JPS62227705A - Method of mixing hydraulic composition and mixer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and a mixing machine for mixing a hydraulic composition that is a raw material for manufacturing lightweight aerated concrete material (ALC material) and the like.

[Conventional technology]

Conventional equipment for batch-mixing raw materials for lightweight aerated concrete such as ALC, i.e., mixers, contain fine powders such as cement and quicklime, so these raw materials scatter when fed into the mixer and are present inside the mixer. When the powder adheres to the shaft and blades of the agitator, as well as the top cover of the mixer, and is used for a long time, the adhering powder solidifies due to the irrigation reaction between the cement and water.

Therefore, after such a state has been reached, it becomes difficult to remove and clean these deposits, and a great deal of time and man-hours are required to remove and clean them. In this case, the lower layer of the stirrer is always in contact with the slurry IJ- in the mixer, so there is no adhesion, but the upper layer is exposed to the atmosphere as the mixed liquid level fluctuates.
Since the immersion in the mixed slurry is repeated, the longer the exposure time, the greater the amount of this adhesion, which requires a long time to remove and clean. Further, regarding the top lid of the mixer, the mixed slurry is scattered and adhered to the floating adhesion of powder components, which causes the mixture to become solid and swampy, making it difficult to remove and clean.

Moreover, when these solidified substances grow to a certain extent, they cause mass peeling due to the kinetic energy of the stirred mixed slurry, and these are present in the form of relatively large particles in the mixed slurry. When cutting with a mortar cutter, linear scratches are created on the cut surface, significantly damaging the appearance of the product.

To prevent this sticking, it is possible to wash each batch with water after mixing, but washing takes time and reduces the capacity of the mixer, requires a large amount of washing water, and causes material loss. Although washing with water was performed once every 30 batches, the above-mentioned problem occurred that the adhesion of powdery substances could not be avoided.

[Problems to be solved by the present invention]

This invention has been made by paying attention to the above-mentioned problem. The purpose of this is to prevent solidified materials from sticking to the inner surface of the mixer, and to improve the hydraulic properties of peeled off solidified materials when mixing water into a hydraulic composition by adding mixed water to raw materials such as hardening materials such as cement and gypsum. An object of the present invention is to propose a method and a mixer for mixing a hydraulic composition, which can prevent mixing into the composition.

[Means for solving problems]

This method of mixing hydraulic compositions involves adding mixed water to raw materials such as hardeners and mixing them in a batch mixer. It is characterized by being supplied by being scattered by hitting an attached rotating blade. Another invention is a mixer that batch-mixes a hydraulic composition by adding mixing water to raw materials such as a hardening material, and is equipped with a rotating blade for water splashing at the upper rotating shaft position. It is characterized by having a water supply port facing the blade and supplying mixed water.

[For production]

This mixing method and mixer are constructed as described above.
Every time batch mixing is performed, the stirring shaft, stirring blades, and inner surface of the top lid exposed to the atmosphere above the raw material input level are washed by the supplied mixed water that hits the rotating blades and is splashed. Therefore, hardening agent powder or slurry such as cement is washed away, and it is possible to prevent solidified materials from sticking. Furthermore, these adhered substances do not peel off and become mixed into the composition.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments.

Figures 1 and 2 show a mixer for mixing hydraulic compositions, which are raw materials for ALC materials, and include a vertically placed mixing tank 1 with a circular cross section, a stirring shaft 2 passing through the axis of the tank, and a protruding shaft on the inside of the tank. It has fixed stirring blades 3 which are arranged in multiple stages in the radial direction, and rotating stirring blades 4 which are arranged in multiple stages in the radial direction and which are attached to a stirring shaft.

A disk 5 that intersects at right angles to the stirring shaft 2 is located near the upper end of the stirring shaft 2.
is attached, and 12 rotary blades 6 for water splashing are protruded from the upper surface thereof and extend in radial directions around the axis. Tank 1
The upper lid 7 that covers the upper surface has a powder inlet 8 near its periphery.
, a slurry injection port 9 is provided, and the tip of the water supply pipe 10 branches into two, and water supply ports 11 are opened at a position close to the center of the upper cover, that is, at an upper position facing the disk 5.

In this mixer, the mounting position of the disk 5 at the upper end of the shaft 2 is located above the upper limit level at which composition raw materials such as cement are introduced, and is at a height that does not reach the level of the slurry during stirring and mixing. .

Further, the rotary blade 6 protruding from the upper surface of the disk 5 is a rectangular flat plate, and the rotary blade 6 is mounted with its surface inclined at 90 degrees and 45 degrees with respect to the surface of the disk 5. Various angles can be selected for this inclination angle so that the water supplied from the upper water supply port 11 can hit and scatter in the desired range, but usually 90° and 45° are selected. By using them together and increasing the angle of 90°, the objective can be achieved.

＼When mixing the hydraulic composition used in the ALC material with this mixer, slurry components such as silica slurry are poured from the slurry input port 9 while rotating the stirring shaft 2, that is, the stirring blades 4 and the rotary blades 6. Then, powder components such as quicklime and cement are introduced from the powder inlet 8. After stirring and mixing for a predetermined time, water is introduced from the inlet 11.

The injected water hits the rotating rotary blade 6 and disc 5 and scatters around it, washing off powder and slurry adhering to the top cover 7 and the upper part of the inner wall surface, and then falling into the tank where it is stirred and mixed with cement, etc. Ru.

Finally, a suspension of aluminum powder is introduced through a specified inlet (not shown) to obtain a desired hydraulic composition.

Regarding the timing of adding water, if the specific gravity of the mixed slurry before adding water is high and there is a risk of incomplete mixing, the water injection should be divided into two times, and the first time should be used to remove slurry components such as silica slurry. It is also possible to add the remaining water at the same time as adding powder components such as quicklime and cement, and then add the remaining water after stirring and mixing.

〔Effect of the invention〕

The present invention is as described above, and according to this mixing method and mixer, when mixing a hydraulic composition containing a hardening agent such as cement, each time a batch is mixed, the splashed water is used to cover the upper part of the mixer. Adhering cement, slurry, etc. are washed away. Therefore, washing with water to remove stuck substances becomes unnecessary, and it is possible to rationalize the work and improve the equipment operating rate.

In addition, coarse adherents do not peel off and get mixed into the composition, and troubles that occur when cutting piano wire, etc., can be prevented.

[Brief explanation of drawings]

Figure 1 is a partial vertical sectional view of the mixer, and figure 2 is a sectional view taken along line A-A. 1... Mixing tank, 2... Stirring shaft, 3...
...Fixed stirring blade, 4...Rotating stirring blade,
5...Disc, 6...Rotating blade for water scattering, 7...Top lid, 8...Powder inlet,
9...Slurry input port, 10...Water speed supply pipe, 11...Water supply port. −ku

Claims (2)

[Claims] (1) In a method of mixing hydraulic compositions in which mixed water is added to raw materials such as hardeners and mixed in a batch mixer, the mixed water is poured into the mixer using a rotary vane installed above the level of the raw materials fed into the mixer. A method for mixing a hydraulic composition, characterized in that the composition is supplied by being scattered by hitting the composition. (2) A mixer that batch-mixes a hydraulic composition by adding mixed water to raw materials such as hardening materials, is equipped with a rotating blade for water splashing at the upper rotating shaft position, and the mixed water is directed towards this rotating blade. A mixing machine for a hydraulic composition, characterized in that it is provided with a water supply port.