CN105563363A - Method for preparing ceramic bond stacking abrasive material through centrifugal drying granulation technology - Google Patents
Method for preparing ceramic bond stacking abrasive material through centrifugal drying granulation technology Download PDFInfo
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Abstract
The invention provides a method for preparing a ceramic bond stacking abrasive material through a centrifugal drying granulation technology. The method is characterized in that an abrasive material and ceramic bond powder composed of silicon oxide powder, aluminum oxide powder, lithium carbonate powder, sodium carbonate powder, boric acid powder and zirconium oxide powder are adopted as the raw materials, mixed slurry is obtained by adding deionized water and dextrin liquid into the raw materials, stacking abrasive material fresh pellets are obtained through centrifugal drying, and the ceramic bond stacking abrasive material can be obtained through calcination. The abrasive material can be evenly wrapped and high bonding force can be generated through the liquid phase formed after the powder bond in the stacking abrasive material is fused. The spherical stacking abrasive material prepared through the method has the characteristics of the uniform particle granularity and the uniform organization structure, and can be used for preparing abrasive cloth, abrasive belts and resin bond grinding wheels. The abrasive belts prepared from the ceramic bond stacking abrasive material have the characteristics of being high in grinding efficiency, good in self-sharpening performance and grinding heat dissipation and long in service life; automatic production can be easily achieved through the technology.
Description
Technical field
The present invention relates to a kind of preparation method utilizing centrifugal drying granulating technique to prepare vitrified bond accumulation abrasive material.
Background technology
Abrasive band be use binding agent abrasive material is bonded in flexible material is made can grinding, polishing banded instrument, its form three elements be: base material, abrasive material and binding agent.Owing to using the manufacture of ordinary construction abrasive material, there is following drawback: (1) individual layer abrasive material abrasive band working lining is thin, and service life is short, and utilization rate is low in the abrasive band of current use, changes frequently and reduce production efficiency, improve the labour intensity of operator; (2) on abrasive band, between abrasive particle, gap is less, and in grinding process, abrasive dust can remain in surface, abrasive band and results in blockage, and frictional heating increases, and workpiece is easily burnt; (3) conventional monolayers abrasive band is in grinding process, after the abrasive material of blunt comes off, causes the friction between binding agent and workpiece, makes abrasive band not continue steady operation; (3) conventional monolayers abrasive particle abrasive band, the state of abrasive particle in grinding process and grinding force different, therefore cause grinding workpiece surface quality to differ greatly, and individual layer abrasive band to be changed in grinding process frequently, make seam crossing workpiece grinding quality obviously inconsistent; (4) in the preparation process of abrasive band, fine granularity abrasive material makes abrasive band plant sand difficulty because of problems such as reunions, plants sand uniformity and is difficult to be guaranteed; (5) traditional multilayer implantation process of sand can not meet the softness requirements in abrasive band.(6) the preparation process Raw of existing accumulation abrasive material often adopts mechanical mixture, one is easily produce reunion when feed particles is thinner, two is that bonding agent is when differing larger with abrasive material size, both are difficult to mix, the non-homogeneous microstructure centered by bonding agent can be formed, cause easily producing cut to surface of the work in grinding process, affect precision and the surface roughness of workpiece.
Summary of the invention
Above-mentionedly above-mentioned abrasive band manufacture abrasive material the deficiencies in the prior art are applied in order to overcome, the invention provides one utilize centrifugal drying granulating technique to prepare grinding efficiency is high, self-sharpening good, utilization rate is high, the life-span is long, grinding surface quality is even, and the method for abrasive material piled up by the vitrified bond being applicable to automated production.
Feature of the present invention is: by vitrified bond, tiny abrasive material is prepared into spheric granules larger-size, of uniform size-accumulation abrasive material.This accumulation abrasive material can adopt conventional fabrication techniques to make abrasive band, has the feature that self-sharpening is good, the life-span is long, grinding efficiency is high in sbrasive belt grinding process prepared by the method.This accumulation abrasive material also can be used for preparing resin bond wheel, increases substantially heat resistance and the grinding efficiency of emery wheel.
