CN210304032U - Cement grinding system for realizing particle size preparation by adopting double powder selection of mill tail - Google Patents
Cement grinding system for realizing particle size preparation by adopting double powder selection of mill tail Download PDFInfo
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- CN210304032U CN210304032U CN201921070418.4U CN201921070418U CN210304032U CN 210304032 U CN210304032 U CN 210304032U CN 201921070418 U CN201921070418 U CN 201921070418U CN 210304032 U CN210304032 U CN 210304032U
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Abstract
The utility model provides a cement grinding system which adopts double powder selection at the tail of a mill to realize particle size preparation, comprising a raw material bin, a pre-grinding system before the mill, a ball mill and a dust collector at the tail of the mill; the pre-grinding system comprises a feeding elevator, a material stabilizing bin, a roller press, a discharging elevator, a V-shaped powder concentrator and a pre-grinding fine powder collector; the raw material bin is connected to the material stabilizing bin by a feeding elevator; connecting a fine powder collector to a ball mill before grinding; particularly, the device also comprises a tail grinding double powder selecting system which comprises a tail grinding hoister, a tail grinding powder selecting machine, a tail grinding superfine powder selecting machine, a tail grinding fine powder dust collector and a tail grinding superfine powder dust collector; a discharge port of the ball mill, a tail grinding elevator, a tail grinding powder concentrator and a feed port of the ball mill are connected in series to form a first circulation loop of a tail grinding material; the discharge port of the ball mill, the tail grinding elevator, the tail grinding superfine powder concentrator and the feed port of the ball mill are connected in series to form a second circulation loop of the tail grinding material. The utility model discloses the cement product particle size distribution of preparation is wide, the fineness is steady, can realize the accurate preparation of particle size.
Description
Technical Field
The utility model relates to a cement manufacture technical field specifically is go out circulation selection powder system of mill cement.
Background
At present, cement grinding mainly adopts two processes of open-circuit grinding and closed-circuit grinding. The material is a finished product by passing through the mill once, which is called an open mill, and the open mill is characterized by less equipment, simple flow, simple and convenient operation, low water demand for cement, low unit yield, high power consumption and high cement temperature; the closed circuit mill is characterized by high production rate, low power consumption, low cement temperature, complex flow and high water demand of cement. The application number 201621355159.6 discloses a semi-open and semi-closed mill cement circulation powder selecting system, which comprises a ball mill, a lifter, an air conveying chute, a powder selecting machine and a dust collector, wherein a discharge hole of the ball mill, the lifter, the air conveying chute, the powder selecting machine and a feed inlet of the ball mill are sequentially communicated, a fine powder outlet pipe of the powder selecting machine is communicated with an air inlet end of the dust collector, and a discharge end of the dust collector and the air conveying chute are respectively communicated with a finished cement conveying device. The existing semi-open and semi-closed type mill-discharging cement circulating powder selecting system integrates the advantages of an open mill and a closed mill, wherein part of mill-discharging cement is used as one part of a finished product, the rest mill-discharging cement is efficiently selected by a powder selecting machine, fine cement powder is collected by a dust collector to be used as the other part of the finished product, and the fine cement powder and the part of mill-discharging cement are mixed to prepare finished cement, so that the purposes of widening cement particle gradation and reducing cement water demand are achieved. The disadvantages are that: the fineness of the milled cement has large fluctuation, which is easy to cause the fineness fluctuation of the prepared cement; the preparation process is not monitored by metering, the preparation proportion cannot be accurately adjusted, the fineness of a finished product cannot be better obtained, and the unqualified fineness is easy to generate and needs to be improved.
Disclosure of Invention
The utility model aims at providing an adopt two selection powders of mill tail to realize the cement grinding system that the particle diameter was prepared, the cement product particle diameter distribution of its preparation is wide, the fineness is steady, can realize the accurate preparation of particle diameter.
The utility model discloses a following technical scheme of purpose accessible realizes:
a cement grinding system for realizing particle size preparation by adopting double powder selection at the tail of a mill comprises a raw material bin, a pre-grinding system before milling, a ball mill and a dust collector at the tail of the mill.
