JPS6345850B2 - - Google Patents

Description

[Detailed description of the invention] The present invention is based on original patent No. 1389070 (Special Publication No. 1389070).
57050), the moisture adhering to fine grain materials such as sand and sludge can be adjusted to a suitable range in a smooth and highly efficient manner under conditions that are not disturbed by wind power, etc. The purpose is to provide an adjustment device that can be recovered at a yield.

River sand or similar fine-grained materials are so-called fine aggregates and are indispensable materials for various types of construction or civil engineering that use cement today.Of course, they have been commonly used since ancient times, and In some cases, sea sand, water slag, or sludge are being used as substitutes. However, such fine grain materials have adhering moisture, and this adhering moisture value usually varies over a wide range. In other words, the source of such river sand is outdoors, such as a riverbed, and even if it is collected and deposited in a yard, there is hardly any special roofing, so it is difficult to collect or deposit it in a yard. Due to both transportation and storage conditions, there is an extremely high possibility that it will come into contact with river water or rain and dew.On the other hand, because of the fine grain size of sand, it has an extremely large specific surface area, and it is inevitable that it will contain water that adheres to the surface. Moreover, since water is retained in the spaces between these particles, the adhering water is always present, and moreover, it constantly changes depending on the weather conditions. A similar phenomenon is observed in the sea sand, water slag sand, etc. mentioned above, and in these cases, there is a high possibility that foreign components are mixed in due to the sampling conditions, etc., and this is due to the above-mentioned river sand. Even in such cases, clay and other mud particles are deposited, and these substances cause various problems when used as described above. On the other hand, when preparing a cement mixture using such sand, the water-cement ratio (hereinafter referred to as W/C
), cement-sand ratio (hereinafter referred to as C/S),
Or, in the case of making concrete, the mixing ratio of coarse aggregate G such as gravel (hereinafter referred to as S/G or C/G) to one or both of cement and sand will affect the strength and flow of the resulting compact. It is clear that it has a significant effect on the properties (formability, workability), and in any case, excessive water content causes separation and breathing, and is a major cause of a decrease in strength. Insufficient water content during the reaction impairs moldability and injectability, and even with auxiliary treatments such as continuous vibration and compression, it is not possible to form a dense structure, which also causes a decrease in strength and other product defects. Invite. Therefore, although it is essential to properly determine the W/C as described above in order to obtain a desirable product, achieve smooth injection molding, and obtain effective spraying, it is essential to determine the sand used for it. The fact that the amount of water deposited in the water fluctuates as described above and it is impossible to accurately grasp and manage it means that in fact, it is impossible to properly determine the relationship described above, and only W/C can do so. The S/C is also unstable, and as a result, desirable strength and molding work cannot be achieved. Of course, there are methods to measure the weight of this sand, such as drying it to an absolute dry state or measuring it in water, but this method is practically impossible to use when a large amount of sand is required, and the former method requires a large amount of heat. Energy and time are consumed, and the latter also requires man-hours to completely penetrate water into the sand grains and release air (according to JIS, 24-hour immersion is required) and then to drain the water contained. It bulks up significantly.

As mentioned above, it is natural that the adhesion and contamination of foreign components will change the performance of the product.In particular, salt adhering to sea sand can lead to corrosion of reinforcing steel, so it is strictly regulated, and JIS etc. Although salt removal methods are prescribed, a large amount of clean water is consumed in washing sea sand for such salt removal, its handling is complicated, and of course, difficult treatment is required for dehydration after salt removal washing. shall be.

In order to dehydrate the surface of such granular materials, Japanese Patent Laid-Open Publication No. 1983-1989 discloses that the granular materials are dispersed using wind power, and the water is dehydrated by the impact force of the scattered granular materials.
This is proposed in No. 54358, but it is clear that this would require a fairly strong wind force, and it is natural that this wind flow would flow turbulently within the casing of the equipment and blow out around the equipment. The force ejected from the typhoon alone is as strong as a typhoon, or even stronger. In other words, if it were carried out inside a factory, the inside of the factory would be blown up like a typhoon, and even if it was carried out outdoors, it would blow away the surrounding earth and sand, making it difficult for workers to get close to the equipment. A strong pressure airflow is generated, and the behavior of the granular material after the impact is reversed is also disturbed. Especially in the case of sand grains, the sand grains are blown out of the case by the airflow from the case, which greatly disrupts the processing results and makes the work itself unstable. It has to be stable.