Technical solution of the present invention is as follows:
Utilize centrifugal drying granulation process vitrified bond to pile up a method for abrasive material, comprise the steps:
1) preparation of vitrified bond: the powder such as silica, aluminium oxide, lithium carbonate, sodium carbonate, boric acid, zirconia are added in ball milling altar according to certain ratio, batch mixing 3h on ball mill, the mixed powder made is after high melt, chilling, ball mill crushing, cross 325 mesh sieves, obtain low melting point vitrified bond powder; Wherein in bonding agent, each constituent mass percentage composition is aluminium oxide 5 ~ 9%, silica 48 ~ 54%, sodium carbonate 5 ~ 10%, zirconia 2 ~ 5%, lithium carbonate 3 ~ 6%, boric acid 20 ~ 26%;
2) preparation of slurry: with corundum or silicon carbide abrasive and vitrified bond for raw material, after adding deionized water and dextrin liquid, then be mixed and made into slurry through ball milling.Wherein, in siccative, abrasive material mass ratio is 85 ~ 95%, the mass ratio 5 ~ 15% of bonding agent;
3) granulation: by step 2) in the slurry that mixes carry out centrifugal drying granulation, obtain piling up abrasive material green-ball;
4) calcine: by step 3) in obtain green-ball drying, calcining, can obtain vitrified bond pile up abrasive material.
Described vitrified bond piles up abrasive grain homogeneous grain diameter, uniform texture, and the liquid phase of piling up bonding agent melting generation in abrasive material is wrapped up better corundum or silicon carbide abrasive, cohesive force is stronger.
Described corundum or silicon carbide abrasive granularity are W40 ~ W0.5.
The solid content of described slurry is at 45 ~ 60wt%, and during ball milling, the mass ratio of abrading-ball and powder is 2: 1, and Ball-milling Time is 2 ~ 5h, and the rotating speed of ball mill is 300 ~ 500rpm.
Described granulation mode is centrifugal drying comminution granulation.The centrifugal pan diameter of centrifuge is 120mm, rotating speed 200 ~ 250rpm, time dry, and temperature of inlet air 200 ~ 240 DEG C, outlet temperature 100 ~ 120 DEG C.
The heating rate of described calcine technology at 2 ~ 7 DEG C/min, maximum temperature 720 ~ 780 DEG C, temperature retention time 45 ~ 80min.
The particle size of the vitrified bond accumulation abrasive grain of gained is 0.3 ~ 1.2mm.
An abrasive material piled up by the vitrified bond utilizing centrifugal drying granulating technique to prepare, and is prepared from by said method.
The invention has the beneficial effects as follows:
(1) each composition is prepared into slurry, each composition can be made to be mixed more uniformly;
(2) in liquid phase slurry, abrasive material is evenly wrapped up by vitrified bond powder, is conducive to improving bonding agent to the hold of abrasive material after calcining, realizes the uniformity of pelletizing internal organizational structure simultaneously;
(3) centrifugal drying prilling process operation is simple, slurry fluidity stable, is beneficial to and realizes automated production;
(4) the accumulation abrasive material of gained is spherical particle, epigranular, good fluidity, not easily reunites;
(5) vitrified bond piles up that the pyroconductivity of benefit ceramic powder that abrasive material is used for preparing in abrasive band is high, good heat resistance can realize at a high speed, high-rate grinding; Also can improve the grinding accuracy in abrasive band simultaneously, reduce the surface roughness value of grinding workpiece;
(6) compared to conventional monolayers abrasive material abrasive band, the grinding thickness of abrasive material piled up by vitrified bond, and long service life, grinding efficiency are high, and can realize the roughness of automated production and guarantee surface of the work uniformity;
(7) vitrified bond is piled up abrasive material and is overcome fine granularity abrasive material and plant sand difficulty and multilayer plants the problem of abrasive band pliability difference prepared by sand.
