CN106244266A - Fractal grating technology is utilized to prepare the method for water-coal-slurry and the water-coal-slurry of preparation - Google Patents
Fractal grating technology is utilized to prepare the method for water-coal-slurry and the water-coal-slurry of preparation Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
Abstract
The invention provides a kind of water-coal-slurry and preparation method thereof, the preparation method of described water-coal-slurry includes: is mixed with water and additive by the mixture of slurry A, slurry B, slurry C and slurry D, pinches mixed, obtain mixed slurry, then shear treatment, obtain water-coal-slurry；Wherein, the particle diameter of the coal dust in slurry A is 500～2400 μm；The particle diameter of the coal dust in slurry B is 30～500 μm；Particle diameter 10～30 μm of the coal dust in slurry C；Coal particle size≤10 μm in slurry D.The present invention utilizes graded crushing, fractal grinding and multistage research of grade-suit theory to instruct the brand-new pulping process of development process, it is achieved that water-coal-slurry optimal granularity grating.Compared with other Technologies, reducing gasification energy consumption and production cost, improve available gas ratio, and expand the range of raw material, can improve coal-water fluid concentration 68 percentage points, good stability, after standing 48 hours, syneresis rate is less than 10%.
Description
Technical field
The invention belongs to the clean utilization technical field of coal resources, relate to a kind of water-coal-slurry and preparation method thereof, especially
Relate to a kind of utilizing the method that fractal grating technology prepares water-coal-slurry and the water-coal-slurry prepared.
Background technology
Water-coal-slurry (Coal Water Mixture, CWM) has obvious social economy and Environmental Effect in cleaning fuel
Benefit, meets China's richness coal, oil starvation, the national conditions of few gas and realizes the energy strategy of " with coal for replacing oil ", and beneficially urban sustainable development is sent out
Exhibition, having a extensive future of China's popularization and application.At the beginning of the environmental benefit of developing water coal slurry, economic benefit and energy-saving benefit have had
The embodiment of step.
Water-coal-slurry, as a kind of novel clean fuel, is possible not only to effectively to solve " fuel oil expensive, pollution that caused by coal burning " problem, also may be used
To change energy consumption structure, to ensure economic security, water-coal-slurry is the chemistry interpolation of the coal by about 70%, the water of 29% and 1%
Agent, makes through certain processing technique, its outward appearance picture oil.Available tank body stores and pipeline pumps, can be at Industrial Boiler, power station pot
Stove, Industrial Stoves previous generation oil, gas, coal use, and have efficient, energy-conservation, low stain, low operating cost and storage safety etc. prominent excellent
Point.
Although prior art there being certain methods attempt improving the concentration of water-coal-slurry, such as, by controlling in water-coal-slurry
The particle size distribution of coal improves the concentration improving water-coal-slurry, but, in existing application, by adjusting the particle size distribution of coal also
The concentration not making water-coal-slurry reaches expected value, and, with the rising of coal concentration in water-coal-slurry, also results in water-coal-slurry and produce not
Expect to be not easy to the viscosity of application, thus be necessary to develop the water coal of a kind of novel high concentration, appropriate viscosity and good stability
Slurry and preparation method thereof.
CN 103374423 A discloses a kind of water-coal-slurry and preparation method thereof, and this water-coal-slurry includes first, second and the
Three particulate coal, 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 granule
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.This water-coal-slurry has preferable mobility and higher
Coal concentration, such as 60%, but, the deposition efficiency of the water-coal-slurry obtained is low, and the concentration of water-coal-slurry is low, and syneresis rate is high and stable
Property is poor, is not suitable for all coals.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of novel water-coal-slurry and preparation method thereof,
The method utilizes fractal grating technology to achieve to be prepared by the success of coal raw material to high-concentration coal-water slurry, is filled with coal particle and piles up
Time space, improve deposition efficiency, thus improve concentration and the stability of water-coal-slurry, the concentration of the water-coal-slurry of the present invention exists
65～80%, after standing 48 hours, syneresis rate is less than 10%.
