CN109233920A - A kind of semi-coke slurry preparation method based on grain size distribution - Google Patents
A kind of semi-coke slurry preparation method based on grain size distribution Download PDFInfo
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Abstract
The semi-coke that the invention discloses a kind of based on grain size distribution starches preparation method, comprising the following steps: and one, successively raw material semi-coke be crushed and is ground, obtain two kinds of semi-coke powder A and semi-coke powder material B with different average particle sizes；Two, grain size distribution optimization is carried out to semi-coke powder A and semi-coke powder material B, the mass ratio of semi-coke powder A and semi-coke powder material B in the powder after obtaining grain size distribution optimization；Three, semi-coke powder A and the mass ratio of semi-coke powder material B carry out ingredient in the powder after being optimized according to grain size distribution, and then plus water and dispersant are uniformly mixing to obtain semi-coke slurry.Influence of the present invention using grain size distribution to semi-coke slurry performance, calculated using laser particle size analyzer and passes through Gao Dengshuziman particle-size distribution model matched curve, obtain grain size distribution prioritization scheme, then the semi-coke slurry that viscosity is low and syneresis rate is extremely low is prepared, this method is simple, energy conservation and environmental protection, and the semi-coke slurry of preparation has fabulous mobility and stability.
Description
Technical field
The invention belongs to semi-cokes to starch preparation technical field, and in particular to a kind of semi-coke slurry preparation side based on grain size distribution
Method.
Background technique
Semi-coke (semi-coke is also referred to as semicoke) is a kind of solid-state that coal is obtained by 500 DEG C~700 DEG C of temperature destructive distillation
Product.The output of North Shaanxi semi-coke ranks the first in the whole nation at present, but due to the transition of coal in China industry in recent years
With the increasing of environmentally friendly dynamics, lead to North Shaanxi semi-coke overproduction, and semi-coke is because its intensity and crush resistance are poor, production,
A large amount of semi-coke powder are generated during transport, storage, semi-coke powder can only be thrown aside heap because its undersized is unable to satisfy technique requirement
It is stored in river or the edge of a field, or is sold as low price fuel, not only makes the wasting of resources, economic benefit decline, reveals simultaneously
Its accumulation more easily causes serious dust pollution, therefore how preferably to become urgently to be resolved ask using the semi-coke of northern Shensi
Topic.
Semi-coke is used to prepare the technology of semi-coke slurry as the one of a branch of COAL-WATER SLURRY TECHNOLOGY and clean coal technology
A important component.The related patents report to semi-coke slurry domestic at present is mostly to starch preparation side by the water coke of raw material of petroleum coke
Method, the cost of material is higher and is not easy to obtain, and processing cost is higher, to semi-coke as raw material preparation semi-coke slurry report compared with
Few, technique existing defects hinder the development and application of semi-coke slurry.
Application No. is 201310059669.3 Chinese invention patents to disclose a kind of preparation method of water coke slurry, the patent
Use the thermal decomposition product semi-coke of coal for main component prepare water coke slurry, but the patent focus on using self-control semi-coke system
Slurry does not embody the efficient utilization that superfluous semi-coke powder is produced to industry at this stage, while pulping process additive is more, technique
It is cumbersome.
One kind, which is disclosed, application No. is 200810012425.9 Chinese invention patent prepares water using lignite semi-coke as raw material
The method of coke slurry, obtained water coke slurry concentration is only 60%, is required though having reached gasification, on slurry concentration with it is low-quality
The concentration that bituminous coal does water-coal-slurry, which compares, does not embody advantage.
Application No. is 201710472257.0 Chinese invention patents to disclose a kind of preparation method of water coke slurry, with water pair
The semi-coke generated in coal gasification reaction or pyrolytic process carries out Quench, occurs that semi-coke from rupturing, thus agitated in conjunction with water
Water coke slurry is made；Though the patent by semi-coke is directly carried out Quench processing after carry out slurrying so that be slurried speed have compared with
It is big to be promoted, but cannot be guaranteed the performance of made water coke slurry.
In conclusion although individual patents disclose the preparation process and method of semi-coke slurry, it is efficiently sharp to existing semi-coke
With the preparation process of preparation high concentration water's coke slurry, there are still certain defects, need a kind of process simple, energy-saving and environment-friendly, especially
A kind of coal is needed to crack produced semi-coke, such as the technique of northwest semi-coke preparation high concentration semi-coke slurry.
