CN104418376B - A kind of production technology of winnofil - Google Patents
A kind of production technology of winnofil Download PDFInfo
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- CN104418376B CN104418376B CN201310394906.1A CN201310394906A CN104418376B CN 104418376 B CN104418376 B CN 104418376B CN 201310394906 A CN201310394906 A CN 201310394906A CN 104418376 B CN104418376 B CN 104418376B
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- carbon dioxide
- winnofil
- quick lime
- digestion reaction
- reaction
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
Abstract
The present invention proposes the production technology of a kind of winnofil, including: the carbon dioxide produced during limestone calcination is removed, chaotropic agent is added before digestion reaction, dispersant is added during digestion reaction, carry out digestion reaction with quick lime and water and prepare slaked lime, supplement carbon dioxide during slaked lime carburizing reagent, reclaim and obtain product.The production technology of winnofil of the present invention, the problem that in production process, reaction rate is relatively slow, energy consumption is bigger is solved by controlling the concentration of carbon dioxide in production process, improve the production efficiency of winnofil, reduce energy consumption, save production cost, it is easy to accomplish industrialized production.
Description
Technical field
The present invention relates to the production technology of winnofil, particularly relate to a kind of by controlling carbon dioxide
Concentration improves reaction rate, reduces the production technology of the winnofil of energy consumption of reaction.
Background technology
Winnofil is a kind of critically important inorganic chemical product, and tool has been widely used, and such as it is by extensively
Generally as the functional filler of material, such as pigment, papermaking, coating, ink, plastics or sealant etc..
Other application of winnofil are included in the industry such as food, cosmetics and medicine.
The classical production technology feature description of winnofil is as follows: limestone divides through calcining furnace calcination reaction
Solution becomes quick lime and carbon dioxide；Quick lime obtains slaked lime through water digestion reaction, i.e. calcium hydroxide
Emulsion；Carbon dioxide and slaked lime are carried out carburizing reagent under certain control condition and must precipitate carbonic acid
Calcium.The winnofil produced through being dehydrated, be dried, pulverize and packaging becomes finished product winnofil.
Above-mentioned relevant chemical equation is:
Limestone calcination reaction CaCO3→CaO+CO2
Quicklime slaking reaction CaO+H2O→Ca(OH)2
Slaked lime carburizing reagent Ca (OH)2+CO2→CaCO3+H2O
Wherein, in actual production, calcining furnace height is higher, may be up to 25 meters, how to control calcining furnace
Reaction rate is problems faced during winnofil produces.Have at present and temperature sensor is set in calcining furnace
Measure solve the problems referred to above, according to temperature sensor transmission temperature data control aerator power,
This method also can on certain extent control reaction rate, but installation difficulty is relatively big, cost is the highest.
In the carbonisation of slaked lime, the carbon dioxide produced in calcining furnace is passed through through washing and compression
In carbonators, because the slaked lime that first carburizing reagent is dissolved in water generates carbonic acid with carbon dioxide
Calcium, then solid phase adds to rapidly make to be swift in response in liquid phase go on.But in process of production, due to
Ca(OH)2Having the least dissolubility in water, carburizing reagent speed is slow, needs to use powerful aerator
Constantly toward transport of carbon dioxide in carbonators, this is whole winnofil energy consumption the best part, consumes
The substantial amounts of energy.Above-mentioned factor causes whole winnofil production process relatively slow, relatively costly.
Summary of the invention
The present invention proposes the production technology of a kind of winnofil, solves in prior art anti-in production process
Answer speed relatively slow, the problem that energy consumption is bigger.
The invention provides the production technology of a kind of winnofil, comprise the following steps:
1) being loaded by limestone in calcining furnace and calcine, blast rate is 3.0～7.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 5%～10%, obtains quick lime；
2) step 1) gained quick lime is carried out digestion reaction in digester, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent in carbonators, and blast rate is 5.0～9.0
m3/ h, the density of carbon dioxide gas controlled in carbonators is 20%～80%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
Preferably, the chaotropic agent of 0.3%～the 2.4% of addition quick lime weight ratio before digestion reaction starts；Digestion
Reaction adds the dispersant of 0.5%～the 3% of quick lime weight ratio after starting 10min.
