CN117756501A - High-abrasion ratio fine grinding polishing block and preparation method thereof - Google Patents
High-abrasion ratio fine grinding polishing block and preparation method thereof Download PDFInfo
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- 238000000227 grinding Methods 0.000 title claims abstract description 106
- 238000005498 polishing Methods 0.000 title claims abstract description 100
- 238000005299 abrasion Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 71
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 37
- 239000010431 corundum Substances 0.000 claims abstract description 17
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 14
- 239000010433 feldspar Substances 0.000 claims abstract description 12
- 239000010453 quartz Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims description 80
- 238000005245 sintering Methods 0.000 claims description 47
- 238000002156 mixing Methods 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 20
- 238000005096 rolling process Methods 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 11
- 239000005995 Aluminium silicate Substances 0.000 claims description 10
- 235000012211 aluminium silicate Nutrition 0.000 claims description 10
- 238000005336 cracking Methods 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 7
- 230000005496 eutectics Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000012798 spherical particle Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000004005 microsphere Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910000997 High-speed steel Inorganic materials 0.000 abstract description 2
- 230000001133 acceleration Effects 0.000 abstract description 2
- 239000004927 clay Substances 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention provides a high-abrasion ratio fine grinding polishing block and a preparation method thereof, and relates to the technical field of polishing block preparation. The high abrasion ratio fine grinding polishing block comprises the following components in parts by weight: 20-60 parts of chrome corundum micropowder, 10-40 parts of alumina micropowder, 5-30 parts of feldspar powder, 10-40 parts of clay powder, 5-20 parts of quartz micropowder and 1-5 parts of other materials. Under the working condition that the impact acceleration is 10g and the linear speed is more than 1.2m/s, the 45 steel rough grinding surface can be processed from Ra0.8 to Ra0.13 or below in 30mi, ra0.3 to Ra0.1 or below, the removal rate is more than 0.2%, the material rough grinding surface of high-speed steel alloy steel or other materials can be grinded from Ra0.4 to Ra0.1 or below in 30mi, the material removal rate can be more than 0.15%, the high-speed grinding machine has the characteristics of high grinding force, high abrasion ratio, high grinding quality and the like, is suitable for high-linear speed high-speed grinding and polishing application scenes, can greatly improve the processing efficiency, improve the processing quality, simplify the working procedure, reduce the loss and the auxiliary time, and further ensure the mechanical production automation.
Description
Technical Field
The invention relates to the technical field of polishing and grinding block preparation, in particular to a high-abrasion-ratio fine grinding polishing and grinding block and a preparation method thereof.
Background
Most ceramic bond polishing blocks in the industry at present are divided into corundum polishing blocks, ceramic polishing blocks, high-aluminum ceramic polishing blocks, high-frequency ceramic polishing blocks, silicon carbide polishing blocks and the like according to industry practice. Wherein, the corundum polishing and grinding block generally adopts a bonding agent system of clay quartz feldspar, and the sintering temperature is about 1200 ℃; the hardness of the sintered grinding tool is generally low and the sand content is difficult to exceed 30 percent due to the limitation of the binding agent and the sintering temperature; the common grinding force is low, the abrasion is large, and the grinding limit is about Ra0.2. The final sintered finished products of the ceramic polishing blocks, the high-aluminum ceramic polishing blocks and the high-frequency ceramic polishing blocks have the advantages of over-high strength, almost no grinding force, no self sharpening, no grinding tool attribute, and general application in polishing application, the silicon carbide polishing blocks are limited by carbide, the sintering temperature is not higher than 850 ℃, the hardness of the sintered grinding tool is lower than that of corundum, the grinding force is high, the abrasion is extremely high, the abrasion ratio is extremely low, and the ceramic polishing blocks are only used in the field of special coarse grinding requirements and cannot be used in the field of automatic application.
The traditional mixing process adopts a spiral stirrer for dry mixing or a stirrer for semi-wet mixing, the mixing uniformity of raw materials is insufficient, the plasticity is poor, and the internal tissues of the polished products are uneven; the filler of the corundum polishing block sintered by the ceramic bond is generally lower than 600 meshes, and the sand content is generally lower than 20 percent; the low sand content, low mesh number and uneven tissue structure lead to the fact that the traditional product has very big bottlenecks in grinding quality, grinding state application range, grinding efficiency and grinding limit value, and especially cannot meet the precision machining requirement of performance parts in the aspect of precision grinding and polishing below Ra0.2.
