CN103495699A - Molding sand for producing large supercritical cast steel and production method of molding sand - Google Patents
Molding sand for producing large supercritical cast steel and production method of molding sand Download PDFInfo
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- CN103495699A CN103495699A CN201310481214.0A CN201310481214A CN103495699A CN 103495699 A CN103495699 A CN 103495699A CN 201310481214 A CN201310481214 A CN 201310481214A CN 103495699 A CN103495699 A CN 103495699A
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Abstract
The invention relates to molding sand for producing large supercritical cast steel. The molding sand is characterized by comprising, by weight, 240-260 parts of quartz sand, 60-70 parts of chromium ore, 20-30 parts of natural clay, 4-5 parts of epoxidized soybean oil, 45-50 parts of sepiolite, 2-3 parts of sodium pyrophosphate, 3-4 parts of ammonium polyphosphate, 1-2 parts of zinc borate, 8-10 parts of alkaline phenolic resin and 3-5 parts of benzenesulfonic acid. The quartz sand and the chromium ore are subjected to calcination, high-temperature calcination and dispersion grinding to obtain the molding sand. The obtained molding sand is excellent in breathability, cohesiveness, toughness and plasticity. Organic resin and zinc borate are used to increase strength of the molding sand. In addition, the molding sand is good in high-temperature collapsibility, free of sand burning, applicable to large cast steel and high in yield, and economical benefits are increased.
Description
Technical field
The present invention relates to a kind of casting field, relate in particular to a kind of molding sand that large and super-critical steel-casting uses and preparation method thereof of producing.
Background technology
Molding sand is to be used for the material of moulding in casting.Molding sand is generally mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things, also available natural silica sand argillaceous, the sand formulation Sand particle diameter that common cast aluminium is used is too large or too little, molding sand material footpath is too large, although gas permeability is better, aloxite part surface ratio is more coarse, fineness is bad, molding sand material footpath is too little, causes the sand mold gas permeability bad, and aluminium casting has pore to produce.Domestic and international widely used coal dust clay green-sand, generally by the mixed system of roughing sand, binding agent, coal dust additive etc. and water, formed, there is certain anti-scab effect and the cost of material is low, production efficiency is high, but its consumption is large, discharge is serious, at the casting process coal dust firing, decompose and produce toxic gas and pollute.
Molding sand, by binding agent difference used, can be divided into clay-bonded sand, water-glass sand, cement bonded sand, quartz sand etc., and that with clay-bonded sand, water-glass sand and quartz sand, uses is maximum.The effect of molding sand in Foundry Production is very important, and the casting wasted product caused because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods.Usually to the requirement of molding sand, be: 1, there is higher intensity and heat endurance, to bear the effect of various external force and high temperature.2, good mobility, the ability that molding sand mutually moves between sand grains under external force or Action of Gravity Field own.3, certain plasticity, molding sand is out of shape under external force, can keep the ability of the shape that gives after external force is removed.4, gas permeability preferably, the molding sand hole sees through the ability of gas.5, high collapsibility, weigh up again grittiness, and after casting solidification, whether molding sand easily destroys, the performance of whether easily removing from foundry goods.
Current casting field development rapidly, higher for the performance requirement of steel-casting and ironcasting, thereby require further to promote the performance of molding sand.
Summary of the invention
The object of the present invention is to provide a kind of molding sand that large and super-critical steel-casting uses and preparation method thereof of producing, this molding sand has the advantages that intensity is large, collapsibility is good.