First aspect, the present invention provides the preparation method of a kind of water-coal-slurry, described method to comprise the steps:
The mixture of slurry A, slurry B, slurry C and slurry D is mixed with water and additive, pinches and mixed obtain mixed slurry,
Then shear treatment, obtains water-coal-slurry, and 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, particle diameter 10～30 μm 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, can be such as 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, can be such as 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, particle diameter 10～30 μm 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, can be such as 10 μm, 9 μm, 8 μm, 6 μm, 5 μm, 4 μm, 3
μm, 2 μm or 1 μm etc..
Preferably, coal dust in the coal dust in described slurry A, the coal dust in slurry B, the coal dust in slurry C and slurry D
Mass ratio is (60～84): (10～20): (5～10): (1～10).
Preferably, coal dust in the coal dust in described slurry A, the coal dust in slurry B, the coal dust in slurry C and slurry D
Particle diameter all differs.
Preferably, the mass ratio of the gross mass of slurry A, slurry B, slurry C and slurry D and water and additive be (70～
80): (20～30): (0.1～0.5).
Preferably, the solid content of described slurry A is 80wt%.
Preferably, any in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product of described additive
A kind of or the mixture of at least two, such as, can be the mixture of lignosulfonates and humate, lignosulfonates and
The mixture of naphthalene sulfonic acid-formaldehyde condensation product, the mixture etc. of lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product.
Preferably, described shear treatment is sheared for strengthening, and the shear rate of described 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 selecting the slurry A of proper amount of specific coal particle size, slurry B, slurry C and slurry D, with spy
Determine the additive of kind and water with the use of, prepared that concentration is high, modest viscosity, the water-coal-slurry of good stability, water-coal-slurry
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 simple to actual 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, the preparation method of a kind of water-coal-slurry, institute
The method of stating comprises the following steps:
(1) coal raw material is crushed, obtain 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, obtain the second slurry
Material, the granularity of the coal dust in described second slurry is 500～2400 μm；
(3) slurry II is mixed with water and additive carry out shaping fine grinding, obtain the 3rd slurry, in described 3rd slurry
The granularity of coal dust is 30～500 μm；
(4) being dehydrated by the second slurry, obtain slurry A and recirculated water, wherein, the coal dust in slurry A accounts for the first slurry
In coal dust quality 60～84wt%；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 10～20wt% of quality of pc；Coal dust in slurry IV accounts for 5～10wt% of the quality of pc in the first slurry；In slurry V
Coal dust account for 1～10wt% of the quality of pc in the first slurry, slurry III is not processed, directly as slurry B；To slurry
Material IV and slurry V carry out Ultrafine Grinding respectively and obtain slurry C and 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 (60～84): (10～20): (5～10): (1～10)；
(7) mixed slurry is sheared, obtain water-coal-slurry.
In the present invention, the gross mass of slurry I and slurry II is the quality of the first slurry.
Preferably, step (1) described broken time, the particle diameter≤13mm of the coal dust being crushed in the first slurry obtained, example
As being 12mm, 11mm, 10mm, 8mm, 7mm, 5mm, 3mm, 2mm or 1mm etc..
Preferably, step (2) described shaping corase grind is roughly ground for shaping wet method, in described shaping wet method rough grinding pass, and shaping
The solid content of material of wet method corase grind is 40～60wt%, can be such as 40wt%, 42wt%, 45wt%, 48wt%,
50wt%, 53wt%, 55wt% or 60wt% etc..
Preferably, step (2) described slurry I with water according to (7～8): the mass ratio of (2～3) mixes, mass ratio
As being 7:3,7.2:2.8,7.5:2.5,7.8:2.2 or 8:2 etc..
Preferably, step (3) described shaping fine grinding is shaping wet method fine grinding, during described shaping wet method fine grinding, and shaping
The solid content of the material of wet method fine grinding is 40～60wt%, can be such as 40wt%, 43wt%, 45wt%, 46wt%,
48wt%, 50wt%, 53wt%, 55wt% or 60wt% etc..