The pre-grinding system comprises a feeding hoister, a material stabilizing bin, a roller press, a discharging hoister, a V-shaped powder concentrator and a pre-grinding fine powder collector, wherein the discharging end of the feeding hoister is communicated with the feeding end of the material stabilizing bin, the discharging end of the roller press is communicated with the feeding end of the discharging hoister, the discharging end of the discharging hoister is communicated with the feeding end of the V-shaped powder concentrator, and a coarse material outlet, the material stabilizing bin and the roller press of the V-shaped powder concentrator are sequentially communicated.
The discharge end of the raw material bin is communicated to the feed end of a feed elevator of the pre-grinding system before grinding; an air inlet of a pre-grinding fine powder collector in the pre-grinding system is communicated with a fine powder outlet of the V-shaped powder concentrator, and a discharge port of the pre-grinding fine powder collector is communicated with a feed port of the ball mill; a tail grinding air pipe of the ball mill is communicated with an air inlet of a tail grinding dust collector, and a discharge hole of the tail grinding dust collector is communicated with a conveying pipe of a finished product warehouse.
The method is characterized in that: the tail grinding double-powder-selecting system comprises a tail grinding hoister, a tail grinding powder selecting machine, a tail grinding superfine powder selecting machine, a tail grinding fine powder dust collector and a tail grinding superfine powder dust collector.
The feeding end of the tail grinding elevator is communicated with the discharge port of the ball mill, the discharge end of the tail grinding elevator is communicated with a tail grinding conveying pipe, a material distributing valve is arranged in the tail end of the tail grinding conveying pipe, and the tail end of the tail grinding conveying pipe is respectively communicated with the feeding port of the tail grinding powder concentrator and the feeding port of the tail grinding superfine powder concentrator.
The coarse material outlet of the mill tail powder concentrator is communicated to the feeding port of the ball mill, and the discharge port of the ball mill, the mill tail elevator, the mill tail powder concentrator and the feeding port of the ball mill are connected in series to form a first circulation loop of mill tail materials.
The coarse material outlet of the mill tail superfine powder concentrator is communicated to the feeding port of the ball mill, and the discharge port of the ball mill, the mill tail elevator, the mill tail superfine powder concentrator and the feeding port of the ball mill are connected in series to form a mill tail material second circulation loop.
The fine powder outlet of the tail grinding fine powder separator is communicated with the air inlet of the tail grinding fine powder dust collector, the fine powder outlet of the tail grinding ultrafine powder separator is communicated with the air inlet of the tail grinding ultrafine powder dust collector, and the discharge hole of the tail grinding fine powder dust collector and the discharge hole of the tail grinding ultrafine powder dust collector are communicated with a material conveying pipe of a finished product warehouse.
The coarse material outlet end of the tail grinding and powder selecting machine is provided with a powder selecting machine regrinding coarse powder meter, and the coarse material outlet end of the tail grinding and superfine powder selecting machine is provided with a superfine powder selecting machine regrinding coarse powder meter.
The utility model discloses well mill tail fine powder dust collector and mill tail superfine powder dust collector can be replaced by 1 two selection powder dust collectors of mill tail, mill tail two selection powder dust collector's air intake passes through the fine powder export of a three-way valve one branch link respectively through the fine powder export of mill tail selection powder machine and the fine powder export of mill tail superfine selection powder machine.
The discharge port of the middle mill tail ultrafine powder dust collector of the utility model can further be respectively connected with a finished product warehouse delivery pipe and an ultrafine cement delivery pipe through two three-way valves.
According to the technical scheme, the utility model discloses still including 2 sets of automatic samplings send a kind device, automatic sampling send a kind device to send ware and spiral sampler including gas holder, powder memory, powder.
The powder storage device is of an inverted cone shell structure, a storage device feeding port is formed in the top end of the powder storage device, a feeding valve is installed on the storage device feeding port, a storage device discharging port is formed in the bottom end of the powder storage device, a discharging valve is installed on the bottom end of the powder storage device, and an air inlet pipe is communicated with the top end of the powder storage device.
