CN1651520A - Method of performing powder modification and its device - Google Patents
Method of performing powder modification and its device Download PDFInfo
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- CN1651520A CN1651520A CN 200410081450 CN200410081450A CN1651520A CN 1651520 A CN1651520 A CN 1651520A CN 200410081450 CN200410081450 CN 200410081450 CN 200410081450 A CN200410081450 A CN 200410081450A CN 1651520 A CN1651520 A CN 1651520A
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Abstract
A process for modifying powdered material includes such steps as segmentally spraying the modifier onto the powdered material for uniform mixing, and heating the mixture for activating it. Its apparatus is composed of feeder with nozzles, mixer with at least one nozzles and activating unit with heater on its casing.
Description
[technical field]
The present invention relates to the dispersing depolymerization that mixes of powder, be specifically related to a kind of powder-modified method and apparatus.
[background technology]
Powder body material must at first be handled through modification in being applied to macromolecular materials such as rubber, plastics the time.The method that modification is handled can be divided into dry method and wet method two big classes, and wherein is most common form with the dry method.Dry method modification is exactly (moisture generally≤0.5%) suitable chemical assistant of adding in the exsiccant powder, in specific device, handle, under certain process conditions (temperature, time) can obtain modified powder, and the technical indicator of modified powder first is a degree of activation, requires＞95%; The secondth, check to have or not the particulate state coacervate.The technology of dry method modification mainly is at the common powder below 2500 orders with device at present both at home and abroad, still is not applicable to superfine powder, the particularly modification technology and the device of the above superfine powder of 6000 orders so far.
Common powder is because grain graininess is thick, and surface energy is little, itself dispersed all right, thereby under the mechanically mixing of certain intensity, just can with surface-modifying agent generation uniform mixing, its powder granule is wrapped up by surface-modifying agent and finishes the modification processing.
Handle common powder-modified used device, have two kinds at present, a kind of is high speed kneader (be also referred to as high mixer, height stirs machine), and this is that the powder dry method modification is the most commonly used both at home and abroad at present, also is the most sophisticated a kind of.For example: French OMYA company carries out powder-modified with this device exactly.The high speed kneader is a kind of powder dry method modification device of intermittent type operation, thereby can only be used for the stearic acid parcel to common powder, and is difficult to be applicable to coupling agent modified.Its principle of work is with in powder and the disposable activating apparatus of packing into of properties-correcting agent, the activating apparatus volume does not wait from several liters to hundreds of liter, the container of activating apparatus axially on two groups of stir shafts are arranged, high speed rotating under driven by motor, stir powder, make that powder and properties-correcting agent are disposable to feed intake, batch production, output is controlled by vessel volume.Its shortcoming is that mixture strength is not enough, because in the space of sealing, difficult control of temperature, labour intensity is big, and dust pollution is heavier.For superfine powder, because its surface energy is big, thereby the poly-group of powder is difficult to disperse.
Another kind is the nearly 2 years three cylinder high-speed mixers that just occurred, basically form by three activating apparatus that form cylindrical tube outward, its principle of work is that three cylindrical tube axially parallel ground are arranged by serpentine, each inner barrel is upwards arranged in drum shaft rotor and stator, high speed rotating under driven by motor makes powder and properties-correcting agent thorough mixing.Be characterized in the continuous dosing continuous production, stirring intensity is big, and shortcoming is owing to there is not heating unit and the material residence time in equipment very short, thereby temperature is difficult to reach coupling agent and reacts needed temperature.For superfine powder, though its stirring intensity is bigger, because the residence time is short, thereby final stirring and mixing effect is still relatively poor.
[summary of the invention]
Purpose of the present invention is intended to overcome above-mentioned the deficiencies in the prior art, propose a kind of can continuous dosing continuous production, both be suitable for common powder and superfine powder modification, also be suitable for dissimilar coupling agent modified and modified effects good powder-modified method and device.
