JP2883602B1 - Powdered hijiki and its manufacturing method - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To contain a large amount of iron, especially abundant minerals, as a fine powder which is easy to digest and absorb in the intestinal tract.
Be able to replenish iron deficiency associated with women's menstruation. SOLUTION: Dried hijiki which is a crushing material (M) is immersed in water or hot water, the water is cut off, and then softened by heating / stirring action and steaming / drying action which are sequentially applied under vacuum conditions. It is a fine powder pulverized to an average diameter of about 10 microns or less under cooling conditions, and 100
Contains about 200 mg or more of iron per gram.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material which can be mixed in various processed foods, a powdered hijiki which is itself useful as a health food, and a production method therefor.

[0002]

2. Description of the Related Art Generally, seaweeds are rich in minerals as nutrients. Among them, powders such as kelp, wakame seaweed, and laver are commercially available as kelp tea, for example. It is used as a material useful for improving the texture and throat, giving out flavor, imparting a hidden taste, and complementing colors in noodles, soups, and other various processed foods.

[0003] On the other hand, hijiki powder has not yet been marketed as the above-mentioned foods or its ingredients, except for being used for chicken feed, etc., and the reasons are as follows. Can be

[0004]

That is, in the case of dried hijiki, which is generally available on the market, there are large variations and unevenness as a food material in each production area. In order to eliminate the unevenness, the food is once steamed and then dried with hot air. . Because the product is a product whose surface is dried by hot air, it is difficult to pulverize it into fine particles having an average diameter of about 100 microns or less because the fiber is still hard and the core remains in a state. ,
This is because the nutrients are lost by hot air drying at an excessively high temperature.

[0005] In this regard, it is said that hijiki is an iron source rich in the above mineral components and contains about 55 mg of the iron per 100 g. Therefore, it is impossible for the human body to absorb and ingest the nutrients, and it is poor in use value as food or its material.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and, because of its structure as a powdered hijiki, a dried hijiki as a crushing material is immersed in water or hot water, and the water is removed. After cutting, it is softened by heating / stirring action and steaming / drying action which are sequentially applied under vacuum conditions.
It is a fine powder that has been subsequently pulverized to an average diameter of about 10 microns or less under cooling conditions, and contains about 200 mg or more of iron per 100 g as a nutritional component,

[0007] As a method for producing the above-mentioned powdered hijiki, dried hijiji, which is a crushing agent, is immersed in water or hot water for a certain period of time, the water content is cut off, and then the mixture is poured into a stirring tank of a mixer. Under the covered vacuum conditions, the heating and stirring action and the steaming and drying action are successively applied to the crushing material in order to soften the fibrous material to a water content of about 10% or less. The crushed material in a dry state is then transferred into a crushing tank of a ball mill, and crushed into fine powder having an average diameter of about 10 μm or less under cooling conditions of about 35 ° C. or less using the cooling water. It is a feature.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. First, FIGS. 1 to 3 show a special mixer (A) used for producing powdered hijiki according to the present invention.
Thus, a series of heating, stirring, steaming, and drying actions are applied to the dried hijiki, which becomes the crushing material (M), so that the fibrous material is softened and dried. Here, dried hijiki as a crushing material (M) is a commercially available hot-air dried product having an inconsistent length of about 5 to 30 mm, which is purchased and used.

Reference numeral (10) denotes a housing for the mixer (A), and reference numeral (11) denotes a stirring tank fixedly supported on substantially one half of the mixing tank. The depth is about 780 mm and the diameter is about 80 mm from a steel plate.
It is shaped into a cylindrical shape with a bottom of 0 mm, and about 60 m
A cable heater (12) for heating the crushing material (M) is provided on the body wall of the double structure having a thickness of m.
It is buried in a wound state. A preferred temperature of the cable heater (12) is about 180 ° C.