The powder material sender is provided with a sending shell part, a mixing shell part and a pressure expansion shell part which are sequentially end-butted; the sending shell part is a circular cylinder structure which is transversely arranged, and the top of the sending shell part is provided with a sending device feeding port; the mixing shell part is a transversely arranged circular cylinder structure, the inner diameter of the mixing shell part is smaller than that of the sending shell part, the sending shell part is in transitional connection with the mixing shell part through a horn-shaped cylinder with gradually narrowed inner diameter, the tail end of the mixing shell part is butted with a pressure expansion shell part with gradually widened inner diameter, and the tail end of the pressure expansion shell part is provided with a gas-material mixing outlet; the one end that sends the shell and keep away from mixing the shell seals and has penetrated the air cock, the end of giving vent to anger of air cock is located the sender pan feeding mouth below that sends the shell.
The spiral sampler is arranged above the powder storage device, the discharge port end of the spiral sampler is communicated with the feed valve of the powder storage device, the powder storage device is arranged above the powder transmitter, and the discharge valve of the powder storage device is communicated with the feed port of the powder transmitter; the air outlet end of the air storage tank is respectively communicated with the air inlet end of the air nozzle of the powder transmitter and the air inlet pipe of the powder storage device through a three-way air pipe.
The automatic sampling and sample feeding device is used as a tail grinding sampling and sample feeding device, and the feed end of a spiral sampler of the tail grinding sampling and sample feeding device is communicated with a tail grinding conveying pipe.
And the other 1 set of automatic sampling and sample feeding device is used as a finished product sampling and sample feeding device, and the feed end of a spiral sampler of the finished product sampling and sample feeding device is communicated with a conveying pipe of a finished product warehouse.
Further optimize the scheme, the utility model discloses a 2 sets of automatic sampling send appearance device's powder to send the generator discharge gate of ware to the back flow, the back flow communicates to the finished product storehouse conveying pipeline, be equipped with online granularity detector on the end of back flow, online granularity detector's feed end and discharge end are managed intercommunication back flow respectively.
Further optimization scheme again, the utility model discloses a grind tail conveying pipeline and have concatenated the scummer near the one end of grinding the tail lifting machine.
Further optimize the scheme, the utility model discloses an air outlet of fine powder collector before grinding through the air intake of first fan intercommunication V type selection powder machine, through the air intake of the superfine selection powder machine of second fan intercommunication tail of grinding.
The utility model has the following substantive characteristics and progress.
1. The utility model adopts a tail grinding double powder selecting system, one part of the ground cement passes through a tail grinding powder selecting machine to select and remove particles with overlarge particle size, and the fineness of the ground cement (referred to as fine powder for short) output by a fine powder outlet is relatively stable; the other part of the milled cement passes through a mill tail superfine powder concentrator, the milled cement (superfine powder for short) output from a fine powder outlet has finer fineness, and the cement prepared by the milling tail superfine powder concentrator has wider particle size distribution, thereby meeting the requirements of reducing water demand and improving strength.
2. The utility model discloses can be through adjusting the aperture of depiler valve, the regulation grinds the pan feeding volume proportion of tail selection powder machine and the superfine selection powder machine of mill tail, and then the proportion of the stable fine powder volume of adjustment and superfine powder volume realizes the accurate preparation of cement finished product particle diameter.
3. The utility model discloses further automatic sampling sample presentation device through grinding the tail to and send sample presentation device through off-the-shelf automatic sampling, and monitor through online granularity detector and grind cement fineness and finished product cement fineness, divide material valve aperture through the regulation, realize the automatic accurate preparation of cement finished product particle diameter.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the automatic sampling and sample feeding device of the present invention.
Fig. 3 is another schematic structural diagram of the present invention.
Fig. 4 is a schematic view of another structure of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Example 1
Referring to fig. 1 and 2, a cement grinding system for realizing particle size preparation by using double powder selection at mill tail comprises a raw material bin 1, a pre-grinding system before milling, a ball mill 4, a dust collector 41 at mill tail, a double powder selection system at mill tail and 2 sets of automatic sampling and sample feeding devices.
