnetic separator, a metal detector, a three-way valve, the vertical mill, a bucket elevator, a powder concentrator, a dust collector, an air blower, a tube grinder and a chute, wherein the vertical mill is an outer-circulating vertical mill, and no powder concentrator is arranged in the outer-circulating vertical mill; the powder concentrator is formed by connecting a coarse powder V-shaped powder concentrator and a fine powder concentrator in series, and fine powder obtained from the coarse powder V-shaped powder concentrator enters the fine powder concentrator for concentration again; the fine powder obtained from the fine powder concentrator is served as a cement product A and collected through the dust collector and the air blower, and separated coarse powder is divided into two ways, wherein one way enters the tube grinder, and one way returns to the vertical mill for circulating grinding; and the powder which enters the tube grinder is ground into a cement product B by the tube grinder. The cement outer-circulating semi-finish grinding system disclosed by the invention achieves relatively high grinding efficiency by sufficiently exerting the high-efficiency crushing and grinding functions of the vertical mill and the high-efficiency grinding function of the tube grinder on the fine powder, thereby reducing the grinding energy consumption.
Description
Technical field
The present invention relates to a kind of cement grinding system, relate in particular to a kind of cement outer circulation Vertical Mill half 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 progressively dwindles in the cement difference that needs the aspects such as water-based, intensity and concrete adaptability and tuber grinder to grind, very approaching through the cement that rationally selects cement prepared by the Vertical Mill of powder and tuber grinder to grind.
The energy conservation characteristic of Vertical Mill final grinding system by people cognition, but the material powder amount of feeding Vertical Mill is excessive, Vertical Mill easily vibrates, the bed of material is also bad stable, specific surface area is powder between 220-320m2/kg, generally can't be as cement products, and Vertical Mill final grinding system need to continue circulation grinding by these thinner powders, stability to Vertical Mill has a significant impact, and also can affect the mill efficiency of material.Internal recycle Vertical Mill final grinding system has many application cases at present, and grinding system power consumption is in the majority at 28-32kWh/t, similar with the Roller Press Combined Grinding System power consumption that application is more, saves power consumption not 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.But exist equally powder between 250-320m2/kg to affect Vertical Mill steady running.Although the mill efficiency of tuber grinder is lower, particularly the fragmentation of tuber grinder and corase grind efficiency are lower, we have accomplished below 28kWh/t by the outer circulation cement vertical mill pregrinding system power consumption of exploitation, illustrate that tuber grinder is still higher for powder mill efficiency more than specific surface area 220m2/kg.Make full use of efficiency crushing, the grinding of Vertical Mill, utilize the efficient fine powder of tuber grinder to grind, form outer circulation Vertical Mill half final grinding system, the above cement powder of specific surface area 320m2/kg that outer circulation Vertical Mill is ground is directly elected cement products as, by the powder feeding tuber grinder between specific surface area 220-320m2/kg, material below specific surface area 220m2/kg is returned to the Vertical Mill grinding that circulates, both efficiency crushing, the grinding of Vertical Mill had been brought into play, brought into play again the high-efficient grinding of tuber grinder, also beneficial to the steady running of Vertical Mill.
Summary of the invention
For above problem, the invention provides cement outer circulation Vertical Mill half final grinding system that a kind of mill efficiency is higher, grinding energy is low.
In order to overcome the above problems, the invention provides a kind of cement outer circulation Vertical Mill half final grinding system, comprise conveyor, metal detector, T-valve, Vertical Mill, bucket elevator, dust-precipitator, blower fan, skewed slot I, tuber grinder, skewed slot II, it is characterized in that: also comprise the powder selection device being placed in outside Vertical Mill, powder selection device is in series by V-type powder separating machine and meticulous powder separating machine, the fine powder of V-type powder separating machine enters meticulous powder separating machine, and meal returns to Vertical Mill; The fine powder of meticulous powder separating machine is elected finished cement A as, and the meal of meticulous powder separating machine divides two-way, and Vertical Mill is returned on a road, and another road enters tuber grinder and ground as finished cement B;
Vertical Mill, bucket elevator, V-type powder separating machine are connected successively, form a recycle system; Vertical Mill, bucket elevator, V-type powder separating machine, meticulous powder separating machine are connected successively, form a recycle system; Vertical Mill, bucket elevator, V-type powder separating machine, meticulous powder separating machine, tuber grinder, skewed slot II are connected successively, form the preparation system of finished cement B; Vertical Mill, bucket elevator, V-type powder separating machine, meticulous powder separating machine, skewed slot I are connected successively, form the preparation system of finished cement A.
