CN101665334A - Method and system for grinding circulating flow-distribution cement - Google Patents

Method and system for grinding circulating flow-distribution cement Download PDF

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Publication number
CN101665334A
CN101665334A CN200910092847A CN200910092847A CN101665334A CN 101665334 A CN101665334 A CN 101665334A CN 200910092847 A CN200910092847 A CN 200910092847A CN 200910092847 A CN200910092847 A CN 200910092847A CN 101665334 A CN101665334 A CN 101665334A
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CN
China
Prior art keywords
grinding
cement
distribution
meal
circulating flow
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CN200910092847A
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Chinese (zh)
Inventor
肖忠明
何力
郭俊萍
程伟
席劲松
任丽云
李文武
宋立春
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China Building Materials Academy CBMA
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China Building Materials Academy CBMA
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Priority to CN200910092847A priority Critical patent/CN101665334A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention relates to a method and a system for grinding circulating flow-distribution cement, belonging to the technical field of inorganic nonmetallic material powder. The system comprises a weighing and feeding device, a grinding device, a sorting device, a dust collecting device and a delivery system and further comprises a circulating flow-distribution device and a homogenizing device, wherein a feeding opening of the circulating flow-distribution device is connected with a coarse powder outlet opening of the sorting device, a separating stabber is arranged in the circulating flow-distribution device, a flow-distribution outlet at one side of the separating stabber is connected with a coarse powder inlet of the homogenizing device, and a discharging opening at the other side of theseparating stabber is connected with a feeding opening of the grinding device; and a fine powder inlet of the homogenizing device is connected with an outlet of the dust collecting device. In the method, the coarse powder generated by sorting is partially separated by metering and then is mixed with the fine powder to form finished cement. The invention performs flow-distribution and recycling onthe coarse powder separated by the sorting device on the basis of the prior cement closed circuit grinding process, thereby having the advantages of more reasonable distribution of finished cement particles, superior product performance, high grinding efficiency of the cement system, low power consumption, convenient control, and the like.

Description

A kind of grinding circulating flow-distribution cement method and system
Technical field
The invention belongs to ceramic powder grinding technology field, relate to cement grinding process, be specifically related to a kind of method and system of grinding circulating flow-distribution cement.
Background technology
In the Cement Production process, grinding operation is a very important operation, yield and quality and comprehensive cost to cement have very important influence, the cement closed-circuit grinding system is widely used in the grinding operation of manufacture of cement with the low advantage of its output high energy consumption at present, comprising traditional ball mill closed-circuit grinding system, roller press combination closed-circuit grinding system.Powder separating machine is the main frame of separation system, is an important component part in the grinding machine closed-circuit grinding system, cause its grinding efficiency difference because dissimilar powder separating machine structures is different with principle of work, so the unit power consumption of grinding system also exists difference.
Cement closed-circuit grinding system in the known technology is as shown in Figure 2: enter grinding device (grinding machine) from feed bin through the material of batching metering, material behind grinding enters powder separating machine by corresponding delivery system and carries out sorting, the fine powder that separation system produces is collected by dust collecting system (bag collector) and is become finished cement, and the meal that separation system produces directly enters grinding machine and carries out once more grinding, thereby forms a closed cycle grinding system.
The finished cement of this cement closed-circuit grinding explained hereafter is the fine powder that size distribution is concentrated because size distribution is very unreasonable, cause the use properties of cement poor, later strength increase slow, the performance of cement potential is few.Therefore in existing grinding system, optimize cement performance, improve mill efficiency, to reduce the system unit energy consumption necessary.
Summary of the invention
For improve in the existing cement closed-circuit grinding technology ubiquitous cement granules distribute concentrate, cement use properties difference and the few weakness of cement potential performance, the object of the present invention is to provide a kind of novel grinding circulating flow-distribution cement method, this method can produced the cement products of better performance on the basis that overcomes the prior art shortcoming under lower unit consumption of energy.Another purpose of the present invention is the grinding circulating flow-distribution cement system that provides supporting.