The pre-grinding system comprises a feeding hoister 20, a material stabilizing bin 22, a roller press 23, a discharging hoister 2, a V-shaped powder concentrator 21 and a pre-grinding fine powder collector 3, wherein the discharging end of the feeding hoister 20 is communicated with the feeding end of the material stabilizing bin 22, the discharging end of the roller press 23 is communicated with the feeding end of the discharging hoister 2, the discharging end of the discharging hoister 2 is communicated with the feeding end of the V-shaped powder concentrator 21, and the coarse material outlet of the V-shaped powder concentrator 21, the material stabilizing bin 22 and the roller press 23 are sequentially communicated.
The discharge end of the raw material bin 1 is communicated to the feed end of a feed elevator 20 of the pre-grinding system before grinding; an air inlet of a pre-grinding fine powder collector 3 in the pre-grinding system is communicated with a fine powder outlet of the V-shaped powder concentrator 21, and a discharge port of the pre-grinding fine powder collector is communicated with a feed port of the ball mill 4; and a tail grinding air pipe of the ball mill 4 is communicated with an air inlet of a tail grinding dust collector 41, and a discharge hole of the tail grinding dust collector 41 is communicated with a material conveying pipe 10 of the finished product warehouse.
The tail grinding double powder selecting system comprises a tail grinding elevator 42, a tail grinding powder selecting machine 5, a tail grinding superfine powder selecting machine 6, a tail grinding fine powder dust collector 51 and a tail grinding superfine powder dust collector 61.
The feeding end of the mill tail elevator 42 is communicated with the discharging port of the ball mill 4, the discharging end is communicated with a mill tail conveying pipe 40, one end of the mill tail conveying pipe 40 close to the mill tail elevator 42 is connected with a slag separator 44 in series, a material distributing valve 43 is arranged in the tail end, and the tail end of the mill tail conveying pipe 40 is respectively communicated with the feeding port of the mill tail powder concentrator 5 and the feeding port of the mill tail superfine powder concentrator 6.
The coarse material outlet of the mill tail powder concentrator 5 is communicated to the feeding port of the ball mill 4, and the discharge port of the ball mill 4, the mill tail elevator 42, the mill tail powder concentrator 5 and the feeding port of the ball mill 4 are connected in series to form a first cycle loop of mill tail materials.
The coarse material outlet of the mill tail superfine powder concentrator 6 is communicated to the feeding port of the ball mill 4, and the discharge port of the ball mill 4, the mill tail elevator 42, the mill tail superfine powder concentrator 6 and the feeding port of the ball mill 4 are connected in series to form a mill tail material second circulation loop.
A fine powder outlet of the tail grinding fine powder separator 5 is communicated with an air inlet of a tail grinding fine powder dust collector 51, a fine powder outlet of the tail grinding ultrafine powder separator 6 is communicated with an air inlet of a tail grinding ultrafine powder dust collector 61, and a discharge hole of the tail grinding fine powder dust collector 51 and a discharge hole of the tail grinding ultrafine powder dust collector 61 are communicated with a material conveying pipe 10 of a finished product warehouse.
The coarse material outlet end of the mill tail powder selector 5 is provided with a mill tail coarse powder selector 50, and the coarse material outlet end of the mill tail superfine powder selector 6 is provided with a superfine mill tail coarse powder selector 60.
An air outlet of a pre-grinding fine powder collector 3 in the pre-grinding system is communicated with an air inlet of the V-shaped powder concentrator 21 through a first fan 31 and is communicated with an air inlet of the tail grinding superfine powder concentrator 6 through a second fan 32.
The automatic sampling and sample-feeding device comprises an air storage tank 7, a powder storage 8, a powder transmitter 9 and a spiral sampler 80.
The powder storage device 8 is of an inverted cone shell structure, the top end of the powder storage device 8 is provided with a storage device feeding port and is provided with a feeding valve 81, the bottom end of the powder storage device 8 is provided with a storage device discharging port and is provided with a discharging valve 82, and the top end of the powder storage device 8 is communicated with an air inlet pipe 83.
