CN103521684A - Corundum-mullite modified molding sand and preparation method thereof - Google Patents
Corundum-mullite modified molding sand and preparation method thereof Download PDFInfo
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- CN103521684A CN103521684A CN201310481173.5A CN201310481173A CN103521684A CN 103521684 A CN103521684 A CN 103521684A CN 201310481173 A CN201310481173 A CN 201310481173A CN 103521684 A CN103521684 A CN 103521684A
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Abstract
The invention provides corundum-mullite modified molding sand. The corundum-mullite modified molding sand is prepared from the following raw materials in parts by weight: 60-70 parts of corundum-mullite sand, 200-240 parts of quartz sand, 100-120 parts of chromite sand, 2-3 parts of paraffin oil, 1-2 parts of teflon, 1-2 parts of zirconium anhydride, 1-2 parts of slaked lime, 18-25 parts of gypsum, 10-15 parts of nanometer attapulgite, 3-5 parts of phenolic resin, 1-2 parts of benzene sulfonic acid and a proper amount of water. The corundum-mullite modified molding sand has the advantages that as the surface of the used corundum-mullite sand is circular, a binding agent and auxiliary materials can be saved in a preparation process, the production cost is reduced, the air permeability of the molding sand is improved, the gas yield is reduced, and the quality of castings is improved; and the molding sand has good plasticity and high-temperature collapsibility by the addition of high polymer materials such as Teflon through grinding and dispersing, so that the operation is simple and convenient, the rate of finished products is increased, and the economic benefits are increased.
Description
Technical field
The present invention relates to a kind of casting field, relate in particular to a kind of corundum-mullite modification 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 corundum-mullite modification molding sand and preparation method thereof, this molding sand has high gas permeability, reduces the feature of gas forming amount.
Technical scheme of the present invention is as follows:
A modification molding sand, is characterized in that being made by the raw material of following weight portion: corundum-mullite sand 60-70, quartz sand 200-240, chromite sand 100-120, paraffin oil 2-3, polytetrafluoroethylene (PTFE) 1-2, zirconium dioxide 1-2, calcium hydroxide 1-2, gypsum 18-25, nano-attapulgite 10-15, phenolic resins 3-5, benzene sulfonic acid 1-2, water are appropriate;
The preparation method of described corundum-mullite modification molding sand, it is characterized in that comprising the following steps: corundum-mullite sand, quartz sand, chromite sand are put into 490-520 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 200-400 order powder, then add paraffin oil, calcium hydroxide, 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; Polytetrafluoroethylene (PTFE), zirconium dioxide, gypsum are mixed, and grinding distribution 30-45 minute, obtains after 100-150 powder material, mixes 10-15 minute and get final product with calcining material, other residual components.
Beneficial effect of the present invention
The present invention uses corundum-mullite sand, because its surface is rounded, thereby in manufacturing process, can save binding agent and auxiliary material, has reduced production cost, and has improved type sand permeability, has reduced gas forming amount, has improved casting quality; In conjunction with adding the macromolecular materials such as polytetrafluoroethylene (PTFE), through grinding distribution, make molding sand there is good plasticity, and high temperature collapsibility, make easy and simple to handlely, improve yield rate, increase economic efficiency.
The specific embodiment
A modification molding sand, by following weight portion (kilogram) raw material make: corundum-mullite sand 65, quartz sand 230, chromite sand 110, paraffin oil 2.5, polytetrafluoroethylene (PTFE) 1.5, zirconium dioxide 1.5, calcium hydroxide 1.5, gypsum 22, nano-attapulgite 13, phenolic resins 4, benzene sulfonic acid 1.4, water are appropriate;
The preparation method of described corundum-mullite modification molding sand, comprise the following steps: corundum-mullite sand, quartz sand, chromite sand are put into 500 ℃ of calcining furnaces and calcine 4.5 hours, then, take out, be ground into 300 order powder, then add paraffin oil, calcium hydroxide, suitable quantity of water, dispersed with stirring, pugging, sends in 1480 ℃ of calcining furnaces and calcines 4.4 hours, taking-up is crushed to 80 orders, obtains calcining material; Polytetrafluoroethylene (PTFE), zirconium dioxide, gypsum are mixed, and grinding distribution 40 minutes, obtains after 130 powder materials, mixes 12 minutes 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: 0.94Mpa, air penetrability: 115%, hot green tensile strength: 438Kpa, shatter index: 84%.
Claims (2)
1. a corundum-mullite modification molding sand, is characterized in that being made by the raw material of following weight portion: corundum-mullite sand 60-70, quartz sand 200-240, chromite sand 100-120, paraffin oil 2-3, polytetrafluoroethylene (PTFE) 1-2, zirconium dioxide 1-2, calcium hydroxide 1-2, gypsum 18-25, nano-attapulgite 10-15, phenolic resins 3-5, benzene sulfonic acid 1-2, water are appropriate.
