CN215953613U - Small grinding test device for cement grinding aid - Google Patents
Small grinding test device for cement grinding aid Download PDFInfo
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- CN215953613U CN215953613U CN202121972642.XU CN202121972642U CN215953613U CN 215953613 U CN215953613 U CN 215953613U CN 202121972642 U CN202121972642 U CN 202121972642U CN 215953613 U CN215953613 U CN 215953613U
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- grinding aid
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- 238000000227 grinding Methods 0.000 title claims abstract description 92
- 239000004568 cement Substances 0.000 title claims abstract description 59
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 59
- 238000002156 mixing Methods 0.000 claims abstract description 53
- 238000012216 screening Methods 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 35
- 238000005303 weighing Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 11
- 239000007921 spray Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
A cement grinding aid small grinding test device comprises a grinding device, a screening device and a mixing and stirring device, wherein the screening device and the mixing and stirring device are positioned in a laboratory, and the grinding device is positioned outside the laboratory; the discharge port of the grinding device is connected with the feed port of the screening device through a sealed pipeline, and the sealed pipeline penetrates through the wall of the laboratory; the working space of the screening device is closed; the discharge hole of the screening device is connected with the feed inlet of a powder weighing device; the feed inlet of the mixing and stirring device is positioned below the discharge outlet of the powder weighing device, and the discharge outlet of the powder weighing device is connected with the feed inlet of the mixing and stirring device through a sealed pipeline; a spraying nozzle is arranged on the inner wall of a feed inlet of the mixing and stirring device, the spraying nozzle is connected with a high-pressure water pipe outside the mixing and stirring device through a pipeline, a grinding aid adding tank is also connected in series on the high-pressure water pipe, and an openable adding port is arranged on the grinding aid adding tank; the high-pressure water pipe is connected with a flowmeter and a valve.
Description
Technical Field
The utility model belongs to the technical field of cement processing, and particularly relates to a small grinding experimental device for a cement grinding aid.
Background
The cement grinding aid is not used for a long time, and the initial research and development of the grinding aid aims at grinding and improving the production efficiency. Along with the development, the problems of adaptability performance and the like of diversification of cement materials are promoted to promote the function/performance of the cement grinding aid to diversify, such as: the cement grinding aid can be specially prepared according to the requirements of cement manufacturers, and the performance of the cement is improved on the basis of the grinding aid function.
When the grinding aid is specially prepared, a multi-formula and multi-sample test is required according to the actual production condition, and the test is generally called as a small grinding test. The small grinding test is a set of work for simulating the production flow of finished cement, and mainly comprises 1, checking and washing the ball mill; 2. feeding according to a cement formula; 3. grinding finished cement according to standard time; 4. screening the milled finished cement; 5. mixing and stirring a cement sample in a stirring machine to prepare cement paste, or mixing the cement sample and standard sand in the stirring machine to prepare cement mortar, and finally stirring to prepare mortar; 6. taking cement paste or mortar to prepare a plurality of cement test blocks, and forming and maintaining the cement test blocks; 7. taking a cement test block according to experimental requirements for model breaking and data arrangement; 8. and analyzing and selecting according to the statistical data. The grinding aid can be added into the ball mill in step 2 or added into a stirring machine in step 5 according to different experimental modes.
In the small grinding experiment process, the steps 2-4 are continuous processes, and the equipment in the adjacent steps are connected through a closed pipeline and used for conveying cement, so that dust cannot leak. Before step 5, the cement needs to be weighed, and the cement is directly filled in a bottom aggregate bin of the screening device by the traditional method, then weighed by weighing, sent to a stirring device, added with water and the like for stirring. During the weighing process, the process of putting cement (powder) into the stirring device and the process of adding water, dust can be generated to cause dust leakage.