Reference numeral (13) denotes a rotating blade shaft vertically erected so as to penetrate the upper and lower portions of the stirring tank (11) and the installation machine casing (10), and is exposed into the stirring tank (11). At the upper end, a flat rotating stirring blade (14a) (1
4b) is fitted so that it can rotate integrally. In addition, the rotary stirring blades (14a) (14b) are installed in a horizontal state near the bottom surface in the stirring tank (11). On the other hand, a transmission pulley (15) is also fitted to the lower end of the rotating blade shaft (13) facing into the installation machine casing (10) so as to be able to rotate integrally.

In this case, in the illustrated example, the cross-shaped rotary stirring blades (14a) (14
The upper and lower pairs of b) are shown, but the number and height of the crushers (M) can be adjusted according to various conditions such as the properties of the crushing material (M) and the processing amount. It is also possible to attach / detach / replace with a different number of separate rotary stirring blades.

An electric motor (16) is mounted on the other half of the installation casing (10) in a state of being fixed in parallel with the stirring tank (11), and has a lower end facing the interior of the casing (10). Output pulley (17) and the transmission pulley (1)
A transmission belt (18) is wound and stretched between each other. The motor (16) causes the rotary stirring blades (14a) (14b) to move in the direction of the arrow (r) in FIG.
It is designed to be driven to rotate.

Reference numeral (19) denotes a slide type opening / closing lid for covering the top surface of the stirring tank (11).
It is attached to the upper end of the body wall in 1) via a pivot mechanism (20). (21) is a hydraulic pump for pushing up the opening / closing lid (19), and (22) is a plurality of clamps for fixing the opening / closing lid (19) in a state of covering the stirring tank (11) against the pushing force. When the opening / closing lid (19) is released, the opening / closing lid (19) rises from the agitation tank (11) by the hydraulic pump (21), so that the opening / closing lid (19) is turned laterally as shown in FIG. Thereby, the top surface of the stirring tank (11) can be opened, and the crushing material (M)
Can be put in and out.

The opening / closing lid (19) is also made of a steel plate to a thickness of about 6
It has a double structure of 0 mm, in which a cable heater (23) for heating the crushing material (M) is buried. The cable heater (2
3) is about 1 which is slightly higher than that of the stirring tank (11).
It is desirable to set to 90 ° C.

Reference numeral (24) denotes fixed stirring blades which are integrally hung from the eccentric position of the opening / closing lid (19) toward the inside of the stirring tank (11) by a depth of about 460 mm, and are also flat. When viewed from a plane as shown in FIG. 3, the rotary stirring blades (14a) and (14b), which are driven to rotate in the direction of the arrow (r), and the flat plate surfaces form an acute angle (θ) when viewed from a plane as shown in FIG. Crosses the relationship to keep.

The crushing material (M) stirred by the rotary stirring blades (14a) (14b) is transferred to the fixed stirring blades (2).
As described in 4), the material is turned back once to generate frictional heat based on the rapid flow change, and the crushing material (M) can be uniformly agitated as a whole.

In this regard, in the illustrated example, only one of the fixed stirring blades (24) is suspended, but a plurality of the fixed stirring blades (24) may be suspended from the opening / closing lid (19) of the stirring tank (11). However, the crushing material (M) includes a rotary stirring blade (14a) (14b).
Due to the centrifugal force of the agitation, the fixed stirring blade (24) that turns it back faces the position close to the body wall of the stirring tank (11), and the crushing material (M) adheres to the body wall. It is desirable to prevent.

Reference numeral (25) denotes a contact-type temperature detection sensor attached to the lower end of the fixed stirring blade (24), which detects the heating temperature of the crushing material (M) and determines the temperature in advance. When the set target temperature is reached, an electric control circuit is configured to stop the driving motor (16) of the rotary stirring blades (14a) (14b). The set target temperature of the crushing material (M) is preferably determined to be at most about 75 ° C. so as not to destroy the nutrient components. This temperature is also the height at which the fibrous material of the crushing material (M) can be softened.

