CN106147897B - A kind of low-order coal water-coal-slurry and preparation method thereof - Google Patents
A kind of low-order coal water-coal-slurry and preparation method thereof Download PDFInfo
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- CN106147897B CN106147897B CN201610482834.XA CN201610482834A CN106147897B CN 106147897 B CN106147897 B CN 106147897B CN 201610482834 A CN201610482834 A CN 201610482834A CN 106147897 B CN106147897 B CN 106147897B
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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
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
Abstract
The invention provides a kind of low-order coal water-coal-slurry and preparation method thereof, the preparation method of the water-coal-slurry, including：Coal raw material is crushed, roughly grinds slurrying, is sieved, is sheared, shaping, fine grinding and Ultrafine Grinding, and the material after fine grinding and Ultrafine Grinding is re-started into corase grind, screening and shearing.The concentration for the water-coal-slurry that methods described obtains is 58 70wt%, particle diameter≤0.3mm of coal dust, and more than the 37% of total coal dust is accounted for less than 75 μ m coal powder, and is had good stability, and syneresis rate is less than 10% after standing 48 hours.The preparation method of the water-coal-slurry can improve the performance that low-order coal is converted into gasified coal water slurry, and methods described is applied to coal raw material of different nature, energy consumption is low, obtained water-coal-slurry deposition efficiency is high, can continuous production, satisfaction prepare gasified coal water slurry it is continuous, stably, the production requirement of low consumption.
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 low-order coal water-coal-slurry and preparation method thereof.
Background technology
Coal is the main energy sources in China, will not be changed within following considerable time.Country implements Filter Tuber For Clean Coal plan,
Using clean coal technology as coal utilization efficiency is improved, the important means to reduce environmental pollution is more next by various circles of society
More concerns, the clean coal technology developed including COAL-WATER SLURRY TECHNOLOGY are urgent task of the pendulum in face of compatriots.The kind of coal
Class is a lot, has the characteristics that different surface oxygen functional groups, porosity, surface hydrophobic and grindability.
Water-coal-slurry is the coal based fluid fuel and gasified raw material of a kind of environmental protection and energy saving.The species of the coal in China is mainly low order
Coal, the interior water height of low-order coal, grindability is poor, paste-forming properties are bad, can be by using coal blending, and optimizing improves grain size distribution, improves
With the slurry concentration for improving low-order coal.Therefore, this area needs to develop a kind of high concentration, low interior water, the gasified water of high stability
Coal slurry product.
CN 105038878A disclose a kind of method for preparing water-coal-slurry, and methods described is by substep by difficulty into slurry dry coal
Crush, afterwards branch point roughly ground, be dehydrated, fine grinding, the step such as Ultrafine Grinding, after being mixed using specific ratio, be filled with coal
Space during particle packing, improves deposition efficiency, and so as to improve the concentration of water-coal-slurry, the water-coal-slurry being prepared can meet
Gasification and burn application demand.
CN105154154A discloses a kind of preparation method of ultra-thin slurries, and methods described comprises the following steps：(1) will
Coal raw material is crushed to below 13mm, obtains the first slurry；(2) by the first slurry and water 5-85 in mass ratio：15-95 is mixed, and is obtained
To the second slurry；(3) the second slurry wet method shaping fine grinding is obtained into the 3rd slurry, the 3rd slurry particle diameter is less than 1mm, is less than
45 μm of materials account for more than the 80% of total material；(4) the 3rd slurry screen cloth is cleaned, is ultra-thin slurries after removing debris.
But the water coal slurry concentration that both the above method obtains need further to be lifted.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of low-order coal water-coal-slurry and its preparation side
Method, the preparation method of the water-coal-slurry are applied to coal raw material of different nature, and the low-order coal that is particularly suitable for use in raw material, energy consumption is low, obtains
The water-coal-slurry deposition efficiency that arrives is high, and the concentration of water-coal-slurry can reach 58-70wt%, can continuous production, satisfaction prepares gasified water
Coal slurry it is continuous, stably, the production requirement of low consumption.