Material from proportioning station feeds outer circulation Vertical Mill through conveyor, through Vertical Mill, grinds, and goes out Vertical Mill pulverulent material through bucket elevator feeding V-type powder separating machine, and process V-type powder separating machine is roughly selected, and compared with fine powder body, enters meticulous powder separating machine, and meal returns to outer circulation Vertical Mill; V-type powder separating machine compared with fine powder body, select powder through meticulous powder separating machine, the more fine powder body of selecting is as cement products A, coarse dispersion enters tuber grinder and carries out grinding and obtain finished cement B partially.The meal of meticulous powder separating machine divides two-way, according to the milling capacity of tuber grinder, regulates into tuber grinder and the ratio of returning to Vertical Mill.
As a modification of the present invention, below the meal blanking scraper-trough conveyer of meticulous powder separating machine, T-piece splitting valve is set, two discharge opening pipelines of T-piece splitting valve connect respectively Vertical Mill and tuber grinder.The described isolated meal of meticulous powder separating machine is divided into two-way by T-piece splitting valve by material, regulate T-piece splitting valve, regulate into Vertical Mill and the inventory that enters tuber grinder, and be 0-100% by two-way material adjusting ratio control, the arbitrary proportion of realizing two-way material regulates.
As another kind of improvement of the present invention, the finished cement A that described meticulous powder separating machine is selected carries by skewed slot I, the finished cement B that described tuber grinder grinds carries by skewed slot II, after being mixed into mixed cement, two skewed slot finished cements enter cement storage warehouse, to regulate size distribution and the pattern of cement mutually to make up, carry out ready-made well behaved mixed cement.
As another kind of improvement of the present invention, the dust-collection air pipe of described Vertical Mill is connected with the outlet airduct of V-type powder separating machine, and Vertical Mill is worked under micro-negative pressure, avoids dust in Vertical Mill to emit outward, heat during postscript, grinding being produced is taken Vertical Mill out of, extends the work-ing life of Vertical Mill grinding component.
Beneficial effect:
1, the high-efficient grinding function of efficiency crushing, grinding function and the tuber grinder of giving full play to Vertical Mill to fine powder, makes the mill efficiency of system higher, thereby reduces the grinding energy of system.
2, powder separating machine is placed in outside Vertical Mill, reduces the resistance of Vertical Mill own, by fine powder grinding in tuber grinder, make Vertical Mill operation more stable.
3, V-type powder separating machine is connected with meticulous powder separating machine, carry out meal and fine powder select powder to separate to carry out, thereby improve grinding efficiency, and then effectively avoid powder to occur grinding.
4, the finished cement B that the finished cement A that Vertical Mill grinds grinds with tuber grinder mixes, carry out cement grating and granule-morphology carry out reasonably combined, thereby guarantee that cement performance is good.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is a kind of improved process flow sheet of the present invention.
1 is conveyor, and 2 is metal detector, and 3 is T-valve, and 4 is Vertical Mill, and 5 is bucket elevator, and 6 is V-type powder separating machine, and 7 is meticulous powder separating machine, and 8 is dust-precipitator, and 9 is blower fan, and 10 is skewed slot I, and 11 is tuber grinder, and 12 is T-piece splitting valve, and 13 is skewed slot II.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, 2, the invention provides a kind of cement outer circulation Vertical Mill half final grinding system, comprise conveyor 1, metal detector 2, T-valve 3, Vertical Mill 4, bucket elevator 5, dust-precipitator 8, blower fan 9, skewed slot I 10, tuber grinder 11, skewed slot II13, powder selection device, powder selection device is placed in outside Vertical Mill 4, powder selection device is in series by V-type powder separating machine 6 and meticulous powder separating machine 7, the fine powder of V-type powder separating machine 6 enters meticulous powder separating machine 7, and meal returns to Vertical Mill 4; The fine powder of meticulous powder separating machine 7 is elected finished cement A as, and the meal of meticulous powder separating machine 7 divides two-way, and Vertical Mill 4 is returned on a road, and another road enters tuber grinder 11 and ground as finished cement B;
Vertical Mill 4, bucket elevator 5, V-type powder separating machine 6 are connected successively, form a recycle system; Vertical Mill 4, bucket elevator 5, V-type powder separating machine 6, meticulous powder separating machine 7 are connected successively, form a recycle system; Vertical Mill 4, bucket elevator 5, V-type powder separating machine 6, meticulous powder separating machine 7, tuber grinder 11, skewed slot II 13 are connected successively, form the preparation system of finished cement B; Vertical Mill 4, bucket elevator 5, V-type powder separating machine 6, meticulous powder separating machine 7, skewed slot I 10 are connected successively, form the preparation system of finished cement A.
