CN106244266B - The method of water-coal-slurry and the water-coal-slurry of preparation are prepared with technology using form class is divided - Google Patents
The method of water-coal-slurry and the water-coal-slurry of preparation are prepared with technology using form class is divided Download PDFInfo
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Abstract
The invention provides a kind of water-coal-slurry and preparation method thereof, the preparation method of the water-coal-slurry includes：Slurry A, slurry B, slurry C and slurry D mixture are mixed with water and additive, pinch mixed, mixed slurry is obtained, then shear treatment, obtains water-coal-slurry；Wherein, the particle diameter of the coal dust in slurry A is 500~2400 μm；The particle diameter of coal dust in slurry B is 30~500 μm；10~30 μm of the particle diameter of coal dust in slurry C；Coal particle size≤10 μm in slurry D.The present invention instructs the brand-new pulping process of development process using graded crushing, point shape grinding and multistage research of grade-suit theory, realizes water-coal-slurry optimal granularity grading.Compared with other technologies, gasification energy consumption and production cost are reduced, improves available gas ratio, and expand the use range of raw material, 68 percentage points of coal-water fluid concentration can be improved, stability is good, and syneresis rate is less than 10% after standing 48 hours.
Description
Technical field
The invention belongs to the clean utilization technical field of coal resources, it is related to a kind of water-coal-slurry and preparation method thereof, especially
It is related to a kind of water-coal-slurry for preparing the method for water-coal-slurry with technology using point form class and being prepared.
Background technology
Water-coal-slurry (Coal Water Mixture, CWM) has obvious social economy and Environmental Effect in clean fuel
Benefit, meet China's richness coal, oil starvation, the national conditions of few gas and the energy strategy of realization " with coal for replacing oil ", be advantageous to urban sustainable development hair
Exhibition, in China, popularization and application has a extensive future.Environmental benefit, economic benefit and the energy-saving benefit of development water-coal-slurry have had just
The embodiment of step.
Water-coal-slurry not only can effectively solve " fuel oil is expensive, pollution that caused by coal burning " problem, may be used also as a kind of novel clean fuel
To change energy consumption structure, ensure economic security, water-coal-slurry is added by about 70% coal, 29% water and 1% chemistry
Agent, it is made through certain processing technology, its outward appearance picture oil.It can be stored with tank body and pipeline pumps, can be in Industrial Boiler, power station pot
Stove, Industrial Stoves previous generation oil, gas, coal use, and have the protrusion such as efficient, energy-conservation, low stain, low operating cost and storage safety excellent
Point.
Although there are certain methods to attempt to improve the concentration of water-coal-slurry in the prior art, such as, by controlling in water-coal-slurry
The size distribution of coal improves the concentration of water-coal-slurry to improve, however, in existing application, by adjusting the size distribution of coal simultaneously
The concentration of water-coal-slurry is reached desired value, moreover, with the rise of coal concentration in water-coal-slurry, also results in water-coal-slurry and produce not
It is expected to be not easy to the viscosity applied, thus be necessary to develop the good water coal of a kind of new high concentration, appropriate viscosity and stability
Slurry and preparation method thereof.
The A of CN 103374423 disclose a kind of water-coal-slurry and preparation method thereof, and the water-coal-slurry includes first, second and the
Three particulate coals, the first particulate coal is in 20~50wt% of ature of coal amount in water-coal-slurry, and its particle diameter is less than 44 microns；Second particle
Coal is in 20~80% of ature of coal amount in water-coal-slurry, and its particle diameter is at 44~420 microns；3rd particulate coal is in coal in water-coal-slurry
The 10~40% of quality, and its particle diameter is in the range of 420~1000 microns.The water-coal-slurry has preferable mobility and higher
Coal concentration, such as 60%, still, the deposition efficiency of obtained water-coal-slurry is low, and the concentration of water-coal-slurry is low, and syneresis rate is high and stably
Property is poor, is not suitable for all coals.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of new water-coal-slurry and preparation method thereof,
This method utilizes point form class to realize the successful preparation by coal raw material to high-concentration coal-water slurry with technology, is filled with coal particle accumulation
When space, improve deposition efficiency, so as to improve the concentration of water-coal-slurry and stability, the concentration of water-coal-slurry of the invention exists
65~80%, syneresis rate is less than 10% after standing 48 hours.
