CN102773173A - Grading method of ground limestone - Google Patents
Grading method of ground limestone Download PDFInfo
- Publication number
- CN102773173A CN102773173A CN2012102664192A CN201210266419A CN102773173A CN 102773173 A CN102773173 A CN 102773173A CN 2012102664192 A CN2012102664192 A CN 2012102664192A CN 201210266419 A CN201210266419 A CN 201210266419A CN 102773173 A CN102773173 A CN 102773173A
- Authority
- CN
- China
- Prior art keywords
- powdered whiting
- flow type
- ground limestone
- stage division
- particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a grading method of narrow particle grade superfine ground limestone and belongs to the field of mineral processing. The grading method includes the following steps: a. delivering ground limestone raw materials into a jet flow grading machine to remove large particle ground limestone; b. delivering raw materials free of the large particle ground limestone in the step a. into a multi-grade spiral-flow type grading machine to remove fine particles and obtain graded ground limestone. The grading method utilizes the jet flow grading machine and the multi-grade spiral-flow type grading machine in matching mode, effectively removes large particles and fine particles in the ground limestone to obtain the narrow particle grade superfine ground limestone with strictly controlled particle grade and enables the mass of the ground limestone finally obtained with the particle size being 5-15mum to occupy over 93% of the total mass.
Description
Technical field
The invention belongs to the mineral manufacture field, be specifically related to a kind of stage division of powdered whiting.
Background technology
Powdered whiting be a kind of be the carbonate mine powder that raw material adopts Ginding process to produce with calcite, chalk, marble etc.Powdered whiting is done the filler and the pigment of plastics, papermaking, coating, printing ink, rubber etc. because of characteristics such as its whiteness is high, oil factor is low and inexpensive are widely used, and is the maximum inorganic nonmetal mineral fillers of current production rate and consumption.At the extraordinary papermaking pigment of some applications, particularly printing ink, coating and part, not only require the powdered whiting product granularity thin, and require narrow particle size distribution, like 5～15 μ m, wherein less than 5 μ m and all can not be greater than 5% greater than 15 μ m part.But existing grinding and processing technology is difficult to produce narrow particle size distribution, the strict extra fine heavy calcium carbonate powder body of grade control.
Summary of the invention
Technical problem to be solved by this invention provides a kind of stage division that obtains narrow grade superfine heavy calcium carbonate.
The technical solution adopted for the present invention to solve the technical problems is: the stage division of powdered whiting comprises the steps:
A, the powdered whiting raw material is sent into the jet classifying machine remove the bulky grain powdered whiting;
B, step a is removed raw material behind the bulky grain powdered whiting send into multistage spiral-flow type grader and remove subparticle, obtain the powdered whiting after the classification.
Wherein, the powdered whiting of bulky grain described in the said method is meant the powdered whiting particle of particle diameter greater than 15 μ m.
Wherein, subparticle described in the said method is meant the powdered whiting particle of particle diameter less than 5 μ m.
Wherein, among the step a, the employed compressed air pressure of said jet classifying machine is 3～9MP in the said method, and mass of solid particles concentration is 3～10g/L in the feed Dual-Phrase Distribution of Gas olid.
Further, among the step a, the employed compressed air pressure of said jet classifying machine is 6～7MP, and mass of solid particles concentration is 6～10g/L in the feed Dual-Phrase Distribution of Gas olid.
Further again, among the step a, the additional air capacity of said jet classifying machine is 2～4Nm
3/ min.
Wherein, in the said method among the step b, mass of solid particles concentration 5～100g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
Wherein, in the said method among the step b, mass of solid particles concentration 10～30g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
Further, among the step b, the electric machine frequency 15～50Hz of said multistage spiral-flow type grader.
Further again, among the step b, the electric machine frequency 20～40Hz of said multistage spiral-flow type grader.
Wherein, the machine of jet classifying described in the said method is high-accuracy jet classifying machine, and its model is BD-90-3.
Wherein, multistage spiral-flow type grader is meant the multistage cyclosizer of LHP/Y type described in the said method.
The inventive method specifically can be implemented in such a way: the stage division of powdered whiting, and comprising the steps: a, the powdered whiting raw material is sent into model is that the jet classifying machine of BD-90-3 is removed the powdered whiting particle of particle diameter greater than 15 μ m; The employed compressed air pressure of said jet classifying machine is 6～7MP, and mass of solid particles concentration is 6～10g/L in the feed Dual-Phrase Distribution of Gas olid, and additional air capacity is 2～4Nm
3/ min;
B, step a is removed raw material behind the bulky grain powdered whiting send into the multistage spiral-flow type grader of LHP/Y-3 type and remove the powdered whiting particle of particle diameter, obtain the powdered whiting after the classification less than 5 μ m; Mass of solid particles concentration 10～30g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader; Electric machine frequency 20～the 40Hz of said multistage spiral-flow type grader.