The technical scheme that realizes above-mentioned purpose is: a kind of method that powder is carried out modification comprises:
1) with powder-modified blended step and the activatory step of being divided into;
2) described blended step is meant at material and properties-correcting agent and carries out in the blended process properties-correcting agent segmentation being sprayed into, and is beneficial to the thorough mixing of material and properties-correcting agent;
3) in blended step and/or activatory step process, to heat material in mixing and properties-correcting agent simultaneously, be used to satisfy the reaction conditions of different powders and properties-correcting agent, improve the effect of mixing and/or modification.
Also comprise the step of premix before the described blended step, the step of described premix is meant in the process of convey materials just mixes with material partially modified dose.Described Heating temperature is 50 ~ 160 degree, and described activatory step is meant under 1800 ~ 3000 rev/mins, temperature are 120-220 ℃ condition carries out high-speed stirring.
A kind of device that powder is carried out modification, comprise feeder, blender and activating apparatus, described feeder, blender and activating apparatus are equipped with opening for feed and discharge port, the feeder discharge port is connected with the blender opening for feed, the blender discharge port is connected with the activating apparatus opening for feed, described feeder is provided with nozzle, can in the process of convey materials, partially modified dose be mixed with material, described blender is provided with at least one nozzle between its opening for feed and discharge port, can the material spray in blender add properties-correcting agent by nozzle, mix by blender, described feeder, blender, activating apparatus housing one of at least therein is provided with heating unit, is used for wherein material is heated.
Described heating unit is the heating jacket of the double-wall structure on the housing, wherein is filled with thermal oil, can heat the material in the housing by the heat passage of thermal oil.
Described blender is equipped with nozzle at the end of its front end near opening for feed, middle part, close discharge port.
Described activating apparatus is made of two-stage at least, activating apparatus at different levels are equipped with opening for feed and discharge port and connection in turn, described blender discharge port is connected with one-level activating apparatus opening for feed, and described activating apparatus at different levels can mix material wherein.
Also comprise the secondary blender, it is provided with opening for feed and discharge port, its opening for feed is connected with one-level activating apparatus discharge port, its discharge port is connected with secondary activating apparatus opening for feed, described secondary blender can mix material wherein, and between its opening for feed and discharge port, be provided with at least one nozzle, can add properties-correcting agent to material spray wherein.
Adopt technique scheme, beneficial technical effects of the present invention is: 1) with powder-modified blended step and the activatory step of being divided into, by the blended step is set separately, make it can mix evenly before activation.2) the properties-correcting agent segmentation is sprayed into, more help the thorough mixing of material and properties-correcting agent.3) by material and properties-correcting agent in mixing are heated, can fully satisfy the reaction conditions of different powders and properties-correcting agent, improve the effect of mixing and/or modification.4) increase is provided with blender before activating apparatus at different levels, material is carried out premix, feasible mixing is more even, and a plurality of blenders can be set, in different mixing and/or activation step, add dissimilar properties-correcting agent, in successive technology, finish composite modified effect to reach, overcome the shortcoming that the existing installation single job can only be thrown in a kind of properties-correcting agent.5) a plurality of nozzles are set in feeder opening for feed and blender, make properties-correcting agent contact with powder, mix more even with the form of repeatedly spraying.6) each the parts shell in the material process is provided with heating jacket, can realize the reaction conditions of powder and properties-correcting agent is fully satisfied in the temperature control of material in each flow process, improves modified effect.7) structure of the multistage activating apparatus of employing, be convenient to precise temp control to each stage of modifying process, prolonged the residence time of material in equipment, and because material and properties-correcting agent are not disposable addings, can the continuous discharging of continuously feeding, modifying process is continuously rapidly and efficiently and the modification result is good.
[description of drawings]
Fig. 1 is a kind of apparatus structure synoptic diagram that powder is carried out modification.