In a first aspect, the present invention provides a kind of preparation method of water-coal-slurry, methods described comprises the following steps：
Slurry A, slurry B, slurry C and slurry D mixture are mixed with water and additive, pinch it is mixed obtain mixed slurry,
Then shear treatment, water-coal-slurry is obtained, wherein, the particle diameter of the coal dust in slurry A is 500~2400 μm, the coal dust in slurry B
Particle diameter is 30~500 μm, 10~30 μm of the particle diameter of the coal dust in slurry C, particle diameter≤10 μm of the coal dust in slurry D.
In the present invention, the particle diameter of the coal dust in slurry A is 500~2400 μm, for example, can be 500 μm, 600 μm, 800 μm,
950 μm, 1000 μm, 1200 μm, 1350 μm, 1500 μm, 1750 μm, 1850 μm, 2000 μm, 2100 μm, 2200 μm, 2300 μm or
2400 μm etc..
In the present invention, the particle diameter of the coal dust in slurry B is 30~500 μm, for example, can be 30 μm, 50 μm, 65 μm, 80 μm,
100μm、120μm、135μm、150μm、165μm、180μm、200μm、220μm、240μm、260μm、280μm、300μm、330μ
M, 350 μm, 375 μm, 400 μm, 450 μm or 500 μm etc..
In the present invention, 10~30 μm of the particle diameter of the coal dust in slurry C, such as can be 10 μm, 12 μm, 15 μm, 17 μm, 20 μ
M, 24 μm, 28 μm or 30 μm etc..
In the present invention, particle diameter≤10 μm of the coal dust in slurry D, such as can be 10 μm, 9 μm, 8 μm, 6 μm, 5 μm, 4 μm, 3
μm, 2 μm or 1 μm etc..
Preferably, the coal dust in the slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
Mass ratio is (60~84):(10~20):(5~10):(1~10).
Preferably, the coal dust in the slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
Particle diameter differs.
Preferably, the mass ratio of slurry A, slurry B, slurry C and slurry D gross mass and water and additive for (70~
80):(20~30):(0.1~0.5).
Preferably, the solid content of the slurry A is 80wt%.
Preferably, the additive is any in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
It is a kind of or at least two mixture, such as can be the mixture of lignosulfonates and humate, lignosulfonates and
The mixture of naphthalene sulfonic acid-formaldehyde condensation product, the mixture of lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product etc..
Preferably, the shear treatment is sheared to strengthen, and the shearing rate of the shear treatment is 60~120r/min, such as
Can be 60r/min, 70r/min, 80r/min, 85r/min, 90r/min, 100r/min, 110r/min, 115r/min or 120r/
Min etc..
In the present invention, by slurry A, slurry B, slurry C and the slurry D from proper amount of specific coal particle size, with spy
The additive and water for determining species are used cooperatively, and concentration height, modest viscosity, the good water-coal-slurry of stability, water-coal-slurry has been prepared
Concentration 65~80%, relative to the water-coal-slurry of prior art, concentration improves 6~8 percentage points；Viscosity 1000~
1400mpa·s(100S-1), it is easy to practical application；And syneresis rate is less than 10% after standing 48 hours.
