CA2497642A1 - Method of producing of separate/isolated/pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes - Google Patents
Method of producing of separate/isolated/pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes Download PDFInfo
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- CA2497642A1 CA2497642A1 CA002497642A CA2497642A CA2497642A1 CA 2497642 A1 CA2497642 A1 CA 2497642A1 CA 002497642 A CA002497642 A CA 002497642A CA 2497642 A CA2497642 A CA 2497642A CA 2497642 A1 CA2497642 A1 CA 2497642A1
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- pulp
- solid particles
- sluice
- linear dimensions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Method of setting water gravel solutions in rotary motion and screening /destruction/ of clay and sand formation into components by passing solid particles through perforated plates for their sorting out according to linear dimensions, grouping of separated solid particles in certain layers of pulp, separation /isolation/of pulp flows containing solid particles of given linear dimensions with succeeding sedimentation of valuable component on the set of gravitational sluice boxes.
Description
Field of technology The method refers to the sphere of mining industry, namely extracting of valuable and rare earth metals and other solid minerals (diamonds).
Level of technics Presently mining industry broadly uses methods and devices based on gravity and centrifugal force usage, separately or in combination with each other and other forces under effect of industrial hydro-washing machines on the pulp. Remote analogues are methods used in Keelson concentrator (Canada), Ivankovsky separator (Russia), devices of Alaska series (USA), in spiral separators of Einley, Falcon concentrators. Prototypes and close analogues were not found by the author.
z The deficiencies of methods being used in the work of gravitational sluice boxes are following:
1. A gravitational sedimentary sluice box receives the pulp containing solid particles with linear dimensions from 40mm to parts of millimeter.
max 40 4 1 O1 min 10 3 - 1 10 3 -'-' 4 10' 2. A wide scale of linear dimensions is a reason of operation losses.
Level of technics Presently mining industry broadly uses methods and devices based on gravity and centrifugal force usage, separately or in combination with each other and other forces under effect of industrial hydro-washing machines on the pulp. Remote analogues are methods used in Keelson concentrator (Canada), Ivankovsky separator (Russia), devices of Alaska series (USA), in spiral separators of Einley, Falcon concentrators. Prototypes and close analogues were not found by the author.
z The deficiencies of methods being used in the work of gravitational sluice boxes are following:
1. A gravitational sedimentary sluice box receives the pulp containing solid particles with linear dimensions from 40mm to parts of millimeter.
max 40 4 1 O1 min 10 3 - 1 10 3 -'-' 4 10' 2. A wide scale of linear dimensions is a reason of operation losses.
3. The possibility of the stored -program control is absent.
Table 1 of essential signs.
I. Method, which is used in a sluice box equipped by intra-sluice segmentation device.
II. Method, which is suggested as a variant of the method I.
III. Method, which is used in the centrifugal Keelson's apparatus and "Hydro-cyclones".
N~ Title of the sign I II III
1 Rectilinear pulp motion + - -2 Circular (rotary) motion - + +
3 Dividing of solid particles into flows by linear+ + -dimensions into n groups 4 Extraction of the concentrate of valuable components- - +
from the pulp.
Using of constructive elements for dividing + + -solid particles (perforated plates, screens and grids).
6 Dividing the aggregate pulp flow into n flows + + -where n>3 Conclusion.
According to 2 signs from 6 the suggested method has a coincidence with the method III, which accounts 33%. The suggested method has a coincidence with the method I according to 4 signs, which accounts 66%.
Table 2 of essential signs.
N~ Title of the sign I II III
1 Precipitation as a goal of methods. - - +
2 Dividing of solid particles into flows by linear+ + -dimensions as a goal of methods.
3 Isolation of groups of solid particles with given+ + -linear dimensions as a goal of methods.
4 Rectilinear pulp motion. + - -Circular (rotary) pulp motion. - + +
6 Using of constructive elements for dividing solid+ + -particles (perforated plates, screens and grids).
7 Dividing of the aggregate pulp flow into n flows+ + -where n>3 8 Using of gravitational force G + - -9 ~ Using of centrifugal force Fc - + +
Conclusion.
According to 2 signs from 9 the suggested method has a coincidence with the method III, which accounts 22,2%. The suggested method has a coincidence with the method I according to 4 signs, which accounts 44,4%. The closer analog of the suggested method is the method being used in sluice boxes equipped by intra-sluice segmentation device.
y Prototype 1. Gravitational sedimentary sluice box 2. Gravitational sedimentary sluice box, equipped by infra-sluice segmentation device 3. Gravitational sedimentary sluice box equipped by infra-sluice segmentation device, which is topped with plate welded to boards of the sluice box. Instead of boards in the head part and in the end part there is correspondingly an inlet and an outlet.
4. Gravitational sluice box topped with the plate is placed on the one of boards.
Table 1 of essential signs.
I. Method, which is used in a sluice box equipped by intra-sluice segmentation device.
II. Method, which is suggested as a variant of the method I.
III. Method, which is used in the centrifugal Keelson's apparatus and "Hydro-cyclones".
N~ Title of the sign I II III
1 Rectilinear pulp motion + - -2 Circular (rotary) motion - + +
3 Dividing of solid particles into flows by linear+ + -dimensions into n groups 4 Extraction of the concentrate of valuable components- - +
from the pulp.
Using of constructive elements for dividing + + -solid particles (perforated plates, screens and grids).
6 Dividing the aggregate pulp flow into n flows + + -where n>3 Conclusion.
According to 2 signs from 6 the suggested method has a coincidence with the method III, which accounts 33%. The suggested method has a coincidence with the method I according to 4 signs, which accounts 66%.
Table 2 of essential signs.
N~ Title of the sign I II III
1 Precipitation as a goal of methods. - - +
2 Dividing of solid particles into flows by linear+ + -dimensions as a goal of methods.
3 Isolation of groups of solid particles with given+ + -linear dimensions as a goal of methods.
4 Rectilinear pulp motion. + - -Circular (rotary) pulp motion. - + +
6 Using of constructive elements for dividing solid+ + -particles (perforated plates, screens and grids).
7 Dividing of the aggregate pulp flow into n flows+ + -where n>3 8 Using of gravitational force G + - -9 ~ Using of centrifugal force Fc - + +
Conclusion.