The present inventors have proposed the above-mentioned original patent No. 1389070 (hereinafter referred to as the original invention) to disperse fine aggregate such as sand using centrifugal force without using wind power or the like, and to disperse this material. We invented a method in which flying particles collide with the board surface, the impact force at the time of the collision causes adhering moisture to be transferred to the impact board surface, and fine aggregate is reversely dropped from the board surface to adjust the adhering moisture. Even if it is not possible to completely remove water from the particles during a particle impact, the behavior of the particles is less likely to be disturbed by air currents inside the case, etc., and the amount of water remaining on the particles is generally determined by the flight speed mentioned above. Since it is inversely proportional to the centrifugal force, it has also been proposed that by appropriately selecting the degree of centrifugal force, the amount of water attached to the sand grains falling from the impact plate can be made approximately constant. A certain amount of fine grain material is lost, and even when considering the direction of flight, it tends to be difficult to obtain a sufficient yield of some fine grain materials.

The present invention was devised after further study in view of the above circumstances, and in accordance with the technical method of the original invention, a dividing means is provided on the impact wall surface,
By separating the fine grain material moving along the wall surface from the wall surface, a favorable improvement in yield can be achieved.

An example of the apparatus of the present invention as described above is as shown in the attached drawing, in which a rotating disk 2 serving as a centrifugal force imparting means is located below a fine grain material supplying means 1 such as a hopper.
In other words, the charging port 11 from the hopper 1 faces the center of the rotating disk 2, and the dispersing piece 7 is arranged on the peripheral side thereof. is connected to a shaft cylinder 12 rotatably provided outside the charging port of the supply means 1, and the shaft cylinder 12 is connected to a fixed cylinder 13.
A belt 14 is suspended between the pulley 15 attached to the upper part of the shaft cylinder 12 and the pulley 5 of the motor 4, and the pulley 15 rotates at a required speed. It is designed to be done. However, on the circumferential side of the rotating disk 2 as described above, an annular collision plate 6 serving as a collision part is arranged at an appropriate distance.
are provided in the casing 10 so that they can be attached to and removed from the bell-shaped guiding body 9 that extends downward, and the lower part of the guiding body 9 is provided with dividing means 8, 8a,
8b are arranged in a ring in multiple stages, and the lowermost dividing means 8b is configured to substantially seal the lower area of the guide member 9 together with the casing 10, and the connecting plate 18 is connected to the dividing means 8b. As shown in the figure, the other dividing means 8a, 8 are arranged in stages.

As shown in the figure, the upper end of each of the dividing means 8 to 8b is formed into a knife shape, and this portion is opposed to the inner surface of the guide member 9 with a gap that is at least large enough to allow liquid and air to pass through. and the guide member 9
The fine grain material moving along the surface is separated from the wall surface.

In some cases, an annular rotating plate 2a with its peripheral side bent slightly downward may be attached to the outer periphery of the rotating disk 2 as described above, as shown in the virtual image. In this case, the sand grains are scattered downward to some extent, and the setting position of the collision plate 6 is lower, but even if the dispersion piece 7 is not specially installed, the sand grains spread on the two surfaces of the disk can be scattered. When the sand particles scatter and separate, an effective centrifugal force can be applied in combination with the frictional action of the sand grains in the downward bending region. However, in such a case, each sorting means 8
By making the distance between .about.8b and the surface of the guide member 9 smaller than that shown in the figure, the sand grains can be preferably separated, and the same effect as described above can be achieved.
A belt conveyor or the like is installed in front of the hopper 1 to continuously feed sand grains.