2. the preparation method of corundum-mullite modification molding sand according to claim 1, it is characterized in that comprising the following steps: corundum-mullite sand, quartz sand, chromite sand are put into 490-520 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 200-400 order powder, then add paraffin oil, calcium hydroxide, 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; Polytetrafluoroethylene (PTFE), zirconium dioxide, gypsum are mixed, and grinding distribution 30-45 minute, obtains after 100-150 powder material, mixes 10-15 minute and get final product with calcining material, other residual components.
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| CN201310481173.5A CN103521684A (en) | 2013-10-16 | 2013-10-16 | Corundum-mullite modified molding sand and preparation method thereof |
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| CN201310481173.5A CN103521684A (en) | 2013-10-16 | 2013-10-16 | Corundum-mullite modified molding sand and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057011A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for loam core and preparation method of casting molding sand |
| CN104475660A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Rare earth-containing foundry molding sand and preparation method thereof |
| 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 |
| CN104646597A (en) * | 2015-01-22 | 2015-05-27 | 安徽省繁昌县皖南阀门铸造有限公司 | High-permeability foundry molding sand and preparation method thereof |
| CN105033167A (en) * | 2015-07-06 | 2015-11-11 | 安徽三联泵业股份有限公司 | Modified pump body casting foundry sand with furan resin loaded with nanosized graphite |
| CN105618667A (en) * | 2015-12-30 | 2016-06-01 | 青岛博泰美联化工技术有限公司 | Refractory casting sand |
| CN105665614A (en) * | 2016-02-17 | 2016-06-15 | 安徽索立德铸业有限公司 | Casting sand for casting sand mold and preparing method of casting sand |
| CN105728647A (en) * | 2016-03-08 | 2016-07-06 | 安徽省大吕精机有限公司 | Anti-impact mold and manufacturing method thereof |
| CN106001387A (en) * | 2016-06-07 | 2016-10-12 | 含山县朝霞铸造有限公司 | Sand core material for copper part casting and preparation method of sand core material |
| CN106391991A (en) * | 2016-10-24 | 2017-02-15 | 马鞍山顺发机械制造有限公司 | Brightener for casting |
| CN113477878A (en) * | 2021-06-18 | 2021-10-08 | 广西玉柴机器股份有限公司 | Special molding sand for 3D printing of diesel engine cylinder cover sand core |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057011B (en) * | 2014-05-28 | 2016-08-24 | 安徽鑫润新型材料有限公司 | A kind of loam core casting sand and preparation method thereof |
| CN104057011A (en) * | 2014-05-28 | 2014-09-24 | 安徽鑫润新型材料有限公司 | Casting molding sand for loam core and preparation method of casting molding sand |
| CN104475660A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Rare earth-containing foundry molding sand and preparation method thereof |
| 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 |
| CN104646597A (en) * | 2015-01-22 | 2015-05-27 | 安徽省繁昌县皖南阀门铸造有限公司 | High-permeability foundry molding sand and preparation method thereof |
| CN105033167A (en) * | 2015-07-06 | 2015-11-11 | 安徽三联泵业股份有限公司 | Modified pump body casting foundry sand with furan resin loaded with nanosized graphite |
| CN105618667A (en) * | 2015-12-30 | 2016-06-01 | 青岛博泰美联化工技术有限公司 | Refractory casting sand |
| CN105618667B (en) * | 2015-12-30 | 2018-12-14 | 韶关市晟发有色金属有限公司 | A kind of fire resisting casting sand |
| CN105665614A (en) * | 2016-02-17 | 2016-06-15 | 安徽索立德铸业有限公司 | Casting sand for casting sand mold and preparing method of casting sand |
| CN105665614B (en) * | 2016-02-17 | 2018-07-06 | 安徽索立德铸业有限公司 | A kind of sand casting casting model powder and preparation method thereof |
| CN105728647A (en) * | 2016-03-08 | 2016-07-06 | 安徽省大吕精机有限公司 | Anti-impact mold and manufacturing method thereof |
| CN105728647B (en) * | 2016-03-08 | 2018-03-20 | 广州番禺昌森五金制品有限公司 | A kind of shock resistance mould |
| CN106001387A (en) * | 2016-06-07 | 2016-10-12 | 含山县朝霞铸造有限公司 | Sand core material for copper part casting and preparation method of sand core material |
| CN106001387B (en) * | 2016-06-07 | 2017-10-27 | 含山县朝霞铸造有限公司 | A kind of copper piece foundry sand core material and preparation method thereof |
| CN106391991A (en) * | 2016-10-24 | 2017-02-15 | 马鞍山顺发机械制造有限公司 | Brightener for casting |
| CN113477878A (en) * | 2021-06-18 | 2021-10-08 | 广西玉柴机器股份有限公司 | Special molding sand for 3D printing of diesel engine cylinder cover sand core |
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Application publication date: 20140122 |