This grinding circulating flow-distribution cement system, comprise dosing feeder, grinding device, sorting unit, dust arrester installation and delivery system, also comprise circulation part flow arrangement and homogenization device, the material inlet of part flow arrangement of wherein circulating connects the meal outlet of sorting unit, establish material distributing cone in the circulation part flow arrangement, the shunting material outlet of material distributing cone one side connects the meal import of homogenization device, and the material outlet of material distributing cone opposite side connects the material inlet of grinding device; The fine powder import of homogenization device connects the outlet of dust arrester installation.
Described circulation part flow arrangement comprises a passage that is connected with the outlet of sorting unit meal, the two-layer lock aerofoil of installing in the passage, passage bottommost installing material distributing cone, material distributing cone one side is communicated with an overflow device, the material distributing cone opposite side is communicated with a powder e Foerderanlage, and the outlet of returning the powder e Foerderanlage is connected with grinding device.
Described overflow device connects a measuring apparatus, establishes a control flashboard between overflow device and the measuring apparatus, and the outlet of measuring apparatus is connected with the meal import of homogenization device.
All install the two-screw conveyer structure in described overflow device and time powder e Foerderanlage.
Grinding circulating flow-distribution cement method provided by the invention, use aforementioned grinding circulating flow-distribution cement system, may further comprise the steps: will enter grinding device through the material of batching metering, material behind grinding enters sorting unit by delivery system, after being collected by dust arrester installation, the fine powder that sorting unit produces enters homogenization device, after entering the circulation part flow arrangement, the meal that sorting unit produces is divided into two parts again, a part enters homogenization device by measuring apparatus, be mixed into finished cement with fine powder wherein, a part of in addition meal reenters grinding device and carries out once more grinding by returning the powder e Foerderanlage.
In this method, the ratio of meal circulation shunting is regulated according to the kind of cement, fineness that material goes out grinding device and the granulometric composition of meal.
In this method, describedly enter meal by circulation part flow arrangement and overflow device through the measuring apparatus weighing, reach established standards after, the closing control flashboard.
Adopt above technical scheme, the present invention proposes the method that meal circulation shunting utilizes again, and constituted New Cycle flow-distribution cement grinding system by circulation part flow arrangement and corresponding feedback control system thereof, make full use of existing cement closed-circuit grinding system, just can produce high performance cement products through simple the transformation, and improve the mill efficiency of system, reduce production energy consumption, the blended materials that utilize are realized energy-saving and emission-reduction more.
Advantage and positively effect that the present invention has are embodied in:
1. reduced the energy consumption of difficult mill of part and active low material, it has been entered finished cement as the micro-aggregate function ingredients.
2. improve the grinding probability of phase commute grind materials and active material, improved the whole hydrating capacity of cement products.
3. optimize the granulometric composition of cement, improved the performance of cement in concrete is used.
4. under the situation of the identical fineness of control cement products, be expected to improve more than the strength of cement 3MPa, can utilize industrial residue more than 6% more.
5. under the identical situation of control strength of cement, improve mill output 10%-15%.
6. the part of production technique changes, and makes full use of meal in the production system, can effectively reduce the circulating load rate of system, is guaranteeing under the prerequisite that mill feed size meets the demands, and can also give full play to the grinding potential of grinding machine.
Description of drawings
Fig. 1 is the synoptic diagram of grinding circulating flow-distribution cement technology (comprising method and system) among the present invention
Fig. 2 is common cement closed-circuit grinding process schematic representation
Fig. 3 is the structural representation of circulation part flow arrangement in the grinding circulating flow-distribution cement of the present invention system
Embodiment
In order to understand content of the present invention, characteristics and effect more, describe the specific implementation process of grinding circulating flow-distribution cement technology in detail below in conjunction with accompanying drawing:
The present invention refers in particular to a kind of technology that grog, gypsum and blended material grinding is become finished cement, be on the basis of existing cement closed-circuit grinding technology (referring to Fig. 2), setting up circulation shunting link, the meal in original production system is shunted by a certain percentage and being mixed with fine powder and form finished cement with grain size distribution.
