KR930009343B1 - Process for producing and device of cement a mixture sand - Google Patents

Abstract

The dry cement mortar is prepared by conveying sun-dried sand to the first screen, removing large size sands and pebbes to produce the first screened sand, moving it to a dryer e.g. rotary kiln, removing water off the sand, removing dusts and carbides from the dry process at the second screen and a back-filter connected with the dryer, moving the mixer to mix cement with sands at a ratio and store the mixture in silos. The cement is changed to mortar only with the adding of water.

Description

Manufacturing method of cement mixed with sand and apparatus for manufacturing same

1 is a schematic diagram showing a manufacturing apparatus according to the manufacturing method of the present invention.

2 is a plan view of FIG.

3 is a manufacturing process diagram according to the present invention.

4 is a partially cutaway exploded perspective view showing an example of a dryer (DRYER) used in the manufacturing process of the present invention.

5A and 5B are a plan view and a cross-sectional view showing one example of a mixer (MIXER) used in the manufacturing process of the present invention.

* Explanation of symbols for main parts of the drawings

10: sand storage unit 20: horizontal conveying conveyor

30: oversize screen 40: inclined feed conveyor

50: dryer 60: rotary screen

70, 160: bucket elevator 80, 150: screw conveyor

90: dry sand cycle 100: back filter

110: cement silo 120: meter

130: Mixer 140: Hopper

170: product storage

The present invention relates to a cement composition (hereinafter referred to as "mixed cement") and a method for producing the same, wherein the sand is prepared by mixing the appropriately dried sand in a certain ratio, and particularly contains about 4-6% water It is a method for producing mixed cement, which is produced by properly mixing sand by a drying apparatus using heating and mixing the cement to dry sand in a ratio of 1: 3 by accurate metering.

Conventionally, the contents of dry cement mortar prepared by mixing such dry sand and cement are known, but this is simply by drying and mixing the sand so that foreign matters mixed in the sand are included in the cement mortar. It was very difficult to smooth the surface. Also, by manually drying the sand and mixing it with cement in a separate process, the sand heated by the drying heat was absorbed to absorb moisture from the air and mixed with cement. If it takes a long time, such as storage process had a problem that is cured by itself.

In the present invention, the mixed cement is most suitable for the construction plaster to treat the surface of various buildings, while mixing only water at the construction site, so that it can be used immediately, the mixture does not contain the foreign matter such as twigs during the plastering work of the fine surface Plastering is possible and it can fully play a role as mortar without hardening even after long-term storage.

According to the method of manufacturing a mixed cement of the present invention, it is possible to simply and quickly produce and supply a mixed cement suitable for building plaster, mortar or concrete by a single process by accurate weighing and blending.

In general, until now, cement used for building plastering, mortar, or concrete has not mixed with sand at all, so it is purchased separately from cement, and the natural moisture of sand is dried appropriately at the site. It was used in combination.

Therefore, there were difficulties and inconveniences such as a place for loading cement and sand separately, a place for drying sand, and various equipment and personnel required to mix cement and sand.

In addition, in the past, since the cement and sand were manufactured and supplied by independent processes, the present invention went through several processes. However, the present invention provides a mixed cement in which cement and sand are mixed at a predetermined ratio suitable for building plaster in one independent process. The effect of plastering can be achieved in one process.

According to the present invention, the sand containing 4-6% of water is dried in a dryer heated at 120-200 ° C. for 1 to 2 screens to have even particles, and then the cement: dry sand ratio is 1: It is to provide a manufacturing method for producing a mixing cement suitable for commercial use, especially for building plastering by mixing so as to mix to 3 to mix well.

The present invention solves the conventional inconveniences as described above in the construction site to provide a mixed cement produced by mixing the cement and dry sand in a certain ratio so as to be used immediately if mixing only a suitable ratio of water in the construction site The purpose is.

It is another object of the present invention to provide a method and apparatus for producing the mixed cement.

The present invention will be described in detail with reference to the accompanying drawings as follows.

1 is a schematic view showing a manufacturing apparatus according to the manufacturing method of the present invention, Figure 3 is a manufacturing process diagram according to the present invention, as shown therein a constant water content stored in the sand storage unit 10 horizontal conveying conveyor It is conveyed along the 20 and the primary screen on the oversized screen 30 to remove the sand and gravel having a relatively large particle size to transfer the selected sand to the inclined feed conveyor 40 to be heated by the burner 51. The rotary screen 60, which is properly dried while passing through a dryer (DRYER) 50, removes the fine sand below the particle size and the organic carbide generated in the drying process, and is then transferred along the bucket elevator 70 to the screw conveyor ( 80 is supplied and stored in the dry sand cycle (90).

The duct suction pipe 101 is installed on the upper side of the dryer 50 to connect and connect with the back filter 100 to suck in dust generated in the dryer 50.