Disclosure of Invention
In order to solve the unpredictable errors caused by human intervention in the experimental process of improving the experimental consistency and simplifying the experimental process when the cement grinding aid is subjected to the small grinding test, the utility model provides a small grinding test device for the cement grinding aid, which comprises a grinding device, a screening device, a powder weighing device and a mixing and stirring device; the screening device and the mixing and stirring device are positioned in a laboratory, and the grinding device is positioned outside the laboratory;
the discharge port of the grinding device is connected with the feed port of the screening device through a sealed pipeline, and the sealed pipeline penetrates through the wall of the laboratory; the working space of the screening device is closed; the discharge hole of the screening device is connected with the feed inlet of a powder weighing device; the feed inlet of the mixing and stirring device is positioned below the discharge outlet of the powder weighing device, and the discharge outlet of the powder weighing device is connected with the feed inlet of the mixing and stirring device through a sealed pipeline;
a spraying nozzle is arranged on the inner wall of a feed inlet of the mixing and stirring device, the spraying nozzle is connected with a high-pressure water pipe outside the mixing and stirring device through a pipeline, a grinding aid adding tank is also connected in series on the high-pressure water pipe, and an openable adding port is arranged on the grinding aid adding tank; the high-pressure water pipe is connected with a flowmeter and a valve.
Further, the mixing and stirring devices are provided with a plurality of same devices; the powder mixing and stirring device is characterized by further comprising a reversing module, wherein the reversing module is provided with a feeding hole and a plurality of discharging holes, the feeding hole of the reversing module is connected with the discharging holes of the powder weighing device, and the discharging holes of the reversing module are respectively connected with the feeding hole of a mixing and stirring device through sealed pipelines.
Specifically, the reversing module comprises a shell, wherein the shell is in a regular frustum pyramid shape with a big bottom at the upper part and a small bottom at the lower part, and the axis of the regular frustum pyramid is vertical to the horizontal plane; the top surface of the shell is provided with a feed inlet; the same discharge ports are formed in each side wall of the shell, and the bottom edges of the discharge ports are overlapped with the bottom edges of the side walls of the shell;
the discharge port is connected with a door capable of being opened and closed. The door on the discharge hole is a pull door and can also be a revolving door.
The discharge port of the grinding device is not higher than the feed port of the screening device, and the sealing pipeline between the grinding device and the screening device is a tubular spiral feeder.
The discharge hole of the grinding device is higher than the feed inlet of the screening device, and a sealed pipeline between the grinding device and the screening device is a sealed chute.
After the cement test block is adopted, the whole process of the cement powder is in a closed environment, and sampling is carried out until the mixing and stirring device is used for preparing slurry, so as to prepare the cement test block.
The utility model can also incorporate a plurality of mixing and stirring devices, such as one or more cement paste mixers, cement mortar mixers. The stirring device is low in price, and the experiment efficiency can be improved by adopting low cost.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic structural view of the position of a feed port of the mixing and stirring device;
FIG. 3 is a schematic diagram of the spray nozzle, high pressure water pipe and abrasive addition tank;
FIG. 4 is a schematic structural view of the diverter module (pull door, in section);
FIG. 5 is a schematic right perspective view of FIG. 4;
in the figure: grinding device 1, screening plant 2, powder weighing device 3, mixing stirring device 4, tubular screw feeder 5, sealed pipeline 6, spraying nozzle 7, high pressure water pipe 8, grinding aid adds jar 9, switching-over module 10, pull door 11, gate slot 12, laboratory 13, flowmeter 14, valve 15.
Detailed Description
The present invention will be described with reference to the accompanying drawings and embodiments.
Referring to fig. 1, a cement grinding aid small grinding test device comprises a grinding device 1, a screening device 2, a powder weighing device 3 and a mixing and stirring device 4.