The powder material sender 9 is provided with a sending shell part 91, a mixing shell part 92 and a pressure expansion shell part 93 which are sequentially end-butted; the sending shell part 91 is a transversely arranged circular cylinder structure, and the top of the sending shell part is provided with a sending device feeding port; the mixing shell part 92 is a transversely arranged circular cylinder structure, the inner diameter of the mixing shell part is smaller than that of the sending shell part 91, the sending shell part 91 is in transitional connection with the mixing shell part 92 through a trumpet-shaped cylinder with gradually narrowed inner diameter, the tail end of the mixing shell part 92 is in butt joint with a pressure expansion shell part 93 with gradually widened inner diameter, and the tail end of the pressure expansion shell part 93 is provided with a gas-material mixing outlet; the end of the sending shell part 91 far away from the mixing shell part 92 is closed and penetrated with an air tap 94, and the air outlet end of the air tap 94 is located below the sender feeding port of the sending shell part 91.
The spiral sampler 80 is arranged above the powder storage device 8, the discharge port end of the spiral sampler 80 is communicated with the feed valve 81 of the powder storage device 8, the powder storage device 8 is arranged above the powder transmitter 9, and the discharge valve 82 of the powder storage device 8 is communicated with the transmitter feed port of the powder transmitter 9; the air outlet end of the air storage tank 7 is respectively communicated with the air inlet end of an air nozzle 94 of the powder transmitter 9 and the air inlet pipe 83 of the powder storage 8 through a three-way air pipe.
The 1 set of automatic sampling and sample feeding device is used as a tail grinding sampling and sample feeding device, and the feed end of a spiral sampler 80 of the tail grinding sampling and sample feeding device is communicated with a tail grinding feed delivery pipe 40.
The other 1 set of automatic sampling and sample feeding device is used as a finished product sampling and sample feeding device, and the feed end of a spiral sampler 80 of the finished product sampling and sample feeding device is communicated with a conveying pipe 10 of a finished product warehouse.
The discharge port of the generator of the powder transmitter 9 of the 2 sets of automatic sampling and sample feeding devices is communicated to a return pipe 100, the return pipe 100 is communicated to a material conveying pipe 10 of a finished product warehouse, the tail end of the return pipe 100 is provided with an online granularity detector 101, and the feed end and the discharge end of the online granularity detector 101 are respectively communicated with the return pipe 100 through pipes.
In the operation process of the cement grinding system of the embodiment, the flow direction of the materials is as follows.
1. The cement raw material is selected by the raw material bin 1 → the feeding hoister 20 → the material stabilizing bin 22 of the pre-grinding system before grinding → the roller press 23 → the discharging hoister 2 → the V-type powder concentrator 21, after the powder is selected by the V-type powder concentrator 21, the coarse material outlet of the V-type powder concentrator 21 discharges the pre-grinding coarse material → the material stabilizing bin 22 → the roller press 23 → the discharging hoister 2 → the V-type powder concentrator 21, and the cyclic powder selection of the pre-grinding coarse material is realized by the pre-grinding system before grinding.
2. The fine powder outlet of the V-type powder concentrator 21 → the pre-mill fine powder collector 3 → the ball mill 4.
3. After the powder is ground by the ball mill 4, the discharge port of the ball mill 4 → the mill tail elevator 42 → the mill tail delivery pipe 40 → the slag remover 44, and the material distributing valve 43 is adjusted and controlled to divide the mill tail into two paths:
part of the mill tailings → the mill tailing 5 → the mill tailing fine powder dust collector 51 → the finished product warehouse material conveying pipe 10, as the fine powder component of the finished cement.
The other part of the milltailings → the milltailing superfine powder concentrator 6 → the milltailing superfine powder dust collector 61 → the finished product warehouse material conveying pipe 10, which is used as the superfine powder component of the finished product cement.
Coarse powder is discharged from a coarse material outlet of the fine tail powder concentrator 5, and coarse powder is discharged from a coarse material outlet of the superfine tail powder concentrator 6 → the ball mill 4, and the coarse powder is ground by the ball mill 4 again.
The cement finished product prepared by the cement grinding system of the embodiment includes the fine powder separated by the mill tail powder separator 5 and the ultra-fine powder separated by the mill tail ultra-fine powder separator 6, and the feeding amount ratio of the mill tail powder separator 5 and the mill tail ultra-fine powder separator 6 is adjusted by adjusting the opening degree of the material separating valve 43, so that the ratio of the fine powder amount and the ultra-fine powder amount is adjusted, and the purpose of preparing and adjusting the particle size of the cement finished product is realized.