" wt% " refers to weight/mass percentage composition unless otherwise specified in the present invention.
To use following technical scheme up to this purpose, the present invention：
An object of the present invention is to provide a kind of preparation method of water-coal-slurry, and methods described comprises the following steps：
(1) coal raw material is crushed and obtains coal dust, coal dust, additive and water are mixed, obtain the first slurry；
(2) the first slurry is subjected to corase grind slurrying, obtains the second slurry；
(3) the second slurry is sieved, sheared, obtained the 3rd slurry, the output of the slurry of part the 3rd, obtain the water coal
Starch product；
Remaining 3rd slurry and water mixing, shaping, it is 25-50 μm to obtain coal particle size size, concentration 15-35wt%
The 4th slurry；4th slurry carries out fine grinding and Ultrafine Grinding respectively, and it is 15-25 μm of the 5th slurry that fine grinding, which obtains coal particle size, surpasses
Fine grinding obtains the 6th slurry that coal particle size is 3-8 μm；The mixture return to step (2) of 5th slurry and the 6th slurry and/or
Step (3).
The mixture return to step (2) and/or step (3) of 5th slurry and the 6th slurry are specially：By the 5th slurry and
6th slurry whole return to step (2) mixes with the first slurry, is roughly ground, then is sieved, and shearing, part exports；Or,
5th slurry and the 6th slurry whole return to step (3) are mixed with the second slurry, sieved, is sheared, part
Output；Or,
The mixture return to step (2) of 5th slurry of a part and the 6th slurry is mixed with the first slurry, carried out thick
Mill, then sieved, shear, part exports；Remaining 5th slurry and the 6th slurry return to step (3) are mixed with the second slurry
Close, sieved, sheared, part exports.
The preparation method of water-coal-slurry provided by the invention will be roughly ground, and screening, shearing and shaping, fine grinding are mutually tied with Ultrafine Grinding
Close, significantly improve the stability of water-coal-slurry product, and the perfect hole being filled between coal dust so that the concentration of water-coal-slurry is reachable
To 70wt%, have good stability, after standing 48 hours, syneresis rate is less than 10%.
The preparation method of water-coal-slurry provided by the invention is applied to coal raw material of different nature, it is possible to increase low-order coal converts
For the performance of water-coal-slurry, energy consumption is low, can continuous production, meet prepare water-coal-slurry it is continuous, stably, the production requirement of low consumption.
Prepare water-coal-slurry using the method for the invention, due to do not include in the 3rd slurry that exports first the 5th slurry and
The material of 6th size circulations, therefore, the 3rd slurry exported first can not collected first, collect, obtain after circulation primary
The water-coal-slurry product needed.
The mass ratio of step (1) coal dust, water and additive is (70-80):(20-30):(0.1-0.5), such as 72:
22:0.2、73:23:0.3、75:25:0.4、77:28:0.2 or 79:29:0.3 etc..
Preferably, step (1) the coal raw material is low-order coal.The preparation method of water-coal-slurry provided by the invention is especially suitable
In preparation low-order coal water-coal-slurry.
Preferably, the low-order coal in lignite, jet coal, dross coal or weakly caking coal any one or at least two
Combination.Typical but non-limiting combination such as, lignite and jet coal, dross coal and weakly caking coal, lignite and dross coal, lignite with
Weakly caking coal, lignite, jet coal and dross coal, jet coal, dross coal and weakly caking coal.
Preferably, the particle diameter of step (1) described coal dust is less than 13mm, as 12mm, 11mm, 10mm, 8mm, 6mm, 7mm,
5mm, 4mm, 3mm, 2mm, 0.5mm or 0.1mm etc..
Preferably, step (1) described additive is in lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
Any one or at least two combination.Typical but non-limiting combination such as lignosulfonates and humate, it is wooden
Plain sulfonate and naphthalene sulfonic acid-formaldehyde condensation product, lignosulfonates, humate and naphthalene sulfonic acid-formaldehyde condensation product.