Technical scheme of the present invention is as follows:
A kind ofly produce the molding sand that large and super-critical steel-casting is used, it is characterized in that being made by the raw material of following weight portion: quartz sand 240-260, chrome ore 60-70, natural clay 20-30, epoxidized soybean oil 4-5, sepiolite 45-50, sodium pyrophosphate 2-3, APP 3-4, Firebrake ZB 1-2, alkalescent phenol resin 8-10, benzene sulfonic acid 3-5;
The preparation method of the molding sand that described production large and super-critical steel-casting is used, it is characterized in that comprising the following steps: quartz sand, chrome ore are mixed and put into 710-730 ℃ of calcining furnace calcining 3-4 hour, then, take out, be ground into 200-400 order powder, then add natural clay, epoxidized soybean oil, APP, suitable quantity of water, dispersed with stirring, pugging, send into calcining 4-5 hour in 1410-1430 ℃ of calcining furnace, taking-up is crushed to the 50-100 order, obtains the calcining material; Sepiolite, sodium pyrophosphate are mixed, grind 20-30 minute, then with other residual components, mix 10-15 minute and get final product.
Beneficial effect of the present invention
The present invention has used quartz sand, chrome ore, through calcining, high-temperature calcination, dispersion grinding, the molding sand obtained has excellent gas permeability, caking property, toughness, plasticity, used organic resin and Firebrake ZB simultaneously, increased the intensity of molding sand, and the high temperature collapsibility is good, not scab, be applicable to large-scale steel-casting and use, yield rate is high, increases economic efficiency.
The specific embodiment
A kind ofly produce the molding sand that large and super-critical steel-casting is used, made by the raw material of following weight portion (kilogram): quartz sand 250, chrome ore 65, natural clay 25, epoxidized soybean oil 4.5, sepiolite 48, sodium pyrophosphate 2.5, APP 3.5, Firebrake ZB 1.5, alkalescent phenol resin 9, benzene sulfonic acid 4;
The preparation method of the molding sand that described production large and super-critical steel-casting is used, comprise the following steps: quartz sand, chrome ore are mixed and put into 720 ℃ of calcining furnace calcinings 3.4 hours, then, take out, be ground into 300 order powder, then add natural clay, epoxidized soybean oil, APP, suitable quantity of water, dispersed with stirring, pugging, send in 1420 ℃ of calcining furnaces and calcine 4.5 hours, taking-up is crushed to 80 orders, obtains the calcining material; Sepiolite, sodium pyrophosphate are mixed, grind 25 minutes, then with other residual components, mix 13 minutes and get final product.
The processing performance of the molding sand that the present invention makes:
Green compression strength: 0.142Mpa, air penetrability: 101%, hot green tensile strength: 423Kpa, shatter index: 84%.
Claims (2)
1. produce the molding sand that large and super-critical steel-casting is used for one kind, it is characterized in that being made by the raw material of following weight portion: quartz sand 240-260, chrome ore 60-70, natural clay 20-30, epoxidized soybean oil 4-5, sepiolite 45-50, sodium pyrophosphate 2-3, APP 3-4, Firebrake ZB 1-2, alkalescent phenol resin 8-10, benzene sulfonic acid 3-5.
