CA2287640C - Slurry distributor - Google Patents
Slurry distributor Download PDFInfo
- Publication number
- CA2287640C CA2287640C CA 2287640 CA2287640A CA2287640C CA 2287640 C CA2287640 C CA 2287640C CA 2287640 CA2287640 CA 2287640 CA 2287640 A CA2287640 A CA 2287640A CA 2287640 C CA2287640 C CA 2287640C
- Authority
- CA
- Canada
- Prior art keywords
- duct
- slurry
- section
- discharge openings
- slurry distributor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 61
- 239000007787 solid Substances 0.000 claims abstract description 3
- 210000005069 ears Anatomy 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000007858 starting material Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 235000000396 iron Nutrition 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/28—Piling or unpiling loose materials in bulk, e.g. coal, manure, timber, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/30—Conveying materials in bulk through pipes or tubes by liquid pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The slurry distributor comprises two or more square pipe sections in end-to-end relation having an inlet at one end for connection to a slurry supply and provided with discharge openings equally spaced longitudinally thereof; on each side of the square pipe for discharge of the slurry, the openings being successively obstructed manually or by deposited solids from the slurry itself piling up on the original ground level. The distributor is used to control the slurry composition for dyke building and general tailings disposal consisting of mine tailings.
Description
TITLE OF THE INVENTION
Slurry distributor.
FIELD OF THE INVENTION
The present invention relates to slurry distributors for the control of s slurry composition, building dykes and general tailing disposal from mine tailings to form a retaining area for mine tailings and concentration process water protection berms and dykes.
BACKGROUND OF THE INVENTION
It is known to provide a main large diameter pipe fed with slurry io made of mine residues and having a series of small diameter spigots, which can be successively closed or opened manually on one side.
The slurry is discharged at selected points on the ground for dyke building and when the slurry pile is sufficiently high at one spigot the latter is closed and opened again after extending the branch to an adjacent location.
is Once a certain area has been filled with the slurry, the branches are disconnected from the main pipe and again have to be connected after moving the entire assembly to another site.
This system has several disadvantages. It requires a large pumping capacity because of the resistance to the flow of slurry through the 2o small diameter spigots. It is labor intensive since the branches have to be extended continuously. The branches are connected to and disconnected from the main pipe each time the system is moved to another site. The main drawback is the fact that the starter dyke which must be mechanically built to form an abutment for the succeeding deposition of the slurry must be quite high and wide 2s requiring several weeks of work by mechanical earth movers such as bulldozers to place the required volume for the starter dyke. This represents a major portion of the cost of building or increasing the height of the retaining dyke.
In addition, this system does not lend itself to general tailings disposal.
It is also known that for small smaller slurry flow requirements to s provide a pipe with holes in the bottom suspended on wood racks. This method allows the deposition of the coarse portion of the tailings through the holes until they are successively obstructed. A length of this perforated pipe is installed perpendicular to the starter dyke.
This system has several disadvantages. It can only be used for io general tailings disposal and is not efficient (in many cases inadequate) for dyke construction because it does not allow for a uniform distribution of the slurry material from the beginning to the end of the pipe, hence the deposition angle formed at each successive hole becomes flatter and flatter. It does not allow for control of the slurry composition.
Is OBJECTS OF THE INVENTION
It is therefore the general object of the present invention to overcome the above noted disadvantages in that the system of the invention requires starter dykes of minimum size, are less labor intensive in that no work is required to the distributor duct until it is displaced from one site to the other 2o several days later and in that it requires less pumping capacity (20%) than conventional systems with branches fitted with spigots.
A second object of the present invention is the provision of a slurry distributor, which is less expensive to build and maintain than conventional distributors, and which is easily installed, advanced and removed onto and from 2s a dyke building site.
Slurry distributor.
FIELD OF THE INVENTION
The present invention relates to slurry distributors for the control of s slurry composition, building dykes and general tailing disposal from mine tailings to form a retaining area for mine tailings and concentration process water protection berms and dykes.
BACKGROUND OF THE INVENTION
It is known to provide a main large diameter pipe fed with slurry io made of mine residues and having a series of small diameter spigots, which can be successively closed or opened manually on one side.
The slurry is discharged at selected points on the ground for dyke building and when the slurry pile is sufficiently high at one spigot the latter is closed and opened again after extending the branch to an adjacent location.
is Once a certain area has been filled with the slurry, the branches are disconnected from the main pipe and again have to be connected after moving the entire assembly to another site.
