CN1520951A - Coating for centrifugal casting high alloy furnace tube metal mould and method thereof - Google Patents
Coating for centrifugal casting high alloy furnace tube metal mould and method thereof Download PDFInfo
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- CN1520951A CN1520951A CNA031018912A CN03101891A CN1520951A CN 1520951 A CN1520951 A CN 1520951A CN A031018912 A CNA031018912 A CN A031018912A CN 03101891 A CN03101891 A CN 03101891A CN 1520951 A CN1520951 A CN 1520951A
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Abstract
The present invention is metal type paint for centrifugal casting high-alloy furnace tube and its production process. The material includes zirconite powder, silica sol, fluotrite powder, cellulose, PVA and bentonite; and the mixing production process includes dry mixing zirconite powder, fluotrite powder and bentonite inside a crushing roller mill for 15 min, dissolving cellulose and PVA in water and mixing and milling for 3 hr, and adding silica sol and mixing and milling for 30 min. The paint can form coating with increased low temperature strength, increased low temperature plasticity, raised flush resistance and vibration resistance.
Description
Affiliated technical field
The present invention releases is employed coating in the production process of a kind of high alloy conversion tube at petroleum chemical industry, concetrated pipe, cracking of ethylene pipe, specifically, is centrifugal casting high-alloy furnace pipe chill coating and method.
Background technology
The employed high alloy conversion tube of China's oil chemical industry, concetrated pipe, cracking of ethylene pipe; The employed holder rods of float glass lehr roller-way of building material industry etc. all are the high-alloy furnace pipes that utilizes centrifugal casting technique to produce.Used frock is the die spinning mould in this production process.Nearly 2000 ℃ high-temperature molten steel pours in this mould behind the cooling forming, the boiler tube after the moulding is ejected from dies cavity again.
In boiler tube factory of the existing a few family of China, employed coating is that our factory is several years ago also having a small amount of import, is used for the operating position of this coating is compared from a company's import in Wisconsin continent mostly.This import coating is in the explanation of proterties that use showed, its main component be with silica flour and zirconium English powder be main refractory material, water glass solution be bonding agent, attached be a kind of centrifugal casting coating of suspending agent with diatomite etc.Since the technology that China does not produce this coating before this, the whole dependence on import of this demand.And this coating also has certain shortcoming:
1), elevated temperature strength is lower, because the bonding agent that it uses is waterglass, exists setting temperature height, fireballing characteristics in spraying process, it is lower to cause waterglass to solidify back intensity, causes the decline of coating elevated temperature strength;
2), the boiler tube surface quality is relatively poor because waterglass exists low-temperature expansion when solidifying, phase transformation appears in silica flour when high temperature, also exist the phenomenon of volumetric expansion.The stack of these two kinds of volumetric expansion factors has caused the dope layer less stable, causes the boiler tube surface quality to descend;
3), the collapsibility of coating is relatively poor, because retained strength height, this coating of waterglass do not possess crust again, causes the boiler tube surface to have the scab situation;
4), the price height, exist certain storage life.
Summary of the invention
The object of the present invention is to provide a kind of plasticity of coating when low temperature that makes to increase, the ability of anti-vibration when the ability of raising dope layer antiscour when cast and metal mold run up, and can improve the boiler tube surface quality, effectively eliminate the cleaning up cost that causes owing to scab, and can realize with using with system, solved the centrifugal casting high-alloy furnace pipe chill coating and the method for difficulty of transportation, the storage of coating.
The present invention is achieved in that
The centrifugal casting high-alloy furnace pipe coating of being announced is to be that refractory material, Ludox are bonding agent with zirconium English powder; Add cellulose and polyvinyl alcohol for the low temperature intensity that improves coating, the plasticity that increases coating; Adding fluorspar powder is that coating has crust, adds bentonite to increase the suspension of coating.