In the cement grinding system of this embodiment, the coarse powder regrinding meter 50 of the powder selecting machine and the coarse powder regrinding meter 60 of the ultra-fine powder selecting machine are respectively used to measure and calculate the yield of each path of powder in the system, and the yield of each path of powder is grasped in real time, so as to analyze the cause of the fineness change of the finished product and take measures in time.
In the operation process of the cement grinding system, the materials on the material conveying pipeline are conveyed into the powder storage 8 by the spiral sampler 80 through the feeding valve 81 through the automatic sampling and sample conveying device, and the sampling is stopped when the spiral sampler 80 operates to the set time or the material level in the powder storage 8 meets the requirement. The dry compressed gas enters the powder storage 8 through the gas inlet 83 and enters the powder transmitter 9 through the gas nozzle 94 from the gas storage tank 7, the dry compressed gas mixed with the sample is conveyed to the return pipe 100 from the powder transmitter 9, the particle size of the material is detected by the online particle size detector 101 when the dry compressed gas flows through the return pipe 100, and the material continues to return to a finished product conveying pipeline through the return pipe 100.
Wherein, the automatic sampling and sample feeding device is used for sampling and feeding the grinding tailing materials and the finished products respectively, and the online detector 101 is used for detecting and monitoring in real time. And analyzing the abnormal situation of the fineness in time, and adjusting the opening degree of the distributing valve 43 to ensure that the fineness of the finished product meets the requirement.
Example 2
Referring to fig. 3, the cement grinding system for realizing particle size preparation by using double powder selection at mill tail of the present embodiment is different from embodiment 1 in that: the mill tail fine powder dust collector 51 and the mill tail ultra-fine powder dust collector 61 of the mill tail double powder selection system are replaced by 1 mill tail double powder selection dust collector 500, and an air inlet of the mill tail double powder selection dust collector 500 is respectively connected with a fine powder outlet of the mill tail powder selection machine 5 and a fine powder outlet of the mill tail ultra-fine powder selection machine 6 through a three-way valve I501. The other structure is the same as that of embodiment 1. In this embodiment, the fine powder separated by the tail milling and powder selecting machine 5 and the ultra-fine powder separated by the tail milling and ultra-fine powder selecting machine 6 are collected and mixed by using one tail milling and double powder selecting dust collector 500, so that the method has the characteristics of reducing the number of equipment and investment of a tail milling and double powder selecting system and uniformly mixing the fine powder and the ultra-fine powder.
Example 3
Referring to fig. 4, the cement grinding system for realizing particle size preparation by using double powder selection at mill tail of the present embodiment is different from embodiment 1 in that: and a discharge hole of the tail grinding ultrafine powder dust collector 61 is respectively connected with a finished product warehouse delivery pipe 10 and an ultrafine cement delivery pipe 600 through a second three-way valve 601. Part of the ultrafine powder separated by the mill tail ultrafine powder separator 6 of the embodiment can be directly output as a finished product of ultrafine cement through the ultrafine cement conveying pipe 600. And adjusting the output quantity of the superfine cement finished product by adjusting the opening of the second three-way valve 601.
