CN108855557B - Vertical mill production system capable of switching production of cement or mineral powder - Google Patents
Vertical mill production system capable of switching production of cement or mineral powder Download PDFInfo
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- CN108855557B CN108855557B CN201811010399.6A CN201811010399A CN108855557B CN 108855557 B CN108855557 B CN 108855557B CN 201811010399 A CN201811010399 A CN 201811010399A CN 108855557 B CN108855557 B CN 108855557B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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Abstract
The invention relates to a vertical mill production system capable of switching production of cement or mineral powder, which is used for grinding cement clinker or slag, wherein the vertical mill production system capable of switching production of cement or mineral powder comprises: a feeding device for feeding cement clinker or slag; the vertical mill is connected with the feeding device and is used for grinding the cement clinker powder into cement or grinding the slag powder into mineral powder; the bag dust collector is connected with the vertical mill and is used for collecting cement or mineral powder; the high-pressure fan is arranged at a position corresponding to the bag-type dust collector and is used for driving cement or mineral powder in the vertical mill to enter the bag-type dust collector; the conveying device is connected with the bag dust collector and is used for conveying cement or mineral powder; at least two finished product storehouses are connected with the conveying device. The invention well solves the problem of mutual switching between grinding cement and mineral powder, and the switching process of the switching system is simple, thereby bringing real economic benefit for enterprises.
Description
Technical Field
The invention relates to a vertical mill production system, in particular to a vertical mill production system capable of switching production of cement or mineral powder.
Background
The raw materials for producing cement in the prior art are cement clinker, the raw materials for producing mineral powder are slag, and because the water content of the cement clinker and the water content of the slag are different, drying is not needed during grinding of the cement, and the drying is needed during grinding of the mineral powder, so that a vertical mill production system in the prior art can only produce cement singly or produce mineral powder singly, but cement and mineral powder are produced simultaneously in the same enterprise.
Therefore, the method in the prior art needs to be provided with at least two independent vertical mill production systems for respectively producing cement and mineral powder, and because the vertical mill production systems occupy a large space and are high in cost, if the two independent vertical mill production systems are arranged, the production occupied area of an enterprise can be increased, the production cost of the enterprise is increased, the operation cost of the enterprise is low, and meanwhile, the high-profit production mode of the existing enterprise cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vertical mill production system capable of switching production of cement or mineral powder, which has the functions of producing cement and mineral powder simultaneously so as to solve the technical problem, and the specific technical scheme is as follows: the vertical mill production system for producing cement or mineral powder in a switchable manner is used for grinding cement clinker or slag, and comprises: a feeding device for feeding cement clinker or slag; the vertical mill is connected with the feeding device and is used for grinding the cement clinker powder into cement or grinding the slag powder into mineral powder; the bag dust collector is connected with the vertical mill and is used for collecting cement or mineral powder; the high-pressure fan is arranged at a position corresponding to the bag-type dust collector and is used for driving cement or mineral powder in the vertical mill to enter the bag-type dust collector; the conveying device is connected with the bag dust collector and is used for conveying cement or mineral powder; the finished product storehouses are connected with the conveying device, and the cement or mineral powder collected in the bag-type dust collector is conveyed to the finished product storehouses through the conveying device; the chimney is used for exhausting high-temperature gas in the vertical mill; one end of the air return pipeline is connected with the lower part of the chimney, and the other end of the air return pipeline is connected with an air inlet of the vertical mill; the return air control valve is arranged on the return air pipeline; the hot air system is used for providing hot air for the opposite mill; one end of the hot air supply pipeline is connected with the hot air system, and the other end of the hot air supply pipeline is connected with an air inlet of the vertical mill; the electric hot air valve is arranged on the hot air supply pipeline; the cold air supply pipeline is connected with an air inlet of the vertical mill and used for supplying cold air to the vertical mill; and the electric cold air valve is arranged on the cold air supply pipeline.