Furthermore, if preferred operating conditions are adopted for the above-mentioned device as in the embodiment described later, what is discharged along the guiding part 9 surface in the above-mentioned device will be water and substantial mud. It may be released as is.

However, such favorable operating conditions may not always be obtained depending on the properties of the applied sand grains, etc. In such cases, the material that has fallen from the lower end of the guiding member 9 to the outside of the separating means 8b may be appropriately removed. Of course, it is possible to carry out sedimentation separation or other treatment to separate the fine granules, and charge them into the hopper 1 using a conveyor or the like for reprocessing. In addition, the moisture removed from the fine granule material by the treatment of the present invention can be recovered and used as appropriate without simply discharging it. Used for concrete mixing.

A concrete device that takes these relationships into consideration is as shown in FIG. In addition, the lower part of the sorting means 8b is constricted as shown in the figure, and the discharge belt conveyor 20 is connected to this.
is disposed, and the conditioned sand is always carried out by the conveyor 20 in a state in which it is slightly accumulated at the throttle opening 20a, so that the inside of this sorting means 8a is substantially sealed, and the receiving gutter 19 A discharge port 19a is provided at the lower inclined portion of the drain tank 19 so that water removed from the fine granule material is allowed to fall into a hopper-shaped receiver 17 provided in a drainage tank 18. Furthermore, a scraping piece 21 is provided at the bottom of such a receiver 17.
A scraping conveyor 21, such as a so-called water conveyor, is provided to scrape up the solid matter that has settled at the bottom of the receiver 17 to the outside of the drain tank 18. A water pipe 22 having a port 23 is provided, and is adapted to lift water by a necessary water pumping mechanism (not shown) and send it to a mixer section for mixing mortar or concrete as described above, and is adapted to send water to the mixing machine section for kneading mortar or concrete as described above. A water supply pipe 25 having a water level detection mechanism 24 is provided on one side of the drain tank 18 so as to keep the water level of the drain tank 18 constant at all times. Water pipe 22 mentioned above
In some cases, it may be guided to the receiving gutter 19 part and the receiving gutter 1
It can be used for the purpose of injecting water to clean the inside of the hopper 9, or for pre-adding water to the fine granule material that is guided to the base of the conveyor 30 and fed into the hopper 1. That is, the present invention ultimately uses impact force to remove water adhering to the surface of fine granular material, and it seems pointless to add water to the water to be removed in advance. In some cases, the fine grain material may be in a tumbled state that does not reach the moisture content adjusted for removal, and in this case, the moisture content will not be uniform even if the removal adjustment treatment is carried out. In addition, it is inevitable that each fine grain material contains a certain amount of mud, and since this mud has viscosity, there is a possibility that it will stick to the 6 surfaces of the impact plate.Especially, the moisture value of the fine grain material to be treated is low. In such cases, it is very important to increase the moisture content of the fine grain material to be treated in advance.In other words, water that is removed from the fine grain material and flows down the wall surface can cause damage to the six surfaces of the collision plate, etc. It also allows mud and other particles that tend to adhere to the surface to flow down.

Furthermore, if there is a high possibility that mud or the like will adhere to the collision plate 6, the motor 4a installed above the hopper 1 will be moved as shown in the embodiment in FIG.
A vertical shaft 27 driven by the vertical shaft 27 is suspended down to the collision plate 6 portion, and a cleaning piece 28 is arranged on the vertical shaft 27, and the collision plate 6 portion is rotated slowly (for example, 10 times or less per minute) of the vertical shaft 27. It is possible to perform scraping cleaning. If a highly sticky mud adhesion layer is formed on the 6th surface of the collision plate, it will act as a buffer layer and impair the adjustment effect that utilizes the impact energy. There is a high possibility that the fine-grained material itself will be adhered to the adhesion layer due to mud etc., and the impact will not be reversed. By appropriately performing cleaning with the piece 28, moisture adjustment processing can be effectively carried out without these disadvantages.

