CN100362173C

CN100362173C - Drainage assembly of dry process red mud stockyard outer dam

Info

Publication number: CN100362173C
Application number: CNB2004100402595A
Authority: CN
Inventors: 刘忠发; 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: 2004-07-16
Filing date: 2004-07-16
Publication date: 2008-01-16
Anticipated expiration: 2024-07-16
Also published as: CN1594759A

Abstract

The present invention discloses a drainage assembly device of dry process red mud stockyard outer dams, which is composed of an outer dam, a leakage preventing layer, a water filtering layer, a diagonal pipe, a dam penetrating pipe and a water filtering pipe, wherein the leakage preventing layer is arranged between the outer dam and the water filtering layer; the diagonal pipe, the dam penetrating pipe and the water filtering pipe are connected by a three-way pipe; the diagonal pipe is diagonally arranged on the bevel of the water filtering layer; an inlet of the water filtering pipe is arranged on the lowest point of the leakage preventing layer; the dam penetrating pipe diagonally penetrates the dam out. The present invention has the advantages of effectively discharging red mud attaching and rain water; simultaneously, red mud can not be discharged along with the rain water; the present invention reduces environmental pollution, reduces the retention of the rain water on the surface of red mud, and accelerates the desiccation and the consolidation of the red mud, etc.

Description

The drain combined assembly on the outer dam of dry method red mud storage yard

Technical field:

The present invention relates to the discharger of a kind of alumina dry method red mud dump wastewater from red mud and rainwater.

Background technology:

Red mud is the waste residue that produces in the alumina producing, at present all is to adopt to store up with the wet method of reservoir formula to handle.Because red mud slip water-solid ratio is up to 5～15: 1, the reservoir area is similar to the stockyard of reservoir type, the function of drainage system and requirement all can't be satisfied the drainage requirement of red mud, and this gives the fixed difficulty of bringing of rapid mummification of red mud, thereby have increased the risk of wastewater from red mud contaminated environment.

The tissue of the drainage system of dry method red mud storage yard 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, prevent from before the dam, to form the pools zone on the red mud surface.The pools zone rainwater infiltrates the red mud layer, and can to influence the dry red mud of lower floor fixed, makes bottom, pools zone red mud water content higher and mechanical property reduces, and is unfavorable for that the straton dam fills and reservoir area safety.Simultaneously, soft, the avalanche or breakdown in impervious barrier part, dam outside may making under the head effect before the dam brings difficulty for the maintenance management in stockyard.(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.

Summary of the invention:

The objective of the invention is to: a kind of reservoir area drain combined assembly that is suitable for the dry method red mud storage yard drainage requirement is provided, and it can effectively discharge wastewater from red mud and reservoir area rainfall, and can reduce the delay of rainwater on the red mud surface, and it is fixed to accelerate the red mud mummification.

The present invention constitutes like this: it is made up of outer dam (1), impervious barrier (2), drainage layer (3), inclined tube (4), dam-through pipe (5), filter pipe (6), impervious barrier (2) is located between outer dam (1) and the drainage layer (3), and inclined tube (4), dam-through pipe (5) and filter pipe (6) connect with tee piece; Inclined tube (4) tiltedly is laid on the inclined-plane of drainage layer (3), is arranged with water inlet (7) on inclined tube (4), and lid (8) is arranged on the water inlet (7); The import of filter pipe (6) is laid on the minimum point place of impervious barrier (2) upper surface; Dam-through pipe (5) tilts to pass outside the outer dam (1).

The present invention compared with prior art has and can effectively discharge wastewater from red mud and rainwater, is unlikely to again red mud is discharged with rainwater simultaneously, reduces environment pollution; And can reduce the delay of rainwater on the red mud surface, accelerate advantages such as the red mud mummification is fixed.

Description of drawings:

Accompanying drawing 1 is a principle schematic of the present invention;

Accompanying drawing 2 is the constitutional diagram of inclined tube (4), dam-through pipe (5) and filter pipe (6).

The specific embodiment:

Embodiments of the invention: impervious barrier (2) is laid on the outer dam (1), and impervious barrier (2) is gone up and is laid drainage layer (3); Minimum point at impervious barrier (2) upper surface is embedded with perforate filter pipe (6), dam-through pipe (5), inclined tube (4) that filter pipe (6) connects by threeway.The be laid in surface of domatic drainage layer (3) of inclined tube (4), inclined tube (4) is gone up and is established (7) one of rainwater water inlets every certain spacing, and water inlet (7) termination is welded with flange.During rainfall, rainwater enters inclined tube (4) by water inlet (7), discharges outside the storehouse with certain gradient by dam-through pipe (5) again.When stockyard red mud face arrives a certain water inlet (7) bottom absolute altitude, seal this water inlet with a blind flange (8), and use the more water inlet of upper level, until a highest water inlet sealing.After rainwater enters dam-through pipe (5) along inclined tube (4), can play flushing action to a small amount of red mud that deposits at ordinary times in the dam-through pipe (5).During not rainfall at ordinary times, drainage layer (3) can leach wastewater from red mud, is pooled to filter pipe (6), discharges outside the storehouse by dam-through pipe (5) again.

Dam-through pipe (5) gradient and water inlet (7) spacing dimension can be determined according to weather conditions, reservoir area area etc.

Claims

1. the drain combined assembly on the outer dam of a dry method red mud storage yard, it is made up of outer dam (1), impervious barrier (2), drainage layer (3), inclined tube (4), dam-through pipe (5), filter pipe (6), it is characterized in that: impervious barrier (2) is located between outer dam (1) and the drainage layer (3), and inclined tube (4), dam-through pipe (5) and filter pipe (6) connect with tee piece; Inclined tube (4) tiltedly is laid on the inclined-plane of drainage layer (3), is arranged with water inlet (7) on inclined tube (4), and lid (8) is arranged on the water inlet (7); The import of filter pipe (6) is laid on the minimum point place of impervious barrier (2) upper surface, and dam-through pipe (5) tilts to pass outside the outer dam (1).