The device of step (2) described corase grind is horizontal rod mill, horizontal ball mill, vertical ball mill or vertical stirring mill
In any one or at least two combination.Typical but non-limiting combination such as horizontal rod mill and horizontal ball mill, crouch
Formula ball mill and vertical ball mill.
Preferably, the time of step (2) described corase grind is 10-30min, as 12min, 15min, 18min, 20min,
22min, 25min or 28min etc., the time of the corase grind can adjust the ore grinding time according to coal characteristic.
Preferably, step (2) the slurrying main purpose is to prepare coarse granule in water-coal-slurry granularity, in second slurry
Coal slurry granularity average grain diameter be 80-150 μm, such as 85 μm, 90 μm, 95 μm, 100 μm, 102 μm, 105 μm, 110 μm, 115 μm, 120
μm, 130 μm or 140 μm etc..
Preferably, the concentration of step (2) second slurry is 55-80wt%, as 58wt%, 60wt%, 62wt%,
65wt%, 68wt%, 70wt%, 75wt% or 78wt% etc..
Step (3) screening was 8-15 mesh sieves, such as crossed 9 mesh, 10 mesh, 11 mesh, 12 mesh, 13 mesh or 14 sieves.
Preferably, the speed of step (3) described shearing is 80-100r/s, as 82r/s, 85r/s, 88r/s, 92r/s,
95r/s, 98r/s or 99r/s etc..
Preferably, step (3) screening, shear in screening shearing integrated device or respectively on screening machine and boxshear apparatus
Carry out.
Preferably, the amount ratio of step (3) remaining 3rd slurry and water is (70-80):(20-30), such as 72:
28、7:27、7:25 or 78:22.
Preferably, step (3) described shaping uses trimmer.
Coal particle size size is 25-50 μm in step (3) the 4th slurry, such as 26 μm, 28 μm, 30 μm, 35 μm, 38 μ
M, 40 μm, 42 μm or 48 μm etc..The concentration of 4th slurry is 15-35wt%, as 18wt%, 20wt%, 22wt%, 23wt%,
25wt%, 28wt%, 30wt% or 32wt% etc..
The particle diameter of coal dust is 15-25 μm in the 5th slurry in step (3), such as 18 μm, 20 μm, 22 μm, 23 μm or 24 μm,
The particle diameter of coal dust is 3-8 μm in 6th slurry, such as 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm or 7.5 μm
Deng.
The mass ratio that the 4th slurry of fine grinding and Ultrafine Grinding is carried out in step (3) is (1-5):1, such as 1.5:1、2:1、2.5:
1、3:1、3.5:1、4:1 or 4.5:1 etc..
Preferably, step (3) described fine grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, step (3) described Ultrafine Grinding uses vertical mixing mill and/or Horizontal stirring mill.
Preferably, the mixture of the 5th slurry and the 6th slurry described in step (3) is (0-4) according to mass ratio：(6-
10) difference return to step (2) and step (3), such as 1:7、2:7、3:8、3:9 or 2:8 etc..
The water used in methods described is caused waste water in production clear water and/or Chemical Manufacture.
As preferable technical scheme, the preparation method of the water-coal-slurry comprises the following steps：
(1) coal raw material is crushed to particle diameter and is less than 13mm, obtain coal dust, be according to mass ratio by coal dust, additive and water
(70-80):(20-30):(0.1-0.5) is mixed, and obtains the first slurry；
(2) the first slurry is subjected to corase grind slurrying, it is 80-150 μm to obtain coal dust average grain diameter, concentration 55-80wt%
The second slurry；
(3) the second slurry is crossed into 8-15 mesh sieves, in 80-100r/s speed down cut, obtains the 3rd slurry, by part
Three slurries export, and obtain the water-coal-slurry product；
According to mass ratio it is (70-80) by remaining 3rd slurry and water:(20-30) is mixed, and shaping, obtains coal particle size
Size is 25-50 μm, and concentration is 15-35wt% the 4th slurry；According to mass ratio it is (1-5) by the 4th slurry:1 is carried out respectively
Fine grinding and Ultrafine Grinding, it is 15-25 μm of the 5th slurry that fine grinding, which obtains coal particle size, and Ultrafine Grinding obtains that coal particle size is 3-8 μm
Six slurries；By the mixture return to step (2) and/or step (3) of the 5th slurry and the 6th slurry.
