JPS5852904Y2 - Cake processing equipment in crushed stone production - Google Patents

Description

[Detailed explanation of the invention] This invention uses lime stabilization treatment, which uses fine powder (hereinafter referred to as cake) as the main component, which is extracted from crushed stone by washing, precipitating, and squeezing in the process of manufacturing crushed stone from rocks, etc. Concerning equipment for manufacturing construction materials.

Recently, the demand for crushed stone has increased and a large amount of crushed stone is produced.
When crushed rocks are washed during the crushing stone manufacturing process, a large amount of waste water is generated, which used to be drained into rivers, but now the washing water is re-hydrated using washing equipment.
Fine-grained soil contained in the wash water is precipitated in a subsequent sedimentation tank, sent to a compressor such as a filter press, dehydrated, and disposed of.

When the fine-grained soil produced in the crushed stone manufacturing process dries, it is scattered into the air by the wind, and when the moisture content increases, it becomes muddy, and even if the surface is dry, the bottom layer is still wet, so it is also considered waste.
Disposal locations are limited and disposal costs are also large.

Furthermore, when crushing stone, a considerable amount of crushed stone containing crushed stone waste with a relatively small particle size is generated compared to good quality crushed stone.

It has been known that quicklime or slaked lime is effective as a soil improvement agent, and it is conceivable that the fine particles produced during the crushed stone manufacturing process may be solidified using conventional methods and conventional mixing ratios. However, in the conventional method, it is necessary to use an extremely large amount of lime, which poses an economical problem.

The purpose of this invention is to provide an apparatus for producing an economical improved construction material whose main component is fine-grained soil generated in the process of producing crushed stone.

This invention places a main belt conveyor under a hopper equipped with a delivery belt conveyor for storing a plurality of main materials, followed by a cement supply hopper, a quicklime supply hopper, and a discharge end of the main belt conveyor. It is equipped with a round material feeding device and a kneading machine below it, and the hopper that stores the main material does not have a gate at the bottom and opens in line with the belt conveyor. It is provided with a support roller.

The cake processing device for producing crushed stone according to this invention will be described below.

FIG. 1A and FIG.

A main conveyor 1 driven by a variable speed electric motor 2 in the direction of the arrow in the figure is installed upright over almost the entire length of the device.
Hoppers 4a, 4b, 4C are supported by machine frames 3a, 3b, 3C that straddle the main conveyor 1, and belt conveyors 5a, 5b for delivery are located below the lower opening.

5C are driven by variable speed electric motors 6a, 6b, and 6C in the directions of arrows shown in the figure, respectively.

A hopper 7 for cement is arranged next to the hopper 4C, and a delivery conveyor 9 such as a screw conveyor equipped with a variable speed motor 8 is connected below the hopper 7 to send cement to the main conveyor 1. ing.

Following the hopper 7 for cement, a hopper 12 for storing quicklime as a soil stabilizing material is placed in the machine frame 11 across the main conveyor 1.
is supported, and the outlet of the hopper 12 is connected to the variable speed electric motor 1.
It opens onto the main conveyor 1 via a rotary feeder 14 driven by a rotary feeder 14.

The main conveyor 1 is tilted upwards from the hopper 12 for loading, the rising end is supported by the frame 15, and the hopper 16
It has reached the upper opening.

The hopper 16 opens to the inlet of a secondary crosstalk machine 17 supported by the frame 15, and the hopper 16 has an emulsion supply device 1.
8 is open.

A hopper 19 is provided between the exits of the secondary crosstalk machine 17, and can be loaded onto a truck 21.

The hoppers 4a, 4b, 4C and their delivery mechanisms are the same and are shown in FIG. 2, which is an enlarged sectional view parallel to the paper plane of FIG. 1A.

In FIG. 2, these are explained by reference numerals without subscripts.

Figure 3 shows the hoppers 4a, 4b, 4C in Figure 1A.
FIG.

The lower part of the hopper 4 has an opening that is slightly narrower than the width of the belt 22 of the belt conveyor 5, and a gate 23 is provided on the side in the direction of movement of the belt 22.
is wound between a rotatable pulley 25 supported by the machine frame 3 (not shown in FIG. 2) and a pulley 26 driven by a variable speed electric motor 6, and a freely rotatable pulley 26 is supported by the machine frame 3 (not shown in FIG. 2). rollers 27 are closely arranged in parallel.

In other words, the weight of the objects stored in the hopper 4 is directly transferred to the belt 22.
The gravity is applied to the rollers 27 which are closely arranged in parallel via the belt 22.

Therefore, the structure below the hopper 4 is simpler than the conventional hopper, which had a delivery device between it and the belt conveyor to prevent the weight of the contents inside the hopper from being directly applied, and the delivery amount does not change the conveyor speed. There are features that can be obtained more accurately.

