CN102350722B - Preparation method of ventilatory ceramic stirring rod - Google Patents
Preparation method of ventilatory ceramic stirring rod Download PDFInfo
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- CN102350722B CN102350722B CN 201110168183 CN201110168183A CN102350722B CN 102350722 B CN102350722 B CN 102350722B CN 201110168183 CN201110168183 CN 201110168183 CN 201110168183 A CN201110168183 A CN 201110168183A CN 102350722 B CN102350722 B CN 102350722B
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Abstract
The invention provides a preparation method of a ventilatory ceramic stirring rod and material distribution equipment. The preparation method comprises the steps of ceramic powder preparation, material distribution and forming, demoulding and firing, and is characterized in that alumina powder, calcium carbonate powder and silicon carbide powder are mixed with phenolic resin to manufacture mixed powder with different grain sizes, then the mixed powder is successively and respectively distributed into a ventilatory ceramic stirring rod mould in the material distribution equipment, and by isostatic pressing, demoulding and baking, the ventilatory ceramic stirring rod is manufactured. The ventilatory ceramic stirring rod prepared by adopting the preparation method has the advantages of high bond strength, antioxidation, long service life and even air distribution, can be used repeatedly, and is suitable for industrialized large scale production.
Description
Technical field
The present invention relates to a kind of preparation method and apparatus for distributing of the ceramic stirring rod of ventilating, belong to the porous ceramics preparing technical field.
Background technology
At present, fusion non-ferrous alloy melt homogenization adopts the carbon stirring rod to stir homogenizing usually, because the easy oxidation of carbon stirring rod, its service life is shorter, and it is slow to stir homogenization speed, and production efficiency is low, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind ofly can overcome above-mentioned defective, adapt to that operating temperature range is wide, the ventilation of function admirable pottery stirring rod and apparatus for distributing.Its technical scheme is:
A kind of preparation method of the ceramic stirring rod of ventilating, apparatus for distributing comprises hopper 1, hopper 2, stirring motor 3, powder flow velocity controller 4, powder flow velocity controller 5, propeller-blade 6, powder mixing chamber 7, stirring rod mould, and the preparation method of described ventilation pottery stirring rod may further comprise the steps:
1. feedstock production:
The first step: be that the calcium carbonate powder, 20～60 μ m silicon carbide powders of alumina powder jointed, 0.1～3 μ m of 0.1～5 μ m mixes in 10～20: 1～3: 77～89 ratio by weight and obtain powder 1 with granularity.
Second step: be that 10: 0.5～1 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 1 and phenolic resins, under 40～80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 2 that average grain diameter is 100～600 μ m.
The 3rd step: with granularity be the calcium carbonate powder, 0.5～5 μ m silicon carbide powder of alumina powder jointed, 0.1～3 μ m of 0.1～5 μ m in by weight 10～30: 1～3:, 67～89 ratio mixes and obtains powder 3.
The 4th step: be that 10: 0.2～0.5 ratio mixes in kolleroang by weight with above-mentioned powder 3 and phenolic resins, under 40～80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 4 that average grain diameter is 5～10 μ m.
2. cloth moulding:
Above-mentioned raw materials powder 2 and raw meal 4 are respectively charged in the hopper 1 and hopper 2 of apparatus for distributing, stirring rod mould 8 is placed on the shake table and with the powder mixing chamber 7 of apparatus for distributing again and be connected, powder flow velocity controller 4 is transferred to maximum range, powder flow velocity controller 5 is closed simultaneously, the Vibration on Start-up platform, agitator 3, below being full of stirring rod mould 8 right angle electrical, raw meal 2 begins evenly to reduce the flow of powder flow velocity controller 4 during 1/3rd places, open the flow that powder flow velocity controller 5 evenly increases raw meal 4 simultaneously, raw meal 2 and raw meal 4 when driving propeller-blade 6, are fully mixed under the powder stirring action by agitator 3 in powder mixing chamber 7, powder flow velocity controller 4 is just closed when the mixed powder of raw meal 2 and 4 is full of more than stirring rod mould 8 right angle electrical 1/4th places, powder flow velocity controller 5 evenly increases to the maximum stream flow that just reaches raw meal 4 simultaneously, this moment is from 1/3rd forming raw meal 2 to the gradient distribution of 4 two kinds of raw meal of raw meal to 1/4th places more than stirring rod mould 8 right angle electrical below stirring rod mould 8 right angle electrical, till raw meal 4 is full of mould, then the port sealing of stirring rod mould 8 is put into the pressure forming of isostatic pressing machine 50～200Mpa, made the ceramic stirring rod base substrate of ventilation after the demoulding.
3. burn till
Ventilation ceramic stirring rod base substrate reducing atmosphere under 1350 ℃～1550 ℃ temperature fired made the ceramic stirring rod of ventilation in 2-4 hour.