Grinding circulating flow-distribution cement system's formation of the present invention and technical process are referring to shown in Figure 1.In this system, comprised dosing feeder 1, grinding device 2, sorting unit (containing powder separating machine) 3, circulation part flow arrangement 4, dust arrester installation 5, homogenization device 6 and delivery system (pipeline), wherein, feeding unit 1, grinding device 2, sorting unit 3, the Design and Features of dust arrester installation 5 and existing cement closed-circuit grinding system (referring to Fig. 2) is identical, the material inlet 41 of the circulation part flow arrangement of setting up 4 connects the meal outlet of sorting unit 3, circulation part flow arrangement 4 is established two material outlets, one of them shunting material outlet 42 connects the meal import 62 of homogenization device 6, and another material outlet 43 connects the material inlet of grinding device 2; The fine powder import 61 of homogenization device 6 connects the outlet of dust arrester installation 5, and meal import 62 connects the shunting material outlet 42 of circulation part flow arrangement 4, and the outlet 63 of homogenization device 6 is used to emit finished cement of the present invention.
In the present invention, described dosing feeder is according to different cement types, to correlative measure respectively, proportioning and the mechanism that mixes.Described grinding device comprises and can carry out grinding operation and with the various devices of material grinding to certain fineness, mainly comprise ball mill, roll squeezer, Vertical Mill etc. material.Described sorting unit comprises all kinds of powder separating machines that can be divided into the material that enters sorting unit according to certain standard fine powder (finished product) and meal based on elutriation.Described delivery system mainly is to connect each device to be used to transmit the handling equipment of material and pipeline etc.
In the system of the present invention, realize the shunting of material coarse fodder by circulation part flow arrangement 4.The circulation part flow arrangement be have to the powder material that enters this system shunt, the device of metering and conveying function.Fig. 3 shows a kind of concrete structure, this circulation part flow arrangement 4 comprises a passage that is connected with the meal outlet of powder separating machine in the sorting unit 3, the passage top is circulation part flow arrangement 4 material inlets 41, the two-layer lock aerofoil 44 of installing is in order to cut off wind outside in the passage, and lower floor's lock aerofoil 44 and formation current stabilization storehouse, passage bottom are used to pile up the meal from powder separating machine; The passage bottommost is installed a material distributing cone 45, material distributing cone 45 1 sides are communicated with an overflow device 46, material distributing cone 45 opposite sides are communicated with a powder e Foerderanlage 47, all install the two-screw conveyer structure in overflow device 46 and time powder e Foerderanlage 47, in order to the meal of material distributing cone 45 both sides is carried to both sides, the outlet of returning powder e Foerderanlage 47 is establishes circulation part flow arrangement 4 material outlets 43, is connected with grinding device 2; Overflow device 46 connects the meal of a measuring apparatus 48 in order to the weighing shunting in addition, establish a control flashboard 49 between overflow device 46 and the measuring apparatus 48, when the meal of measuring apparatus 48 weighings reaches setting weight, can intercept the meal that enters from overflow device 46 by control flashboard 49; The outlet of measuring apparatus 48 is establishes circulation part flow arrangement 4 shunting material outlets 42, is connected with the meal import 62 of homogenization device 6.