As the optimal technical scheme of the preparation method of water-coal-slurry of the present invention, a kind of preparation method of water-coal-slurry, institute
The method of stating comprises the following steps：
(1) coal raw material is crushed, obtains the first slurry；
(2) the first slurry is divided into slurry I and slurry II, slurry I is mixed with water and carries out shaping corase grind, obtains the second slurry
Expect, the granularity of the coal dust in second slurry is 500~2400 μm；
(3) slurry II is mixed with water and additive and carries out shaping fine grinding, obtain the 3rd slurry, in the 3rd slurry
The granularity of coal dust is 30~500 μm；
(4) the second slurry is dehydrated, obtains slurry A and recirculated water, wherein, the coal dust in slurry A accounts for the first slurry
In coal dust quality 60~84wt%；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
10~20wt% of quality of pc；5~10wt% of the quality of pc that the coal dust in slurry IV is accounted in the first slurry；In slurry V
1~10wt% of quality of pc for accounting in the first slurry of coal dust, to slurry III without processing, directly as slurry B；To slurry
Material IV and slurry V carry out Ultrafine Grinding and obtain slurry C and slurry D respectively；
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinches mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For (60~84):(10~20):(5~10)：(1~10)；
(7) mixed slurry is sheared, obtains water-coal-slurry.
In the present invention, the gross mass of slurry I and slurry II is the quality of the first slurry.
Preferably, when step (1) is described broken, the particle diameter≤13mm for the coal dust being crushed in obtained the first slurry, example
Such as can be 12mm, 11mm, 10mm, 8mm, 7mm, 5mm, 3mm, 2mm or 1mm.
Preferably, step (2) the shaping corase grind is roughly ground for shaping wet method, in the shaping wet method rough grinding pass, shaping
The solid content of material of wet method corase grind be 40~60wt%, for example, can for 40wt%, 42wt%, 45wt%, 48wt%,
50wt%, 53wt%, 55wt% or 60wt% etc..
Preferably, step (2) slurry I and water are according to (7~8):The mass ratio of (2~3) is mixed, mass ratio
Such as can be 7:3、7.2:2.8、7.5:2.5、7.8:2.2 or 8:2 etc..
Preferably, step (3) the shaping fine grinding is shaping wet method fine grinding, during the shaping wet method fine grinding, shaping
The solid content of the material of wet method fine grinding is 40~60wt%, for example, can be 40wt%, 43wt%, 45wt%, 46wt%,
48wt%, 50wt%, 53wt%, 55wt% or 60wt% etc..
Preferably, step (3) slurry II, water and the additive is according to (70~80):(20~30):(0.1~0.5)
Mass ratio is mixed, and mass ratio such as can be 70:30:0.1、70:30:0.5、73:27:0.2、73:27:0.4、75:25:
0.3、75:25:0.5、78:22:0.3、78:22:0.5、80:20:0.1、80:20:0.3 or 80:20:0.5 etc..
Preferably, step (4) slurry A solid content is 80wt%.
Preferably, step (5) described Ultrafine Grinding is wet method fine grinding, during the wet method fine grinding, super wet method super-fine
The solid content of the material of mill is 40~60wt%, for example, can be 40wt%, 45wt%, 47wt%, 750wt%, 53wt%,
55wt% or 60wt% etc..
Preferably, the device that step (2) the shaping corase grind and step (3) the shaping fine grinding use independently is sleeping
Any one in formula rod mill, horizontal ball mill, Horizontal stirring mill, vertical ball mill or vertical stirring mill or at least two
Combination.
Preferably, step (5) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, step (3) and step (6) described additive independently are lignosulfonates, humate or naphthalene
In sulfonic formaldehyde condensation compound any one or at least two mixture.
As the optimal technical scheme of the preparation method of water-coal-slurry of the present invention, a kind of preparation method of water-coal-slurry, institute
The method of stating is added in the raw material of shaping fine grinding after being additionally included in step (2) using a part of second slurry as the return of slurry I '
The step of, wherein, 0~20wt% of the quality of pc that the coal dust in slurry I ' is accounted in the first slurry.
In this optimal technical scheme, it is admixed together to return to the second slurry and slurry II, water and the additive of addition, carries out
Shaping fine grinding.
