CN103521691A - Modified bentonite molding sand and preparation method thereof - Google Patents
Modified bentonite molding sand and preparation method thereof Download PDFInfo
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- CN103521691A CN103521691A CN201310481181.XA CN201310481181A CN103521691A CN 103521691 A CN103521691 A CN 103521691A CN 201310481181 A CN201310481181 A CN 201310481181A CN 103521691 A CN103521691 A CN 103521691A
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Abstract
The invention provides modified bentonite molding sand. The modified bentonite molding sand is prepared from the following raw materials in parts by weight: 180-195 parts of bentonite, 30-40 parts of loess powder, 50-60 parts of metakaolin, 70-80 parts of steel slag, 20-30 parts of beta-semi-hydrated gypsum, 3-6 parts of pulverized coal, 2-3 parts of sodium sulfide, 1-2 parts of fatty alcohol-polyoxyethylene ether, 2-3 parts of alkylphenol polyoxyethylene, 1-2 parts of polyoxyethylene fatty acid, 3-5 parts of lime, 10-14 pars of calcined alumen and a proper amount of water. The problem that the size is affected by the high expansion rate of the bentonite is solved by use of the loess powder, the metakaolin, the steel slag and the like and the application of the technologies such as calcining, disperse grinding and the like. The liquidity of the molding sand and the brightness of castings are improved by the use of beta-semi-hydrated gypsum, pulverized coal, calcined alumen and the like. The modified bentonite molding sand provided by the invention has high strength, humidity and viscosity and can be used for reducing such phenomena of the castings as shrinkage cavity, shrinkage porosity, peeling and sand inclusion.
Description
Technical field
The present invention relates to a kind of casting field, relate in particular to a kind of modified alta-mud molding sand and preparation method thereof.
Background technology
Molding sand is in casting, to be used for the material of moulding.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 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 casting process coal dust firing, decompose and produce toxic gas and pollute.
Molding sand is different by binding agent 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 causing because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods.Conventionally 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, good gas permeability, molding sand hole sees through the ability of gas.5, high collapsibility, weighs 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 modified alta-mud molding sand and preparation method thereof, this molding sand has the feature of high gas permeability, knockability, heat endurance.
Technical scheme of the present invention is as follows:
A molding sand, is characterized in that being made by the raw material of following weight portion: bentonite 180-195, loess powder 30-40, metakaolin 50-60, slag 70-80, β-semi-hydrated gypsum 20-30, coal dust 3-6, vulcanized sodium 2-3, AEO 1-2, APES 2-3, polyoxyethylene carboxylate 1-2, lime 3-5, calcining alum 10-14, water are appropriate;
The preparation method of described modified alta-mud molding sand, it is characterized in that comprising the following steps: bentonite, loess powder, metakaolin, slag are put into 450-480 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 200-400 order powder, then add vulcanized sodium, AEO, APES, suitable quantity of water, dispersed with stirring, pugging, sends in 1460-1490 ℃ of calcining furnace and calcines 4-5 hour, taking-up is crushed to 50-100 order, obtains calcining material; β-semi-hydrated gypsum, coal dust, calcining alum are mixed, and grinding distribution, mixes, then adds quite enter water wet mixing 10-15 minute of compound weight 3-6% and get final product with calcining material, other residual components.
Beneficial effect of the present invention
The present invention has used loess powder, metakaolin, slag etc., through techniques such as calcining, dispersion grinding, has improved bentonite, and expansion rate is high, affects the problem of size; Be combined with the raw materials such as β-semi-hydrated gypsum, coal dust, calcining alum, increased mobility, the raising foundry goods brightness of molding sand; High, the wet viscosity of molding sand dry strength of the present invention is large, shrinkage cavity and porosity phenomenon, peeling, the burning into sand phenomenon of minimizing foundry goods.
The specific embodiment
A molding sand, by following weight portion (kilogram) raw material make: bentonite 190, loess powder 35, metakaolin 55, slag 75, β-semi-hydrated gypsum 25, coal dust 5, vulcanized sodium 2.5, AEO 1.5, APES 2.5, polyoxyethylene carboxylate 1.5, lime 4, calcining alum 13, water are appropriate;
The preparation method of described modified alta-mud molding sand, comprise the following steps: bentonite, loess powder, metakaolin, slag are put into 460 ℃ of calcining furnaces and calcine 4.5 hours, then, take out, be ground into 300 order powder, then add vulcanized sodium, AEO, APES, suitable quantity of water, dispersed with stirring, pugging, sends in 1470 ℃ of calcining furnaces and calcines 4.6 hours, taking-up is crushed to 80 orders, obtains calcining material; β-semi-hydrated gypsum, coal dust, calcining alum are mixed, and grinding distribution, mixes, then adds quite enter the water wet mixing 13 minutes of compound weight 5 and get final product with calcining material, other residual components.
The processing performance of the molding sand that the present invention makes:
Green compression strength: 0.134Mpa, air penetrability: 126%, hot green tensile strength: 423Kpa, shatter index: 86%.
