CN108483450A - A kind of preparation method of biomass white carbon black raw material rice hull ash - Google Patents
A kind of preparation method of biomass white carbon black raw material rice hull ash Download PDFInfo
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- CN108483450A CN108483450A CN201810242645.4A CN201810242645A CN108483450A CN 108483450 A CN108483450 A CN 108483450A CN 201810242645 A CN201810242645 A CN 201810242645A CN 108483450 A CN108483450 A CN 108483450A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The present invention relates to a kind of preparation methods of biomass white carbon black raw material rice hull ash, belong to chemical material technical field.The present invention provides a kind of preparation method of rice hull ash, including combusting rice hull is obtained rice hull ash, and wherein combusting rice hull is carried out in controlled aerobic wind volume under anoxic wind volume ratio.By by one or more parameters of the present invention and process regulation within the scope of the invention, the content of organic impurities in rice hull ash can be significantly reduced under the same conditions in other technological parameters, improve the application performance of rice husk source white carbon, performance can compare favourably with the white carbon in ore in sand form source.When the white carbon of the present invention is used to prepare rubber as reinforcing filler, the mechanical property of rubber product, such as tensile strength can be significantly improved.
Description
Technical field
The present invention relates to a kind of preparation methods of biomass white carbon black raw material rice hull ash, belong to chemical material technical field.
Background technology
White carbon is amorphous hydrated silica, and research origin is in Germany, initially using silica sand as raw material, using precipitation
It is prepared by method.Since white carbon has strong large specific surface area, porous, high temperature resistant, electrical insulating property, good strengthening action and non-ignitable
The characteristics such as burning can obtain reinforcing effect same as carbon black when using it for alternative carbon black reinforced rubber product.Again because outside it
It sees to be white, therefore is known as " white carbon ".Since white carbon has the multiple performances such as strong benefit property, dispersibility, be it is a kind of very
It is many to be widely used in latex, rubber, plastics, coating, cosmetics, medicine, pesticide and food etc. for important chemical products
Field.
The preparation method of white carbon includes heat treating process (such as vapor phase method) and the precipitation method (also known as liquid phase method) in the prior art.
Wherein, the precipitation method are the wider methods of current application range, are had been reported that respectively with nonmetallic ore, industrial by-products, agriculture by-product
Object (such as rice hull ash) is that raw material prepares white carbon.To that in the research of the precipitation method, according to the difference of acidulant type, can be divided into
The strong acid precipitation method, CO2The precipitation method, organic acid precipitation method and the alkali activator precipitation method.Compared to heat treating process, the precipitation method, which have, to be set
The advantages that standby simple, at low cost, and can have different performance by the way that different surfactants is added and obtains, meet different need
The white carbon black product asked.However, precipitation method technique in the prior art that there is typically further such as complex process, product purity is low,
The deficiencies of long preparation period.To solve these problems, people have carried out a variety of trials.For example, Chinese patent application
201410020643.2 attempt to remove the metal in rice hull ash raw material and intermediate product by the washing operation of chelating agent aqueous solution
Impurity, to promote the dissolution rate of silica in rice hull ash, so as to improve hard charcoal Black-White and purity.In addition, Chinese patent Shen
Please 201380045728.X also disclose a kind of preparation method of white carbon, wherein in post-processing stages, i.e. white carbon mashing is washed
The polybasic carboxylic acids such as the stage addition methylglutaric acid washed, so as to improve the application performance of white carbon.However, the above method is mainly
White carbon performance is improved by using high-cost auxiliary agent, increases the complexity of technique.Also, this analog assistant may be to hard charcoal
Black product causes secondary pollution, introduces new impurity.For this purpose, above-mentioned deficiency, Yi Jigeng can be effectively improved by still needing to further develop
Suitable for the method for large-scale production rice hull ash, improve the performance of rice hull ash, and uses it for preparing white carbon and improve white carbon
Downstream product, for example, rubber performance.