Preferably, the chaotropic agent of 1.2%～the 2.0% of addition quick lime weight ratio before digestion reaction starts；Digestion
Reaction adds the dispersant of 1.5%～the 2.5% of quick lime weight ratio after starting 10min.
Preferably, at least one during chaotropic agent is sorbitol, ethylene glycol heteroside, mannitol, glycerol；
Dispersant is acrylic acid, methacrylic acid, itaconic acid, maleic acid, 2-(Acryloyloxy)ethanol, methacrylic acid
At least one in hydroxypropyl acrylate, ammonium acetate, ammonium formate.
Preferably, in step 1) in, exist from calcination reaction first stage turning to calcination reaction second stage
Becoming, the feature of transformation is the speed decline that reactant mixture produces carbon dioxide, wherein, the two of generation
80%～the 90% of stoichiometric total amount of carbon oxide gas removes in the first phase, and remainder is
Two-stage removes.
Preferably, in step 3) in, exist from carburizing reagent first stage turning to carburizing reagent second stage
Becoming, the feature of transformation is that the speed of reactant mixture absorbing carbon dioxide gas declines, wherein, and carbon dioxide
70%～the 80% of stoichiometric total amount of gas disperses in the first phase, and remainder is in second stage
Middle dispersion.
Preferably, in step 3) in the carburizing reagent first stage, carbon dioxide is can be mixed by reaction
The maximum rate dispersion that thing absorbs.
Preferably, in step 3) in carburizing reagent second stage, carbon dioxide is can be mixed by reaction
The maximum rate dispersion that thing absorbs, in carburizing reagent second stage, the dispersion rate of carbon dioxide is less than carbon
Change the dispersion rate of carbon dioxide in the reaction first stage.
Preferably, the pH value of product mixtures is at least 10.0.
According to the feature of reaction involved by the production technology of winnofil, in the calcination reaction first stage, produce
The speed of raw carbon dioxide is relatively fast, adjusts relatively fast blast rate and enters to remove carbon dioxide
And gas concentration lwevel is at reduced levels in controlling calcining furnace.By the particular point in time depending on reaction condition it
After, the calcination reaction first stage changes to calcination reaction second stage, mixed in the reaction of calcination reaction second stage
Compound produces the maximum rate of carbon dioxide and produces carbon dioxide less than the calcination reaction first stage
Maximum rate.Condition is asked, during the transformation in above-mentioned two stage, due to carbon dioxide gas according to reaction
Body produces the reduction of speed, and calcining in-furnace temperature may relative constancy.
In a preferred embodiment of the invention, in carbonation reaction, first stage carbon dioxide is divided
The speed being scattered in reactant mixture is maximum rate, can be absorbed at above-mentioned speed carbon dioxide gas,
So seldom discharge from reactant mixture even without carbon dioxide, and then by carburizing reagent
Time necessary to one stage shortens to minimum, thus improves the throughput rate of whole process.
In like manner, carburizing reagent second stage also preferably uses the maximum dioxy that can be absorbed by reactant mixture
Changing carbon dispersion rate to carry out, the most above-mentioned stage has the formation of slaked lime solution state.Generally carbon
Change the reaction second stage speed first stage to be less than.
Preferably, for guaranteeing that the excess of carbon dioxide causes the decline of winnofil yield, control to produce
The pH value of thing mixture, its size is at least 10.0.
When digestion reaction, in sorbitol, ethylene glycol heteroside, mannitol or glycerol, at least one deposits
Under, it is possible to making the calcium ion being dissolved in reaction system increase, the amount of addition is the most, the calcium ion of dissolving
Amount increases the most.During digestion reaction, acrylic acid, methacrylic acid, itaconic acid, maleic acid, third
In olefin(e) acid hydroxyl ethyl ester, Hydroxypropyl methacrylate, ammonium acetate or ammonium formate in the presence of at least one, it is possible to
Accelerate the dispersion rate of reactant, the in addition adjustment of reaction system stir speed (S.S.) and the control of blast rate, all
The dispersion rate of carbon dioxide can be improved, and then improve throughput rate.
