CN117772382A - Fine control adjustment method for fineness of glass microsphere grinding powder - Google Patents

Abstract

The invention is applicable to the technical field of glass microbeads, and provides a method for precisely controlling and adjusting the fineness of glass microbead grinding powder, which includes the following steps: Step 1: Grinding the glass microbead grinding powder; Step 2: Grinding the glass microbead grinding powder; Once the obtained powder, water and modifier are mixed evenly; Step 3: After mixing, let it stand and then stir to obtain a slurry; Step 4: Add a dispersant to the slurry; Step 5: Disperse the slurry obtained in Step 4 and stir evenly; Step 6: Heat and stir the slurry obtained in Step 5; Step 7: Grind the slurry obtained in Step 6; Step 8: Filter the slurry obtained in Step 7 with a screen and dry it; Step 9 : The powder obtained in step eight is ground, whereby the present invention improves the surface properties of the powder through the modifier; the dispersant enables the powder particles to be dispersed more uniformly; the grinding realizes the refinement and ultra-fineness of the material. Grinding to achieve uniform particle size distribution and good fineness of the ground powder.

Description

A method for precise control and adjustment of the fineness of glass microbead grinding powder

Technical field

The invention is applicable to the technical field of glass microbeads and provides a method for precise control and adjustment of the fineness of glass microbead grinding powder.

Background technique

Glass microbeads are tiny beads with high strength, high toughness and excellent physical, chemical and optical properties, and can be used in processing processes such as grinding and polishing. Abrasive powder is a powdery material that can be used as an abrasive or polishing agent to help glass beads perform their role better.

In the grinding and polishing process, glass beads and abrasive powder are often used together. Characteristics such as particle size and hardness of the abrasive powder will affect the grinding and polishing effect, while glass beads can provide better surface finish and precision. At the same time, different combinations of glass beads and grinding powder will also produce different effects, and the appropriate combination needs to be selected according to the actual situation.

However, in actual use, the particle size of the abrasive powder is uneven, resulting in the combination of abrasive powder with different particle sizes and glass beads, resulting in poor grinding effect and poor polishing during use.

Contents of the invention

In view of the above defects, the purpose of the present invention is to provide a method for precise control and adjustment of the fineness of glass microbead grinding powder. The purpose is to solve the problems in the background, which includes the following steps:

Step 1: Grind the glass microbead powder;

Step 2: Mix the glass microbead grinding powder obtained in Step 1, water and modifier evenly. The modifier includes isooctyl alcohol ether phosphate and titanate coupling agent;

Step 3: Mix, let stand and then stir to obtain slurry;

Step 4: adding a dispersant to the slurry;

Step 5: Disperse the slurry obtained in Step 4;

Step 6: Heat and stir the slurry obtained in Step 5;

Step 7: Grinding the slurry obtained in step 6;

Step 8: Filter the slurry obtained in Step 7 with a screen and dry;

Step nine: Grind the powder obtained in step eight.

Further, in step two, the mass fraction of powder is 40-60%, the mass fraction of water is 20-40%, and the mass fraction of modifier is 10-30%.

Further, the mass fraction of the isooctyl ether phosphate in the second step is 40-60% of the modifier, and the titanate coupling agent is 40-60% of the modifier.

Further, the resting time in step three is 1 hour, and the stirring time is 30 minutes.

Further, the dispersant in step 4 is sodium phosphate, and the mass fraction of the dispersant in the slurry is 5-15%.

Further, the dispersion time in step five is 5 minutes.

Further, the temperature in step 6 is 100°C, heating is at 5°C/min, and the stirring time is 10 minutes.

Further, the equipment required for grinding in step seven is a sand mill, the inner wall material of the grinding chamber cylinder is polyurethane, 0.6-0.8mm alumina beads are used as grinding media, a liquid flow rate of 0.5L/min, 2500rpm The grinding rate is cyclic grinding for 2 hours, and the grinding temperature is 30°C.

Further, the equipment required for drying in step eight is a centrifugal atomization dryer, and the drying temperature is maintained at 40°C.

Further, the equipment required for grinding in step nine is an airflow vortex mill.

Beneficial Effects

The present invention improves the surface properties of the powder through the modifier to make it better dispersed; the dispersant enables the powder particles to be dispersed more uniformly in the medium and prevents the occurrence of agglomeration; the high-speed homogenizing emulsifier makes the substance The surface can be easily mixed with other substances; the sand mill can effectively reduce the friction loss of the material during the grinding process and improve the grinding efficiency; the alumina microbeads improve the uniformity of the grinding material and can disperse the powder; the centrifugal atomization dryer controls the product Particle size, the dried powder particles can be evenly dispersed; airflow vortex grinding realizes the refining and ultra-fine grinding of materials, achieving uniform particle size distribution of ground powder with good fineness.