When the vertical mill production system capable of switching production of cement or mineral powder produces cement, cement clinker enters the vertical mill through the feeding device, the electric hot air valve is closed, the hot air system stops supplying hot air to the vertical mill, the electric cold air valve is opened, the cold air supply pipeline supplies cold air to the vertical mill, the return air control valve is opened, the high-pressure fan is started and drives the cement which is ground in the vertical mill to enter the bag dust collector, and the conveying device conveys the cement collected in the bag dust collector to the finished product warehouse; during changeable cement or the mineral powder of production of vertical mill production system, the slay passes through feed arrangement and gets into vertical mill, and electronic hot-blast valve is opened, and hot air system provides the hot-blast to vertical mill, and electronic cold blast valve is closed, and cold wind supply pipeline stops to provide cold wind to vertical mill, and the return air control valve is opened, and high pressure positive blower starts and drives the interior mineral powder that grinds the completion of vertical mill and gets into the sack dust collector, and conveyor carries the mineral powder of collecting in the sack dust collector to the finished product storehouse.
In a possible design, the vertical mill ventilation control device is further included, and the electric hot air valve, the electric cold air valve and the return air control valve are respectively connected with the vertical mill ventilation control device and are controlled to be opened or closed through the vertical mill ventilation control device.
In one possible design, the discharge port of the vertical mill is connected with the feed port of the bag dust collector through a first conveying pipe.
In a possible design, the vertical mill production system capable of switching production of cement or mineral powder further comprises a cold air compensation valve, a cold air source and a second conveying pipe, wherein the cold air source is connected with the first conveying pipe through the second conveying pipe, and the cold air compensation valve is arranged on the second conveying pipe.
In a possible design, the feeding device further comprises at least two raw material storehouses, a metering device arranged at the lower end of each raw material storehouse, a belt conveying device arranged at the lower end of each raw material storehouse, a raw material lifting machine arranged at the discharge end of the belt conveying device and at least one pre-scattering machine, wherein the pre-scattering machine is arranged below the discharge end of the belt conveying device, and the arrangement position of each pre-scattering machine corresponds to the position of the feed inlet of each vertical mill.
In one possible design, the switchable production system of the vertical mill for producing cement or mineral powder further comprises a blanking valve, and a feeding port of the vertical mill is connected with the corresponding pre-scattering machine through the blanking valve.
In one possible design, both the vertical mill and the pre-breaker are one in number.
In one possible design, the hot air system comprises a coal bunker, a coal belt conveyor, a crusher, a lifter, a pulverized coal bunker, a disk feeder and a hot air furnace which are sequentially connected, the hot air furnace is further connected with a hot air furnace blower, and the hot air furnace is connected with a hot air supply pipeline.
In one possible design, the conveying device comprises a conveying chute, a lifter and a finished product conveying chute which are connected in sequence, the conveying chute is arranged below the bag dust collector and corresponds to an outlet of the bag dust collector, and the finished product conveying chute is arranged above the finished product warehouse and corresponds to the finished product warehouse.
In one possible design, the vertical mill production system for producing cement or mineral powder in a switchable manner further comprises at least one gate valve, each gate valve corresponds to each finished product warehouse respectively, and the gate valves are used for controlling whether the cement or mineral powder is conveyed to the finished product warehouse or not.
Compared with the prior art, the invention has the advantages that:
1. the vertical mill production system capable of switching production of cement or mineral powder realizes grinding of materials with different water contents by switching among the electric hot air valve, the electric cold air valve and the return air control valve, and the same vertical mill is used as a grinding host machine for different materials, so that the production efficiency is high, the energy is saved, the market demand is met, and the economic value is high;
2. the vertical mill production system capable of switching production of cement or mineral powder well solves the problem of mutual switching of grinding cement and mineral powder, and the switching process of the switching system is simple, so that actual economic benefits are brought to enterprises.
Drawings
The invention is further illustrated by means of the attached drawings, the content of which is not in any way limitative of the invention.