The production technology of a kind of winnofil of the present invention, begins to be controlled from limestone calcination
Density of carbon dioxide gas, quicklime slaking reaction before addition chaotropic agent sorbitol, ethylene glycol heteroside,
Mannitol or glycerol, during digestion reaction add dispersant acrylic acid, methacrylic acid, itaconic acid,
Maleic acid, 2-(Acryloyloxy)ethanol, Hydroxypropyl methacrylate, ammonium acetate or ammonium formate, produced by control
During the concentration of carbon dioxide improve the carbonation rate of the decomposition rate of limestone, slaked lime, solve
The problem that in production process winnofil reaction rate is slow, energy consumption is high, can be real with conventional equipment
Now produce, production cost reduce, simple to operate, it is easy to accomplish industrialized production, can promote industrialization should
With.
Accompanying drawing explanation
Fig. 1 is the production technological process of a kind of winnofil of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Embodiment 1:
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 5.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 8%, obtains quick lime；
2) step 1) gained quick lime is carried out digestion reaction in digester, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent in carbonators, and blast rate is 7.0m3/ h,
The density of carbon dioxide gas controlled in carbonators is 50%, keeps the pH value of product mixtures to be at least 9.5；
And
4) winnofil is reclaimed.
The time-consuming 3.5h of calcination reaction in production process, the time-consuming 3.2h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 25%, thus drops
Low energy consumption.
Embodiment 2
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 5.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 8%, carbon dioxide stoichiometric always
The 80% of amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The sorbitol of the 0.3% of quick lime weight ratio；Digestion reaction adds the 0.5% of quick lime weight after starting 10min
Acrylic acid, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 70% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 7.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 50%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 3.5h of calcination reaction in production process, the time-consuming 2.8h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 25%, thus drops
Low energy consumption.
Embodiment 3
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 5.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 8%, carbon dioxide stoichiometric always
The 90% of amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The Glycol glycoside of the 2.4% of quick lime weight ratio；Digestion reaction adds quick lime weight after starting 10min
The itaconic acid of 3%, obtains slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 80% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 7.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 50%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 3.5h of calcination reaction in production process, the time-consuming 2.7h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 25%, thus drops
Low energy consumption.
Embodiment 4
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 5.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 8%, carbon dioxide stoichiometric always
The 80% of amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The glycerol of the 1.2% of quick lime weight ratio；Digestion reaction adds the 2.5% of quick lime weight after starting 10min
Maleic acid, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 70% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 7.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 50%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 3.5h of calcination reaction in production process, the time-consuming 2.5h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 30%, thus drops
Low energy consumption.
Embodiment 5
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 5.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 8%, carbon dioxide stoichiometric always
The 90% of amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The mannitol of the 2.0% of quick lime weight ratio；Digestion reaction adds the 1.5% of quick lime weight after starting 10min
Ammonium acetate, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 70% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 7.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 50%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 3.5h of calcination reaction in production process, the time-consuming 2.4h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 30%, thus drops
Low energy consumption.
Embodiment 6
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 3.0m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 10%, carbon dioxide stoichiometric
The 80% of total amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The sorbitol of the 0.3% of quick lime weight ratio；Digestion reaction adds the 0.5% of quick lime weight after starting 10min
Methacrylic acid, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 70% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 5.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 20%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 4.0h of calcination reaction in production process, the time-consuming 2.2h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 30%, thus drops
Low energy consumption.
Embodiment 7
1) 6 tons of limestone loading calcining in calcining furnace, blast rate is 7.5m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 5%, carbon dioxide stoichiometric always
The 80% of amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The sorbitol of the 1.5% of quick lime weight ratio；Digestion reaction adds the 2.5% of quick lime weight after starting 10min
2-(Acryloyloxy)ethanol, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 80% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 9.0m3/ h, the density of carbon dioxide gas controlled in carbonators is 80%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed.
The time-consuming 3.0h of calcination reaction in production process, the time-consuming 2.0h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 35%, thus drops
Low energy consumption.
Embodiment 8
1) 8 tons of limestone loading calcining in calcining furnace, blast rate is 7.0m3/ h, removes carbon dioxide
Gas, the density of carbon dioxide gas controlled in calcining furnace is 10%, carbon dioxide stoichiometric
The 90% of total amount removes in the first phase, and remainder removes in second stage, obtains quick lime；
2) step 1) gained quick lime being carried out in digester digestion reaction, digestion reaction starts front addition
The glycol glucoside of the 2.0% of quick lime weight ratio；Digestion reaction adds quick lime weight after starting 10min
1.5% ammonium formate, obtain slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent, the chemistry of carbon dioxide in carbonators
The 70% of the total amount of equivalent disperses in the first phase, and remainder disperses in second stage, blast rate
For 8.5m3/ h, the density of carbon dioxide gas controlled in carbonators is 75%, keeps the pH of product mixtures
Value at least 10.0；And
4) winnofil is reclaimed.