At present, the whole barreling polishing technology industry, the development route of the technology is developed towards the directions of high speed, automation and batch production, the high linear speed and high impact pressure become more and more main working conditions, and the requirements on the performance, the stability of the polishing quality and the abrasion (auxiliary time interval) of polishing blocks are higher and higher. The invention relates to a high abrasion ratio fine grinding polishing block and a preparation method thereof, which realize the aims of high grinding force, high grinding quality, low abrasion (less than or equal to 3.5 percent/h), stable grinding quality and wide application range (the surface states of performance parts are all applicable to Ra0.2-0.8) of polishing block products.
Disclosure of Invention
(one) solving the technical problems
The invention aims to solve the problems of the prior art and provides a high-abrasion-ratio fine grinding polishing block and a preparation method thereof. The grinding machine has the characteristics of high grinding limit value (Ra is less than or equal to 0.1), high grinding force exceeding that of the traditional coarse grinding product, low abrasion (less than or equal to 3.5 percent/h, 3mm ball-shaped product example), stable grinding quality and wide application range (the surface state of the performance part is Ra0.2-0.8).
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the high abrasion ratio fine grinding polishing block comprises the following components in parts by weight:
preferably, a preferable technical scheme of the high abrasion ratio fine grinding polishing block and the preparation method comprises
The composition comprises the following components in parts by weight:
preferably, the preparation method of the spherical product with high abrasion ratio and accurate grinding polishing blocks and the preparation method comprises the following steps:
s1, raw material co-grinding
Taking 40 parts of chrome corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others, putting into a ball mill, and carrying out raw material co-grinding for 8-16 h;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, spray granulation
Adding slurry into a spray granulation tower through a diaphragm pump, cooling slurry spray by rising hot air in the sinking process, and forming spherical raw materials with the diameter of about 0.1 mm-0.3;
s4, rolling ball forming
Rolling the spherical particle raw material into balls by a ball rolling machine to obtain spherical blanks. In the preparation process, the dimension consistency is ensured by measuring and screening in time; the whole process is uninterrupted, so that the consistency of the ball forming from inside to outside is ensured;
s5, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s6, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1450 ℃;
s7, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
Preferably, the preparation method of the segment-type product of the high abrasion ratio fine grinding polishing block and the preparation method comprises the following steps:
s1, raw material co-grinding
Taking 40 parts of chrome corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others, putting into a ball mill, and carrying out raw material co-grinding for 8-16 h;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, extruding mud cakes
Squeezing the slurry through a filter press, and extruding water to form a mud cake raw material with uniform material quality;
s4, vacuum pugging
Adding the mud cake raw material into a vacuum pugging machine for vacuum pugging, removing micro bubbles and partial moisture, wherein the vacuum pressure is less than-0.1 MPa;
s5, manufacturing and forming
Extruding the raw materials obtained by vacuum pugging through a hydraulic extruder to form strips, and cutting by a cutting machine to obtain blanks in the shape of finished products. The cross section of the hole can be designed into various shapes such as a circle, a square, a triangle, a diamond and the like and different sizes according to the requirements; the length of the blank can be controlled by the sectioning machine;
s6, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s7, sintering
And (5) loading the dried ball-shaped polishing blocks into a sagger, and sintering according to a sintering system. The bottom of the sagger and the polishing blocks are paved with heat-insulating alumina powder, and the highest sintering temperature is 1350-1400 ℃;
s8, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
Preferably, the highest sintering temperature is 1350-1450 ℃ which is higher than the temperature of 1200-1250 ℃ in the industry, so that the binding agent is ensured to have extremely high physical properties, such as higher hardness, particle breakage strength and wear resistance.
Preferably, 10-40 parts of alumina micropowder and 1.5-10 mu m form eutectic with the bonding agent in the firing process, and the eutectic serves as abrasive to improve grinding force and bonding agent to improve hardness and refractoriness of the bonding agent.