Its composition is as follows:
Zirconium English powder 100KG Ludox 5～15KG fluorspar powder 2～6KG cellulose 80～200G polyvinyl alcohol 80～200G bentonite 3～8KG
Mix the system method:
Zirconium English powder, fluorspar powder 2～6KG, the bentonite 3～8KG of 100KG are added in the edge runner, do and mixed 15 minutes, add with water-soluble 80～200G cellulose, 80～200G polyvinyl alcohol and 5KG water, mixed grind 3 hours.Add Ludox 5～15KG mixed grind 30 minutes, and can make this material.
Of the present inventionly be a little:
1) this centrifugal casting high-alloy furnace pipe chill coating of the present invention's announcement is because the low temperature intensity increase of the spraying back coating that do not coexist of binding agent; Because the adding of cellulose and polyvinyl alcohol increases the plasticity of coating when low temperature, the ability of anti-vibration when having improved the ability of dope layer antiscour when cast and metal mold and running up.
2) this centrifugal casting high-alloy furnace pipe chill coating of the present invention's announcement has improved the boiler tube surface quality owing to all selected stability material preferably for use on refractory material and binding agent.
3) because the adding of crustization agent, make that dope layer can attached to taking out of behind the boiler tube surface, explosion comes off with the reduction of temperature with the place, top of boiler tube, eliminated the cleaning up cost that causes owing to scab.
4) can realize having solved the transportation of coating, the difficulty of storage with using with system.
5) reduced production cost.
Our factory is at the initial stage of this product of exploitation centrifugal casting high-alloy furnace pipe, in order to solve the unconformable situation of imported product in transportation, storage and our factory actual production, the intensity that solves this coating is low, the problem of collapsibility difference, improve our factory boiler tube surface quality, reduce production costs, this product has been researched and developed in investment.Made the change of essence from bonding agent, the refractory material of this product, and added certain agent material that has and finished shell material, made it under high-temperature condition, have crust to increase the low temperature intensity of coating, to add.
Concrete enforcement
Centrifugal casting high-alloy furnace pipe coating provided by the present invention is to be refractory material with zirconium English powder, all is the zirconium English powder based on 100KG in process for preparation, adds the other materials of different components and makes the coating of different performance.
Example 1, zirconium English powder 100KG, Ludox 5KG, fluorspar powder 2KG, cellulose 80G, polyvinyl alcohol 80G
Bentonite 3KG.
Mix the system method: will zirconium English powder, fluorspar powder, bentonite, adding edge runner in, do and mixed 15 minutes, add with water-soluble 80G cellulose, 80G polyvinyl alcohol and 5KG water, mixed grind 3 hours.Added Ludox 5KG mixed grind 30 minutes.
This method is mixed the coating of making and is canescence, paste coating, and feel is fine and smooth.In use elevated temperature strength, characteristics that crust property is moderate are suitable for the requirement of the less high alloy ethylene tube centrifugal casting technique of bore.
Example 2, zirconium English powder 100KG, Ludox 8KG, fluorspar powder 3KG, cellulose 150G, polyvinyl alcohol 100G
Bentonite 3KG.
Mix the system method: with example 1.Be suitable for the requirement of bore at high-alloy furnace pipe centrifugal casting techniques such as the conversion tube of 100-200mm, concetrated pipes.
Example 3, zirconium English powder 100KG, Ludox 15KG, fluorspar powder 8KG, cellulose 200G, polyvinyl alcohol 200G
Bentonite 3KG.
Mix the system method: with example 1.Be suitable for bore greater than the concetrated pipe of 200mm, holder rod, metallurgical reaction etc. the requirement of high-alloy furnace pipe centrifugal casting technique.
Above-mentioned mixed control equipment uses rolling wheel coating to mix the system machine, and its model is the CMSA-800 edge runner, is produced by Chinese Gaizhou City Xiong Yue Foundry Works.
That this material has is heat-resisting, antiscour, cost is low, spalling good, the temperature requirement boiler tube surface irregularity not high, that produce when using to type tube in the spraying process is lower, is applicable to the production of the heat-resisting boiler tube of industries such as petrochemical industry, metallurgy, building materials.