Preferably, the water used in the present invention can be production clear water, can also be recirculated water caused by step (4),
It can also be the mixed liquor of production clear water and recirculated water.But the above-mentioned water enumerated is not limited to, other kinds of water also can use
In the present invention.
Caused recirculated water in step (4) of the present invention, it not only may return to step (2), step (3) and step (6) and enter
Row recycles, and is also used as other industrial treatment water.
Second aspect, the present invention provide the water-coal-slurry that method as described in relation to the first aspect is prepared.
Compared with the prior art, the invention has the advantages that：
1) present invention instructs brand-new pulping process and equipment to open using graded crushing, point shape grinding and multistage research of grade-suit theory
Hair, realizes water-coal-slurry optimal granularity grading, and the water-coal-slurry for making to be prepared has concentration is high, viscosity is suitable and stability is good etc.
Feature.The present invention technology compared with conventional process techniques, can improve available gas ratio, reduce project construction investment,
Production run cost and gasification and energy consumption are reduced, the pulping energy consumption of water-coal-slurry of the present invention is in 13~15kwh, relative to tradition
Technology reduces about 30%；And the scope of application of raw material is expanded to a greater degree, raw material can be extended to each coal, orchid
Charcoal and petroleum coke etc..
2) concentration of water-coal-slurry of the invention is 65~80%, and relative to the water-coal-slurry of prior art, concentration improves 6~
8 percentage points；Viscosity is in 1000~1400mpas (100S-1), it is easy to practical application；And syneresis rate is less than after standing 48 hours
10%.
(3) method of the present invention is remarkably improved water-coal-slurry deposition efficiency, and then improves water coal slurry concentration.For each
Kind coal has good universality, for the good coal of paste-forming properties (such as petroleum coke and anthracite), even if requiring to reduce
Also coal-water fluid concentration can be improved in the case of particle diameter to 65~80%；For coal (such as lignite, jet coal and weak viscous of paste-forming properties difference
The low-order coals such as coal) for, although the high paste-forming properties of interior water content are poor, it can still improve coal slurry using this method of the invention and accumulate
Efficiency and concentration, make concentration reach 65~80%.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment 1
A kind of method for preparing water-coal-slurry as coal raw material by shenfu coal, shenfu coal is a kind of common coal in Inner Mongolia,
It is 4.9% to analyze water, and full water is 13%, ash content 13.9%.
Methods described comprises the following steps：
(1) coal raw material is crushed and obtains granularity≤13mm the first slurry；
(2) the first slurry is divided into slurry I and slurry II, the quality of pc that the coal dust in slurry I is accounted in the first slurry
75wt%, the 25wt% for the quality of pc that the coal dust in slurry II is accounted in the first slurry, by slurry I and water in mass ratio 7:3 enter
Row shaping wet method is roughly ground to obtain the second slurry that coal powder size is 2000 μm；
(3) a part of second slurry is returned as slurry I ' and be added in the raw material of shaping wet ball grinding (in slurry I '
The 5wt% of quality of pc that accounts in the first slurry of coal dust), and mixed with slurry II, water and additive, it is thin to carry out shaping wet method
Mill obtains the 3rd slurry that coal powder size is 400 μm, wherein, the mass ratio of slurry II, water and additive is 70:30:0.1；
(4) the second pulp concentration is dehydrated, solids content control 80% material as slurry A, the coal dust in slurry A
The 70wt% of the quality of pc accounted in the first slurry；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
The 15wt% of quality of pc；The 10wt% for the quality of pc that coal dust in slurry IV is accounted in the first slurry；Coal dust in slurry V
The 5wt% of the quality of pc accounted in the first slurry, to slurry III without processing, directly as slurry B；Slurry IV is surpassed
Coal particle size in the slurry for being finely ground to obtain is 25 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry for being milled to obtain
Coal particle size be 5 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinch mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For 70:15:10:5；
Slurry A, slurry B, slurry C and slurry D total amount, the mass ratio of water and additive are 70:30:0.1；
(7) mixed slurry is strengthened with 100r/min shearings rate and sheared, and output equipment obtains water-coal-slurry.