Preferably, step (3) described slurry II, water and additive are according to (70～80): (20～30): (0.1～0.5)
Mass ratio mixes, and mass ratio can be such as 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, the solid content of step (4) described slurry A is 80wt%.
Preferably, step (5) described Ultrafine Grinding is wet method fine grinding, during described wet method fine grinding, and super wet method super-fine
The solid content of material of mill is 40～60wt%, can be such as 40wt%, 45wt%, 47wt%, 750wt%, 53wt%,
55wt% or 60wt% etc..
Preferably, the device that step (2) described shaping corase grind and step (3) described shaping fine grinding use all independently be sleeping
Any one or at least two in formula rod mill, horizontal ball mill, Horizontal stirring mill, vertical ball mill or vertical stirring mill
Combination.
Preferably, step (5) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, step (3) and step (6) described additive all independently be lignosulfonates, humate or naphthalene
Any one or the mixture of at least two in sulfonic formaldehyde condensation compound.
As the optimal technical scheme of the preparation method of water-coal-slurry of the present invention, the preparation method of a kind of water-coal-slurry, institute
During a part of second slurry is returned, as slurry I ', the raw material adding shaping fine grinding to after being additionally included in step (2) by the method for stating
Step, wherein, the coal dust in slurry I ' accounts for 0～20wt% of the quality of pc in the first slurry.
In this optimal technical scheme, return the second slurry added admixed together with slurry II, water and additive, carry out
Shaping fine grinding.
Preferably, the water used in the present invention can be production clear water, it is also possible to is the recirculated water that produces of step (4),
Can also is that the mixed liquor of production clear water and recirculated water.But being not limited to the above-mentioned water enumerated, other kinds of water also can be used
In the present invention.
The recirculated water produced in step of the present invention (4), is possible not only to return to step (2), step (3) and step (6) and enters
Row recycling, it is also possible to as other industrial treatment water.
Second aspect, the present invention provides the water-coal-slurry that method as described in relation to the first aspect prepares.
Compared with the prior art, the method have the advantages that
1) present invention utilizes graded crushing, fractal grinding and multistage research of grade-suit theory to instruct brand-new pulping process and equipment to open
Sending out, it is achieved that water-coal-slurry optimal granularity grating, concentration is high, viscosity suitable and good stability etc. to make the water-coal-slurry prepared have
Feature.The Technology of the present invention compared with conventional process techniques, can improve available gas ratio, reduce project construction investment,
Production run cost and reduction are gasified and energy consumption, and the pulping energy consumption of water-coal-slurry of the present invention is 13～15kwh, relative to tradition
Technology reduces about 30%；And expand the scope of application of raw material to a greater degree, raw material can be extended to each coal, orchid
Charcoal and petroleum coke etc..
2) concentration of the water-coal-slurry of the present invention is 65～80%, relative to the water-coal-slurry of prior art, concentration improve 6～
8 percentage points；Viscosity is at 1000～1400mpa s (100S-1), it is simple to actual 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 respectively
Plant coal and have good universality, for the coal (such as petroleum coke and anthracite etc.) that paste-forming properties is good, even if requiring to reduce
Also coal-water fluid concentration can be improved to 65～80% in the case of particle diameter；For the coal of paste-forming properties difference (such as brown coal, jet coal and weak viscous
The low-order coal such as coal) for, although interior water content height paste-forming properties is poor, but uses the method for this present invention still can improve coal slurry and pile up
Efficiency and concentration, make concentration reach 65～80%.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
Embodiment 1
A kind of method being prepared water-coal-slurry as coal raw material by shenfu coal, shenfu coal is a kind of common coal in Inner Mongolia,
Analyzing water is 4.9%, and full water is 13%, and ash is 13.9%.
