JPH049120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for treating a dewatered cake of waste mud generated in crushed stone manufacturing equipment and the like.

[Conventional technology]

Sludge water produced when crushed stone is washed with water during the manufacturing process of crushed stone manufacturing equipment is subject to legal regulations and cannot be discharged directly into rivers. It was dumped at a disposal site. However, as it is often difficult to secure a disposal site, in some cases, in order to make effective use of the cake, the dehydrated cake is stabilized by mixing quicklime into it, and then mixed with particle size-adjusted crushed stone, etc. to be used as road base material. There are examples of it being used as a construction material. As shown in FIG. 2, this processing device supplies a cake obtained by dewatering waste mud with a filter press 1 to a first conveyor 2,
Quicklime is quantitatively cut out from the quicklime silo 3 onto this first conveyor 2 by a rotary feeder 4. After the cake and quicklime are put into a paddle mixer 5 and mixed, they are transported by a second conveyor 6 and processed into a cake 7.
stored as.

[Problem that the invention seeks to solve]

Dehydrated cake has a high moisture content and is composed of clay and silt, so it has strong adhesion, so in order to mix it with particle size-adjusted crushed stone, etc., the moisture content must be 20% or less, and it must be sufficiently crushed and sized. However, in the conventional treatment, the amount of quicklime mixed in was about 5% of the dehydrated cake, resulting in poor crushability and insufficient granulation. Therefore, if the amount of mixed lime is increased in order to improve this problem, there is a problem that the processing cost increases because the conventional equipment mixes only quicklime.

SUMMARY OF THE INVENTION An object of the present invention is to provide a treatment device for waste mud from quarry manufacturing equipment, which reduces the amount of quicklime mixed in, reduces treatment costs, and improves crushability and particle sizing.

[Means for solving problems]

The processing device for quarry manufacturing equipment waste mud of the present invention includes a filter press that dewaters the quarry manufacturing equipment waste mud, and an auxiliary agent supply device that supplies a crushing auxiliary agent to a cake obtained by dewatering the quarry manufacturing equipment waste mud by the filter press. , a primary crusher for crushing a cake supplied with a crushing aid;
A quicklime supply device supplies quicklime to the cake crushed by the primary crusher, a secondary crusher mixes and crushes the cake supplied with quicklime, and further cracks the cake crushed by the secondary crusher. It is equipped with a tertiary crusher for crushing and sizing.

[Effect]

In the treatment device of this invention, waste mud from quarry manufacturing equipment is dehydrated by a filter press and turned into a cake.
Quicklime is added to the dehydrated cake that is supplied with a crushing aid and crushed in the primary crusher, crushed in the secondary crusher, and further crushed and sized in the tertiary crusher. By mixing in the crushing aid, the moisture content of the cake is reduced and crushing and sizing are carried out sufficiently, so the chemical reaction between the quicklime and the cake takes place effectively, and the amount of quicklime used can be kept to a minimum. .

〔Example〕

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

FIG. 1 is an explanatory diagram showing the configuration of a dehydrated cake processing apparatus according to an embodiment of the present invention. This processing equipment includes a filter press 11, a primary crusher 15,
A secondary crusher 17 and a tertiary crusher 22 are arranged in sequence, and these are connected to the first conveyor 12 and the second conveyor 1.
6. They are connected by the third conveyor 18, and the auxiliary agent silo 13 and the rotary feeder 1 are placed on the first conveyor.
A quicklime supplying device consisting of a quicklime silo 20 and a rotary feeder 21 is installed on the second conveyor. 23 is a fourth conveyor that transports the processed cake 19.

A filter press 11 that dewaters waste mud water to form a cake supplies the cake of lumpy solids obtained by dewatering here to the first conveyor 12. A fixed amount (20 to 30% of the cake amount) of the crushing aid is cut into the cake on the first conveyor 12 by the rotary feeder 14, and the cake to which the crushing aid has been supplied is transferred to the primary crusher 15. will be put into the It is desirable that the crushing aid be dried fine particles that are inexpensive, and in this embodiment, stone powder obtained by collecting dust generated in crushed stone production equipment with a dust collector is used. This is a dry powder mainly composed of SiO ₂ , which had no usable value and was discarded at a processing site. The primary crusher 15 is a disk rotary crusher, and crushes the cake into pieces of about 100 mm.
This cake is fed to the second conveyor 16 and
Rotary feeder 21 to cake on conveyor 16
Quicklime is cut out in a fixed amount (2 to 3% of the cake amount), and the cake supplied with quicklime is sent to the secondary crusher 17.
will be put into the The secondary crusher 17 is a paddle-type mixing crusher, which sufficiently mixes quicklime and cake and crushes them. This cake is supplied to the third conveyor 18, transported, and thrown into the tertiary crusher 22.
The tertiary crusher 22 is a rotary shearing type crusher, and final crushing is performed here to reduce the cake to particles of 25 mm or less with quicklime and stone dust attached to the surface. The sized particles are transported by the fourth conveyor 23 and stored as a processed cake 19.

This treated cake is mixed with particle-size-adjusted crushed stone and used as road base material. The cake treated in this example and the particle-size-adjusted crushed stone (M-40) are mixed at a mixing ratio of 2:
The mixture of 8 to 1:9 had a modified CBR (subgrade soil bearing capacity ratio) of 90 to 120%, which fully satisfied the modified CBR of 80% or more for the upper subbase material according to the pavement guidelines.

〔Effect of the invention〕

Since the treatment apparatus of the present invention has the above-described configuration, the cake is sufficiently crushed and sized, and the amount of quicklime required is the minimum required for the chemical reaction, thereby reducing treatment costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structure of a dehydrated cake processing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing the structure of a conventional dehydrated cake processing apparatus. In the figure, 11 is a filter press, 12 is a first conveyor, 13 is an auxiliary agent silo, 14 is a rotary feeder, 15 is a primary crusher, 16 is a second conveyor, 1
7 is a secondary crusher, 18 is a third conveyor, 19 is a processed cake, 20 is a quicklime silo, 21 is a rotary feeder, 22 is a tertiary crusher, and 23 is a fourth conveyor.

Claims (1)

[Claims] 1. A filter press that dewaters waste mud from quarry manufacturing equipment, an auxiliary supply device that supplies a crushing aid to the cake obtained by dehydration using the filter press, and a cake supplied with the crushing aid. A primary crusher for crushing, a quicklime supply device for supplying quicklime to the cake crushed by the primary crusher, a secondary crusher for mixing and crushing the cake supplied with quicklime, and a secondary crusher for mixing and crushing the cake supplied with quicklime. A processing device for waste mud from quarry manufacturing equipment, which is equipped with a tertiary crusher that further crushes and granulates the crushed cake.