Description of drawings

Figure 1 is a flow chart of the implementation of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Referring to FIG. 1 , the object of the present invention is to provide a method for finely controlling the fineness of glass microbead grinding powder, comprising the following steps:

(1) Put the glass microbead grinding powder into the grinding mill for grinding; the blade in the grinding mill shovels the material and sends it between the grinding roller and the grinding ring for grinding to achieve sufficient Grinding materials is ground by centrifugal force.

(2) Mix the ground material, water and modifier evenly. The modifier is isooctyl ether phosphate and titanate coupling agent; the titanate coupling agent can be mixed with the ground glass micron A coupling reaction occurs in the bead-milled powder, connecting the modifier molecules with the titanate coupling agent molecules. This reaction can improve the interface properties between the glass bead grinding powder and the organic polymer, improve the mechanical properties, thermal stability and weather resistance of the material, and can improve the surface properties of the powder to make it better dispersed, thus Improve the processing performance and mechanical properties of composite materials, while enhancing the fluidity of the powder; isooctyl ether phosphate is used as an active agent, and transesterification occurs with the ground glass microbead powder: isooctyl ether phosphate The molecule contains ester groups and can undergo transesterification reaction with modifiers containing hydroxyl or carboxyl groups. This reaction can connect modifier molecules with isooctyl ether phosphate molecules to form new surfactant molecules, which can reduce the interfacial tension between liquid and solid particles and prevent caking during the powder reaction. block and improve liquidity.

(3) After mixing, let it sit for 1 hour and then stir for 30 minutes to form a slurry; the process of letting it stand for 1 hour will ease the reaction, and then stir to fully mix and react the modifier and the ground material.

(4) Put a dispersant into the slurry. The dispersant is sodium phosphate Na ₃ PO _4. The mechanism of action of the sodium phosphate dispersant is to improve the surface properties of the powder material and reduce the interfacial tension between the powder particles and the liquid medium. , so that the powder particles can be dispersed more evenly in the medium while preventing the occurrence of agglomeration.

(5) Use a high-speed homogenizing emulsifier to disperse for 5 minutes and then take it out; disperse the macromolecular substances in the slurry into small molecular substances so that the surface of the substance can be easily mixed with other substances.

(6) Heat the slurry at 5°C/min, control the temperature at 100°C, stir for 10 minutes and then cool to room temperature; speed up the dissolution of the powder, make the powder have higher fluidity, and promote the dispersion and homogeneity of the powder. and mix.

(7) Use a sand mill for grinding. The sand mill is a wet mechanical grinding equipment. The inner wall material of the grinding chamber cylinder is polyurethane. Aluminum oxide beads of 0.6-0.8 mm are used as the grinding medium. The liquid flow rate is 0.5L/min. , 2500rpm grinding rate, cyclic grinding for 2 hours, grinding temperature is 30°C; polyurethane has excellent wear resistance, which can effectively reduce the friction loss of materials during the grinding process and improve grinding efficiency; alumina microbeads improve the uniformity of grinding materials , can disperse powder and improve grinding efficiency.

(8) The ground slurry is filtered through a sieve and then dried using a centrifugal atomizing dryer. The centrifugal atomizing dryer uses a high-speed rotating dispersion disk to atomize the liquid into fine droplets, which are then dried in the dryer. The centrifugal atomizing dryer is relatively easy to control the product particle size, and the powder particles can be evenly dispersed after drying.

(9) Grinding by an airflow vortex mill; the airflow vortex mill uses the vortex motion generated by high-speed airflow to strongly impact, collide and rub the materials, thereby achieving refinement and ultra-fine grinding of the materials.

Example 1:

(1) Place the glass microbead grinding powder into a grinding mill for grinding until the particle size reaches 10 microns.

(2) Mix the ground material, water and modifier evenly. The modifier is isooctyl ether phosphate and titanate coupling agent. The phosphate ester and titanate coupling agent in the modifier are The mass fractions are 40% and 60% respectively. The weight percentages of ground materials, water, and modifiers are as follows in Table 1:

Table 1 Mass fractions of different ingredients

(3) After mixing, let it stand for 1 hour and then stir it for 30 minutes to form a slurry.