[embodiment]
Below by embodiment also in conjunction with the accompanying drawings, the present invention is described in further detail:
A kind of method that powder is carried out modification comprises: 1) with powder-modified step, blended step and the activatory step that is divided into premix.2) premix is meant that in convey materials properties-correcting agent and material with about 60% carry out pre-mixing, and premixed Heating temperature is 50 ~ 160 degree.3) mixing is to enter a blender again through the material that just mixes, main shaft high speed rotating in blender (180 ~ 1200 rev/mins), the blade that drives on the axle is implemented strong shear-mixed to material, and pass through heating and material from the friction effect, temperature is risen to about 120 ℃, by the nozzle of being located at blender front end, middle part and terminal three atomizers the properties-correcting agent segmentation is sprayed into again, the pulsed metering sprays into properties-correcting agent, realizes material and has guaranteed that mixing is even as much as possible repeatedly mixing of properties-correcting agent.4) activation is divided into three grades of activation, first step activation is to make material be suspended state with being under 1800 ~ 2600 rev/mins the powerful shear-mixed of high speed at rotating speed through the mixed material of step 3), thorough mixing, the ultrafine powder cluster of grains is torn apart simultaneously, temperature further rises, can remain between 120-220 ℃ according to the actual process condition, this temperature is suitable for all properties-correcting agent; Second stage activation is that will to enter a rotating speed through the powder of one-level activation modification again be to stir in 1800 ~ 2600 rev/mins, the activating apparatus of temperature between 120-220 ℃, is further torn depolymerization and the surface is not stained with the particle of properties-correcting agent and fully contacts, mixes with properties-correcting agent with aforementioned; Third stage activation is that will to enter a rotating speed through the powder of one-level activation modification again be to stir in 2200-3000 rev/min, the activating apparatus of temperature between 120-220 ℃, thoroughly eliminates the particulate agglomeration, makes finished product.
As required, can between first step activation and second stage activation step, the step of mixing identical or different properties-correcting agent be set.
Realize above-mentioned powder being carried out the device of the method for modification, as shown in Figure 1, comprise feeder 1, blender 2, secondary blender 3, one-level activating apparatus 4, secondary activating apparatus 5, three grades of activating apparatus 6.Described each parts are equipped with opening for feed and discharge port, are equipped with heating jacket 7 on each part case, and described heating jacket 7 is the double-wall structures on the housing, wherein is filled with thermal oil, can heat the material in the housing by the heat passage of thermal oil.Position near opening for feed on the feeder 1 is provided with nozzle 19, can in the process of convey materials, partially modified dose be mixed with material, the discharge port 8 of feeder 1 is connected with blender opening for feed 9, the discharge port 10 of blender 2 is connected with the opening for feed 11 of one-level activating apparatus, described blender 2 is equipped with nozzle 19 at the middle part of its front end near opening for feed 9, blender 2, the end of close discharge port 10, can add properties-correcting agent to material spray wherein.One-level activating apparatus discharge port 12 is connected with secondary blender opening for feed 13, secondary blender discharge port 14 is connected with secondary activating apparatus opening for feed 15, described secondary blender 3 is equipped with nozzle 19 at the middle part of its front end near opening for feed 13, secondary blender, the end of close discharge port 14, can add properties-correcting agent to material spray wherein.Secondary activating apparatus discharge port 16 is connected with three grades of activating apparatus opening for feeds 17, and three grades of activating apparatus discharge ports 18 are the finished product discharge port of modified powder.
Be provided with volution in the feeder and carry reamer, be used to transmit the material of input.Be provided with live spindle in each blender and the activating apparatus, have blade on the axle, be used for wherein material is mixed by driven by motor.The logical charge tube of each charging and discharging mouth that links to each other is communicated with.
Concrete working process: 1. material is entered by the opening for feed of feeder 1, the atomizer that properties-correcting agent is housed is opened, properties-correcting agent is sprayed in the feeder by the nozzle metering, under heating heat-conducting oil (temperature is 50 ~ 160 degree), material and properties-correcting agent realize that through carrying reamer material mixes (premix) with the first time of properties-correcting agent.
2. the logical charge tube of material through premix enters blender 2, the main shaft high speed rotating of blender 2 (180 ~ 1200 rev/mins), the blade that drives on the axle is implemented strong shear-mixed to material, and because heating heat-conducting oil and material are from the friction effect, temperature rises to about 120 ℃, be located at blender front end, middle part and three terminal nozzles that connect the properties-correcting agent atomizer, the pulsed metering sprays into properties-correcting agent, realizes material and has guaranteed that mixing is even as much as possible repeatedly mixing of properties-correcting agent.