Invention content
To improve above-mentioned technical problem, the present invention provides a kind of preparation method of rice hull ash, including combusting rice hull is obtained
Rice hull ash, wherein rice husk are burnt in the presence of aerobic wind and anoxic wind, and within the unit interval, rice husk is in controlled aerobic wind volume
With burn under the ratio of anoxic wind volume and/or rice husk controlled anoxic wind the amount of blasting (m3) with the quality (t) of rice husk
It burns under ratio.
According to the present invention, wherein in the unit interval, the controlled aerobic wind volume refers to adjusting with anoxic wind volume ratio
Aerobic wind volume and anoxic wind volume ratio, for example, make aerobic wind volume and anoxic wind volume ratio be more than 5.1: 1, such as 5.5: 1 with
On, such as 6: 1-10: 1 or 6: 1-8: 1.
According to the present invention, the amount of the blasting (m of the controlled anoxic wind3) ratio with the quality (t) of rice husk, such as unit
The amount of the blasting (m of anoxic wind in time3) with the ratio of the quality (t) of rice husk it is 600: 1 or more, such as 600: 1-1000: 1, such as
650∶1-900∶1。
The gas being passed through according to the present invention, in the unit interval in boiler can be divided into two kinds：First air and Secondary Air；Wherein,
First air includes for blasting the air of fuel (such as rice husk) and the anoxic wind blasted, and Secondary Air may include by the pre-heat treatment
Hot-air afterwards.
Preferably, the aerobic bellows chamber include be passed through in the unit interval in the First air of boiler for blast fuel air and
The Secondary Air of boiler is passed through in unit interval.
According to the present invention, the wherein temperature of anoxic wind can be 100-200 DEG C；For example, anoxic wind before blasting boiler, passes through
Go through the process of purification, heat exchange；
Preferably, the oxygen content in the aerobic wind can be 10 volume % or more, such as 15 volume % or more, for example, about 20
About 25 volume % of volume %-, the example can be air；
Preferably, the oxygen content of the anoxic wind is less than aerobic wind, is, for example, less than 10 volume %, such as less than 5 volume %, such as
3-5 volume %, the example can be the tail gas after fuel, such as combusting rice hull；
Preferably, the aerobic wind and anoxic wind blast boiler simultaneously through different channels, to be mixed in boiler.
As example, rice husk can be delivered to boiler combustion zone by positive pressure and burn.
Embodiment according to the present invention, the rice hull ash can be prepared via a method which：
B1) by rice husk merging boiler combustion zone burning, rice hull ash initial material is obtained；
B2) by step b1) by screening, rice hull ash is obtained after removing impurity obtained rice hull ash initial material.
According to the present invention, rice husk usually enters boiler combustion zone with the posture of projectile.Into after boiler combustion zone, rice husk with
Temperature increases dry gradually experience, cracking, gasification.Rice husk after burning can gradually fall into burner hearth bottom rotation under the effect of gravity
Fire grate area on, temperature is gradually reduced.Rice husk in fire grate area is further decomposed at a relatively high temperature, charing,
A series of chemical changes such as gasification are eventually converted into rice hull ash after discharging heat.
The temperature of embodiment according to the present invention, boiler combustion zone (i.e. burner hearth or hearth zone) can be in such as 600-
900 DEG C, such as 600-800 DEG C, 600-700 DEG C.Residence time of the rice husk in burner hearth can be 10-60min, such as 10-30min,
Such as 15-20min.
Rice husk can be blasted boiler combustion zone by embodiment according to the present invention together with aerobic wind by wind turbine.Preferably,
Aerobic wind can be used for agitating and/or stir rice husk, and provide the aerobic environment of burning, to promote its burning.
As example, anoxic wind is blasted into boiler combustion zone from another channel, in addition to agitating and/or stirring rice husk, may be used also
To realize making full use of for tail gas.
According to the preparation method of rice hull ash of the present invention, rice hull ash that wherein combusting rice hull obtains can also be further across
Screening, to remove impurity such as brown rice, stone etc..For example, the screening can be carried out by 1-Smm (such as 2mm) straight line shaker.
Preferably, the rice hull ash after screening can also pass through separator under the conditions of negative pressure transportation again, be gone out by inertial separation
The different organic impurities of proportion, such as the part grain of rice.