According to 2 signs from 9 the suggested method has a coincidence with the method III, which accounts 22,2%. The suggested method has a coincidence with the method I according to 4 signs, which accounts 44,4%. The closer analog of the suggested method is the method being used in sluice boxes equipped by intra-sluice segmentation device.
y Prototype 1. Gravitational sedimentary sluice box 2. Gravitational sedimentary sluice box, equipped by infra-sluice segmentation device 3. Gravitational sedimentary sluice box equipped by infra-sluice segmentation device, which is topped with plate welded to boards of the sluice box. Instead of boards in the head part and in the end part there is correspondingly an inlet and an outlet.
4. Gravitational sluice box topped with the plate is placed on the one of boards.
5. The sluice top with all sluice box equipped by segmentation device is wound in spiral round the axle O. It is the internal wall of the spiral. The bottom of the sluice box transforms into the external wall of the spiral.
After comparing the device of the variant N5 with the "CMDC" the conclusion about the constructive identity can be done.
Comparing the method being used in the work of the sluice box equipped by the segmentation device with the method working in the "CMDC" two differences are found:
1. The space dispositions are different.
2. The principal acting forces are different. Gravitational force acts in one method and centrifugal force in the other.
The other essential signs of the methods being compared coincide.
Table N3. Signs of the methods in which the centrifugal force is used.
I. Method,which is used in cyclone work II. Method,which is used in spiral separators.
III. Method,which is used in I~nelson's concentrators.
IV. Suggested method.
Ns Title of the sign Methods I II III IV
1 Circular motion of the pulp - + + _ 2 Spiral motion of the pulp + - - +
3 Availability of gravitational + - -sluice boxes for the precipitation of the valuable component 4 Continuous cycle of operating + - - + -Gathering of the concentrate from- + + -centrifugal apparatus 6 Speed V m/sec min max max min 7 Centrifugal force Fc min max max min 2g 200g 300g 2-4g 8 Processing of the pulp containing- + + -solid particles less than S mm 9 Processing of the pulp containing+ - - +
solid particles less 40 mm Dividing of pulp solid part - - - +
11 Classification of solid particles- - - +
of the pulp 12 Grouping (herding) of solid particles- - - +
with given linear dimensions 13 Segregation of the aggregate pulp- - - +
flow into n isolated flows 14 Availability of the complete set - - - +
of sluice boxes of shallow filling Losses of valuable component consideconside conside min rable rable rable Tasks of the suggested method 1. To confers the rectilinear pulp motion into the rotary one.
2. To cluster solid particles with the greatest overall dimension a <_ 4mm into n groups with interval of dimensions from 4 0,8 mm to A 0,1 mm.
3. To dispose groups of clustered solid particles in order of diminution of linear dimensions from the axle of rotation to the external walls.
4. To disintegl-ate unstable complex "clay + sand" by numerous strikes n where n>103.
5. To isolate pulp flows containing solid particles with given dimensions.
6. To escape isolated pulp flows out from the "CMDC" and to drive them in the corresponding sluice boxes of the set.
7. To make optimum conditions for the precipitation:
a) by using of sluice boxes of shallow filling, b) by adjusting an angle a for everyone of sluice boxes.
8. To reduce of water using, i. e. 1/5 < S/L < 1/10; S/L = 1/5...1/7 Essence of the method.
The method accomplishes several tasks:
1. It offers means for the conversion of rectilinear motion of the pulp escaping a hydro-washing machine into rotary motion. It is achieved due to upper and down spiral bands, internal and external walls of the "Centrifugal mixer-disintegrator- classifier"
2. Breaking up of complexes from clay and sand.
3. Dividing of pulp solid particles according to given linear dimensions.
4. Clustering of solid particles according to given parameters into groups.
5. Keeping clustered groups of classified solid particles in the given layers (on the definite height) of the pulp stratum.
6. Separation of the aggregate pulp flow into numerous n flows with isolation of everyone of them. Everyone of separated flows contains solid particles with the greatest linear dimensions being in given parameters "from...to...". This task is resolved with the help of separative plates, which are perforated at the most part of their distance and without perforation to the end part of "CMDC". The internal and external walls, up and down spiral bands are never perforated.
All these separative elements transform into branch pipes having a cross section as a) a circle, b) a square, c) a rectangle.
7. Precipitation of valuable components from separated flows is accomplished in the considering body of the complete set of sluice boxes. L a as a tilting angle to the horizontal level is individual for every sluice box. This angle fluctuates in the space 0,1 < sin a <0,05 and depends from the diameter of meshes (openings) perforating separative plates.
sin a ~X = 0,1 sin a ~n = 0,05 sin a maX > sin a2 > sin a3 ...> sin a ~n Conditions for the realization of the method.
I. Availability of the pulp escaping a hydro-washing machine.
II. Availability of centrifugal apparatus having got the following constructive elements:
1. Pulp line connecting hydro-washing machine with the "CMDC".
2. The inlet to the "CMDC" apparatus.
3. Plates enclosing the pulp from top to bottom, from inside to outside.
4. Perforated plates.
5. Elements for breaking up disposed on perforated plates.
6. Separative plate without perforation in the end of "CMDC".
7. The outlet of the "CMDC".
8. The complete set of branch pipes connecting "CMDC" with the corresponding sluice boxes.
9. The complete set of sedimentary sluice boxes positioned at different angle a regarding the horizontal line.
III. Speed of the pulp motion in the inlet of the "CMDC": V > 2m/sec.
IV. Correlation between solid and liquid parts in the pulp: S : L > 1 : 5.
Scheme of the method Aggregate pulp flow containing solid and liquid parts escapes a hydro-washing machine with the speed Vi. The pulp consists from water L and solid particles S of different linear dimensions. There are more than 3 pulp flows escaping "CMDC".
n > 3. Paggr = n ~ Pdiv; Paggr SQL; where S= k ' n;
L - water; S - solid particles; k - overall dimensions of solid particles; n -number of pulp flows. Sb - sluice box S k n m nz n3 nn Paggr= =P --+--i---i-...-L L L L L L
V=Vl=V2=V3=... Vn Paggr --'~ n ' Pdiv Pdiv 1 '-~ Sbl~ Pdiv 2 -i-Sb2, Pdiv n --~' Sb n.