Claims (2)
1. a modified alta-mud molding sand, is characterized in that being made by the raw material of following weight portion: bentonite 180-195, loess powder 30-40, metakaolin 50-60, slag 70-80, β-semi-hydrated gypsum 20-30, coal dust 3-6, vulcanized sodium 2-3, AEO 1-2, APES 2-3, polyoxyethylene carboxylate 1-2, lime 3-5, calcining alum 10-14, water are appropriate.
2. the preparation method of modified alta-mud molding sand according to claim 1, it is characterized in that comprising the following steps: bentonite, loess powder, metakaolin, slag are put into 450-480 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 200-400 order powder, then add vulcanized sodium, AEO, APES, suitable quantity of water, dispersed with stirring, pugging, send in 1460-1490 ℃ of calcining furnace and calcine 4-5 hour, taking-up is crushed to 50-100 order, obtains calcining material; β-semi-hydrated gypsum, coal dust, calcining alum are mixed, and grinding distribution, mixes, then adds quite enter water wet mixing 10-15 minute of compound weight 3-6% and get final product with calcining material, other residual components.
Priority Applications (1)
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| CN201310481181.XA CN103521691A (en) | 2013-10-16 | 2013-10-16 | Modified bentonite molding sand and preparation method thereof |
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| CN201310481181.XA CN103521691A (en) | 2013-10-16 | 2013-10-16 | Modified bentonite molding sand and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226889A (en) * | 2014-09-24 | 2014-12-24 | 河南省西峡汽车水泵股份有限公司 | Casting molding sand with regenerated dedusting ash and preparation technology of casting molding sand |
| CN104646595A (en) * | 2015-01-22 | 2015-05-27 | 安徽省繁昌县皖南阀门铸造有限公司 | Core molding sand containing spherical quartz and preparation method of core molding sand |
| CN104841850A (en) * | 2015-04-25 | 2015-08-19 | 青阳县三联铸业有限责任公司 | High temperature resistant molding sand and preparation method thereof |
| CN105903886A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | High-quality molding sand |
| CN105903887A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | High-performance green sand |
| CN105903890A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | Easily-collapsing green sand |
| CN106836312A (en) * | 2017-03-15 | 2017-06-13 | 西北大学 | A kind of method of modifying for improving loess barrier performance |
| CN107598092A (en) * | 2017-09-29 | 2018-01-19 | 湖北荆安汽车零部件有限公司 | It is a kind of to be used to make core of wheel hub and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797625A (en) * | 2010-03-12 | 2010-08-11 | 厦门大学 | Method for improving strength of molding sand |
| CN102310157A (en) * | 2011-10-13 | 2012-01-11 | 李华山 | Blending ratio of mud core molding sand |
| CN102527920A (en) * | 2012-02-28 | 2012-07-04 | 河南科技大学 | Preparation method for molding sand used for non-ferrous metal |
| CN103042158A (en) * | 2012-12-25 | 2013-04-17 | 马鞍山市万鑫铸造有限公司 | High crush-resistance moulding sand and preparation method thereof |
| CN103272990A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand comprising cyan sand as main material and manufacturing method thereof |
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
-
2013
- 2013-10-16 CN CN201310481181.XA patent/CN103521691A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797625A (en) * | 2010-03-12 | 2010-08-11 | 厦门大学 | Method for improving strength of molding sand |
| CN102310157A (en) * | 2011-10-13 | 2012-01-11 | 李华山 | Blending ratio of mud core molding sand |
| CN102527920A (en) * | 2012-02-28 | 2012-07-04 | 河南科技大学 | Preparation method for molding sand used for non-ferrous metal |
| CN103042158A (en) * | 2012-12-25 | 2013-04-17 | 马鞍山市万鑫铸造有限公司 | High crush-resistance moulding sand and preparation method thereof |
| CN103272990A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Molding sand comprising cyan sand as main material and manufacturing method thereof |
| CN103272988A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | High-tensile strength molding sand and manufacturing method |
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: "《实用铸件重力成型技术》", 31 October 2003, 化学工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226889A (en) * | 2014-09-24 | 2014-12-24 | 河南省西峡汽车水泵股份有限公司 | Casting molding sand with regenerated dedusting ash and preparation technology of casting molding sand |
| CN104646595A (en) * | 2015-01-22 | 2015-05-27 | 安徽省繁昌县皖南阀门铸造有限公司 | Core molding sand containing spherical quartz and preparation method of core molding sand |
| CN104841850A (en) * | 2015-04-25 | 2015-08-19 | 青阳县三联铸业有限责任公司 | High temperature resistant molding sand and preparation method thereof |
| CN105903886A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | High-quality molding sand |
| CN105903887A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | High-performance green sand |
| CN105903890A (en) * | 2016-05-26 | 2016-08-31 | 合肥市田源精铸有限公司 | Easily-collapsing green sand |
| CN106836312A (en) * | 2017-03-15 | 2017-06-13 | 西北大学 | A kind of method of modifying for improving loess barrier performance |
| CN107598092A (en) * | 2017-09-29 | 2018-01-19 | 湖北荆安汽车零部件有限公司 | It is a kind of to be used to make core of wheel hub and preparation method thereof |
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Application publication date: 20140122 |