Described method comprises the steps:
(1) coal raw material is crushed obtain first slurry of granularity≤13mm；
(2) the first slurry being divided into slurry I and slurry II, the coal dust in slurry I accounts for the quality of pc in the first slurry
75wt%, the coal dust in slurry II accounts for the 25wt% of the quality of pc in the first slurry, is entered with water 7:3 in mass ratio by slurry I
Row shaping wet method corase grind obtains the second slurry that coal powder size is 2000 μm；
(3) a part of second slurry is returned as slurry I ' add in the raw material of shaping wet ball grinding (in slurry I '
Coal dust account for the 5wt% of the quality of pc in the first slurry), and mix with slurry II, water and additive, carry out shaping wet method thin
Mill obtains the 3rd slurry that coal powder size is 400 μm, and wherein, the mass ratio of slurry II, water and additive is 70:30:0.1；
(4) by second pulp concentration dehydration, solids content control 80% material as slurry A, the coal dust in slurry A
Account for the 70wt% of quality of pc in the first slurry；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 15wt% of quality of pc；Coal dust in slurry IV accounts for the 10wt% of the quality of pc in the first slurry；Coal dust in slurry V
Account for the 5wt% of quality of pc in the first slurry, slurry III is not processed, directly as slurry B；Slurry IV is surpassed
Being finely ground to the coal particle size in the slurry obtained is 25 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry being milled to and obtaining
Coal particle size be 5 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, carry out pinching 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；
The mass ratio of slurry A, slurry B, slurry C and the total amount of slurry D, water and additive is 70:30:0.1；
(7) mixed slurry is sheared with the strengthening of 100r/min shear rate, and outut device obtains water-coal-slurry.
After testing, obtaining water-coal-slurry product design is 79.5%, viscosity 1100mpa s (100S-1), have good stability, quiet
Only after 48 hours, syneresis rate is less than 5%.
Embodiment 2
A kind of method being prepared water-coal-slurry as coal raw material by Xinjiang Red Hill coal, Red Hill coal is that Xinjiang region one is common
Coal, full water is 24%, and ash is 14%.
Described method comprises the steps:
(1) coal raw material is crushed obtain first slurry of granularity≤13mm；
(2) the first slurry being divided into slurry I and slurry II, the coal dust in slurry I accounts for the quality of pc in the first slurry
80wt%, the coal dust in slurry II accounts for the 20wt% of the quality of pc in the first slurry, is entered with water 8:2 in mass ratio by slurry I
Row shaping wet method corase grind obtains the second slurry that coal powder size is 1000 μm；
(3) slurry II, water and additive are carried out shaping wet method fine grinding by the mass ratio mixing of 70:30:0.1 and obtain coal dust
Granularity is the 3rd slurry of 100 μm；
(4) second pulp concentration dehydrations, the material that solids content controls 80% accounts for as slurry A, the coal dust in slurry A
The 80wt% of the quality of pc in the first slurry；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 10wt% of quality of pc；Coal dust in slurry IV accounts for the 5wt% of the quality of pc in the first slurry；Coal dust in slurry V accounts for
The 5wt% of the quality of pc in the first slurry, does not processes slurry III, directly as slurry B；Slurry IV is carried out ultra-fine
Being milled to the coal particle size in the slurry obtained is 25 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry being milled to and obtaining
Coal particle size is 10 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, carry out pinching 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；
The mass ratio of slurry A, slurry B, slurry C and the total amount of slurry D, water and additive is 70:30:0.1；
(7) mixed slurry is sheared with the strengthening of 80r/min shear rate, and outut device obtains water-coal-slurry.
After testing, obtaining water-coal-slurry product design is 73.8%, viscosity 1050mpa s (100S-1), have good stability, quiet
Only after 48 hours, syneresis rate is less than 10%.Preparation process of the present invention use wet method shear the mode ground, the slurrying of water-coal-slurry
Energy consumption is 13～15kwh, and energy consumption can reduce by 30%, reduces slurrying cost.