The invention has the beneficial effects as follows: the inventor finds; Adopt the jet classifying machine can effectively remove the bulky grain in the powdered whiting; Adopt multistage spiral-flow type grader can effectively remove the subparticle in the powdered whiting, therefore, the present invention is used jet classifying machine and multistage spiral-flow type grader; Effectively remove bulky grain and subparticle in the powdered whiting, obtain the strict narrow grade superfine heavy calcium carbonate of grade control.The model of control jet grader of the present invention and multistage spiral-flow type grader; The electric machine frequency of the mass concentration of strict control compressed air pressure, solid particle, additional air capacity, multistage spiral-flow type grader; All be in order to reduce bulky grain and the subparticle in the powdered whiting that finally obtains; The above-mentioned multiple parameter effect of cooperatively interacting, the quality of the feasible powdered whiting of particle diameter between 5～15 μ m that finally obtains accounts for more than 93% of gross mass, has obtained unforeseeable technique effect.
Description of drawings
Fig. 1 is a jet classifying machine classification principle sketch map.
Be labeled as among the figure: compressed air and material channel 1, air duct 2, fine powder passage 3, middle powder passage 4, meal passage 5.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
The stage division of powdered whiting comprises the steps: a, the powdered whiting raw material is sent into the jet classifying machine removes the bulky grain powdered whiting; B, step a is removed raw material behind the bulky grain powdered whiting send into multistage spiral-flow type grader and remove subparticle, obtain the powdered whiting after the classification.Jet classifying machine classification principle is as shown in Figure 1, comprises compressed air and material channel 1 (being the passage of feed Dual-Phrase Distribution of Gas olid), air duct 2, fine powder passage 3, middle powder passage 4, meal passage 5; Compressed air and powdered whiting get into compressed air and material channel 1, and air gets into from air duct 2, owing to the power that compressed air provides, the powdered whiting particle respectively from fine powder passage 3, powder passage 4 and meal passage 5 see off, reach the effect of classification.The inventor finds; Adopt the jet classifying machine can effectively isolate the bulky grain in the powdered whiting, simultaneously, adopt multistage spiral-flow type grader can effectively isolate the subparticle in the powdered whiting; Therefore; The present invention is used jet classifying machine and multistage spiral-flow type grader, effectively removes bulky grain and subparticle in the powdered whiting, obtains the strict narrow grade superfine heavy calcium carbonate of grade control.
Preferably, in order to satisfy the requirement of most of enterprise to the powdered whiting granularity as far as possible, bulky grain powdered whiting described in the said method is meant the powdered whiting particle of particle diameter greater than 15 μ m.
Preferably, in order to satisfy the requirement of most of enterprise to the powdered whiting granularity as far as possible, subparticle described in the said method is meant the powdered whiting particle of particle diameter less than 5 μ m.
Preferably, better in order to make grading effect, among the step a, the employed compressed air pressure of said jet classifying machine is 3～9MP in the said method, and mass of solid particles concentration is 3～10g/L in the feed Dual-Phrase Distribution of Gas olid.
Further, better in order to make grading effect, among the step a, the employed compressed air pressure of said jet classifying machine is 6～7MP, and mass of solid particles concentration is 6～10g/L in the feed Dual-Phrase Distribution of Gas olid.
Further again, better in order to make grading effect, among the step a, the additional air capacity of said jet classifying machine is 2～4Nm
3/ min.
Preferably, better in order to make grading effect, in the said method among the step b, mass of solid particles concentration 5～100g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
Preferably, better in order to make grading effect, in the said method among the step b, mass of solid particles concentration 10～30g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
Further, better in order to make grading effect, among the step b, the electric machine frequency 15～50Hz of said multistage spiral-flow type grader.
Further again, better in order to make grading effect, among the step b, the electric machine frequency 20～40Hz of said multistage spiral-flow type grader.
Wherein, the machine of jet classifying described in the said method is high-accuracy jet classifying machine, and its model is BD-90-3.
Wherein, multistage spiral-flow type grader is meant the multistage cyclosizer of LHP/Y type described in the said method.
Be further described through the embodiment specific embodiments of the invention below, but therefore protection scope of the present invention be not limited among the embodiment.