This system has several disadvantages. It requires a large pumping capacity because of the resistance to the flow of slurry through the 2o small diameter spigots. It is labor intensive since the branches have to be extended continuously. The branches are connected to and disconnected from the main pipe each time the system is moved to another site. The main drawback is the fact that the starter dyke which must be mechanically built to form an abutment for the succeeding deposition of the slurry must be quite high and wide 2s requiring several weeks of work by mechanical earth movers such as bulldozers to place the required volume for the starter dyke. This represents a major portion of the cost of building or increasing the height of the retaining dyke.
In addition, this system does not lend itself to general tailings disposal.
It is also known that for small smaller slurry flow requirements to s provide a pipe with holes in the bottom suspended on wood racks. This method allows the deposition of the coarse portion of the tailings through the holes until they are successively obstructed. A length of this perforated pipe is installed perpendicular to the starter dyke.
This system has several disadvantages. It can only be used for io general tailings disposal and is not efficient (in many cases inadequate) for dyke construction because it does not allow for a uniform distribution of the slurry material from the beginning to the end of the pipe, hence the deposition angle formed at each successive hole becomes flatter and flatter. It does not allow for control of the slurry composition.
Is OBJECTS OF THE INVENTION
It is therefore the general object of the present invention to overcome the above noted disadvantages in that the system of the invention requires starter dykes of minimum size, are less labor intensive in that no work is required to the distributor duct until it is displaced from one site to the other 2o several days later and in that it requires less pumping capacity (20%) than conventional systems with branches fitted with spigots.
A second object of the present invention is the provision of a slurry distributor, which is less expensive to build and maintain than conventional distributors, and which is easily installed, advanced and removed onto and from 2s a dyke building site.
A third object of the present invention is the provision of a slurry distributor, which can be used for general tailings disposal due to its capacity to control the tailings composition and provide a uniform distribution of the slurry material along the entire length of the distributor.
SUMMARY OF THE INVENTION
This invention is directed to a slurry distributor which comprises a duct with an inner inlet end and an outer end, supports under said duct for supporting the same above ground in generally horizontal position, said duct having longitudinally spaced slurry discharge openings, said inlet end adapted to be connected to a supply of slurry under pressure whereby said slurry can be discharged from said duct directly unto the ground with the solid content of said slurry gradually forming dyke portions under and adjacent said duct along the length thereof and progressively obstructing said openings from said inlet end to said outer end, the duct is of generally quadrilateral cross-section and has a ceiling, a floor and side walls, said discharge openings made in said side walls, said openings arranged in pairs, the openings of each pair are aligned across said duct and further including inverted V-shaped baffles on said floor with the apices of said V-shaped baffles meeting along the centre line of said floor and said baffles diverging in a direction opposite to said inlet end and ending at said openings.
Preferably, deflector plates are secured at an angle to said side walls and to said floor at each corner thereof, and extending upstream from a single pair of registering discharge openings just upstream of the support, each of said deflector plates diverging inwardly from a respective one of said corners in a direction of said outer end so as to deflect said slurry inwardly of said duct prior reaching said pair of discharge openings and being partially discharged therethrough, thereby improving flow and discharge of said slurry into and from said duct, respectively.
Preferably, the top of the discharge openings on one side of said duct are at a lower level than the top of the discharge openings on the other side of said duct.
Preferably, the duct is made of two laterally spaced I-beam sections with the web of said I-beam sections forming said side walls and of top and bottom plates secured to the top and bottom flanges of said I-beam sections, respectively, and forming with said flanges said ceiling and said floor of said duct.
Preferably, each discharge opening has along its sides vertically arranged guideways located externally of said duct between said top and bottom flanges of a respective one of said I-beam sections, and closure plates vertically guided in said guideways.
Preferably, the duct is composed of two or more duct sections in end-to-end relation with connectors at each end of each section for connecting said sections.
Preferably, each duct section has a hook fixed to and upwardly protruding from its ceiling at the centre of gravity of said duct section so as to enable said duct section to be bodily lifted and transported.
Preferably, said connectors include a pair of transversely registering ears upstanding from each end of said duct section, with the ears at said outer end of a first duct section defining recesses and the ears at said inlet end of an adjacent second duct section supporting a cross-pin therebetween, such that the ears at said outer end of said first duct section overlap and removable attach to the ears at said inlet end of said adjacent second duct section, whereby said adjacent duct section being pin connected to the already installed first duct section, with said cross-pin being engaged by said recesses, while inclined and then pivotally lowered to become in abutment with said already installed first duct section with the adjacent ends of said first and second duct sections in abutment and in alignment.
