CN114618779A - Calcium carbonate powder multi-stage classification method - Google Patents
Calcium carbonate powder multi-stage classification method Download PDFInfo
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- CN114618779A CN114618779A CN202111674383.7A CN202111674383A CN114618779A CN 114618779 A CN114618779 A CN 114618779A CN 202111674383 A CN202111674383 A CN 202111674383A CN 114618779 A CN114618779 A CN 114618779A
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- powder
- calcium carbonate
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- classification
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- 239000000843 powder Substances 0.000 title claims abstract description 160
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 104
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910000599 Cr alloy Inorganic materials 0.000 abstract 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 239000000788 chromium alloy Substances 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 description 39
- 229910021532 Calcite Inorganic materials 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000004579 marble Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
Abstract
The invention discloses a calcium carbonate powder multistage classification grading method, which relates to the field of aluminum-chromium alloy casting, and comprises the following steps of conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 900 square meters per hour, and powder with the particle size range of 0-20 microns is obtained; conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, and adjusting the secondary air quantity to 700-800 square meters per hour to obtain two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder; according to the invention, the powder calcium carbonate is conveyed to the turbine classifier, and multiple tests show that the production efficiency is high, the energy consumption is optimal, and the continuous production is facilitated, so that when the classification granularity is larger, the small rotating speed and the large air volume are adopted, and when the classification granularity is finer, the air volume is relatively reduced, and the rotating speed is relatively increased.
Description
Technical Field
The invention relates to the field of calcium carbonate powder grading, in particular to a multi-stage classification and grading method for calcium carbonate powder.
Background
Calcium carbonate is an inorganic compound, commonly known as: limestone, stone powder, marble and the like, and mainly comprises the following components: calcite of the formula CaCO3Neutral, basically insoluble in water and soluble in hydrochloric acid. It is a common substance on earth, exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also a main component of animal bones or shells, calcium carbonate is an important building material and has wide industrial application, and the calcium carbonate is generated by combining calcium ions and carbonate ions, so the calcium carbonate is a calcium salt and a carbonate.
Calcium carbonate powder is an important inorganic powder filler, the calcium carbonate takes limestone, marble and calcite as main production raw materials, and the calcium carbonate is used as the inorganic filler and has the effects of wear resistance, high temperature resistance and flame retardance, so that the calcium carbonate powder has important application in the technical fields of paper industry, plastic industry, coating industry, rubber industry and the like. Calcium carbonate products can be classified into extra heavy and light calcium carbonates according to the processing technique. At present, the classification process is the most critical process for determining the quality of calcium carbonate products, the existing calcium carbonate classification process adopts airflow crushing, although the crushing process technology is mature, the particle size distribution of the obtained calcium carbonate is wide, the extraction rate of powder particles in each particle size range is low, and the performance of the calcium carbonate is limited.
According to the search, the chinese patent No. 201910606709.9 discloses a multistage classification and classification method for calcium carbonate powder, which adopts primary air separation, secondary air separation and tertiary air separation, and has high extraction efficiency, but is not the best scheme, and improves the extraction rate of calcium carbonate particles by improving the air volume, but neglects the classification strength or the median strength in the fine classification of the calcium carbonate particles, so that the classification efficiency is increased when the air volume is increased, and when the air volume is too large, the classification efficiency is gently reduced, the optimal air volume and the rotation speed cannot be reached, and the resource waste is caused.
Disclosure of Invention
The invention aims to: in order to solve the technical problem, the method for classifying and grading calcium carbonate powder in multiple stages comprises the following steps,
conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 800-one square meter per hour, and powder with the particle size range of 0-20 micrometers is obtained;
conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, and adjusting the secondary air volume to 700 plus 800 square meters per hour to obtain two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder;
step three, conveying the first-stage fine powder obtained in the step two to a turbine classifier to obtain two kinds of powder of 0-5um and 5-10um which are respectively called second-stage ultrafine powder and second-stage fine powder;
step four, conveying the secondary coarse powder obtained in the step two to a turbine classifier to obtain three kinds of powder of 0-6um, 6um-10um and 10um-20um which are respectively called as three-level ultrafine powder, three-level fine powder and three-level coarse powder;
and step five, mixing the first-grade fine powder and the second-grade fine powder to obtain 0-10um powder, mixing the second-grade ultra fine powder and the third-grade ultra fine powder to obtain 0-6um powder, and mixing the first-grade coarse powder and the third-grade coarse powder to obtain 10-20um powder.