Summary of the invention
It is a kind of based on granularity technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, providing
The semi-coke of gradation starches preparation method.Influence in the preparation method using grain size distribution to semi-coke slurry performance, using laser particle size
Gao Dengshuziman particle-size distribution model matched curve is calculated and passed through to analyzer, obtains grain size distribution prioritization scheme, then prepares
Viscosity is low out and syneresis rate is extremely low semi-coke slurry, this method is simple, energy conservation and environmental protection, and the semi-coke slurry of preparation has fabulous mobility
And stability.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of semi-coke slurry system based on grain size distribution
Preparation Method, which is characterized in that method includes the following steps:
Step 1: successively raw material semi-coke is crushed and is ground, two kinds of semi-coke powder with different average particle sizes are obtained
Material, is respectively labeled as semi-coke powder A and semi-coke powder material B；The average particle size of the semi-coke powder A is 0.12mm~0.38mm, institute
The average particle size for stating semi-coke powder material B is 0.04mm~0.075mm；
Step 2: carrying out grain size distribution optimization, detailed process to semi-coke powder A obtained in step 1 and semi-coke powder material B
Are as follows:
Step 201 carries out grain size distribution according to the different mass ratio of m kind with semi-coke powder material B to semi-coke powder A respectively, obtains
Powder to after m kind grain size distribution, by the semi-coke powder in the powder after every kind of grain size distribution in the powder after m kind grain size distribution
The mass content of A is denoted as Y；The m is the positive integer greater than 3；
Step 202, using laser fineness gage respectively to the powder after m kind grain size distribution obtained in step 201 into
Row is calculated, the size distribution in powder after respectively obtaining every kind of grain size distribution, wherein grain in the powder after every kind of grain size distribution
The mass content of semi-coke powder of the degree less than 0.075mm is Q1, granularity be more than or equal to 0.075mm and be less than 0.125mm semi-coke
The mass content of powder is Q2, granularity be more than or equal to 0.125mm and less than 0.180mm semi-coke powder mass content be Q3, grain
It is Q that degree, which is more than or equal to 0.180mm and the mass content of the semi-coke powder less than or equal to 0.45mm,4；
The size distribution in powder after step 203, every kind of grain size distribution according to obtained in step 202 calculates every kind
The average model parameters N of powder after grain size distribution, detailed process is as follows: first with Gao Dengshuziman particle-size distribution model formula
T=dn/dmax nThe model parameter n of semi-coke powder of the granularity less than d in powder after calculating every kind of grain size distribution, wherein d is certain
A granularity, mass content of the T for semi-coke powder of the granularity less than d in the powder after every kind of grain size distribution, dmaxFor every kind of particle size fraction
Maximum semi-coke particles granularity in powder after matching, granularity is less than 0.075mm's in powder after calculating every kind of grain size distribution
The model parameter n of semi-coke powder1When, d 0.075mm, T1=Q1, granularity is less than in powder after calculating every kind of grain size distribution
The model parameter n of the semi-coke powder of 0.125mm2When, d 0.125mm, T2=Q1+Q2, powder after calculating every kind of grain size distribution
The model parameter n of powder of the granularity less than 0.180mm in body3When, d 0.180mm, T3=Q1+Q2+Q3, then take n1、n2And n3
Average model parameters N of the average value as the powder after every kind of grain size distribution；
Step 204, the average model parameters that the powder after the grain size distribution of m kind is calculated using the method in step 203, respectively
The average model parameters N of powder after obtaining m grain size distribution, then with every kind of particle size fraction in the powder after m kind grain size distribution
The mass content Y of semi-coke powder A in powder after matching is abscissa, the average model parameters of the powder after every kind of grain size distribution
N is that ordinate carries out linear fit, obtains linearly related function Y=-bN+a, wherein a and b are all larger than zero；
Step 205, the averaging model that the powder after grain size distribution is determined according to the packing efficiency of the powder after grain size distribution
The optimization value range of parameter N is 0.3~0.45, chooses average model parameters N and substitutes into the linearly related function in step 204
In Y=-bN+a, the mass content of semi-coke powder A in the powder after calculating grain size distribution optimization, so that it is excellent to obtain grain size distribution
The mass ratio of semi-coke powder A and semi-coke powder material B in powder after change；
Step 3: the grain size distribution according to obtained in step 205 optimization after powder in semi-coke powder A and semi-coke powder material B
Mass ratio carry out ingredient, then plus water and dispersant are uniformly mixing to obtain semi-coke slurry.
The present invention proposes to allow the average mould of powder after m kind grade gradation by Gao Dengshuziman particle-size distribution model formula
The mass content Y of semi-coke powder A carries out linear fit and obtains linearly related letter in powder after shape parameter N and m kind grain size distribution
Number Y=-bN+a, wherein a and b are all larger than zero；Again using packing efficiency as index, the averaging model ginseng of the powder of grain size distribution is determined
Value range is 0.3~0.45 after the optimization of number N, chooses average model parameters N and substitutes into linearly related function Y=-bN+a, just
Can calculate grain size distribution optimization after powder in semi-coke powder A mass content Y, it is concluded that grain size distribution optimization after powder
The mass ratio of middle semi-coke powder A and semi-coke powder material B, thus using semi-coke powder A and semi-coke powder material B system after optimization grain size distribution
Standby semi-coke is starched.Grain size distribution optimization after powder in semi-coke powder A and semi-coke powder material B have reasonable size distribution, big grain
The gap between semi-coke powder is spent by small grain size semi-coke powder packed, and semi-coke particles gap is less, and packing efficiency is higher, therefore prepares
Fractional solid volume is also higher in obtained semi-coke slurry, to improve the concentration of semi-coke slurry；In addition, due to semi-coke in semi-coke slurry
Void among particles are less, and the moisture that gap absorbs is reduced, and the water form as much as possible with " Free water " in semi-coke slurry is deposited
So that coal dust is flowed, and play the role of lubrication, to reduce the apparent viscosity of water-coal-slurry, further increases semi-coke slurry
Concentration.