Preferably, 20-60 parts of chrome corundum micro powder and 600-2000 meshes are adopted, and the optimal scheme content reaches 40%, so that the grinding force, the grinding quality and the durability are ensured.
Preferably, 1-5 parts of other materials are added, and eutectic substances are formed with the raw materials in the firing process, so that the toughness and strength of the product are further improved, and the grinding force, wear resistance and particle breakage strength are improved.
Preferably, a raw material co-grinding process and a raw material water mixing and dispersing process are adopted, so that the raw materials are further fully refined, and meanwhile, the mixing uniformity of the raw materials is ensured.
Preferably, the microsphere type raw material powder with high fluidity and nearly uniform size is obtained by adopting raw material water mixing dispersion and spray granulation processes, has extremely strong molding, and ensures the roundness, uniformity and compactness of the ball molding.
Preferably, a process of mixing, dispersing and extruding raw materials into mud cakes is adopted to obtain uniform mud cake raw materials, so that the uniformity and compactness of the follow-up raw materials are ensured.
(III) beneficial effects
The invention provides a high-abrasion ratio fine grinding polishing block and a preparation method thereof. The beneficial effects are as follows:
1. the invention adopts the raw material co-grinding process and the raw material water mixing dispersing process to ensure the mixing uniformity of the raw materials while further fully refining the raw materials, adopts the raw material water mixing dispersing and spray granulating process to obtain microsphere-type raw material powder with high fluidity and nearly uniform size, has extremely strong molding property, ensures the roundness, uniformity and compactness of rolling ball molding, and adopts the raw material water mixing dispersing and mud cake extruding processes to obtain uniform and consistent mud cake raw materials, thereby ensuring the uniformity and compactness of the subsequent raw materials.
2. According to the invention, through the sintering at the highest temperature of 1350-1400 ℃ and at the temperature higher than the temperature of 1200-1250 ℃ in the industry, the binding agent is ensured to have extremely high physical properties, and has the physical properties of higher hardness, particle breakage strength and wear resistance, 10-40 parts of alumina micropowder forms eutectic with the binding agent in the sintering process, the alumina micropowder serves as abrasive to improve grinding force and also serves as the binding agent to improve hardness, meanwhile, the refractoriness of the binding agent is improved, 20-60 parts of chromia micropowder is added, and the optimal scheme content reaches 40%, so that grinding force, grinding quality and durability are ensured, other 1-5 parts of alumina micropowder are added, and the eutectic is formed with raw materials in the sintering process, so that the toughness and strength of the product are further improved, and the grinding force, wear resistance and particle breakage strength are improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the embodiment of the invention provides a high-abrasion ratio fine grinding polishing block and a preparation method thereof, wherein the high-abrasion ratio fine grinding polishing block comprises the following components in parts by weight:
the preparation method of the spherical product with high abrasion ratio and accurate grinding polishing blocks and the preparation method comprises the following steps:
s1, raw material co-grinding
Taking 20 parts of chrome corundum micro powder, 10 parts of alumina micro powder, 5 parts of feldspar powder, 10 parts of kaolin powder, 5 parts of quartz powder and 1 part of other materials, putting the materials into a ball mill, and carrying out raw material co-grinding for 8 hours;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, spray granulation
Adding slurry into a spray granulation tower through a diaphragm pump, cooling slurry spray by rising hot air in the sinking process, and forming spherical raw materials with the diameter of about 0.1 mm;
s4, rolling ball forming
Rolling the spherical particle raw materials into balls by a ball rolling machine to obtain spherical blanks, wherein the dimensional consistency is ensured by measuring and screening in time in the preparation process; the whole process is uninterrupted, so that the consistency of the ball forming from inside to outside is ensured;
s5, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s6, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1450 ℃;
s7, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
The preparation method of the segment-type product of the high abrasion ratio fine grinding polishing block and the preparation method comprises the following steps:
s1, raw material co-grinding
Taking 40 parts of chrome corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others, putting into a ball mill, and carrying out raw material co-grinding for 8-16 h;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, extruding mud cakes
Squeezing the slurry through a filter press, and extruding water to form a mud cake raw material with uniform material quality;
s4, vacuum pugging
Adding the mud cake raw material into a vacuum pugging machine for vacuum pugging, and removing micro bubbles and partial water; the vacuum pressure is less than-0.1 MPa;
s5, manufacturing and forming