I. Classic scheme Hwm (hydro-washing machine) -~' Paggr -~- Sb II. Scheme of the suggested method Hwm (hydro-washing machine) ---~- Paggr ...~,"CMDC» --a~ Pdiv n --~Sb n.
I Hwm = II Hwm; I Paggr = II Pindiv; I Sb ~ II Sb n II - I = «CMDC» + n sluice boxes io Table 4 of linear dimensions for dividing of solid particles in the pulp.
N~ Overall linear dimensions Difference 9 >4,0 mm 8 4,0 mm - 3,2 mm 0 0,8 mm 7 3,2 mm - 2,5 mm 0 0,7 mm 6 2,5 mm - 1,9 mm 0 0,6 mm 1,9 mm - 1,4 mm 0 0,5 mm 4 1,4 mm - 1,0 mm 0 0,4 mm 3 1,0 mm - 0,7 mm ~ 0,3 mm 2 0,7 mm - 0,5 mm ~ 0,2 mm 1 0,5 mm - 0,4 mm 0 0,1 mm 0 0,4 mm and less Table 5of linear dimensions for dividing of solid particles in the pulp.
OD - overall linear dimension No Overall linear dimensions Difference N
9 K>OD 9 - .
8 I>OD>H ~ 8 0'8~~
7 H>OD>G 00,7 mm--~ 7 6 G>OD>F 00,6 mm--~ 6 5 F>OD>E ~O,Smm---~- 5 4 E>OD>D 00,4mm--~- 4 3 D>OD>C 00,3 mm ~- 3 2 C>OD>B ~0,2mm--~- 2 1 B>OD>A X0,1 mm--~ I
Signs being used for the characteristic of the method Presence of cumulative action 1. Pulp movement. Pulp escaping the scrubber has rectilinear uniformly translational motion. Application of the given method provides that the pulp moving to spire of "CMDC" acquires rotary uniformly translational motion.
Leaving the "CMDC" and getting into the set of valuable component sedimentation the pulp acquires rectilinear uniformly translational motion again. This movement can be divided into three stages:
Stage I. The pulp leaving washing device moves rectilinearly and uniformly.
Stage II. In the "CMDC" the pulp moves spirally around the axle of rotation placed a) vertically, b) horizontally, c) in intermediate position.
Stage III. Leaving the "CMDC" the pulp moves rectilinearly and uniformly.
2. Quantity of pulp flows. The pulp leaves the scrubber in single aggregate flow Paggr and enters "CMDC". The pulp leaves the "CMDC" divided into several N
separated flows. Scheme N4.
P aggr = n P au, rRe P aggr - aggregate pulp flow, n - number of pulp flows P aggr ~ P aivl =~ P div2 ~= ...P a«n where n ~ 3 V P aggr - volume of aggregate pulp flow V P aim - volume of the first divided pulp flow It follows from this that V P aggr = V P aim + V P au2 +... V P au n Mass of the pulp M in being fed in the "CMDC" is the same that mass of pulp leaving the device, i.e. M in = M out.
3.Isolation of pulp flows. Aggregate pulp flow in pulp line is isolated. All output pulp flows in branch pipes are isolated.
4.Qualitative contents of pulp.
a) according to solid and liquid parts ratio:
Pulp Pair has in its content solid part (phase) S and liquid part L. Ratio S:L
=
1:10 according to classic principle.
b) according to specific weight:
Liquid part of pulp is water that remains unchanged in the method, i.e. L-const.
Solid part of pulp consists from solid particles with dimensions less than 40mm and of different specific weight.
Specific weight Sw = n[(Vi ~ Sm) + (VZ ~ Sw2) + ...(Vn ~ Swn)]
Conclusion.
Pulp contains different solid particles with high variation in volume, linear dimensions and specific weight. These factors are used in the work of the method:
1. Hydro-washing machine forms pulp of water and rock containing valuable component.
2. In the "CMDC" solid particles of pulp are exposed to centrifugal force and group according to maximum overall dimension with the use of perforated plates.
3. Escaping the "CMDC" pulp are divided into separate isolated flows.
4. Isolated flows are directed to the set of gravitational sluice boxes each positioned at individual angle a. Heavier valuable components are precipitated in these sluice boxes.
Action - screening Solid part S of aggregate pulp flow Paggr has non-persistent substances of different dimensions such as sand and clay. These complexes should be disintegrated into compounds. This is achieved by numerous falling from height H and strikes of the complexes onto unmovable surface. In aggregate pulp flow Paggr complexes of sand and clay are carried to the top of the screen Scr, fall from height H
strike onto unmoving plate. After a certain period of time (t sec) complexes are disintegrated.
This action takes place in spiral rotation of pulp in the "CMDC". This process involves: a) liquid and solid parts of pulp, b) screen (plate) Scr with perforation, c) centrifugal force Fc, d) strike force F for a period of time t sec pulp being in the "CMDC" when sand and clay component passing way S. Work of disintegration of complex F = Fc ~ S.
Action - classification of solid particles of pulp Usage of such action as classification in this method refers to the largest linear dimensions of solid particles namely meshes in perforated plates and order of decrease in the square of meshes according to the distance from the axle of pulp rotation (4,Omm; 3,2mm; 2,Smm; l,9mm; l,4mm; l,Omm; 0,7mm; O,Smm;
0,4mm). A mesh can be square - shaped with the side equal to the diameter of a round mesh.
This action is carried out when solid particles of pulp exposed to centrifugal force are pressed out through meshes of perforated plates and are located in corresponding layer of pulp. Distribution into layers takes place in accordance with the largest overall dimension of solid particles. So particles with relatively larger size are located in tay~rs closer to the center of rotation, and relatively small particles are located farther from the center of rotation. This action of the "CMDC"
can be considered as given or programmed. 'This process involves:
a) pulp moving spirally and acquiring even rotary motion with speed V, b) plates limiting pulp: higher spiral bands and lower ones, internal (closer to the center of rotation) and external (the farthest from center of rotation) ones, c) perforated plates, which limit and redistribute movement of solid particles under effect of centrifugal force.
Action - disintegration Escaping hydro-washing device pulp moves rectilinear. The majority of solid particles is located in lower layers of pulp, solid particles are almost absent in higher layers. It programs action that forms solid particles in accordance with linear dimensions and solid particles are distributed in given points of pulp.
Effect of centrifugal force in the "CMDC" and perforated plates starts the process of disintegration, i.e. distribution of solid part of pulp in given layers of pulp. There are several isolated flows of pulp with grouped solid particles of given linear dimensions leaving the "CMDC".
P aggr -~- Il ' Pdiv 1. aggr ~' n ' Ldiv S aggr -~' n ' Sdiv Where P aggr - aggregate pulp flow leaving a hydro-washing machine and entering the "CMDC".
P aiv - divided and separated pulp flow escaping the "CMDC" and containing solid particles grouped according to given linear dimensions L aggr- overall flow of liquid leaving a hydro-washing machine and entering the "CMDC".
L div - divided and separated flow of liquid escaping the "CMDC" and containing solid particles grouped according to given linear dimensions S aggr - overall flow of solid particles leaving a hydro-washing machine and entering the "CMDC".
S aiv- solid particles with given linear dimensions grouped in a separated flow just before leaving the "CMDC".
n - quantity of pulp flow leaving the "CMDC".
Action - gravitational precipitation of valuable component on the set of sluice boxes of shallow filling.
The set of gravitational sluice boxes of shallow filling connected with branch pipes to the «CMDC» is used for precipitation of valuable component.
Everyone sluice box of the set processes one isolated pulp flow containing solid particles of linear dimensions given by the program. The angle of its inclination depends from linear dimensions of solid particles being processed: sluice it is flattening with the diminution of solid particles linear dimensions.
0,1 > sin ai > sin a2 > ...sin an > 0,036.
The quantity of sluice boxes in the set is equal to the quantityr if isolated pulp flows leaving the "CMDC" for interrupted work of the device. The quantity of sluice boxes in the set is 2 times that of the pulp flows quantity for continuous work.
f6 Order of actions in the method 1. Output of aggregate pulp flow from hydro-washing machine is implemented via pulp pipeline.
2. The pulp acquires rotary motion when it is fed into the "CMDC" and moves spirally.
3. The "CMDC" includes the following processing:
a) screening of solid particles, b) disintegration of solid particles, c) classification according to the largest linear dimension, d) placing of solid particles of pulp at certain height and in given relative layers of pulp, e) isolation of pulp into separate flows, fj directing of each separate pulp flow to the corresponding body of the set of mufti-body sedimentary sluice boxes, g) removal on the ground of separate isolated pulp flow after its processing at gravitational sluice box.
Conditions for bringing to effect of actions 1. Mode of operation Due to the method pulp moves through the «CMDC» continuously. Pulp motion through the set of gravitational sluice boxes is also continuous due to transfernng of pulp flows from one line or row of sluice bodies to another. Processing of divided and separated pulp flows on the set of gravitational sluice boxes is also continuous due to alternate work of one line (row) of the sluice bodies to another.
It gives the possibility to gather the concentrate of valuable component from non-working sluice boxes.
2. The row material for the method work is aggregate pulp being fed from a hydro-washing machine.
3. Equipment for bringing to effect of the method are:
a) device "CMDC", b) set of gravitational sluice boxes.
1~
Graphic scheme of transformation of the rectilinear gravitational segmentation sluice box into centrifugal mixer-desintegrator-classifier.
Scheme N~ 1.
View of the sluice box from the inlet side: AB and CD - boards of sluice box, BC -bottom of sluice box.
Scheme N~2.
View of the sluice box from the inlet side: Gr - grids of the segmentation device.
Scheme Ns3.
View of the sluice box, topped by the cover AD, from the inlet side and on the long vertical section: P - pulp, Pl - pulp line.
Scheme Ns4.
View of the sluice box from the inlet side: 001- axle of rotation, R - radius of rotation.
Scheme Outlet of the sluice box equipped by the segmentation device and wound in spiral round the axle of rotation: ABCD - inlet of the sluice box, AiBiCIDi - outlet of the sluice box.
~8 r Method of producing of separate /isolated/ pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes.
Schame N.,~ Sa~er~e ~-°~
A
Gr ~ ~
8 a ~ c $e~ern~ l~'- 3 b i A.
Se~te~e N-~
C
A
Method of producing of separate /isolated/ pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice bores.
Sel~e~e N' ~
0 ~ t~
zo _...~,~. ~- , Field ~f t The method refers to the sphere of mining industry, namely extracting of valuable and rare earth metals and other solid minerals {diamonds).
Level of tech~i~
Presently mining industry broadly uses methods and devices based on gravity and centrifugal force usage, separately or in combination with each other and other forces under effect of industrial hydra-washing machines on the pulp. Remote analogues are methods used in Keelson concentrator (Canada), Ivankavsky separator (Russia), devices of Alaska series (USA), in spiral separators of Einley, Falcon concentrators. Prototypes and close analogues were not found by the author.
Prot~type.
The prototy~ of this r~tetl~od is the n~etl~ad of gravitational precipitation of . . .
from the pulp of industrial hyd-wa;~hing machines, earlier suggested by the same author. The new method reserves the main es ential signs of the previous one, but as a principal acting force for processing solid particles the centrifugal force was chosen. This centrifugal force can be adjusted and increased dozens and hundreds times, which ensures more productive work. In this method, the author provided for the possibility of continuous technological cycle.