The present invention compared with prior art, its advantage is:
1, the ventilation pottery stirring rod of the present invention's preparation is made up of two parts earthenware, part under melt liquid level is porous ceramic pipe, be the ceramic of compact pipe at liquid level with top, the limit is stirred and is just fed inert gas in whipping process, discharge by bottom porous tube wall, form the bubble agitation melt, can make the quick homogenizing of melt;
2, the ventilation pottery stirring rod of the present invention's preparation to 1/4th place's raw meal 2 more than the right angle electrical and raw meal 4 distribution gradient, has been eliminated the interface that raw meal 2 and raw meal 4 form at 1/3rd places below the right angle electrical, has improved bond strength and service life.
3, the ventilation pottery stirring rod antioxygenic property height that makes owing to this method, be more than 10 times of carbon stirring rod its service life, melt homogenization speed improves more than 5 times.
Description of drawings
Fig. 1 is the structural representation of the used apparatus for distributing embodiment of the present invention;
Among the figure: 1, hopper; 2, hopper; 3, stirring motor; 4, powder flow velocity controller; 5, powder flow velocity controller; 6, propeller-blade; 7, powder mixing chamber; 8, stirring rod mould
The specific embodiment
In apparatus for distributing shown in Figure 1, hopper 1 and hopper 2 fill varigrained raw meal respectively, raw meal flows to powder mixing chamber 7 by powder flow velocity controller 4 and 5, and be distributed in the stirring rod mould 8 after under the effect of stirring motor 3 driving propeller-blades 6, fully mixing, then the port sealing of stirring rod mould 8 is put into the isostatic pressing machine moulding.
Embodiment 1
1, feedstock production:
The first step: be that the calcium carbonate powder, 20 μ m silicon carbide powders of alumina powder jointed, the 0.1 μ m of 0.1 μ m mixes in 10: 1: 89 ratio by weight and obtain powder 1 with granularity.
Second step: be that 10: 0.5 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 1 and phenolic resins, under 40 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 2 that average grain diameter is 100 μ m.
The 3rd step: be that the calcium carbonate powder, 0.5 μ m silicon carbide powder of alumina powder jointed, the 0.1 μ m of 0.1 μ m mixes in 10: 1: 89 ratio by weight and obtain powder 3 with granularity.
The 4th step: be that 10: 0.2 ratio mixes in kolleroang by weight with above-mentioned powder 3 and phenolic resins, under 40 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 4 that average grain diameter is 5 μ m.
2, cloth moulding:
Above-mentioned raw materials powder 2 and raw meal 4 are respectively charged in the hopper 1 and hopper 2 of apparatus for distributing, stirring rod mould 8 is placed on the shake table and with the powder mixing chamber 7 of apparatus for distributing again and be connected, powder flow velocity controller 4 is transferred to maximum range, powder flow velocity controller 5 is closed simultaneously, the Vibration on Start-up platform, agitator 3, below being full of stirring rod mould 8 right angle electrical, raw meal 2 begins evenly to reduce the flow of powder flow velocity controller 4 during 1/3rd places, open the flow that powder flow velocity controller 5 evenly increases raw meal 4 simultaneously, make raw meal 2 and raw meal 4 in powder mixing chamber 7, drive fully mixing under propeller-blade 6 stirring actions at agitator 3, powder flow velocity controller 4 is just closed when the mixed powder of raw meal 2 and 4 is full of more than stirring rod mould 8 right angle electrical 1/4th places, powder flow velocity controller 5 evenly increases to the maximum stream flow that just reaches raw meal 4 simultaneously, this moment is from 1/3rd forming raw meal 2 to the gradient distribution of 4 two kinds of raw meal of raw meal to 1/4th places more than stirring rod mould 8 right angle electrical below stirring rod mould 8 right angle electrical, till raw meal 4 is full of mould, then the port sealing of stirring rod mould 8 is put into the pressure forming of isostatic pressing machine 50Mpa, made the ceramic stirring rod base substrate of ventilation after the demoulding.
3, burn till
Ventilation ceramic stirring rod base substrate reducing atmosphere under 1350 ℃ temperature fired made the ceramic stirring rod of ventilation in 2 hours.
The purity of testing used proportion material is technical pure.
Obtain the ventilation ceramic stirring rod compressive resistance be 140MPa., 900 ℃ of heatproofs.
Embodiment 2
1, feedstock production:
The first step: be that the calcium carbonate powder, 35 μ m silicon carbide powders of alumina powder jointed, the 1.5 μ m of 2 μ m mixes in 15: 1.5: 83 ratio by weight and obtain powder 1 with granularity.
Second step: be that 10: 0.8 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 1 and phenolic resins, under 60 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 2 that average grain diameter is 350 μ m.