Accompanying drawing explanation
Fig. 1 is that abrasive material micro-structure diagram piled up by vitrified bond prepared by centrifugal drying granulating technique;
Fig. 2 is that abrasive material abrasive band optical photograph piled up by vitrified bond prepared by centrifugal drying granulating technique;
M-material removal amount graph of a relation when Fig. 3 is sbrasive belt grinding.
Detailed description of the invention
Below in conjunction with concrete example, invention is described in detail:
Embodiment 1
The raw material that the present invention prepares the employing of vitrified bond accumulation abrasive material has: corundum (granularity: W32), aluminium oxide, silica, sodium carbonate, zirconia, lithium carbonate, boric acid, and vitrified bond proportioning is as shown in the table:
| Component | Aluminium oxide | Silica | Sodium carbonate | Zirconia | Lithium carbonate | Boric acid |
| Proportioning/wt% | 9 | 52 | 8 | 2 | 3 | 26 |
According to aforementioned proportion, silica, aluminium oxide, lithium carbonate, sodium carbonate, boric acid, zirconia are added in ball milling altar, batch mixing 3h on ball mill, mixed powder, after high melt, chilling, ball mill crushing, is crossed 325 mesh sieves, is obtained low melting point vitrified bond powder.Vitrified bond 0.4kg, 6.0kg deionized water and dextrin liquid 0.5kg wet ball grinding mixing 3h under the rotating speed of 300rpm is added respectively in 4.6kg corundum.Obtained slip obtains vitrified bond through centrifugal drying granulation and piles up abrasive material, and centrifugal rotational speed is 240rpm, and temperature of inlet air is 200 DEG C, and outlet temperature is 100 DEG C.Dried accumulation abrasive material is calcined, and heating rate is 3 DEG C/min, and at 750 DEG C of insulation 1h.The average grain diameter that centrifugal drying granulation gained piles up abrasive material is 480 μm.
Embodiment 2
The raw material that the present invention prepares the employing of vitrified bond accumulation abrasive material has: corundum (granularity: W32), aluminium oxide, silica, sodium carbonate, zirconia, lithium carbonate, boric acid, and vitrified bond proportioning is as shown in the table:
| Component | Aluminium oxide | Silica | Sodium carbonate | Zirconia | Lithium carbonate | Boric acid |
| Proportioning/wt% | 9 | 52 | 8 | 2 | 3 | 26 |
According to aforementioned proportion, silica, aluminium oxide, lithium carbonate, sodium carbonate, boric acid, zirconia are added in ball milling altar, batch mixing 3h on ball mill, mixed powder, after high melt, chilling, ball mill crushing, is crossed 325 mesh sieves, is obtained low melting point vitrified bond powder.Vitrified bond 0.4kg, 5kg deionized water and dextrin liquid 0.5kg wet ball grinding mixing 4h under the rotating speed of 350rpm is added respectively in 4.6kg corundum abrasive.Obtained slip obtains vitrified bond through centrifugal drying granulation and piles up abrasive material, and centrifugal rotational speed is 220rpm, and temperature of inlet air is 220 DEG C, and outlet temperature is 110 DEG C.Dried accumulation abrasive material is calcined, and heating rate is 4 DEG C/min, and at 760 DEG C of insulation 1h.The average grain diameter that centrifugal drying granulation gained piles up abrasive material is 550 μm.