Grinding circulating flow-distribution cement technical process of the present invention is referring to shown in Figure 1: be stored in cement raw material in the feed bin (as grog, slag, gypsum, Wingdale, flyash etc.) according to the cement type of being produced, enter into grinding device through behind the metering proportion by delivery system, when material is entered with the powder separating machine after the certain fineness by grinding is in the separation system of main frame, material forms two bursts of streams after by sorting, wherein one is a fine powder, collected by dust arrester installation (bag collector) through corresponding pipeline, this part is identical with original cement closed-circuit grinding technological process; Another strand material is a meal, meal at first enters the shunting circulation device that the present invention sets up, the shunting circulation device is according to relevant real-time production data and relevant criterion, realize meal is shunted by a certain percentage by the feedback control of data being utilized material distributing cone, form two portions meal, wherein the fine powder of collecting through the meal and the dust collecting system of measuring apparatus shunting mixes in homogenization device, form final finished cement, a part of in addition meal returns grinding device to be continued grinding and delivers to realization closed cycle operation in the powder separating machine once more.
In technological process of the present invention, the existing fine powder of the finished cement that obtains, the meal of suitable proportion has reasonable, the more superior characteristics of cement performance of cement granules distribution in addition.Under the situation of the identical fineness of control cement products, improve more than the strength of cement 3MPa; According to Chinese cement production statistic data, every raising strength of cement 1MPa just can utilize industrial residue 2% more, therefore uses finished cement of the present invention can utilize industrial residue more than 6% more.
The grinding circulating flow-distribution cement system of the present invention's design, total system is a negative-pressure operation, provides subnormal ambient by the afterbody blower fan, under the identical situation of control strength of cement, improves mill output 10%-15%.
The present invention relates to meal circulation dividing technology and not only be fit to newly-built cement grinding system, be more suitable in the transformation of original cement grinding system.
The present invention can describe with reference to above technology in specific implementation process, and according to the working condition of particular case design cement grinding system, for example, for newly-built cement grinding system, the condition that need obtain comprises: meteorological conditions: temperature, humidity, sea level elevation; Starting material condition: raw-material chemical constitution, the kind of producing cement and output, material balance table, proportioning, grindability; Finished cement: go out the fineness of grinding device and the granulometric composition of meal, the fineness and the specific surface area of finished product.
For the transformation of Portland cement closed-circuit grinding system, the condition that need obtain comprises: the starting material condition: raw-material chemical constitution, the kind of producing cement and output, material balance table, proportioning, grindability; Finished cement: go out the fineness of grinding device and the granulometric composition of meal, the fineness and the specific surface area of finished product, every physical and chemical performance of existing finished cement etc.
According to the related production condition that obtains, principle of design according to grinding circulating flow-distribution cement technology is carried out system design, principal security produces meal to separation system and carries out abundant reasonable use on the basis of improving cement use properties, raising grinding system mill efficiency, reduction unit consumption of energy, make grinding circulating flow-distribution cement technology become a kind of efficient, controlled, stable cement production system.
The effect example:
Adopt that the present invention shunts that circulation technology uses that example sees Table 1, shown in table 2 and the table 3, its empty cement is control sample, returns powder and refers to branch to meal in the cement products.
The result finds out from table, adopts the cement of explained hereafter of the present invention, is keeping under the identical situation of cement specific surface area, and the use properties of cement is obviously improved (strength of cement improves more than the 3MPa); Even specific surface area increases (as B series), the consumptive use of water normal consistence of cement also descends to some extent, is better than blank cement.On mechanical property, under the situation that keeps same specific surface area, intensity increases, and the specific surface area level of cement is high more, and the amplitude that intensity increases is big more.
Table 1C series cement sample ligand ratio, parameter and performance
Table 2S series cement sample ligand ratio, parameter and performance
Table 3B series cement sample ligand ratio, parameter and performance

Claims (7)

1, a kind of grinding circulating flow-distribution cement system, comprise dosing feeder, grinding device, sorting unit, dust arrester installation and delivery system, it is characterized in that: also comprise circulation part flow arrangement and homogenization device, the material inlet of part flow arrangement of wherein circulating connects the meal outlet of sorting unit, establish material distributing cone in the circulation part flow arrangement, the shunting material outlet of material distributing cone one side connects the meal import of homogenization device, and the material outlet of material distributing cone opposite side connects the material inlet of grinding device; The fine powder import of homogenization device connects the outlet of dust arrester installation.