The discharge hole of the grinding device 1 is connected with the feed hole of the screening device 2 through a sealed pipeline; the working space of the screening device is closed; the discharge hole of the screening device 2 is connected with the feed inlet of the powder weighing device 3; the feed inlet of the mixing and stirring device 4 is positioned below the discharge outlet of the powder weighing device 3, and the discharge outlet of the powder weighing device 3 is connected with the feed inlet of the mixing and stirring device 4 through a sealed pipeline 6;
referring to fig. 2 and 3, a spray nozzle 7 is installed on the inner wall of the feed inlet of the mixing and stirring device 4, the spray nozzle 7 is connected to a high-pressure water pipe 8 outside the mixing and stirring device 4 through a pipeline, and the high-pressure water pipe 8 is further connected to a grinding aid adding tank 9 through a tee.
Referring to fig. 1, a cement grinding aid small grinding test device comprises a grinding device 1, a screening device 2, a powder weighing device 3 and a mixing and stirring device 4; the screening device and the mixing and stirring device are positioned in the laboratory 13, and the grinding device is positioned outside the laboratory 13;
the discharge hole of the grinding device 1 is connected with the feed hole of the screening device 2 through a sealed pipeline, and the sealed pipeline penetrates through the wall of a laboratory; the working space of the screening device is closed; the discharge hole of the screening device 2 is connected with the feed inlet of a powder weighing device 3; the feed inlet of the mixing and stirring device 4 is positioned below the discharge outlet of the powder weighing device 3, and the discharge outlet of the powder weighing device 3 is connected with the feed inlet of the mixing and stirring device 4 through a sealed pipeline 6;
referring to fig. 2 and 3, a spray nozzle 5 is installed on the inner wall of a feed inlet of a mixing and stirring device 4, the spray nozzle 5 is connected with a high-pressure water pipe 8 outside the mixing and stirring device 4 through a pipeline, a grinding aid adding tank 9 is also connected in series on the high-pressure water pipe, and an adding port which can be opened and closed is arranged on the grinding aid adding tank; a flow meter 14 and a valve 15 are connected to the high-pressure water pipe.
In the implementation:
the grinding device can adopt a closed ball mill, a cement test small ball mill with phi of 500 multiplied by 500 mm;
the mixing and stirring device is a cement paste mixer and a cement mortar mixer according to different experiments, and the selectable models are NJ-160 and JJ-5 respectively. When the improved extension pipe is used, the improved extension pipe is reformed, a vertical extension pipe is additionally arranged at the position of a standard feeding port, and a spray nozzle is arranged on the side wall of the extension pipe.
The screening device adopts a vibrating screen or a cement fineness negative pressure screen analyzer.
The sealed pipeline can be made of galvanized steel sheets.
The flow meter and the valve on the high-pressure water pipe can be manually observed to operate the valve, and can also be an electronic flow meter and an electric control valve, the electric signal of the electronic flow meter is fed back to the controller, and then the controller controls the on-off of the electric control valve.
The grinding aid adds the jar and is the pipeline that the both ends set up import and export respectively, and the pipeline lateral wall is opened has the interpolation mouth that can switch. The grinding aid addition tank is connected in series to the high pressure water line and is located at a position between the flow meter/valve and the spray nozzle. And because the addition amount of the grinding aid is very small, the grinding aid is firstly injected into a grinding aid addition tank through an addition port, the addition port is closed, a valve is opened, water is injected into the mixing and stirring device, and the grinding aid is completely flushed into the mixing and stirring device through the water.
The mouth sprays on mixing stirring device's feed inlet inner wall, and high-pressure rivers are filled in the feed inlet position through the water smoke that the mouth formed that sprays, and when cement powder got into the feed inlet, the raise dust was avoided to water droplet parcel cement powder granule. The spraying openings can be symmetrically arranged and are connected with the same high-pressure water pipe.
The mixing and stirring apparatuses in this embodiment are the same in number in order to efficiently perform the stirring step. The powder material mixing device is characterized by further comprising a reversing module 10, wherein the reversing module 10 is provided with a feeding hole and a plurality of discharging holes, the feeding hole of the reversing module 10 is connected with the discharging holes of the powder material weighing device 3, and the discharging holes of the reversing module 10 are respectively connected with the feeding hole of a mixing and stirring device through sealed pipelines.