Claims (3)
1. centrifugal casting high-alloy furnace pipe chill coating, it is characterized in that: composition is: zirconium English powder 100KG Ludox 5～15KG fluorspar powder 2～6KG cellulose 80～200G polyvinyl alcohol 80～200G bentonite 3～8KG.
2. the method for centrifugal casting high-alloy furnace pipe chill coating, it is characterized in that: mixing the system method is: zirconium English powder, fluorspar powder 2～6KG, the bentonite 3～8KG of 100KG are added in the edge runner, do and mixed 15 minutes, add with water-soluble 80～200G cellulose, 80～200G polyvinyl alcohol and 5KG water, mixed grind 3 hours.Added Ludox 5～15KG mixed grind 30 minutes.
3, mixing control equipment uses rolling wheel coating to mix the system machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031018912A CN1520951A (en) | 2003-01-29 | 2003-01-29 | Coating for centrifugal casting high alloy furnace tube metal mould and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031018912A CN1520951A (en) | 2003-01-29 | 2003-01-29 | Coating for centrifugal casting high alloy furnace tube metal mould and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1520951A true CN1520951A (en) | 2004-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031018912A Pending CN1520951A (en) | 2003-01-29 | 2003-01-29 | Coating for centrifugal casting high alloy furnace tube metal mould and method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1520951A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100339169C (en) * | 2005-11-24 | 2007-09-26 | 张鑫 | Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe |
| CN100418666C (en) * | 2006-11-24 | 2008-09-17 | 费长正 | Alcohol zircon flour coating for heavy castings and its production method |
| CN101160186B (en) * | 2005-04-20 | 2011-02-02 | 皮奇尼电冶公司 | Dry-spray powder products for the protection of moulds for the centrifugal casting of iron pipes, in association with a wet-spray powder product |
| CN101774010B (en) * | 2010-01-29 | 2011-08-31 | 新兴铸管股份有限公司 | Bimetallic metallurgical composite wear-resisting tube blank and manufacturing method thereof |
| CN102430702A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Centrifugal cast pipe metal type paint |
| CN106001396A (en) * | 2016-06-30 | 2016-10-12 | 中原内配集团安徽有限责任公司 | Cylinder sleeve centrifugal casting coating and production method thereof |
| CN112338135A (en) * | 2020-10-20 | 2021-02-09 | 湖南塑源特科技有限公司 | Metal mold coating for casting and preparation method thereof |
-
2003
- 2003-01-29 CN CNA031018912A patent/CN1520951A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101160186B (en) * | 2005-04-20 | 2011-02-02 | 皮奇尼电冶公司 | Dry-spray powder products for the protection of moulds for the centrifugal casting of iron pipes, in association with a wet-spray powder product |
| CN100339169C (en) * | 2005-11-24 | 2007-09-26 | 张鑫 | Special coating of hot-mould centrifugal casting mould for flexible joint ferrosteel pipe |
| CN100418666C (en) * | 2006-11-24 | 2008-09-17 | 费长正 | Alcohol zircon flour coating for heavy castings and its production method |
| CN101774010B (en) * | 2010-01-29 | 2011-08-31 | 新兴铸管股份有限公司 | Bimetallic metallurgical composite wear-resisting tube blank and manufacturing method thereof |
| CN102430702A (en) * | 2011-11-29 | 2012-05-02 | 朱小英 | Centrifugal cast pipe metal type paint |
| CN102430702B (en) * | 2011-11-29 | 2013-07-24 | 宁波兴柯汽车新材料科技有限公司 | Centrifugal cast pipe metal type paint |
| CN106001396A (en) * | 2016-06-30 | 2016-10-12 | 中原内配集团安徽有限责任公司 | Cylinder sleeve centrifugal casting coating and production method thereof |
| CN112338135A (en) * | 2020-10-20 | 2021-02-09 | 湖南塑源特科技有限公司 | Metal mold coating for casting and preparation method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |