JP2716943B2 - Crushed sand production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing crushed sand by crushing rocks collected from mountains and rivers.

[0002]

2. Description of the Related Art In Japan, natural sand is scarce, and rocks collected from mountains and rivers are crushed to produce crushed sand.

There are two methods for producing such crushed sand, namely, wet crushed sand production and dry crushed sand production.

In the wet crushed sand production, as shown in FIG. 3 , raw ore supplied from a raw material hopper (1) by a feeder (2) is fed into a sieve (3) by a belt conveyor or the like, and washed with water. Using a sieve mesh suitable for the grain size of the sand, the sand is separated into crushed materials that are coarser than the sand, and the sand under the sieve is put together with water into a wet classifier (4). The coarser crushed material is put into a wet sand making machine (5) and pulverized while being mixed with water, and this crushed material is mixed with water into the sand under a sieve screen selected by a sieve machine (3). Put into a wet classifier (4), classify it into crushed sand and muddy water while mixing with water in this wet classifier (4), carry out the crushed sand as a product and store it in a suitable place, and treat the muddy water with muddy water Carry in equipment for processing.

As shown in FIG. 4 , in the dry sand crushing method, raw stones quantitatively supplied from a raw material hopper (6) by a feeder (7) are put into a dry sand maker (8) by a belt conveyor or the like and pulverized. Then, the pulverized material is put into a sieve (9), and separated into sand and regrind coarser than the sand by a sieve mesh suitable for the particle size of the sand. It is put into a sand machine (8) and pulverized, and the sand under the sieve mesh is put into a dry classifier (10) and classified into crushed sand and fine powder.
The crushed sand, which is the product, is carried out and stored in the right place, and the fine powder is also effectively used as an additive such as asphalt mixture, so it is carried out and stored in the right place.

[0006]

However, the above-mentioned wet crushed sand production and dry crushed sand production have the following problems.

[0007] The wet crushed sand production is uneconomical because a large amount of water is required for sorting, sand making and classification, because it requires mixing with water. Further, since the muddy water classified by the wet classifier (4) must be treated in a large amount, the muddy water treatment equipment requires a large amount of equipment cost and running cost, which increases the production cost of the crushed sand and increases the muddy water. The processing equipment becomes large, and the space cannot be effectively used. In addition, in recent years, the treatment itself of the dewatered cake subjected to muddy water treatment by a recycling method or the like has become a problem, and this treatment requires considerable expense, which further increases the production cost of crushed sand.

[0008] Unlike the wet method, dry crushed sand production does not require the cost of treating fine powder, it is easy to treat fine powder because it is dry, and the fine powder can be effectively used as asphalt mixture. However, since the effect of rough water is large, sufficient water management is required.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method and apparatus for producing crushed sand capable of producing crushed sand of stable quality at low cost.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a raw material hopper for stocking rough stones, a feeder for supplying raw stones quantitatively from the raw material hopper, and a raw material quantitatively supplied by the feeder. a primary crusher to split a primary coarse sieve machine for sorting coarse split has been crushed by the primary crusher to the crushed and fine crushed have rough sorting in the primary coarse sieve machine The finely crushed material thus obtained is separated into sand and crushed material coarser than sand while mixing with water, and the crushed material coarser than sand is mixed with the coarse crushed material selected by the primary sieve coarser 1 A secondary fine sieve, a wet classifier that classifies sand classified by the primary fine sieve into water and a crushed sand and a muddy water while mixing with water, and a coarse pulverizer selected by the primary coarse sieve. And crushed material that is coarser than the sand sorted by the primary fine sieve A secondary crusher for splitting, a primary dry sand crusher for crushing the crushed material crushed by the secondary crusher, and a crushed sand and crushed sand for the crushed material crushed by the primary dry sand crusher Sorted into a slightly coarser reground material and a reground material that is significantly coarser than the crushed sand, and the crushed sand is mixed with the crushed sand classified by the wet classifier, and the reground material that is significantly coarser than the crushed sand is again produced by the primary dry process. A secondary sieve machine to be put into a sand machine, and the regrind, which is slightly coarser than the crushed sand selected by the secondary sieve machine, is further finely pulverized, and
Classified by the wet classifier together with the sorted sand
The present invention also provides a crushed sand production device, which comprises a secondary dry sand maker for mixing with crushed sand.

Further, as the feeder, a raw material hopper is used.
It has a sorting function that sorts rough into coarse and fine rough.
To supply the selected rough rough to the primary crusher.
Using a grizzly feeder and the grizzly feeder
Of fine gemstone supplied and sorted in
And crushed material and supply the sand to the wet classifier
Sieving machine and crushed material selected by the sieving machine
Crushed, and the crushed material
And a wet sand maker for mixing with the wet classifier and supplying the mixture to the wet classifier.
You may get.