An object of the present invention, which also resides in, provides a kind of water-coal-slurry, and the concentration of the water-coal-slurry is 58-70wt%, coal dust
Particle diameter≤0.3mm, account for more than the 37% of total coal dust less than 75 μ m coal powder, such as 38%, 39%, 40%, 42%, 45%,
50%th, 60%, 70% or 80% etc., different according to ature of coal, coal particle size is different.The deposition efficiency of the water-coal-slurry is made than tradition
Sizing process improves 6-12%.
Water-coal-slurry deposition efficiency provided by the invention is high, and its concentration can reach 70wt%, and the particle diameter distribution of coal dust is than tradition
Pulping process improves deposition efficiency 6-12%, the hole being perfectly filled between pulverized coal particle.
Compared with prior art, beneficial effects of the present invention are：
1st, the preparation method of water-coal-slurry provided by the invention using low-order coal as raw material using crushing technology with screening, shearing,
The method that shaping, fine grinding and Ultrafine Grinding technology are combined effectively fills accumulation space, and accumulation effect is improved than traditional pulping process
Rate 6-12%, gasified coal water slurry concentration 5-8% is improved, and obtained water coal has good stability, syneresis rate after standing 48 hours
Less than 10%.
2nd, the preparation method of water-coal-slurry provided by the invention by the broken of original and existing pulping process, grinding, screening and
Shearing is merged, i.e., fine grinding, Ultrafine Grinding after the screened shearing shaping of low-order coal, effectively reduces slurrying energy expenditure.
3rd, the preparation method of water-coal-slurry provided by the invention, can be actual according to ature of coal in corase grind, fine grinding and Ultrafine Grinding link
Situation selects efficient grinder, to improve slurrying concentration, reduces energy consumption.
4th, the preparation method of water-coal-slurry provided by the invention is continous way production technology, and satisfaction prepares the company of gasified coal water slurry
Continuous, stable and low consumption production requirement.
Brief description of the drawings
Fig. 1 is the preparation technology flow chart for the water-coal-slurry that one embodiment of the present invention provides.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
As shown in figure 1, the preparation method of the water-coal-slurry provided for one embodiment of the present invention, methods described includes as follows
Step：
(1) coal raw material is crushed and obtains coal dust, coal dust, additive and water are mixed, obtain the first slurry；
(2) the first slurry is subjected to corase grind slurrying, obtains the second slurry；
(3) the second slurry is sieved, sheared, obtained the 3rd slurry, the output of the slurry of part the 3rd, obtain the water coal
Slurry；
Remaining 3rd slurry and water mixing, shaping, it is 25-50 μm to obtain coal particle size size, concentration 15-35wt%
The 4th slurry；4th slurry is subjected to fine grinding and Ultrafine Grinding respectively, it is 15-25 μm of the 5th slurry that fine grinding, which obtains coal particle size,
Ultrafine Grinding obtains the 6th slurry that coal particle size is 3-8 μm；By the mixture return to step (2) of the 5th slurry and the 6th slurry
And/or step (3).
Embodiment 1
A kind of method that water-coal-slurry is prepared by jet coal, jet coal are a kind of common low-order coal in Yulin area, are analyzed
Water is 4.9%, and full water is 13%, ash content 13.9%.
