CN100339169C - Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe - Google Patents
Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe Download PDFInfo
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- CN100339169C CN100339169C CNB2005101280585A CN200510128058A CN100339169C CN 100339169 C CN100339169 C CN 100339169C CN B2005101280585 A CNB2005101280585 A CN B2005101280585A CN 200510128058 A CN200510128058 A CN 200510128058A CN 100339169 C CN100339169 C CN 100339169C
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Abstract
The present invention relates to a special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipes, which comprises a refractory aggregate, adhesive, suspending agent and water, wherein the refractory aggregate comprises diatomite powder, perlite powder, vermiculite powder and quartz powder, and the adhesive and the suspending agent compeises sodium bentonite and sodium carboxymethyl cellulose. The present invention has the confection process that the proportion of the sodium bentonite and the sodium carboxymethyl cellulose is pulped for reserving firstly, and then the bentonite slurry and the sodium carboxymethyl cellulose slurry are added into a stirring tank to stir for 0.5 hours at least; the proportion of the refractory aggregate is added into the stirring tank to stir 8 to 45 hours continuously, during continuous stirring of 8 to 45 hours, the proportion of residual water is added into the stirring tank intermittently, and finally, the stirring tank can be stirred as high speed by a colloid mill and can be dispersed for 1 to 2 times. The present invention has the advantages of levelling, favorable suspending performance, low residual strength and not water absorption, and can be still used for long-time placement.
Description
Technical field
The present invention relates to a kind of special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe and technology.
Background technology
(the metal pattern mold of DN50-DN300mm * 3000mm) is in the time of 200～250 ℃ for the flexible interface gray cast iron tube, water base fireproof coating is sprayed on the mold inner surface of rotation at a high speed, moisture sharply evaporates in the coating, the remaining dope layer that is exactly based on refractory aggregate.Again high temperature liquid iron is cast on the dope layer of the mold inner surface of rotation at a high speed, treat the molten iron cooling after, just form cast iron pipe.The major defect of existing coating is as follows:
(1), this coating do not possess levelability, spraying back coating is prone to defectives such as coating pimple, helix.Thereby make the gray cast iron pipe outward appearance of production coarse especially, be difficult to satisfy the overseas market needs; (2), this coating suspension is relatively poor, must could guarantee in constantly stirring that even of coating aborning is straightforward; (3), this coating has higher residual strength, promptly the coating residual strength is bigger, thereby makes not easy to clean of the remaining coating of mold, influence is produced, and clears up remaining coating and also need special equipment; (4), this coating has stronger water imbibition, after coating spraying is finished, do not pour into a mould for a long time, after mold temperature descends, coating can absorbing environmental in large quantity of moisture, and need spraying again during the next time cast.
Summary of the invention:
In order to overcome the shortcoming of prior art, the invention provides a kind of special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe and technology, its levelling, suspendability are good, and residual strength is low, does not absorb water, and long-time placement still can be used.
The present invention solves the technical scheme that its technical problem takes: it comprises refractory aggregate, bonding agent, suspending agent and water, described refractory aggregate comprises diatomite in powder, crushed crude pearlite and vermiculite power, described bonding agent, suspending agent comprise sodium bentonite and sodium carboxymethylcellulose, and the percentage by weight of above-mentioned each component is respectively diatomite in powder: crushed crude pearlite 3%: vermiculite power 10%: sodium bentonite 5%: sodium carboxymethylcellulose 0.5%: water 0.5%: 81%.
Preparing process is: 1, at first that the sodium bentonite and the sodium carboxymethylcellulose slurrying of described ratio is standby, the technology of bentonite slurrying is: 1 part of bentonite is joined in 12 parts of water, continuous stirring got final product in 5 hours, bentonite should be mixed with adhesive strength and the suspension that just can give full play to it behind the bentonite slurry earlier, the technology of sodium carboxymethylcellulose slurrying is: 1 part of sodium carboxymethylcellulose is joined in 12 parts of water continuous stirring 5 hours; 2, bentonite slurry and sodium carboxymethylcellulose slurry being joined agitator tank stirred 0.5 hour at least, the diatomite in powder of adding 3%, 10% crushed crude pearlite and 5% vermiculite power, continuous stirring 20 hours, in 20 hours continuous stirring process, add remaining water after the slurrying several times, guarantee that dope viscosity is between 13～15 seconds; 3, carry out high-speed stirred, disperse to get final product for 2 times by colloid mill at last.