Further, reference numeral (26) denotes an exhaust port tube which is vertically suspended outward from the eccentric position of the opening / closing lid (19), and is provided with a vacuum pump via a flexible hose (27) having a fixed length. (28) and the vacuum pump (2
According to 8), the inside of the stirring tank (11) is depressurized,
The vacuum can be maintained.

(29) is a vacuum valve inserted in the connection path, (30) is an atmosphere valve, and (31) is an atmosphere release valve, both of which are electrically controlled solenoid valves. (32) is a vacuum gauge. The regulator is not shown.

When the powdered hijiki of the present invention is produced using the above mixer (A), a certain amount of dried hijiji, which is a crushing material (M), is immersed in water or hot water for a certain period of time. After the water is drained, the mixer (A) is charged into the stirring tank (11), and the stirring tank (11) is fixed in a state of being covered with the opening / closing lid (19).

At this time, the crushing material (M) is not limited to a method in which the crushing material (M) is immersed in water or hot water in a separate container, drained of the water, and then transferred from above into the stirring tank (11). It is also possible to cut off the moisture by directly immersing in 11) and sucking out the water or hot water from the stirring tank (11).

In any case, after the stirring tank (11) is covered, the vacuum pump (28) is operated to reduce the internal pressure to a vacuum state and the crushing material (M) under the vacuum conditions. The rotary stirring blades (14a) and (14b), which are driven to rotate at a speed of about 700 rpm, and the fixed stirring blades (24) hanging down from the opening / closing lid (19) perform a uniform stirring action.

Then, the crushing material (M) is added to the stirring tank (1).
1) Cable heater (12) and its opening / closing lid (19)
The cable heater (23) receives a heating action from the outside, while the stirring blades (14a) (14)
b) In the process of undergoing the vigorous stirring action of (24),
The self-heating action also occurs due to the repetitive friction, and the overall temperature rises efficiently.

However, since such a heating and stirring action is performed under vacuum conditions, the crushing material (M)
There is no danger that the nutrients may be destroyed or scorched (generation of bitterness) due to the addition of excess heat, such as the phenomenon of crushing.

Eventually, when the vacuum pump (28) can no longer absorb moisture, the state automatically shifts to the steaming state of the crushing material (M). Then, after that, the vacuum pump (28) gradually sucks in water vapor due to the heating and self-heating of the crushing material (M), and when the water content becomes stable, the crushing material (M) performs the drying action shifted from the steaming action. You will receive it yourself.

That is, the steps of heating, stirring, steaming and drying the above-mentioned crushing material (M) are automatically and continuously executed in the same stirring tank (11). Finally, when the temperature reaches about 75 ° C., which is the set target temperature, it is possible to obtain a stable and softened dry crushing material (M) having a fiber content of about 10% or less of moisture.

Then, the fact that the temperature of the crushing material (M) has been raised to the set target temperature is indicated by the heating temperature detecting sensor (25).
, The drive motor (16) of the rotary stirring blades (14a) (14b) electrically connected thereto is stopped, and the vacuum pump (2)
Since the vacuum state in the stirring tank (11) according to 8) is also released, the top surface of the stirring tank (11) is opened to take out the crushing material (M) from the stirring tank (11).

Next, FIGS. 4 to 6 show a special rotary aeration type ball mill (B) for continuously pulverizing the fibrous material (M) in a softened and dry state into fine powder of a target size. ).

(33) is a grinding tank of the ball mill (B), which is installed and fixed in a horizontal state as a closed cylindrical type having a length of about 910 mm and a diameter of about 200 mm, and a chromium steel inside. Ball for grinding (3
The number of groups of 4) is enclosed. The ball (34) causes the crushing material (M) to repeatedly rub and crush into fine powder of a target size.