Since semi-coke slurry of the invention belongs to one of water-coal-slurry, water-coal-slurry obeys Gao Dengshuziman particle-size distribution model
Granular system, Andreason experimentally determines that model parameter n packing efficiency at 0.3~0.5 is higher, especially when
When n=0.37, the voidage between coal dust is minimum, the packing efficiency highest of coal dust.Referring to above-mentioned theory, by a large amount of different grain size grades
The powder matched carries out slurrying experiment, the average model parameters N value of the powder after calculating different grain size gradation, then respectively to difference
The made semi-coke slurry of the powder of grain size distribution carries out the test of the correlated performances such as concentration, viscosity, stability, wherein viscosity measurements use
Rotary viscometer NXS-4C, the semi-coke slurry by viscosity less than 1200mPas are considered as the qualified semi-coke met the requirements and starch, stability
Referring to standard GB/T/T18856.1~14-2002 " water-coal-slurry quality test method ", it will stand not generate for 3 days and precipitate firmly
Semi-coke slurry is considered as qualified semi-coke slurry.The average model parameters N and packing efficiency of powder after investigating different grain size gradation of the present invention
Between relationship, it is believed that viscosity is low, concentration is high, stability is good semi-coke slurry has preferable packing efficiency, according to test result
When the average model parameters N of powder after determining grain size distribution optimization is 0.3~0.45, the packing efficiency of obtained semi-coke slurry is most
The stability of height, semi-coke slurry is more preferable, i.e. the packing efficiency highest of powder after grain size distribution optimization, under same concentrations, when N value
Less than 0.3 or when being greater than 0.45, prepared semi-coke slurry partial properties are unsatisfactory for requiring.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that semi-coke described in step 1 by
Jurassic Basins in Northwestern China low-disintegration coal low temperature distillation is made.The output of the Northwest's semi-coke ranks the first in the whole nation at present, but due to
The increasing of the transition of coal in China industry and environmentally friendly dynamics in recent years, leads to the Northwest's semi-coke overproduction, and semi-coke is because of it
Intensity and crush resistance are poor, and a large amount of semi-coke powder are generated during production, transport, storage and generally use pulverized coal pyrolysis in recent years
Technique directly generates a large amount of semi-coke powder.Semi-coke powder is because its undersized is unable to satisfy technique requirement, and being thrown aside heap is stored in river mostly
Road or the edge of a field, or sell as low price fuel, not only make the wasting of resources, economic benefit decline, while outdoor accumulation
Serious dust pollution is more easily caused, therefore how preferably to become urgent problem to be solved using northwest semi-coke.By semi-coke
The technology of semi-coke slurry is used to prepare as a branch of COAL-WATER SLURRY TECHNOLOGY and an important composition portion of clean coal technology
Point.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that grinding described in step 1
Equipment is rod mill, and the bar ratio in the rod mill process of lapping is (5.67~11.5): 1.Divided by a large number of experiments
Analyse and compare and learn, using rod mill as the grinding efficiency of milling apparatus and the semi-coke under the conditions of bar ratio higher, institute
Semi-coke Powder Particle Size distribution processed complies with standard, and prepared semi-coke starches better performances.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that m kind particle size fraction in step 201
The mass content of semi-coke powder A is gradually increased by the arithmetic progression that tolerance is 0.1~0.2 in powder after matching.Choose above-mentioned m kind
Powder after grain size distribution is the sample for more uniform selection grain size distribution, to acquire more accurately m particle size fraction
The average model parameters N of powder after matching, obtained linear fit curve are more acurrate.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that average mould described in step 205
Shape parameter N is 0.37.Relationship between the average model parameters N and packing efficiency of powder after investigating different grain size gradation, obtains
Out when average model parameters N is 0.37, the packing efficiency highest of the powder after grain size distribution substitutes into 0.37 in step 204
The linearly related function Y=-bN+a that linear fit obtains, can calculate the mass content of semi-coke powder A in optimal grain size distribution
Y, it is concluded that in optimal grain size distribution semi-coke powder A and semi-coke powder material B mass ratio.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that the slurry of semi-coke described in step 3
By following mass percent at being grouped as: semi-coke 60%~69%, dispersing agent 0.5%~1.0%, water 30%~39.5%.
The raw material composition of the proportion can guarantee that the concentration of semi-coke slurry is higher, while guarantee it with mobility.