Incidentally, a screw 29 is provided on the vertical shaft 27 as described above, if necessary, so that the fine grain material from the hopper 1 is constantly supplied onto the rotating disk 2. That is, it is clear that extreme fluctuations in the amount of fine grain material supplied to the rotating disk 2 are not preferable in terms of achieving constant moisture control, and it is not desirable to have the rotating disk 2 driven by a motor 4a separate from the rotating disk 2. By aiming at the steady supply, favorable supply and operation can be obtained.

A specific example of adjustment according to the present invention using the above-mentioned apparatus will be described below.

Adjustment example 1 Using the equipment shown in the drawing above, the water-containing Megawa sand produced in Kimitsu, Chiba Prefecture, which varies in the range of 4% to 25% of the amount of attached water (water absorption rate 2.25%, coarse grain rate 3.27)
%), a rotating disk 2 with a diameter of 450 mm is used, and the rotating disk 2 is rotated by the motor 4 at a speed of 1250 revolutions per minute, and the supplied sand grains are struck against the collision plate 6. caused a collision. The sand grain supply rate to hopper 1 is 25 m ² /hr as water-containing sand.
5 to 40/ on the conveyor feeding into hopper 1
Water was supplied to the separating means 8 under the rotational conditions of the rotating disk 2 as described above.
While ensuring that the sand deposited in the lower part of b is sealed by the deposited sand, the sand carried out by the conveyor is sampled every minute and the water content is measured.The results are 8.79 ~
It is within the range of 8.93%, and the amount of attached water is 6.54 ~
It was confirmed that the recovery rate was 6.58%, which was almost completely constant, and the recovered amount was 24.1 m ² /hr, and the yield reached 96.2%, and the reduced amount was recognized to be essentially mud.

Furthermore, under the same conditions as above, when the rotational speed of the rotating disk 2 was set to 1500 revolutions per minute, which was higher than in the above case, the moisture content measurement results for the sampling of sand carried out were 6.92 to 7.04% (the amount of water deposited).
4.66~4.77%), and the rotation speed is further increased to 1750%.
times/min, the water content is 5.79 to 5.88% (the amount of attached water is 3.53 to 3.62%), and in each case, the amount of attached water is lower, and the variation area is constant within a narrower range. It was confirmed that the recovery amount was 24.28m ² /hr at 1500rpm,
At 1750 rpm, it was 24.52 m ³ /hr.

Adjustment Example 2 Using the same equipment as in Adjustment Example 1 above, medium-sized sea sand produced in Hiroshima Prefecture (water absorption rate 2.46%, coarse grain rate 2.62%,
with a salt content of 0.33%) and in this case 30% per minute on the conveyor to the hopper.
of water was added for treatment.

That is, at this time, under the rotation conditions of the rotating disk 2 shown in the previous section of the above example, the water content of the obtained sampling was 8.56 to 8.71% (the amount of water landed).
6.40 to 6.55%), and even under the same rotation conditions, the amount of water deposited is low because it is medium-sized sand, and its salt content is 0.03%, so it can be used as it is for preparing fresh mortar or ready-mixed concrete. It was confirmed that the amount recovered was 23.8 m ³ /hr.

Similarly, the measured value of sampled water under the latter rotation conditions of Example 1 was 6.76 to 6.76 at 1500 rpm.
6.83% (accompanying water landing amount 4.30-4.37%),
5.51~5.58% at 1750 rpm (attached water amount 3.05~
3.12%), and similar results were obtained with little variation, and the salt content in these cases was 0.028% and 0.027%, which of course could be used for concrete as is. .

In this case, in order to perform washing to remove the salt with fresh water according to the conventional salt removal treatment technology, it is necessary to perform a washing operation with at least the same amount of fresh water as the volume of the sea sand to be treated, as described above. To process 25 m ³ of sea sand corresponding to the adjustment example, 25-80 m ³ of fresh water is consumed. On the other hand, in the case of the present invention described above, the required water amount is only 1.8 m ³ /hr, which is 30×60 (minutes), and the amount of fresh water consumed is significantly reduced.

