JP7281820B2 - Compression hardening equipment for granulated cement - Google Patents

Description

When producing granulated cement that improves the strength and fluidity of mortar or concrete, the present invention further compresses and hardens a composite material in which cement is kneaded with oils and fats to integrate cement and oils. It relates to a compression hardening device for granulated cement to be used.

Conventionally, concrete is generally transported to the site by a ready-mixed concrete truck while water is kneaded with aggregate and cement. As a result, during the process of pumping the concrete from the ready-mixed concrete car to the pump and placing it, it frequently solidified inside the hose. So-called granulated cement is used to solve this problem.

This granulated cement has a special structure that improves the fluidity and strength of mortar or concrete and prevents the strength from decreasing after curing because the surface of each cement particle is not modified. there is A method for producing this granulated cement is described in Patent Document 1.

This method for producing granulated cement is a method for producing granulated cement as compression granules by kneading a composite material containing cement and fats and oils. That is, a step of mixing and stirring the composite material, a pulverization/crush step of the primary treatment material by the mixing and agitation step, a compression granulation step of the secondary treatment material by the pulverization/cracking step, and the compression granulation step. A manufacturing method comprising a step of firing the granulated cement manufactured in.

Then, in the compression granulation step, the mixed and stirred composite material is processed into granules by a power mill, and the granulated composite material passed through the holes of the screen is compressed by a briquetting machine to form granulated cement. It is.

Japanese Patent No. 6067656

According to the production method of Patent Document 1, when water is added to the granulated cement, the cement on the surface side undergoes a sequential hydration reaction, the granulated cement gradually collapses, and the granulated cement undergoes a sequential hydration reaction. is formed to undergo a hydration reaction.

However, in this granulated cement, a disintegrating agent or a thickening agent may be selectively added to the composite material depending on the place of use, purpose, and the like. Therefore, with granulated cement obtained by compressing a composite material with a conventional power mill or briquetting machine, it may be difficult to integrate the composite material of cement and fats and oils depending on the material. As a result, the granulated cement is likely to crumble, and there have been problems such as the sequential hydration reaction from the surface side of the granulated cement failing.

Therefore, the present invention was created to solve the above-mentioned problems, and is not only a composite material in which oils and fats are kneaded with cement, but also a composite material containing cement and oils and fats even if a disintegrating material or a thickener is added. An object of the present invention is to provide a compression hardening device for granulated cement that can reliably integrate materials.

The first means of the present invention for achieving the above object is a compression hardening apparatus for granulated cement that compresses and hardens a composite material in which cement is kneaded with oils and fats between a pair of pressure rolls 10 adjacent to each other. A large number of compressed lateral grooves 11 having a V-shaped cross section perpendicular to the longitudinal direction of the pressure roll 10 are formed on the surface of the pressure roll 10, and each surface of the pressure roll 10 has a A large number of compressed longitudinal grooves 12 having a V-shaped cross section which are parallel to each other and intersect the compressed lateral grooves 11 are formed. The thickness is 0.5 mm to 1.0 mm, the width of the opening is 1.0 mm to 2.0 mm, and the composite material is compressed to a thickness of 1.0 mm to 2.0 mm.

A second means is to alternately form compressed ridges 10A and compressed grooves 10B along the longitudinal direction of the pressure roll 10 on the surface of the pressure roll 10. 10B, a large number of compressed lateral grooves 11 having a V-shaped cross section perpendicular to the longitudinal direction of the pressure roll 10 are formed on either one or both surfaces of the pressure roll 10B, and the pressure rolls 10 facing each other are compressed ridges 10A. and the compression grooves 10B mesh with each other to compress the composite material and harden it into a plate having a thickness of 1.0 mm to 2.0 mm.

A third means is to form compressed vertical grooves 12 having a V-shaped cross section parallel to the longitudinal direction of the pressure roll 10 on either or both surfaces of the compressed ridges 10A and the compressed grooves 10B. are formed, and the compressed vertical grooves 12 are provided so as to intersect the horizontal compressed grooves 11, or only the compressed vertical grooves 12 are formed.

As in claim 1 of the present invention, the composite material is compressed and cured by a pressure roll having a large number of V-shaped cross-sectional compression lateral grooves perpendicular to the longitudinal direction of the pressure roll formed on the surface. With this configuration, even if a disintegrating agent or a thickening agent is added to a composite material containing cement and oils, the composite material can be reliably integrated. As a result, it is possible to provide granulated cement that undergoes sequential hydration reactions starting from the cement on the surface side, granulated cement that gradually collapses, and undergoes sequential hydration reactions.