Embodiment 3
The raw material that the present invention prepares the employing of vitrified bond accumulation abrasive material has: green silicon carbide (granularity: W32), aluminium oxide, silica, sodium carbonate, zirconia, lithium carbonate, boric acid, and vitrified bond proportioning is as shown in the table:
| Component | Aluminium oxide | Silica | Sodium carbonate | Zirconia | Lithium carbonate | Boric acid |
| Proportioning/wt% | 9 | 52 | 8 | 2 | 3 | 26 |
According to aforementioned proportion, silica, aluminium oxide, lithium carbonate, sodium carbonate, boric acid, zirconia are added in ball milling altar, batch mixing 3h on ball mill, mixed powder, after high melt, chilling, ball mill crushing, is crossed 325 mesh sieves, is obtained low melting point vitrified bond powder.Vitrified bond 0.4kg, 4.0kg deionized water and dextrin liquid 0.5kg wet ball grinding mixing 5h under the rotating speed of 400rpm is added respectively in 4.6kg corundum.Obtained slip obtains vitrified bond through centrifugal drying granulation and piles up abrasive material green-ball, and centrifugal rotational speed is 200rpm, and temperature of inlet air is 240 DEG C, and outlet temperature is 120 DEG C.The average grain diameter of the made accumulation abrasive material of centrifugal drying granulation is 630 μm.Dried accumulation abrasive material green-ball, calcines, and heating rate is 5 DEG C/min, and at 760 DEG C of insulation 1h.Abrasive material piled up by obtained vitrified bond, and the vitrified bond utilizing this to prepare is piled up abrasive material and made abrasive band product and conventional abrasive material abrasive band and external import and pile up abrasive sand band and carry out grinding contrast.Grinding object is 45# steel pipe (Φ 10cm × 100cm).Grinding data as shown in Figure 3, as can be seen from Figure 3, time is when being less than 290min, vitrified bond is piled up abrasive material abrasive band stock removal and is piled up abrasive material abrasive band lower than import, time is when being greater than 290min, vitrified bond piles up abrasive material abrasive band stock removal higher than import abrasive band, and piles up abrasive material abrasive band stock removal all the time higher than common abrasive band.Above-mentioned interpretation shows, the abrasive band that centrifugal drying comminution granulation vitrified bond accumulation abrasive material is made reaches the effect of high efficient grinding, and abrasive band anti-wear performance is good.
Claims (8)
1. centrifugal drying granulating technique prepares the method that abrasive material piled up by vitrified bond, it is characterized in that, comprises the following steps:
1) preparation of vitrified bond: silica, aluminium oxide, lithium carbonate, sodium carbonate, boric acid, Zirconium oxide powder are added in ball milling altar according to certain ratio, dry blend 3h on ball mill, the mixed powder made, through high melt, chilling, ball mill crushing and after sieving, obtains low melting point vitrified bond powder.Wherein in bonding agent, each constituent mass percentage composition is aluminium oxide 5% ~ 9%, silica 48 ~ 54%, sodium carbonate 5% ~ 10%, zirconia 2% ~ 5%, lithium carbonate 3% ~ 6%, boric acid 20% ~ 26%;
2) preparation of slurry: with corundum or silicon carbide abrasive and vitrified bond for raw material, after adding deionized water and dextrin liquid, be mixed and made into slurry through ball milling.Wherein, in siccative, abrasive material mass ratio is 85 ~ 95%, the mass ratio 5 ~ 15% of bonding agent;
3) centrifugal drying granulation: by step 2) in the slurry that mixes carry out centrifugal drying granulation, obtain piling up abrasive material green-ball;
4) calcine: by step 3) in system green-ball drying, calcining, can obtain vitrified bond pile up abrasive material;
Described vitrified bond pile up abrasive grain granularity comparatively evenly, uniform texture, and pile up liquid phase that in abrasive material, bonding agent melting produces to corundum or silicon carbide abrasive parcel better, cohesive force is stronger.
2. preparation method according to claim 1, is characterized in that, described vitrified bond powder crosses 325 mesh sieves.
3. preparation method according to claim 1, is characterized in that, described corundum or silicon carbide abrasive granularity are W40 ~ W0.5.
4. preparation method according to claim 1, is characterized in that, the solid content of described slurry is at 45 ~ 60wt%, and during ball milling, the mass ratio of abrading-ball and powder is 2: 1, and Ball-milling Time is 2 ~ 5h, and the rotating speed of ball mill is 300 ~ 500rpm.
5. preparation method according to claim 1, is characterized in that, described granulation mode is centrifugal drying comminution granulation, centrifuge dish diameter is 120mm, rotating speed 200 ~ 250rpm, time dry, temperature of inlet air 200 ~ 240 DEG C, outlet temperature 100 ~ 120 DEG C.