The temperature of embodiment according to the present invention, fire grate area generally can be 400-500 DEG C.As example, fire grate can
Think chain crawler belt shape, and drive the rice husk for dropping down onto fire grate and/or rice hull ash to move with given pace, to which boiler be discharged.
The present invention also provides the obtained rice hull ash of the preparation method.Preferably, the phosphorus content of rice husk ash products can
Think about 10-40 weight %, for example, about 15-30 weight %, such as from about 15-25 weight %.
Embodiment according to the present invention also provides a kind of white carbon, is especially used for the system of the white carbon of reinforcing rubber
Preparation Method includes the following steps：
F1 bottom material) is provided, the bottom material contains formula M comprising described2O·nSiO2The aqueous solution of shown silicate, wherein with
SiO2A concentration of 65-85g/L, preferably 70-80g/L, further preferred 74-78g/L indicated；
F2 aqueous sulfuric acid) is added, controlling sour flow makes 20-26 minutes turbidity for 15-100FAU, preferably 22-25 minutes
Turbidity is 25-60FAU, keeps aqueous sulfuric acid flow to pH=7.0-9.0, preferably 7.5-8.5, further preferred 7.8-8.2；
F3 it) is acidified to pH=4-5.5, preferably 4.2-5, further preferred 4.5-4.9 obtains slurry F1.
Preferably, in the step f1, the bottom material temperature be 70-90 DEG C, preferably 73-89 DEG C, further preferred 75-87
℃；
Preferably, in the step f1, sodium sulphate 2-20g/L, preferably sulfur acid sodium 4.4- are contained in the bottom material
18.5g/L；
Preferably, in the step f1, contain aqueous sodium persulfate solution in the bottom material；
Preferably, in the step f1, the mass percent concentration of the aqueous sodium persulfate solution is 3-5%；
Alternatively, the aqueous sodium persulfate solution can derive from the solution of recovery；
Preferably, in the step f1, alkali metal ion in the bottom material, such as Na+Ion concentration is 0.8-1.5mol/L,
It is preferred that 0.9-1.2mol/L, further preferred 1-1.3mol/L；
Preferably, in the step f2, when the turbidity reaches 3500FAU, such as when 3800FAU or 4000FAU, heating
To 90-98, preferably 93-96 DEG C；
Preferably, in the step f2, heating rate is 0.5-1.5 DEG C/min；
Preferably, further include while sodium silicate being added after above-mentioned warming temperature reaches the temperature in the step f2
With aqueous sulfuric acid；
Preferably, in the step f2, the molar ratio for controlling sulfuric acid and sodium silicate is 1.04-1.07, preferably 1.05-
1.06；
Preferably, in the step f2, the time described while that sodium silicate and aqueous sulfuric acid is added is 10-30min, excellent
Select 15-25min；
Preferably, in the step f2, contain formula M containing described in sodium silicate2O·nSiO2Shown silicate it is water-soluble
Liquid, or formula M is contained by described2O·nSiO2The aqueous solution of shown silicate forms；
Preferably, the rice hull ash that the method for the invention is prepared contains formula M through alkali soluble acquisition is described2O·nSiO2Institute
Show the aqueous solution of silicate；
Preferably, in the step f3, acid used by the acidification is sulfuric acid or its aqueous solution；
Preferably, in the step f3, the flow velocity of aqueous sulfuric acid is controlled, makes reaction system in 3-10min, preferably 4-
Reach the pH in 8min, further preferred 5-7min；
Preferably, the mass percent concentration of the sulfuric acid is 5-10%；
Preferably, the step f3 further includes maturation stage；
Preferably, the curing time 5-15min, further preferred 7-13min, still more preferably 8-12min；
Preferably, the preparation method further includes by slurries filtration, washing, dry step；
Preferably, filter cake is liquefied using colloid mill before drying steps, obtains slurry F2；
Preferably, the pH=5-7 of the slurry F2, preferably 5.5-6.5 are adjusted before the drying steps, further preferably
5.8-6.2；
Preferably, described dry using spray drying.
According to the present invention, the proportion of the dilute sulfuric acid can be 1.010-1.100, such as 1.030-1.070.
The present invention also provides the white carbons that rice hull ash as described above is prepared.
