CN104926291A - Preparation method of special grinding body for dry powder grinding mill - Google Patents
Preparation method of special grinding body for dry powder grinding mill Download PDFInfo
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Abstract
The invention relates to a preparation method of a special grinding body for a dry powder grinding mill. The preparation method comprises the following steps: (1) batching: mixed-grinding raw material powder to meet the process demand for granularity of 1-10 [mu]m; (2) slurrying: fully mixing the powder and a binder under the vacuum state with the vacuum degree of 0.1-0.01 atm; (3) molding: adopting the hot pressure casting and gel processes to realize blank forming; (4) glue discharging: removing the binder in blanks through heating up an adsorbent in a shuttle kiln, wherein the glue discharging temperature is 1000-1100 DEG C; (5) sintering: sintering the blanks in the shuttle kiln and a tunnel kiln at the temperature of 1450-1750 DEG C; (6) polishing: polishing to obtain the special grinding body for the dry powder grinding mill. The preparation method has the following benefits: (1), the process is simple, less equipment is required, one-time investment is low, the yield is high and production expansion is easy; (2) the application range is wide, and the special grinding body for the dry powder grinding mill, for grinding powder with the granularity of 5-120 nm, can be prepared; (3) in addition, the density is large, wear resistance is achieved and the chemical property is stable.
Description
Technical field
The present invention relates to a kind of novel inorganic non-metallic material powder dry type (cement) grinding medium technical field, the particularly preparation method of the special grinding element of a kind of powder dry grinding mill.
Background technology
Along with the development of current situation, during Cement industry is produced, in ball mill, the consumption of grinding element is large, and the quality of grinding element material, not only has influence on the mill efficiency of grinding machine, and is related to the operation factor of grinding machine.Particularly countries in the world extensively adopt Gao Ge, middle chromium, low-chromium cast-iron (steel) ball in the wear resistance improving grinding element, meet Production requirement.In manufacture of cement, along with the wearing and tearing containing chromium component, heavy metal chromium can be mixed cement.When cement plus water, chromium ion can rapid stripping, causes great injury to human body and environment.China has promulgated the new national standard of " in cement the limitation of water soluble chromium and measuring method " on May 26th, 2013, require that Chinese cement chrome content is lower than 10mg/kg.Accordingly under background, the special grinding element of powder dry grinding mill, cost right in cement production enterprise actual production and environmental requirement can be solved, reduce the load, main frame electric current, temperature, chromium metal, water requirement etc. of grinding machine simultaneously or reduce, during filling ratio, platform to grinding machine, strength of cement, adaptability, specific surface area etc. increase and create great effect.Novel inorganic non-metallic material are in development new technological industry, transformation traditional industry, save energy and protection of the environment and improve the indispensable material conditions of China's international competitiveness.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, provides the preparation method of the special grinding element of a kind of powder dry grinding mill.
The preparation method of the special grinding element of a kind of powder dry grinding mill that the present invention mentions, comprises following making step:
(1) prepare burden: by raw material powder mix grinding to processing requirement, granularity 1--10 μm;
(2) slurrying: to realize fully mixing of powder and binding agent under state, vacuum tightness 0.1---0.01atm vacuumizing;
(3) shaping: employing injection moulding, gel process realize blank forming;
(4) binder removal: remove tackiness agent contained by blank by heating adsorption agent in shuttle kiln, dump temperature 1000--1100 ° C;
(5) sinter: in shuttle kiln, tunnel furnace, carry out blank sintering, temperature 1450---1750 ° of C;
(6) polishing, the obtained described special grinding element of powder dry grinding mill.