Although not shown in the figure, the cake is mixed with a small amount of quicklime before the cake processing device of this invention is used, and the cake is left for a period of time to reduce its water content, aggregate, and reduce its plasticity index so that it can be crossed by a machine. For example, it is put into the hopper 4a.

Crushed stone chips are put into the hopper 4b, and a substance that promotes solidification, such as fly ash, is put into the hopper 4C.

For example, Clean Set (trade name) for soil improvement is placed in the hopper 7, and quicklime is placed in the hopper 12.

The main conveyor 1 is operated and the belt conveyor 5a.

5b and 5C are operated at controlled speeds to obtain the required blending ratio.

For example, when trying to obtain soil material for the ground, only the belt conveyor 5a is operated.

In the case of 49% cake and 49% crushed stone waste for roadbed or roadbed, belt conveyors 5 a and 5 b are operated at the same time.

Furthermore, the same operation is carried out in cases where 48% cake and 48% crushed stone waste are used.

Main materials such as cake, crushed stone chips, and fly ash that have fallen onto the main conveyor 1 from the ends of the belt conveyors 5a, 5b, and 5c are sent in the direction of the arrow shown in the figure, and when they reach the bottom of the hopper 7, they are rotated by a variable speed electric motor 8. As shown in the third example, the cement delivered by the delivery conveyor 9 is delivered at a weight ratio of 2%.

In other examples, the variable speed electric motor 8 is stopped.

The main material further conveyed from below the hopper 7 by the main conveyor 1 is added with quicklime supplied by the rotary feeder 14 from the hopper 12.

The amount is 2% by weight on each side.

A solidifying agent and a stabilizer are added to the main material on the main conveyor 1,
At the same time as the emulsion is fed into the hopper 16, the emulsion is supplied by the emulsion supply device 18, and is fed into the secondary mixer 17, where it is kneaded.

The kneaded lime-stabilized construction material is loaded onto a truck 21.

As mentioned above, according to the cake processing device for producing crushed stone of this invention, it is possible to mix cake, crushed stone waste, fly ash, etc. in an appropriate ratio, and it is also possible to add quicklime, cement, etc. in the required amount accurately, and it is possible to continuously It can perform secondary crosstalk and be loaded onto a truck, making it suitable as a central processing unit for processing large quantities of cakes, etc.

The mechanism for feeding and discharging main materials such as cake, crushed stone, and fly ash has a sufficiently large opening at the bottom of the hopper, and the belt conveyor is essentially a roller conveyor that transports powder and granules downward. This prevents the hopper from falling, and the parallel rollers are suitable for supporting the weight of the hopper contents.
Since the conveyor directly delivers the contents, the contents are delivered accurately.
Since the opening at the bottom of the hopper is large, bridging is unlikely to occur.

[Brief explanation of the drawing]

FIG. 1B is a side view of an embodiment of the invention, FIG. 2 is an enlarged sectional view of a portion of FIG. 1 parallel to the plane of paper, and FIG. 3 is a partial plan view of FIG. 1. 1... Main conveyor, 2... Variable speed electric motor, 3a, 3b, 3C... Machine frame, 4, 4 a
, 4 b, 4 C・・・・・hopper, 5,5a,
5 b, 5 c..., belt conveyor, 5a
, 5b, 6C...variable speed electric motor, 7...
・Hopper, 8...Variable speed electric motor, 9...
・Delivery conveyor, 11...Machine frame, 12...
...Hopper, 13...Variable speed electric motor, 14.
...Rotary feeder, 15...Frame,
16...hopper, 17...secondary kneading machine, 18...round material supply device, 19...hopper, 21...truck, 22...Belt, 23...Gate, 25,26...
・Pulley, 27...Roller.

Claims (1)

[Scope of utility model registration request] 1. A plurality of storage and supply hoppers for primary materials such as cake and crushed stone waste are arranged on the main conveyor in the direction of movement of the main conveyor, followed by storage and supply hoppers for cement and quicklime, and the resulting soil material loading position A round material feeding device is installed at the conveyor terminal with a height increased so that A cake processing device in the production of crushed stone, in which each feeding hopper is equipped with an adjustable metering feeding device at the bottom. 2. The lower opening of the storage and supply hopper for the main material is long and open along the belt conveyor, the conveyor belt is arranged closely to the opening, and the lower end wall of the hopper on the exiting side of the conveyor belt is provided with a discharge port. , and the conveyor is stretched over the upper side and rotatable rollers are attached closely in parallel to support the lower surface of the belt, so that the weight of the material in the hopper is directly carried by the conveyor. A cake processing device for producing crushed stone as claimed in claim 1.