Advantageous effect
It is regardless of and is limited to any theory, it has been recognised by the inventors that aerobic oxygenolysis mainly occurs in combustion zone for rice husk；And fire grate
The cracking of anaerobic mainly occurs for area.In combustion zone because of oxygen content abundance, the organic matters such as cellulose, starch, albumen can be quick
The substances such as carbon dioxide are converted by oxidation reaction, and are excluded with flue gas；And in combustion zone, rice husk usually can not be cmpletely
Burning, due to oxygen content deficiency when not sufficiently combusted rice husk enters fire grate area, temperature is higher, and pyrolytic reaction mainly occurs,
Macromolecular is converted into small molecule loss to the further combustion heat release in combustion zone.Pyrolytic reaction in fire grate area often leads to burning
It is insufficient, so that rice husk is remained certain physical arrangement, cellulose charcoal turns to activated carbon, and silica then still keeps its unformed
State is conducive to subsequent alkali process process.
It is a discovery of the invention that the generation that rice husk not only only carbonizes in fire grate area, while it is organic to be also accompanied by some small molecules
The formation of impurity.Further, pass through the drum of anoxic wind in the volume ratio of the aerobic wind/anoxic wind of control, or control unit interval
Enter amount (m3) with the ratio between the quality (t) of rice husk, the formation of organic impurities in rice hull ash can be influenced, it is white then to influence rice hull ash source
The application performance of carbon black and the mechanical performance of rubber., it is surprising that by by one or more ginsengs of the present invention
Number and process regulation within the scope of the invention, can improve the application performance of rice husk source white carbon, performance can with mine
The white carbon in sand source compares favourably.When the white carbon of the present invention is used to prepare rubber as reinforcing filler, can significantly change
The mechanical property of kind rubber product, such as tensile strength.
Specific implementation mode
Hereafter by the description to the embodiment of the present invention, in further detail to the above-mentioned and other characteristics and advantages of the present invention
It is explained and illustrated.It should be appreciated that the following example is intended to illustratively illustrate technical scheme of the present invention, and simultaneously
It is not intended to carry out any restrictions to the scope of the present invention defined by claim and its equivalence.
Unless otherwise indicated, material herein and reagent are commercial goods, or can by those skilled in the art according to
Prior art preparation.
Instrument and reagent
Rice husk：Beneficial sea (Jiamusi) cereal and oil industry Co., Ltd provides, wherein rice husk oversize content (weight %) 2.1；
Protein content (weight %) 2.22%；Content of starch (weight %) 1.17；Selection by winnowing oversize/(protein contains total organic impurities
Amount+content of starch) 0.9.
Caustic soda, concentration 32%, producer：Heilungkiang Hao Hua Chemical Co., Ltd.s；
Sulfuric acid, concentration 93%, producer：Jilin Long Yuan black horse chemical industry Co., Ltd；
Filter press model：XAZG224/1250-UK, producer：Filter Co., Ltd of Jian Hua group；
Drying tower model：VG6500, producer：Wuxi Si Purui drying machines factory.
It is prepared by embodiment 1-6 rice hull ash
1) prepared by rice hull ash：Same batch rice husk is delivered to Boiler Furnace chamber inner combustion, root with the flow positive pressure of table 1 respectively
It is carried out according to the 1 aerobic wind of state modulator furnace bottom (air) of table and anoxic wind (tail gas after combusting rice hull, 4 volume % of oxygen content) flow
Burning, wherein aerobic wind and anoxic wind blast boiler simultaneously through different channels, combustion temperature in hearth is at 800 DEG C, fire grate rotating speed
Adjusting control rice husk residence time in burner hearth is 15 minutes, other operations are carried out by known way, collect fire grate tail portion
The rice hull ash of discharge is as raw material.
2) rice hull ash cleans：The raw rice husk ash that step 1) is produced is gone to clean by 2mm straight line shakers and inertia separator
Matter collects the rice hull ash sample 1-6 of gained, spare.