Extruding the raw materials obtained by vacuum pugging through a hydraulic extruder to form strips, and cutting by a cutting machine to obtain blanks in the shape of finished products. The cross section of the hole can be designed into various shapes such as a circle, a square, a triangle, a diamond and the like and different sizes according to the requirements; the length of the blank can be controlled by the sectioning machine;
s6, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s7, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1400 ℃;
s8, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
According to the spherical product example with the diameter of 3mm, which is produced by the high abrasion ratio fine grinding polishing block and the preparation method, according to the preferred scheme, under the working condition that the impact acceleration is 10g and the linear speed is more than 1.2m/s, the 45 steel rough grinding surface can be processed from Ra0.8 to Ra0.13 or below and Ra0.3 to Ra0.1 or below within 30 min; the removal rate exceeds 0.2%, the rough grinding surface of materials such as high-speed steel alloy steel reaches less than Ra0.1 from Ra0.4 within 30 min, the material removal rate can exceed 0.15%, the abrasion of the product is lower than 3.5%/h, and the particle breakage strength exceeds 800 N.M. The roughness limit of the ceramic bond brown fused alumina type 3mm diameter polishing block with better quality in the comparative industry is more than or equal to Ra0.23, the abrasion is more than or equal to 7 percent/h, and the grinding force is less than or equal to 0.1 percent. The high-abrasion ratio fine grinding polishing block and the preparation method thereof disclosed by the invention have the characteristics of high grinding force, high abrasion ratio, high grinding quality and the like, are suitable for high-linear-speed high-speed polishing application scenes, can greatly improve the processing efficiency, improve the processing quality, simplify the working procedure, reduce the loss and the auxiliary time, and further ensure the automation of mechanical production.
According to the first embodiment:
the invention relates to a high abrasion ratio fine grinding polishing block and a technical scheme for comparison of a preparation method, which comprises the following components in parts by weight:
the invention relates to a preparation method of a high abrasion ratio fine grinding polishing block spherical product, which comprises the following steps:
s1, raw material co-grinding
Putting 40 parts of brown corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder and 8 parts of quartz powder into a ball mill, and carrying out raw material co-grinding for 8-16 hours;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3 spray granulation
Adding slurry into a spray granulation tower through a diaphragm pump, cooling slurry spray by rising hot air in the sinking process, and forming spherical raw materials with the diameter of about 0.1 mm-0.3;
s4, rolling ball forming
Rolling the spherical particle raw materials into balls by a ball rolling machine to obtain spherical blanks, and measuring and screening in time in the preparation process; the whole process is uninterrupted, so that the consistency of the ball forming from inside to outside is ensured;
s5, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s6, sintering
And (5) loading the dried ball-shaped polishing blocks into a sagger, and sintering according to a sintering system. The bottom of the sagger and the space between the polishing blocks are paved with heat-insulating alumina powder, and the highest temperature of firing is 1350-1450 ℃;
s7, processing
Placing the sintered ball-shaped polishing blocks into a centrifuge for treatment, and removing impurities adhered to the surface layer and alumina powder of each layer
The invention relates to a preparation method of a high abrasion ratio fine grinding polishing block section type product, which comprises the following steps:
s1, raw material co-grinding
Putting 40 parts of brown corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder and 8 parts of quartz powder into a ball mill, and carrying out raw material co-grinding for 8-16 hours;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, extruding mud cakes
Squeezing the slurry through a filter press, and extruding water to form a mud cake raw material with uniform material quality;
s4, vacuum pugging
Adding the mud cake raw material into a vacuum pugging machine for vacuum pugging, and removing micro bubbles and partial water; the vacuum pressure is less than-0.1 MPa;
s5, manufacturing and forming
Extruding the raw materials obtained by vacuum pugging through a hydraulic extruder to form strips, and cutting by a cutting machine to obtain blanks in the shape of finished products. The cross section of the hole can be designed into various shapes such as a circle, a square, a triangle, a diamond and the like and different sizes according to the requirements; the length of the blank can be controlled by the sectioning machine;
s6, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s7, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1400 ℃;
s8, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
Through 3mm spherical and 2 x 2 regular triangle section type sample preparation tests, the grinding limit value of a sample aiming at a Ra0.6 basic 45 steel test sample block is about Ra0.2 and 0.25 respectively, the basic texture removal effect is poor, and the grinding force is insufficient; the surface of the processed sample block is bright; grinding force attenuation occurs after 6 hours of use, and the self-sharpening property is insufficient.