[0012]

According to the present invention, an ore is crushed by a primary crusher,
The crushed material is separated into sand and crushed material by a primary sieve machine,
While classifying sand into crushed sand and muddy water with a wet classifier,
The pulverized material is subjected to a secondary crusher, a primary dry sand maker, a secondary sieve
And the secondary dry sand making machine to produce crushed sand and the above wet classifier
Since it is mixed with the crushed sand that has been classified, the amount of water used can be drastically reduced compared to conventional wet crushed sand production, and the amount of muddy water that is classified by the wet classifier is extremely small, and the generation of dewatered cake The amount is also very small.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a flow chart showing a first embodiment of an apparatus for implementing the method for producing crushed sand of the present invention.

In FIG. 1, (11) is a raw material hopper for stocking rough stones collected from mountains, rivers, etc., (12) is a feeder for supplying a constant amount of raw material from the raw material hopper (11), and (1).
3) is a primary crusher that roughly divides the ore supplied by the feeder (12), and (14) is a crushed material that is roughly crushed by the primary crusher (13). The primary sieving machine (15) separates the fine crushed material under the sieve screen selected by the primary sieving machine (14) into sand and crushed material that is coarser than sand while mixing with water. Primary sieving machine to sort into
(16) is a wet classifier that classifies sand and muddy water while mixing the sand under the sieve screen selected by the primary fine sieve (15), and (17) is a primary coarse sieve ( An intermediate hopper that stocks the coarse crushed material on the sieve screen sorted in 14) and the coarser crushed material than the sand on the sieve screen sorted in the primary fine screener (15), and (18) is an intermediate hopper A feeder that supplies the crushed material from (17) quantitatively, and (19) a feeder (1
A secondary crusher for finely dividing the crushed material supplied in 8), (20) a primary dry sanding machine for crushing the finely divided material in the secondary crusher (19), (21) ) Is a secondary sieve that sorts the crushed material crushed by the primary dry sand making machine (20) into crushed sand, reground material slightly coarser than crushed sand, and reground material extremely coarser than crushed sand. This is a secondary dry sanding machine that crushes the reground material slightly coarser than the crushed sand on the fine sieve screen selected by the next sieve machine (21).

Next, the procedure for producing crushed sand will be described.

First, the ore supplied quantitatively by the feeder (12) from the raw material hopper (11) is converted into a primary crusher (13).
And coarsely divided. Next, the coarsely crushed material is put into a primary coarse sieving machine (14), and is separated into a coarse crushed material and a fine crushed material by a relatively coarse sieve net. Next, the coarse crushed material on the screen of the primary coarse sieving machine (14) is put into the intermediate hopper (17), and the fine crushed material under the screen of the primary coarse sieving machine (14) is removed from the screen by one. The mixture is fed into a next fine sieve (15), and mixed with water, and then separated into sand and crushed material coarser than sand by a sieve mesh suitable for the particle size of the sand.
Next, the crushed material that is coarser than the sand on the screen of the primary fine screen (15) is mixed with the coarse crushed material on the screen of the primary screen (14), and is mixed into the intermediate hopper (17). At the same time, the sand under the sieve mesh of the primary fine sieve (15) is fed into a wet classifier (16) and classified into crushed sand and muddy water while being mixed with water. Thereafter, the crushed sand classified by the wet classifier (16) is carried out and stored in an appropriate place, and muddy water is carried into a muddy water treatment facility for treatment.

On the other hand, the coarse crushed material and the crushed material which is coarser than the sand fed into the intermediate hopper (17) from the primary coarse sieving machine (14) and the primary fine sieving machine (15) are removed from the intermediate hopper (17). From the feeder (18) to feed it into the secondary crusher (19), and divide it into small pieces that can be put into the primary dry sanding machine (20). Next, the finely divided crushed material is put into a primary dry sand making machine (20) to be pulverized, and the pulverized material is put into a secondary sieve (21) to be a fine sieve suitable for the particle size of the sand. Using a net and a sieve that is coarser than the grain size of the sand, the material is sorted into sand, a regrind slightly coarser than the sand, and a regrind coarser than the sand. Next, the reground material, which is significantly coarser than the sand on the coarse screen of the secondary sieve (21), is again charged into the primary dry sand making machine (20) for grinding, and the secondary sieve (21) ) The finely crushed material, which is slightly coarser than the sand on the fine sieve net, is put into the secondary dry sand making machine (22) and further finely crushed, and the crushed material is placed under the fine sieve mesh of the secondary sieve machine (21). Mixed with the crushed sand classified by the wet classifier (16) together with the sand content of (1) and transported to the appropriate place.

