JPH0244585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spiral classifier with a stirring tank for classifying sand such as mountain sand to which clay is attached.

Recently, river and terrestrial gravel resources for sand, which is a fine aggregate for ready-mixed concrete, have become scarce, so sand is currently being extracted from sand raw materials containing large amounts of mud and clay.

However, even if a conventional spiral classifier is used, the sand material contains a large amount of mud and clay.
It is difficult to separate the mud and clay attached to mountain sand from the sand. For example, even if a large amount of water and several spiral classifiers are arranged in series to classify them, the classification efficiency is extremely low and it is inefficient. Ta.

This invention solves the above drawbacks by forming in series a first classification tank with a built-in small-diameter spiral, a stirring tank with a built-in small-diameter spiral and stirring blade, and a second classification tank with a built-in large-diameter spiral.

Next, to explain this invention in detail based on the drawings, a small diameter spiral 2 and a large diameter spiral 3 are sequentially attached to the spiral shaft 1, and another stirring shaft 4 is arranged at the lower part of the upper end of the small diameter spiral 2, and the stirring A stirring blade 5 is attached to the shaft 4, and a partition wall 6 is further provided at the upper end to form an inclined stirring tank 7, and an inclined first classification is provided at the location where the small diameter spiral 2 excluding the stirring tank 7 is disposed. A tank 8 and a second classification tank 9 which is inclined at the location where the large-diameter spiral 3 is provided are formed respectively.

10 is a raw material input port for inputting raw materials; 11
12 is the outlet for the classified scraped and fried food; 13 is the outlet for overflow water; 14 is the scraped and fried food; and 15 is the stirring shaft 4.
Water is again poured into the second classification tank 9 through the inlet 11 of the agitated finely divided clay, and the classified oysters 14 are vibrated to compact them and the muddy water floats to the surface and is drained. This is a vibrator used in the second embodiment to further improve classification accuracy.

Next, the operation of the classifier with stirring tank of the present invention will be explained. First, when raw materials and water are inputted from the raw material inlet 10, the raw materials are rotated by the small diameter spiral 2 in which the first classification tank 8 is arranged. After most of the mud is stirred in the water, it is combined with the overflow water at the outlet 13.
More is discharged to the outside.

On the other hand, the scraped material classified in the first classification tank 8 with mud and clay attached is sent to the stirring tank 7 by the small diameter spiral 2, and is massaged by the rotation of the stirring blade 5 disposed in the stirring tank 7. A grinding motion is carried out to form a finely divided mud and clay state. This scraped material containing finely divided mud and clay overflows the partition wall 6 and is sent to the second classification tank 9, whereupon water is again inputted from the water inlet 11 of the second classification tank 9, and a large-diameter spiral is formed. By stirring in step 3, it is classified into mud and sand.

The overflow water containing mud from the second classification tank 9 is discharged to the outside from the outlet 13 of the first classification tank 8 again.

Kakiage 14 classified again in the second classification tank 9
is scraped upward by a large-diameter spiral while dehydrating the muddy water contained in the scraped material 14, and is recovered as a classified product from the discharge port 12.

In addition, when the vibrator 15 shown in FIG. 2 is used, the mud and clay that have been made into fine particles in the stirring tank 7 are vibrated by the vibrator 15 installed in the second classification tank 9, and the mud is brought into a consolidated state and the mud is brought to the surface. It is also possible to collect sand with even higher classification accuracy by floating it and draining it.

Since the present invention has the above-described configuration, it exhibits the following unique functions and effects.

Sand can be classified extremely efficiently to a state free of mud and clay, improving productivity.

Furthermore, since several spiral classifiers are not required, significant cost reductions can be expected in terms of energy and resource savings.

Furthermore, by applying vibration, it is brought into a compacted state and the mud is lifted to the surface and drained, increasing classification accuracy.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the present invention, and FIG. 2 is a front sectional view of another embodiment. In the figure, 1...Spiral shaft, 2...Small diameter spiral, 3...Large diameter spiral, 4...Stirring shaft, 5...Stirring blade, 6...Partition wall, 7...Stirring tank, 8...No. 1st classification tank, 9... 2nd classification tank, 10
...Raw material inlet, 11...Water inlet, 12...Outlet, 13...Outflow, 14...Scrambled food, 1
5...It is a vibrator.

Claims (1)

[Claims] 1. A first classification tank with a built-in small-diameter spiral, a stirring tank with a built-in stirring means consisting of a small-diameter spiral and a stirring shaft with stirring blades formed below the small-diameter spiral, and a second classification tank with a built-in large-diameter spiral. Therefore, the small-diameter spiral and the large-diameter spiral are formed continuously and integrally, and are arranged at an angle, and furthermore, the first classification tank, the stirring tank, and the second classification tank are interposed with a stepped portion and a partition wall between them. 1. A spiral classifier with an agitation tank, characterized in that the second classification tank is equipped with a vibrator.