Fig. 1 is a schematic view of a switchable cement or ore powder production vertical mill production system according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, in an embodiment of the present invention, a vertical mill production system 40 for switchable production of cement or mineral powder is disclosed, which is used for grinding cement clinker or slag, and includes a feeding device 1, at least one vertical mill 2, a bag dust collector 7, a high pressure fan 8, a conveying device, at least two product warehouses, a chimney 9, a return air pipeline 10, a return air control valve 11, a hot air system 3, a hot air supply pipeline 19, an electric hot air valve 4, a cold air supply pipeline 20, and an electric cold air valve 5, wherein:
the feeding device 1 is used for feeding cement clinker or slag, the feeding device 1 disclosed in the embodiment further comprises at least two raw material storehouses 101, a metering device 102 arranged at the lower end of each raw material storehouse 101, a belt conveying device 103 arranged at the lower end of each raw material storehouse 101, a raw material elevator 104 arranged at the discharge end of the belt conveying device 103 and at least one pre-scattering machine 105, the pre-scattering machine 105 is arranged below the discharge end of the belt conveying device 103, the arrangement position of each pre-scattering machine 105 corresponds to the position of the feed inlet of each vertical mill 2, in the devices disclosed in the embodiment, at least one set of raw material storehouse 101, metering device 102 and belt conveying device 103 is used for providing the feeding of the cement clinker, and at least another set of raw material storehouse 101, metering device 102 and belt conveying device 103 is used for providing the mineral powder clinker, and each set of raw material storehouses 101, The metering device 102 and the belt conveyor 103 are generally controlled individually or in combination, but the individual control is convenient for operation and channel arrangement and collection, and is a preferred embodiment.
In a preferred embodiment, a feeding valve 24 is further arranged below the pre-scattering machine 105, and the feeding valve 24 is connected with a feeding port of the vertical mill 2 corresponding to the feeding valve, so that when the system is switched to use, the efficiency of renovation, maintenance and cleaning is high, and the use is convenient.
In a preferred embodiment, the number of the vertical mill 2 and the pre-scattering machine 105 is one, so as to reduce the occupied space of the system and the production cost, and enable enterprises to obtain a larger profit model.
At least one vertical mill 2 is connected to the feeding device 1, the vertical mill 2 is used for grinding cement clinker into cement or slag into mineral powder, and there is no special requirement for the selection of the vertical mill in the present invention, and the selection is made according to the routine selection in the field.
The cloth bag dust collector 7 is connected with the vertical mill 2, the discharge port 202 of the vertical mill 2 disclosed in the embodiment is connected with the feed port 701 of the cloth bag dust collector 7 through the first conveying pipe 39, and the cloth bag dust collector 7 is used for collecting cement or mineral powder.
In a preferred embodiment, the cloth bag dust collector further comprises a cold air compensation valve 6, a cold air source 23 and a second conveying pipe 22, wherein the cold air source 23 is connected with the first conveying pipe 39 through the second conveying pipe 22, the cold air compensation valve 6 is arranged on the second conveying pipe 22, the cold air compensation valve 6 and the cold air source 23 are used for cooling the cloth bag dust collector 7, when the inlet temperature of the cloth bag dust collector 7 is too high, the cold air compensation valve 6 is opened to reduce the temperature of the cloth bag dust collector 7, and the cloth bag dust collector 7 is protected from being scalded, so that the design has the advantages of mature technology, low cost and convenience in use.
The high-pressure fan 8 is arranged at a position corresponding to the cloth bag dust collector 7, the high-pressure fan 8 is used for driving cement or mineral powder in the vertical mill 2 to enter the cloth bag dust collector 7, the air pressure of the high-pressure fan 8 is optimal when the high-pressure fan can just pump the qualified cement or mineral powder ground in the vertical mill 2 into the cloth bag dust collector 7, and the air pressure is preferably 7 kPa-8 KPa.
The conveying device comprises a conveying chute 12, a lifting machine 13 and a finished product conveying chute 14 which are sequentially connected, the conveying chute 12 is arranged below the bag dust collector 7 and corresponds to an outlet of the bag dust collector 7, and the finished product conveying chute 14 is arranged above the finished product warehouse and corresponds to the finished product warehouse, but the conveying device disclosed in the embodiment is not limited.
At least two finished product storehouses are connected with the conveying device, and cement or mineral powder collected in the bag-type dust collector 7 is conveyed to the finished product storehouses through the conveying device, wherein at least one finished product storehouse is used for collecting cement, and at least one finished product storehouse is used for collecting mineral powder.
