CN1203192A - Process for surface modification of calcium carbonate and talk - Google Patents
Process for surface modification of calcium carbonate and talk Download PDFInfo
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- CN1203192A CN1203192A CN 98110832 CN98110832A CN1203192A CN 1203192 A CN1203192 A CN 1203192A CN 98110832 CN98110832 CN 98110832 CN 98110832 A CN98110832 A CN 98110832A CN 1203192 A CN1203192 A CN 1203192A
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- surface modifying
- active agent
- modifying method
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- fine mill
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Abstract
A surficial modification process for calcium carbonate, or talc includes such steps as crushing calcium carbonate or talc as raw material, pulverization, pulping, wet ultrafine grinding, strong and quick drying, and collecting finished product, and features that addition of surfactant before drying for surficial modification and keeping the material in temp-raising state during ultrafine grinding. Its advantages are high activity and low cost of product, and simple and continuous process.
Description
The present invention relates to the surface treatment method of non-metallic minerals, be specifically related to the surface modifying method of lime carbonate, the ultra-fine goods of talcum.
In the past lime carbonate, talcous surface modifying method be after preparation lime carbonate, talcous ultra-fine process, insert separately a surface modification technology (after with drying powder pour into add in the high speed kneader tensio-active agent stir carry out).Whole operational path is: raw ore → fragmentation → grinding → slurrying → wet method super-fine mill stripping → drying → high speed is mediated (adding tensio-active agent) → goods.The shortcoming of this surface modifying method is; 1. the medicament coating is inhomogeneous, and activation rate is not high, generally has only 80～90%, and modified effect is bad; 2. owing to handle in the high speed kneader and can't carry out continuously, so processing power is low; Since above-mentioned surface modifying method need pinch the facility investment of machine at a high speed and heat, the energy consumption of equipment operation, therefore whole process cost is higher.
The purpose of this invention is to provide in a kind of wet method super-fine process lime carbonate, talcum surface modifying method that activation rate height, with low cost, method be simple, can carry out continuously.
For achieving the above object, the technical solution used in the present invention is: a kind of lime carbonate, steatitic surface modifying method, and adopting lime carbonate or talcum mineral is raw material, and successively raw material is carried out following processing:
(1). raw material is carried out fragmentation;
(2). the material after the fragmentation is carried out grinding;
(3). with the material slurrying behind the grinding;
(4). the material after the slurrying is carried out the stripping of wet method super-fine mill;
(5). the material after the ultra-fine mill stripping is carried out powerful rapid drying and collects goods,
Described before slurrying begins back to powerful rapid drying and begins the adding tensio-active agent carry out surface modification and keep that material is in soaking condition in the ultra-fine mill stripping process.
In the technique scheme, described adding tensio-active agent carries out the time of surface modification can shell the back stage to the dry beginning of brute force rapid-curing cutback at slurrying stage, wet method super-fine mill stripping stage and wet method super-fine mill.It is better wherein to carry out adding in the wet method super-fine mill stripping process tensio-active agent at material, and it is best to add tensio-active agent in material carries out time second half section of wet method super-fine mill stripping process.No matter add tensio-active agent all should stir in what in stage.To be in soaking condition be that temperature of charge reaches 30 ℃～80 ℃ to material in the ultra-fine mill stripping of the described maintenance process, and the best is 50 ℃～80 ℃.The add-on of described tensio-active agent is 1%～10%, and the best is 3%～5%.Described tensio-active agent requires can dissolve in water under 30 ℃～80 ℃ conditions, and tensio-active agent of the present invention can be stearic acid or its esters, also can be silane or titanic acid ester.The present invention compared with prior art has following advantage:
1. activation rate height.Because tensio-active agent begins back to powerful rapid drying in slurrying and begins preceding adding, especially carry out the stripping stage adding of wet method super-fine mill at material, stir again, can make tensio-active agent be coated on the material particles surface more equably like this, thereby make the activation rate can be up to 99%.And the activation rate that dry method is mediated at a high speed generally can only reach 80%～90%.