A kind of above-mentioned semi-coke based on grain size distribution starches preparation method, which is characterized in that the dispersing agent is nonionic
Type dispersing agent or anionic dispersing agent.Since semi-coke powder surface is hydrophobic structure, easy agglomerate precipitating in water, using it is non-from
Subtype dispersing agent or anionic dispersing agent can improve coal surface hydrophilicity, keep coal grain preferably wetted and evenly dispersed,
Improve fluidity of slurry.Meanwhile finer and close three are formed on semi-coke surface after semi-coke particles, dispersing agent and hydrone interaction
Hydration shell is tieed up, makes to be not easy to coalesce when particle is adjacent to each other to form bulky grain, produces the effect of space isolation steric hindrance, increase orchid
The stability of charcoal slurry.Non-ionic dispersing agent can starch dispersing agent for itaconic acid type water coke in the present invention, and anionic dispersing agent can
For sodium lignin sulfonate or sodium humate.
Compared with the prior art, the present invention has the following advantages: the present invention is using grain size distribution to the shadow of water semi-coke slurry performance
It rings, using the semi-coke powder of two kinds of different-grain diameters of the semi-coke powder A of small particle and large-sized semi-coke powder material B as raw material, using sharp
Size distribution after the measuring and calculating m kind grain size distribution of light Particle Size Analyzer in powder, and by Gao Dengshuziman particle-size distribution model, it is right
In powder after m kind grain size distribution after average model parameters N and m the kind grain size distribution of powder the mass content Y of semi-coke powder A into
Row linear fit obtains linearly related function Y=-bN+a, then determines powder average model parameters N after grain size distribution optimizes
Optimization range is 0.3~0.45, then is substituted into linearly related function Y=-bN+a, blue in the powder after obtaining grain size distribution optimization
The mass ratio of charcoal powder A and semi-coke powder material B, since semi-coke powder A and semi-coke powder material B will form bimodal grade in pulping process
Match, small size particle is filled in the gap between large-size particles, the packing efficiency of semi-coke powder is improved, to reduce semi-coke
The viscosity of slurry improves slurry concentration, and semi-coke slurry is made to have fabulous mobility and stability.
Below by drawings and examples, the present invention is described in further detail.
Detailed description of the invention
Fig. 1 is linear correlation functional arrangement obtained in 1~embodiment of the embodiment of the present invention 3 and comparative example 1, comparative example 2.
Fig. 2 is linear correlation functional arrangement obtained in the embodiment of the present invention 4.
Specific embodiment
The type of the laser fineness gage used in 1~embodiment of the embodiment of the present invention 4 and 1~comparative example of comparative example 2
It number is LS230VSM, semi-coke used originates from northern Shensi, be made by Jurassic Basins in Northwestern China low-disintegration coal low temperature distillation, average particle size
It is 30mm~70mm, the composition analysis result of semi-coke is shown in Table down 1, and the elemental analysis of semi-coke see the table below 2.
In the Evaluation results for the semi-coke slurry that 1~embodiment of embodiment 4 and 1~comparative example of comparative example 2 are prepared,
Viscosity is measured using Chengdu NXS-4C viscosity in aqueous coal slurries meter, and syneresis rate refers to that syneresis rate for 24 hours, rate of deposition press national standard GB/T
18856.4-2002 static stability measuring method measures in water-coal-slurry quality test method.
The composition analysis result of 1 semi-coke of table
The elemental analysis of 2 semi-coke of table
Embodiment 1
The present embodiment based on grain size distribution semi-coke slurry preparation method the following steps are included:
Step 1: being crushed using crusher to raw material semi-coke, then broken semi-coke is carried out using rod mill
Grinding prepares two kinds of semi-coke powders with different average particle sizes by the time of control grinding, wherein after ore grinding 125min
Semi-coke powder A is obtained, the average particle size of the semi-coke powder A is 0.12mm~0.38mm, and ore grinding 45min obtains semi-coke powder material B,
The average particle size of the semi-coke powder material B is 0.04mm~0.075mm；Bar ratio in the rod mill process of lapping is 9:1, stick
The frotton of grinding machine is made of big stick-means of intimidation, medium rod and spillikin, wherein the quality of big stick-means of intimidation is 693.75g, diameter 1.8cm, and length is
28.5cm, the quality of medium rod are 521.25g, diameter 1.5cm, length 28.5cm, and the quality of spillikin is 450.63g, diameter
For 1.2cm, length 28.5cm, the quantity of big stick-means of intimidation, medium rod and spillikin is respectively 4,7 and 17；
Step 2: carrying out grain size distribution optimization, detailed process to semi-coke powder A obtained in step 1 and semi-coke powder material B
Are as follows:
Step 201, to semi-coke powder A and semi-coke powder material B according to 1:9,2:8,3:7,4:6,5:5,6:4,7:3,8:2,9:1
9 kinds of different mass ratioes carry out grain size distribution respectively, the powder after obtaining 9 kinds of grain size distributions, by the powder after 9 kinds of grain size distributions