The suggested method is very elective and according to theoretical perspective, it will decrease operating losses of gold by more than 6D%.
In addition, use of the method in extraction of platinum, minerals of platinum and rare earth groups is ensured a high economic benefit. It is highly efF~cient in extraction of fine diamonds. The method with other ones can be used in treatment of processed products from atomic electric power stations.
The further strategic development of the direction shown by the suggested method will help to get more efficient "know- how" in other spheres of industry.
.~~,~ ~ ~.~~.~
~u~khcrr ~'~ ~' ~~~ ,~ /AQ~ttaliy Kuzoet~wvl ,~o aa~~~
,Z~ ~=,_ i
After comparing the device of the variant N5 with the "CMDC" the conclusion about the constructive identity can be done.
Comparing the method being used in the work of the sluice box equipped by the segmentation device with the method working in the "CMDC" two differences are found:
1. The space dispositions are different.
2. The principal acting forces are different. Gravitational force acts in one method and centrifugal force in the other.
The other essential signs of the methods being compared coincide.
Table N3. Signs of the methods in which the centrifugal force is used.
I. Method,which is used in cyclone work II. Method,which is used in spiral separators.
III. Method,which is used in I~nelson's concentrators.
IV. Suggested method.
Ns Title of the sign Methods I II III IV
1 Circular motion of the pulp - + + _ 2 Spiral motion of the pulp + - - +
3 Availability of gravitational + - -sluice boxes for the precipitation of the valuable component 4 Continuous cycle of operating + - - + -Gathering of the concentrate from- + + -centrifugal apparatus 6 Speed V m/sec min max max min 7 Centrifugal force Fc min max max min 2g 200g 300g 2-4g 8 Processing of the pulp containing- + + -solid particles less than S mm 9 Processing of the pulp containing+ - - +
solid particles less 40 mm Dividing of pulp solid part - - - +
11 Classification of solid particles- - - +
of the pulp 12 Grouping (herding) of solid particles- - - +
with given linear dimensions 13 Segregation of the aggregate pulp- - - +
flow into n isolated flows 14 Availability of the complete set - - - +
of sluice boxes of shallow filling Losses of valuable component consideconside conside min rable rable rable Tasks of the suggested method 1. To confers the rectilinear pulp motion into the rotary one.
2. To cluster solid particles with the greatest overall dimension a <_ 4mm into n groups with interval of dimensions from 4 0,8 mm to A 0,1 mm.
3. To dispose groups of clustered solid particles in order of diminution of linear dimensions from the axle of rotation to the external walls.
4. To disintegl-ate unstable complex "clay + sand" by numerous strikes n where n>103.
5. To isolate pulp flows containing solid particles with given dimensions.
6. To escape isolated pulp flows out from the "CMDC" and to drive them in the corresponding sluice boxes of the set.
7. To make optimum conditions for the precipitation:
a) by using of sluice boxes of shallow filling, b) by adjusting an angle a for everyone of sluice boxes.
8. To reduce of water using, i. e. 1/5 < S/L < 1/10; S/L = 1/5...1/7 Essence of the method.
The method accomplishes several tasks:
1. It offers means for the conversion of rectilinear motion of the pulp escaping a hydro-washing machine into rotary motion. It is achieved due to upper and down spiral bands, internal and external walls of the "Centrifugal mixer-disintegrator- classifier"
2. Breaking up of complexes from clay and sand.
3. Dividing of pulp solid particles according to given linear dimensions.
4. Clustering of solid particles according to given parameters into groups.
5. Keeping clustered groups of classified solid particles in the given layers (on the definite height) of the pulp stratum.
6. Separation of the aggregate pulp flow into numerous n flows with isolation of everyone of them. Everyone of separated flows contains solid particles with the greatest linear dimensions being in given parameters "from...to...". This task is resolved with the help of separative plates, which are perforated at the most part of their distance and without perforation to the end part of "CMDC". The internal and external walls, up and down spiral bands are never perforated.
All these separative elements transform into branch pipes having a cross section as a) a circle, b) a square, c) a rectangle.
7. Precipitation of valuable components from separated flows is accomplished in the considering body of the complete set of sluice boxes. L a as a tilting angle to the horizontal level is individual for every sluice box. This angle fluctuates in the space 0,1 < sin a <0,05 and depends from the diameter of meshes (openings) perforating separative plates.
sin a ~X = 0,1 sin a ~n = 0,05 sin a maX > sin a2 > sin a3 ...> sin a ~n Conditions for the realization of the method.
I. Availability of the pulp escaping a hydro-washing machine.
II. Availability of centrifugal apparatus having got the following constructive elements:
1. Pulp line connecting hydro-washing machine with the "CMDC".
2. The inlet to the "CMDC" apparatus.
3. Plates enclosing the pulp from top to bottom, from inside to outside.
4. Perforated plates.
5. Elements for breaking up disposed on perforated plates.
6. Separative plate without perforation in the end of "CMDC".
7. The outlet of the "CMDC".
8. The complete set of branch pipes connecting "CMDC" with the corresponding sluice boxes.
9. The complete set of sedimentary sluice boxes positioned at different angle a regarding the horizontal line.
III. Speed of the pulp motion in the inlet of the "CMDC": V > 2m/sec.
IV. Correlation between solid and liquid parts in the pulp: S : L > 1 : 5.
Scheme of the method Aggregate pulp flow containing solid and liquid parts escapes a hydro-washing machine with the speed Vi. The pulp consists from water L and solid particles S of different linear dimensions. There are more than 3 pulp flows escaping "CMDC".
n > 3. Paggr = n ~ Pdiv; Paggr SQL; where S= k ' n;
L - water; S - solid particles; k - overall dimensions of solid particles; n -number of pulp flows. Sb - sluice box S k n m nz n3 nn Paggr= =P --+--i---i-...-L L L L L L
V=Vl=V2=V3=... Vn Paggr --'~ n ' Pdiv Pdiv 1 '-~ Sbl~ Pdiv 2 -i-Sb2, Pdiv n --~' Sb n.