Further, the rotating speed range of the first step grading wheel is controlled at 1900-2300r/min, and the mass of the powder calcium carbonate is 75kg-95 kg.
Further, the rotating speed range of the grading wheel in the step two is controlled to be 2300-2700r/min, the mass of the powder calcium carbonate is 70-80kg,
further, the particle size range of the powder calcium carbonate is 0-20 um.
In order to achieve the purpose, the invention provides the following technical scheme: a calcium carbonate powder multi-stage classification method comprises the following steps,
compared with the prior art, the invention has the beneficial effects that:
1. the invention conveys the powder calcium carbonate to the turbine classifier, and through a plurality of tests, when the rotating speed of the classifying wheel is increased to 2100r/min, the air quantity is increased to 850m3At the time of/h, the cumulative yield is slowly increased, which shows that the classification reaches a saturated state, the classification efficiency is increased to the maximum value of 95 percent, the single yield is 85kg, when the superfine materials are finely classified, the rotating speed is increased to 2500r/min, and the air volume is increased to 750m3In the case of/h, the cumulative yield is slowly increased, the yield of the superfine material is more than 90%, the grading efficiency is increased to the maximum value of 91.5%, the single yield is 85kg, the production efficiency is high, the energy consumption is optimal, and the continuous production is facilitated.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of examples.
The first embodiment is as follows: a multi-stage classification method for calcium carbonate powder comprises the following steps,
conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 800 square meters per hour, powder with the particle size range of 0-20 micrometers is obtained, the rotating speed range of a classifying wheel is controlled at 1900r/min, and the mass of the powder calcium carbonate is 75 kg;
conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, adjusting the secondary air quantity to 700 square meters per hour to obtain two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder respectively, controlling the rotating speed range of a classifying wheel at 2300r/min, and controlling the mass of the powder calcium carbonate to be 70 kg;
step three, conveying the first-stage fine powder obtained in the step two to a turbine classifier to obtain two kinds of powder of 0-5um and 5-10um which are respectively called second-stage ultrafine powder and second-stage fine powder;
step four, conveying the secondary coarse powder obtained in the step two to a turbine classifier to obtain three kinds of powder of 0-6um, 6um-10um and 10um-20um which are respectively called as three-level ultrafine powder, three-level fine powder and three-level coarse powder;
and step five, mixing the first-level fine powder and the second-level fine powder to obtain 0-10um powder, mixing the second-level ultrafine powder and the third-level ultrafine powder to obtain 0-6um powder, and mixing the first-level coarse powder and the third-level coarse powder to obtain 10-20um powder.
Example two: a multi-stage classification method for calcium carbonate powder comprises the following steps,
conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 850 square meters per hour, so as to obtain powder with the particle size range of 0-20 micrometers, the rotating speed range of the classifier is controlled at 2100r/min, and the mass of the powder calcium carbonate is 85 kg;
conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, adjusting the secondary air quantity to be 750 square meters per hour, obtaining two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder respectively, controlling the rotating speed range of a classifying wheel to be 2500r/min, and controlling the mass of the powder calcium carbonate to be 75 kg;
step three, conveying the first-stage fine powder obtained in the step two to a turbine classifier to obtain two kinds of powder of 0-5um and 5-10um which are respectively called as second-stage ultrafine powder and second-stage fine powder;
conveying the secondary coarse powder obtained in the step two to a turbine classifier to obtain three kinds of powder of 0-6um, 6um-10um and 10um-20um which are respectively called as three-level ultrafine powder, three-level fine powder and three-level coarse powder;
and step five, mixing the first-level fine powder and the second-level fine powder to obtain 0-10um powder, mixing the second-level ultrafine powder and the third-level ultrafine powder to obtain 0-6um powder, and mixing the first-level coarse powder and the third-level coarse powder to obtain 10-20um powder.