After testing, it is 79.5% to obtain water-coal-slurry product design, viscosity 1100mpas (100S-1), have good stability, it is quiet
Only syneresis rate is less than 5% after 48 hours.
Embodiment 2
A kind of method for preparing water-coal-slurry as coal raw material by Xinjiang Red Hill coal, Red Hill coal are that Xinjiang region one kind is common
Coal, full water are 24%, ash content 14%.
Methods described comprises the following steps：
(1) coal raw material is crushed and obtains granularity≤13mm the first slurry；
(2) the first slurry is divided into slurry I and slurry II, the quality of pc that the coal dust in slurry I is accounted in the first slurry
80wt%, the 20wt% for the quality of pc that the coal dust in slurry II is accounted in the first slurry, by slurry I and water in mass ratio 8:2 enter
Row shaping wet method is roughly ground to obtain the second slurry that coal powder size is 1000 μm；
(3) slurry II, water and additive are pressed 70:30:0.1 mass ratio mixing carries out shaping wet method fine grinding and obtains coal dust
Granularity is 100 μm of the 3rd slurry；
(4) second pulp concentrations are dehydrated, solids content control 80% material as slurry A, the coal dust in slurry A accounts for
The 80wt% of quality of pc in first slurry；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
The 10wt% of quality of pc；The 5wt% for the quality of pc that coal dust in slurry IV is accounted in the first slurry；Coal dust in slurry V accounts for
The 5wt% of quality of pc in first slurry, to slurry III without processing, directly as slurry B；Slurry IV is carried out ultra-fine
Coal particle size in the slurry for being milled to obtain is 25 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry for being milled to obtain
Coal particle size is 10 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinch mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For 80:10:5:5；
Slurry A, slurry B, slurry C and slurry D total amount, the mass ratio of water and additive are 70:30:0.1；
(7) mixed slurry is strengthened with 80r/min shearings rate and sheared, and output equipment obtains water-coal-slurry.
After testing, it is 73.8% to obtain water-coal-slurry product design, viscosity 1050mpas (100S-1), have good stability, it is quiet
Only syneresis rate is less than 10% after 48 hours.In preparation process of the present invention by the way of wet method shearing grinding, the slurrying of water-coal-slurry
Energy consumption is 13~15kwh, and energy consumption can reduce by 30%, reduce slurrying cost.
Embodiment 3
A kind of method for preparing water-coal-slurry as coal raw material by lignite, lignite is a kind of common coal in Inner Mongolia, analysis
Water is 20.8%, and full water is 34.5%, ash content 8.5%.
Methods described comprises the following steps：
(1) coal raw material is crushed and obtains granularity≤13mm the first slurry；
(2) the first slurry is divided into slurry I and slurry II, the quality of pc that the coal dust in slurry I is accounted in the first slurry
85wt%, the 15wt% for the quality of pc that the coal dust in slurry II is accounted in the first slurry, by slurry I and water in mass ratio 7:3 enter
Row shaping wet method is roughly ground to obtain the second slurry that coal powder size is 600 μm；
(3) a part of second slurry is returned as slurry I ' and be added in the raw material of shaping wet ball grinding (in slurry I '
The 20wt% of quality of pc that accounts in the first slurry of coal dust), and mixed with slurry II, water and additive, carry out shaping wet method
Fine grinding obtains the 3rd slurry that coal powder size is 80 μm, wherein, the mass ratio of slurry II, water and additive is 70:30:0.1；
(4) second pulp concentrations are dehydrated, solids content control 80% material as slurry A, the coal dust in slurry A accounts for
The 65wt% of quality of pc in first slurry；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
The 15wt% of quality of pc；The 10wt% for the quality of pc that coal dust in slurry IV is accounted in the first slurry；Coal dust in slurry V
The 10wt% of the quality of pc accounted in the first slurry, to slurry III without processing, directly as slurry B；Slurry IV is carried out
Coal particle size in the ultra-fine slurry for being milled to obtain is 25 μm, as slurry C；The ultra-fine slurry for being milled to obtain is carried out to slurry V
In coal particle size be 3 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinch mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For 65:15:10:10；
Slurry A, slurry B, slurry C and slurry D total amount, the mass ratio of water and additive are 70:30:0.1；
(7) mixed slurry is strengthened with 120r/min shearings rate and sheared, and output equipment obtains water-coal-slurry.