3. treated good material enters one-level activating apparatus 4 (rotating speed is 1800 ~ 2600 rev/mins), material is suspended state under the powerful shear-mixed of high speed, thorough mixing, the ultrafine powder cluster of grains is torn apart simultaneously, temperature further rises, and can remain between 120-220 ℃ according to the actual process condition, and this temperature is suitable for all properties-correcting agent, after the one-level modification, degree of activation index＞60% of material.
4. the logical charge tube of powder through the one-level modification enters secondary blender 3, be located at its front end, middle part and three terminal nozzles that connect the properties-correcting agent atomizer and can spray into the properties-correcting agent of second class or the properties-correcting agent same with aforementioned modifiers, material enters secondary activating apparatus 5 (rotating speed is 1800 ~ 2600 rev/mins) subsequently, stirs between 120-220 ℃ then.Further torn depolymerization and particle that the surface is not stained with properties-correcting agent fully contacts, mixes with properties-correcting agent with aforementioned, after the secondary modification, degree of activation index＞90% of material.
5. the logical charge tube of powder through the secondary modification enters further reaction of three grades of activating apparatus 6 (rotating speed is 2200-3000 rev/min), thoroughly eliminate the particulate agglomeration simultaneously, through this operation, the degree of activation of material is with＞95%, flowability also is improved, and finally becomes finished product.
The main frame that material improves step by step through one-level to three grade rotating speed in said process, the shearing force that is subjected to is progressively strengthened, and agglomerating particles also diminishes gradually.In modifying process, the temperature range of each equipment is determined by the type of coupling agent, can realize the adjustment of temperature by the control to heating jacket.
Modification experiment: get the heavy calcium carbonate powder of 6000 orders (2 μ＞90%), 120 kg, moisture≤0.3%, and titanate coupling agent (Nanjing dawn chemical plant ND131 or NDZ-131), add-on is 0.25% to carry out the modification experiment.At first equipment is heated up to the heat-conducting oil heating in the heating jacket, when temperature reaches 150 ℃, beginning drops into powder continuously by the opening for feed of feeder and is metered into coupling agent simultaneously and (adds 60% during the feeder charging, the blender front end adds 10%, the middle part adds 25%, and the rear end adds 5%), mixing through three grades of activating apparatus successively, after 7 minutes, modification is finished.By National Standard Method test degree of activation is 97%, and hand is touched the imperceptible any particle of powder.
Comparative Examples one: get with modification experiment in employed identical powder and properties-correcting agent; with SHR-300 type high speed kneader (manufacturing of Zhangjiagang Machinery Plant of Light Industry) modification; stirring 5 minutes temperature rises to 150 ℃ and becomes low speed; high low speed like this alternately; shut down discharging after keeping the fast state cumulative time to reach 20 minutes, amounting to modification time is 63 minutes.By National Standard Method test degree of activation is 70%, and hand is touched powder can feel more particle.
Comparative Examples two: get with modification experiment in employed identical powder and properties-correcting agent, with SYR3 type three cylinder high-speed mixers (four directions, Jiangsu machinofacture company limited makes) modification, to throw in the material that does not add coupling agent equipment is being heated up certainly under the friction state earlier, temperature reaches 105 ℃ after 50 minutes, beginning drops into powder continuously and is metered into coupling agent simultaneously, and post-modification was finished in 18 minutes.By National Standard Method test degree of activation is 52%, and hand is touched powder can feel a little particle.
Claims (10)
1, powder is carried out the method for modification, it is characterized in that:
1) with powder-modified blended step and the activatory step of being divided into;
2) described blended step is meant at material and properties-correcting agent and carries out in the blended process properties-correcting agent segmentation being sprayed into, and is beneficial to the thorough mixing of material and properties-correcting agent;
3) in blended step and/or activatory step process, to heat material in mixing and properties-correcting agent simultaneously, be used to satisfy the reaction conditions of different powders and properties-correcting agent, improve the effect of mixing and/or modification.
2, the method that powder is carried out modification according to claim 1 is characterized in that described blended step also comprises the step of premix before, and the step of described premix is meant in the process of convey materials just mixes with material partially modified dose.