2. cost is low.Adopted dry method to mediate in the past, and the energy consumption when working except that the high speed kneader, also need be warmed to more than 70 ℃ material and just can carry out surface treatment, whole process energy consumption is bigger, and cost is higher.And the inventive method does not need extra kneading and heating, makes full use of the heat that produces in the wet method super-fine mill stripping process and can reach requirement, and wet method super-fine mill stripping process has replaced kneading process simultaneously, thereby cost is low.
3. reduced investment.Adopted dry method to mediate needs investment high speed kneader in the past, and the inventive method does not need this facility investment.
4. method is simple.Dry method kneading in the past is to insert a surface modification technology after preparation lime carbonate, talcous ultra-fine process separately, and the inventive method is when making full use of wet method super-fine mill stripping process and producing heat, ultra-fine mill stripping technology is mediated technology with heating to be merged, thereby saved original heating and mediated technology, made entire method obtain simplifying.
5. efficient height.Because dry method was mediated surface treatment for being interrupted production in the past, processing power is low, and the inventive method can realize continuous processing, so processing power improves greatly.
6. dosing is few.Wet method surface modification dosing is 1/2nd of a dry method.
In sum, the present invention compared with prior art one comes advantage and remarkably productive, and two have overcome described field those of ordinary skill traditional prejudice for a long time, therefore has significant technical progress and creativeness.
Below in conjunction with embodiment the present invention is further described:
Embodiment one: a kind of lime carbonate, steatitic surface modifying method, and adopting lime carbonate or talcum ore deposit is raw material, and operation according to the following steps successively:
The first step: raw material is carried out fragmentation, be about to lime carbonate that mining comes out or talcum ore deposit through crusher in crushing.
Second step: with Raymond mill or miscellaneous equipment grinding, make the material fineness reach 325 orders the material after the fragmentation.
The 3rd step: with the material slurrying behind the grinding.Be about to behind the grinding material Jia Shui, add grinding aid and be configured to solid content concentration 20%～80%, best at 50%～75% slurry and stir.Wherein the add-on of grinding aid medicament is 0.1%～2%.
The 4th step: the material after the slurrying is carried out ultra-fine mill stripping and surface modification.Adopt 2 to 6 ultra-fine disintegrating machines series connection of wet types to constitute mill stripping technologies continuously according to fineness requirement, while and grind to shell during 1 ultra-fine disintegrating machine mill stripping in the end and add stearic acid or its esters surfactant.The add-on of described surfactant is 1%～3%.To notice that in ultra-fine mill stripping process temperature of charge will reach 50 ℃～80 ℃, so that surface modification obtains effect preferably.Generally speaking, wet method super-fine mill stripping equipment is equipped with refrigerating unit, and in order to the reduction temperature of charge, and need close refrigerating unit this moment, allows material keep heating up.
The 5th step: the material after ultra-fine mill stripping and the surface modification is carried out powerful rapid drying and collects goods.Adopt the strong drying machine as drying plant, material after the surface modification is sent into the strong drying machine, therefore this machine has rapid drying, pulverizing and three kinds of functions of classification simultaneously, and especially rapid drying process can not destroyed the surfactivity of material, can obtain degree of activation and be 99% goods.This step also can adopt other drying plant to carry out drying, pulverizes with classification to the exsiccant material then and collects goods.But must guarantee that drying process does not influence the surfactivity of goods.
Embodiment two: a kind of lime carbonate, steatitic surface modifying method, described surface modification treatment are located at material to carry out adding tensio-active agent before wet method super-fine mill stripping back begins to powerful rapid drying and stirring with whipping device.Other is identical with embodiment one.
Embodiment three: a kind of lime carbonate, steatitic surface modifying method, described surface modification treatment are located at slurrying stage adding tensio-active agent.Other and embodiment-identical.
