CN104057015A - Casting molding sand for non-ferrous metal and preparation method of casting molding sand - Google Patents

Casting molding sand for non-ferrous metal and preparation method of casting molding sand Download PDF

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Publication number
CN104057015A
CN104057015A CN201410229466.9A CN201410229466A CN104057015A CN 104057015 A CN104057015 A CN 104057015A CN 201410229466 A CN201410229466 A CN 201410229466A CN 104057015 A CN104057015 A CN 104057015A
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China
Prior art keywords
parts
molding sand
casting
sand
ferrous metal
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CN201410229466.9A
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Chinese (zh)
Inventor
朱安会
马洪章
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Anhui Xin Run Type Material Co Ltd
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Anhui Xin Run Type Material Co Ltd
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Priority to CN201410229466.9A priority Critical patent/CN104057015A/en
Publication of CN104057015A publication Critical patent/CN104057015A/en
Pending legal-status Critical Current

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Abstract

The invention discloses casting molding sand for non-ferrous metal. The casting molding sand is prepared from the following raw materials in parts by weight: 245-270 parts of quartz sand, 22-28 parts of aluminum-magnesium spinel, 35-40 parts of coal gangue, 3-4 parts of copper oxide, 10-15 parts of wood fiber, 40-45 parts of bamboo leaf powder, 20-30 parts of saw dust, 2-4 parts of carboxymethyl cellulose, 6-9 parts of sodium metasilicate, 2-3 parts of calcium formate, 30-40 parts of glass bead, 2-3 parts of sodium pyrophosphate decahydrate, 3-4 parts of (hydroxy-phosphonooxy-phosphoryl)oxyphosphonic acid, 1-2 parts of zinc borate, 4-5 parts of coal dust, 2-3 parts of soybean oil, 30-35 parts of charcoal and an appropriate amount of water. By calcining aluminum-magnesium spinel and coal gangue at high temperature, the molding sand is stable in structure, high in permeability, high in hardness and high in sphericity. By carbonizing fibers such as wood fiber, the molding sand is high in air permeability and cost-saving. By virtue of glass bead, the collapsibility is improved. The molding sand is used for casting, the phenomena of shrinkage cavities and shrinkage porosity of a casting infrequently occur, the surface of the casting is bright, and the casting yield is improved.

Description

A kind of molding sand used for non-ferrous metal and preparation method thereof
Technical field
The present invention relates to casting field, relate in particular to a kind of molding sand used for non-ferrous metal 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 can be with 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 formed by the mixed system of roughing sand, binding agent, coal dust additive etc. and water, 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, decompose and produce toxic gas and pollute at casting process coal dust firing.
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 uses with clay-bonded sand, water-glass sand and quartz sand 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 giving 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 used for non-ferrous metal and preparation method thereof, this molding sand has the advantages that framework is stable, hardness is high, foundry goods is bright.
Technical scheme of the present invention is as follows:
A kind of molding sand used for non-ferrous metal, is characterized in that being made up of the raw material of following weight portion: quartz sand 245-270, aluminum-spinel 22-28, gangue 35-40, cupric oxide 3-4, wood-fibred 10-15, bamboo leaf powder 40-45, sawdust 20-30, carboxymethyl cellulose 2-4, sodium metasilicate 6-9, calcium formate 2-3, glass bead 30-40, sodium pyrophosphate 2-3, tripolyphosphate ammonium 3-4, Firebrake ZB 1-2, coal dust 4-5, soybean oil 2-3, charcoal 30-35, water are appropriate.
The preparation method of described molding sand used for non-ferrous metal, it is characterized in that comprising the following steps: aluminum-spinel, gangue, wood-fibred, bamboo leaf powder, sawdust are put into 550-570 DEG C of calcining furnace and calcine 3-4 hour, then, take out, be ground into 200-300 order powder, then add calcium formate, cupric oxide, Firebrake ZB, suitable quantity of water, dispersed with stirring, pugging, sends in 1410-1440 DEG C of calcining furnace and calcines 3-5 hour, taking-up is crushed to 50-100 order, obtains calcining material; Methylcellulose, sodium metasilicate, sodium pyrophosphate, tripolyphosphate ammonium, coal dust are mixed, grind 30-40 minute, mix 15-20 minute with calcining material, other residual components, to obtain final product.
Beneficial effect of the present invention
The present invention has used aluminum-spinel, gangue through high-temperature calcination, makes molding sand Stability Analysis of Structures, and good penetrability, hardness are high, good sphericity; By using the fiber carbonizations such as wood-fibred, make sand permeability good, cost-saving; By using glass bead, increase collapsibility.Molding sand of the present invention is for casting, and foundry goods shrinkage cavity and porosity phenomenon is few, and cast(ing) surface light improves casting yield.
Detailed description of the invention
A kind of molding sand used for non-ferrous metal, by following weight portion (kilogram) raw material make: quartz sand 260, aluminum-spinel 25, gangue 37, cupric oxide 3.5, wood-fibred 13, bamboo leaf powder 43, sawdust 25, carboxymethyl cellulose 3, sodium metasilicate 7, calcium formate 2.5, glass bead 35, sodium pyrophosphate 2.5, tripolyphosphate ammonium 3.5, Firebrake ZB 1.5, coal dust 4.5, soybean oil 2.5, charcoal 33, water are appropriate.
The preparation method of described molding sand used for non-ferrous metal, comprise the following steps: aluminum-spinel, gangue, wood-fibred, bamboo leaf powder, sawdust are put into 560 DEG C of calcining furnaces and calcine 3.6 hours, then, take out, be ground into 250 order powder, then add calcium formate, cupric oxide, Firebrake ZB, suitable quantity of water, dispersed with stirring, pugging, sends in 1430 DEG C of calcining furnaces and calcines 4 hours, taking-up is crushed to 70 orders, obtains calcining material; Methylcellulose, sodium metasilicate, sodium pyrophosphate, tripolyphosphate ammonium, coal dust are mixed, grind 35 minutes, mix 18 minutes with calcining material, other residual components, to obtain final product.
The sand test data that the present embodiment obtains are as follows: high temperature compression strength is more than 0.92Mpa, and gas forming amount is lower than below 13.9ml/g, and heat-resistant time 150-180 second, room temperature tensile strength is greater than 0.01Mpa, and hot-drawn intensity is greater than 0.015Mpa.