The mass content of semi-coke powder A in powder in body after every kind of grain size distribution is denoted as Y, then after above-mentioned 9 kinds of grain size distributions
The mass content Y of semi-coke powder A is respectively 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8 and 0.9 in powder；
Step 202, using laser fineness gage respectively to the powder after 9 kinds of grain size distributions obtained in step 201 into
Row measuring and calculating, the size distribution in powder after respectively obtaining every kind of grain size distribution, as a result as shown in table 3 below, wherein every kind of granularity
The mass content of semi-coke powder of the granularity less than 0.075mm is Q in powder after gradation1, granularity be more than or equal to 0.075mm and small
In 0.125mm semi-coke powder mass content be Q2, granularity be more than or equal to 0.125mm and be less than 0.180mm semi-coke powder
Mass content be Q3, it is Q that granularity, which is more than or equal to 0.180mm and the mass content of the semi-coke powder less than or equal to 0.45mm,4；
The size distribution in powder after 9 kinds of grain size distributions of 3 embodiment 1 of table
| Y | Q1 | Q2 | Q3 | Q4 |
| 0.1 | 0.4947 | 0.0754 | 0.5.73 | 0.3726 |
| 0.2 | 0.5070 | 0.0800 | 0.5.90 | 0.3540 |
| 0.3 | 0.5330 | 0.1100 | 0.1170 | 0.2400 |
| 0.4 | 0.5820 | 0.1200 | 0.0940 | 0.2040 |
| 0.5 | 0.5840 | 0.1040 | 0.1330 | 0.1790 |
| 0.6 | 0.6690 | 0.1080 | 0.0960 | 0.1270 |
| 0.7 | 0.7050 | 0.1180 | 0.0901 | 0.0869 |
| 0.8 | 0.8490 | 0.0768 | 0.0707 | 0.0035 |
| 0.9 | 0.8384 | 0.0893 | 0.0694 | 0.0029 |
The size distribution in powder after step 203, every kind of grain size distribution according to obtained in step 202 counts every kind of grain
The average model parameters N of powder after spending gradation, detailed process is as follows: first with Gao Dengshuziman particle-size distribution model formula T
=dn/dmax nThe model parameter n of semi-coke powder of the granularity less than d in powder after calculating every kind of grain size distribution, wherein d is some
Granularity, mass content of the T for semi-coke powder of the granularity less than d in the powder after every kind of grain size distribution, dmaxFor every kind of grain size distribution
Maximum semi-coke particles granularity in powder afterwards, granularity is less than the orchid of 0.075mm in powder after calculating every kind of grain size distribution
The model parameter n of charcoal powder1When, d 0.075mm, T1=Q1, granularity is less than in powder after calculating every kind of grain size distribution
The model parameter n of the semi-coke powder of 0.125mm2When, d 0.125mm, T2=Q1+Q2, powder after calculating every kind of grain size distribution
The model parameter n of powder of the granularity less than 0.180mm in body3When, d 0.180mm, T3=Q1+Q2Then+Q3 takes n1、n2And n3
Average model parameters N of the average value as the powder after every kind of grain size distribution, as a result as shown in table 4 below；
The T in powder after 9 kinds of grain size distributions of 4 embodiment 1 of table1、T2、T3Mass content
Step 204, the average model parameters that the powder after 9 kinds of grain size distributions is calculated using the method in step 203, respectively
The average model parameters N of powder after obtaining 9 grain size distributions, as a result as shown in table 5 below, then with the powder after grain size distribution
The mass content Y of middle semi-coke powder A is abscissa, and the model parameter N of the powder after grain size distribution is that ordinate carries out Linear Quasi
It closes, linearly related function Y=-1.8918N+0.9514 is obtained, as shown in Figure 1, i.e. a=0.9514, b=1.8918；
The average model parameters N in powder after 9 kinds of grain size distributions of 5 embodiment 1 of table
Step 205, selection average model parameters N are 0.37 and substitute into the linearly related function Y=- in step 204
In 1.8918N+0.9514, the mass content of semi-coke powder A is 0.25 in the powder after calculating grain size distribution optimization, thus
Semi-coke powder A and the mass ratio of semi-coke powder material B are 1:3 in powder after to grain size distribution optimization；
Step 3: the grain size distribution according to obtained in step 205 optimization after powder in semi-coke powder A and semi-coke powder material B
Mass ratio be that 1:3 carries out ingredient, then plus water and dispersant are uniformly mixing to obtain semi-coke slurry；The semi-coke slurry is by following
Mass percent at being grouped as: semi-coke 65%, dispersing agent 0.8%, water 34.2%.
Dispersing agent described in the present embodiment is non-ionic dispersing agent, and the non-ionic dispersing agent selects itaconic acid type water
Coke slurry dispersing agent.(itaconic acid type water coke slurry dispersing agent is disclosed in Materials Science Forum；Synthesis
and Application of Itaconic Acid Water-coke Slurry Dispersant,Materials
Science Forum,Vol896,pp167-174)。
Semi-coke manufactured in the present embodiment is starched and carries out performance evaluation, semi-coke slurry manufactured in the present embodiment is being sheared as the result is shown
Rate is 100s-1When viscosity be 798mPas, and syneresis rate is 0, generates after placing 72 hours without hard precipitating, shows this reality
The semi-coke slurry for applying example preparation has fabulous mobility and stability.