Embodiment 3
A kind of method being prepared water-coal-slurry as coal raw material by brown coal, brown coal are a kind of common coal in Inner Mongolia, analyze
Water is 20.8%, and full water is 34.5%, and ash is 8.5%.
Described method comprises the steps:
(1) coal raw material is crushed obtain first slurry of granularity≤13mm；
(2) the first slurry being divided into slurry I and slurry II, the coal dust in slurry I accounts for the quality of pc in the first slurry
85wt%, the coal dust in slurry II accounts for the 15wt% of the quality of pc in the first slurry, is entered with water 7:3 in mass ratio by slurry I
Row shaping wet method corase grind obtains the second slurry that coal powder size is 600 μm；
(3) a part of second slurry is returned as slurry I ' add in the raw material of shaping wet ball grinding (in slurry I '
Coal dust account for the 20wt% of the quality of pc in the first slurry), and mix with slurry II, water and additive, carry out shaping wet method
Fine grinding obtains the 3rd slurry that coal powder size is 80 μm, and wherein, the mass ratio of slurry II, water and additive is 70:30:0.1；
(4) second pulp concentration dehydrations, the material that solids content controls 80% accounts for as slurry A, the coal dust in slurry A
The 65wt% of the quality of pc in the first slurry；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 15wt% of quality of pc；Coal dust in slurry IV accounts for the 10wt% of the quality of pc in the first slurry；Coal dust in slurry V
Account for the 10wt% of quality of pc in the first slurry, slurry III is not processed, directly as slurry B；Slurry IV is carried out
Coal particle size in the ultra-fine slurry being milled to obtain is 25 μm, as slurry C；Slurry V is carried out the ultra-fine slurry being milled to and obtaining
In coal particle size be 3 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, carry out pinching 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；
The mass ratio of slurry A, slurry B, slurry C and the total amount of slurry D, water and additive is 70:30:0.1；
(7) mixed slurry is sheared with the strengthening of 120r/min shear rate, and outut device obtains water-coal-slurry.
After testing, obtaining water-coal-slurry product design is 68.1%, viscosity 1005mpa s (100S-1), have good stability, quiet
Only after 48 hours, syneresis rate is less than 5%.
Embodiment 4
A kind of method being prepared water-coal-slurry as coal raw material by shenfu coal, shenfu coal is a kind of common coal in Inner Mongolia,
Analyzing water is 4.9%, and full water is 13%, and ash is 13.9%.
Described method comprises the steps:
(1) coal raw material is crushed obtain first slurry of granularity≤13mm；
(2) the first slurry being divided into slurry I and slurry II, the coal dust in slurry I accounts for the quality of pc in the first slurry
85wt%, the coal dust in slurry II accounts for the 15wt% of the quality of pc in the first slurry, by slurry I and water in mass ratio 7.5:
2.5 carry out shaping wet method corase grind obtains the second slurry that coal powder size is 2400 μm；
(3) a part of second slurry is returned as slurry I ' add in the raw material of shaping wet ball grinding (in slurry I '
Coal dust account for the 2wt% of the quality of pc in the first slurry), and mix with slurry II, water and additive, carry out shaping wet method thin
Mill obtains the 3rd slurry that coal powder size is 200 μm, and wherein, the mass ratio of slurry II, water and additive is 80:20:0.3；
(4) by second pulp concentration dehydration, solids content control 80% material as slurry A, the coal dust in slurry A
Account for the 83wt% of quality of pc in the first slurry；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 10wt% of quality of pc；Coal dust in slurry IV accounts for the 5wt% of the quality of pc in the first slurry；Coal dust in slurry V accounts for
The 2wt% of the quality of pc in the first slurry, does not processes slurry III, directly as slurry B；Slurry IV is carried out ultra-fine
Being milled to the coal particle size in the slurry obtained is 15 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry being milled to and obtaining
Coal particle size is 8 μm, as slurry D.