Moreover, the conventional salt removal treatment described above uses sprinklers or simple watering, and the salt removal effect varies considerably, for example, the average value is 0.03%.
Specifically, for example, it is 0.002 to 0.150%, and 0.04% is considered to be an industrially preferable range.
Although a considerable amount of substances that do not meet the following requirements are mixed in, in the case of the above adjustment example of the present invention, water is added evenly on the conveyor and impact separation is performed evenly and accurately, so it is 0.007 to 0.038%. It has been found that the range of variation is small, which is preferable from this point of view as well.

Preparation Example 3 Crushed water slag slag sand having a coarse grain ratio of 2.53% and a water absorption rate of 2.90% was treated in the same manner as described in Preparation Example 1.

In other words, at 1250 rpm, the water content of sampling conducted every minute is 8.99 to 9.27% (6.09 to 6.37% of attached water).
At 1750rpm, the water content is 6.19~6.28%
(4.29 to 4.38% of attached water), and the amount of recovered water is 24.0 m ³ at 1250 rpm and 24.0 m 3 at 1500 rpm.
24.3m ³ , and 24.51m ³ at 1750 rpm.

Specific examples of how to use the moisture regulating material as described above are as follows.

Application example 1 To adjust cement mortar according to the conventional general method, we used near-dry Nakamegawa sand from Kimitsu, Chiba Prefecture, the cement was 956Kg/ ^m3 , and the W/C was C:S=1: ^1cm2 . 35%, lignin sulfonic acid dispersant
The product kneaded at a ratio of 7.65Kg/m ³ was found to have considerable air bubbles, and the fluidity of this product was
42 seconds, the breathing rate was 6% after 3 hours, and the compressive strength of the molded product made from this mortar after 3 days was 375 Kg/cm ² , 489 Kg/cm ² after 7 days, and 563 Kg/cm ² after 28 days. It was hot. The coefficient of variation after 28 days is 15.3%.

On the other hand, when the same medium-sized sand as above was subjected to the water adjustment treatment according to the present invention and the rotating disk was rotated at 1750 rpm as described in Adjustment Example 1, the water adhering to the surface was 3.53%. However, the same amount of cement, C/s and W/ as mentioned above
The fluidity of the mortar prepared by adding and mixing the remaining water (subtracting the amount of water adhering to the surface above) and a dispersant so as to satisfy the relationship C is 13 sec in a J-funnel, and the freezing rate after 3 hours is 0.5%. Ta. The compressive strength of the product molded with such mortar after 3 days is
532Kg/cm ² , 698Kg/cm ² after 7 days, 790 after 28 days
Kg/cm ² and its coefficient of variation was 4.8%.

Furthermore, the moisture content of the above-mentioned medium-sized sand was adjusted using a rotating disk at a rotation speed of 1750 rpm, and 16.47% of primary water was evenly added to and mixed with 3.53% of water adhering to the surface, and then cement was added to C/s = 1. : 1 to form a shell with a W/C of 20% on the surface of the sand grains, and then 15% secondary water and 0.8% dispersant were added and kneaded. Liquidity is 19sec
And the pleating rate during that 3 hours was zero. However, the compressive strength of the product formed with such mortar after 3 days was 619 Kg/cm ² and after 7 days it was 739
Kg/cm ² , after 28 days it was 855Kg/cm ² and the coefficient of variation was 2.2%.Compared to the conventional general method mentioned above, a significant increase in strength was obtained despite the same formulation, and a stable I was able to confirm the quality.

Usage example 2 Using the same Kimitsu-produced medium sand as in usage example 1 using the conventional general method, cement was added at 347Kg/m ² and C/
S=1:2, C/G=1:3.6, dispersant 3.5Kg/
The slump value of the concrete mixed at a ratio of m ³ and with a W/C of 42% was 2.1 cm, and considerable breathing and air bubbles were visually confirmed in this concrete.

However, the compressive strength of the molded product obtained with this concrete was 208 Kg/cm ² after 3 days, and 284 Kg/cm 2 after 7 days.
cm ² was 334 Kg/cm ² after 28 days, and its coefficient of variation was 17.4%.