Preferably, above-mentioned burden process is mixed by the raw material powder of following portions by weight:
Aluminum oxide powder 85 ~ 92 parts
Kaolin 1 ~ 10 part
Calcium hydrogen carbonate 1 part
Talcum powder 1 ~ 3 part
Paraffin wax binder 0.05 ~ 0.1 part
And according to the special grinding element of abrasion-resistant powder body dry grinding mill that above-mentioned proportioning process obtains, be made up of the component of following weight percent:
Al2O3 92-99%
SiO2 0.1-6%
MgO 0.8-1.8%
CaO 0.1-0.2%
The special grinding element physico-chemical property of abrasion-resistant powder body dry grinding mill of said components is: density>=3.6g/cm
3; Grain size is 1.0-1.5 μm; Abrasion≤0.1g/Kg.h; Mohs' hardness>=9; Water-intake rate≤0.02%.
Preferably, above-mentioned burden process is mixed by the raw material powder of following portions by weight:
CrO2 94-96 part
YO2 3-5 part
Al2O3 0.3-1 part
0.5 ~ 1 part, Suzhou soil;
Titanium dioxide 0.5 ~ 1 part.
The special grinding element physico-chemical property of said components abrasion-resistant powder body dry grinding mill is: density >=5.6g/cm3; Grain size is
0.3-0.5 μm; Abrasion≤0.01g/Kg. h; H hardness >=1250; Crushing strength >=15KN.
Preferably, above-mentioned burden process is mixed by the raw material powder of following portions by weight:
Zirconia powder 90 ~ 98 parts
1 ~ 10 part, yttrium oxide powder
Paraffin wax binder 0.05 ~ 0.1 part
0.5 ~ 1 part, Suzhou soil;
Titanium dioxide 0.5 ~ 1 part.
The pulping process that the present invention mentions comprises the steps:
1) superfine powder of 100 weight parts is put into nodulizer, add the paraffin wax binder of 10 ~ 15 weight parts, be uniformly mixed, sieve, obtained particle diameter is granularity 1--10 μm of powder;
2) powder of above-mentioned steps is poured into slurrying to fill with, start heating and stir, observation is uniformly mixed, suction 0.1---0.01atm, when temperature reaches 80 DEG C, and pulp.
The firing process that the present invention mentions carries out according to following sintering curve:
Normal temperature ~ 300 DEG C 50 DEG C/h
300～1200℃ 70～80℃/h
1200 DEG C are incubated 1 ~ 2 hour
1200 ～1450℃ 80～90℃/h
1650 ~ 1750 DEG C are incubated 2 ~ 3 hours
Temperature fall to 300 DEG C, goes out cellar for storing things.
The polishing process that the present invention mentions, the nature that added water by the special grinding element of obtained powder dry grinding mill polishing 1 ~ 2h carries out.
Beneficial effect of the present invention, specific as follows:
1, the special grinding element density of powder dry grinding mill is 3.68 g/cm
3, steel ball density is 7.8 g/cm
3.Same volume ceramic grinding body weight reduces by one times, greatly reduces grinding machine working current, and main frame electric current is reduced to 44A by 75A, economize on electricity 41%.Decrease the wearing and tearing of grinding machine parts, reduce equipment maintenance cost, improve the operation factor of grinding machine;
2, the special grinding physical efficiency of powder dry grinding mill effectively stops electrostatic, strengthens powder lot dispersing in mill, improves grinding effect.Cement powders particle is better, and the water requirement of cement reduces comparatively large, (123.2-115.8 reduces by 7.4 on year-on-year basis); Strength of cement keeps better relatively, when same fineness ratio surface-area, and excellent strength;
3, when identical amount of water, cement flows degree is better, and the adaptability of simultaneously testing cement and each admixture is good, meets service requirements;
4, test the special grinding element grinding fineness of powder dry grinding mill and reduce by 3.2, specific surface area improves 36;
5, because ceramic grinding volume density is low, can suitably improve grinding machine filling ratio, improve grinding effect, when improving grinding machine platform further;
6, avoid heavy metal chromium to environmental disruption, because the special grinding element of powder dry grinding mill is that inorganic materials is made, effectively can stop bringing into of when grinding chromium, there is suitable practical value.