Preferably, the openings on both sides of said duct have a sill at the same level above said floor but below the apices of said baffles and the openings on one side of the duct are higher than the openings on the other side of said duct.
Preferably, each of said supports is a box-shaped member with a downward extending skirt at the bottom of said support.
Preferably, a connector removable fitted to said inlet end of said duct, having a rectangular cross-section at one end to conform with the cross-sectional shape of said duct and having circular cross-section at the other end to be connected to a slurry supply cylindrical pipe.
Preferably, each of said duct sections includes a pair of spaced apart sleeve members, each of said sleeve members being generally transversely secured to the underside of one of said duct sections and being spaced apart to receive the forks of a fork-truck, said pair of sleeve members being inclined with respect to the longitudinal axis of said duct section so that said duct section is inclined to the horizontal when lifted by the forks of said fork-truck.
Preferably, there are hook means at the centre of gravity of said duct section protruding upwardly from the ceiling of the same.
SUMMARY OF THE INVENTION
This invention is directed to a slurry distributor which comprises a duct with an inner inlet end and an outer end, supports under said duct for supporting the same above ground in generally horizontal position, said duct having longitudinally spaced slurry discharge openings, said inlet end adapted to be connected to a supply of slurry under pressure whereby said slurry can be discharged from said duct directly unto the ground with the solid content of said slurry gradually forming dyke portions under and adjacent said duct along the length thereof and progressively obstructing said openings from said inlet end to said outer end, the duct is of generally quadrilateral cross-section and has a ceiling, a floor and side walls, said discharge openings made in said side walls, said openings arranged in pairs, the openings of each pair are aligned across said duct and further including inverted V-shaped baffles on said floor with the apices of said V-shaped baffles meeting along the centre line of said floor and said baffles diverging in a direction opposite to said inlet end and ending at said openings.
Preferably, deflector plates are secured at an angle to said side walls and to said floor at each corner thereof, and extending upstream from a single pair of registering discharge openings just upstream of the support, each of said deflector plates diverging inwardly from a respective one of said corners in a direction of said outer end so as to deflect said slurry inwardly of said duct prior reaching said pair of discharge openings and being partially discharged therethrough, thereby improving flow and discharge of said slurry into and from said duct, respectively.
Preferably, the top of the discharge openings on one side of said duct are at a lower level than the top of the discharge openings on the other side of said duct.
Preferably, the duct is made of two laterally spaced I-beam sections with the web of said I-beam sections forming said side walls and of top and bottom plates secured to the top and bottom flanges of said I-beam sections, respectively, and forming with said flanges said ceiling and said floor of said duct.
Preferably, each discharge opening has along its sides vertically arranged guideways located externally of said duct between said top and bottom flanges of a respective one of said I-beam sections, and closure plates vertically guided in said guideways.
Preferably, the duct is composed of two or more duct sections in end-to-end relation with connectors at each end of each section for connecting said sections.
Preferably, each duct section has a hook fixed to and upwardly protruding from its ceiling at the centre of gravity of said duct section so as to enable said duct section to be bodily lifted and transported.
Preferably, said connectors include a pair of transversely registering ears upstanding from each end of said duct section, with the ears at said outer end of a first duct section defining recesses and the ears at said inlet end of an adjacent second duct section supporting a cross-pin therebetween, such that the ears at said outer end of said first duct section overlap and removable attach to the ears at said inlet end of said adjacent second duct section, whereby said adjacent duct section being pin connected to the already installed first duct section, with said cross-pin being engaged by said recesses, while inclined and then pivotally lowered to become in abutment with said already installed first duct section with the adjacent ends of said first and second duct sections in abutment and in alignment.
Preferably, the openings on both sides of said duct have a sill at the same level above said floor but below the apices of said baffles and the openings on one side of the duct are higher than the openings on the other side of said duct.
Preferably, each of said supports is a box-shaped member with a downward extending skirt at the bottom of said support.
Preferably, a connector removable fitted to said inlet end of said duct, having a rectangular cross-section at one end to conform with the cross-sectional shape of said duct and having circular cross-section at the other end to be connected to a slurry supply cylindrical pipe.