(4) Put 5% by mass of dispersant into the slurry. The dispersant is sodium phosphate Na ₃ PO ₄ .

(5) Use a high-speed homogenizing emulsifier to disperse for 5 minutes and then take it out. The median particle size of the powder in the slurry is 8.1 μm.

(6) Heat the slurry at 5°C/min, control the temperature at 100°C, stir for 10 minutes and then cool to room temperature.

(7) Use a sand mill for grinding. The sand mill is a wet mechanical grinding equipment. The inner wall material of the grinding chamber cylinder is polyurethane. Aluminum oxide beads of 0.6-0.8 mm are used as the grinding medium. The liquid flow rate is 0.5L/min. , a grinding rate of 2500 rpm, cyclic grinding for 2 hours, and a grinding temperature of 30°C.

(8) The ground slurry was filtered through a 5 μm sieve, and the median particle size of the slurry was 4.5 μm. The slurry was dried using a centrifugal atomizer and the drying temperature was maintained at 40°C.

(9) Grind through an airflow vortex mill; the obtained powder is as shown in Table 2:

Table 2 Characterization results of powder

Example 2

(1) Place the glass bead powder into a grinding machine for grinding until the particle size reaches 10 microns.

(2) Mix the ground material, water and modifier evenly. The modifier is isooctyl ether phosphate and titanate coupling agent. The phosphate ester and titanate coupling agent in the modifier are The mass fractions are 50% and 50% respectively; the weight percentages of the ground material, water and modifier are as follows in Table 3:

Table 3 Mass fractions of different ingredients

(3) After mixing, let it sit for 1 hour and then stir for 30 minutes to form a slurry.

(4) Add 10% by weight of a dispersant into the slurry. The dispersant is sodium phosphate Na ₃ PO ₄ .

(5) Use a high-speed homogenizing emulsifier to disperse for 5 minutes and then take it out. The median particle size of the powder in the slurry is 7.2 μm.

(6) Heat the slurry at 5°C/min, control the temperature at 100°C, and stir for 10 minutes.

(7) Use a sand mill for grinding. The sand mill is a wet mechanical grinding equipment. The inner wall material of the grinding chamber cylinder is polyurethane. Aluminum oxide beads of 0.6-0.8 mm are used as the grinding medium. The liquid flow rate is 0.5L/min. , a grinding rate of 2500 rpm, cyclic grinding for 2 hours, and a grinding temperature of 30°C.

(8) After filtering the ground slurry with a 5 μm mesh, the median particle size of the slurry is 4.5 μm. Dry it with a centrifugal atomizer dryer and keep the drying temperature at 40°C.

(9) Grind through an airflow vortex mill; the obtained powder is as shown in Table 4:

Table 4 Characterization results of powders

Example 3

(1) Place the glass bead powder into a grinding machine for grinding until the particle size reaches 10 microns.

(2) The ground material, water and modifier are mixed evenly. The modifier is isooctyl ether phosphate and titanate coupling agent. The mass fractions of phosphate and titanate coupling agent in the modifier are 60% and 40% respectively. The weight percentages of the ground material, water and modifier are as shown in Table 5:

Table 5 Mass fractions of different components

(3) After mixing, let it stand for 1 hour and then stir it for 30 minutes to form a slurry.

(4) Put 15% mass percentage of dispersant into the slurry. The dispersant is sodium phosphate Na ₃ PO ₄ .

(5) Use a high-speed homogenizing emulsifier to disperse for 5 minutes and then take it out. The median particle size of the powder in the slurry is 7.8 μm.

(6) Heat the slurry at 5°C/min, control the temperature at 100°C, and stir for 10 minutes.

(7) Grinding with a sand mill, which is a wet mechanical grinding device. The inner wall material of the grinding chamber is polyurethane, 0.6-0.8 mm alumina microbeads are used as grinding media, the liquid flow rate is 0.5 L/min, the grinding rate is 2500 rpm, the cycle grinding is 2 hours, and the grinding temperature is 30°C.

(8) After filtering the ground slurry with a 5 μm mesh, the median particle size of the slurry is 4.5 μm. Dry it with a centrifugal atomizer dryer and keep the drying temperature at 40°C.