One side of the drying sand cyclone (90) is provided with a cement cyclone (110) for storing the normal cement, the dry sand and cement stored in the sandblasting (90) and cement cyclone (110) Installed at the lower side of the dry sand cyclone 90 and the cement silo 110 is metered at a constant rate by an automatic adjustment meter 120 that is adjusted by an automatic control device (not shown) and supplied to the mixer 130. After mixing well for a certain time, the mixing cement, that is, the sand is metered at a certain ratio and supplied to the mixer 130, and then mixed well for a predetermined time, it is made of a cement composition mixed with a mixing cement, that is, a certain ratio, It is supplied to the screw conveyor 150 through the hopper 140 under the mixer 130 is transferred along the bucket elevator 160 is supplied to the product storage cycle 170.

A slide damper 180, a rotary feeder 190, and a screw conveyor 200 are installed at the lower side of the product storage cycle 170 to automatically mix the cement stored in the product storage cycle 170. The product production process is completed by supplying the product to the packaging device and packaging it.

According to the present invention, the sand containing 4-6% of moisture is appropriately dried by the dryer 50 through the manufacturing process as described above, and the dry sand is mixed with the cement by a constant ratio by the mixer 130. The mixture is mixed with dry sand: cement in a ratio of 3: 1 to make it suitable for building plastering, mortar, or concrete.

The present invention can be seen from the following (Table 1) that can be provided the most economically the maximum production, especially in the case of using sand having a moisture content of 5%.

TABLE 1

* (Table 1) shows the production in the dryer according to the moisture content of the sand, the numerical value is based on the heating time of the drying temperature 120 ~ 200 ℃ sand of the dryer.

Dryer 50 used in the manufacturing process according to the present invention is installed on the outer periphery of the drum for drying drum (53) is inclined 3-4 ° on the four support rollers, the drum 52 Rotating by the rotation of the drum gear 54 installed on the outer periphery, a sand inlet 55 is formed on the upper side, a sand outlet 56 is formed on the lower side, the ordinary burner 15 on the lower side It is configured to hitch.

In addition, the inner circumference of the drum 52 is provided with a large bucket (57) for raising sand from the upper side to the lower side, a small bucket (58) for stirring, a guide protrusion (59), the heating temperature is 120 ~ 200 ℃ Approximately 100 tonnes takes about 60 minutes to produce.

In addition, the heating flame is a direct heat-drying method which touches sand for 2-3 minutes.

The mixer 130 used in the manufacturing process according to the present invention is a plurality of mixing lead 133 mounted on the shaft 132 driven by the electric motor 131, and mixes cement and dry sand well. .

The mixer 130 mixes cement and sand in a predetermined ratio by an automatic adjustment meter 120 which is pre-set by an automatic control device (not shown) and metered at a predetermined ratio according to an input program, and mixed for a predetermined time. This completes the preparation of the mixed cement.

At this time, the mixing time of the mixer 130 is used for about 30 seconds.

Such a mixed cement according to the present invention and a method for manufacturing the same may be provided with a cement composition obtained by mixing cement, that is, sand for building plastering or mortar or concrete by a single process.

In the present invention, in particular, the ratio of cement and dry sand is provided with a mixed cement having a mixing ratio of 1: 3, but in the practice, the ratio of cement and dry sand may be different. It can be adjusted.

In addition, in the practice of the present invention, a water content of sand other than 4-6% can be used, and in this case, the hotter temperature of the dryer, the amount of sand input, and the like can be appropriately adjusted.

Mixing cement according to the present invention as described above is because the cement and dry sand is mixed at a low ratio so as to be suitable for construction bar in the construction site is to mix and then mix the water in the mixing cement as appropriate. Anyone can do the construction simply and easily, and the labor cost is reduced and the overall construction cost by the process shortening is very useful.

The present invention does not need to purchase cement and sand separately, and does not need to dry sand separately, and does not need to mix and mix cement and sand at a predetermined ratio, and its use is easy, as well as distribution channels. In addition, it can be easily traded, and it can be used to solve the difficulties caused by recent labor shortages.

Claims (2)

The sand transported from the sand storage unit 10 for supplying sand is transported by the horizontal transport conveyor 20 and then transported by the inclined transport conveyor 40 through the oversize screen 30 and then passed through the dryer 50. While being properly dried and then transported by the bucket elevator 70 and the screw conveyor 80 via the rotary screen 60 is supplied and stored in the drying sand cycle (90), the upper side of the dryer 50, the duct suction pipe Cement and dry sand are metered at a constant rate by mixing with the mixer 130 by an automatic adjustment meter 120 installed on the lower side of the wheat pitter 110 where 101 is installed, and then discharged through the hopper 140. Apparatus for producing a cement composition in which the sand is mixed by a continuous process, characterized in that the product is supplied to the product storage path 170 by the screw conveyor 150 and the bucket elevator (160). Sun-dried sand is transferred to the primary screen through conveyors to remove the coarse-grained sand and gravel from the primary screen to produce the primary selected sand, and the primary selected sand to a rotary kiln lamp dryer. Remove the water mixed with sand to make the dry sand and move to the secondary screen to remove dust and carbides generated during the drying process through the back filter, which is connected from the screen and the dryer, and send it to the mixer for a certain amount of cement and sand. Method of producing a dry cement mortar consisting of a series of processes characterized in that the packaging and mixing.