Methods described comprises the following steps：
(1) coal raw material is crushed to coal dust of the particle diameter less than 13mm, by coal dust, industrial water and additive according to 75:25:
The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 68.6wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 8 eye mesh screens, afterwards in 100r/s shearing force down cuts, obtains the 3rd
Slurry, 61.1wt% the 3rd slurry is exported, obtains the water-coal-slurry；
By remaining 38.9wt% the 3rd slurry add water carry out shaping obtain the 4th slurry, wherein, the 4th slurry it is dense
Spend for 27wt%, the 4th slurry particle diameter is 35 μm after shaping；By the 4th slurry according to mass ratio be 1.7:1 respectively carry out fine grinding and
Ultrafine Grinding, the 4th slurry fine grinding obtain the 5th slurry, and the 4th slurry Ultrafine Grinding obtains the 6th slurry, wherein, the 5th slurry particle diameter
For 19.3 μm of material；6th slurry particle diameter is 5.6 μm of material；By the mixture of the 5th slurry and the 6th slurry using following
Mode is handled：
By the mixture of the 5th slurry and the 6th slurry according to mass ratio be 4:6 difference return to step (2) and step (3).
After circulation primary, the concentration of obtained water-coal-slurry is 68.6wt%, and average grain diameter is 100 μm, less than 75 μm materials
More than the 43% of total material is accounted for, viscosity 1060mPaS, is had good stability, syneresis rate is less than 10% after static 48 hours.
Embodiment 2
A kind of method that water-coal-slurry is prepared by lignite, lignite is a kind of common low-order coal in Inner Mongol Hailar Area, analysis
Water is 14.9%, and full water is 31%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) brown coal crushing to particle diameter is less than to 13mm coal dust, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 58wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 15 eye mesh screens, afterwards in 80r/s shearing force down cuts, obtains the 3rd
Slurry, 61.3wt% the 3rd slurry is exported, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 3rd slurry and obtain 31wt% the 4th slurry, the 4th slurry particle diameter is after shaping
42μm；By the 4th slurry according to mass ratio be 2.5:1 carries out fine grinding and Ultrafine Grinding respectively, and the 4th slurry fine grinding obtains the 5th slurry
Material, the 4th slurry Ultrafine Grinding obtain the 6th slurry, wherein, the 5th slurry particle diameter is 16.8 μm of material；6th slurry particle diameter is
7.5 μm of material；
By the whole directly return to step (3) of the mixture of the 5th slurry and the 6th slurry.
After circulation primary, the concentration of the obtained water-coal-slurry is 58wt%, viscosity 1158mPaS, particle diameter≤
0.3mm, less than 75 μm materials account for more than the 40% of total material, had good stability, and syneresis rate is less than 10% after static 48 hours.
Embodiment 3
A kind of method that water-coal-slurry is prepared by Xinjiang Red Hill coal, Xinjiang Red Hill coal are that the quasi- Ge Er areas in Xinjiang are a kind of common low
Rank coal, analysis water are 11.2%, and full water is 24%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) by Xinjiang Zhungeer coal be crushed to particle diameter be less than 13mm coal dust, by coal dust, industrial water and additive according to
80:20:The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 60wt% the second slurry；
(3) the second slurry is cleaned through 9 eye mesh screens, afterwards in 90r/s shearing force down cuts, obtains the 3rd slurry, will
62wt% the 3rd slurry output, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 3rd slurry and obtain 25wt% the 4th slurry, the 4th slurry particle diameter is after shaping
39.1μm；By the 4th slurry according to mass ratio be 2:1 carries out fine grinding and Ultrafine Grinding respectively, and the 4th slurry fine grinding obtains the 5th slurry
Material, the 4th slurry Ultrafine Grinding obtain the 6th slurry, wherein, the 5th slurry particle diameter is 16.9 μm of material；6th slurry particle diameter is
7.5 μm material；By the mixture of the 5th slurry and the 6th slurry according to mass ratio be 2:8 difference return to step (2) and step
(3)。
After circulation primary, the concentration of obtained water-coal-slurry is 60.8wt%, viscosity 1200mPaS, particle diameter≤0.3mm,
Less than 75 μm materials account for more than the 37% of total material, have good stability, and syneresis rate is less than 10% after static 48 hours.