It is prepared by embodiment 7-12 white carbons
1) prepared by sodium silicate：Rice hull ash sample each 2000g of 1-6 that embodiment 1-6 is obtained, sodium hydroxide are weighed respectively
Then 904.3g, water 9940g are added in autoclave and carry out reaction heating, start timing when pressure is raised to 3kg, react
Time is 4h, cools down pressure release after reaction, reaction slurry is filtered using filter press and is washed with 60 DEG C of warm water,
It takes cleaning solution to detect proportion in washing process, washs and terminate when cleaning solution proportion is 1.030, it is dense flower bulb to collect filtered fluid
Alkali and cleaning solution are dilute sodium silicate.
2) dense sodium silicate that step 1) obtains and dilute sodium silicate are mixed to get the sodium silicate raw material that proportion is 1.140, waited for
With.
3)
Initial period：
It is introduced in the reactor equipped with blender and steam heater：
By 5700g flower bulbs alkali liquor (modulus 2.6), 2335g aqueous sodium persulfate solutions (Na2SO4It is a concentration of 3.8%), 398g it is soft
Water mixing is used as bottom material, and bottom material is with SiO2A concentration of 76g/L, Na of meter+Concentration 1.09mol/L is heated to 79 DEG C of temperature.
Souring stage
Acid pump is opened, reactor is added with 92.4g/min flows in dilute sulfuric acid (proportion 1.050), souring stage is examined for 5 minutes
A pH is surveyed, and detects reaction system turbidity, reaction system turbidity at 23 minutes is made to reach 60FAU, keeps flow velocity to pH=
8, this stage, total measured using acid was 4623g, and acid addition time 50min is started to warm up when during which turbidity reaches 4000FAU, with 1
DEG C/min speed is warming up to 94 DEG C, amount to used time 15min and heat up 15 DEG C, temperature is kept for 94 DEG C and terminated to end reaction, obtains acid
Sodium silicate after change.
Feeding stage simultaneously
Unlatching while the process that feeds above-mentioned flower bulb alkali liquor (modulus 2.6) are added according to 68.8g/min flow velocitys, dilute sulphur
Sour flow velocity is 64g/min, and the molar ratio 1.055 of sulfuric acid and sodium silicate carries out pH detections, and adjusting sour flow makes slurry keep pH steady
It is scheduled on 8 ± 0.05.This stage sodium silicate and the total addition 3984g of acid.
Post-processing stages
The stage is the pH decline stages, and being passed through dilute sulfuric acid makes pH value be down to 4.5.
After curing ten minutes, reaction slurry is filtered using plate type pressure filter and is washed using soft water, is obtained
Filter cake is become liquid slurry from solid using colloid mill, adjusts slurry pH value to 6 by white carbon filter cake (water content 81%).Make
It is dried with spray drying tower, the white carbon finished product of output embodiment 1-6.
13 rubber performance of embodiment is tested
Refining glue mode is mixer mixing, with specific reference to Chinese patent application CN201210423251.1 embodiments 1, according to
The formula of the following table 2 carries out.
Table 2
| Component | Parts by weight |
| Solution polymerized butylbenzene | 144 |
| Butadiene rubber | 36 |
| Zinc oxide | 4.8 |
| Stearic acid | 3.6 |
| White carbon sample 1-6 | 100.8 |
| Silicon -69 (double-[γ-(triethoxysilicane) propyl] tetrasulfide) | 4.8 |
| CBS (N- cyclohexyl -2- benzothiazole sulfonamides) | 2.88 |
| DPG (diphenylguanidine) | 2.7 |
| 4020 (N- (1,3- dimethyl) butyl-N '-diphenyl-para-phenylene diamine) | 3.6 |
| DTPD (N, N '-DTPD di tolyl p phenylenediamine (mixture)) | 1.35 |
| Sulphur | 2.7 |
| It amounts to | 308.43 |
Banburying process：
First segment is kneaded：Closed-smelting machine rotor rotating speed 45rpm, pressure pressure 0.6MPa, first by solution polymerized butadiene styrene rubber and suitable
Buna throws into chamber body of mixer, is kneaded 30s, then by white carbon, silane coupling agent (silicon -69) puts into banburying chamber, continues to mix
Refining 100 seconds, sizing material temperature reaches 120 DEG C, carries stone roller 5 seconds, and adjustment rotor speed is 30rpm, and pressure is kneaded 90 seconds, and sizing material temperature is
150 DEG C, dumping obtains one section of rubber compound, and one section of rubber compound is cooled to room temperature in air.