On the other hand, the slump value of concrete that was mixed and adjusted with the same mixing ratio and composition as described above using the same medium-sized sand that was subjected to the adjustment treatment to make the amount of water adhering to the surface 3.53% in Application Example 1 was 8.2 cm.
Although some separation and breathing were observed, the compressive strength of the compact obtained with such concrete was 274 Kg/cm 2 after 3 days and 348 Kg/cm ² after 7 days.
cm ² was 482 Kg/cm ² after 28 days, and its coefficient of variation was 8.2%, indicating that an increase in strength of nearly 50% was obtained and the range of variation was relatively small.

Furthermore, 6.47% primary water was added and mixed to the same 3.53% surface adhesion water adjusted river sand as above, and then the amount of cement was added to the same amount as above, and the W/
Shelling sand containing 20% C was obtained, and this was mixed with gravel, 22% secondary water, and a dispersant at a ratio of 1% of the amount of cement to obtain concrete having the same composition as described above. However, the slump value of this concrete is 11.6 cm, and the compressive strength after 3 days of a molded body made of this concrete is 308 Kg/cm ² , 7
382Kg/cm ² after 28 days, 513Kg/cm ² after 28 days,
In addition, the coefficient of variation was 5.1%, and the strength was increased by about 50%, and stable concrete with a small variation range could be obtained.

Application example 3 Concrete with the same composition as in application example 2 with an additional 1.5% steel fiber added by bulk ratio was adjusted and kneaded using a conventional conventional method, and the slump value was
It was visually confirmed that the concrete had a diameter of 1.5 cm and had large separation and breathing.
The bending strength after 28 days was 58 Kg/cm ² .

On the other hand, the slump value of concrete made with sand with water content adjusted according to the present invention and steel fibers in the same manner was 7.4 cm, and some separation and breathing were observed, but after 28 days of molding of this concrete. The bending strength was 75Kg/ ^cm2 .

Furthermore, after adjusting the water content as described above, a shell was formed with a W/C of 20% relative to the sand grains, and in steel fiber-containing concrete prepared using this shell and having the same composition as above, the slump value was 12.8cm
No separation or breathing was observed, and the bending strength of the molded product after 28 days was 92 kg/cm ² .

Usage example 4 Using the same river sand as in usage examples 1 to 3 above, spraying cement at 350Kg/m ³ and sand at 1120Kg/m3.
Kg/m ³ , coarse aggregate 700Kg/m ³ , quick setting agent 10.5Kg/
m ³ is mixed under dry conditions and pumped with high pressure air, water is added to the dry pumped material so that the W/C is 50% at the spray nozzle part, ), the rebound amount was approximately 35% and the amount of dust generated inside the tunnel was approximately 750 CPM. The compressive strength of the pipework after 28 days is 232Kg/ ^cm2 , and its coefficient of variation is
It was 14.5%.

On the other hand, example 1 of using the same river sand as above.
When using river sand with the surface adhesion water adjusted to 3.53% in the same way as in ~3, the rebound amount was 18% under the same composition and spraying conditions, and the amount of dust generated was 340CPM, and the spraying 28 of engineering
Compressive strength after 363Kg/cm ² and its coefficient of variation is 5.3%
It was hot.

Furthermore, using river sand with a surface adhesion rate of 3.53%, a shell with a W/C of 20% was formed in the river sand to obtain a mortar with a C/s of 1:1. Then, a mortar with good fluidity adjusted to W/C = 34.2% and a dispersant of 0.6% (based on the amount of cement) is pumped through one pipe, and the other pipe is sprayed with C/s. Sand and coarse aggregate, whose moisture content was adjusted to 3.53% in the same manner as above, were pumped under dry conditions so that S/A (A is coarse aggregate) was 56%. A quick-setting agent or the like was mixed at the nozzle at a ratio of 1 part delivered from one pipe to 1.75 parts pumped from the other pipe, and the mixture was sprayed onto a vertical wall. The W/C in this shotcrete is 42% and the amount of cement is 352Kg/m ³
The rebound amount during spraying is 8.9%,
The amount of dust generated is 72 CPM, the compressive strength after 28 days of spraying is 542 Kg/cm ² , and the coefficient of variation is 3.2%, which is more than twice the strength of conventional general methods and one-fifth of the coefficient of variation. We were able to carry out preferable spraying work that was limited to nearby areas.