Preferably, each of said duct sections includes a pair of spaced apart sleeve members, each of said sleeve members being generally transversely secured to the underside of one of said duct sections and being spaced apart to receive the forks of a fork-truck, said pair of sleeve members being inclined with respect to the longitudinal axis of said duct section so that said duct section is inclined to the horizontal when lifted by the forks of said fork-truck.
Preferably, there are hook means at the centre of gravity of said duct section protruding upwardly from the ceiling of the same.
BRIEF DESCRIPTION OF THE DRAWINGS
In the annexed drawings, like reference characters indicate like elements throughout.
Figure 1 is a side elevation of the distributor of the invention installed on a dyke building site;
Figure 1 a is an enlarged view of a portion of one of the two duct sections;
Figure 2 is a side elevation of two duct sections showing their coupling portions;
Figure 3 is a top plan view of the view of the coupling portions shown in Figure 2;
Figure 4 is a cross-section of one duct section taken along line 4-4 of Figure 6; and Figure 5 is a cross-section taken along line 5-5 of Figure 4; and Figure 6 is a top plan section of one portion of the duct of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The distributor of the invention consists of a pipe or duct 2 of generally rectangular cross-section being for instance fifteen inches wide by twenty inches high. The duct is composed for instance of two duct sections, namely duct section 4 which may have seventy feet in length and duct section 6 which may have forty feet in length.
Each duct section is formed by two laterally spaced I-beams 8 as shown in Figure 4, the top flanges 10 of each I-beam together with an intervening plate 12 welded thereto form the ceiling of the duct while the bottom flanges and the bottom plate 16 welded thereto form the floor of the duct. The web 18 of I-beams 8 form the side walls of the duct. These side walls are provided with left and right discharge openings 20 and 22 respectively looking in the direction of flow of the slurry as shown by arrow A in Figures 1 and 6.
These discharge openings are arranged in pairs, the openings of each pair being aligned across the duct. The pairs of openings are equally longitudinally spaced for a distance of, for instance, about ten feet along the length of duct 2 as shown in Figure 1. The number, placement and size of the openings is determined from the characteristics of the slurry material flowing in the duct. Each opening 20 and 22 has a sill 24 which is spaced above the floor 14, 16, the left discharge openings 20 have a top edge 26 which is at a lower level than the top edge 28 of right discharge openings 22 for a purpose which will be later described.
Each opening can be closed in a non-waterproof manner by means of a slide door 30 having a handle 31. As shown in Figures 4 and 5, the slide door 30 is guided for up and down movement by means of guideways formed on each side of the opening by an L-shaped vertical bar 32 and vertical angle irons 34 extended by a flat vertical bar 36. The door is also guided by a flat horizontal bar 38 and comes to rest on an angle bar 39.
The floor 14, 16 of the duct 2 is provided with deflector baffles 40 formed of angle irons secured in upside down position (forming an inverted V-shaped sections) and diverging in the direction of the slurry flow as shown at A in Figure 6. Baffles 40 are welded to flanges 14 and to centre filler plate 44.
The apices 42 of the deflector baffles 40 are at a level slightly higher than the level of the sills 24 of the left and right discharge openings 20, 22, and meet along the centre line of the floor 16, as shown Figures 4 and 6.
Deflector plates 46 are secured at an angle to the sidewalls and floor at each corner thereof and extend upstream from baffles 40 as clearly shown in Figure 6.
A floor hole 48 is made through the floor 14, 16 just upstream from the baffles 40 and support 70.
The inner inlet end of the duct section 4 is connected to a connector tube 50 which has a cylindrical inner end 52 to be connected to a standard cylindrical pin for supplying slurry under pressure. The connector tube 50 has an outer end portion 54 of rectangular cross-section sized to form a butt joint with the inner end of duct section 4.
As shown Figures 2 and 3, the inner end of duct section 6 is provided with a pair of upstanding ears 56 supporting a cross-pin 58 adapted to engage the recesses 60 of ears 62 upstanding from duct section 4 when duct section 6 is upwardly inclined with respect to duct section 4. Subsequent, lowering of duct section 6 brings the two adjacent ends of the sections 4, 6 in abutment.
Duct section 4 (see Figure 1) is provided with a hook 64 at its centre of gravity for handling the duct section 4 with a loader or the like.
Also, straps 66 are disposed on each side of the hook 64 for raising and lowering the duct section by means of a fork truck or the like.