2, according to the described grinding circulating flow-distribution cement of claim 1 system, it is characterized in that: described circulation part flow arrangement comprises a passage that is connected with the outlet of sorting unit meal, the two-layer lock aerofoil of installing in the passage, passage bottommost installing material distributing cone, material distributing cone one side is communicated with an overflow device, the material distributing cone opposite side is communicated with a powder e Foerderanlage, and the outlet of returning the powder e Foerderanlage is connected with grinding device.
3, according to the described grinding circulating flow-distribution cement of claim 2 system, it is characterized in that: described overflow device connects a measuring apparatus, establishes a control flashboard between overflow device and the measuring apparatus, and the outlet of measuring apparatus is connected with the meal import of homogenization device.
4, according to claim 2 or 3 described grinding circulating flow-distribution cement systems, it is characterized in that: described overflow device and return in the powder e Foerderanlage and all install the two-screw conveyer structure.
5, a kind of grinding circulating flow-distribution cement method, use the described grinding circulating flow-distribution cement of claim 4 system, may further comprise the steps: will enter grinding device through the material of batching metering, material behind grinding enters sorting unit by delivery system, after being collected by dust arrester installation, the fine powder that sorting unit produces enters homogenization device, after entering the circulation part flow arrangement, the meal that sorting unit produces is divided into two parts again, a part enters homogenization device by measuring apparatus, be mixed into finished cement with fine powder wherein, a part of in addition meal reenters grinding device and carries out once more grinding by returning the powder e Foerderanlage.
According to the described grinding circulating flow-distribution cement method of claim 5, it is characterized in that 6, the ratio of meal circulation shunting is regulated according to the kind of cement, fineness that material goes out grinding device and the granulometric composition of meal.
7, according to the described grinding circulating flow-distribution cement method of claim 6, it is characterized in that, describedly enter meal by circulation part flow arrangement and overflow device through the measuring apparatus weighing, reach established standards after, the closing control flashboard.
CN200910092847A 2009-09-09 2009-09-09 Method and system for grinding circulating flow-distribution cement Pending CN101665334A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102153300A (en) * 2011-05-06 2011-08-17 吴江市明港道桥工程有限公司 Cement pulverizing system and method
CN103149887A (en) * 2011-12-30 2013-06-12 中国科学院沈阳自动化研究所 Intelligent control method applied to central discharge type cement raw mill system
CN103495482A (en) * 2013-09-29 2014-01-08 长沙深湘通用机器有限公司 Smashing and sorting technology as well as smashing and sorting system
CN104326682A (en) * 2014-11-12 2015-02-04 中冶焦耐工程技术有限公司 Device and method for preparing ultrafine light calcined magnesia powder
CN107074652A (en) * 2014-07-28 2017-08-18 海德堡水泥公司 The method for grinding clinker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102153300A (en) * 2011-05-06 2011-08-17 吴江市明港道桥工程有限公司 Cement pulverizing system and method
CN103149887A (en) * 2011-12-30 2013-06-12 中国科学院沈阳自动化研究所 Intelligent control method applied to central discharge type cement raw mill system
CN103149887B (en) * 2011-12-30 2014-12-31 中国科学院沈阳自动化研究所 Intelligent control method applied to central discharge type cement raw mill system
CN103495482A (en) * 2013-09-29 2014-01-08 长沙深湘通用机器有限公司 Smashing and sorting technology as well as smashing and sorting system
CN107074652A (en) * 2014-07-28 2017-08-18 海德堡水泥公司 The method for grinding clinker
CN104326682A (en) * 2014-11-12 2015-02-04 中冶焦耐工程技术有限公司 Device and method for preparing ultrafine light calcined magnesia powder

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Application publication date: 20100310