Embodiment 2
The present embodiment difference from example 1 is that: the bar ratio in rod mill process of lapping described in step 1
For 11.5:1；Average model parameters N is chosen in step 205 to be 0.3 and substitute into the linearly related function Y=- in step 204
In 1.8918N+0.9514, the mass content of semi-coke powder A is 0.38 in the powder after calculating grain size distribution optimization, thus
Semi-coke powder A and the mass ratio of semi-coke powder material B are 38:62 in powder after to grain size distribution optimization；Semi-coke described in step 3
Slurry is by following mass percent at being grouped as: semi-coke 69%, dispersing agent 1.0%, water 30%.
Semi-coke manufactured in the present embodiment is starched and carries out performance evaluation, semi-coke slurry manufactured in the present embodiment is being sheared as the result is shown
Rate is 100s-1When viscosity be 845mPas, and syneresis rate is 0, generates after placing 72 hours without hard precipitating, shows this reality
The semi-coke slurry for applying example preparation has fabulous mobility and stability.
Embodiment 3
The present embodiment difference from example 1 is that: the bar ratio in rod mill process of lapping described in step 1
For 5.67:1；Average model parameters N is chosen in step 205 to be 0.45 and substitute into the linearly related function Y=- in step 204
In 1.8918N+0.9514, the mass content of semi-coke powder A is 0.1 in the powder after calculating grain size distribution optimization, thus
Semi-coke powder A and the mass ratio of semi-coke powder material B are 1:9 in powder after to grain size distribution optimization；The slurry of semi-coke described in step 3
By following mass percent at being grouped as: semi-coke 60%, dispersing agent 0.5%, water 39.5%.
Semi-coke manufactured in the present embodiment is starched and carries out performance evaluation, semi-coke slurry manufactured in the present embodiment is being sheared as the result is shown
Rate is 100s-1When viscosity be 807mPas, and syneresis rate is 0.07%, generates, shows without hard precipitating after placing 72 hours
Semi-coke slurry manufactured in the present embodiment has fabulous mobility and stability.
Comparative example 1
This comparative example difference from example 1 is that: it is 0.25 and generation that average model parameters N is chosen in step 205
Enter in the linearly related function Y=-1.8918N+0.9514 in step 204, it is blue in the powder after calculating grain size distribution optimization
The mass content of charcoal powder A is 0.48, to obtain semi-coke powder A and semi-coke powder material B in the powder after grain size distribution optimization
Mass ratio is 48:52.
Performance evaluation is carried out to the semi-coke slurry of this comparative example preparation, the semi-coke slurry of this comparative example preparation is being sheared as the result is shown
Rate is 100s-1When viscosity be 965mPas, and syneresis rate is 0.36%, and placing has minimal amount of hard precipitating production for 36 hours
It is raw.
Comparative example 2
This comparative example difference from example 1 is that: it is 0.46 and generation that average model parameters N is chosen in step 205
Enter in the linearly related function Y=-1.8918N+0.9514 in step 204, it is blue in the powder after calculating grain size distribution optimization
The mass content of charcoal powder A is 0.08, to obtain semi-coke powder A and semi-coke powder material B in the powder after grain size distribution optimization
Mass ratio is 8:92.
Performance evaluation is carried out to the semi-coke slurry of this comparative example preparation, the semi-coke slurry of this comparative example preparation is being sheared as the result is shown
Rate is 100s-1When viscosity be 965mPas, and syneresis rate is 0.16%, and placing has minimal amount of hard precipitating production for 12 hours
It is raw.
Embodiment 1, comparative example 1 and comparative example 2 are compared to the average mould as can be seen that powder after different grain size gradation
For the value of shape parameter N less than 0.3 or when being greater than 0.45, the semi-coke slurry of preparation is 100s in shear rate-1When viscosity increase, stream
Dynamic property is deteriorated, and water absorption rate increases, bad stability, illustrates that the range of powder average model parameters N after grain size distribution optimizes is
When 0.3~0.45, semi-coke powder A and semi-coke powder material B will form bimodal gradation in pulping process, and small size particle is filled in greatly
Gap between particles, improves the packing efficiency of semi-coke powder, to reduce the viscosity of semi-coke slurry, has semi-coke slurry
Fabulous mobility and stability.