The present invention has following advantage: (1), this coating possess good levelability, when coating was sprayed on mold, the moment of moisture explosive vaporization, coating had very high mobile performance simultaneously, eliminate holidaies such as coating pimple that coating is prone to, helix fully, obtain smooth dope layer.Thereby make the gray cast iron pipe outward appearance of production bright and clean, satisfy the overseas market needs fully; (2), this coating the has heat-insulating property the same with former coating, the coating of same thickness can guarantee that also grey iron pipe is difficult for occurring spoken parts in traditional operas defective and comparatively suitable casting process parameters; (3), this coating has better suspendability, can not stir and just can guarantee the even straightforward of coating aborning; (4), this coating has very low residual strength, after taking off pipe and finishing, remaining coating can be cleaned out with compressed air; (5), this coating do not absorb water, and after coating spraying is finished, do not pour into a mould for a long time, after mold temperature descends, coating can absorbing environmental in large quantity of moisture, and do not need to spray again during the next time cast.
The specific embodiment
The present invention includes refractory aggregate, bonding agent, suspending agent and water.Described refractory aggregate comprises diatomite in powder, crushed crude pearlite and vermiculite power.Described bonding agent, suspending agent comprise sodium bentonite and sodium carboxymethylcellulose.The percentage by weight of above-mentioned each component and water is respectively diatomite in powder: crushed crude pearlite 3%: vermiculite power 10%: sodium bentonite 5%: sodium carboxymethylcellulose 0.5%: water 0.5%: 81%.Preparing process is: 1, at first that the sodium bentonite and the sodium carboxymethylcellulose slurrying of described ratio is standby.The technology of bentonite slurrying is: 1 part of bentonite is joined in 12 parts of water, and continuous stirring got final product in 5 hours.Bentonite should be mixed with adhesive strength and the suspension that just can give full play to it behind the bentonite slurry earlier.The technology of sodium carboxymethylcellulose slurrying is: 1 part of sodium carboxymethylcellulose is joined in 15 parts of water, and continuous stirring got final product in 5 hours.Same sodium carboxymethylcellulose is mixed with adhesive strength and the suspension that just can give full play to it behind the slurry.2, bentonite slurry and sodium carboxymethylcellulose slurry being joined agitator tank stirred 0.5 hour at least, the diatomite in powder of back adding 3%, 10% crushed crude pearlite and 5% vermiculite power, continuous stirring 20 hours, in 20 hours continuous stirring process, add remaining water after the slurrying several times, guarantee that dope viscosity is between 13～15 seconds (with T-4 dope viscosity cup measured value).3, carry out high-speed stirred, disperse to get final product for 2 times by colloid mill at last.
Claims (2)
1, a kind of special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe, it is characterized in that: it comprises refractory aggregate, bonding agent, suspending agent and water, described refractory aggregate comprises diatomite in powder, crushed crude pearlite and vermiculite power, described bonding agent, suspending agent comprise sodium bentonite and sodium carboxymethylcellulose, and the percentage by weight of above-mentioned each component is respectively diatomite in powder: crushed crude pearlite 3%: vermiculite power 10%: sodium bentonite 5%: sodium carboxymethylcellulose 0.5%: water 0.5%: 81%.
