CN103586396A - Molding sand for non-ferrous castings and preparation method thereof - Google Patents
Molding sand for non-ferrous castings and preparation method thereof Download PDFInfo
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- CN103586396A CN103586396A CN201310483925.1A CN201310483925A CN103586396A CN 103586396 A CN103586396 A CN 103586396A CN 201310483925 A CN201310483925 A CN 201310483925A CN 103586396 A CN103586396 A CN 103586396A
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Abstract
The invention provides molding sand for non-ferrous castings. The molding sand is prepared from the following raw materials in parts by weight: 40-45 parts of alunite, 13-15 parts of plant ash, 20-30 parts of bentonite, 50-55 parts of mineral waste residue, 40-45 parts of medical stone powder, 12-15 parts of gypsum, 3-4 parts of zinc oxide, 3-5 parts of calcium lignosulphonate, 2-3 parts of diffusing agent MF2, 2-3 parts of polyvinyl alcohol, 1-2 parts of sodium carbonate, 2-3 parts of calcium oxide, 5-8 parts of magnesium oxide, 10-16 parts of aluminum sulfate slag, 5-8 parts of sodium metasilicate, 2-3 parts of glycerol triacetate, 1-2 parts of diethylene glycol benzoate and a proper amount of water. The molding sand prepared by calcining, smashing and carrying out high-temperature calcination on the alunite, the bentonite, the mineral waste residue, the gypsum and the like in combination with the dispersion and grinding of additives such as the calcium lignosulphonate has excellent smoothness, air permeability, caking property, toughness and plasticity. Meanwhile, the collapsibility of the molding sand is improved by using the powder such as the plant ash, the medical stone powder and the aluminum sulfate slag, so that the brightness of non-ferrous metals can be improved.
Description
Technical field
The present invention relates to a kind of casting field, relate in particular to a kind of molding sand for non-ferrous casting 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 molding sand for non-ferrous casting and preparation method thereof, this molding sand has high gas permeability, collapsibility, feature that plasticity is good.
Technical scheme of the present invention is as follows:
For a molding sand for non-ferrous casting, it is characterized in that being made by the raw material of following weight portion: alunite 40-45, plant ash 13-15, bentonite 20-30, slag 50-55, medical stone powder 40-45, gypsum 12-15, zinc oxide 3-4, calcium lignosulfonate 3-5, dispersing agent MF 2-3, polyvinyl alcohol 2-3, sodium carbonate 1-2, calcium oxide 2-3, magnesia 5-8, aluminium sulfate slag 10-16, sodium metasilicate 5-8, triacetin 2-3, diglycol benzoic ether 1-2, water are appropriate;
The preparation method of the described molding sand for non-ferrous casting, it is characterized in that comprising the following steps: alunite, bentonite, slag, gypsum mixed powder are broken into 100-200 order powder, then add zinc oxide, calcium lignosulfonate, dispersing agent MF, triacetin, suitable quantity of water, dispersed with stirring, pugging, send in 1430-1460 ℃ of calcining furnace and calcine 4-5 hour, take out and be crushed to 50-100 order, obtain calcining material; Medical stone powder, calcium oxide, magnesia, sodium metasilicate are mixed, after grinding distribution 20-30 minute, mix with other residual components, add and be equivalent to water wet mixing 10-15 minute of compound weight 3-5% and get final product.
Beneficial effect of the present invention
The present invention has used alunite, bentonite, slag, gypsum etc., through calcining, pulverizing, high-temperature calcination again, combination, adds the auxiliary agent dispersion grinding such as calcium lignosulfonate, makes molding sand have excellent smoothness, gas permeability, caking property, toughness, plasticity; Use the powder such as plant ash, medical stone powder, aluminium sulfate slag simultaneously, increased collapsibility; The present invention, for the production of non-ferrous metal, has improved the brightness of foundry goods greatly.
The specific embodiment
For a molding sand for non-ferrous casting, by following weight portion (kilogram) raw material make: alunite 40-45, plant ash 13-15, bentonite 20-30, slag 50-55, medical stone powder 40-45, gypsum 12-15, zinc oxide 3-4, calcium lignosulfonate 3-5, dispersing agent MF 2-3, polyvinyl alcohol 2-3, sodium carbonate 1-2, calcium oxide 2-3, magnesia 5-8, aluminium sulfate slag 10-16, sodium metasilicate 5-8, triacetin 2-3, diglycol benzoic ether 1-2, water are appropriate;
The preparation method of the described molding sand for non-ferrous casting, it is characterized in that comprising the following steps: alunite, bentonite, slag, gypsum mixed powder are broken into 100-200 order powder, then add zinc oxide, calcium lignosulfonate, dispersing agent MF, triacetin, suitable quantity of water, dispersed with stirring, pugging, send in 1430-1460 ℃ of calcining furnace and calcine 4-5 hour, take out and be crushed to 50-100 order, obtain calcining material; Medical stone powder, calcium oxide, magnesia, sodium metasilicate are mixed, after grinding distribution 20-30 minute, mix with other residual components, add and be equivalent to water wet mixing 10-15 minute of compound weight 3-5% and get final product.
The processing performance of the molding sand that the present invention makes:
Green compression strength: 0.094Mpa, air penetrability: 91%, hot green tensile strength: 368Kpa, shatter index: 81%.
Claims (2)
1. for a molding sand for non-ferrous casting, it is characterized in that being made by the raw material of following weight portion: alunite 40-45, plant ash 13-15, bentonite 20-30, slag 50-55, medical stone powder 40-45, gypsum 12-15, zinc oxide 3-4, calcium lignosulfonate 3-5, dispersing agent MF 2-3, polyvinyl alcohol 2-3, sodium carbonate 1-2, calcium oxide 2-3, magnesia 5-8, aluminium sulfate slag 10-16, sodium metasilicate 5-8, triacetin 2-3, diglycol benzoic ether 1-2, water are appropriate.
2. according to claim 1 for the preparation method of the molding sand of non-ferrous casting, it is characterized in that comprising the following steps: alunite, bentonite, slag, gypsum mixed powder are broken into 100-200 order powder, then add zinc oxide, calcium lignosulfonate, dispersing agent MF, triacetin, suitable quantity of water, dispersed with stirring, pugging, send in 1430-1460 ℃ of calcining furnace and calcine 4-5 hour, take out and be crushed to 50-100 order, obtain calcining material; Medical stone powder, calcium oxide, magnesia, sodium metasilicate are mixed, after grinding distribution 20-30 minute, mix with other residual components, add and be equivalent to water wet mixing 10-15 minute of compound weight 3-5% and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310483925.1A CN103586396A (en) | 2013-10-16 | 2013-10-16 | Molding sand for non-ferrous castings and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310483925.1A CN103586396A (en) | 2013-10-16 | 2013-10-16 | Molding sand for non-ferrous castings and preparation method thereof |
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| CN103586396A true CN103586396A (en) | 2014-02-19 |
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| CN201310483925.1A Pending CN103586396A (en) | 2013-10-16 | 2013-10-16 | Molding sand for non-ferrous castings and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014717A (en) * | 2014-05-29 | 2014-09-03 | 朱小英 | Casting method of ZL101 thin-wall aluminium alloy part |
| CN104057017A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Molding sand for large-size cast piece and preparation method thereof |
| CN104475649A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Small steel cast molding sand and preparation method thereof |
| CN104668443A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Casting precoated sand added with titanium dioxide and preparation method of casting precoated sand |
| CN104841858A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Molding sand for improving surface quality of cast part and preparation method thereof |
| CN105964876A (en) * | 2016-03-10 | 2016-09-28 | 繁昌县琪鑫铸造有限公司 | Benshan green clay type molding sand used for pressure plate casting and a preparing method thereof |
| CN107433319A (en) * | 2017-09-30 | 2017-12-05 | 和县华顺铸造有限公司 | A kind of high-performance environment-friendly casting sand and preparation method thereof |
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| GB1273203A (en) * | 1968-07-31 | 1972-05-03 | Buderus Eisenwerk | Foundry moulding sand |
| US5992499A (en) * | 1997-05-09 | 1999-11-30 | Air Products And Chemicals, Inc. | Method for cold reclamation of foundry sand containing clay |
| US20100269998A1 (en) * | 2009-02-02 | 2010-10-28 | Charles Landis | Modified Bentonites for Advanced Foundry Applications |
| CN102964132A (en) * | 2012-11-07 | 2013-03-13 | 宜昌科博耐火材料有限公司 | Olivine ceramsite sand and preparation method thereof |
| CN103042157A (en) * | 2012-12-25 | 2013-04-17 | 马鞍山市万鑫铸造有限公司 | Yellow soil contained moulding sand and preparation method thereof |
| CN103100648A (en) * | 2012-12-10 | 2013-05-15 | 马鞍山市万鑫铸造有限公司 | Method of doping plant ash to manufacture foundry sand |
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2013
- 2013-10-16 CN CN201310483925.1A patent/CN103586396A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1273203A (en) * | 1968-07-31 | 1972-05-03 | Buderus Eisenwerk | Foundry moulding sand |
| US5992499A (en) * | 1997-05-09 | 1999-11-30 | Air Products And Chemicals, Inc. | Method for cold reclamation of foundry sand containing clay |
| US20100269998A1 (en) * | 2009-02-02 | 2010-10-28 | Charles Landis | Modified Bentonites for Advanced Foundry Applications |
| CN102964132A (en) * | 2012-11-07 | 2013-03-13 | 宜昌科博耐火材料有限公司 | Olivine ceramsite sand and preparation method thereof |
| CN103100648A (en) * | 2012-12-10 | 2013-05-15 | 马鞍山市万鑫铸造有限公司 | Method of doping plant ash to manufacture foundry sand |
| CN103042157A (en) * | 2012-12-25 | 2013-04-17 | 马鞍山市万鑫铸造有限公司 | Yellow soil contained moulding sand and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057017A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Molding sand for large-size cast piece and preparation method thereof |
| CN104057017B (en) * | 2014-05-28 | 2017-11-03 | 河北中和铸造有限公司 | A kind of heavy castings molding sand and preparation method thereof |
| CN104014717A (en) * | 2014-05-29 | 2014-09-03 | 朱小英 | Casting method of ZL101 thin-wall aluminium alloy part |
| CN104475649A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Small steel cast molding sand and preparation method thereof |
| CN104668443A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Casting precoated sand added with titanium dioxide and preparation method of casting precoated sand |
| CN104841858A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Molding sand for improving surface quality of cast part and preparation method thereof |
| CN105964876A (en) * | 2016-03-10 | 2016-09-28 | 繁昌县琪鑫铸造有限公司 | Benshan green clay type molding sand used for pressure plate casting and a preparing method thereof |
| CN107433319A (en) * | 2017-09-30 | 2017-12-05 | 和县华顺铸造有限公司 | A kind of high-performance environment-friendly casting sand and preparation method thereof |
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Application publication date: 20140219 |