And conveying the weighed cement powder to a specified mixing and stirring device through a reversing module. For the cement mortar mixer, standard sand is added in advance, and then cement powder is added after a material channel is closed.
Referring to fig. 4 and 5, the reversing module of the present example has a simple and practical structure, and includes a housing, wherein the housing is in the shape of a regular prism table with a big bottom at the upper part and a small bottom at the lower part, and the axis of the regular prism table is perpendicular to the horizontal plane; the shell is made of galvanized steel sheets through welding. In this example, the housing is in the shape of a quadrangular frustum.
The top surface of the shell is provided with a feed inlet; the same discharge ports are formed in each side wall of the shell, and the bottom edges of the discharge ports are overlapped with the bottom edges of the side walls of the shell; the discharge port is connected with a door capable of being opened and closed.
The end part of the sealed pipeline can be processed into a bent edge, and the bent edge is directly fastened on the corresponding side wall of the reversing module through a triangular self-tapping screw, and is similar to a flange connecting structure. In engineering, attention needs to be paid to a gasket between the bent edge and the outer wall of the shell. Meanwhile, the working space of the door of the feed outlet is reserved.
The door on the discharge hole is a pull door or a revolving door.
The structure of the sliding door 11 is: be connected with two door slots 12 that correspond on the outer wall of discharge gate position, pull door 11 inlays in door slot 12, and the pull realizes opening the door that makes progress. Under this structure, the limit of bending on the last edge of sealed pipeline will be got rid of, leaves the pull gap of door. Meanwhile, the dustproof brush strip is connected to the drawing gap.
The structure of revolving door does: the outer wall of the side edge of the discharge port is connected with a door shaft, and the rotating door is arranged on the door shaft; the door shaft is connected with an L-shaped crank. Under this structure, the edge of the last edge of sealed pipeline will leave the breach that supplies the crank pole to pass through.
From the practical perspective, the pull door is more convenient to maintain, and the leakproofness of pull structure is better.
According to the situation of an experimental site, if the discharge hole of the grinding device is not higher than the feed hole of the screening device, the sealed pipeline between the grinding device and the screening device is a tubular spiral feeder 5 (auger). The material needs to be conveyed through a spiral feeder.
If the experimental site is large, such as the height of a standard factory building, the grinding device can be placed on the high platform, and the screening device is slightly lower. The discharge hole of the grinding device is higher than the feed inlet of the screening device, and a sealed pipeline between the grinding device and the screening device is a sealed chute. The material is conveyed by the gravity of the material.
The powder weighing device in the prior art adopts the principle that a weighing sensor is connected to the outer wall of a powder container to weigh powder in the container. And under the weighing state, the outlet of the powder container is closed, the inlet is opened, and when the preset weight is reached, the inlet is closed and the outlet is opened. The process can be manually operated or assisted by an automatic system.
The experiment using the experimental apparatus is described as follows:
first, preparation work
1. The loss of each ball forging in the ball mill is periodically checked, and weighing and checking are carried out for complement. Typically, the inspection cycle is calibrated to time or grind count.
2. Crushing large particles (such as stones and coal gangue) contained in the cement ingredients by a crusher.
3. The cement batch was weighed to a standard of 5000 grams per group.
4. For the addition of grinding aid in the ball mill, grinding aid was prepared according to the dosing of the experimental protocol. The general mixing amount of the grinding aid is as follows: 0.1%, 0.05%, 0.03%.
5. The screening device used by the cement dry screen is a vibrating screen, and the screen is assembled according to the surplus sieve with the standard grain size of 0.08 mm. It can also be used in a cement fineness negative pressure screen analyzer.