Embodiment
embodiment 1
:the preparation method of the special grinding element of a kind of powder dry grinding mill that the present invention mentions, comprises the following steps:
1) prepare burden: aluminum oxide powder 85kg, kaolin 1 kg, Calcium hydrogen carbonate 1 kg, talcum powder 1 kg, paraffin wax binder 0.05 kg;
2) conventionally, by the method for wet ball grinding, raw material ball being milled to granularity is 1 μm, goes out mill, mist projection granulating, superfine powder processed;
3) superfine powder of 100 weight parts is put into nodulizer by a., adds the tackiness agent of 10 ~ 15 weight parts, is uniformly mixed, sieve, and obtained particle diameter is granularity 1--10 μm of powder;
(a) powder is poured into slurrying and is filled with by b, and start heating and stir, observation is uniformly mixed, suction 0.1---0.01atm, when temperature reaches 80 DEG C, and pulp.
4) binder removal: remove tackiness agent contained by blank by heating adsorption agent in shuttle kiln, dump temperature 1000--1100 ° C.
5) firing process, carries out according to following sintering curve: in kiln, the speed of 50 DEG C/h rises to 300 DEG C from normal temperature, is then warming up to 1200 DEG C with 80 DEG C/h, is incubated 1 hour; Then be warming up to 1750 DEG C with 90 DEG C/h, be incubated after 2 hours, Temperature fall to 300 DEG C, kiln discharge.
6) polishing, the obtained described special grinding element of abrasion-resistant powder body dry grinding mill.
And according to the special grinding element of abrasion-resistant powder body dry grinding mill that above-mentioned proportioning process obtains, be made up of the component of following weight percent:
Al2O3 92-99%
SiO2 0.1-6%
MgO 0.8-1.8%
CaO 0.1-0.2%
The special grinding element physico-chemical property of abrasion-resistant powder body dry grinding mill of said components is: density>=3.6g/cm
3; Grain size is 1.0-1.5 μm; Abrasion≤0.1g/Kg.h; Mohs' hardness>=9; Water-intake rate≤0.02%.
Certainly, above-mentioned batching also can be: aluminum oxide powder 92 kg, kaolin 10 kg, Calcium hydrogen carbonate 1 kg, talcum powder 3 kg, paraffin wax binder 0.1 kg.
Embodiment 2
,the preparation method of the special grinding element of a kind of powder dry grinding mill that the present invention mentions, comprises the following steps:
1) prepare burden: zirconia powder 90 kg, yttrium oxide powder 1 kg, paraffin wax binder 0.05 kg, Suzhou soil 0.5 kg; Titanium dioxide 0.5 kg, mixes for subsequent use by the raw material of above-mentioned weight;
2) conventionally, being milled to by raw material ball by the method for wet ball grinding is 0.5 μm, goes out mill, mist projection granulating, obtained superfine powder;
3) according to the following step balling-up;
A. the superfine powder of 100 weight parts is put into nodulizer, add the tackiness agent of 10 ~ 15 weight parts, be uniformly mixed, sieve, obtained particle diameter is granularity 1--10 μm of powder;
(a) powder is poured into slurrying and is filled with by b, and start heating and stir, observation is uniformly mixed, suction 0.1---0.01atm, when temperature reaches 80 DEG C, and pulp.
4) binder removal: remove tackiness agent contained by blank by heating adsorption agent in shuttle kiln, dump temperature 1000--1100 ° C.
5) firing process, carries out according to following sintering curve: in kiln, the speed of 50 DEG C/h rises to 300 DEG C from normal temperature, is then warming up to 1200 DEG C with 80 DEG C/h, be incubated 1 hour: be then warming up to 1750 DEG C with 90 DEG C/h, be incubated after 2 hours, Temperature fall to 300 DEG C, kiln discharge.
6) polishing, the obtained described special grinding element of abrasion-resistant powder body dry grinding mill.