After testing, it is 68.1% to obtain water-coal-slurry product design, viscosity 1005mpas (100S-1), have good stability, it is quiet
Only syneresis rate is less than 5% after 48 hours.
Embodiment 4
A kind of method for preparing water-coal-slurry as coal raw material by shenfu coal, shenfu coal is a kind of common coal in Inner Mongolia,
It is 4.9% to analyze water, and full water is 13%, ash content 13.9%.
Methods described comprises the following steps：
(1) coal raw material is crushed and obtains granularity≤13mm the first slurry；
(2) the first slurry is divided into slurry I and slurry II, the quality of pc that the coal dust in slurry I is accounted in the first slurry
85wt%, the 15wt% for the quality of pc that the coal dust in slurry II is accounted in the first slurry, by slurry I and water in mass ratio 7.5:
2.5 progress shaping wet methods are roughly ground to obtain the second slurry that coal powder size is 2400 μm；
(3) a part of second slurry is returned as slurry I ' and be added in the raw material of shaping wet ball grinding (in slurry I '
The 2wt% of quality of pc that accounts in the first slurry of coal dust), and mixed with slurry II, water and additive, it is thin to carry out shaping wet method
Mill obtains the 3rd slurry that coal powder size is 200 μm, wherein, the mass ratio of slurry II, water and additive is 80:20:0.3；
(4) the second pulp concentration is dehydrated, solids content control 80% material as slurry A, the coal dust in slurry A
The 83wt% of the quality of pc accounted in the first slurry；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
The 10wt% of quality of pc；The 5wt% for the quality of pc that coal dust in slurry IV is accounted in the first slurry；Coal dust in slurry V accounts for
The 2wt% of quality of pc in first slurry, to slurry III without processing, directly as slurry B；Slurry IV is carried out ultra-fine
Coal particle size in the slurry for being milled to obtain is 15 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry for being milled to obtain
Coal particle size is 8 μm, as slurry D.
(6) it and will be mixed with slurry A, slurry B, slurry C, slurry D, water and additive, pinch mixed, obtain mixing slurry
Material；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For 83:10:5:2；
Slurry A, slurry B, slurry C and slurry D total amount, the mass ratio of water and additive are 70:30:0.5；
(7) mixed slurry is strengthened with 75r/min shearings rate and sheared, and output equipment obtains water-coal-slurry.
After testing, it is 68.3%% to obtain water-coal-slurry product design, viscosity 1200mpas (100S-1), have good stability,
Syneresis rate is less than 5% after static 48 hours.
Embodiment 5
A kind of method for preparing water-coal-slurry as coal raw material by lignite, lignite is a kind of common coal in Inner Mongolia, analysis
Water is 20.8%, and full water is 34.5%, ash content 8.5%.