On the surface of the pressure roll 10, a large number of compressed vertical grooves 12 having a V-shaped cross section that are parallel to the longitudinal direction of the pressure roll 10 and intersect with the horizontal compression grooves 11 are formed, thereby removing cement and oils. It becomes possible to compress and harden the composite material containing it more strongly.

The compressed lateral groove 11 and the compressed vertical groove 12 are formed so that the angle of the bottom is a right angle, the depth is 0.5 mm to 1.0 mm, the width of the opening is 1.0 mm to 2.0 mm, and the composite material has a thickness. Compressed to 1.0 mm to 2.0 mm, composite materials containing cement and oils can be compressed and hardened efficiently and reliably.

According to claim 2 , on the surface of each pressure roll 10, the compressed ridges 10A and the compressed grooves 10B are alternately formed along the longitudinal direction of the pressure roll 10, and the compressed ridges 10A and the compressed grooves 10B, and a large number of compressed lateral grooves 11 having a V-shaped cross section perpendicular to the longitudinal direction of the pressure roll 10 are formed on either or both surfaces of the pressure roll 10B. Compressed grooves 10B mesh with each other to compress the composite material and harden it into a plate with a thickness of 1.0 mm to 2.0 mm. can also be strongly compression hardened.

As in claim 3 , a large number of compressed vertical grooves 12 having a V-shaped cross section parallel to the longitudinal direction of the pressure roll 10 are formed on the surface of one or both of the compressed ridges 10A and the compressed grooves 10B. By forming the grooves so as to cross the compression lateral grooves 11, a composite material suitable for materials such as oils and fats and additives can be efficiently and firmly compressed and hardened. Also, by providing only the compression flutes 12, it is possible to adjust the compression force.

Thus, according to the present invention, when producing granulated cement, not only composite materials in which oils and fats are kneaded with cement, but also composite materials containing cement and oils and fats can be reliably compressed and hardened even if additives are added. In addition, the initial purpose of making it possible to provide granulated cement that undergoes a gradual hydration reaction from the surface side has been achieved.

It is a perspective view showing one example of the present invention. It is a top view showing one example of the present invention. It is a schematic side view showing one example of the present invention. FIG. 4 is a plan view showing a pressure roll provided with lateral compression grooves according to the present invention; FIG. 4 is an enlarged side cross-sectional view of a main portion showing the compressed flute of the present invention; FIG. 2 is a plan view showing a pressure roll provided with compression lateral grooves and compression longitudinal grooves of the present invention; FIG. 11 is a perspective view showing another embodiment of the present invention; FIG. 5 is a schematic side view showing another embodiment of the pressure roll of the present invention; FIG. 9 is a plan view of the pressure roll shown in FIG. 8 provided with lateral compression grooves; FIG. 9 is a plan view of the pressure roll shown in FIG. 8 provided with lateral compression grooves and vertical compression grooves; FIG. 2 shows a part of the surface of a pressure roll formed with compressed lateral grooves and compressed vertical grooves according to the present invention, where (a) is an enlarged plan view of the essential part and (b) is an enlarged front view of the essential part.

INDUSTRIAL APPLICABILITY The present invention is a compression hardening apparatus for granulated cement that compresses and hardens a composite material obtained by kneading oils and fats into cement when producing granulated cement that improves the strength and fluidity of mortar or concrete.

That is, by compressing and hardening a composite material in which oils and fats, additives, etc. are kneaded with cement particles having a particle size of about 0.05 mm, the hydration reaction is performed sequentially from the cement on the surface side of the granulated cement. Additives include, for example, a disintegrating agent that disintegrates the granulated cement from the inside when water is absorbed, and a thickening agent that has the property of improving the viscosity of the mixed material to facilitate granulation.

The present invention is an apparatus for compressing and hardening a composite material obtained by kneading oils and fats with cement between a pair of adjacent pressure rolls 10 (see FIG. 1). The pressure rolls 10 are arranged in parallel so that their surfaces are in contact with each other (see FIG. 2).