6. preparation method according to claim 1, is characterized in that, the heating rate of described accumulation abrasive material green-ball calcine technology at 2 ~ 7 DEG C/min, maximum temperature 720 ~ 780 DEG C, temperature retention time 45 ~ 80min.
7. preparation method according to claim 1, is characterized in that, the particle size of the vitrified bond accumulation abrasive grain of gained is 0.3 ~ 1.2mm.
8. abrasive material piled up by vitrified bond, and it is characterized in that, be the abrasive material be prepared from by the method described in any one of claim 1-7.
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Cited By (8)
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| CN106147708A (en) * | 2016-06-30 | 2016-11-23 | 安徽智博新材料科技有限公司 | A kind of simple ceramic disk vibropolish abrasive material |
| CN107936917A (en) * | 2017-12-13 | 2018-04-20 | 河北思瑞恩新材料科技有限公司 | A kind of micro mist performed polymer formula and preparation method thereof |
| CN109465757A (en) * | 2018-10-31 | 2019-03-15 | 广东奔朗新材料股份有限公司 | A kind of vitrified bond and preparation method thereof and the application in CBN grinding wheel |
| CN110229650A (en) * | 2019-06-11 | 2019-09-13 | 郑州中研高科实业有限公司 | A kind of complex phase spherical abrasive material and preparation method thereof |
| CN114752352A (en) * | 2022-04-13 | 2022-07-15 | 河南天马新材料股份有限公司 | High-self-sharpening aluminum oxide abrasive powder and preparation method thereof |
| CN115403956A (en) * | 2022-09-14 | 2022-11-29 | 淄博金纪元研磨材有限公司 | Preparation method of stacked group white corundum micropowder for automatic driving automobile coating |
| CN116162442A (en) * | 2022-12-26 | 2023-05-26 | 河南省惠丰金刚石有限公司 | Preparation method of self-sharpening agglomerated abrasive |
| CN116161960A (en) * | 2022-12-31 | 2023-05-26 | 宁波伏尔肯科技股份有限公司 | Superfine boron carbide casting slurry and preparation method of ceramic thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106147708A (en) * | 2016-06-30 | 2016-11-23 | 安徽智博新材料科技有限公司 | A kind of simple ceramic disk vibropolish abrasive material |
| CN107936917A (en) * | 2017-12-13 | 2018-04-20 | 河北思瑞恩新材料科技有限公司 | A kind of micro mist performed polymer formula and preparation method thereof |
| CN109465757A (en) * | 2018-10-31 | 2019-03-15 | 广东奔朗新材料股份有限公司 | A kind of vitrified bond and preparation method thereof and the application in CBN grinding wheel |
| CN110229650A (en) * | 2019-06-11 | 2019-09-13 | 郑州中研高科实业有限公司 | A kind of complex phase spherical abrasive material and preparation method thereof |
| CN114752352A (en) * | 2022-04-13 | 2022-07-15 | 河南天马新材料股份有限公司 | High-self-sharpening aluminum oxide abrasive powder and preparation method thereof |
| CN115403956A (en) * | 2022-09-14 | 2022-11-29 | 淄博金纪元研磨材有限公司 | Preparation method of stacked group white corundum micropowder for automatic driving automobile coating |
| CN115403956B (en) * | 2022-09-14 | 2023-11-10 | 淄博金纪元研磨材有限公司 | Preparation method of stacked group white corundum micro powder for automatic driving automobile coating |
| CN116162442A (en) * | 2022-12-26 | 2023-05-26 | 河南省惠丰金刚石有限公司 | Preparation method of self-sharpening agglomerated abrasive |
| CN116161960A (en) * | 2022-12-31 | 2023-05-26 | 宁波伏尔肯科技股份有限公司 | Superfine boron carbide casting slurry and preparation method of ceramic thereof |
| CN116161960B (en) * | 2022-12-31 | 2024-01-12 | 宁波伏尔肯科技股份有限公司 | Superfine boron carbide casting slurry and preparation method of ceramic thereof |
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