Comparative example two:
the invention relates to a high abrasion ratio fine grinding polishing block and a technical scheme for comparison of a preparation method, which comprises the following components in parts by weight:
the invention relates to a preparation method of a high abrasion ratio fine grinding polishing block spherical product, which comprises the following steps:
s1, mixing materials
40 parts of chrome corundum micro powder, 20 parts of alumina micro powder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others are put into a conical mixer for raw material mixing;
s2, rolling ball forming
Rolling the spherical particle raw materials into balls by a ball rolling machine to obtain spherical blanks, and measuring and screening in time in the preparation process; the whole process is uninterrupted, so that the consistency of the ball forming from inside to outside is ensured;
s3, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s4, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1450 ℃;
s5, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
The invention relates to a preparation method of a high abrasion ratio fine grinding polishing block section type product, which comprises the following steps:
s1, mixing materials
40 parts of chrome corundum micro powder, 20 parts of alumina micro powder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others are put into a conical mixer for raw material mixing;
s2, mud making
Putting the raw materials into a stirrer, adding water, and preparing mud balls;
s3, vacuum pugging
Adding the mud dough into a vacuum pugging machine for vacuum pugging, and removing micro bubbles and partial water; the vacuum pressure is less than-0.1 MPa;
s4, manufacturing and forming
Extruding the raw materials obtained by vacuum pugging through a hydraulic extruder to form strips, and cutting by a cutting machine to obtain blanks in the shape of finished products. The section of the hole can be designed into various shapes such as a circle, a square, a triangle, a diamond and the like and different sizes according to the requirements, and the length of the blank can be controlled by the cutting machine;
s5, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s6, sintering
And (5) loading the dried ball-shaped polishing blocks into a sagger, and sintering according to a sintering system. The bottom of the sagger and the polishing blocks are paved with heat-insulating alumina powder, and the highest sintering temperature is 1350-1400 ℃;
s7, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
Through 3mm ball-shaped and 2X 2 regular triangle section type sample preparation tests, the grinding limit value of a sample aiming at a Ra0.6 basic 45 steel test sample block is about Ra0.15 and 0.2 respectively, the abrasion is higher, the abrasion exceeds 4.5%/h and 5%/h respectively, and fine scratches exist on the surface of the processed sample block.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (11)
1. The high abrasion ratio fine grinding polishing block and the preparation method thereof are characterized by comprising the following components in parts by weight:
。
2. the preferable technical scheme of the high abrasion ratio fine grinding polishing block and the preparation method according to claim 1 is characterized by comprising the following components in parts by weight:
。
3. the method for preparing a spherical product of a high abrasion ratio fine grinding polishing block and a preparation method according to claim 1 or 2, comprising the steps of:
s1, raw material co-grinding
Taking 40 parts of chrome corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others, putting into a ball mill, and carrying out raw material co-grinding for 8-16 h;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, spray granulation
Adding slurry into a spray granulation tower through a diaphragm pump, cooling slurry spray by rising hot air in the sinking process, and forming spherical raw materials with the diameter of about 0.1 mm-0.3;
s4, rolling ball forming
Rolling the spherical particle raw material into balls by a ball rolling machine to obtain spherical blanks. In the preparation process, the dimension consistency is ensured by measuring and screening in time; the whole process is uninterrupted, so that the consistency of the ball forming from inside to outside is ensured;
s5, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s6, sintering
Loading the dried spherical polishing blocks into a sagger, sintering according to a sintering system, laying heat-insulating alumina powder between the bottom of the sagger and the polishing blocks, and sintering at a highest temperature of 1350-1450 ℃;
s7, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