In this regard, in the illustrated example, the target size is set to about 10 microns or less, and the ball (34) having a size of about 3/8 inch is placed in the pulverizing tank (33) for about 3/8 inches.
Although about 75 kg corresponding to / 4 is accommodated, the smaller the target size, the better.

The body wall of the grinding tank (33) has a ball (3
The inner wall surface (33a) made of the same chrome steel as in 4) and an outer wall surface (33b) made of a steel plate are formed in a double structure, and the hollow inside thereof is formed as an annular cooling jacket (35). Approximately 12 liters of cooling water are flowed per minute so that the crushing material (M) can be ground while maintaining the cooling condition at about 35 ° C. or less.

That is, the crushing material (M) is rubbed between the crushing ball (34) and the inner wall surface (33a) of the crushing tank (33) and generates excessive heat. The purpose is to prevent the possibility that the nutrient may be destroyed by the cooling action of the cooling water flowing through the cooling jacket (35).

An air inlet / outlet cylinder (37) from an air pump (36) is connected to the operation start end in the longitudinal direction of the crushing tank (33), while the operation end of the crushing tank (33) is also connected. Is a product discharge path (38) from which the finished product after grinding-powdered hijiki (P) can be dropped,
The opening is formed downward.

(39) is a ball receiving screen for defining the product discharge path (38), which is formed of chrome steel into a fence shape as shown in FIG.
It is interposed and installed in the partition state in 3). As a result, the crushing balls (34) and foreign substances are received, and continuous and crushing can be repeatedly performed, and only the ground powder (P) after the crushing is smoothly passed through the discharge path (38). I have. As far as it is concerned, a ball receiving screen (3
9) may be adopted.

In any case, the ball receiving screen (39) is detachable / replaceable with a separate ball receiving screen having a different gap width and a different hole diameter depending on the size of the crushing ball (34). Crushing tank (3
3) Can be installed and used inside.

(40) a cooling water inlet tube to the cooling jacket (35), (41) a cooling jacket (35)
From the cooling water outlet tube from FIG.
The former is formed on the top surface of the crushing tank (33), and the latter is formed on the bottom surface of the crushing tank (33). The cooling water inlet cylinder (40) of the former is particularly connected to the crushing tank (33). The reason why the cooling water is directed toward the latter cooling water outlet tube (41) by disposing it at a position deviated near the operation end point is as follows.

The crushing ball (34) receives the air pressure from the air pump (36) and the pressing force of a screw blade described later, and stays in a dense state at the working end portion of the crushing tank (33). It is likely that the heat of friction of the crushing material (M) is highest and may destroy nutrients, so that it is effectively cooled by fresh cooling water having a low temperature and farthest from here. This is for distributing and disposing the cooling water outlet tube (41) in the vicinity of the operation start end to effectively use the cooling water.

A crushing material input hopper (42) is also provided integrally with the cooling water outlet tube (41) so as to face the cooling water outlet tube (41) from the top surface at the operation start end of the crushing tank (33). The softened and dried crushing material (M) is put into the crushing tank (33).

(43) is a horizontally installed state along the longitudinal center line of the crushing tank (33), and a rotating blade shaft introduced from its operation start end, and (44) is a rotating blade shaft (43)
Transmission pulley fitted and integrated into the exposed end of the
Reference numeral 5) denotes an electric motor for driving the rotary blade shaft (43). A transmission belt (47) is wound around an output pulley (46) and the transmission pulley (44). I have.

Further, (48) is a hopper (4
The relationship corresponding to the position below 2) is a crushing material pressing screw blade fixed so as to be able to rotate integrally with the operation start end of the rotary blade shaft (43), whereby the hopper (42) As shown by the arrow (f) in FIG. 4, the charged crushing material (M) is pushed toward the operation end portion in the crushing tank (33).

(49) is a distribution state which keeps a constant distance from the end of operation of the screw blade (48), and a plurality (4 in the illustrated example) fitted so as to be able to rotate integrally with the rotary blade shaft (43). Pieces) of ball dispersion blades, the same chrome steel as the screw blade (48), having a diameter of about 15 mm.
It is formed in a 0 mm disk shape.