(6) will and mix with slurry A, slurry B, slurry C, slurry D, water and additive, carry out pinching mixed, obtain mixing and starch
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；
The mass ratio of slurry A, slurry B, slurry C and the total amount of slurry D, water and additive is 70:30:0.5；
(7) mixed slurry is sheared with the strengthening of 75r/min shear rate, and outut device obtains water-coal-slurry.
After testing, obtaining water-coal-slurry product design is 68.3%%, viscosity 1200mpa s (100S-1), have good stability,
After static 48 hours, syneresis rate is less than 5%.
Embodiment 5
A kind of method being prepared water-coal-slurry as coal raw material by brown coal, brown coal are a kind of common coal in Inner Mongolia, analyze
Water is 20.8%, and full water is 34.5%, and ash is 8.5%.
Described method comprises the steps:
(1) coal raw material is crushed obtain first slurry of granularity≤13mm；
(2) the first slurry being divided into slurry I and slurry II, the coal dust in slurry I accounts for the quality of pc in the first slurry
85wt%, the coal dust in slurry II accounts for the 15wt% of the coal dust gross mass in the first slurry, by slurry I and water 7:3 in mass ratio
Carry out shaping wet method corase grind and obtain the second slurry that coal powder size is 800 μm；
(3) a part of second slurry is returned as slurry I ' add in the raw material of shaping wet ball grinding (in slurry I '
Coal dust account for the 10wt% of the quality of pc in the first slurry), and mix with slurry II, water and additive, carry out shaping wet method
Fine grinding obtains the 3rd slurry that coal powder size is 50 μm, and wherein, the mass ratio of slurry II, water and additive is 75:25:0.1；
(4) second pulp concentration dehydrations, the material that solids content controls 80% accounts for as slurry A, the coal dust in slurry A
The 75wt% of the quality of pc in the first slurry；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted in the first slurry
The 19wt% of quality of pc；Coal dust in slurry IV accounts for the 5wt% of the quality of pc in the first slurry；Coal dust in slurry V accounts for
The 1wt% of the quality of pc in the first slurry, does not processes slurry III, directly as slurry B；Slurry IV is carried out ultra-fine
Being milled to the coal particle size in the slurry obtained is 10 μm, as slurry C；Slurry V is carried out in the ultra-fine slurry being milled to and obtaining
Coal particle size is 4 μm, as slurry D.
(6) slurry A, slurry B, slurry C, slurry D, water and additive are mixed, carry out pinching 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；
The mass ratio of slurry A, slurry B, slurry C and the total amount of slurry D, water and additive is 80:20:0.5；
(7) mixed slurry is sheared with the strengthening of 60r/min shear rate, and outut device obtains water-coal-slurry.
After testing, obtaining water-coal-slurry product design is 65.9%, viscosity 1010mpa s (100S-1), have good stability, quiet
Only after 48 hours, syneresis rate is less than 5%.
Applicant states, the present invention illustrates the method detailed of the present invention by above-described embodiment, but the present invention not office
It is limited to above-mentioned method detailed, does not i.e. mean that the present invention has to rely on above-mentioned method detailed and could implement.Art
Technical staff is it will be clearly understood that any improvement in the present invention, and the equivalence of raw material each to product of the present invention is replaced and auxiliary element
Interpolation, concrete way choice etc., within the scope of all falling within protection scope of the present invention and disclosure.
Claims (10)
1. the preparation method of a water-coal-slurry, it is characterised in that said method comprising the steps of:
The mixture of slurry A, slurry B, slurry C and slurry D is mixed with water and additive, pinches mixed, obtain mixed slurry, 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 the coal dust in slurry B is 30～500 μm；
Particle diameter 10～30 μm of the coal dust in slurry C；
Particle diameter≤10 μm of the coal dust in slurry D.
