CN113087006A - Method for preparing calcium carbonate functional material by using artificial granite waste - Google Patents
Method for preparing calcium carbonate functional material by using artificial granite waste Download PDFInfo
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- CN113087006A CN113087006A CN202110442866.8A CN202110442866A CN113087006A CN 113087006 A CN113087006 A CN 113087006A CN 202110442866 A CN202110442866 A CN 202110442866A CN 113087006 A CN113087006 A CN 113087006A
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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
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The invention discloses a method for preparing a calcium carbonate functional material by using artificial granite waste, which comprises the steps of taking the artificial granite waste as a raw material, removing impurities by screening, performing cyclone separation, performing ball milling on the obtained material to a required granularity by using a stirring ball mill, performing surface modification on the material, and performing dehydration, drying and classification to obtain the calcium carbonate functional material. The calcium carbonate functional material prepared by the invention can be applied to the fields of breathable film fillers, coating fillers, plastic master batch fillers, printing ink fillers, high-end papermaking and the like.
Description
Technical Field
The invention belongs to the technical field of waste recycling, and particularly relates to a method for preparing a calcium carbonate functional material by using artificial granite waste. The material produced by the invention can be applied to the fields of breathable film fillers, coating fillers, plastic master batch fillers, printing ink fillers, high-end papermaking and the like.
Background
The artificial granite is an artificial decoration material made up by using natural marble powder and unsaturated resin through the processes of vacuum stirring, vibration forming, high-temp. solidification, cutting and grinding and polishing. The artificial granite has the advantages of changeable colors and patterns, natural resource saving and the like, so that the artificial granite is widely applied to the decoration of the outer facade and the interior decoration of a building, and a large amount of artificial granite waste is generated along with the production and processing process of the artificial granite. The artificial granite waste mainly comprises calcium carbonate powder, unsaturated polyester resin, cutting material scraps, polishing materials and other components, and at present, many enterprises discharge and accumulate the waste residues in the open air, and although some waste residues are directly buried, the artificial granite waste can cause environmental pollution and ecological damage. How to treat and utilize the processing waste and turn waste into wealth become a very concern problem for a plurality of stone processing enterprises.
The resource utilization of the artificial granite waste is a problem which needs serious treatment. The method develops a key technology of comprehensive utilization of three wastes through a resource utilization technology of artificial granite waste, constructs a novel industrial ecological system, and is an effective way for solving the environmental pollution of the artificial granite industry.
Disclosure of Invention
The invention aims to provide a method for preparing a calcium carbonate functional material by using artificial granite waste, which recycles and reuses calcium carbonate in the artificial granite waste and prepares a novel functional material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1) preparing the artificial granite waste into slurry with solid content of 10-50%, and sieving to remove large-size impurities with granularity larger than 10 meshes;
2) preparing the treated slurry into slurry with solid content of 5-50%, and sieving to remove large-particle impurities with the particle size of + 80-10 meshes;
3) preparing the treated materials into slurry with solid content of 5-50%, and performing cyclone separation to obtain medium-sized components with the granularity of +325 meshes to-80 meshes;
4) preparing the materials treated in the step 3) into slurry with solid content of 30-50%, and crushing to 800-6000 meshes;
5) and 4) adding a surface modifier into the treated material to modify, dehydrating, drying and grading to obtain the calcium carbonate functional material.
In the invention, the artificial granite waste refers to solid waste generated in the production process of the artificial granite, and the main components of the artificial granite waste are marble powder, unsaturated polyester resin, cutting material scraps and polishing materials.
Preferably, in the step 1), a polyurethane grid screen is adopted for screening to remove large-size impurities with the granularity of more than 10 meshes.
Preferably, in the step 2), a linear vibrating screen or a rotary vibrating screen is adopted when the large-particle impurities are removed by screening.
Preferably, in the step 3), the cyclone separation adopts a cyclone group consisting of cyclone tubes with the diameter of 10-200mm, and the pressure of the cyclone group during working is 0.05-1.0 Mpa.
Preferably, in the step 4), the ball mill is adopted for crushing, and the ball mill is stirred and milled by a wet method, wherein the ball milling temperature is normal temperature.
Preferably, in step 5), the surface modifier comprises one or more of sodium stearate, titanate coupling agent, aluminate coupling agent, zircoaluminate coupling agent and silane coupling agent; the modification temperature is 50-90 ℃.
Preferably, in the step 5), a plate-and-frame filter press or a horizontal screw centrifuge is adopted for dewatering.
