CN103100642A - Method for preparing casting molding sand by doping municipal inorganic refuse - Google Patents
Method for preparing casting molding sand by doping municipal inorganic refuse Download PDFInfo
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- CN103100642A CN103100642A CN2012105270489A CN201210527048A CN103100642A CN 103100642 A CN103100642 A CN 103100642A CN 2012105270489 A CN2012105270489 A CN 2012105270489A CN 201210527048 A CN201210527048 A CN 201210527048A CN 103100642 A CN103100642 A CN 103100642A
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Abstract
The invention discloses a method for preparing casting molding sand by doping municipal inorganic refuse. According to the method, the casting molding sand is prepared from the following ingredients in parts by weight: 22-30 parts of municipal inorganic refuse particles, 32-44 parts of plant ash particles, 6-8 parts of bentonite, 4-6 parts of gypsum, 5-6 parts of carboxymethyl cellulose, 1-3 parts of sodium bicarbonate and 80-120 parts of water; the method comprises the following steps: adding the weighed ingredients into a reaction kettle, stirring, mixing, heating to the temperature of 120-145 DEG C, maintaining for 2-3 hours, pouring a mixed material out of the reaction kettle, airing or drying the mixed material, and processing the mixed material into a powder preparation. According to the method, cast parts produced from the molding sand prepared by the method are low in gas evolution, short in drying time, good in gas permeability and high in dry tensile strength; the demolding property of the molding sand can be improved, and the sensibility of the molding sand to moisture during pouring can be reduced; and meanwhile, the defects of sand fusion, sand inclusion, sand washover, gas pores and the like of the cast parts are remarkably improved, so that the degree of finish of the cast parts can be further improved.
Description
Technical field
The present invention relates to the casting sand preparation method, specifically belong to a kind of method of the city inorganic refuse casting sand processed that adulterates.
Background technology
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.The effect of molding sand in Foundry Production is very important, and the casting wasted product that causes 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, have higher intensity and heat endurance, to bear the effect of various external force and high temperature.2, good mobility, namely molding sand is in the ability that mutually moves between sand grains under external force or Action of Gravity Field own.3, certain plasticity, namely 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, namely the molding sand hole sees through the ability of gas.5, high collapsibility weighs up again grittiness, and namely whether molding sand easily destroys after casting solidification, the performance of whether easily removing from foundry goods.
Summary of the invention
A kind of method that the purpose of this invention is to provide city inorganic refuse casting sand processed that adulterates, effectively utilize the quick short steps fiber, the foundry goods gas forming amount that this molding sand is produced is little, drying time is short, good permeability, baked tensile strength are high, and can improve the release property of sand mold, when reducing cast to the sensitiveness of moisture, simultaneously the defectives such as the scab of foundry goods, burning into sand, sand washing, pore are had significantly and improve, can make foundry goods further improve fineness.
Technical scheme of the present invention is as follows:
a kind of method of the city inorganic refuse casting sand processed that adulterates, following component by following weight portion meter forms: city inorganic refuse particle 22-30 part, plant ash particle 32-44 part, bentonite 6-8 part, gypsum 4-6 part, carboxymethyl cellulose 5-6 part, stone flour 2-3, waste ceramic powder 5-8, deposed brick slag powder 3-5, sodium acid carbonate 1-3 part, water 80-120 part, with above-mentioned load weighted raw material except the plant ash particle, add in reactor and mix, and be heated to 120-145 ℃, duration is 2-3 hour, then the composite material in reactor is poured out, dry or dry and be processed into pulvis, mix with the plant ash particle again, namely make, described city inorganic refuse particle is that the city inorganic refuse is used 20-25% salt acid soak 3-4 hour, the deionized water washing, soaked 3-4 hour with the 15-17% sodium tripolyphosphate solution again, extremely neutral with the deionized water washing again, the process pulverizer is ground into Powdered, and city inorganic refuse granularity is controlled to be 4-6mm, starch paste, the sodium phosphate trimer powder of 5-9%, suitable quantity of water that described plant ash particle adopts plant ash to add and is equivalent to its weight 5-8% are mixed rear granulation and get final product.
Described city inorganic refuse granularity is controlled to be 5mm.
Preparation method of the present invention has following beneficial effect:
1, moulding-sand property of the present invention well specifically, in casting process, the foundry goods gas forming amount that adopts this molding sand to produce is little, drying time is short, good permeability, baked tensile strength are high, and can improve the release property of sand mold, when reducing cast to the sensitiveness of moisture, simultaneously the defectives such as the scab of foundry goods, burning into sand, sand washing, pore are had significantly and improve, can make foundry goods further improve fineness.
2, the raw material that uses and prepare burden nontoxic, harmless, pollution-freely, do not adopt coal dust, the workshop is clean, it is few to pollute; Adopt renewable raw materials, cost is low, without pungent smell, without the powdery inhalation (inhalatio), belongs to the novel environment friendly founding materials during cast.