Embodiment one:
The size distribution d of powdered whiting
15=5 μ m (d
15=5 μ m represent 15% grain graininess less than 5 μ m, down with), d
50=10 μ m, d
75=15 μ m, d
97=20 μ m, d
99=36 μ m 1000kg under the 6MP compressed air pressure, evenly feed the high-accuracy jet classifying machine of BD-90-3 (deriving from Luoyang Bodan Electromechanical Technology Co., Ltd.) with the solid masses concentration of 6g/L, and additional air capacity is 3Nm
3/ min rejects greater than the bulky grain more than the 15 μ m (called after coarse fraction product), collects and weighs; In the collection, fine particle stage material and mix and to feed the multistage cyclosizer of LHP/Y-3 type (deriving from Weifang powder technology equipment Co., Ltd just far away) with 20g/L solid masses concentration and separate less than 5 μ m subparticles, electric machine frequency 30Hz collects and weighs; Collect the product of 1 grade of classification and 2 grades of classifications and evenly mix (grade product in by name), weigh and take a sample and carry out grain size analysis with laser particle size analyzer.Each product product quality and results of grain size analysis are listed in table 1.
Embodiment two:
Powdered whiting size distribution d
15=5 μ m, d
50=10 μ m, d
75=15 μ m, d
97=20 μ m, d
99=36 μ m 1000kg under the 7MP compressed air pressure, evenly feed the high-accuracy jet classifying machine of BD-90-3 (deriving from Luoyang Bodan Electromechanical Technology Co., Ltd.) with the solid masses concentration of 10g/L, and additional air capacity is 4Nm
3/ min rejects greater than the bulky grain more than the 20 μ m (called after coarse fraction product), collects and weighs; In the collection, fine particle stage material and mix and to feed the multistage cyclosizer of LHP/Y-3 type (deriving from Weifang powder technology equipment Co., Ltd just far away) with 10g/L solid masses concentration and separate less than 2 μ m subparticles (micro-size fraction product by name); Electric machine frequency 40Hz collects and weighs; Collect the product (grade product 2 in by name) of 1 grade of classification product (grade product 1 in the called after) and 2 grades of classifications, weigh respectively and take a sample and carry out grain size analysis with laser particle size analyzer.Each product product quality and results of grain size analysis are listed in table 1.
Table 1 is implemented row product quality and results of grain size analysis
Annotate: among the embodiment one, in the middle grade product, being 3.01% less than the content of 5 μ m, is 2.94% greater than the content of 15 μ m.Among the embodiment two, in middle grade 1 product, being 4.16% less than the content of 10 μ m, is 2.85% greater than 20 μ m content; In in grade 2 products, be 3.87% less than the content of 2 μ m, be 2.96% greater than the content of 10 μ m.
Can know that from embodiment the present invention is used jet classifying machine and multistage spiral-flow type grader, can effectively remove bulky grain and subparticle in the powdered whiting, obtain the strict narrow grade superfine heavy calcium carbonate of grade control.
Claims (10)
1. the stage division of powdered whiting is characterized in that comprising the steps:
A, the powdered whiting raw material is sent into the jet classifying machine remove the bulky grain powdered whiting;
B, step a is removed raw material behind the bulky grain powdered whiting send into multistage spiral-flow type grader and remove subparticle, obtain the powdered whiting after the classification.
2. the stage division of powdered whiting according to claim 1, it is characterized in that: said bulky grain powdered whiting is meant the powdered whiting particle of particle diameter greater than 15 μ m.
3. the stage division of powdered whiting according to claim 1, it is characterized in that: among the step b, said subparticle is meant the powdered whiting particle of particle diameter less than 5 μ m.
4. according to the stage division of claim 1,2 or 3 described powdered whitings, it is characterized in that: among the step a, the employed compressed air pressure of said jet classifying machine is 3～9MP, and mass of solid particles concentration is 3～10g/L in the feed Dual-Phrase Distribution of Gas olid.
5. the stage division of powdered whiting according to claim 4, it is characterized in that: among the step a, the employed compressed air pressure of said jet classifying machine is 6～7MP, and mass of solid particles concentration is 6～10g/L in the feed Dual-Phrase Distribution of Gas olid.
6. the stage division of powdered whiting according to claim 5, it is characterized in that: among the step a, the additional air capacity of said jet classifying machine is 2～4Nm
3/ min.
7. according to the stage division of claim 1,2 or 3 described powdered whitings, it is characterized in that: among the step b, mass of solid particles concentration 5～100g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
8. the stage division of powdered whiting according to claim 7 is characterized in that: among the step b, and mass of solid particles concentration 10～30g/L in the feed Dual-Phrase Distribution of Gas olid of said multistage spiral-flow type grader.
9. the stage division of powdered whiting according to claim 8 is characterized in that: among the step b, and the electric machine frequency 15～50Hz of said multistage spiral-flow type grader.