The dispersion pressure of the ball (34), which is subjected to the air pressure from the air pump (36) and the pressing force of the screw blade (48) to the working end portion in the crushing tank (33), is determined by the dispersion blade. (49) to prevent,
They can be dispersed as uniformly as possible.

However, one dispersing blade (49) located at the end of operation of the rotating blade shaft (43) is relatively close to the ball receiving screen (39), and the distance between the dispersing blades (49) is small. 49) Dimensions are narrower than adjacent spaces between each other. As a result, the crushing material (M) is crushed into a uniform fine powder, and the crushed product-powder seaweed (P) is discharged from the screen (39) through the discharge path (3).
8) The reason is to pass through without fail.

When the dried softened crushing material (M) is continuously pulverized using the ball mill (B), the dried hijiki as the crushing material (M) is put into a hopper (42). ), Into the crushing tank (33) containing the crushing balls (34) in advance at a constant supply speed.

Then, a certain amount of air is pressure-fed from an air inlet tube (37) of the pulverizing tank (33) toward a product discharge path (38) by an air pump (36).
The rotating blade shaft (43) is rotationally driven at a speed of about 400 rpm by the driving motor (45).

Then, the crushing material (M) and the crushing balls (34) are subjected to the air pressure from the air pump (36) and the pressing force of the screw blade (48), and the operation of the crushing tank (33) is performed. As shown by the arrow (f) in FIG. 4, the crushing material (M) repeatedly receives the frictional force of the ball (34) from the starting end to the working end as shown by the arrow (f) in FIG. Is crushed into a fine powder having a target size corresponding to the size.

During the pulverizing operation, the crushing material (M) subjected to the rotational centrifugal force is applied between the inner wall surface (33a) of the crushing tank (33) and the ball (34) also subjected to the rotational centrifugal force. In this case, since the friction is repeated, there is a possibility that excessive heat is generated, and the heat is remarkable at the operation end portion of the grinding tank (33) which tends to stay in the dense state of the balls (34). The important phenomenon is that the cooling action of the cooling water flowing through the cooling jacket (35) is suppressed to about 35 ° C. or less, so that there is no possibility that the nutrient component of the crushing material (M) is destroyed.

The grinding balls (34), the inner wall surface (33a) of the grinding tank (33), the ball receiving screen (39), and the screw blades (4) of the rotating blade shaft (43).
8) and the dispersion blade (49) are each made of a high-strength chromium steel, so that the softened and dry crushing material (M) can be reliably crushed, and Powdered hijiki (P) can be efficiently finished and has excellent durability in mass production.

Then, the product-powder hijiki (P) pulverized into fine powder of the target size is supplied to the pulverizing tank (33).
From the product discharge path (38). Since the ball (34) is received by the screen (39) and is still in the state of being housed in the crushing tank (33), the crushing material (M) can be successively crushed, which is extremely useful for mass production. It is.

An example in which the production method of the present invention is applied to dried hijiki as the crushing material (M), and the dried hijiki is finished into a product-powdered hijiki (P) is as follows.

<Embodiment> The cable heater (1) of the stirring tank (11) in the mixer (A) shown in FIGS.
2) 180 ° C, 190 ° C for the cable heater (23) of the opening / closing lid (19), 75 ° C for the heating target temperature of the crushing material (M), and 700 rpm for the rotating speed of the rotating blade shaft (13).
m, and 120 kg of dried hijiki soaked in water for about 10 minutes is drained for about 30 minutes, then put into the stirring tank (11) of the mixer (A), and the stirring tank (11) Under the condition of keeping the inside vacuum, a heating / stirring action for about 30 minutes, a steaming action for about 1 hour, and a drying action for about 40 minutes were given.