Claims (7)
1. A cement grinding system for realizing particle size preparation by adopting double powder selection of mill tails comprises a raw material bin (1), a pre-grinding system before grinding, a ball mill (4) and a mill tail dust collector (41);
the pre-grinding system comprises a feeding hoister (20), a material stabilizing bin (22), a roller press (23), a discharging hoister (2), a V-shaped powder concentrator (21) and a pre-grinding fine powder collector (3), wherein the discharging end of the feeding hoister (20) is communicated with the feeding end of the material stabilizing bin (22), the discharging end of the roller press (23) is communicated with the feeding end of the discharging hoister (2), the discharging end of the discharging hoister (2) is communicated with the feeding end of the V-shaped powder concentrator (21), and a coarse material outlet of the V-shaped powder concentrator (21), the material stabilizing bin (22) and the roller press (23) are sequentially communicated;
the discharge end of the raw material bin (1) is communicated to the feed end of a feed elevator (20) of the pre-grinding system before grinding; an air inlet of a pre-grinding fine powder collector (3) in the pre-grinding system is communicated with a fine powder outlet of the V-shaped powder concentrator (21), and a discharge port is communicated with a feed port of the ball mill (4); a tail grinding air pipe of the ball mill (4) is communicated with an air inlet of a tail grinding dust collector (41), and a discharge hole of the tail grinding dust collector (41) is communicated with a material conveying pipe (10) of a finished product warehouse;
the method is characterized in that: the tail grinding double-powder selecting system comprises a tail grinding hoister (42), a tail grinding powder selecting machine (5), a tail grinding superfine powder selecting machine (6), a tail grinding fine powder dust collector (51) and a tail grinding superfine powder dust collector (61);
the feeding end of the tail grinding elevator (42) is communicated with the discharge hole of the ball mill (4), the discharging end is communicated with a tail grinding conveying pipe (40), a material distributing valve (43) is arranged in the tail end of the tail grinding conveying pipe (40), and the tail end of the tail grinding conveying pipe (40) is respectively communicated with the feeding hole of the tail grinding powder concentrator (5) and the feeding hole of the tail grinding superfine powder concentrator (6);
a coarse material outlet of the mill tail powder selector (5) is communicated to a feeding port of the ball mill (4), and a discharge port of the ball mill (4), a mill tail elevator (42), the mill tail powder selector (5) and the feeding port of the ball mill (4) are connected in series to form a mill tail material first circulation loop;
a coarse material outlet of the tail grinding superfine powder concentrator (6) is communicated to a feeding port of the ball mill (4), and a discharging port of the ball mill (4), a tail grinding elevator (42), the tail grinding superfine powder concentrator (6) and the feeding port of the ball mill (4) are connected in series to form a tail grinding material second circulation loop;
a fine powder outlet of the tail grinding and powder selecting machine (5) is communicated with an air inlet of a tail grinding fine powder dust collector (51), a fine powder outlet of the tail grinding superfine powder selecting machine (6) is communicated with an air inlet of a tail grinding superfine powder dust collector (61), a discharge hole of the tail grinding fine powder dust collector (51) and a discharge hole of the tail grinding superfine powder dust collector (61) are communicated with a conveying pipe (10) of a finished product warehouse;
and a coarse material outlet end of the tail grinding and powder selecting machine (5) is provided with a powder selecting machine regrinding coarse powder meter (50), and a coarse material outlet end of the tail grinding and superfine powder selecting machine (6) is provided with a superfine powder selecting machine regrinding coarse powder meter (60).
2. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to claim 1, is characterized in that: the tail grinding fine powder dust collector (51) and the tail grinding ultrafine powder dust collector (61) are replaced by 1 tail grinding double powder selecting dust collector (500), and an air inlet of the tail grinding double powder selecting dust collector (500) is respectively connected with a fine powder outlet of the tail grinding powder selecting machine (5) and a fine powder outlet of the tail grinding ultrafine powder selecting machine (6) through a three-way valve I (501).
3. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to claim 1, is characterized in that: and a discharge hole of the tail grinding ultrafine powder dust collector (61) is respectively connected with a finished product warehouse delivery pipe (10) and an ultrafine cement delivery pipe (600) through a second three-way valve (601).
4. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to the claim 1, the 2 or the 3, characterized in that: the device also comprises 2 sets of automatic sampling and sample conveying devices, wherein each automatic sampling and sample conveying device comprises a gas storage tank (7), a powder storage device (8), a powder transmitter (9) and a spiral sampler (80);
the powder storage device (8) is of an inverted cone-shaped shell structure, a storage device feeding port and a feeding valve (81) are arranged at the top end of the powder storage device (8), a storage device discharging port and a discharging valve (82) are arranged at the bottom end of the powder storage device (8), and an air inlet pipe (83) is communicated with the top end of the powder storage device (8);
the powder material sender (9) is provided with a sending shell part (91), a mixing shell part (92) and a diffusion shell part (93) which are sequentially end-butted; the sending shell part (91) is a transversely arranged circular cylinder structure, and the top of the sending shell part is provided with a sending device feeding port; the mixing shell part (92) is a transversely arranged circular cylinder structure, the inner diameter of the mixing shell part is smaller than that of the sending shell part (91), the sending shell part (91) is in transitional connection with the mixing shell part (92) through a trumpet-shaped cylinder with gradually narrowed inner diameter, the tail end of the mixing shell part (92) is butted with a pressure expansion shell part (93) with gradually widened inner diameter, and the tail end of the pressure expansion shell part (93) is provided with a gas-material mixing outlet; one end of the sending shell part (91) far away from the mixing shell part (92) is closed and penetrates through an air nozzle (94), and the air outlet end of the air nozzle (94) is positioned below a material inlet of a sender of the sending shell part (91);
the spiral sampler (80) is arranged above the powder storage device (8), the discharge port end of the spiral sampler (80) is communicated with a feed valve (81) of the powder storage device (8), the powder storage device (8) is arranged above the powder transmitter (9), and a discharge valve (82) of the powder storage device (8) is communicated with a transmitter feed port of the powder transmitter (9); the air outlet end of the air storage tank (7) is respectively communicated with the air inlet end of an air nozzle (94) of the powder transmitter (9) and the air inlet pipe (83) of the powder storage device (8) through a three-way air pipe;
1 set of automatic sampling and sample feeding device is used as a tail grinding sampling and sample feeding device, and the feed end of a spiral sampler (80) of the tail grinding sampling and sample feeding device is communicated with a tail grinding feed delivery pipe (40);
the other 1 set of automatic sampling and sample feeding device is used as a finished product sampling and sample feeding device, and the feed end of a spiral sampler (80) of the finished product sampling and sample feeding device is communicated with a finished product warehouse feed pipe (10).
5. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to claim 4, is characterized in that: the discharge port of a generator of a powder transmitter (9) of the 2 sets of automatic sampling and sample feeding devices is communicated to a return pipe (100), the return pipe (100) is communicated to a finished product warehouse delivery pipe (10), an online granularity detector (101) is arranged at the tail end of the return pipe (100), and the feed end and the discharge end of the online granularity detector (101) are respectively communicated with the return pipe (100).
6. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to the claim 1, the 2 or the 3, characterized in that: and one end of the tail grinding conveying pipe (40) close to the tail grinding hoister (42) is connected with a slag remover (44) in series.
7. The cement grinding system adopting the double powder selection of the mill tail to realize the particle size preparation according to the claim 1, the 2 or the 3, characterized in that: the air outlet of the pre-grinding fine powder collector (3) is communicated with the air inlet of the V-shaped powder concentrator (21) through a first fan (31) and is communicated with the air inlet of the tail grinding superfine powder concentrator (6) through a second fan (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227600A (en) * | 2019-07-10 | 2019-09-13 | 陆有明 | A kind of cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair |
| CN112816371A (en) * | 2021-04-22 | 2021-05-18 | 南京兴盛德水泥有限公司 | System and method for measuring abrasive particle size of cement raw powder of ball mill |
| CN113457816A (en) * | 2021-07-01 | 2021-10-01 | 厦门艾思欧标准砂有限公司 | System and process for preparing spheroidized powder by adopting vertical grinding machine |
| CN113929326A (en) * | 2021-11-25 | 2022-01-14 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
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2019
- 2019-07-10 CN CN201921070418.4U patent/CN210304032U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227600A (en) * | 2019-07-10 | 2019-09-13 | 陆有明 | A kind of cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair |
| CN112816371A (en) * | 2021-04-22 | 2021-05-18 | 南京兴盛德水泥有限公司 | System and method for measuring abrasive particle size of cement raw powder of ball mill |
| CN113457816A (en) * | 2021-07-01 | 2021-10-01 | 厦门艾思欧标准砂有限公司 | System and process for preparing spheroidized powder by adopting vertical grinding machine |
| CN113929326A (en) * | 2021-11-25 | 2022-01-14 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
| CN113929326B (en) * | 2021-11-25 | 2023-02-28 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
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