Claims (2)

1. a molding sand used for non-ferrous metal, is characterized in that being made up of the raw material of following weight portion: quartz sand 245-270, aluminum-spinel 22-28, gangue 35-40, cupric oxide 3-4, wood-fibred 10-15, bamboo leaf powder 40-45, sawdust 20-30, carboxymethyl cellulose 2-4, sodium metasilicate 6-9, calcium formate 2-3, glass bead 30-40, sodium pyrophosphate 2-3, tripolyphosphate ammonium 3-4, Firebrake ZB 1-2, coal dust 4-5, soybean oil 2-3, charcoal 30-35, water are appropriate.
2. the preparation method of molding sand used for non-ferrous metal according to claim 1, it is characterized in that comprising the following steps: aluminum-spinel, gangue, wood-fibred, bamboo leaf powder, sawdust are put into 550-570 DEG C of calcining furnace and calcine 3-4 hour, then, take out, be ground into 200-300 order powder, then add calcium formate, cupric oxide, Firebrake ZB, suitable quantity of water, dispersed with stirring, pugging, sends in 1410-1440 DEG C of calcining furnace and calcines 3-5 hour, taking-up is crushed to 50-100 order, obtains calcining material; Methylcellulose, sodium metasilicate, sodium pyrophosphate, tripolyphosphate ammonium, coal dust are mixed, grind 30-40 minute, mix 15-20 minute with calcining material, other residual components, to obtain final product.
CN201410229466.9A 2014-05-28 2014-05-28 Casting molding sand for non-ferrous metal and preparation method of casting molding sand Pending CN104057015A (en)

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CN201410229466.9A CN104057015A (en) 2014-05-28 2014-05-28 Casting molding sand for non-ferrous metal and preparation method of casting molding sand

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN104525846A (en) * 2014-12-01 2015-04-22 繁昌县恒鑫汽车零部件有限公司 Sand inclusion-preventing cast iron molding sand and preparation method thereof
CN104646600A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-cracking heat-resistant molding sand and preparation method thereof
CN105170877A (en) * 2015-09-15 2015-12-23 蚌埠冠宜型材科技有限公司 Molding sand for casting
CN105798223A (en) * 2016-03-23 2016-07-27 刘建荣 Technology for casting molding sand through coal gangue
CN106077431A (en) * 2016-07-29 2016-11-09 无锡市三峰仪器设备有限公司 A kind of moulding sand for casting of molding sand experimental apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05200478A (en) * 1992-01-28 1993-08-10 Hitachi Metals Ltd Manufacture of spheroidal graphite cast iron
CN102728775A (en) * 2012-06-08 2012-10-17 繁昌县琦祥铸造厂 Molding sand containing wood fiber and production method thereof
CN103042155A (en) * 2012-12-25 2013-04-17 马鞍山市万鑫铸造有限公司 Plant ash contained moulding sand and preparation method thereof
CN103521678A (en) * 2013-10-16 2014-01-22 合肥市田源精铸有限公司 Molding sand capable of increasing brightness of castings and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05200478A (en) * 1992-01-28 1993-08-10 Hitachi Metals Ltd Manufacture of spheroidal graphite cast iron
CN102728775A (en) * 2012-06-08 2012-10-17 繁昌县琦祥铸造厂 Molding sand containing wood fiber and production method thereof
CN103042155A (en) * 2012-12-25 2013-04-17 马鞍山市万鑫铸造有限公司 Plant ash contained moulding sand and preparation method thereof
CN103521678A (en) * 2013-10-16 2014-01-22 合肥市田源精铸有限公司 Molding sand capable of increasing brightness of castings and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN104525846A (en) * 2014-12-01 2015-04-22 繁昌县恒鑫汽车零部件有限公司 Sand inclusion-preventing cast iron molding sand and preparation method thereof
CN104646600A (en) * 2015-01-22 2015-05-27 安徽省繁昌县皖南阀门铸造有限公司 Anti-cracking heat-resistant molding sand and preparation method thereof
CN105170877A (en) * 2015-09-15 2015-12-23 蚌埠冠宜型材科技有限公司 Molding sand for casting
CN105798223A (en) * 2016-03-23 2016-07-27 刘建荣 Technology for casting molding sand through coal gangue
CN106077431A (en) * 2016-07-29 2016-11-09 无锡市三峰仪器设备有限公司 A kind of moulding sand for casting of molding sand experimental apparatus

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Application publication date: 20140924