Methods described comprises the following steps：
(1) coal raw material is crushed and obtains granularity≤13mm the first slurry；
(2) the first slurry is divided into slurry I and slurry II, the quality of pc that the coal dust in slurry I is accounted in the first slurry
85wt%, the 15wt% for the coal dust gross mass that the coal dust in slurry II is accounted in the first slurry, by slurry I and water in mass ratio 7:3
Shaping wet method is carried out to roughly grind to obtain the second slurry that coal powder size is 800 μm；
(3) a part of second slurry is returned as slurry I ' and be added in the raw material of shaping wet ball grinding (in slurry I '
The 10wt% of quality of pc that accounts in the first slurry of coal dust), and mixed with slurry II, water and additive, carry out shaping wet method
Fine grinding obtains the 3rd slurry that coal powder size is 50 μm, wherein, the mass ratio of slurry II, water and additive is 75:25:0.1；
(4) second pulp concentrations are dehydrated, solids content control 80% material as slurry A, the coal dust in slurry A accounts for
The 75wt% of quality of pc in first slurry；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust in slurry III is accounted in the first slurry
The 19wt% of quality of pc；The 5wt% for the quality of pc that coal dust in slurry IV is accounted in the first slurry；Coal dust in slurry V accounts for
The 1wt% of quality of pc in first slurry, to slurry III without processing, directly as slurry B；Slurry IV is carried out ultra-fine
Coal particle size in the slurry for being milled to obtain is 10 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry for being milled to obtain
Coal particle size is 4 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinch mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D
For 75:19:5:1；
Slurry A, slurry B, slurry C and slurry D total amount, the mass ratio of water and additive are 80:20:0.5；
(7) mixed slurry is strengthened with 60r/min shearings rate and sheared, and output equipment obtains water-coal-slurry.
After testing, it is 65.9% to obtain water-coal-slurry product design, viscosity 1010mpas (100S-1), have good stability, it is quiet
Only syneresis rate is less than 5% after 48 hours.
Applicant states that the present invention illustrates the method detailed of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned method detailed, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implemented.Art
Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., within the scope of all falling within protection scope of the present invention and disclosing.
Claims (19)
1. a kind of preparation method of water-coal-slurry, it is characterised in that the described method comprises the following steps：
It is slurry C and grain by slurry A, the slurry B that particle diameter is 30~500 μm, 10~30 μm of particle diameter that particle diameter is 500~2400 μm
The slurry D of footpath≤10 μm mixture mixes with water and additive, pinches mixed, obtains mixed slurry, then shear treatment, obtains water
Coal slurry；
Specifically include following steps：
(1) coal raw material is crushed, obtains the first slurry；
(2) the first slurry is divided into slurry I and slurry II, slurry I is mixed with water and carries out shaping corase grind, obtains the second slurry,
The granularity of coal dust in second slurry is 500~2400 μm；
(3) slurry II is mixed with water and additive and carries out shaping fine grinding, obtain the 3rd slurry, the coal dust in the 3rd slurry
Particle diameter be 30~500 μm；
(4) the second slurry is dehydrated, obtains slurry A and recirculated water；
(5) the 3rd slurry is divided into slurry III, slurry IV and slurry V, and the coal dust that the coal dust in slurry III is accounted in the first slurry
10~20wt% of quality；5~10wt% of the quality of pc that the coal dust in slurry IV is accounted in the first slurry；Coal in slurry V
1~10wt% of the quality of pc that powder is accounted in the first slurry, to slurry III without processing, directly as slurry B；To slurry IV
Carry out Ultrafine Grinding respectively with slurry V and obtain slurry C and slurry D；
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, pinches mixed, obtain mixed slurry；
Wherein, the mass ratio of the coal dust in slurry A, the coal dust in slurry B, the coal dust in slurry C and the coal dust in slurry D is
(60~84):(10~20):(5~10):(1~10)；
(7) mixed slurry is sheared, obtains water-coal-slurry.
2. according to the method for claim 1, it is characterised in that slurry A, slurry B, the grain of slurry C and the coal dust in slurry D
Footpath differs.
3. according to the method for claim 1, it is characterised in that slurry A, slurry B, slurry C and slurry D gross mass and water
Mass ratio with additive is (70~80):(20~30):(0.1~0.5).
4. according to the method for claim 1, it is characterised in that the solid content of the slurry A is 80wt%.