In a preferred embodiment, the system further comprises a plurality of gate valves, each gate valve corresponds to each finished product warehouse respectively, and the gate valves are used for controlling whether cement or mineral powder is conveyed to the finished product warehouse, so that the designed gate valves are suitable for a switching system for producing cement and mineral powder, and are also suitable for producing cement and mineral powder independently, the number of the gate valves disclosed in the embodiment is two, wherein the first gate valve 15 corresponds to the first finished product warehouse 17 and is used for controlling whether mineral powder is conveyed to the first finished product warehouse 17, and the second gate valve 16 corresponds to the second finished product warehouse 18 and is used for controlling whether cement is conveyed to the second finished product warehouse 18.
The chimney 9 is used for exhausting high-temperature gas in the vertical mill 2, and the chimney 9 can be selected without special requirements in the invention according to the conventional selection in the field.
One end of the air return pipeline 10 is connected with the lower part of the chimney 9, the other end of the air return pipeline is connected with the air inlet 201 of the vertical mill 2, and through the design of the air return pipeline 10, the good air return effect of the vertical mill can be ensured, meanwhile, the vertical mill 2 can be helped to collect high-temperature gas exhausted by a fan, and the drying capacity of the vertical mill 2 is improved.
The return air control valve 11 is arranged on the return air pipeline 10, and the opening and closing of the return air pipeline 10 are controlled by controlling the opening and closing of the return air control valve 11.
The hot air system 3 is connected with an air inlet 201 of the vertical mill 2 through a hot air supply pipeline 19 and is used for providing hot air for the vertical mill 2.
In a preferred embodiment, the hot air system 3 comprises a coal bunker 31, a coal belt conveyor 32, a crusher 33, a lifter 34, a coal dust bunker 35, a disk feeder 36 and a hot air furnace 37 which are connected in sequence, the hot air furnace 37 is further connected with a hot air furnace blower 38, the hot air furnace is connected with a hot air supply pipeline 19, in the working process, coal blocks in the coal bunker 31 are conveyed to the crusher 33 through the belt conveyor 32 to be crushed into small particles, the small particles are conveyed to the coal dust bunker 35 through the lifter 34, coal dust is scattered into the burning hot air furnace 37 through the disk feeder 36, and the hot air furnace blower 38 blows air to the bottom of the hot air furnace 37 to blow up the coal dust particles, so that the coal dust particles are burned in a hearth, and continuous hot air is provided for the system.
The electric hot air valve 4 is arranged on the hot air supply pipeline 19, and the hot air supply pipeline 19 is connected with the hot air system 3 through the electric hot air valve 4 and provides hot air for drying and heating the vertical mill 2.
The cold air supply pipeline 20 is connected with an air inlet 201 of the vertical mill 2, the electric cold air valve 5 is arranged on the cold air supply pipeline 20, and the cold air supply pipeline 20 provides cold air for the vertical mill through the electric cold air valve 5.
When the vertical mill production system 40 capable of switching production of cement or mineral powder is used for producing cement, cement clinker enters the vertical mill 2 through the feeding device 1, the electric hot air valve 4 is closed, the hot air system 3 stops supplying hot air to the vertical mill 2, the electric cold air valve 5 is opened, the cold air supply pipeline 20 supplies cold air to the vertical mill 2, the return air control valve 11 is opened, the high-pressure fan 8 is started and drives the cement ground in the vertical mill 2 to enter the bag dust collector 7, and the conveying device conveys the cement collected in the bag dust collector 7 to a finished product warehouse, namely conveys the cement to the second finished product warehouse 18 through the conveying chute 12, the lifting machine 13, the finished product conveying chute 14 and the second gate valve 16.
When the vertical mill production system 40 capable of switching production of cement or mineral powder is used for producing mineral powder, slag enters the vertical mill 2 through the feeding device 1, the electric hot air valve 4 is opened, the hot air system 3 supplies hot air to the vertical mill 2, the electric cold air valve 5 is closed, the cold air supply pipeline 20 stops supplying cold air to the vertical mill 2, the return air control valve 11 is opened, the high-pressure fan 8 is started and drives mineral powder ground in the vertical mill 2 to enter the bag-type dust collector 7, and the conveying device conveys the mineral powder collected in the bag-type dust collector 7 to a finished product warehouse, namely the mineral powder is conveyed to the first finished product warehouse 17 through the conveying chute 12, the elevator 13, the finished product conveying chute 14 and the first gate valve 15.