These pressure rolls 10 are driven by a geared motor P and are interlocked via gears Q (see FIG. 2). Then, the composite material placed on the pressure roll 10 is compressed and hardened by the pressure roll 10 and discharged from below. Further, if necessary, one or both of the pressure rolls 10 may be pressed from the side surface by a pressing body 20 so that the pressure rolls 10 can be opened and closed. The illustrated pressing body 20 is a coil spring, and presses and biases both longitudinal end portions of one pressure roll 10 from the side surfaces (see FIGS. 2 and 3).

In the pressure roll 10 shown in FIG. 4, a large number of compression lateral grooves 11 having a V-shaped cross section perpendicular to the longitudinal direction of the pressure roll 10 are formed on the surface of each pressure roll 10 . The composite material is compressed and hardened by a pressure roll 10 having a large number of compression lateral grooves 11 formed therein. The compression lateral grooves 11 are formed so that the openings of the V-shaped cross section of the compression lateral grooves 11 also face each other between the pressure rolls 10 facing each other.

The pressure roll 10 shown in FIG. 5 has compression vertical grooves 12 having a V-shaped cross section provided on the surface of the pressure roll 10 in parallel with the longitudinal direction of the pressure roll 10 . A large number of the compressed longitudinal grooves 12 can be formed so as to intersect the compressed lateral grooves 11 at right angles. Then, on the surface of each pressure roll 10, a large number of grid-like patterns formed by the compressed lateral grooves 11 and the compressed longitudinal grooves 12 are formed (see FIG. 6). The illustrated example shows an example in which compression flutes 12 are formed in both pressure rolls 10 . It is also possible to provide the compression flutes 12 only on one pressure roll 10 .

Each of these compressed lateral grooves 11 and compressed vertical grooves 12 forms a bottom angle of a V-shaped cross section at a right angle or an obtuse angle. This bottom is the part that becomes the surface of the compression hardened composite material. It is important that the granulated cement is hydrated sequentially from the cement on the surface side. Therefore, by making the angle of the bottom of the V-shaped cross section of the compressed horizontal groove 11 or the compressed vertical groove 12 a right angle or an obtuse angle, the shape of the surface side is prevented from collapsing, and the granulated cement that undergoes a hydration reaction sequentially from the cement on the surface side. enable the production of

Further, each of these compressed lateral grooves 11 and compressed longitudinal grooves 12 has a depth of 0.5 mm to 1.0 mm and an opening width of 1.0 mm to 2.0 mm. Then, the mixed material compressed and hardened by the pressure roll 10 provided with the horizontal compression grooves 11 and the vertical compression grooves 12 is compressed and hardened into a plate having a thickness of 1.0 mm to 2.0 mm.

In this way, by compressing and hardening a composite material made by kneading oils and fats into cement into a plate with a thickness of 1.0 mm to 2.0 mm, the composite material is integrated, preventing the surface from collapsing and preventing the cement on the surface from collapsing. It was found that the hydration reaction began to occur sequentially from the

When the horizontal compression grooves 11 and the vertical compression grooves 12 are provided so as to cross each other, protrusions are formed on the surface of the pressure roll 10 . By compressing the composite material that is press-fitted around the projection, the hardness of the composite material can be increased (see FIG. 6).

On the other hand, the pressure roll 10 shown in FIGS. 7 to 10 has a compression ridge 10A and a compression groove 10B formed on each surface of the pressure roll 10. FIG. Compressed ridges 10A and compressed grooves 10B of the pressing roll 10 facing each other are meshed to compress and harden the composite material (see FIG. 8).

These compressed ridges 10A and compressed grooves 10B are formed in parallel and alternately along the longitudinal direction of the surface of each pressure roll 10 (see FIG. 7). In the illustrated example, the pressure roll 10 can be manufactured easily by forming the compression ridges 10A and the compression grooves 10B on the surface side of the pressure roll 10 using separate members (see FIG. 8). Moreover, the surface of the pressure roll 10 may be directly unevenly processed, and the means for forming the compressed ridges 10A and the compressed grooves 10B can be selected as appropriate.

Further, the compression lateral grooves 11 and the compression vertical grooves 12 having a V-shaped cross section are formed on the surface of either one or both of the compression ridges 10A and the compression grooves 10B. For example, in FIG. 9, compression lateral grooves 11 are provided in both the compression ridge 10A and the compression groove 10B. Furthermore, by providing only the compression flutes 12, it is also possible to adjust the compression force (not shown).

These compressed ridges 10A and compressed grooves 10B are engaged with each other so that when the composite material is compressed and hardened, it becomes a plate with a thickness of 1.0 mm to 2.0 mm (see FIG. 8).