Example three: a multi-stage classification method for calcium carbonate powder comprises the following steps,
conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 900 square meters per hour, powder with the particle size range of 0-20 micrometers is obtained, the rotating speed range of a classifying wheel is controlled to 2300r/min, and the mass of the powder calcium carbonate is 95 kg;
conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, adjusting the secondary air quantity to be 800 square meters per hour, obtaining two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder respectively, controlling the rotating speed range of a classifying wheel to 2700r/min, and controlling the mass of the powder calcium carbonate to 80 kg;
step three, conveying the first-stage fine powder obtained in the step two to a turbine classifier to obtain two kinds of powder of 0-5um and 5-10um which are respectively called as second-stage ultrafine powder and second-stage fine powder;
step four, conveying the secondary coarse powder obtained in the step two to a turbine classifier to obtain three kinds of powder of 0-6um, 6um-10um and 10um-20um which are respectively called as three-level ultrafine powder, three-level fine powder and three-level coarse powder;
and step five, mixing the first-level fine powder and the second-level fine powder to obtain 0-10um powder, mixing the second-level ultrafine powder and the third-level ultrafine powder to obtain 0-6um powder, and mixing the first-level coarse powder and the third-level coarse powder to obtain 10-20um powder.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. A calcium carbonate powder multi-stage classification method is characterized in that: the classification method comprises the following steps of,
conveying powder calcium carbonate to a turbine classifier, wherein the first air flow is 800-one square meter per hour, and powder with the particle size range of 0-20 micrometers is obtained;
conveying the powder of 0-20um obtained in the step one to a turbine classifier for secondary classification, and adjusting the secondary air volume to 700 plus 800 square meters per hour to obtain two kinds of powder of 0-10um and 10-20um, namely first-level fine powder and first-level coarse powder respectively;
step three, conveying the first-stage fine powder obtained in the step two to a turbine classifier to obtain two kinds of powder of 0-5um and 5-10um which are respectively called as second-stage ultrafine powder and second-stage fine powder;
conveying the secondary coarse powder obtained in the step two to a turbine classifier to obtain three kinds of powder of 0-6um, 6um-10um and 10um-20um which are respectively called as three-level ultrafine powder, three-level fine powder and three-level coarse powder;
and step five, mixing the first-level fine powder and the second-level fine powder to obtain 0-10um powder, mixing the second-level ultrafine powder and the third-level ultrafine powder to obtain 0-6um powder, and mixing the first-level coarse powder and the third-level coarse powder to obtain 10-20um powder.
2. The calcium carbonate powder multistage classification and classification method according to claim 1, characterized in that: the rotating speed range of the grading wheel in the first step is controlled at 1900-2300r/min, and the mass of the powder calcium carbonate is 75kg-95 kg.
3. The calcium carbonate powder multistage classification and classification method according to claim 1, characterized in that: the rotating speed range of the grading wheel in the second step is controlled to 2300-2700r/min, and the mass of the powder calcium carbonate is 70-80 kg.
4. The calcium carbonate powder multistage classification and classification method according to claim 1, characterized in that: the particle size range of the powder calcium carbonate is 0-20 um.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047228A (en) * | 1989-05-15 | 1990-11-28 | 佳能株式会社 | The air-flow sizer, the method and apparatus of preparation colorant |
| US5016823A (en) * | 1989-05-12 | 1991-05-21 | Canon Kabushiki Kaisha | Air current classifier, process for preparing toner, and apparatus for preparing toner |
| CN102773173A (en) * | 2012-07-30 | 2012-11-14 | 四川石棉巨丰粉体有限公司 | Grading method of ground limestone |
| CN105536963A (en) * | 2015-12-08 | 2016-05-04 | 四川亿欣新材料有限公司 | Calcium carbonate powder production technology |
| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN211436521U (en) * | 2019-12-02 | 2020-09-08 | 广东玉峰粉体材料股份有限公司 | Calcium carbonate powder's production system |
-
2021
- 2021-12-31 CN CN202111674383.7A patent/CN114618779A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5016823A (en) * | 1989-05-12 | 1991-05-21 | Canon Kabushiki Kaisha | Air current classifier, process for preparing toner, and apparatus for preparing toner |
| CN1047228A (en) * | 1989-05-15 | 1990-11-28 | 佳能株式会社 | The air-flow sizer, the method and apparatus of preparation colorant |
| CN102773173A (en) * | 2012-07-30 | 2012-11-14 | 四川石棉巨丰粉体有限公司 | Grading method of ground limestone |
| CN105536963A (en) * | 2015-12-08 | 2016-05-04 | 四川亿欣新材料有限公司 | Calcium carbonate powder production technology |
| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN211436521U (en) * | 2019-12-02 | 2020-09-08 | 广东玉峰粉体材料股份有限公司 | Calcium carbonate powder's production system |
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Application publication date: 20220614 |