The time-consuming 3.0h of calcination reaction in production process, the time-consuming 2.2h of carburizing reagent, relative to not controlling titanium dioxide
The time of the classical production technology that carbon gas concentration, remaining reaction condition are identical shortens about 35%, thus drops
Low energy consumption.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (4)
1. the production technology of a winnofil, it is characterised in that: comprise the following steps,
1) being loaded by limestone in calcining furnace and calcine, blast rate is 3.0～7.5m3/ h, removes the two of generation
Carbon oxide gas, the density of carbon dioxide gas controlled in calcining furnace is 5%～10%, obtains quick lime；
2) by step 1) gained quick lime carries out digestion reaction in digester, obtains slaked lime；
3) by step 2) gained slaked lime carries out carburizing reagent in carbonators, and blast rate is 5.0～9.0
m3/ h, the density of carbon dioxide gas controlled in carbonators is 20%～80%, keeps the pH of product mixtures
Value at least 9.5；And
4) winnofil is reclaimed；
Described digestion reaction adds the chaotropic agent of 0.3%～the 2.4% of quick lime weight ratio before starting；Described digestion
Reaction adds the dispersant of 0.5%～the 3% of quick lime weight ratio after starting 10min；
Described chaotropic agent is at least one in sorbitol, mannitol or glycerol；Described dispersant is propylene
Acid, methacrylic acid, itaconic acid, maleic acid, 2-(Acryloyloxy)ethanol, Hydroxypropyl methacrylate, acetic acid
At least one in ammonium or ammonium formate.
The production technology of a kind of winnofil the most according to claim 1, it is characterised in that described
Digestion reaction adds the chaotropic agent of 1.2%～the 2.0% of quick lime weight ratio before starting；Described digestion reaction starts
The dispersant of 1.5%～the 2.5% of addition quick lime weight ratio after 10min.
The production technology of a kind of winnofil the most according to claim 1, it is characterised in that in step
Rapid 1), in, exist from the calcination reaction first stage to the transformation of calcination reaction second stage, the spy of described transformation
Levy be reactant mixture produce carbon dioxide speed decline, wherein, the carbon dioxide of generation
80%～the 90% of the total amount of equivalent removes in the first phase, and remainder removes in second stage.
The production technology of a kind of winnofil the most according to claim 1, it is characterised in that described product
The pH value of thing mixture is at least 10.0.
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| CN109467113A (en) * | 2019-01-16 | 2019-03-15 | 连平县鑫福建材有限公司 | A kind of production technology of calcium carbonate powder |
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| CN109133137B (en) * | 2018-11-14 | 2020-12-08 | 上海应用技术大学 | Ellipsoidal micro-nano calcium carbonate and preparation method thereof |
| CN114276698B (en) * | 2021-12-30 | 2023-04-07 | 广西华纳新材料股份有限公司 | Preparation method of nano calcium carbonate for nail-free glue |
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| CN102674425A (en) * | 2012-05-19 | 2012-09-19 | 祁阳建明化工有限责任公司 | Production technique of nano calcium carbonate by normal temperature method |
| CN102757074A (en) * | 2011-04-25 | 2012-10-31 | 琳德股份公司 | Method and system for preparing precipitate calcium carbonate |
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| GB0917248D0 (en) * | 2009-10-02 | 2009-11-18 | Calcitech Synthetic Minerals Ltd | Production of calcium carbonate |
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| CN102757074A (en) * | 2011-04-25 | 2012-10-31 | 琳德股份公司 | Method and system for preparing precipitate calcium carbonate |
| CN102674425A (en) * | 2012-05-19 | 2012-09-19 | 祁阳建明化工有限责任公司 | Production technique of nano calcium carbonate by normal temperature method |
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| CN109467113A (en) * | 2019-01-16 | 2019-03-15 | 连平县鑫福建材有限公司 | A kind of production technology of calcium carbonate powder |
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