As a modification of the present invention scheme, as shown in Figure 2, below the meal blanking scraper-trough conveyer of meticulous powder separating machine 7, be provided with T-piece splitting valve 12, two discharge opening pipelines of T-piece splitting valve 12 connect respectively Vertical Mill 4 and tuber grinder 11.
As another kind of improvement project of the present invention, as shown in Figure 2, the finished cement A that described meticulous powder separating machine 7 is selected carries by skewed slot I 10, and the finished cement B that tuber grinder 11 grinds carries by skewed slot II 13, after two skewed slot finished cements are mixed into mixed cement, enters cement storage warehouse.
As a modification of the present invention scheme, as shown in Figure 2, the dust-collection air pipe of described Vertical Mill 4 is connected with the outlet airduct of V-type powder separating machine 6.
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 (4)
1. cement outer circulation Vertical Mill half final grinding system, comprise conveyor (1), metal detector (2), T-valve (3), Vertical Mill (4), bucket elevator (5), dust-precipitator (8), blower fan (9), skewed slot I (10), tuber grinder (11), skewed slot II (13), it is characterized in that: also comprise the powder selection device being placed in outside Vertical Mill (4), powder selection device is in series by V-type powder separating machine (6) and meticulous powder separating machine (7), the fine powder of V-type powder separating machine (6) enters meticulous powder separating machine (7), and meal returns to Vertical Mill (4); The fine powder of meticulous powder separating machine (7) is elected finished cement A as, and the meal of meticulous powder separating machine (7) divides two-way, and Vertical Mill (4) is returned on a road, and another road enters tuber grinder (11) and ground as finished cement B;
Vertical Mill (4), bucket elevator (5), V-type powder separating machine (6) are connected successively, form a recycle system; Vertical Mill (4), bucket elevator (5), V-type powder separating machine (6), meticulous powder separating machine (7) are connected successively, form a recycle system; Vertical Mill (4), bucket elevator (5), V-type powder separating machine (6), meticulous powder separating machine (7), tuber grinder (11), skewed slot II (13) are connected successively, form the preparation system of finished cement B; Vertical Mill (4), bucket elevator (5), V-type powder separating machine (6), meticulous powder separating machine (7), skewed slot I (10) are connected successively, form the preparation system of finished cement A;
Material from proportioning station feeds outer circulation Vertical Mill (4) through conveyor (1), grinding through outer circulation Vertical Mill, go out Vertical Mill pulverulent material through bucket elevator (5) feeding V-type powder separating machine (6), through V-type powder separating machine (6), roughly select, compared with fine powder body, enter meticulous powder separating machine (7), meal returns to outer circulation Vertical Mill (4); V-type powder separating machine (6) compared with fine powder body, through meticulous powder separating machine (7), select powder, the more fine powder body of selecting is as cement products A, coarse dispersion enters tuber grinder (11) and carries out grinding and obtain finished cement B partially.
2. a kind of cement outer circulation Vertical Mill according to claim 1 half final grinding system, it is characterized in that: the meal blanking scraper-trough conveyer below at meticulous powder separating machine (7) is provided with T-piece splitting valve (12), and two discharge opening pipelines of T-piece splitting valve (12) connect respectively Vertical Mill (4) and tuber grinder (11).