The specific embodiment
a kind of method of the city inorganic refuse casting sand processed that adulterates, following component by following weight portion (kilogram) meter forms: 22 parts of city inorganic refuse particles, 44 parts of plant ash particles, 6 parts of bentonites, 4 parts, gypsum, 6 parts of carboxymethyl celluloses, stone flour 2-3, 5 parts, waste ceramic powder, 3 parts, deposed brick slag powder, 1 part of sodium acid carbonate, 120 parts, water, with above-mentioned load weighted raw material except the plant ash particle, add in reactor and mix, and be heated to 120-145 ℃, duration is 2-3 hour, then the composite material in reactor is poured out, dry or dry and be processed into pulvis, mix with the plant ash particle again, namely make, the water that adds 4-5% weight during use mixes.Described city inorganic refuse particle is that the city inorganic refuse is used 20-25% salt acid soak 3-4 hour, the deionized water washing, soaked 3-4 hour with the 15-17% sodium tripolyphosphate solution again, extremely neutral with the deionized water washing again, the process pulverizer is ground into Powdered, and city inorganic refuse granularity is controlled to be 4-6mm; Described plant ash particle employing plant ash adds the starch paste that is equivalent to its weight 5%, 5% sodium phosphate trimer powder, suitable quantity of water mix rear granulation and get final product.City inorganic refuse granularity is controlled to be 5mm.Sneaking into the mixing of 3-5% water during use gets.
Utilize the technique detection performance of the casting sand of the inventive method production to be:
Green compression strength (MPa): 0.127-0.192
Gas permeability 96
Hot green tensile strength (KPa): 510-530
Shatter index (j): 81-83%.
Claims (2)
1. method of city inorganic refuse casting sand processed of adulterating, it is characterized in that, following component by following weight portion meter forms: city inorganic refuse particle 22-30 part, plant ash particle 32-44 part, bentonite 6-8 part, gypsum 4-6 part, carboxymethyl cellulose 5-6 part, stone flour 2-3, waste ceramic powder 5-8, deposed brick slag powder 3-5, sodium acid carbonate 1-3 part, water 80-120 part, with above-mentioned load weighted raw material except the plant ash particle, add in reactor and mix, and be heated to 120-145 ℃, duration is 2-3 hour, then the composite material in reactor is poured out, dry or dry and be processed into pulvis, mix with the plant ash particle again, namely make, described city inorganic refuse particle is that the city inorganic refuse is used 20-25% salt acid soak 3-4 hour, the deionized water washing, soaked 3-4 hour with the 15-17% sodium tripolyphosphate solution again, extremely neutral with the deionized water washing again, the process pulverizer is ground into Powdered, and city inorganic refuse granularity is controlled to be 4-6mm, starch paste, the sodium phosphate trimer powder of 5-9%, suitable quantity of water that described plant ash particle adopts plant ash to add and is equivalent to its weight 5-8% are mixed rear granulation and get final product.
2. the method for doping city inorganic refuse according to claim 1 casting sand processed, is characterized in that, described city inorganic refuse granularity is controlled to be 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527048.9A CN103100642B (en) | 2012-12-10 | 2012-12-10 | A kind of method of the urban inorganic garbage casting sand that adulterates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527048.9A CN103100642B (en) | 2012-12-10 | 2012-12-10 | A kind of method of the urban inorganic garbage casting sand that adulterates |
Publications (2)
| Publication Number | Publication Date |
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| CN103100642A true CN103100642A (en) | 2013-05-15 |
| CN103100642B CN103100642B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210527048.9A Active CN103100642B (en) | 2012-12-10 | 2012-12-10 | A kind of method of the urban inorganic garbage casting sand that adulterates |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495698A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | High-strength moulding sand and preparation method thereof |
| CN103521692A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Molding sand for casting aluminum and preparation method thereof |
| CN104139153A (en) * | 2014-07-28 | 2014-11-12 | 宁国市大泉机械有限公司 | Environment-friendly foundry sand |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5680343A (en) * | 1979-12-01 | 1981-07-01 | Daihatsu Motor Co Ltd | Additive for molding sand for green sand mold |
| CN101468382A (en) * | 2007-12-24 | 2009-07-01 | 西峡县内燃机进排气管有限责任公司 | Mould sand |
| CN101927315A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | Moulding sand for casting noumenal cast product |
| CN101934345A (en) * | 2010-09-02 | 2011-01-05 | 吴江市液铸液压件铸造有限公司 | Molding sand for casting ductile iron casting |
| CN102371331A (en) * | 2011-10-10 | 2012-03-14 | 辛培兴 | Molding sand for casting gray iron |
-
2012
- 2012-12-10 CN CN201210527048.9A patent/CN103100642B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5680343A (en) * | 1979-12-01 | 1981-07-01 | Daihatsu Motor Co Ltd | Additive for molding sand for green sand mold |
| CN101468382A (en) * | 2007-12-24 | 2009-07-01 | 西峡县内燃机进排气管有限责任公司 | Mould sand |
| CN101934345A (en) * | 2010-09-02 | 2011-01-05 | 吴江市液铸液压件铸造有限公司 | Molding sand for casting ductile iron casting |
| CN101927315A (en) * | 2010-09-03 | 2010-12-29 | 吴江市液铸液压件铸造有限公司 | Moulding sand for casting noumenal cast product |
| CN102371331A (en) * | 2011-10-10 | 2012-03-14 | 辛培兴 | Molding sand for casting gray iron |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495698A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | High-strength moulding sand and preparation method thereof |
| CN103521692A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Molding sand for casting aluminum and preparation method thereof |
| CN104139153A (en) * | 2014-07-28 | 2014-11-12 | 宁国市大泉机械有限公司 | Environment-friendly foundry sand |
| CN104139153B (en) * | 2014-07-28 | 2016-08-17 | 宁国市大泉机械有限公司 | A kind of environment-friendlymolding molding sand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103100642B (en) | 2016-01-20 |
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