On the other hand, 3/8 inch grinding balls (34) are put into a grinding tank (33) of a rotary ventilation type ball mill (B) shown in FIGS. About 12 liters of cooling water is flowed per minute to the cooling jacket (35) of the grinding tank (33), and the cooling temperature of the cooling water is set to 35 ° C. or less, and the rotating blade shaft ( 43) Rotation speed of 400 rpm
m, the ball receiving screen (39) was set to 400 mesh capable of removing foreign substances.

The use of the mixer (A) provided a stable and softened dry state in which the fiber of the crushing material (M) had a water content of 10% or less, which was then pulverized by the ball mill (B). Powdered hijiki (P) having an average diameter of 10 microns or less by being transferred to the tank (33) and crushed.
Finished.

Analysis of the main nutrients contained in the sample by requesting the above product-powder hijiki (P) as a sample to the Mie Food Analysis Center (9-5, Akabori Shinmachi, Yokkaichi City, Mie Prefecture) The results of the test are as shown in the following Nutrition Facts Table.

[0056]

[Nutrient composition table]

As can be seen from the above nutritional composition table, in the powdered hijiki (P) of the present invention, the weight ratio of water to 100 g was 8.9 g, and even if the powder was finished to a dry state of about 9% water, Contains nutrients almost equivalent to commercially available dried hijiki and no destruction of the nutrients is observed. Therefore, as a fine powder having an average diameter of about 10 microns or less, based on its soluble form in the intestinal tract, these nutrients can be reliably absorbed and ingested into the human body.

In particular, among the abundant minerals, extremely high nutritional values can be obtained for iron and magnesium. There are two types of iron, heme iron generally contained in animal foods and non-heme iron contained in plant foods.
The former is said to have a good absorption rate to the human body despite its low content, while the latter is said to have a poor absorption rate even if the content is high. This is because it is greatly affected by the solubility (digestibility) in the digestive tract.

In this regard, the powdered hijiki (P) of the present invention is a fine powder having an average diameter of about 10 μm or less and has a solubility in the intestinal tract and an immediate effect.
The iron content, which is extremely abundant as 0 mg, can be reliably absorbed and ingested in the intestinal tract, and as a result, the iron based on the physiology of women, especially for strengthening bones, regulating intestines and bowel movements, normalizing blood pressure, etc. It is remarkably effective as a deficient health food for supplementation.

On the other hand, the fact that the carbohydrates and lipids are suppressed to a low level is useful for preventing diabetes. Among seaweeds, which are abundant iron sources, seaweed, seaweed, kelp, etc. are different from hijiki and have too high a water absorption rate. The absorption rate inside is poor, and it is not possible to expect the intake of its nutritional value.

Further, since the powdered hijiki (P) of the present invention has been finished to a fine powder having an average diameter of about 10 μm or less, it can be directly eat and drink as the above health food, and can be used as a paste product, soups, noodles, etc. As a material for various processed foods, it can be mixed and used by kneading, sprinkling, coating or the like. This is because they are excellent in compatibility in the mixed state, dispersibility in liquid, water retention and the like. In this case, the finer the powder, the more stable the coloring of the wick and the more effective it is in preventing color fading, so that it is possible to obtain a food material having no variation or unevenness in each production area.

[0062]

As described above, the powdered hijiki (P) of the present invention has a constitution, in which dried hijiki, which is a crushing material (M), is immersed in water or hot water, and after removing the water, it is subjected to vacuum conditions. It is a fine powder that is softened by the heating / stirring action and steaming / drying action sequentially applied in the same manner, and subsequently pulverized to an average diameter of about 10 μm or less under cooling conditions, and about 200 mg or more per 100 g as a nutritional component. Since iron is contained, there is an effect that all the problems of the prior art described at the beginning can be solved.