Preferably, in step 5), the drying is performed by using a spray dryer, a flash dryer or a steam dryer.
The invention adopts different sieves to remove impurities with more than 325 meshes step by step, and has the advantages that firstly, the service life of the sieve can be prolonged, and impurities with large particle size are easy to damage the sieve. Secondly, the separation efficiency is improved, and the problem of screen hole blockage is avoided.
The calcium carbonate functional material prepared by utilizing the artificial granite waste can be applied to the fields of breathable film fillers, coating fillers, plastic master batch fillers, printing ink fillers, high-end papermaking and the like.
Drawings
FIG. 1 is a flow chart of a method for preparing a calcium carbonate functional material by using artificial granite waste.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
Example 1:
as shown in fig. 1, a method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1. weighing 50kg of artificial granite waste, and adding water to prepare slurry with the solid content of 10%;
2. removing impurities larger than 10 meshes of the prepared slurry with the solid content of 10 percent by using a polyurethane grid plate sieve dewatering screen;
3. removing impurities larger than 10 meshes from the slurry, and separating large particle components of plus 80-10 meshes through an 80-mesh rotary vibration screen;
4. adjusting the solid content of the slurry passing through an 80-mesh rotary vibration sieve, and adding water to dilute the slurry until the solid content is 5%;
5. separating the diluted slurry by a swirler group consisting of phi 150mm and phi 75mm, inputting the slurry into a phi 150mm swirler tube, wherein the working pressure is 0.05 MPa; the overflow from the rotational flow pipe of phi 150mm is used as the raw material of the rotational flow pipe of phi 75mm, the working pressure of the rotational flow pipe of phi 75mm is 0.1MPa, and the overflow from the rotational flow pipe of phi 75mm is used as the raw material of the next step. Underflow of two rotational flow pipes of a rotational flow pipe with the phi 150mm and a rotational flow pipe with the phi 75mm is combined into medium particle components with the meshes of +325 to-80;
6. dewatering the overflow slurry of the rotational flow pipe with the diameter of 75mm, adjusting the solid content to be 50%, inputting the slurry into a stirring ball mill, detecting the granularity of calcium carbonate in the slurry by a laser granularity meter after the slurry is ball-milled for 60 minutes, wherein D97 is approximately equal to 14.2 um;
7. transferring the ball-milled slurry to a modification reaction kettle, heating to 90 ℃, adding sodium stearate according to the proportion of 1.5 percent of the total mass of calcium carbonate in the slurry, modifying for 60min, and stirring the reaction kettle at the rotating speed of 200 r/min;
8. dehydrating the modified slurry by using a horizontal screw centrifuge to obtain a filter cake with solid content of 65 percent;
9. drying the filter cake by using a flash evaporation dryer, wherein the air inlet temperature is 240 ℃, the air outlet temperature is 80 ℃, and calcium carbonate functional material powder with the water content of 0.8% is obtained;
10. the dried material was classified by a classifier (the classification particle size was set to 10um) to obtain two types of calcium carbonate functional powder materials of 800 mesh and 1250 mesh.
Example 2:
as shown in fig. 1, a method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1. weighing 100kg of artificial granite waste, and adding water to prepare slurry with the solid content of 20%;
2. removing impurities larger than 10 meshes of the prepared slurry with the solid content of 20 percent by using a polyurethane grid plate sieve dewatering screen;
3. removing impurities larger than 10 meshes from the slurry, and separating large particle components of plus 80-10 meshes by using an 80-mesh linear vibrating screen;
4. adjusting the solid content of the slurry passing through an 80-mesh linear vibrating screen, and adding water to dilute the slurry until the solid content is 10%;
5. separating the diluted slurry by a hydrocyclone group consisting of phi 100mm and phi 75mm, firstly inputting the slurry into a phi 100mm hydrocyclone pipe, and controlling the working pressure to be 0.01 MPa; the overflow from the rotational flow pipe of phi 100mm is used as the raw material of the rotational flow pipe of phi 50mm, the working pressure of the rotational flow pipe of phi 50mm is 0.15MPa, and the overflow from the rotational flow pipe of phi 50mm is used as the raw material of the next step. Underflow of two rotational flow pipes of a rotational flow pipe with the phi 100mm and a rotational flow pipe with the phi 50mm is combined into medium particle components with the meshes of +325 to-80;
6. dewatering the slurry overflowing from the rotational flow pipe with the diameter of 50mm to adjust the solid content to 50%, inputting the slurry into a stirring ball mill, performing ball milling for 90 minutes, and detecting the particle size of calcium carbonate in the slurry by using a hundred-tex laser particle size analyzer, wherein D97 is approximately equal to 11.8 um;
7. transferring the ball-milled slurry to a modification reaction kettle, raising the temperature to 90 ℃, adding a silane coupling agent KH550 according to the proportion of 3% of the total mass of calcium carbonate in the slurry, wherein the modification time is 60min, and the stirring speed of the reaction kettle is 200 r/min;
8. dehydrating the modified slurry by using a horizontal screw centrifuge to obtain a filter cake with solid content of 60 percent;
9. drying the filter cake by using an experimental flash dryer, wherein the air inlet temperature is 240 ℃, the air outlet temperature is 80 ℃, and calcium carbonate functional material powder with the water content of 0.85 percent is obtained;
10. and (4) grading the dried material by using a grader (the grading granularity is set to be 8um) to obtain two calcium carbonate functional powder materials of 1000 meshes and 1500 meshes.