Embodiment 4
A kind of method that water-coal-slurry is prepared by lignite, lignite are a kind of common low-order coal in Hulun Buir Sandy Land area, point
Bleed is 14.9%, and full water is 31%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) brown coal crushing to particle diameter is less than to 13mm coal dust, by coal dust, industrial water and additive according to 70:30:
The first slurry is obtained after the mixing of 0.1 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 80wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 15 eye mesh screens, afterwards in 80r/s shearing force down cuts, obtains the 3rd
Slurry, the slurries of 58wt% the 3rd output, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 3rd slurry and obtain 35wt% the 4th slurry, the 4th slurry particle diameter is after shaping
25μm；By the 4th slurry according to mass ratio be 5:1 carries out fine grinding and Ultrafine Grinding, the 4th slurry fine grinding respectively obtains the 5th slurry,
4th slurry Ultrafine Grinding obtains the 6th slurry, wherein, the 5th slurry particle diameter is 15 μm of material；6th slurry particle diameter is 3 μm
Material；
By the whole directly return to step (2) of the 5th slurry and the 6th slurry.
After circulation primary, the concentration of the obtained water-coal-slurry is 62wt%, viscosity 1158mPaS, particle diameter≤
0.3mm, less than 75 μm materials account for more than the 40% of total material, had good stability, and syneresis rate is less than 10% after static 48 hours.
Embodiment 5
A kind of method by prepared with Shenfu coal for water-coal-slurry, shenfu coal are a kind of common low-order coal in Shaanxi god's mansion area, analysis
Water is 4.8%, and full water is 12%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) shenfu coal is crushed to coal dust of the particle diameter less than 13mm, by coal dust, industrial water and additive according to 80:20:
The first slurry is obtained after the mixing of 0.5 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 55wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 8 eye mesh screens, afterwards in 100r/s shearing force down cuts, obtains the 3rd
Slurry, 78wt% the 3rd slurry is exported, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 3rd slurry and obtain 15wt% the 4th slurry, the 4th slurry particle diameter is after shaping
50μm；By the 4th slurry according to mass ratio be 1:1 carries out fine grinding and Ultrafine Grinding, the 4th slurry fine grinding respectively obtains the 5th slurry,
4th slurry Ultrafine Grinding obtains the 6th slurry, wherein, the 5th slurry particle diameter is 25 μm of material；6th slurry particle diameter is 8 μm
Material；By the whole directly return to step (2) of the 5th slurry and the 6th slurry.
After circulation primary, the concentration of the obtained water-coal-slurry is 70wt%, viscosity 1158mPaS, particle diameter≤
0.3mm, less than 75 μm materials account for more than the 40% of total material, had good stability, and syneresis rate is less than 10% after static 48 hours.
Comparative example 1
A kind of method that water-coal-slurry is prepared by jet coal, jet coal are a kind of common low-order coal in Yulin area, are analyzed
Water is 4.9%, and full water is 13%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) brown coal crushing to particle diameter is less than to 13mm coal dust, by coal dust, industrial water and additive according to 75:25:
The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 68.6wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 8 eye mesh screens, afterwards in 100r/s shearing force down cuts, obtains the 3rd
Slurry, 61.7wt% the 3rd slurry is exported, obtains the water-coal-slurry；
Water is added to be mixed to get 27wt% the 4th slurry in remaining 38.9wt% the 3rd slurry；By the 4th slurry according to
Mass ratio is 1.7:1 carries out fine grinding and Ultrafine Grinding, the 4th slurry fine grinding respectively obtains the 5th slurry, and the 4th slurry Ultrafine Grinding obtains
6th slurry, wherein, the 5th slurry particle diameter is 25 μm of material；6th slurry particle diameter is 8 μm of material；By the 5th slurry and
The whole directly return to step (2) of the mixture of six slurries.
After one cycle, the concentration of the obtained water-coal-slurry is 55wt%, viscosity 1000mPaS, particle diameter≤
0.3mm, less than 75 μm materials account for more than the 35% of total material, but syneresis rate is more than 10% after static 24 hours, and fine grinding
With the increase of Ultrafine Grinding link energy consumption.