Second segment is kneaded：One section of rubber compound is put into mixer by closed-smelting machine rotor rotating speed 45rpm, pressure pressure 0.6MPa
Zinc oxide is added in kneading chamber, and stearic acid, anti-aging agent (4020 and DTPD), pressure mixing 110 seconds, sizing material temperature reaches 130 DEG C,
Carrying stone roller 5 seconds, adjustment rotor speed is 30rpm, and pressure is kneaded 90 seconds, and sizing material temperature is 150 DEG C, and dumping obtains two-stage mixing glue,
Two-stage mixing glue is cooled to room temperature in air.
Three-stage mixing：Closed-smelting machine rotor rotating speed 35rpm, pressure pressure 0.6MPa, by two-stage mixing glue, accelerating agent (CBS
And DPG) and sulphur input internal mixer mixing chamber, it is kneaded 60 seconds, carries stone roller 10 seconds, pressure is kneaded 50 seconds, and sizing material temperature is 85 DEG C, is arranged
Glue obtains vulcanizate.
Physical mechanical property：
Test condition：The physical mechanical property of vulcanizate is tested according to corresponding ASTM standard, using XLL-250
Type universal testing machine (LLOYD instrument companies of Britain product) is tested, and table 3 is as a result summarized in.
Table 3
| Rice hull ash sample | White carbon sample | Rubber tensile intensity |
| Embodiment 1 | White carbon sample 1 | 17.6 |
| Embodiment 2 | White carbon sample 2 | 18.8 |
| Embodiment 3 | White carbon sample 3 | 17.8 |
| Embodiment 4 | White carbon sample 4 | 16.2 |
| Embodiment 5 | White carbon sample 5 | 14.3 |
| Embodiment 6 | White carbon sample 6 | 15.6 |
As can be seen from the above table, being prepared within the scope of the present invention in relation to the state modulator during combusting rice hull
The high structure white carbon black product of high dispersive can make rubber have higher tensile strength, with quartz sand be raw material be prepared it is white
Carbon black products application performance is identical.Therefore, the rice hull ash being prepared using the preparation method of the present invention, and use the rice husk
The white carbon black product that ash is further prepared can make rubber have excellent tensile strength, it might even be possible to be with quartz sand
White carbon prepared by raw material has same or similar application performance.
It should be appreciated that protection scope of the present invention is not limited to above example.Those skilled in the art can root
Examples detailed above and specific implementation mode are changed according to present disclosure or modification, to reach the purpose of the present invention.
Such change and modification should all be covered in the protection domain that the application claim limits.
Claims (10)
1. a kind of preparation method of rice hull ash, including combusting rice hull is obtained into rice hull ash, wherein rice husk is in aerobic wind and anoxic wind
In the presence of burn, within the unit interval, rice husk burns under the ratio of controlled aerobic wind volume and anoxic wind volume, and/or
Blast amount (m of the rice husk in controlled anoxic wind3) burn under the ratio of the quality (t) of rice husk.
2. preparation method as described in claim 1, wherein in the unit interval, the controlled aerobic wind volume and anoxic wind body
Product is than referring to adjusting the ratio of aerobic wind volume and anoxic wind volume, such as make aerobic wind volume and anoxic wind body in the unit interval
Product is than being more than 5.1:1, such as 5.5:1 or more, such as 6:1-10:1 or 6:1-8:1.
3. preparation method as claimed in claim 1 or 2, wherein in the unit interval, the amount of the blasting (m of the controlled anoxic wind3)
With the ratio of the quality (t) of rice husk, such as in the unit interval anoxic wind the amount of blasting (m3) with the ratio of the quality (t) of rice husk be
600:1 or more, such as 600:1-1000:1, such as 650:1-900:1.
4. preparation method as described in any one of claims 1-3, the aerobic bellows chamber includes the use that boiler is passed through in the unit interval
In the hot-air after the pre-heat treatment for being passed through boiler in the air and unit interval for blast fuel.