2. produce according to claim 1 the preparation method of the molding sand that large and super-critical steel-casting uses, it is characterized in that comprising the following steps: quartz sand, chrome ore are mixed and put into 710-730 ℃ of calcining furnace calcining 3-4 hour, then, take out, be ground into 200-400 order powder, then add natural clay, epoxidized soybean oil, APP, suitable quantity of water, dispersed with stirring, pugging, send into calcining 4-5 hour in 1410-1430 ℃ of calcining furnace, taking-up is crushed to the 50-100 order, obtains the calcining material; Sepiolite, sodium pyrophosphate are mixed, grind 20-30 minute, then with other residual components, mix 10-15 minute and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481214.0A CN103495699A (en) | 2013-10-16 | 2013-10-16 | Molding sand for producing large supercritical cast steel and production method of molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481214.0A CN103495699A (en) | 2013-10-16 | 2013-10-16 | Molding sand for producing large supercritical cast steel and production method of molding sand |
Publications (1)
| Publication Number | Publication Date |
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| CN103495699A true CN103495699A (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310481214.0A Pending CN103495699A (en) | 2013-10-16 | 2013-10-16 | Molding sand for producing large supercritical cast steel and production method of molding sand |
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| CN (1) | CN103495699A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414014A (en) * | 2017-08-15 | 2017-12-01 | 合肥正明机械有限公司 | A kind of high temperature resistant molding sand |
| CN112775390A (en) * | 2020-12-19 | 2021-05-11 | 郑州煤机格林材料科技有限公司 | Mixed sand process replacing pure chromium ore sand |
| CN113441677A (en) * | 2021-06-18 | 2021-09-28 | 浙江瓯赛汽车部件铸造有限公司 | Casting process of precoated sand for producing turbine box body |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032127A (en) * | 1987-04-04 | 1989-04-05 | 天津市南开区铸造涂料厂 | Composite type binding material for casting |
| CN101003084A (en) * | 2007-01-09 | 2007-07-25 | 辽宁福鞍铸业集团有限公司 | Production of large and super-critical steel-casting by using alkali phenolic aldehyde resin art |
| CN101104194A (en) * | 2006-07-10 | 2008-01-16 | 旭有机材工业株式会社 | Mould using for organic binder, molding sand composition and mould |
| CN102728777A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Multicomponent mixed casting molding sand and preparation method thereof |
| CN102861865A (en) * | 2011-07-06 | 2013-01-09 | 三鑫重工机械有限公司 | Molding sand proportioning technology for producing large supercritical casting steel |
| CN102921879A (en) * | 2012-10-25 | 2013-02-13 | 无锡中彩新材料股份有限公司 | Metallurgical casting mould |
| CN103273000A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from limestone sand as main material and manufacturing method thereof |
-
2013
- 2013-10-16 CN CN201310481214.0A patent/CN103495699A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032127A (en) * | 1987-04-04 | 1989-04-05 | 天津市南开区铸造涂料厂 | Composite type binding material for casting |
| CN101104194A (en) * | 2006-07-10 | 2008-01-16 | 旭有机材工业株式会社 | Mould using for organic binder, molding sand composition and mould |
| CN101003084A (en) * | 2007-01-09 | 2007-07-25 | 辽宁福鞍铸业集团有限公司 | Production of large and super-critical steel-casting by using alkali phenolic aldehyde resin art |
| CN102861865A (en) * | 2011-07-06 | 2013-01-09 | 三鑫重工机械有限公司 | Molding sand proportioning technology for producing large supercritical casting steel |
| CN102728777A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Multicomponent mixed casting molding sand and preparation method thereof |
| CN102921879A (en) * | 2012-10-25 | 2013-02-13 | 无锡中彩新材料股份有限公司 | Metallurgical casting mould |
| CN103273000A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand manufactured from limestone sand as main material and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 杜西灵等: "《铸造技术与应用案例》", 31 October 2009, 机械工业出版社 * |
| 耿浩然等: "《实用铸件重力成形技术》", 31 October 2003, 化学工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414014A (en) * | 2017-08-15 | 2017-12-01 | 合肥正明机械有限公司 | A kind of high temperature resistant molding sand |
| CN107414014B (en) * | 2017-08-15 | 2019-12-06 | 宿州速果信息科技有限公司 | High-temperature-resistant molding sand |
| CN112775390A (en) * | 2020-12-19 | 2021-05-11 | 郑州煤机格林材料科技有限公司 | Mixed sand process replacing pure chromium ore sand |
| CN113441677A (en) * | 2021-06-18 | 2021-09-28 | 浙江瓯赛汽车部件铸造有限公司 | Casting process of precoated sand for producing turbine box body |
| CN113441677B (en) * | 2021-06-18 | 2022-11-08 | 浙江瓯赛汽车部件铸造有限公司 | Casting process of precoated sand for producing turbine box |
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Application publication date: 20140108 |
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| RJ01 | Rejection of invention patent application after publication |