In a preferred embodiment, when the vertical mill production system 40 capable of switching production of cement or mineral powder is switched from production of slag to production of cement, the electric hot air valve 4 is opened and the hot air system 3 is preheated for the vertical mill for more than 10 minutes, so that moisture in the vertical mill is removed completely, then the electric hot air valve 4 is closed, and the electric cold air valve 5 is opened to normally operate the cement vertical mill to process cement powder.
In a preferred embodiment, the vertical mill ventilation control device 21 is further included, and the electric hot air valve 4, the electric cold air valve 5 and the return air control valve 11 are respectively connected with the vertical mill ventilation control device 21 and are controlled to be opened or closed through the vertical mill ventilation control device 21, so that the working efficiency of the vertical mill system is improved.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A vertical mill production system capable of switching production of cement or mineral powder is used for grinding cement clinker or slag, and is characterized by comprising:
a feeding device for feeding the cement clinker or slag;
at least one vertical mill connected with the feeding device, wherein the vertical mill is used for grinding the cement clinker powder into cement or grinding the slag powder into mineral powder;
the bag dust collector is connected with the vertical mill and is used for collecting the cement or the mineral powder;
the high-pressure fan is arranged at a position corresponding to the bag-type dust collector and is used for driving the cement or the mineral powder in the vertical mill to enter the bag-type dust collector;
the conveying device is connected with the bag dust collector and is used for conveying the cement or the mineral powder;
at least two finished product storehouses connected with the conveying device, and the cement or the mineral powder collected in the bag-type dust collector is conveyed to the finished product storehouses through the conveying device;
the chimney is used for exhausting high-temperature gas in the vertical mill;
one end of the air return pipeline is connected with the lower part of the chimney, and the other end of the air return pipeline is connected with an air inlet of the vertical mill;
the return air control valve is arranged on the return air pipeline;
the hot air system is used for providing hot air for the vertical mill;
one end of the hot air supply pipeline is connected with the hot air system, and the other end of the hot air supply pipeline is connected with an air inlet of the vertical mill;
the electric hot air valve is arranged on the hot air supply pipeline;
the cold air supply pipeline is connected with an air inlet of the vertical mill and used for providing cold air for the vertical mill; and
the electric cold air valve is arranged on the cold air supply pipeline;
when the vertical mill production system capable of switching production of cement or mineral powder produces the cement, cement clinker enters the vertical mill through the feeding device, the electric hot air valve is closed, the hot air system stops supplying hot air to the vertical mill, the electric cold air valve is opened, the cold air supply pipeline supplies cold air to the vertical mill, the return air control valve is opened, the high-pressure fan is started and drives the cement which is ground in the vertical mill to enter the bag dust collector, and the conveying device conveys the cement collected in the bag dust collector to the finished product warehouse;
during changeable cement or powdered ore's vertical mill production system production powdered ore, the slay passes through feed arrangement gets into the vertical mill, electronic hot-blast valve is opened, hot-blast system is right the vertical mill provides hot-blast, electronic cold-blast valve is closed, cold-blast supply line stops right the vertical mill provides cold wind, the return air control valve is opened, high pressure positive blower starts and drives grind the completion in the vertical mill the powdered ore gets into the cloth bag dust collector, conveyor will collect in the cloth bag dust collector the powdered ore carry extremely the finished product storehouse.
2. The switchable cement or ore powder production vertical mill production system according to claim 1, further comprising a vertical mill ventilation control device, wherein the electric hot air valve, the electric cold air valve and the return air control valve are respectively connected with the vertical mill ventilation control device and are controlled to be opened or closed by the vertical mill ventilation control device.
3. The switchable cement or ore powder production vertical mill production system according to claim 1, wherein the discharge port of the vertical mill is connected with the feed port of the bag dust collector through a first conveying pipe.