Method the most according to claim 1, it is characterised in that the grain of the coal dust in slurry A, slurry B, slurry C and slurry D
Footpath all differs；
Preferably, the quality of the coal dust in the coal dust in described slurry A, the coal dust in slurry B, the coal dust in slurry C and slurry D
Than being (60～84): (10～20): (5～10): (1～10)；
Preferably, the gross mass of slurry A, slurry B, slurry C and slurry D is (70～80) with the mass ratio of water and additive: (20
～30): (0.1～0.5)；
Preferably, the solid content of described slurry A is 80wt%.
Method the most according to claim 1 and 2, it is characterised in that described additive is selected from lignosulfonates, humic acids
Any one or the mixture of at least two in salt or naphthalene sulfonic acid-formaldehyde condensation product；
Preferably, the shear rate of described shear treatment is 60～120r/min.
4. according to the method described in any one of claim 1-3, it is characterised in that said method comprising the steps of:
(1) coal raw material is crushed, obtain 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, obtain the second slurry,
The granularity of the coal dust in described second slurry is 500～2400 μm；
(3) slurry II is mixed with water and additive carry out shaping fine grinding, obtain the 3rd slurry, the coal dust in described 3rd slurry
Particle diameter be 30～500 μm；
(4) the second slurry is dehydrated, obtains slurry A and recirculated water；
(5) coal dust that the 3rd slurry is divided in slurry III, slurry IV and slurry V, and slurry III is accounted for the coal dust in the first slurry
The 10～20wt% of quality；Coal dust in slurry IV accounts for 5～10wt% of the quality of pc in the first slurry；Coal in slurry V
Powder accounts for 1～10wt% of the quality of pc in the first slurry, does not processes slurry III, directly as slurry B；To slurry IV
Carry out Ultrafine Grinding with slurry V respectively and obtain slurry C and 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 is
(60～84): (10～20): (5～10): (1～10)；
(7) mixed slurry is sheared, obtain water-coal-slurry.
Method the most according to claim 4, it is characterised in that step (1) described broken time, the first slurry being crushed to obtain
Particle diameter≤the 13mm of the coal dust in material；
Preferably, step (2) described shaping corase grind is roughly ground for shaping wet method, in described shaping wet method rough grinding pass, and shaping wet method
The solid content of the material of corase grind is 40～60wt%；
Preferably, step (2) described slurry I with water according to (7～8): the mass ratio of (2～3) mixes；
Preferably, step (3) described shaping fine grinding is shaping wet method fine grinding, during described shaping wet method fine grinding, and shaping wet method
The solid content of the material of fine grinding is 40～60wt%；
Preferably, step (3) described slurry II, water and additive are according to (70～80): (20～30): the quality of (0.1～0.5)
Ratio mixes；
Preferably, the solid content of step (4) described slurry A is 80wt%；
Preferably, step (5) described Ultrafine Grinding is wet method fine grinding, during described wet method fine grinding, super wet method fine grinding
The solid content of material is 40～60wt%.
6. according to the method described in claim 4 or 5, it is characterised in that step (2) described shaping corase grind and step (3) are described
The device that shaping fine grinding uses all independently be horizontal rod mill, horizontal ball mill, Horizontal stirring mill, vertical ball mill or vertical
Any one or the combination of at least two in agitator mill；
Preferably, step (5) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
7. according to the method described in any one of claim 4-6, it is characterised in that step (3) and step (6) described additive are equal
Independently be any one or the mixing of at least two in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
Thing.
8. according to the method described in any one of claim 4-7, it is characterised in that after described method is additionally included in step (2)
A part of second slurry is returned the step in the raw material adding shaping fine grinding to, wherein, in described a part of second slurry
Coal dust accounts for 0～20wt% of the quality of pc in the first slurry.
9. according to the method described in any one of claim 4-8, it is characterised in that described step (2), step (3) and step (6)
The recirculated water that described water is production clear water and/or step (4) produces.
10. use the water-coal-slurry that the method described in any one of claim 1-9 prepares.
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| 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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| CN111530564A (en) * | 2020-06-03 | 2020-08-14 | 北煤化(北京)科技有限公司 | High-concentration high-fluidity ore pulp and preparation method 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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