I. Classic scheme Hwm (hydro-washing machine) -~' Paggr -~- Sb II. Scheme of the suggested method Hwm (hydro-washing machine) ---~- Paggr ...~,"CMDC» --a~ Pdiv n --~Sb n.
I Hwm = II Hwm; I Paggr = II Pindiv; I Sb ~ II Sb n II - I = «CMDC» + n sluice boxes io Table 4 of linear dimensions for dividing of solid particles in the pulp.
N~ Overall linear dimensions Difference 9 >4,0 mm 8 4,0 mm - 3,2 mm 0 0,8 mm 7 3,2 mm - 2,5 mm 0 0,7 mm 6 2,5 mm - 1,9 mm 0 0,6 mm 1,9 mm - 1,4 mm 0 0,5 mm 4 1,4 mm - 1,0 mm 0 0,4 mm 3 1,0 mm - 0,7 mm ~ 0,3 mm 2 0,7 mm - 0,5 mm ~ 0,2 mm 1 0,5 mm - 0,4 mm 0 0,1 mm 0 0,4 mm and less Table 5of linear dimensions for dividing of solid particles in the pulp.
OD - overall linear dimension No Overall linear dimensions Difference N
9 K>OD 9 - .
8 I>OD>H ~ 8 0'8~~
7 H>OD>G 00,7 mm--~ 7 6 G>OD>F 00,6 mm--~ 6 5 F>OD>E ~O,Smm---~- 5 4 E>OD>D 00,4mm--~- 4 3 D>OD>C 00,3 mm ~- 3 2 C>OD>B ~0,2mm--~- 2 1 B>OD>A X0,1 mm--~ I
Signs being used for the characteristic of the method Presence of cumulative action 1. Pulp movement. Pulp escaping the scrubber has rectilinear uniformly translational motion. Application of the given method provides that the pulp moving to spire of "CMDC" acquires rotary uniformly translational motion.
Leaving the "CMDC" and getting into the set of valuable component sedimentation the pulp acquires rectilinear uniformly translational motion again. This movement can be divided into three stages:
Stage I. The pulp leaving washing device moves rectilinearly and uniformly.
Stage II. In the "CMDC" the pulp moves spirally around the axle of rotation placed a) vertically, b) horizontally, c) in intermediate position.
Stage III. Leaving the "CMDC" the pulp moves rectilinearly and uniformly.
2. Quantity of pulp flows. The pulp leaves the scrubber in single aggregate flow Paggr and enters "CMDC". The pulp leaves the "CMDC" divided into several N
separated flows. Scheme N4.
P aggr = n P au, rRe P aggr - aggregate pulp flow, n - number of pulp flows P aggr ~ P aivl =~ P div2 ~= ...P a«n where n ~ 3 V P aggr - volume of aggregate pulp flow V P aim - volume of the first divided pulp flow It follows from this that V P aggr = V P aim + V P au2 +... V P au n Mass of the pulp M in being fed in the "CMDC" is the same that mass of pulp leaving the device, i.e. M in = M out.
3.Isolation of pulp flows. Aggregate pulp flow in pulp line is isolated. All output pulp flows in branch pipes are isolated.
4.Qualitative contents of pulp.
a) according to solid and liquid parts ratio:
Pulp Pair has in its content solid part (phase) S and liquid part L. Ratio S:L
=
1:10 according to classic principle.
b) according to specific weight:
Liquid part of pulp is water that remains unchanged in the method, i.e. L-const.
Solid part of pulp consists from solid particles with dimensions less than 40mm and of different specific weight.
Specific weight Sw = n[(Vi ~ Sm) + (VZ ~ Sw2) + ...(Vn ~ Swn)]
Conclusion.
Pulp contains different solid particles with high variation in volume, linear dimensions and specific weight. These factors are used in the work of the method:
1. Hydro-washing machine forms pulp of water and rock containing valuable component.
2. In the "CMDC" solid particles of pulp are exposed to centrifugal force and group according to maximum overall dimension with the use of perforated plates.
3. Escaping the "CMDC" pulp are divided into separate isolated flows.
4. Isolated flows are directed to the set of gravitational sluice boxes each positioned at individual angle a. Heavier valuable components are precipitated in these sluice boxes.
Action - screening Solid part S of aggregate pulp flow Paggr has non-persistent substances of different dimensions such as sand and clay. These complexes should be disintegrated into compounds. This is achieved by numerous falling from height H and strikes of the complexes onto unmovable surface. In aggregate pulp flow Paggr complexes of sand and clay are carried to the top of the screen Scr, fall from height H
strike onto unmoving plate. After a certain period of time (t sec) complexes are disintegrated.
This action takes place in spiral rotation of pulp in the "CMDC". This process involves: a) liquid and solid parts of pulp, b) screen (plate) Scr with perforation, c) centrifugal force Fc, d) strike force F for a period of time t sec pulp being in the "CMDC" when sand and clay component passing way S. Work of disintegration of complex F = Fc ~ S.
Action - classification of solid particles of pulp Usage of such action as classification in this method refers to the largest linear dimensions of solid particles namely meshes in perforated plates and order of decrease in the square of meshes according to the distance from the axle of pulp rotation (4,Omm; 3,2mm; 2,Smm; l,9mm; l,4mm; l,Omm; 0,7mm; O,Smm;
0,4mm). A mesh can be square - shaped with the side equal to the diameter of a round mesh.