The 3rd step: be that the calcium carbonate powder, 3 μ m silicon carbide powders of alumina powder jointed, the 1.5 μ m of 3 μ m mixes in 20: 1.5: 77 ratio by weight and obtain powder 3 with granularity.
The 4th step: be that 10: 0.3 ratio mixes in kolleroang by weight with above-mentioned powder 3 and phenolic resins, under 60 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 4 that average grain diameter is 8 μ m.
2, cloth moulding:
Above-mentioned raw materials powder 2 and raw meal 4 are respectively charged in the hopper 1 and hopper 2 of apparatus for distributing, stirring rod mould 8 is placed on the shake table and with the powder mixing chamber 7 of apparatus for distributing again and be connected, powder flow velocity controller 4 is transferred to maximum range, powder flow velocity controller 5 is closed simultaneously, the Vibration on Start-up platform, agitator 3, below being full of stirring rod mould 8 right angle electrical, raw meal 2 begins evenly to reduce the flow of powder flow velocity controller 4 during 1/3rd places, open the flow that powder flow velocity controller 5 evenly increases raw meal 4 simultaneously, make raw meal 2 and raw meal 4 in powder mixing chamber 7, drive fully mixing under propeller-blade 6 stirring actions at agitator 3, powder flow velocity controller 4 is just closed when the mixed powder of raw meal 2 and 4 is full of more than stirring rod mould 8 right angle electrical 1/4th places, powder flow velocity controller 5 evenly increases to the maximum stream flow that just reaches raw meal 4 simultaneously, this moment is from 1/3rd forming raw meal 2 to the gradient distribution of 4 two kinds of raw meal of raw meal to 1/4th places more than stirring rod mould 8 right angle electrical below stirring rod mould 8 right angle electrical, till raw meal 4 is full of mould, then the port sealing of stirring rod mould 8 is put into the pressure forming of isostatic pressing machine 120Mpa, made the ceramic stirring rod base substrate of ventilation after the demoulding.
3, burn till
Ventilation ceramic stirring rod base substrate reducing atmosphere under 1450 ℃ temperature fired made the ceramic stirring rod of ventilation in 3 hours.
The purity of testing used proportion material is technical pure.
Obtain the ventilation ceramic stirring rod compressive resistance be 120MPa., 1000 ℃ of heatproofs.
Embodiment 3
1, feedstock production:
The first step: be that the calcium carbonate powder, 60 μ m silicon carbide powders of alumina powder jointed, the 3 μ m of 5 μ m mixes in 20: 3: 89 ratio by weight and obtain powder 1 with granularity.
Second step: be that 10: 1 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 1 and phenolic resins, under 80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 2 that average grain diameter is 600 μ m.
The 3rd step: be that the calcium carbonate powder, 5 μ m silicon carbide powders of alumina powder jointed, the 3 μ m of 5 μ m mixes in 30: 3: 89 ratio by weight and obtain powder 3 with granularity.
The 4th step: be that 10: 0.5 ratio mixes in kolleroang by weight with above-mentioned powder 3 and phenolic resins, under 80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 4 that average grain diameter is 10 μ m.
2, cloth moulding:
Above-mentioned raw materials powder 2 and raw meal 4 are respectively charged in the hopper 1 and hopper 2 of apparatus for distributing, stirring rod mould 8 is placed on the shake table and with the powder mixing chamber 7 of apparatus for distributing again and be connected, powder flow velocity controller 4 is transferred to maximum range, powder flow velocity controller 5 is closed simultaneously, the Vibration on Start-up platform, agitator 3, below being full of stirring rod mould 8 right angle electrical, raw meal 2 begins evenly to reduce the flow of powder flow velocity controller 4 during 1/3rd places, open the flow that powder flow velocity controller 5 evenly increases raw meal 4 simultaneously, make raw meal 2 and raw meal 4 in powder mixing chamber 7, drive fully mixing under propeller-blade 6 stirring actions at agitator 3, powder flow velocity controller 4 is just closed when the mixed powder of raw meal 2 and 4 is full of more than stirring rod mould 8 right angle electrical 1/4th places, powder flow velocity controller 5 evenly increases to the maximum stream flow that just reaches raw meal 4 simultaneously, this moment is from 1/3rd forming raw meal 2 to the gradient distribution of 4 two kinds of raw meal of raw meal to 1/4th places more than stirring rod mould 8 right angle electrical below stirring rod mould 8 right angle electrical, till raw meal 4 is full of mould, then the port sealing of stirring rod mould 8 is put into the pressure forming of isostatic pressing machine 200Mpa, made the ceramic stirring rod base substrate of ventilation after the demoulding.
3, burn till
Ventilation ceramic stirring rod base substrate reducing atmosphere under 1550 ℃ temperature fired made the ceramic stirring rod of ventilation in 4 hours.
The purity of testing used proportion material is technical pure.