According to the present invention as explained above, it is possible to effectively control the adhering moisture of sand and other fine-grained materials under conditions where there is little interference from wind force or other forces, thereby making it possible to effectively control the adhering moisture of sand and other fine-grained materials. For fine-grained materials such as sand whose compounding ratio could not be determined practically, we always obtain a favorable compounding relationship, and the product strength is the highest under each compounding ratio condition, and the product is of stable quality with a small range of variation. Moreover, even if such a process is mass-produced, the amount of loss during the process is small, and the adjustment process that is industrially advantageous can be carried out smoothly. This invention has great industrial effects.

Additional Relationship The present invention is disclosed in original patent No. 1389070 (Japanese Patent Publication No. 61-57050).
In other words, fine-grained materials such as sand with attached water are scattered, the scattered fine-grained materials are caused to collide with a wall surface, and the impact force at the time of the collision removes the moisture attached to the surface of the fine-grained materials. The method of detachment is similar to the original invention, but in the present invention, a partitioning means attached to a wall surface continuous with the colliding wall surface with a required gap is used to approximately disengage from the wall surface. By separating the moving fine-grained material from the wall surface, the recovery rate of the fine-grained material subjected to the treatment can be effectively increased, and the fine-grained material can be recovered as fine-grained material from which mud and other impurities have been substantially separated. In addition, the above-mentioned separation means is used to separate the inside and outside of the processing chamber, and the processing is performed under substantially closed conditions, thereby appropriately increasing the pressure of the processing atmosphere and separating the fine particles as they are scattered. Since the water removal effect caused by the air flow passing through the gap between the end of the wall and the wall surface can be appropriately obtained, the adjustment efficiency can be increased and favorable adjustment results with a narrower variation range can be obtained. Therefore, by using sand whose content and adhesion amount have been precisely adjusted in this way for ready-mixed mortar or ready-mixed concrete, its W/C, S/C, and other mixing relationships can be adjusted appropriately. Since it is determined that the strength and other properties of products made from such fresh mortar or ready-mixed concrete can be fully evaluated, it is especially important to apply an appropriate amount of cement to the surface of such fine-grained materials such as sand. In cases where shelled products are used in a multi-stage process, it is possible to not only accurately obtain the amount of water required for each process, but also to reasonably obtain the amount of water necessary to ideally obtain the shelled material. This invention is an improvement on the original invention because it achieves characteristics such as being able to always achieve the intended purpose in the best possible manner.
It allows the drive energy to be adjusted smoothly, requires only compact equipment, and is extremely effective and appropriate as a management method for sand, etc., which is required in large quantities, making it suitable for industrial use. This is a highly effective invention.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention,
FIG. 1 is a sectional view showing an example of a device according to the present invention;
FIG. 2 is an explanatory diagram when a treatment system for the removed water is installed. In these drawings, 1 is a fine particle supply means, 2 is a rotating disk as a centrifugal force applying means, 3 is a bearing, 4 is a motor, 5 is a pulley, 6 is a collision plate as a collision member, and 7 is a dispersion piece. , 8, 8a, 8b are dividing means, 9 is a guide member, and 10 is a casing.

Claims (1)

[Claims] 1. It has a centrifugal force applying means and a fine aggregate supplying means for supplying fine grain material such as sand to the centrifugal force applying means, and a collision member is provided at an appropriate interval on the centrifugal force applying means. Moreover, a fine aggregate collection means is provided below the collision member, and a means for collecting fine aggregate is provided which is reversed by collision with the collision member, and a required gap is provided to the collision member, and the collision member is moved in a direction substantially parallel to the collision member body surface. 1. A moisture adjustment device for fine granule material, characterized in that it is provided with a separating means for separating the fine granule material.