This action is carried out when solid particles of pulp exposed to centrifugal force are pressed out through meshes of perforated plates and are located in corresponding layer of pulp. Distribution into layers takes place in accordance with the largest overall dimension of solid particles. So particles with relatively larger size are located in tay~rs closer to the center of rotation, and relatively small particles are located farther from the center of rotation. This action of the "CMDC"
can be considered as given or programmed. 'This process involves:
a) pulp moving spirally and acquiring even rotary motion with speed V, b) plates limiting pulp: higher spiral bands and lower ones, internal (closer to the center of rotation) and external (the farthest from center of rotation) ones, c) perforated plates, which limit and redistribute movement of solid particles under effect of centrifugal force.
Action - disintegration Escaping hydro-washing device pulp moves rectilinear. The majority of solid particles is located in lower layers of pulp, solid particles are almost absent in higher layers. It programs action that forms solid particles in accordance with linear dimensions and solid particles are distributed in given points of pulp.
Effect of centrifugal force in the "CMDC" and perforated plates starts the process of disintegration, i.e. distribution of solid part of pulp in given layers of pulp. There are several isolated flows of pulp with grouped solid particles of given linear dimensions leaving the "CMDC".
P aggr -~- Il ' Pdiv 1. aggr ~' n ' Ldiv S aggr -~' n ' Sdiv Where P aggr - aggregate pulp flow leaving a hydro-washing machine and entering the "CMDC".
P aiv - divided and separated pulp flow escaping the "CMDC" and containing solid particles grouped according to given linear dimensions L aggr- overall flow of liquid leaving a hydro-washing machine and entering the "CMDC".
L div - divided and separated flow of liquid escaping the "CMDC" and containing solid particles grouped according to given linear dimensions S aggr - overall flow of solid particles leaving a hydro-washing machine and entering the "CMDC".
S aiv- solid particles with given linear dimensions grouped in a separated flow just before leaving the "CMDC".
n - quantity of pulp flow leaving the "CMDC".
Action - gravitational precipitation of valuable component on the set of sluice boxes of shallow filling.
The set of gravitational sluice boxes of shallow filling connected with branch pipes to the «CMDC» is used for precipitation of valuable component.
Everyone sluice box of the set processes one isolated pulp flow containing solid particles of linear dimensions given by the program. The angle of its inclination depends from linear dimensions of solid particles being processed: sluice it is flattening with the diminution of solid particles linear dimensions.
0,1 > sin ai > sin a2 > ...sin an > 0,036.
The quantity of sluice boxes in the set is equal to the quantityr if isolated pulp flows leaving the "CMDC" for interrupted work of the device. The quantity of sluice boxes in the set is 2 times that of the pulp flows quantity for continuous work.
f6 Order of actions in the method 1. Output of aggregate pulp flow from hydro-washing machine is implemented via pulp pipeline.
2. The pulp acquires rotary motion when it is fed into the "CMDC" and moves spirally.
3. The "CMDC" includes the following processing:
a) screening of solid particles, b) disintegration of solid particles, c) classification according to the largest linear dimension, d) placing of solid particles of pulp at certain height and in given relative layers of pulp, e) isolation of pulp into separate flows, fj directing of each separate pulp flow to the corresponding body of the set of mufti-body sedimentary sluice boxes, g) removal on the ground of separate isolated pulp flow after its processing at gravitational sluice box.
Conditions for bringing to effect of actions 1. Mode of operation Due to the method pulp moves through the «CMDC» continuously. Pulp motion through the set of gravitational sluice boxes is also continuous due to transfernng of pulp flows from one line or row of sluice bodies to another. Processing of divided and separated pulp flows on the set of gravitational sluice boxes is also continuous due to alternate work of one line (row) of the sluice bodies to another.
It gives the possibility to gather the concentrate of valuable component from non-working sluice boxes.
2. The row material for the method work is aggregate pulp being fed from a hydro-washing machine.
3. Equipment for bringing to effect of the method are:
a) device "CMDC", b) set of gravitational sluice boxes.
1~
Graphic scheme of transformation of the rectilinear gravitational segmentation sluice box into centrifugal mixer-desintegrator-classifier.
Scheme N~ 1.
View of the sluice box from the inlet side: AB and CD - boards of sluice box, BC -bottom of sluice box.
Scheme N~2.
View of the sluice box from the inlet side: Gr - grids of the segmentation device.
Scheme Ns3.
View of the sluice box, topped by the cover AD, from the inlet side and on the long vertical section: P - pulp, Pl - pulp line.
Scheme Ns4.
View of the sluice box from the inlet side: 001- axle of rotation, R - radius of rotation.
Scheme Outlet of the sluice box equipped by the segmentation device and wound in spiral round the axle of rotation: ABCD - inlet of the sluice box, AiBiCIDi - outlet of the sluice box.
~8 r Method of producing of separate /isolated/ pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes.
Schame N.,~ Sa~er~e ~-°~
A
Gr ~ ~
8 a ~ c $e~ern~ l~'- 3 b i A.
Se~te~e N-~
C
A
Method of producing of separate /isolated/ pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice bores.
Sel~e~e N' ~
0 ~ t~
zo _...~,~. ~- , Field ~f t The method refers to the sphere of mining industry, namely extracting of valuable and rare earth metals and other solid minerals {diamonds).
Level of tech~i~
Presently mining industry broadly uses methods and devices based on gravity and centrifugal force usage, separately or in combination with each other and other forces under effect of industrial hydra-washing machines on the pulp. Remote analogues are methods used in Keelson concentrator (Canada), Ivankavsky separator (Russia), devices of Alaska series (USA), in spiral separators of Einley, Falcon concentrators. Prototypes and close analogues were not found by the author.
Prot~type.
The prototy~ of this r~tetl~od is the n~etl~ad of gravitational precipitation of . . .
from the pulp of industrial hyd-wa;~hing machines, earlier suggested by the same author. The new method reserves the main es ential signs of the previous one, but as a principal acting force for processing solid particles the centrifugal force was chosen. This centrifugal force can be adjusted and increased dozens and hundreds times, which ensures more productive work. In this method, the author provided for the possibility of continuous technological cycle.
The suggested method is very elective and according to theoretical perspective, it will decrease operating losses of gold by more than 6D%.