4. The method for producing a segment product of a high abrasion ratio fine grinding polishing block and a method for producing the same according to claim 1 or 2, comprising the steps of:
s1, raw material co-grinding
Taking 40 parts of chrome corundum micropowder, 20 parts of alumina micropowder, 10 parts of feldspar powder, 20 parts of kaolin powder, 8 parts of quartz powder and 2 parts of others, putting into a ball mill, and carrying out raw material co-grinding for 8-16 h;
s2, mixing and dispersing the raw materials in water
The mixed micro powder is put into an aqueous solution of a stirring tank for slurry mixing and decomposition, wherein a certain amount of dispersing agent is added into water to facilitate dispersion; mixing and dispersing for more than 24 hours, and further decomposing for more than 48 hours;
s3, extruding mud cakes
Squeezing the slurry through a filter press, and extruding water to form a mud cake raw material with uniform material quality;
s4, vacuum pugging
Adding the mud cake raw material into a vacuum pugging machine for vacuum pugging, and removing micro bubbles and partial water; the vacuum pressure is less than-0.1 MPa;
s5, manufacturing and forming
Extruding the raw materials obtained by vacuum pugging through a hydraulic extruder to form strips, and cutting by a cutting machine to obtain blanks in the shape of finished products. The cross section of the hole can be designed into various shapes such as a circle, a square, a triangle, a diamond and the like and different sizes according to the requirements; the length of the blank can be controlled by the sectioning machine;
s6, drying
Drying the formed ball-shaped polishing blocks, and gradually heating to avoid cracking for 24-36 hours;
s7, sintering
And (5) loading the dried ball-shaped polishing blocks into a sagger, and sintering according to a sintering system. The bottom of the sagger and the polishing blocks are paved with heat-insulating alumina powder, and the highest sintering temperature is 1350-1400 ℃;
s8, processing
And (3) putting the sintered spherical polishing blocks into a centrifugal machine for treatment, and removing the surface sticky impurities and the alumina powder of each layer.
5. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 1 or 2, wherein the method comprises the following steps: the highest sintering temperature is 1350-1450 ℃ which is higher than the temperature of 1200-1250 ℃ in the industry, so that the binding agent is ensured to have extremely high physical properties, and has higher hardness, particle breakage strength and physical properties of wear resistance.
6. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 1 or 2, wherein the method comprises the following steps: 10-40 parts of alumina micropowder and 1.5-10 mu m, and forms eutectic with the bonding agent in the firing process, thereby serving as abrasive to improve grinding force and bonding agent to improve hardness and simultaneously improving refractoriness of the bonding agent.
7. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 1 or 2, wherein the method comprises the following steps: 20-60 parts of chrome corundum micro powder, 600-2000 meshes, and the optimized scheme content reaches 40%, thereby ensuring the grinding force, the grinding quality and the durability.
8. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 1 or 2, wherein the method comprises the following steps: and 1-5 parts of other materials are added, and eutectic substances are formed with the raw materials in the firing process, so that the toughness and strength of the product are further improved, and the grinding force, wear resistance and particle breakage strength are improved.
9. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 1 or 2, wherein the method comprises the following steps: adopts a raw material co-grinding process and a raw material water mixing and dispersing process, so that the raw materials are further fully refined, and meanwhile, the mixing uniformity of the raw materials is ensured.
10. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 3 or 4, wherein the method comprises the following steps: the microsphere type raw material powder with high fluidity and nearly consistent size is obtained by adopting the raw material water mixing dispersion and spray granulation process, has extremely strong molding and ensures the roundness, uniformity and compactness of the rolling ball molding.
11. The high abrasion ratio fine grinding polishing block and the preparation method thereof according to claim 4, wherein the high abrasion ratio fine grinding polishing block is characterized in that: the mud cake raw materials are obtained by adopting the raw material water mixing dispersing and mud cake extruding processes, so that the uniformity and compactness of the follow-up raw materials are ensured.
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