Example 3:
as shown in fig. 1, a method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1. weighing 100kg of artificial granite waste, and adding water to prepare slurry with the solid content of 30%;
2. removing impurities larger than 10 meshes of the prepared slurry with the solid content of 30 percent by using a polyurethane grid plate sieve dewatering screen;
3. removing impurities larger than 10 meshes from the slurry, and separating large particle components with the particle size of + 100-10 meshes through a 100-mesh rotary vibration sieve;
4. adjusting the solid content of the slurry passing through a 100-mesh rotary vibration sieve, and adding water to dilute the slurry until the solid content is 20%;
5. separating the diluted slurry by a hydrocyclone group consisting of phi 50mm and phi 25mm, firstly inputting the slurry into a phi 50mm hydrocyclone pipe, and controlling the working pressure to be 0.15 MPa; the overflow from the phi 50mm cyclone tube is used as the raw material of the phi 25mm cyclone tube, the working pressure of the phi 25mm cyclone tube is 0.3MPa, and the overflow from the phi 25mm cyclone tube is used as the raw material of the next step. Underflow of two rotational flow pipes of a phi 50mm rotational flow pipe and a phi 25mm rotational flow pipe is combined into medium particle components of +325 meshes to-100 meshes;
6. dewatering overflow slurry of a rotational flow pipe with the diameter of 25mm, adjusting the solid content to be 40%, inputting the slurry into a stirring ball mill, detecting the granularity of calcium carbonate in the slurry by a hundred-tex laser granularity meter after ball milling for 150 minutes, wherein D97 is approximately equal to 9.7 um;
7. transferring the ball-milled slurry to a modification reaction kettle, heating to 90 ℃, adding a titanate coupling agent 201 according to the proportion of 3% of the total mass of calcium carbonate in the slurry, wherein the modification time is 60min, and the stirring speed of the reaction kettle is 200 r/min;
8. dehydrating the modified slurry by using a plate-and-frame filter press to obtain a filter cake with solid content of 65 percent;
9. drying the filter cake by using an experimental spray dryer, wherein the air inlet temperature is 220 ℃, the air outlet temperature is 105 ℃, and calcium carbonate functional material powder with the water content of 0.5 percent is obtained;
10. the dried material was classified with a classifier (classification particle size was set to 6um) to obtain two calcium carbonate functional powder materials of 1250 mesh and 2000 mesh.