According to the method described above, the obtained special grinding element of powder dry grinding mill, is made up of the component of following heavy dish per-cent:
CrO2 94-96%
YO2 3-5%
Al2O3 0.3-1%
The above-mentioned special grinding element physico-chemical property of abrasion-resistant powder body dry grinding mill is, density>=4g/cm
3; Grain size is 0.3-0,5 μm; Abrasion≤0.01g/Kg.h; H hardness>=1250; Crushing strength>=15KN.
Embodiment 3-8
,the preparation method of the special grinding element of a kind of powder dry grinding mill that the present invention mentions, comprises the following steps:
Burden process carries out according to table 1,2, and other are with embodiment 1
Table 1 embodiment 3-5 allocation sheet
| Material name | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Aluminum oxide powder, Kg | 92 | 90 | 85 |
| Kaolin, Kg | 10 | 6 | 1 |
| Calcium hydrogen carbonate, Kg | 1 | 1 | 1 |
| Talcum powder, Kg | 3 | 2 | 3 |
| Paraffin wax binder | 0．1 | 0．07 | 0.05 |
Table 2 embodiment 6-8 allocation sheet
| Material name | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| Zirconia powder, Kg | 90 | 95 | 98 |
| Yttrium oxide powder .Kg | 1 | 5 | 10 |
| Suzhou soil | 0.5 | 0.7 | 1 |
| Titanium dioxide | 0.5 | 0.8 | 1 |
The above, be only part preferred embodiment of the present invention, any those of ordinary skill in the art all may utilize the technical scheme correct of above-mentioned elaboration or are revised as equivalent technical scheme.Therefore, any simple modification of carrying out according to technical scheme of the present invention or substitute equivalents, belong to the scope of protection of present invention to the greatest extent.
Claims (8)
1. a preparation method for the special grinding element of powder dry grinding mill, is characterized in that comprising following making step:
(1) prepare burden: by raw material powder mix grinding to processing requirement, granularity 1--10 μm;
(2) slurrying: to realize fully mixing of powder and binding agent under state, vacuum tightness 0.1---0.01atm vacuumizing;
(3) shaping: employing injection moulding, gel process realize blank forming;
(4) binder removal: remove tackiness agent contained by blank by heating adsorption agent in shuttle kiln, dump temperature 1000--1100 ° C;
(5) sinter: in shuttle kiln, tunnel furnace, carry out blank sintering, temperature 1450---1750 ° of C;
(6) polishing, the obtained described special grinding element of powder dry grinding mill.
2. the preparation method of the special grinding element of powder dry grinding mill according to claim 1, is characterized in that: described
Described burden process is mixed by the raw material powder of following portions by weight:
Aluminum oxide powder 85 ~ 92 parts
Kaolin 1 ~ 10 part
Calcium hydrogen carbonate 1 part
Talcum powder 1 ~ 3 part
Paraffin wax binder 0.05 ~ 0.1 part
And according to the special grinding element of abrasion-resistant powder body dry grinding mill that above-mentioned proportioning process obtains, be made up of the component of following weight percent:
Al2O3 92-99%
SiO2 0.1-6%
MgO 0.8-1.8%
CaO 0.1-0.2%
The special grinding element physico-chemical property of abrasion-resistant powder body dry grinding mill of said components is: density>=3.6g/cm
3; Grain size is 1.0-1.5 μm; Abrasion≤0.1g/Kg.h; Mohs' hardness>=9; Water-intake rate≤0.02%.
3. the preparation method of the special grinding element of powder dry grinding mill according to claim 1, is characterized in that: described burden process is mixed by the raw material powder of following portions by weight:
CrO2 94-96 part
YO2 3-5 part
Al2O3 0.3-1 part
0.5 ~ 1 part, Suzhou soil;
Titanium dioxide 0.5 ~ 1 part.