(9) Grind through an airflow vortex mill; the obtained powder is as shown in Table 6:

Table 6 Characterization results of powder

To sum up, the specific surface area of the powder prepared in Example 2 is 142m ² /g, the powder fineness is good, the median particle size is 2.3 μm, and the powder particle size distribution is uniform; the modifier is used to improve the powder particle size. The surface properties of the powder material make it better dispersed, thereby improving the processing performance and mechanical properties of the composite material, and at the same time enhancing the fluidity of the powder; the dispersant improves the surface properties of the powder material and reduces the interaction between the powder particles and the liquid medium. The interfacial tension enables the powder particles to be dispersed more evenly in the medium and prevents the occurrence of agglomeration; the high-speed homogenizing emulsifier disperses the macromolecular substances in the slurry into small molecule substances so that the surface of the substance can be easily Mixed with other substances; the sand mill can effectively reduce the friction loss of the material during the grinding process and improve the grinding efficiency; the alumina beads improve the uniformity of the grinding material, disperse the powder and improve the grinding efficiency; the centrifugal atomization dryer uses high-speed The rotating dispersion disk atomizes the material liquid into fine mist droplets, and then dries it in the dryer. The centrifugal atomization dryer makes it easier to control the product particle size, and the dried powder particles can be evenly dispersed; the airflow vortex grinding powder realizes the fineness of the material. chemical and ultra-fine grinding.

As a result, the device can improve the surface properties of the powder through the modifier to make it better dispersed; the dispersant enables the powder particles to be dispersed more evenly in the medium while preventing the occurrence of agglomeration; high-speed homogeneous emulsification The machine allows the surface of the substance to be easily mixed with other substances; the sand mill can effectively reduce the friction loss of the material during the grinding process and improve the grinding efficiency; the alumina microbeads improve the uniformity of the grinding material and can disperse the powder; centrifugal atomization The dryer controls the particle size of the product, and the dried powder particles can be evenly dispersed; the airflow vortex grinding mill realizes the refinement and ultra-fine grinding of the materials, achieving uniform particle size distribution and good fineness of the ground powder.

The above descriptions are merely embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any equivalent process transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims (10)

1. A method for precise control and adjustment of the fineness of glass microbead grinding powder, which is characterized by: including the following steps: Step 1: Grind the glass bead powder; Step 2: Mix the glass microbead grinding powder obtained in Step 1, water and modifier evenly. The modifier includes isooctyl alcohol ether phosphate and titanate coupling agent; Step 3: Mix, let stand and then stir to obtain slurry; Step 4: Add dispersant to the slurry; Step 5: Dispersing the slurry obtained in step 4; Step 6: Heat and stir the slurry obtained in Step 5; Step 7: Grind the slurry obtained in Step 6; Step 8: filtering the slurry obtained in step 7 through a sieve and drying; Step 9: Grind the powder obtained in Step 8. 2. The fineness precision control and adjustment method of glass microbead grinding powder according to claim 1, characterized in that the mass fraction of the powder in step two is 40-60%, and the mass fraction of water is 20-40 %, the mass fraction of modifier is 10-30%. 3. The fineness precision control and adjustment method of glass bead grinding powder according to claim 1, characterized in that the mass fraction of isooctyl alcohol ether phosphate in the second step of the modifier is 40-60%, The titanate coupling agent accounts for 40-60% of the mass fraction of the modifier. 4. The fineness fineness control and adjustment method of glass microbead grinding powder according to claim 1, characterized in that in step three, the standing time is 1 hour and the stirring time is 30 minutes. 5. The method for finely controlling the fineness of glass microbead grinding powder according to claim 1, characterized in that the dispersant in step 4 is sodium phosphate, and the mass fraction of the dispersant in the slurry is 5-15%. 6. The method for precise control and adjustment of the fineness of glass microbead grinding powder according to claim 1, characterized in that the dispersion time in step five is 5 minutes. 7. The method for precise control and adjustment of the fineness of glass bead grinding powder according to claim 1, characterized in that the temperature in step 6 is 100°C, heating is performed at 5°C/min, and the stirring time is 10 minutes. 8. The method for precise control and adjustment of the fineness of glass bead grinding powder according to claim 1, characterized in that the equipment required for grinding in step seven is a sand mill, and the inner wall material of the grinding chamber cylinder is polyurethane. Use 0.6-0.8mm alumina beads as the grinding medium, a liquid flow rate of 0.5L/min, a grinding rate of 2500rpm, and circular grinding for 2 hours. The grinding temperature is 30°C. 9. The method for precise control and adjustment of the fineness of glass bead grinding powder according to claim 1, characterized in that the equipment required for drying in step eight is a centrifugal atomization dryer, and the drying temperature is maintained at 40°C. 10. The method for precise control and adjustment of the fineness of glass bead grinding powder according to claim 1, characterized in that the equipment required for grinding in step nine is an airflow vortex mill.