As described above, the apparatus according to the present invention comprises a raw material hopper.
-Rough ore supplied from (11) by feeder (12)
Is coarsely divided by a primary crusher (13),
Sand and powder with a screen machine (14) and a primary screen machine (15)
Crushed sand and muddy water using a wet classifier (16)
And pulverized material into a secondary crusher (19), 1
Secondary dry sand making machine (20), secondary sieve machine (21) and secondary drying machine
The wet classifier (16), which is made into crushed sand by a sand maker (22)
In order to mix with the crushed sand classified in the above, the amount of water used can be significantly reduced compared to the conventional wet crushed sand production,
The amount of muddy water classified by the wet classifier is extremely small, and the amount of dewatered cake is extremely small.

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

FIG . 2 shows a second embodiment of the device of the present invention.
This is obtained by changing the feeder (12) of the first embodiment shown in FIG. 1 to a grizzly feeder (43) having a sorting function.
The same reference numerals as those in FIG. 1 indicate the same components. this
In the embodiment , the hopper (11) is connected to the grizzly feeder (4).
According to 3), the raw ore is sorted and supplied into a coarse ore and a fine ore in a constant amount, and the coarse ore is put into a primary crusher (13) to produce crushed sand in the same manner as in the first embodiment, and at the same time, to produce a fine crushed sand. The rough is put into a sieving machine (44) and is separated into coarse and fine by a relatively coarse sieve net, and the coarse ore on the sieve of the sieve (44) is separated into an intermediate hopper (1).
7) Secondary crusher (19), primary sand maker (20)
It is made into crushed sand by a secondary sieve (21) and a secondary dry sand maker (22). On the other hand, the fine ore under the screen of the sieving machine (44) is put into the sieving machine (45) and mixed with water. And the sand under the screen of the sieving machine (45) is put into the wet classifier (16), and the raw material that is coarser than the sand under the screen of the sieving machine (45) is wet-sanded ( The mixture is pulverized while mixing with water and pulverized while being mixed with water. Then, the mixture is fed into a wet classifier (16) together with the sand fractionated by a sieve (45) to be classified into crushed sand and drunk. .

[0028]

As described above, according to the present invention,
Water consumption can be significantly reduced compared to conventional wet crushed sand production, and it is extremely economical.At the same time, the amount of muddy water that is classified by the wet classifier is small and muddy water can be treated with a small muddy water treatment facility. In addition, the amount of dewatered cake generated is small, and the disposal cost can be reduced. Therefore, the production cost of the crushed sand can be reduced.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing a second embodiment of the present invention.

FIG. 3 is a flowchart showing a conventional wet crushed sand production.

FIG. 4 is a flowchart showing a conventional dry-crushed sand production.

[Explanation of symbols]

11 Raw material hopper 12 Feeder 13 Primary crusher 14 Primary coarse sieve 15 Primary fine sieve 16 Wet classifier 17 Intermediate hopper 18 Feeder 19 Secondary crusher 20 Primary dry sand maker 21 Secondary sieve 22 2 Next dry sand making machine 43 Grizzly feeder 44 Fruy machine 45 Fruy machine 46 Wet sand making machine

Claims (2)

(57) [Claims] 1. A raw material hopper for stocking raw stones, a feeder for supplying raw stones quantitatively from the raw material hopper, a primary crusher for roughly dividing the raw materials supplied quantitatively by the feeder, and a primary crusher for the primary crusher. a primary coarse sieve machine for sorting coarse split has been crushed into a crushed and fine crushed material had rough Te, and the fine pulverized product was screened in the primary coarse sieve machine hydro mixed乍Ra sand fraction A primary fine sieve that mixes the crushed material coarser than the sand with the coarse crushed material selected by the primary sieve; A wet classifier for classifying the selected sand into crushed sand and muddy water while mixing with water, a coarse pulverized material selected by the primary coarse sieve and
A secondary crusher that crushes the crushed material coarser than the sand selected by the secondary sieving machine, a primary dry sand maker that crushes the crushed material that is crushed by the secondary crusher, The crushed material crushed by the primary dry sand maker is separated into crushed sand, crushed sand that is slightly coarser than crushed sand, and crushed sand that is significantly coarser than crushed sand, and the crushed sand is mixed with the crushed sand classified by the wet classifier. to together, a secondary sieve machine put into unduly coarse regrind was again the primary dry made sand machine than crushed sand, and further finely ground somewhat coarser regrind material from sorted crushed sand in the secondary sieve machine Sorting by the secondary screen machine
Crushed sand classified by the wet classifier together with the crushed sand
And a secondary dry sand maker for mixing the crushed sand. 2. The feeder has a sorting function of sorting raw ore raw hoppers into coarse ore and fine ore,
While using a grizzly feeder for supplying the sorted rough ore to the primary crusher, fine ore sorted and supplied by the grizzly feeder is separated into sand and crushed materials while being mixed with water, and the sand is separated. A sieving machine to be supplied to the wet classifier; crushed materials crushed by the sieving machine; crushing the crushed materials with sand sorted by the sieving machine; and supply to the wet classifier. The apparatus for producing crushed sand according to claim 1, further comprising a wet sand maker.