5. preparation method according to any one of claims 1-4, wherein the oxygen content of the anoxic wind is less than aerobic wind, such as
Less than 10 volume %, such as less than 5 volume %, such as 3-5 volume %, the example can be the tail gas after combusting rice hull；
Preferably, the temperature of anoxic wind is 100-200 DEG C；Or
Preferably, anoxic wind undergoes the process of purification, heat exchange before blasting boiler；Or
Preferably, the oxygen content in the aerobic wind can be 10 volume % or more, such as 15 volume % or more, for example, about 20 bodies
Product about 25 volume % of %-, the example can be air；Or
Preferably, the aerobic wind and anoxic wind blast boiler simultaneously through different channels.
6. preparation method as described in any one in claim 1-5, wherein the rice hull ash is prepared via a method which：
B1) by rice husk merging boiler combustion zone burning, rice hull ash initial material is obtained；
B2) by step b1) by screening, rice hull ash is obtained after removing impurity obtained rice hull ash initial material.
7. preparation method as claimed in any one of claims 1 to 6, the wherein temperature of boiler combustion zone can be in such as 600-900
DEG C, such as 600-800 DEG C, 600-700 DEG C；Residence time of the rice husk in burner hearth can be 10-60min, such as 10-30min, such as
15-20min。
8. such as claim 1-7 any one of them preparation methods, the rice hull ash that wherein combusting rice hull obtains also further across
Screening；Preferably, the screening can be carried out by 1-5mm (such as 2mm) straight line shaker；
Preferably, the rice hull ash after the screening goes out the different organic matter of proportion under the conditions of negative pressure transportation by inertial separation again
Impurity.
9. such as the obtained rice hull ash of claim 1-8 any one of them preparation methods；
Preferably, the phosphorus content of the rice husk ash products can be about 10-40 weight %, for example, about 15-30 weight %, such as from about
15-25 weight %.
10. the white carbon that rice hull ash as claimed in claim 9 is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810242645.4A CN108483450B (en) | 2018-03-22 | 2018-03-22 | Preparation method of biomass white carbon black raw material rice hull ash |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107192A (en) * | 1986-10-12 | 1988-05-11 | 合肥联合大学 | Use industrialized production method for white carbon black from rice husk |
| RU2144498C1 (en) * | 1999-02-01 | 2000-01-20 | Земнухова Людмила Алексеевна | Method of preparing highly pure amorphous silicon dioxide and carbon from rice husk |
| CN102079525A (en) * | 2010-12-14 | 2011-06-01 | 广东石油化工学院 | Method for preparing white carbon black by taking rice hull ash as raw material |
| CN103695014A (en) * | 2013-12-11 | 2014-04-02 | 吉林大学 | Method for preparing methyl alcohol biomass oil through rice husk |
| CN106348305A (en) * | 2016-08-31 | 2017-01-25 | 长春工业大学 | Method for preparing spherical silicon dioxide from rice hull ash |
| CN106829970A (en) * | 2017-03-31 | 2017-06-13 | 章斐虹 | A kind of method that rice husk prepares biomass nano silica |
-
2018
- 2018-03-22 CN CN201810242645.4A patent/CN108483450B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107192A (en) * | 1986-10-12 | 1988-05-11 | 合肥联合大学 | Use industrialized production method for white carbon black from rice husk |
| RU2144498C1 (en) * | 1999-02-01 | 2000-01-20 | Земнухова Людмила Алексеевна | Method of preparing highly pure amorphous silicon dioxide and carbon from rice husk |
| CN102079525A (en) * | 2010-12-14 | 2011-06-01 | 广东石油化工学院 | Method for preparing white carbon black by taking rice hull ash as raw material |
| CN103695014A (en) * | 2013-12-11 | 2014-04-02 | 吉林大学 | Method for preparing methyl alcohol biomass oil through rice husk |
| CN106348305A (en) * | 2016-08-31 | 2017-01-25 | 长春工业大学 | Method for preparing spherical silicon dioxide from rice hull ash |
| CN106829970A (en) * | 2017-03-31 | 2017-06-13 | 章斐虹 | A kind of method that rice husk prepares biomass nano silica |
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