Comparative example 2
A kind of method that water-coal-slurry is prepared by lignite, lignite is a kind of common low-order coal in Inner Mongol Hailar Area, analysis
Water is 14.9%, and full water is 31%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) brown coal crushing to particle diameter is less than to 13mm coal dust, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 58wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 8 eye mesh screens, afterwards in 100r/s shearing force down cuts, obtains the 3rd
Slurry, 61.3wt% the 3rd slurry is exported, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 38.7wt% the 3rd slurry and obtain 31wt% the 4th slurry, the 4th after shaping
Slurry particle diameter is 50 μm；4th slurry is subjected to fine grinding, obtains the 5th slurry, the 5th slurry particle diameter is 25 μm of material；Will be thin
The 5th direct return to step of slurry (2) after mill.
After one cycle, the concentration of the water-coal-slurry is 53wt%, viscosity 1010mPaS, particle diameter≤0.3mm, is less than
75 μm of materials account for more than the 28% of total material, and syneresis rate is more than 10% after static 24 hours, and the increase of fine grinding link energy consumption.
Comparative example 3
A kind of method that water-coal-slurry is prepared by lignite, lignite is a kind of common low-order coal in Inner Mongol Hailar Area, analysis
Water is 14.9%, and full water is 31%, and ash content 12.9%, particle diameter is less than 50mm.
It the described method comprises the following steps：
(1) brown coal crushing to particle diameter is less than to 13mm coal dust, by coal dust, industrial water and additive according to 85:15:
The first slurry is obtained after the mixing of 0.3 mass ratio；
(2) the first slurry is inputted into kibbling mill and carries out pulping process, obtain 58wt% the second slurry；
(3) the second slurry in step (2) is cleaned through 8 eye mesh screens, afterwards in 100r/s shearing force down cuts, obtains the 3rd
Slurry, 61.3wt% the 3rd slurry is exported, obtains the water-coal-slurry；
Add water to carry out shaping in remaining 38.7wt% the 3rd slurry and obtain 31wt% the 4th slurry, the 4th after shaping
Slurry particle diameter is 50 μm；4th slurry is subjected to Ultrafine Grinding, obtains the 6th slurry, the 6th slurry particle diameter is 8 μm of material；Will be super
The whole directly return to step (2) of the 6th slurry after fine grinding.
After one cycle, the concentration of the obtained water-coal-slurry is 50wt%, viscosity 1100mPaS, particle diameter≤
0.3mm, less than 75 μm materials account for more than the 45% of total material, and syneresis rate is more than 10% after static 24 hours, and in Ultrafine Grinding
The increase of link energy consumption.
Applicant states, the foregoing is only the embodiment of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can readily occur in, all fall within protection scope of the present invention and it is open within the scope of.
Claims (21)
1. a kind of preparation method of water-coal-slurry, it is characterised in that methods described comprises the following steps：
(1) coal raw material is crushed and obtains coal dust, coal dust, additive and water are mixed, obtain the first slurry；
(2) the first slurry is subjected to corase grind slurrying, obtains the second slurry；
(3) the second slurry is sieved, sheared, obtained the 3rd slurry, the output of the slurry of part the 3rd, obtain the water-coal-slurry production
Product；
The mixing of remaining 3rd slurry and water, shaping, coal particle size size is obtained as 25-50 μm, concentration is the of 15-35wt%
Four slurries；4th slurry carries out fine grinding and Ultrafine Grinding respectively, and fine grinding obtains the 5th slurry that coal particle size is 15-25 μm, ultra-fine
Mill obtains the 6th slurry that coal particle size is 3-8 μm；The mixture return to step (2) and/or step of 5th slurry and the 6th slurry
Suddenly (3).
2. according to the method for claim 1, it is characterised in that the mass ratio of step (1) coal dust, water and additive is
(70-80):(20-30):(0.1-0.5)。
3. according to the method for claim 1, it is characterised in that step (1) the coal raw material is low-order coal.
4. according to the method for claim 3, the low-order coal appointing in lignite, jet coal, dross coal or weakly caking coal
Anticipate a kind of or at least two combinations.
5. according to the method for claim 1, it is characterised in that the particle diameter of step (1) described coal dust is less than 13mm.