For example, by setting the protruding height of the compressed ridges 10A to 3 mm to 5 mm and engaging them, it is possible to compress and harden the composite material into a plate having a thickness of 1.0 mm to 2.0 mm. At this time, the higher the protruding height of the compressed ridges 10A, the higher the compression density of the composite material and the higher the hardness of the granulated cement. In the experiment, the meshing width between the compressed ridges 10A and the compressed grooves 10B was set to 25 mm to 30 mm, but these widths can be changed arbitrarily.

Further, in FIG. 10, both the compressed ridges 10A and the compressed grooves 10B are provided with the compressed lateral grooves 11 and the compressed longitudinal grooves 12 in an intersecting manner. In this manner, either one or both of the compressed lateral grooves 11 and the compressed longitudinal grooves 12 can be selectively provided in the compressed ridge 10A and the compressed grooved ridge 10B.

In addition, although the horizontal compression grooves 11 and the vertical compression grooves 12 are provided on both of the pair of pressure rolls 10 in the illustrated example, the compression ridges 10A and the compression grooves 10B of either one of the pressure rolls 10 can be selected. It is also possible to provide Furthermore, when providing the compressed lateral grooves 11 and the compressed longitudinal grooves 12 in the compressed ridges 10A and the compressed grooves 10B, in addition to providing the entire surface of the compressed ridges 10A and the compressed grooves 10B, a part of the surface is selected. It is also possible to provide

FIG. 11 is an enlarged view showing an example of a case in which horizontal compression grooves 11 and vertical compression grooves 12 are formed orthogonally on the surface of the pressure roll 10. As shown in FIG. In this case, the composite material is strongly compressed between the compressed lateral grooves 11 and the compressed longitudinal grooves 12 and hardened.

In the present invention, a composite material containing cement and fats and oils is cement containing vegetable and mineral fats and oils. Furthermore, this composite material may be added with a disintegrating agent that disintegrates the granulated cement from the inside when water is absorbed, or a thickening agent that has the property of increasing the viscosity of the mixed material to facilitate granulation. Granular cement is then manufactured through various processes such as forming the composite material compression-hardened by the apparatus of the present invention into arbitrary granules.

The present invention is not limited to the configuration shown in the drawings, and the configuration of the compressed lateral groove 11, the compressed vertical groove 12, the compressed ridge 10A, the compressed groove 10B, etc. provided in the pressurizing roll 10 is not limited to the gist of the present invention. Design changes can be made freely within the scope of not changing

P Geared motor Q Gear 10 Pressure roll 10A Compressed ridge 10B Compressed groove 11 Compressed lateral groove 12 Compressed longitudinal groove 20 Pressing body

Claims (3)

A compression-hardening apparatus for granulated cement that compresses and hardens a composite material in which fats and oils are kneaded with cement between a pair of adjacent pressure rolls, wherein a cross section perpendicular to the longitudinal direction of the pressure rolls is formed on the surface. A large number of V-shaped horizontal compression grooves are formed, and on each surface of the pressure roll, a large number of compression vertical grooves having a V-shaped cross section are formed parallel to the longitudinal direction of the pressure roll and intersecting the horizontal compression grooves, The compressed lateral groove and the compressed vertical groove are formed so that the bottom angle is right or obtuse, the depth is 0.5 mm to 1.0 mm, the width of the opening is 1.0 mm to 2.0 mm, and the thickness of the composite material is 1.0 mm. A compression and hardening device for granulated cement, characterized in that it is configured to be compressed to 2.0 mm . On the surface of the pressure roll, compressed ridges and compressed grooves are alternately formed along the longitudinal direction of the pressure roll, and on the surface of either or both of the compressed ridges and the compressed grooves, A large number of compression lateral grooves having a V-shaped cross section perpendicular to the longitudinal direction of the pressure roll are formed, and the compression ridges and compression grooves of the opposing pressure rolls are engaged with each other to form the composite material with a thickness of 1.0 mm. 2. The compression-hardening device for granulated cement according to claim 1, which is configured to be compressed to 2.0 mm. A large number of compressed vertical grooves having a V-shaped cross section parallel to the longitudinal direction of the pressure roll are formed on the surface of either one or both of the compressed ridges and the compressed grooves, and the compressed vertical grooves are formed as described above. 3. The compression-hardening device for granulated cement according to claim 2, which is provided so as to intersect the compression lateral grooves or to form only the compression longitudinal grooves.

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