Similarly, as shown in Figure 1 a, duct section 6 is provided at its centre of gravity with a hook 64 and a pair of upstanding straps 66 and it is further provided with fork receiving sleeves 68 protruding from the floor of the duct section and inclined with respect to the longitudinal axis of the section whereby said duct section can be manipulated by a fork truck while at a suitable inclination for hooking onto the previously laid duct section 4 by means of the connector assembly 56 to 62.
The duct 2 is supported in generally horizontal position above ground G by means of a support 70 in the form of a box provided at its bottom with a skirt 72 to be inserted into the ground so as to stabilize a support 70, which is positioned under the connector assembly 56 to 62.
The slurry is normally composed of water and 20 to 60% solid material by weight of different size distribution. This material comes from the residues of the ore concentration operation and serves to build a dyke to eventually form a retaining pond for receiving the mine tailings. A starter dyke is first made using bulldozers or other mechanical equipment, this starter dyke of generally trapezoidal cross-section is made as small as possible in cross-section because of the heavy expenditure involved in the use of mechanical earth moving equipment as opposed to hydraulically depositing the material with the slurry distributor.
The duct 2 is laid along and a suitable distance determined by slurry characteristics from the starter dyke on the pond side thereof and is connected by the connector tube 50 to a slurry supply under pressure. The slurry is discharged from the discharge openings 20,22 closest to the connector tube and gradually forms a mound on each side of and underneath the duct 2 which becomes sufficiently high to obstruct these first upstream openings 20,22.
The slurry continues to the next downstream pair of discharge openings and is discharged at this site to form a mound. The process is continued until the deposited material successively obstructs all the openings.
In the annexed drawings, like reference characters indicate like elements throughout.
Figure 1 is a side elevation of the distributor of the invention installed on a dyke building site;
Figure 1 a is an enlarged view of a portion of one of the two duct sections;
Figure 2 is a side elevation of two duct sections showing their coupling portions;
Figure 3 is a top plan view of the view of the coupling portions shown in Figure 2;
Figure 4 is a cross-section of one duct section taken along line 4-4 of Figure 6; and Figure 5 is a cross-section taken along line 5-5 of Figure 4; and Figure 6 is a top plan section of one portion of the duct of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The distributor of the invention consists of a pipe or duct 2 of generally rectangular cross-section being for instance fifteen inches wide by twenty inches high. The duct is composed for instance of two duct sections, namely duct section 4 which may have seventy feet in length and duct section 6 which may have forty feet in length.
Each duct section is formed by two laterally spaced I-beams 8 as shown in Figure 4, the top flanges 10 of each I-beam together with an intervening plate 12 welded thereto form the ceiling of the duct while the bottom flanges and the bottom plate 16 welded thereto form the floor of the duct. The web 18 of I-beams 8 form the side walls of the duct. These side walls are provided with left and right discharge openings 20 and 22 respectively looking in the direction of flow of the slurry as shown by arrow A in Figures 1 and 6.
These discharge openings are arranged in pairs, the openings of each pair being aligned across the duct. The pairs of openings are equally longitudinally spaced for a distance of, for instance, about ten feet along the length of duct 2 as shown in Figure 1. The number, placement and size of the openings is determined from the characteristics of the slurry material flowing in the duct. Each opening 20 and 22 has a sill 24 which is spaced above the floor 14, 16, the left discharge openings 20 have a top edge 26 which is at a lower level than the top edge 28 of right discharge openings 22 for a purpose which will be later described.
Each opening can be closed in a non-waterproof manner by means of a slide door 30 having a handle 31. As shown in Figures 4 and 5, the slide door 30 is guided for up and down movement by means of guideways formed on each side of the opening by an L-shaped vertical bar 32 and vertical angle irons 34 extended by a flat vertical bar 36. The door is also guided by a flat horizontal bar 38 and comes to rest on an angle bar 39.
The floor 14, 16 of the duct 2 is provided with deflector baffles 40 formed of angle irons secured in upside down position (forming an inverted V-shaped sections) and diverging in the direction of the slurry flow as shown at A in Figure 6. Baffles 40 are welded to flanges 14 and to centre filler plate 44.
The apices 42 of the deflector baffles 40 are at a level slightly higher than the level of the sills 24 of the left and right discharge openings 20, 22, and meet along the centre line of the floor 16, as shown Figures 4 and 6.
Deflector plates 46 are secured at an angle to the sidewalls and floor at each corner thereof and extend upstream from baffles 40 as clearly shown in Figure 6.