3. a kind of cement outer circulation Vertical Mill according to claim 1 half final grinding system, it is characterized in that: the finished cement A that described meticulous powder separating machine (7) is selected carries by skewed slot I (10), the finished cement B that tuber grinder (11) grinds carries by skewed slot II (13), after two skewed slot finished cements are mixed into mixed cement, enters cement storage warehouse.
4. a kind of cement outer circulation Vertical Mill according to claim 1 half final grinding system, is characterized in that: the dust-collection air pipe of described Vertical Mill (4) is connected with the outlet airduct of V-type powder separating machine (6).
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| CN201410481631.XA CN104211312B (en) | 2014-09-19 | 2014-09-19 | A kind of cement outer circulation Vertical Mill half final grinding system |
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| CN201410481631.XA CN104211312B (en) | 2014-09-19 | 2014-09-19 | A kind of cement outer circulation Vertical Mill half final grinding system |
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| CN104211312B CN104211312B (en) | 2016-05-25 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106396442A (en) * | 2015-07-27 | 2017-02-15 | 南京凯盛国际工程有限公司 | Cement grinding and metering process |
| CN107552199A (en) * | 2016-07-01 | 2018-01-09 | 南京凯盛国际工程有限公司 | Outer circulation vertical mill grinding process system |
| CN108355968A (en) * | 2018-04-24 | 2018-08-03 | 南京凯盛国际工程有限公司 | A kind of dry-method sand manufacturing system and method |
| CN108373280A (en) * | 2018-01-30 | 2018-08-07 | 天津水泥工业设计研究院有限公司 | A kind of technique recycled for discarded concrete aggregate and cementitious material |
| CN108787049A (en) * | 2017-05-04 | 2018-11-13 | 上海熠炎自动化科技有限公司 | Cement grinding system |
| CN109513515A (en) * | 2019-01-08 | 2019-03-26 | 中建材（合肥）粉体科技装备有限公司 | A kind of system being used to prepare desulfurization mountain flour |
| CN110523501A (en) * | 2018-05-25 | 2019-12-03 | 合肥中亚建材装备有限责任公司 | A kind of full outer circulation raw material vertical mill mill is outer to select powder grinding process system |
| CN113976277A (en) * | 2021-10-18 | 2022-01-28 | 天津水泥工业设计研究院有限公司 | Cement external circulation vertical mill combined high-performance grinding process system |
| CN115254374A (en) * | 2022-06-30 | 2022-11-01 | 徐州桐圣建材有限公司 | Vertical mill device capable of increasing grinding efficiency of cement raw materials for cement processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN108373280A (en) * | 2018-01-30 | 2018-08-07 | 天津水泥工业设计研究院有限公司 | A kind of technique recycled for discarded concrete aggregate and cementitious material |
| CN108355968A (en) * | 2018-04-24 | 2018-08-03 | 南京凯盛国际工程有限公司 | A kind of dry-method sand manufacturing system and method |
| CN108355968B (en) * | 2018-04-24 | 2024-04-05 | 中材国际智能科技有限公司 | Dry sand making system and method |
| CN110523501A (en) * | 2018-05-25 | 2019-12-03 | 合肥中亚建材装备有限责任公司 | A kind of full outer circulation raw material vertical mill mill is outer to select powder grinding process system |
| CN109513515A (en) * | 2019-01-08 | 2019-03-26 | 中建材（合肥）粉体科技装备有限公司 | A kind of system being used to prepare desulfurization mountain flour |
| CN113976277B (en) * | 2021-10-18 | 2023-01-31 | 天津水泥工业设计研究院有限公司 | Cement external circulation vertical mill combined high-performance grinding process system |
| CN113976277A (en) * | 2021-10-18 | 2022-01-28 | 天津水泥工业设计研究院有限公司 | Cement external circulation vertical mill combined high-performance grinding process system |
| CN115254374B (en) * | 2022-06-30 | 2023-08-15 | 徐州桐圣建材有限公司 | Can increase grinding efficiency's of cement raw materials vertical mill device for cement processing |
| CN115254374A (en) * | 2022-06-30 | 2022-11-01 | 徐州桐圣建材有限公司 | Vertical mill device capable of increasing grinding efficiency of cement raw materials for cement processing |
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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. |