3, the method that powder is carried out modification according to claim 2 is characterized in that described segmentation sprays into to be meant and to spray into an amount of properties-correcting agent respectively near the front end feed entrance of mixing container, the middle part of mixing container, the discharge port place, rear end of mixing container.
4, according to any described method of powder being carried out modification of claim 1-3, it is characterized in that: described Heating temperature is 50 ~ 160 degree, and described activatory step is meant under 1800 ~ 3000 rev/mins, temperature are 120-220 ℃ condition carries out high-speed stirring.
5, the method that powder is carried out modification according to claim 4 is characterized in that: the activatory step is at least two-stage or more than the two-stage, between the first step and the second stage step of mixing identical or different properties-correcting agent is set.
6, a kind of device that powder is carried out modification, comprise feeder and activating apparatus, it is characterized in that: also comprise blender, described feeder, blender and activating apparatus are equipped with opening for feed and discharge port, the feeder discharge port is connected with the blender opening for feed, the blender discharge port is connected with the activating apparatus opening for feed, described feeder is provided with nozzle, can in the process of convey materials, partially modified dose be mixed with material, described blender is provided with at least one nozzle between its opening for feed and discharge port, can the material spray in blender add properties-correcting agent by nozzle, mix by blender, described feeder, blender, activating apparatus housing one of at least therein is provided with heating unit, is used for wherein material is heated.
7, the device that powder is carried out modification according to claim 6, it is characterized in that: described heating unit is the heating jacket of the double-wall structure on the housing, wherein be filled with thermal oil, can heat the material in the housing by the heat passage of thermal oil.
8, the device that powder is carried out modification according to claim 6 is characterized in that: described blender is equipped with nozzle at the end of its front end near opening for feed, middle part, close discharge port.
9, according to any described device that powder is carried out modification of claim 6-8, it is characterized in that: described activating apparatus is made of two-stage at least, activating apparatus at different levels are equipped with opening for feed and discharge port and connection in turn, described blender discharge port is connected with one-level activating apparatus opening for feed, and described activating apparatus at different levels can mix material wherein.
10, the device that powder is carried out modification according to claim 9, it is characterized in that: also comprise the secondary blender, it is provided with opening for feed and discharge port, its opening for feed is connected with one-level activating apparatus discharge port, its discharge port is connected with secondary activating apparatus opening for feed, described secondary blender can mix material wherein, and is provided with at least one nozzle between its opening for feed and discharge port, can add properties-correcting agent to material spray wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410081450 CN1651520A (en) | 2004-12-07 | 2004-12-07 | Method of performing powder modification and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410081450 CN1651520A (en) | 2004-12-07 | 2004-12-07 | Method of performing powder modification and its device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610115844 Division CN1912017A (en) | 2004-12-07 | 2004-12-07 | Device for powder modification |
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| CN1651520A true CN1651520A (en) | 2005-08-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756365A (en) * | 2013-12-04 | 2014-04-30 | 芜湖卓越纳米新材料有限公司 | Surface treatment method for nanometer calcium carbonate |
| CN110819137A (en) * | 2019-11-25 | 2020-02-21 | 四川亿欣新材料有限公司 | Modification device and modification method for calcium-based powder special for adhesive |
| CN114405446A (en) * | 2022-01-29 | 2022-04-29 | 华东理工大学 | Continuous modification device and method for continuously modifying white carbon black |
-
2004
- 2004-12-07 CN CN 200410081450 patent/CN1651520A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756365A (en) * | 2013-12-04 | 2014-04-30 | 芜湖卓越纳米新材料有限公司 | Surface treatment method for nanometer calcium carbonate |
| CN110819137A (en) * | 2019-11-25 | 2020-02-21 | 四川亿欣新材料有限公司 | Modification device and modification method for calcium-based powder special for adhesive |
| CN110819137B (en) * | 2019-11-25 | 2021-06-18 | 四川亿欣新材料有限公司 | Modification device and modification method for calcium-based powder special for adhesive |
| CN114405446A (en) * | 2022-01-29 | 2022-04-29 | 华东理工大学 | Continuous modification device and method for continuously modifying white carbon black |
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