A floor hole 48 is made through the floor 14, 16 just upstream from the baffles 40 and support 70.
The inner inlet end of the duct section 4 is connected to a connector tube 50 which has a cylindrical inner end 52 to be connected to a standard cylindrical pin for supplying slurry under pressure. The connector tube 50 has an outer end portion 54 of rectangular cross-section sized to form a butt joint with the inner end of duct section 4.
As shown Figures 2 and 3, the inner end of duct section 6 is provided with a pair of upstanding ears 56 supporting a cross-pin 58 adapted to engage the recesses 60 of ears 62 upstanding from duct section 4 when duct section 6 is upwardly inclined with respect to duct section 4. Subsequent, lowering of duct section 6 brings the two adjacent ends of the sections 4, 6 in abutment.
Duct section 4 (see Figure 1) is provided with a hook 64 at its centre of gravity for handling the duct section 4 with a loader or the like.
Also, straps 66 are disposed on each side of the hook 64 for raising and lowering the duct section by means of a fork truck or the like.
Similarly, as shown in Figure 1 a, duct section 6 is provided at its centre of gravity with a hook 64 and a pair of upstanding straps 66 and it is further provided with fork receiving sleeves 68 protruding from the floor of the duct section and inclined with respect to the longitudinal axis of the section whereby said duct section can be manipulated by a fork truck while at a suitable inclination for hooking onto the previously laid duct section 4 by means of the connector assembly 56 to 62.
The duct 2 is supported in generally horizontal position above ground G by means of a support 70 in the form of a box provided at its bottom with a skirt 72 to be inserted into the ground so as to stabilize a support 70, which is positioned under the connector assembly 56 to 62.
The slurry is normally composed of water and 20 to 60% solid material by weight of different size distribution. This material comes from the residues of the ore concentration operation and serves to build a dyke to eventually form a retaining pond for receiving the mine tailings. A starter dyke is first made using bulldozers or other mechanical equipment, this starter dyke of generally trapezoidal cross-section is made as small as possible in cross-section because of the heavy expenditure involved in the use of mechanical earth moving equipment as opposed to hydraulically depositing the material with the slurry distributor.
The duct 2 is laid along and a suitable distance determined by slurry characteristics from the starter dyke on the pond side thereof and is connected by the connector tube 50 to a slurry supply under pressure. The slurry is discharged from the discharge openings 20,22 closest to the connector tube and gradually forms a mound on each side of and underneath the duct 2 which becomes sufficiently high to obstruct these first upstream openings 20,22.
The slurry continues to the next downstream pair of discharge openings and is discharged at this site to form a mound. The process is continued until the deposited material successively obstructs all the openings.
The material is also directly discharged underneath the duct by the floor holes 48. To prevent the discharge of granular material to build up to a level higher than duct 2, the slide doors 30 are inserted to close the no-longer discharging openings 20, 22.
The support 72 becomes fully embedded into the deposited material.
One side of the discharge openings 20 is facing the starter dyke.
These openings have a lower height than the discharge opening 22 so that the finer portion of the slurry is trapped within the top of duct 2 and is not discharged from this side of the duct, only the coarser material being discharged so that the dyke can be built with as steep a slope as possible on the side of the starter dyke.
After the duct has become practically embedded in the granular material, it is moved to another site further along the length of the starter dyke to continue the building of the main dyke.
The support 72 becomes fully embedded into the deposited material.
One side of the discharge openings 20 is facing the starter dyke.
These openings have a lower height than the discharge opening 22 so that the finer portion of the slurry is trapped within the top of duct 2 and is not discharged from this side of the duct, only the coarser material being discharged so that the dyke can be built with as steep a slope as possible on the side of the starter dyke.
After the duct has become practically embedded in the granular material, it is moved to another site further along the length of the starter dyke to continue the building of the main dyke.
Claims (14)
1. A slurry distributor controlling the slurry composition in a way allowing for dyke building or general tailings disposal comprising a duct with an inner inlet end and an outer end, supports under said duct for supporting the same above ground in generally horizontal position, said duct having longitudinally spaced slurry discharge openings, said inlet end for connecting to a supply of slurry under pressure whereby said slurry is discharged from said duct directly unto the ground with the solid content of said slurry gradually forming dyke portions under and adjacent said duct along the length thereof and progressively obstructing said discharge openings from said inlet end to said outer end, said duct is of generally quadrilateral cross-section and has a ceiling, a floor and side walls, said discharge openings are made in said side walls, said discharge openings arranged in pairs, the discharge openings of each pair of discharge openings are aligned across said duct and further including inverted V-shaped baffles on said floor with the apices of said V-shaped baffles meeting along the centre line of said floor and said baffles diverging in a direction opposite to said inlet end and ending at said discharge openings.