5. according to the method for claim 1, it is characterised in that the additive is selected from lignosulfonates, humate
In naphthalene sulfonic acid-formaldehyde condensation product any one or at least two mixture.
6. according to the method for claim 1, it is characterised in that the shearing rate of the shear treatment is 60~120r/min.
7. according to the method for claim 1, it is characterised in that when step (1) is described broken, be crushed to the first obtained slurry
Particle diameter≤13mm of coal dust in material.
8. according to the method for claim 1, it is characterised in that step (2) the shaping corase grind is roughly ground for shaping wet method, institute
State in shaping wet method rough grinding pass, the solid content of the material of shaping wet method corase grind is 40~60wt%.
9. according to the method for claim 1, it is characterised in that step (2) slurry I is with water according to (7~8):(2~
3) mass ratio is mixed.
10. according to the method for claim 1, it is characterised in that step (3) the shaping fine grinding is shaping wet method fine grinding,
During the shaping wet method fine grinding, the solid content of the material of shaping wet method fine grinding is 40~60wt%.
11. according to the method for claim 1, it is characterised in that step (3) slurry II, water and the additive are according to (70
~80):(20~30):The mass ratio of (0.1~0.5) is mixed.
12. according to the method for claim 1, it is characterised in that step (4) slurry A solid content is 80wt%.
13. according to the method for claim 1, it is characterised in that step (5) described Ultrafine Grinding is wet method fine grinding, described
During wet method fine grinding, the solid content of the material of super wet method fine grinding is 40~60wt%.
14. according to the method for claim 1, it is characterised in that step (2) the shaping corase grind and step (3) are described whole
The device that shape fine grinding uses independently is horizontal rod mill, horizontal ball mill, Horizontal stirring mill, vertical ball mill or vertical stirred
Mix in grinding machine any one or at least two combination.
15. according to the method for claim 1, it is characterised in that step (5) described Ultrafine Grinding using vertical mixing mill and/
Or Horizontal stirring mill.
16. according to the method for claim 1, it is characterised in that step (3) and step (6) described additive are independently
For any one in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product or at least two mixture.
17. according to the method described in claim any one of 1-16, it is characterised in that methods described be additionally included in step (2) it
A part of second slurry is returned to the step being added in the raw material of shaping fine grinding afterwards, wherein, in a part of second slurry
0~20wt% of quality of pc for accounting in the first slurry of coal dust.
18. according to the method described in claim any one of 1-16, it is characterised in that the step (2), step (3) and step
(6) water is recirculated water caused by production clear water and/or step (4).
19. the water-coal-slurry being prepared using the method described in claim any one of 1-16.
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| CN107502395B (en) * | 2017-09-07 | 2019-03-08 | 江苏天脉化工有限公司 | A kind of preparation method of water-coal-slurry |
| CN108865305A (en) * | 2018-06-25 | 2018-11-23 | 陕西延长石油（集团）有限责任公司 | A kind of coal and its preparation method using coal particle size gradation |
| CN109022074B (en) * | 2018-09-07 | 2020-12-29 | 煤科院节能技术有限公司 | Coal water slurry adopting discontinuous particle size distribution and preparation method thereof |
| CN111154522A (en) * | 2020-01-10 | 2020-05-15 | 陕西神渭煤炭管道运输有限责任公司 | Equipment for preparing pipe coal slurry and preparation method thereof |
| CN111534342A (en) * | 2020-04-27 | 2020-08-14 | 深圳瑞科天启科技有限公司 | High-concentration coal water slurry and preparation method and application thereof |
| CN111530564B (en) * | 2020-06-03 | 2021-02-26 | 北煤化(北京)科技有限公司 | High-concentration high-fluidity ore pulp and preparation method thereof |
| CN113368971A (en) * | 2021-06-11 | 2021-09-10 | 江苏恒丰能环科技股份有限公司 | Method for changing pulping process of rod mill |
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