That is, according to the above-mentioned structure of the present invention, the fibrous material of the dried hijiji, which is the crushing material (M), is softened once and then pulverized to an average diameter of about 10 μm or less. Therefore, unlike commercially available dried hijiki, it exhibits solubility in the intestinal tract, and even elderly people and infants with bad teeth can surely absorb and ingest the nutrients contained in the intestine. As a result, it is useful as a health food that can be eaten and consumed as it is, and as a material that can be widely mixed and used in pasty products, noodles, soups, other various processed foods, soups, hamburgers, agar, and other various foods cooked at home. It is.

In particular, the powdered hijiki (P) of the present invention is characterized in that the iron content of minerals is about 200 mg or more per 100 g,
Because it contains a large amount, in combination with the fine powder that can exhibit the solubility and immediate effect in the intestinal tract, normalization of bowel control and bowel movement and blood pressure, rheumatism, osteoporosis, etc.
It has a remarkable effect on replenishment of iron based on the physiology of especially women,
It can be widely used as a regular medicine at home.

As a method for producing the powdered hiji (P), in the present invention, dried hijiji, which is a crushing material (M), is immersed in water or hot water for a certain period of time, and after the water is removed, the mixer (A) is stirred. Into the tank (11) and the stirring tank (1)
Under the vacuum conditions covered in 1), the heating and stirring action and the steaming and drying action are successively applied to the crushing material (M) in order to reduce the fiber content to about 10% or less. The crushed material (M) in a softened and dried state is continuously transferred into a grinding tank (33) of a ball mill (B),
Under the cooling condition of about 35 ° C or less by the cooling water, the powder is pulverized into fine powder having an average diameter of about 10 microns or less. Of course, no (bitterness) is produced, and there is no risk of the nutritional components being destroyed.

Further, the heating / stirring action and the steaming / drying action on the crushing material (M) can be automatically and continuously imparted by the same stirring tank (11). Excellent in mass production effect.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view of a mixer used for producing powdered hijiki according to the present invention.

FIG. 2 is a side sectional view showing the stirring tank of FIG. 1 in an extracted manner.

FIG. 3 is a plan view showing an open state of the stirring tank.

FIG. 4 is a side sectional view of a rotary ventilation ball mill used for producing powdered hijiki according to the present invention.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

[Explanation of symbols]

 (11) ・ Stirring tank (12) ・ Cable heater (13) ・ Rotating blade shaft (14a) ・ Rotating stirring blade (14b) ・ Rotating stirring blade (19) ・ Opening / closing lid (23) ・ Cable heater (24) ・ Fixed Stirring blade (25), temperature detection sensor (28), vacuum pump (33), grinding tank (34), ball (35), cooling jacket (36), air pump (38), product discharge path (39), ball catching Screen (42) ・ Crushing hopper (43) ・ Rotating blade shaft (48) ・ Screw blade (49) ・ Disc-type dispersion blade (A) ・ Mixer (B) ・ Ball mill (M) ・ Crushing material (dried hijiki) ) (P) ・ Hijiki (product)

Claims (2)

(57) [Claims] 1. Dried hijiki, which is to be a crushing material (M), is immersed in water or hot water, and after removing the water content, is softened by heating / stirring action and steaming / drying action sequentially applied under vacuum conditions. It is a fine powder crushed to an average diameter of about 10 microns or less under cooling conditions, and 100
Powdered hijiki characterized by containing about 200 mg or more of iron per gram. 2. Dried hijiki, which is a crushing material (M), is immersed in water or hot water for a certain period of time, and after draining the water, it is poured into a stirring tank (11) of a mixer (A). 1
Under the vacuum conditions covered in 1), the heating and stirring action and the steaming and drying action are successively applied to the crushing material (M) in order to reduce the fiber content to about 10% or less. The crushed material (M) in the softened and dried state is continuously transferred into the crushing tank (33) of the ball mill (B) and cooled under the cooling condition of about 35 ° C. or less by the cooling water. Pulverizing into fine powder having an average diameter of about 10 microns or less.