Embodiment 4
The present embodiment based on grain size distribution semi-coke slurry preparation method the following steps are included:
Step 1: identical as the step one in embodiment 1；
Step 2: carrying out grain size distribution optimization, detailed process to semi-coke powder A obtained in step 1 and semi-coke powder material B
Are as follows:
It is step 201, different according to 4 kinds of 15:85,35:65,55:45,75:25 to semi-coke powder A and semi-coke powder material B
Mass ratio carries out grain size distribution respectively, the powder after obtaining 4 kinds of grain size distributions, by every kind of grain in the powder after 4 kinds of grain size distributions
The mass content of the semi-coke powder A in powder after degree gradation is denoted as Y, then semi-coke in the powder after above-mentioned 4 kinds of grain size distributions
The mass content Y of powder A is respectively 0.15,0.35,0.55 and 0.75；
Step 202, using laser fineness gage respectively to the powder after 4 kinds of grain size distributions obtained in step 201 into
Row measuring and calculating, the size distribution in powder after respectively obtaining every kind of grain size distribution, as a result as shown in table 6 below, wherein every kind of granularity
The mass content of semi-coke powder of the granularity less than 0.075mm is Q in powder after gradation1, granularity be more than or equal to 0.075mm and small
In 0.125mm semi-coke powder mass content be Q2, granularity be more than or equal to 0.125mm and be less than 0.180mm semi-coke powder
Mass content be Q3, it is Q that granularity, which is more than or equal to 0.180mm and the mass content of the semi-coke powder less than or equal to 0.45mm,4；
The size distribution in powder after 4 kinds of grain size distributions of 6 embodiment 4 of table
| Y | Q1 | Q2 | Q3 | Q4 |
| 0.15 | 0.4991 | 0.792 | 0.584 | 0.3633 |
| 0.35 | 0.5554 | 0.1165 | 0.1045 | 0.2236 |
| 0.55 | 0.6106 | 0.1054 | 0.1268 | 0.1572 |
| 0.75 | 0.7676 | 0.0937 | 0.0801 | 0.0586 |
The size distribution in powder after step 203, every kind of grain size distribution according to obtained in step 202, calculates separately 4
The average model parameters N of powder in powder after kind grain size distribution after every kind of grain size distribution, detailed process is as follows: first with height
Deng Shuziman particle-size distribution model formula T=dn/dmax nGranularity is less than the semi-coke powder of d in powder after calculating every kind of grain size distribution
The model parameter n of material, wherein d is some granularity, and T is semi-coke powder of the granularity less than d in the powder after every kind of grain size distribution
Mass content, dmaxFor the maximum semi-coke particles granularity in the powder after every kind of grain size distribution, after calculating every kind of grain size distribution
The model parameter n of semi-coke powder of the granularity less than 0.075mm in powder1When, d 0.075mm, T1=Q1, when every kind of granularity of calculating
The model parameter n of semi-coke powder of the granularity less than 0.125mm in powder after gradation2When, d 0.125mm, T2=Q1+Q2, when
The model parameter n of powder of the granularity less than 0.180mm in powder after calculating every kind of grain size distribution3When, d 0.180mm, T3=
Q1+Q2+Q3, then take n1、n2And n3Average model parameters N of the average value as the powder after every kind of grain size distribution, as a result such as
Shown in the following table 7；
The T in powder after 4 kinds of grain size distributions of 7 embodiment 4 of table1、T2、T3Mass content
Step 204, the average model parameters that the powder after 4 kinds of grain size distributions is calculated using the method in step 203, respectively
The average model parameters N of powder after obtaining 4 grain size distributions, as a result as shown in table 8 below, then with the powder after grain size distribution
The mass content Y of middle semi-coke powder A is abscissa, and the model parameter N of the powder after grain size distribution is that ordinate carries out Linear Quasi
It closes, linearly related function Y=-0.5118N+0.4985 is obtained, as shown in Fig. 2, i.e. a=0.4985, b=0.5118；
The average model parameters N in powder after 4 kinds of grain size distributions of 8 embodiment 4 of table
Step 205, selection average model parameters N are 0.37 and substitute into the linearly related function Y=- in step 204
In 0.5118N+0.4985, the mass content of semi-coke powder A is 0.31 in the powder after calculating grain size distribution optimization, thus
Semi-coke powder A and the mass ratio of semi-coke powder material B are 3:7 in powder after to grain size distribution optimization；
Step 3: the grain size distribution according to obtained in step 205 optimization after powder in semi-coke powder A and semi-coke powder material B
Mass ratio be that 3:7 carries out ingredient, then plus water and dispersant are uniformly mixing to obtain semi-coke slurry；The semi-coke slurry is by following
Mass percent at being grouped as: semi-coke 60%, dispersing agent 0.5%, water 39.5%.
Dispersing agent described in the present embodiment is anionic dispersing agent, and the anionic dispersing agent selects lignin sulfonic acid
Sodium or sodium humate.
Semi-coke manufactured in the present embodiment is starched and carries out performance evaluation, semi-coke slurry manufactured in the present embodiment is being sheared as the result is shown
Rate is 100s-1When viscosity be 798mPas, and syneresis rate is 0, generates after placing 72 hours without hard precipitating, shows this reality
The semi-coke slurry for applying example preparation has fabulous mobility and stability.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way.It is all according to invention skill
Art any simple modification, change and equivalence change substantially to the above embodiments, still fall within technical solution of the present invention
Protection scope in.