Obtain the ventilation ceramic stirring rod compressive resistance be 80MPa., 1000 ℃ of heatproofs.
Claims (1)
1. the preparation method of the ceramic stirring rod of ventilating, it is characterized in that: apparatus for distributing comprises: hopper (1), hopper (2), stirring motor (3), powder flow velocity controller (4), powder flow velocity controller (5), propeller-blade (6), powder mixing chamber (7), stirring rod mould, and the preparation method of described ventilation pottery stirring rod may further comprise the steps:
1. feedstock production:
The first step: be that the calcium carbonate powder, 20～60 μ m silicon carbide powders of alumina powder jointed, 0.1～3 μ m of 0.1～5 μ m mixes in 10～20: 1～3: 77～89 ratio by weight and obtain raw meal 1 with granularity.
Second step: be that 10: 0.5～1 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 1 and phenolic resins, under 40～80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 2 that average grain diameter is 100～600 μ m.
The 3rd step: be that the calcium carbonate powder, 0.5～5 μ m silicon carbide powder of alumina powder jointed, 0.1～3 μ m of 0.1～5 μ m mixes in 10～30: 1～3: 67～89 ratio by weight and obtain raw meal 3 with granularity.
The 4th step: be that 10: 0.2～0.5 ratio mixes in kolleroang by weight with above-mentioned raw materials powder 3 and phenolic resins, under 40～80 ℃ temperature, solidify, in flour mill, pulverize then and make the raw meal 4 that average grain diameter is 5～10 μ m.
2. cloth moulding:
Above-mentioned raw materials powder 2 and raw meal 4 are respectively charged in the hopper (1) and hopper (2) of apparatus for distributing, stirring rod mould (8) is placed on the shake table and with the powder mixing chamber (7) of apparatus for distributing again and be connected, powder flow velocity controller (4) is transferred to maximum range, powder flow velocity controller (5) is closed, the Vibration on Start-up platform, agitator (3), when being full of stirring rod mould (8) 1/3rd places below the right angle electrical, raw meal 2 begins evenly to reduce the flow of powder flow velocity controller (4), open the flow that powder flow velocity controller (5) evenly increases raw meal 4 simultaneously, raw meal 2 and raw meal 4 agitator (3) in powder mixing chamber (7) is driven under propeller-blade (6) stirring action fully to be mixed, when the mixed powder of raw meal 2 and 4 be full of stirring rod mould (8) more than the right angle electrical during 1/4th places powder flow velocity controller (4) just close, powder flow velocity controller (5) evenly increases to the maximum stream flow that just reaches raw meal 4 simultaneously, till raw meal 4 is full of mould, the ceramic stirring rod base substrate of ventilation is made in the pressure forming that the port sealing of stirring rod mould (8) is put into isostatic pressing machine 50～200Mpa then after the demoulding.
3. burn till
Ventilation ceramic stirring rod base substrate reducing atmosphere under 1350 ℃～1550 ℃ temperature fired made the ceramic stirring rod of ventilation in 2-4 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110168183 CN102350722B (en) | 2011-06-22 | 2011-06-22 | Preparation method of ventilatory ceramic stirring rod |
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|---|---|---|---|
| CN 201110168183 CN102350722B (en) | 2011-06-22 | 2011-06-22 | Preparation method of ventilatory ceramic stirring rod |
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| CN102350722A CN102350722A (en) | 2012-02-15 |
| CN102350722B true CN102350722B (en) | 2013-08-21 |
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| CN 201110168183 Expired - Fee Related CN102350722B (en) | 2011-06-22 | 2011-06-22 | Preparation method of ventilatory ceramic stirring rod |
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| CN109336611A (en) * | 2018-12-20 | 2019-02-15 | 山东宝纳新材料有限公司 | A kind of pressureless sintering silicon carbide nozzle and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503296A (en) * | 2009-03-26 | 2009-08-12 | 洛阳北苑特种陶瓷有限公司 | Silicon carbide ceramic agitator head |
| CN201573279U (en) * | 2009-12-11 | 2010-09-08 | 佛山市南海金刚新材料有限公司 | Special vertical mixer for ceramic rolling rod blanks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010000001A1 (en) * | 2008-07-02 | 2010-01-07 | Karen Gasparyan | Bar clamping and tightening tool |
| JP5540288B2 (en) * | 2008-12-24 | 2014-07-02 | 国立大学法人大阪大学 | Metal material processing method, structure processed by metal material processing method, and rotary tool |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503296A (en) * | 2009-03-26 | 2009-08-12 | 洛阳北苑特种陶瓷有限公司 | Silicon carbide ceramic agitator head |
| CN201573279U (en) * | 2009-12-11 | 2010-09-08 | 佛山市南海金刚新材料有限公司 | Special vertical mixer for ceramic rolling rod blanks |
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