4. the special grinding element physico-chemical property of said components abrasion-resistant powder body dry grinding mill is: density >=5.6g/cm3; Grain size is 0.3-0.5 μm; Abrasion≤0.01g/Kg. h; H hardness >=1250; Crushing strength >=15KN.
5. the preparation method of the special grinding element of powder dry grinding mill according to claim 1, is characterized in that: described burden process is mixed by the raw material powder of following portions by weight:
Zirconia powder 90 ~ 98 parts
1 ~ 10 part, yttrium oxide powder
Paraffin wax binder 0.05 ~ 0.1 part
0.5 ~ 1 part, Suzhou soil;
Titanium dioxide 0.5 ~ 1 part.
6. the preparation method of the special grinding element of powder dry grinding mill according to any one of claim 1-4, is characterized in that: described pulping process comprises the steps:
1) superfine powder of 100 weight parts is put into nodulizer, add the paraffin wax binder of 10 ~ 15 weight parts, be uniformly mixed, sieve, obtained particle diameter is granularity 1--10 μm of powder;
2) powder of above-mentioned steps is poured into slurrying to fill with, start heating and stir, observation is uniformly mixed, suction 0.1---0.01atm, when temperature reaches 80 DEG C, and pulp.
7. the preparation method of the special grinding element of powder dry grinding mill according to any one of claim 1-4, is characterized in that: described firing process carries out according to following sintering curve:
Normal temperature ~ 300 DEG C 50 DEG C/h
300～1200℃ 70～80℃/h
1200 DEG C are incubated 1 ~ 2 hour
1200 ～1450℃ 80～90℃/h
1650 ~ 1750 DEG C are incubated 2 ~ 3 hours
Temperature fall to 300 DEG C, goes out cellar for storing things.
8. the preparation method of the special grinding element of powder dry grinding mill according to any one of claim 1-4, is characterized in that: described polishing process, and the nature that added water by the special grinding element of obtained powder dry grinding mill polishing 1 ~ 2h carries out.
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| CN105859258A (en) * | 2016-04-02 | 2016-08-17 | 山东天汇研磨耐磨技术开发有限公司 | Ceramic grinding ball for cement ball mill, and preparation method thereof |
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| CN105690543A (en) * | 2016-01-27 | 2016-06-22 | 淄博金石节能新材料科技有限公司 | Manufacturing device and method for regular-icosahedron grinding body |
| CN105819840A (en) * | 2016-04-02 | 2016-08-03 | 东阿东昌天汇科技有限公司 | Ceramic grinding segment for cement grinder and preparation method of ceramic grinding segment |
| CN105859258A (en) * | 2016-04-02 | 2016-08-17 | 山东天汇研磨耐磨技术开发有限公司 | Ceramic grinding ball for cement ball mill, and preparation method thereof |
| CN105859259A (en) * | 2016-04-02 | 2016-08-17 | 山东天汇研磨耐磨技术开发有限公司 | Ceramic grinding ball for cement ball mill, and preparation method thereof |
| CN105859260A (en) * | 2016-04-02 | 2016-08-17 | 东阿东昌天汇科技有限公司 | Easily molded toughened ceramic section for cement ball mill and preparation method thereof |
| CN105859261A (en) * | 2016-04-02 | 2016-08-17 | 东阿东昌天汇科技有限公司 | Ceramic grinding section for cement ball mill, and preparation method thereof |
| CN105859259B (en) * | 2016-04-02 | 2018-06-15 | 山东天汇研磨耐磨技术开发有限公司 | A kind of cement ball mill ceramic grinding ball and preparation method thereof |
| CN117105657A (en) * | 2023-09-18 | 2023-11-24 | 深圳市华辰新材料科技有限公司 | Low-temperature sintering preparation method and equipment of nanoscale lanthanum titanate |
| CN117105657B (en) * | 2023-09-18 | 2024-05-07 | 深圳市华辰新材料科技有限公司 | Low-temperature sintering preparation method and equipment of nanoscale lanthanum titanate |
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