JPH0257991B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for dewatering ore or sand using a double-tank spiral classifier.

The conventional dewatering method using a spiral classifier and its device are as follows: Raw materials and water are put into a tilted classification tank, and the scraped food classified by the spiral classifier is scraped up into the upper classification tank. A vibrator attached to the bottom of the machine vibrates the scraped food to promote dehydration, but since the ratio of scraped food in the spiral cross section is large, there is no drainage channel for the dehydrated water, and the scraped food is separated from the scraped food. Not only is it impossible to reduce the moisture content of the product as the product is discharged to the outside from the product outlet, but also the method of attaching a screen to the bottom for dehydration causes the screen to be clogged with fried materials, making dehydration impossible. There were also many.

This invention involves putting raw materials and water into an inclined first classification tank, scraping the scraped food into a second classification tank using a small-diameter spiral, and applying vibration to the scraped food using a vibrator in the second classification tank. In addition, the large diameter spiral provided in the second classification tank reduces the ratio of the fried oysters to the spiral cross section to facilitate drainage, and the large diameter spiral at the top of the second classification tank makes it easier to drain the oysters. The above-mentioned drawbacks have been solved by a dewatering method and device using a double-tank spiral classifier, in which the product is scraped up in a spiral and taken out from the product outlet as a product.

The double tank spiral classifier used in this invention will be explained in detail based on the drawings.

Spiral shaft 2 of double tank spiral classifier main body 1
A small-diameter spiral 3 and a large-diameter spiral 4 of appropriate lengths are sequentially disposed in the space. A first classification tank 5 inclined to match the length of the small-diameter spiral 3 and a second classification tank 6 inclined to match the length of the large-diameter spiral 4 are formed, respectively. Reference numeral 7 designates a vibrator for imparting vibration to the scraped food, and reference numerals 8 and 9 designate vibration-proofing materials to prevent vibrations from the vibrator 7 from being transmitted to the first classification tank 5 and the double-tank spiral classifier main body 1. The vibration isolating material 8 connects the first classification tank 5 and the second classification tank 6. 10 is an overflow water outlet;
11 is a raw material input port for inputting raw materials and water;
2 is a water inlet for adding water again, and 13 is a product outlet for the dehydrated scraped food 14.

Next, the dehydration method of the present invention will be explained in detail.

First, when raw materials and water are introduced through the raw material input port 11, the raw materials are classified by the small-diameter spiral 3 disposed in the first classification tank 5, and the scraped food is sent to the upper second classification tank 6 by the small-diameter spiral 3. Being stir-fried. The scraped food 14 sent into the second classification tank 6 is mixed with the water supplied from the water inlet 12 into the second classification tank 6.
It is classified by a large-diameter spiral 4 disposed in the classification tank 6, and at the same time is vibrated by a vibrator 7 attached to the second classification tank 6 to become a consolidated state.
The water inside the scraped food 14 is floated. Furthermore, since the large-diameter spiral 4 has a larger scraping capacity than the small-diameter spiral 3, the ratio of the scraped material to the cross section of the spiral becomes smaller, creating a drainage channel, and the dehydrated water is discharged to the lower part of the second classification tank 6. The water is sent from the second classification tank 6 to the first classification tank 5, and is discharged to the outside from the overflow water drain port 10. On the other hand, the dehydrated scraped and fried food 14 is scraped up by the large-diameter spiral 4 and is then scraped up at the product outlet 1.
Collected from 3. Further, by providing the vibration isolators 8 and 9, vibrations caused by the vibrator 7 are prevented from being transmitted to the first classification tank 5 and the spiral body 1.

Since the method and device of the present invention have the above-described configuration, they exhibit the following unique functions and effects.

(a) Since a plurality of classification tanks and spirals of large and small diameters are arranged in one spiral classifier body, extremely efficient and complete classification and recovery of scraped products with low moisture content are possible.

(b) Since the diameter of the spiral is arranged so as to gradually increase, the ratio of the scraped material to the cross section of the spiral becomes small, so that the water dehydrated by vibration can be sufficiently drained. Therefore, by sufficiently lowering the moisture content of the scraped material, there is no risk of water flowing out onto roads or the like during transportation.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an ore or sand dewatering device used in the method of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. FIG. 2 is a sectional view taken along the line BB in FIG. 1 showing a state in which the vibration material 9 is attached. In the figure, 1...Double tank spiral classifier main body, 2...Spiral shaft, 3...Small diameter spiral, 4...Large diameter spiral, 5...First classification tank,
6... Second classification tank, 7... Vibrator, 8, 9... Vibration isolating material, 10... Overflow water outlet, 11...
...Raw material inlet, 12...Water inlet, 13...Product outlet, 14...Kakiage.

Claims (1)

[Scope of Claims] 1 First, raw materials and water are put into a first classification tank and classified by a small-diameter spiral, and then the classified scraped food is passed through a small-diameter spiral into a first classification tank with a larger diameter than the first classification tank at the top. Water is scraped up into a second classification tank, which has steps formed at the bottom of the classification tank and is continuously formed with a vibration isolating material in between, and at that point, water is again introduced and classified using a large diameter spiral. A method for dewatering ore or sand, characterized in that dewatering is performed by applying vibration to the scraped material using the vibrator described above in a second classification tank provided with a vibrator. 2. A small-diameter spiral and a large-diameter spiral are sequentially arranged on the spiral shaft from below, and a first classification tank and a second classification tank are formed in sequence according to the lengths of the small-diameter and large-diameter spirals, and at the same time, the first classification tank is A step part is formed between the bottom of the tank and the second classification tank so that the second classification tank side is located downward, and the first classification tank is used to input raw materials and water, and the second classification tank is used to input water again into the scraped material. A dewatering device for ore or sand, characterized in that a vibration isolator is provided between the classification tanks, and a vibrator and a vibration isolator are attached to the second classification tank.