Claims (10)
1. a lime carbonate, steatitic surface modifying method, adopting lime carbonate or talcum mineral is raw material, and successively raw material is carried out following processing:
(1). raw material is carried out fragmentation;
(2). the material after the fragmentation is carried out grinding;
(3). with the material slurrying behind the grinding;
(4). the material after the slurrying is carried out the stripping of wet method super-fine mill;
(5). the material after the ultra-fine mill stripping is carried out powerful rapid drying and collects goods,
It is characterized in that: the adding tensio-active agent carries out surface modification and keeps that material is in soaking condition in the ultra-fine mill stripping process before slurrying begins back to powerful rapid drying and begins.
2. surface modifying method according to claim 1 is characterized in that: carry out adding tensio-active agent in the wet method super-fine mill stripping process at material.
3. surface modifying method according to claim 2 is characterized in that: add tensio-active agent in material carries out time second half section of wet method super-fine mill stripping process.
4. surface modifying method according to claim 1 is characterized in that: carry out adding tensio-active agent before wet method super-fine mill stripping back begins to powerful rapid drying and stirring at material.
5. surface modifying method according to claim 1 is characterized in that: to be in soaking condition be that temperature of charge reaches 30 ℃～80 ℃ to material in the ultra-fine mill stripping of the described maintenance process.
6. surface modifying method according to claim 5 is characterized in that: described temperature of charge reaches 50 ℃～80 ℃.
7. surface modifying method according to claim 1 is characterized in that: the add-on of described tensio-active agent is 1%～10%.
8. surface modifying method according to claim 7 is characterized in that: the add-on of described tensio-active agent is 3%～5%.
9. surface modifying method according to claim 1 is characterized in that: described tensio-active agent is stearic acid or its esters.
10. surface modifying method according to claim 1 is characterized in that: described Surfactant is silane or titanic acid ester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110832 CN1203192A (en) | 1998-05-08 | 1998-05-08 | Process for surface modification of calcium carbonate and talk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110832 CN1203192A (en) | 1998-05-08 | 1998-05-08 | Process for surface modification of calcium carbonate and talk |
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| Publication Number | Publication Date |
|---|---|
| CN1203192A true CN1203192A (en) | 1998-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110832 Pending CN1203192A (en) | 1998-05-08 | 1998-05-08 | Process for surface modification of calcium carbonate and talk |
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| CN (1) | CN1203192A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320065A (en) * | 2015-06-26 | 2017-01-11 | 池州学院 | Preparation method of talcum powder and heavy calcium carbonate powder slurry with high solid content |
| CN110565432A (en) * | 2019-09-19 | 2019-12-13 | 泉州市东紫环保科技有限公司 | Modified heavy calcium carbonate powder used as neutral paper filler and preparation method thereof |
| CN111663364A (en) * | 2020-06-17 | 2020-09-15 | 辽宁艾海滑石有限公司 | Preparation method of wet papermaking coating slurry liquid |
-
1998
- 1998-05-08 CN CN 98110832 patent/CN1203192A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320065A (en) * | 2015-06-26 | 2017-01-11 | 池州学院 | Preparation method of talcum powder and heavy calcium carbonate powder slurry with high solid content |
| CN106320065B (en) * | 2015-06-26 | 2018-03-27 | 池州学院 | A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry |
| CN110565432A (en) * | 2019-09-19 | 2019-12-13 | 泉州市东紫环保科技有限公司 | Modified heavy calcium carbonate powder used as neutral paper filler and preparation method thereof |
| CN111663364A (en) * | 2020-06-17 | 2020-09-15 | 辽宁艾海滑石有限公司 | Preparation method of wet papermaking coating slurry liquid |
| CN111663364B (en) * | 2020-06-17 | 2022-07-12 | 辽宁艾海滑石有限公司 | Preparation method of wet papermaking coating slurry liquid |
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