Claims (7)
1. a kind of semi-coke based on grain size distribution starches preparation method, which is characterized in that method includes the following steps:
Step 1: successively raw material semi-coke is crushed and is ground, two kinds of semi-coke powders with different average particle sizes are obtained, point
It Biao Ji not be powder A and semi-coke powder material B；The average particle size of the semi-coke powder A is 0.12mm~0.38mm, the semi-coke
The average particle size of powder material B is 0.04mm~0.075mm；
Step 2: carrying out grain size distribution optimization, detailed process to semi-coke powder A obtained in step 1 and semi-coke powder material B are as follows:
Step 201 carries out grain size distribution according to the different mass ratio of m kind with semi-coke powder material B to semi-coke powder A respectively, obtains m kind
Powder after grain size distribution, by the matter of the semi-coke powder A in the powder after every kind of grain size distribution in the powder after m kind grain size distribution
Amount content is denoted as Y；The m is the positive integer greater than 3；
Step 202 respectively surveys the powder after m kind grain size distribution obtained in step 201 using laser fineness gage
It calculates, the size distribution in powder after respectively obtaining every kind of grain size distribution, wherein granularity is small in the powder after every kind of grain size distribution
In 0.075mm semi-coke powder mass content be Q1, granularity be more than or equal to 0.075mm and be less than 0.125mm semi-coke powder
Mass content be Q2, granularity be more than or equal to 0.125mm and less than 0.180mm semi-coke powder mass content be Q3, granularity is big
It is Q in being equal to 0.180mm and being less than or equal to the mass content of the semi-coke powder of 0.45mm4；
The size distribution in powder after step 203, every kind of grain size distribution according to obtained in step 202 calculates every kind of granularity
The average model parameters N of powder after gradation, detailed process is as follows: first with Gao Dengshuziman particle-size distribution model formula T=
dn/dmax nThe model parameter n of semi-coke powder of the granularity less than d in powder after calculating every kind of grain size distribution, wherein d is some grain
Degree, mass content of the T for semi-coke powder of the granularity less than d in the powder after every kind of grain size distribution, dmaxAfter every kind of grain size distribution
Powder in maximum semi-coke particles granularity, granularity is less than the semi-coke of 0.075mm in powder after calculating every kind of grain size distribution
The model parameter n of powder1When, d 0.075mm, T1=Q1, granularity is less than in powder after calculating every kind of grain size distribution
The model parameter n of the semi-coke powder of 0.125mm2When, d 0.125mm, T2=Q1+Q2, powder after calculating every kind of grain size distribution
The model parameter n of powder of the granularity less than 0.180mm in body3When, d 0.180mm, T3=Q1+Q2+Q3, then take n1、n2And n3
Average model parameters N of the average value as the powder after every kind of grain size distribution；
Step 204, the average model parameters that the powder after the grain size distribution of m kind is calculated using the method in step 203, are respectively obtained
The average model parameters N of powder after m grain size distribution, then with every kind of grain size distribution in the powder after m kind grain size distribution after
Powder in the mass content Y of semi-coke powder A be abscissa, the average model parameters N of the powder after every kind of grain size distribution is
Ordinate carries out linear fit, obtains linearly related function Y=-bN+a, wherein a and b are all larger than zero；
Step 205, the average model parameters N that the powder after grain size distribution is determined according to the packing efficiency of the powder after grain size distribution
Optimization value range be 0.3~0.45, choose average model parameters N simultaneously substitute into the linearly related function Y=- in step 204
In bN+a, the mass content of semi-coke powder A in the powder after calculating grain size distribution optimization, thus after obtaining grain size distribution optimization
Powder in semi-coke powder A and semi-coke powder material B mass ratio；
Step 3: the grain size distribution according to obtained in step 205 optimization after powder in semi-coke powder A and semi-coke powder material B matter
Amount is than carrying out ingredient, and then plus water and dispersant are uniformly mixing to obtain semi-coke slurry.
2. a kind of semi-coke based on grain size distribution according to claim 1 starches preparation method, which is characterized in that in step 1
The semi-coke is made by Jurassic Basins in Northwestern China low-disintegration coal low temperature distillation.
3. a kind of semi-coke based on grain size distribution according to claim 1 starches preparation method, which is characterized in that in step 1
The equipment of the grinding is rod mill, and the bar ratio in the rod mill process of lapping is (5.67~11.5): 1.
4. a kind of semi-coke based on grain size distribution according to claim 1 starches preparation method, which is characterized in that step 201
The mass content of semi-coke powder A is gradually increased by the arithmetic progression that tolerance is 0.1~0.2 in powder after middle m kind grain size distribution.
5. a kind of semi-coke based on grain size distribution according to claim 4 starches preparation method, which is characterized in that step 205
Described in average model parameters N be 0.37.
6. a kind of semi-coke based on grain size distribution according to claim 1 starches preparation method, which is characterized in that in step 3
Semi-coke slurry is by following mass percent at being grouped as: semi-coke 60%~69%, dispersing agent 0.5%~1.0%, water 30%
~39.5%.
7. a kind of semi-coke based on grain size distribution according to claim 1 or 6 starches preparation method, which is characterized in that described
Dispersing agent is non-ionic dispersing agent or anionic dispersing agent.
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