10. the stage division of powdered whiting according to claim 9 is characterized in that: among the step b, and the electric machine frequency 20～40Hz of said multistage spiral-flow type grader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102664192A CN102773173A (en) | 2012-07-30 | 2012-07-30 | Grading method of ground limestone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102664192A CN102773173A (en) | 2012-07-30 | 2012-07-30 | Grading method of ground limestone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102773173A true CN102773173A (en) | 2012-11-14 |
Family
ID=47118414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102664192A Pending CN102773173A (en) | 2012-07-30 | 2012-07-30 | Grading method of ground limestone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102773173A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319914A (en) * | 2013-05-27 | 2013-09-25 | 贺州市隆德粉体有限公司 | Calcium carbonate special for non-woven fabric and preparation method thereof |
| CN104403403A (en) * | 2014-11-18 | 2015-03-11 | 江苏群鑫粉体材料有限公司 | Production method of heavy calcium carbonate for special coating |
| CN114618779A (en) * | 2021-12-31 | 2022-06-14 | 贺州市耀德粉体有限公司 | Calcium carbonate powder multi-stage classification method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2870908A (en) * | 1954-12-17 | 1959-01-27 | Dorr Oliver Inc | Hydrocyclones in closed-circuit grinding operations |
| CN101143350A (en) * | 2007-03-20 | 2008-03-19 | 青岛科技大学 | Powder granule circulation whirlwind multi-level grading device and its grading method and use |
| WO2008055495A2 (en) * | 2006-11-10 | 2008-05-15 | Calcarb Ag | Method for manufacturing fine mineral powder products |
-
2012
- 2012-07-30 CN CN2012102664192A patent/CN102773173A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2870908A (en) * | 1954-12-17 | 1959-01-27 | Dorr Oliver Inc | Hydrocyclones in closed-circuit grinding operations |
| WO2008055495A2 (en) * | 2006-11-10 | 2008-05-15 | Calcarb Ag | Method for manufacturing fine mineral powder products |
| CN101143350A (en) * | 2007-03-20 | 2008-03-19 | 青岛科技大学 | Powder granule circulation whirlwind multi-level grading device and its grading method and use |
Non-Patent Citations (2)
| Title |
|---|
| 张统潮等: "射流原理在微粉粒度分级中的应用", 《合肥工业大学学报》 * |
| 郑少华等: "超细粉射流分级机工业样机的研制", 《流体机械》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319914A (en) * | 2013-05-27 | 2013-09-25 | 贺州市隆德粉体有限公司 | Calcium carbonate special for non-woven fabric and preparation method thereof |
| CN104403403A (en) * | 2014-11-18 | 2015-03-11 | 江苏群鑫粉体材料有限公司 | Production method of heavy calcium carbonate for special coating |
| CN114618779A (en) * | 2021-12-31 | 2022-06-14 | 贺州市耀德粉体有限公司 | Calcium carbonate powder multi-stage classification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209736075U (en) | Sorting system for removing mica in machine-made sand | |
| CN202447189U (en) | Magnetic particle sorting and screening device | |
| CN103894343A (en) | Wind power sand selecting device with adjustable product fineness modulus | |
| CN109351467A (en) | A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic | |
| CN203737591U (en) | Sand winnowing equipment | |
| CN102773173A (en) | Grading method of ground limestone | |
| CN108940564A (en) | A kind of low-grade barite classification sorting process of fine fraction | |
| CN106492977A (en) | The strong magnetic reverse floatation process of lean hematite high pressure roller mill, weak magnetic | |
| CN102380449B (en) | Natural color sand production line | |
| CN101693249A (en) | Flotation tailing dry-type separation high pressure air stream grinding powder recycling process | |
| CN102671863B (en) | Mineral dressing machine and mineral dressing method | |
| CN204564529U (en) | A kind of medicinal powder screening plant | |
| CN102728555B (en) | A kind of dry separation enrichment and separation method and the system for dry separation enrichment and separation method | |
| CN115945288A (en) | Metal mineral enrichment process and system based on dry separation equipment | |
| CN110215981B (en) | Stepped discharge air flow crushing, classifying and sorting device and method | |
| Kundu et al. | Performance evaluation of the VSK separator for treating mineral fines | |
| CN218742467U (en) | High-pressure roller mill closed-circuit screening preselection device | |
| CA3144756A1 (en) | Method for the beneficiation of iron ore streams | |
| CN104138852A (en) | Method for separating miscellaneous stone from talcum mine | |
| CN102773149B (en) | Dressing and purification method of powder quartz | |
| CN202951540U (en) | Pyrite cinder grinding magnetic separation production line | |
| CN105689117B (en) | A kind of concentration magnetic separator and the method for concentration based on the concentration magnetic separator | |
| CN204816869U (en) | Ventilative magnetic separation roller | |
| CN110773315B (en) | Full-particle-level pre-selection discarding method for magnetite | |
| CN107971223A (en) | Particle wind power separator, copper-aluminum separation treatment system of lithium battery and copper-aluminum separation treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121114 |