CN100373012C

CN100373012C - Dry redmud yard drainage method and apparatus

Info

Publication number: CN100373012C
Application number: CNB2004101554468A
Authority: CN
Inventors: 李明阳
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2004-11-15
Filing date: 2004-11-15
Publication date: 2008-03-05
Anticipated expiration: 2024-11-15
Also published as: CN1776118A

Abstract

The present invention discloses a dry red mud yard drainage method and an apparatus thereof. A yard of which the circumference is inclined to the center is used for stacking red mud; a water filtering pipe is fixed on the center of the yard; the bottom of the water filtering pipe is connected with a drainage pipeline; after water in the red mud stacked in the yard enters the water filtering pipe, the water enters the drainage pipeline and is drained out of the yard. The slope surface of a dam of the yard and the bottom of the yard are both provided with leakage preventing layers. Water filtering layers are arranged above the leakage preventing layers. The center of the bottom of the yard is provided with the water filtering pipe of which the bottom is connected with a drainage pipe. Reverse filtering layers are arranged around the outer wall of the water filtering pipe. Perforated water filtering small holes are arranged on the pipe wall of the water filtering pipe. Each reverse filtering layer is formed by the stacking of fine sand, pebble and block stone. The present invention has the advantages of the complete satisfaction of the drainage requirement of a dry red mud yard, convenient construction and maintenance, etc.

Description

The water discharge method of dry method red mud storage yard and device

Technical field:

The present invention relates to a kind of wastewater from red mud of alumina dry method red mud dump and the discharge method and the device of rainwater, belong to the water discharge technology field of dry method red mud storage yard.

Background technology:

Red mud is the waste residue that produces in the alumina producing, it is to begin to explore more red mud disposal options in the domestic newly-built in recent years alumina producer that dry-method red mud is stored up, store up comparison with the wet method that is similar to the reservoir formula in the past, because the red mud water content is lower in the dry method storage yard, the red mud slurry is similar to toothpaste-like, red mud operation measure such as teds in the stockyard by uniform distribution, natural evaporation, plan draining, machinery, and the rapid mummification of red mud is fixed, thereby reduces the risk of wastewater from red mud contaminated environment.

The drainage pattern of dry method red mud storage yard, because of the difference of site topography different.When the place has the single relatively gradient, adopt outer dam drainage pattern; Around the place is during the centroclinal landform of aspect, suitable employing center drainage pattern.The tissue of dry method red mud storage yard central row water system is different from the tissue of existing mine tailing wet method stockyard drainage systems such as (lime-ash) fully, and it should have following function: (1) leaches wastewater from red mud.Drainage system should be able to be stablized draining red mud leakage water, requires drainage system that certain permeability will be arranged, and can stablize filtration to red mud.Because the red mud granularity is thinner, and 95% less than 100um, prevent that again red mud from stopping up drainage system simultaneously.(2) discharge the reservoir area rainfall, reduce the delay of rainwater as far as possible, reduce the rainwater infiltration influence fixed red mud on the red mud surface.(3) should there be certain self-purification capacity in pipe drainage system, is unlikely to silt inefficacy up because of bringing into of red mud.

Because present mine tailing wet methods such as (lime-ash) is stored up technology, the slip water-solid ratio is up to (5～15): 1, the reservoir area is the stockyard that is similar to the reservoir type, the function of its drainage system and requirement are different from the dry method red mud storage yard drainage system, therefore can't satisfy the drainage requirement of dry method red mud storage yard fully and outer dam dewatering installation because of the difference of site topography, hang down the dry method storage yard drainage requirement of landform around can not satisfying between senior middle school.

Summary of the invention:

The objective of the invention is to: a kind of attached liquid and the stockyard rainwater that can effectively discharge red mud in the dry method red mud storage yard is provided, and is convenient to construct and the water discharge method and the device of the dry method red mud storage yard safeguarded, to overcome above-mentioned the deficiencies in the prior art.

The present invention is achieved in that

The water discharge method of dry method red mud storage yard of the present invention: the centroclinal stockyard of aspect was carried out red mud and is stored up around its adopted, around the center fixation in the centroclinal stockyard of aspect the filter pipe that exceeds stack-up-yard ground is arranged, and be connected with drainage pipe in the bottom of filter pipe, after making water contained in the red mud that is deposited in the stockyard enter into the filter pipe that is located at the center, stockyard, enter into drainage pipe again and be discharged from outside the stockyard.

The dewatering installation of dry method red mud storage yard of the present invention, it comprises the centroclinal stockyard of aspect all around that is provided with dykes and dams (1), going up and the bottom in stockyard is equipped with impervious barrier (2) of dykes and dams (1), on impervious barrier (2), be provided with drainage layer (3) to centroclinal interior domatic in stockyard; Bottom centre in the stockyard is provided with interconnective filter pipe (5), is connected with gutter (4) in the bottom of filter pipe (5), and the pipe of filter pipe (5) is risen in the distance of red mud face (7) B, and the value of B is 0.5m～1.0m; Around the outer wall of every filter pipe (5), be provided with loaded filter (6); On the tube wall of filter pipe (5), be arranged with the drainage aperture (8) of perforation; Loaded filter (6) is piled up by fine sand (9), cobble (10) and piece stone (11) and is formed, and fine sand (9) is positioned at the outermost layer of loaded filter (6), and cobble (10) takes second place, and piece stone (11) is positioned at the innermost layer, and it directly piles up on the outer wall of filter pipe (5).