In addition, use of the method in extraction of platinum, minerals of platinum and rare earth groups is ensured a high economic benefit. It is highly efF~cient in extraction of fine diamonds. The method with other ones can be used in treatment of processed products from atomic electric power stations.
The further strategic development of the direction shown by the suggested method will help to get more efficient "know- how" in other spheres of industry.
.~~,~ ~ ~.~~.~
~u~khcrr ~'~ ~' ~~~ ,~ /AQ~ttaliy Kuzoet~wvl ,~o aa~~~
,Z~ ~=,_ i
Claims (23)
1. Speed of the aggregate pulp flow leaving a hydrowashing machine is 2 m/sec.
2. Conversing of rectilinear pulp motion into centrifugal one in the "CMDC".
3. Placing of solid particles with linear dimensions more than 0,3mm in the layers closer disposed near the internal wall at a moment of pulp feeding in the "CMDC" inlet.
4. Solid particles with linear dimensions less than 4 mm are processed in the "CMDC" according to the method.
5. Breaking up of sand and clay complexes by three- corned plates installed on perforated plates across the pulp movement.
6. Dividing of solid particles according to given linear dimensions by perforated plates.
7. Dimensions of meshes of perforated plates diminish from the axle of rotation to the external wall of the device.
8. Quantity of pulp layers after dividing of aggregate pulp flow by perforated plates is more than 3 ones, i.e. n > 3.
9. Angle .alpha. of perforated plates installation at upper and down spiral bands is 90°
(other variant are possible).
(other variant are possible).
10. Grouping of solid particles divided according to linear dimensions in given relative layers of pulp being processed in the "CMDC".
11.Keeping of solid particles divided according to linear dimensions in given relative layers of pulp being processed in the "CMDC".
12.Isolation of pulp layers containing solid particles with given linear dimensions in flows before they leave the "CMDC".
13.Feeding of divided and isolated pulp flows in corresponding body of the set of gravitational sluice boxes.
14.The set consists from sluice boxes of shallow filling.
15.Everyone of isolated pulp flow is processed in the corresponding sluice box, which is installed at individual angle a regarding the horizontal line.
16.This angle .alpha. of sluice inclination depends from linear dimensions of pulp solid particles being processed in this sluice box of the set.
17.Angles .alpha. of sluice inclination are regimented. They are flattening with the diminution of solid particles linear dimensions.
0,1 > sin .alpha.1 > sin .alpha.2 > ...sin .alpha.n > 0,036.
0,1 > sin .alpha.1 > sin .alpha.2 > ...sin .alpha.n > 0,036.
18.Diminution value of sin a is from the first sluice box body to the second one, from the second sluice box body to the third one and so on: .DELTA. sin .alpha. 0,008.
19.Difference interval of dividing diminishes from .DELTA. 0,8 mm to 0 0,1 mm.
OD -overall linear dimension.
N o Overall linear dimensions Difference ~~N o 9 K > OD ~~ 9 8 I > OD > H .DELTA.0,8 mm .fwdarw. 8 7 H > OD > G .DELTA.0,7 mm .fwdarw. 7 6 G > OD > F .DELTA.0,6 mm .fwdarw. 6 F > OD > E .DELTA.0,5 mm .fwdarw. 5 4 E > OD > D .DELTA.0,4 mm .fwdarw. 4 3 D > OD > C .DELTA.0,3 mm .fwdarw. 3 2 C > OD > B .DELTA.0,2 mm .fwdarw. 2 1 B > OD > A .DELTA.0,1 mm .fwdarw. 1 0 A ~~ 0
OD -overall linear dimension.
N o Overall linear dimensions Difference ~~N o 9 K > OD ~~ 9 8 I > OD > H .DELTA.0,8 mm .fwdarw. 8 7 H > OD > G .DELTA.0,7 mm .fwdarw. 7 6 G > OD > F .DELTA.0,6 mm .fwdarw. 6 F > OD > E .DELTA.0,5 mm .fwdarw. 5 4 E > OD > D .DELTA.0,4 mm .fwdarw. 4 3 D > OD > C .DELTA.0,3 mm .fwdarw. 3 2 C > OD > B .DELTA.0,2 mm .fwdarw. 2 1 B > OD > A .DELTA.0,1 mm .fwdarw. 1 0 A ~~ 0
20. A square mesh side or a round mesh diameter of classifier plate perforations are 4,0mm; 3,2mm; 2,5mm; 1,9mm; 1,4mm; 1,0mm; 0,7mm; 0,5mm; 0,4mm.
21.The quantity of sluice boxes in the set is equal to the quantity of isolated pulp flows leaving "CMDC" for interrupted work.
22. The quantity of sluice boxes in the set is 2 times that of the pulp flows quantity for continuous work.
23. The axle of spiral rotation is installed in limits from 0° to 90°, i. e.
0° < axle of rotation <= 90°.
0° < axle of rotation <= 90°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002497642A CA2497642A1 (en) | 2005-02-01 | 2005-02-01 | Method of producing of separate/isolated/pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002497642A CA2497642A1 (en) | 2005-02-01 | 2005-02-01 | Method of producing of separate/isolated/pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes |
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| Publication Number | Publication Date |
|---|---|
| CA2497642A1 true CA2497642A1 (en) | 2006-08-01 |
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ID=36764105
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|---|---|---|---|
| CA002497642A Abandoned CA2497642A1 (en) | 2005-02-01 | 2005-02-01 | Method of producing of separate/isolated/pulp flows containing solid particles with given linear dimensions from pulp of industrial hydro-washing machines with succeeding sedimentation of valuable heavy component from isolated pulp flows on the set of gravitational sluice boxes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819796A (en) * | 2019-11-18 | 2020-02-21 | 金川集团股份有限公司 | Rotary grating device for extraction box |
-
2005
- 2005-02-01 CA CA002497642A patent/CA2497642A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819796A (en) * | 2019-11-18 | 2020-02-21 | 金川集团股份有限公司 | Rotary grating device for extraction box |
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