Example 4:
as shown in fig. 1, a method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1. weighing 100kg of artificial granite waste, and adding water to prepare slurry with solid content of 50%;
2. removing impurities larger than 10 meshes of the prepared slurry with the solid content of 30 percent by using a polyurethane grid plate sieve dewatering screen;
3. removing impurities larger than 10 meshes from the slurry, and separating large particle components with the particle size of + 100-10 meshes through a 100-mesh rotary vibration sieve;
4. adjusting the solid content of the slurry passing through a 100-mesh rotary vibration sieve, and adding water to dilute the slurry until the solid content is 20%;
5. separating the diluted slurry by using a swirler group consisting of phi 50mm, phi 25mm and phi 10mm, wherein the slurry is firstly input into a phi 50mm swirl tube, and the working pressure is 0.15 MPa; the overflow from the phi 50mm cyclone tube is used as the raw material of the phi 25mm cyclone tube, the working pressure of the phi 25mm cyclone tube is 0.3MPa, the overflow from the phi 25mm cyclone tube is used as the raw material of the phi 10mm cyclone tube, the working pressure of the phi 10mm cyclone tube is 1.0MPa, and the overflow from the phi 10mm cyclone tube is used as the raw material of the next step. Underflow of two rotational flow pipes of phi 50mm and phi 25mm is combined into medium particle components of +325 meshes to-100 meshes, and the underflow of the phi 10mm rotational flow pipe can be used as a product of 3000 meshes;
6. dewatering slurry overflowing from a rotational flow pipe with the diameter of 10mm, adjusting the solid content to be 30%, inputting the slurry into a stirring ball mill, detecting the particle size of calcium carbonate in the slurry by a hundred-tex laser particle size analyzer after ball milling for 12 hours, wherein D97 is approximately equal to 2.0 mu m;
7. transferring the ball-milled slurry or underflow slurry of a phi 10mm cyclone tube to a modification reaction kettle, raising the temperature to 50 ℃, adding a silane coupling agent (or titanate coupling agent) according to the proportion of 6 percent of the total mass of calcium carbonate in the slurry, wherein the modification time is 60min, and the stirring speed of the reaction kettle is 200 r/min;
8. dehydrating the modified slurry by using a plate-and-frame filter press to obtain a filter cake with solid content of 65 percent;
9. and drying the filter cake by using an experimental spray dryer, wherein the air inlet temperature is 220 ℃, the air outlet temperature is 105 ℃, and 3000-mesh or 6000-mesh calcium carbonate functional material powder with the water content of 0.5% is obtained.
The method can be realized by upper and lower limit values and interval values of intervals of process parameters (such as temperature, time and the like), and embodiments are not listed.
Conventional technical knowledge in the art can be used for the details which are not described in the present invention.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A method for preparing calcium carbonate functional material by using artificial granite waste comprises the following steps:
1) preparing the artificial granite waste into slurry with solid content of 10-50%, and sieving to remove large-size impurities with granularity larger than 10 meshes;
2) step 1), preparing the treated slurry into slurry with solid content of 5-50%, and sieving to remove large-particle impurities with the particle size of 80-10 meshes;
3) preparing the treated materials into slurry with solid content of 5-50%, and performing cyclone separation to obtain medium-sized particles with the particle size of 325-80 meshes;
4) preparing the materials treated in the step 3) into slurry with solid content of 5-50%, and crushing to 800-6000 meshes;
5) and 4) adding a surface modifier into the treated material to modify, dehydrating, drying and grading to obtain the calcium carbonate functional material.
2. The method as claimed in claim 1, wherein the artificial granite waste is solid waste generated in the process of producing artificial granite, and the main components thereof are marble powder, unsaturated polyester resin, cutting material scraps, and polishing material.
3. The method as claimed in claim 1, wherein in step 1), the large-sized impurities screened to remove the grain size >10 mesh are screened by a polyurethane grid screen.
4. The method according to claim 1, wherein in the step 2), a linear vibrating screen or a rotary vibrating screen is used for screening to remove large-particle impurities.
5. The method as claimed in claim 1, wherein in the step 3), the cyclone separation adopts a cyclone group consisting of cyclone tubes with the diameter of 10-200mm, and the pressure of the cyclone group during operation is 0.05-1.0 MPa.
6. The method as claimed in claim 1, wherein in the step 4), the ball mill is adopted for crushing, and the ball mill is stirred and milled by a wet method, wherein the ball milling temperature is normal temperature.
7. The method of claim 1, wherein in step 5), the surface modifier comprises one or more of sodium stearate, a titanate coupling agent, an aluminate coupling agent, a zircoaluminate coupling agent, and a silane coupling agent; the modification temperature is 50-90 ℃.
8. The method of claim 1, wherein in step 5), the dewatering is performed by a plate-and-frame filter press or a horizontal screw centrifuge.
9. The method of claim 1, wherein: in the step 5), the drying adopts a spray dryer, a flash dryer or a steam dryer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276727A (en) * | 2021-11-20 | 2022-04-05 | 广西科学院 | Waterproof and anti-fouling water-based paint based on waste artificial granite powder and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050051500A1 (en) * | 2003-09-08 | 2005-03-10 | Charah Environmental, Inc. | Method and system for beneficiating gasification slag |
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- 2021-04-23 CN CN202110442866.8A patent/CN113087006A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050051500A1 (en) * | 2003-09-08 | 2005-03-10 | Charah Environmental, Inc. | Method and system for beneficiating gasification slag |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276727A (en) * | 2021-11-20 | 2022-04-05 | 广西科学院 | Waterproof and anti-fouling water-based paint based on waste artificial granite powder and preparation method thereof |
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