6. according to the method for claim 1, it is characterised in that step (1) described additive is selected from lignosulfonates, corruption
In phytate or naphthalene sulfonic acid-formaldehyde condensation product any one or at least two combination.
7. according to the method for claim 1, it is characterised in that the device of step (2) described corase grind is horizontal rod mill, crouched
In formula ball mill, vertical ball mill or vertical stirring mill any one or at least two combination.
8. according to the method for claim 1, it is characterised in that the time of step (2) described corase grind is 10-30min.
9. according to the method for claim 1, it is characterised in that the average grain diameter of coal dust in step (2) second slurry
For 80-150 μm.
10. according to the method for claim 1, it is characterised in that the concentration of step (2) second slurry is 55-
80wt%.
11. according to the method for claim 1, it is characterised in that step (3) screening was 8-15 mesh sieves.
12. according to the method for claim 1, it is characterised in that the speed of step (3) described shearing is 80-100r/s.
13. according to the method for claim 1, it is characterised in that step (3) described screening, shear in screening shearing one
Device is carried out on screening machine and boxshear apparatus respectively.
14. utilize the method described in claim 1, it is characterised in that the quality of step (3) remaining 3rd slurry and water
Than for (70-80):(20-30).
15. according to the method for claim 1, it is characterised in that step (4) described shaping uses trimmer.
16. according to the method for claim 1, it is characterised in that the 4th slurry of fine grinding and Ultrafine Grinding is carried out in step (3)
Mass ratio be (1-5):1.
17. according to the method for claim 1, it is characterised in that step (3) described fine grinding using vertical mixing mill and/or
Horizontal stirring mill.
18. according to the method for claim 1, it is characterised in that step (3) described Ultrafine Grinding using vertical mixing mill and/
Or Horizontal stirring mill.
19. according to the method for claim 1, it is characterised in that the 5th slurry described in step (3) and the 6th slurry it is mixed
Compound is (0-4) according to mass ratio:(6-10) difference return to step (2) and step (3).
20. according to the method for claim 1, it is characterised in that the water used in methods described be production clear water and/or
Caused waste water in Chemical Manufacture.
21. according to the method described in one of claim 1-20, it is characterised in that methods described comprises the following steps：
(1) coal raw material is crushed to particle diameter and is less than 13mm, obtain coal dust, according to mass ratio be (70- by coal dust, additive and water
80):(20-30):(0.1-0.5) is mixed, and obtains the first slurry；
(2) the first slurry is subjected to corase grind slurrying, obtains coal dust average grain diameter as 80-150 μm, concentration is the of 55-80wt%
Two slurries；
(3) the second slurry is crossed into 8-15 mesh sieves, in 80-100r/s speed down cut, obtains the 3rd slurry, part the 3rd is starched
Material output, obtains the water-coal-slurry product；
According to mass ratio it is (70-80) by remaining 3rd slurry and water:(20-30) is mixed, and shaping, obtains coal particle size size
For 25-50 μm, concentration is 15-35wt% the 4th slurry；According to mass ratio it is (1-5) by the 4th slurry:1 carries out fine grinding respectively
And Ultrafine Grinding, it is 15-25 μm of the 5th slurry that fine grinding, which obtains coal particle size, and Ultrafine Grinding obtains the 6th slurry that coal particle size is 3-8 μm
Material；By the mixture return to step (2) and/or step (3) of the 5th slurry and the 6th slurry.
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| CN108219877A (en) * | 2016-12-15 | 2018-06-29 | 煤科院节能技术有限公司 | A kind of method for preparing high-concentration coal-water slurry |
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| CN109082313A (en) * | 2018-08-06 | 2018-12-25 | 国网辽宁省电力有限公司电力科学研究院 | It is a kind of improve low-order coal water-coal-slurry slurry concentration propose effect agent and its application method |
| CN109499729A (en) * | 2019-01-04 | 2019-03-22 | 亚太环保股份有限公司 | A kind of breaking method of waste cathode of aluminum electrolytic cell |
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