4. The switchable cement or ore fines production vertical mill production system of claim 3, further comprising a cold air compensation valve, a cold air source, and a second delivery pipe, wherein the cold air source is connected to the first delivery pipe through the second delivery pipe, and the cold air compensation valve is disposed on the second delivery pipe.
5. The switchable cement or ore powder production vertical mill production system according to claim 1, wherein the feeding device further comprises at least two raw material storehouses, a metering device arranged at the lower end of each raw material storehouse, a belt conveyor arranged at the lower end of each raw material storehouse, a raw material elevator arranged at the discharge end of the belt conveyor, and at least one pre-scattering machine, the pre-scattering machine is arranged below the discharge end of the belt conveyor, and the arrangement position of each pre-scattering machine corresponds to the position of the feed inlet of each vertical mill.
6. The switchable cement or ore powder production vertical mill system according to claim 5, further comprising a blanking valve, wherein the feeding port of the vertical mill is connected with the pre-scattering machine corresponding to the feeding port of the vertical mill through the blanking valve.
7. The switchable cement or ore fines production vertical mill system of claim 5, wherein the vertical mill and the pre-breaker are each one in number.
8. The vertical mill production system capable of switching production of cement or mineral powder according to claim 1, wherein the hot air system comprises a coal bunker, a coal belt conveyor, a crusher, a lifter, a pulverized coal bunker, a disk feeder and a hot air furnace which are connected in sequence, the hot air furnace is further connected with a hot air furnace blower, and the hot air furnace is connected with the hot air supply pipeline.
9. The switchable cement or ore powder production vertical mill production system according to claim 1, wherein the conveying device comprises a conveying chute, a hoist and a finished product conveying chute which are connected in sequence, the conveying chute is arranged below the bag dust collector and corresponds to an outlet of the bag dust collector, and the finished product conveying chute is arranged above the finished product warehouse and corresponds to the finished product warehouse.
10. The switchable cement or ore fines production vertical mill system of claim 9, further comprising a plurality of gate valves, each gate valve corresponding to each finished product warehouse, the gate valves being used to control whether the cement or ore fines are transported to the finished product warehouse.
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| CN111841824A (en) * | 2019-04-24 | 2020-10-30 | 合肥中亚建材装备有限责任公司 | Slag and cement combined grinding production line |
| CN110237692A (en) * | 2019-06-03 | 2019-09-17 | 浙江菲达环保科技股份有限公司 | A kind of cement kiln end flue gas desulfurization device |
| CN110773306B (en) * | 2019-11-05 | 2021-08-03 | 汝州同远新材料有限公司 | Material grinding system, process and material receiving device for grinding system |
| CN112275434A (en) * | 2020-10-19 | 2021-01-29 | 稷山县华越建材有限公司 | Production process convenient for manufacturing slag micro powder |
| CN113117875A (en) * | 2021-04-19 | 2021-07-16 | 厦门兑泰环保科技有限公司 | Comprehensive production process of tailing micro powder |
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| DE4307230A1 (en) * | 1993-03-08 | 1994-09-15 | Krupp Polysius Ag | Process and plant for comminuting the bed of brittle regrind |
| CN103934082A (en) * | 2014-05-14 | 2014-07-23 | 南通利元亨机械有限公司 | Novel mineral slag grinding system |
| CN204174109U (en) * | 2014-09-30 | 2015-02-25 | 济南大学 | A kind of closed circuit cement Joint grinding system |
| CN204638326U (en) * | 2015-03-13 | 2015-09-16 | 浙江拓翔建材有限公司 | A kind of slag milling control system of modified node method |
| CN104707706A (en) * | 2015-03-13 | 2015-06-17 | 浙江拓翔建材有限公司 | Slag powder grinding control system |
| CN204638281U (en) * | 2015-03-13 | 2015-09-16 | 浙江拓翔建材有限公司 | A kind of slag milling device |
| CN108080123B (en) * | 2017-11-17 | 2019-10-15 | 邯郸金隅太行水泥有限责任公司 | A kind of cement grinding mill machine washing mill method |
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