2. A slurry distributor as defined in claim 1, including deflector plates secured at an angle to said side walls and to said floor at each corner thereof, and extending upstream from a single pair of registering discharge openings just upstream of the support, each of said deflector plates diverging inwardly from a respective one of said corners in a direction of said outer end so as to deflect said slurry inwardly of said duct prior reaching said pair of discharge openings and being partially discharged therethrough, thereby improving flow and discharge of said slurry into and from said duct, respectively.
3. A slurry distributor as defined in claim 2, wherein the top of the discharge openings on one side of said duct are at a lower level than the top of the discharge openings on the other side of said duct.
4. A slurry distributor as defined in claim 3, wherein said duct is made of two laterally spaced I-beam sections with the web of each of said I-beam sections forming one of said side walls of said duct and of top and bottom plates secured to the top and bottom flanges of said I-beam sections, respectively, and forming with said flanges said ceiling and said floor of said duct.
5. A slurry distributor as defined in claim 4, wherein each discharge opening has along its sides vertically arranged guideways located externally of said duct between said top and bottom flanges of a respective one of said I-beam sections, and closure plates vertically guided in said guideways.
6. A slurry distributor as defined in claim 1, wherein said duct is composed of at least two duct sections in end-to-end relation with connectors at each end of each section for connecting said duct sections.
7. A slurry distributor as defined in claim 6, wherein each duct section has a hook fixed to and upwardly protruding from its ceiling at the centre of gravity of said duct section so as to enable said duct section to be bodily lifted and transported.
8. A slurry distributor as defined in claim 7, wherein said connectors include a pair of transversely registering ears upstanding from each end of said duct sections with the ears at said outer end of a first duct section defining recesses and the ears at said inlet end of an adjacent second duct section supporting a cross-pin therebetween, such that the ears at said outer end of said first duct section overlap and removably attach to the ears at said inlet end of said adjacent second duct section, whereby said adjacent duct section being pin connected to an already installed first duct section, with said cross-pin being engaged by said recesses, while inclined and then pivotally lowered about said cross-pin to become in abutment with said already installed first duct section with the adjacent ends of said first and second duct sections in abutment and in alignment.
9. A slurry distributor as defined in claim 2, wherein the openings on both sides of said duct have a sill at the same level above said floor but below the apices of said baffles and the openings on one side of the duct are higher than the openings on the other side of said duct.
10. A slurry distributor as defined in claim 1, wherein each of said supports is a combination of box-shaped members with a downwardly extending skirt at the bottom of said support.
11. A slurry distributor as defined in claim 1, including a duct connector removably fitted to said inlet end of said duct, having a rectangular cross-section at one end to conform with the cross-sectional shape of said duct and having circular cross-section at the other end for connecting to a slurry supply cylindrical pipe.
12. A slurry distributor as defined in claim 8, wherein each of said duct sections includes a pair of spaced apart sleeve members, each of said sleeve members being generally transversely secured to the underside of one of said duct sections and being spaced apart for receiving the forks of a fork-truck, said pair of sleeve members being inclined with respect to the longitudinal axis of said duct section so that said duct section is inclined to the horizontal when lifted by the forks of said fork-truck.
13. A slurry distributor as defined in claim 12, including hook means at the center of gravity of said duct section protruding upwardly from the ceiling of the same.
14
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2287640 CA2287640C (en) | 1999-10-22 | 1999-10-22 | Slurry distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2287640 CA2287640C (en) | 1999-10-22 | 1999-10-22 | Slurry distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2287640A1 CA2287640A1 (en) | 2001-04-22 |
| CA2287640C true CA2287640C (en) | 2003-06-24 |
Family
ID=4164492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2287640 Expired - Lifetime CA2287640C (en) | 1999-10-22 | 1999-10-22 | Slurry distributor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2287640C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936006A (en) * | 2010-09-01 | 2011-01-05 | 中冶沈勘工程技术有限公司 | Tubular microporous tailing damming method |
-
1999
- 1999-10-22 CA CA 2287640 patent/CA2287640C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2287640A1 (en) | 2001-04-22 |
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