The present invention compared with prior art, it can effectively discharge the wastewater from red mud and the stockyard rainwater of basin type dry method storage yard, simultaneously is unlikely to again red mud is discharged with rainwater, has reduced environment pollution; And can reduce the delay of rainwater on the red mud surface, accelerate the drying of red mud; Simultaneously,, make near the degree of drying of the red mud layer of dykes and dams be higher than other position, stockyard, the ground and the dam material of good mechanical properties is provided for constructing of the sub-dam of upper level because the drainage point is located at the bottom in stockyard.

Description of drawings:

Accompanying drawing 1 is principle of compositionality figure of the present invention;

Accompanying drawing 2 is a structural representation of the present invention.

The specific embodiment:

Embodiments of the invention: at first with the stockyard smooth be around centroclinal type place, basin, aspect reservoir area, after the ground processing and constructing dykes and dams, the bottom in stockyard and dykes and dams (1) on centroclinal interior domatic in stockyard, lay one deck impervious barrier (2) with cement based osmosis type water proofing grout, on impervious barrier (2), lay one deck drainage layer (3), from the center, stockyard, bury gutter (4) in the bottom in stockyard underground, and gutter (4) is extended to outside the dykes and dams (1) with certain gradient; Bottom centre in the stockyard is provided with the filter pipe (5) that has drainage aperture (8), and itself and gutter (4) welded together, at the termination of every filter pipe (5) welding upper flange, filter pipe (5) interconnects with bolt by flange with filter pipe (5), is provided with by fine sand (9), cobble (10) and piece stone (11) to pile up the loaded filter (6) that forms mutually around every filter pipe (5).The caliber of gutter (4), can determine according to weather conditions, reservoir area area etc. with the gradient in stockyard and the caliber of filter pipe (5), every joint length.

To stockyard discharging red mud the time, keep center, red mud layer aspect reservoir area, along with constantly entering of red mud, red mud face (7) can constantly raise, for adapting to the continuous rising of red mud face (7), filter pipe (5) up can be prolonged by flange is a section, the pipe that remains filter pipe (5) is risen in the distance of (7) 0.5 meters～1 meter in red mud face on every side.In not rainfall at ordinary times or when spitting, the attached liquid of rainwater and red mud can be pooled to filter pipe (5) and discharges outside the stockyard by gutter (4) by drainage layer (3) and loaded filter (6).When raining heavyly, when the water level in stockyard arrives the top of filter pipe (5), rainwater promptly enters into filter pipe (5) by the top overflow of filter pipe (5) and outside gutter (4) is discharged the stockyard, this moment rainwater can in the gutter (4) at ordinary times a small amount of red mud of alluvial play the effect of flushing.

Claims

1. the water discharge method of a dry method red mud storage yard, it comprise adopt around the centroclinal stockyard of aspect carry out red mud and store up, it is characterized in that: it around the center fixation in the centroclinal stockyard of aspect the filter pipe that exceeds stack-up-yard ground is arranged, and be connected with drainage pipe in the bottom of filter pipe, after making water contained in the red mud that is deposited in the stockyard enter into the filter pipe that is located at the center, stockyard, enter into drainage pipe again and be discharged from outside the stockyard.

2. the dewatering installation of a dry method red mud storage yard, it comprises the centroclinal stockyard of aspect all around that is provided with dykes and dams (1), it is characterized in that:, on impervious barrier (2), be provided with drainage layer (3) going up and the bottom in stockyard is equipped with impervious barrier (2) of dykes and dams (1) to centroclinal interior domatic in stockyard; Bottom centre in the stockyard is provided with interconnective filter pipe (5), is connected with gutter (4) in the bottom of filter pipe (5), and the pipe of filter pipe (5) is risen in the distance of red mud face (7) B, and the value of B is 0.5m～1.0m; Around the outer wall of every filter pipe (5), be provided with loaded filter (6).

3. the dewatering installation of dry method red mud storage yard according to claim 2 is characterized in that: the drainage aperture (8) that is arranged with perforation on the tube wall of filter pipe (5).

4. the dewatering installation of dry method red mud storage yard according to claim 2, it is characterized in that: loaded filter (6) is piled up by fine sand (9), cobble (10) and piece stone (11) and is formed, fine sand (9) is positioned at the outermost layer of loaded filter (6), cobble (10) takes second place, and piece stone (11) is positioned at the innermost layer, and it directly piles up on the outer wall of filter pipe (5).