2, a kind of technology of preparing described claim 1 coating, it is characterized in that: 1, at first that the sodium bentonite and the sodium carboxymethylcellulose slurrying of described ratio is standby, the technology of bentonite slurrying is: 1 part of bentonite is joined in 12 parts of water, continuous stirring got final product in 5 hours, bentonite should be mixed with adhesive strength and the suspension that just can give full play to it behind the bentonite slurry earlier, the technology of sodium carboxymethylcellulose slurrying is: 1 part of sodium carboxymethylcellulose is joined in 12 parts of water continuous stirring 5 hours; 2, bentonite slurry and sodium carboxymethylcellulose slurry being joined agitator tank stirred 0.5 hour at least, the diatomite in powder of adding 3%, 10% crushed crude pearlite and 5% vermiculite power, continuous stirring 20 hours, in 20 hours continuous stirring process, add remaining water after the slurrying several times, guarantee that dope viscosity is between 13～15 seconds; 3, carry out high-speed stirred, disperse to get final product for 2 times by colloid mill at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101280585A CN100339169C (en) | 2005-11-24 | 2005-11-24 | Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101280585A CN100339169C (en) | 2005-11-24 | 2005-11-24 | Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775415A CN1775415A (en) | 2006-05-24 |
| CN100339169C true CN100339169C (en) | 2007-09-26 |
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| CNB2005101280585A Expired - Fee Related CN100339169C (en) | 2005-11-24 | 2005-11-24 | Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293270B (en) * | 2008-06-18 | 2010-04-07 | 北京交通大学 | Liquid die forging paint of ZGMn13 |
| CN101693281B (en) * | 2009-10-09 | 2011-09-07 | 曲沃县恒通铸造有限公司 | Hot mould centrifugal cast iron pipe mold paint and preparation method thereof |
| CN101941050B (en) * | 2010-09-03 | 2012-07-04 | 吴江市液铸液压件铸造有限公司 | Heat-resistant graphite paste paint |
| CN101954443B (en) * | 2010-09-03 | 2012-07-04 | 吴江市液铸液压件铸造有限公司 | Fire-resistant quartz powder mending paste |
| CN102773404B (en) * | 2011-08-30 | 2014-04-23 | 北京时代锐智科技有限公司 | Anti-whiting coating for cast iron and methods for preparing and using anti-whiting coating for cast iron |
| CN102527925B (en) * | 2012-02-23 | 2013-07-17 | 新兴铸管股份有限公司 | Method for preparing and constructing pipe die coating |
| CN103861994B (en) * | 2013-12-23 | 2016-03-02 | 宁波钰烯阴极保护材料有限责任公司 | For the production of the coating and preparation method thereof of high-silicon cast iron sheath |
| CN104084527A (en) * | 2014-06-16 | 2014-10-08 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based foundry coating compounded by chromite/ expanded vermiculite and producing method thereof |
| CN104475671A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Quartz powder/expanded vermiculite composite casting coating and manufacturing method thereof |
| CN104399867A (en) * | 2014-11-08 | 2015-03-11 | 芜湖市鸿坤汽车零部件有限公司 | Alum ore tailing alcohol-based casting paint and manufacturing method thereof |
| CN108837967A (en) * | 2018-07-26 | 2018-11-20 | 四川省川建管道有限公司 | A kind of coating transportation system for pipe die spraying |
| CN113070445B (en) * | 2021-03-25 | 2021-12-10 | 广东新兴铸管有限公司 | Large-caliber nodular cast iron pipe die coating and preparation method and application thereof |
| CN115815520B (en) * | 2023-02-14 | 2023-05-09 | 中北大学 | Core paint for aluminum alloy freezing casting and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1116141A (en) * | 1995-04-29 | 1996-02-07 | 华南理工大学 | Paint for spun cast pipe |
| CN1520951A (en) * | 2003-01-29 | 2004-08-18 | 中国石油天然气集团公司 | Coating for centrifugal casting high alloy furnace tube metal mould and method thereof |
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- 2005-11-24 CN CNB2005101280585A patent/CN100339169C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116141A (en) * | 1995-04-29 | 1996-02-07 | 华南理工大学 | Paint for spun cast pipe |
| CN1520951A (en) * | 2003-01-29 | 2004-08-18 | 中国石油天然气集团公司 | Coating for centrifugal casting high alloy furnace tube metal mould and method thereof |
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| CN1775415A (en) | 2006-05-24 |
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