6. And preparing a cement sample reserving barrel.
Second, grinding process
1. The ball mill was idle washed and milled prior to addition of the batch.
2. And (5) checking the condition in the mill and recording the temperature in the mill.
After cement ingredients are put into a mill, the cement grinding aid is dripped into a measuring cylinder by a test tube according to the selected mixing amount for weighing and metering, then the cement grinding aid in the measuring cylinder is poured onto the cement ingredients in a feeding port of the mill, and the uniform grinding time is set.
3. After the grinding time is over, the finished cement is discharged from the mill and sieved, is distributed to a required mixing and stirring device (in the experimental mode, grinding aid is added into a grinding aid adding tank on the mixing and stirring device, and is added into a grinding aid adding tank), and is filled into a sample reserving barrel after the stirring is finished.
Third, maintenance process
Physical experiments were performed with finished cement in the sample barrel.
And placing the formed cement sample into a standard curing water tank for constant-temperature and constant-humidity curing.
Claims (6)
1. A cement grinding aid small grinding test device comprises a grinding device, a screening device and a mixing and stirring device, and is characterized in that the screening device and the mixing and stirring device are located in a laboratory, and the grinding device is located outside the laboratory;
the discharge port of the grinding device is connected with the feed port of the screening device through a sealed pipeline, and the sealed pipeline penetrates through the wall of the laboratory; the working space of the screening device is closed; the discharge hole of the screening device is connected with the feed inlet of a powder weighing device; the feed inlet of the mixing and stirring device is positioned below the discharge outlet of the powder weighing device, and the discharge outlet of the powder weighing device is connected with the feed inlet of the mixing and stirring device through a sealed pipeline;
a spraying nozzle is arranged on the inner wall of a feed inlet of the mixing and stirring device, the spraying nozzle is connected with a high-pressure water pipe outside the mixing and stirring device through a pipeline, a grinding aid adding tank is also connected in series on the high-pressure water pipe, and an openable adding port is arranged on the grinding aid adding tank; the high-pressure water pipe is connected with a flowmeter and a valve.
2. The cement grinding aid small grinding test device according to claim 1, wherein the mixing and stirring devices are a plurality of the same; the powder mixing and stirring device is characterized by further comprising a reversing module, wherein the reversing module is provided with a feeding hole and a plurality of discharging holes, the feeding hole of the reversing module is connected with the discharging holes of the powder weighing device, and the discharging holes of the reversing module are respectively connected with the feeding hole of a mixing and stirring device through sealed pipelines.
3. The cement grinding aid small grinding test device as set forth in claim 2, wherein the reversing module comprises a housing, the housing is in the shape of a regular frustum of a pyramid with a big bottom at the upper part and a small bottom at the lower part, and the axis of the regular frustum of a pyramid is perpendicular to the horizontal plane; the top surface of the shell is provided with a feed inlet; the same discharge ports are formed in each side wall of the shell, and the bottom edges of the discharge ports are overlapped with the bottom edges of the side walls of the shell;
the discharge port is connected with a door capable of being opened and closed.
4. The cement grinding aid small grinding test device as set forth in claim 3, wherein the door on the discharge port is a sliding door.
5. The cement grinding aid small mill test device as set forth in claim 1, wherein the discharge port of the grinding device is not higher than the feed port of the screening device, and the sealed pipe therebetween is a tubular screw feeder.
6. The cement grinding aid small mill test device as set forth in claim 1, wherein the discharge port of the grinding device is positioned higher than the feed port of the screening device, and the sealed conduit therebetween is a sealed chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121972642.XU CN215953613U (en) | 2021-08-22 | 2021-08-22 | Small grinding test device for cement grinding aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121972642.XU CN215953613U (en) | 2021-08-22 | 2021-08-22 | Small grinding test device for cement grinding aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215953613U true CN215953613U (en) | 2022-03-04 |
Family
ID=80433117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121972642.XU Active CN215953613U (en) | 2021-08-22 | 2021-08-22 | Small grinding test device for cement grinding aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215953613U (en) |
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2021
- 2021-08-22 CN CN202121972642.XU patent/CN215953613U/en active Active
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