CN104226889B - Casting molding sand with regenerated dedusting ash and preparation technology of casting molding sand - Google Patents
Casting molding sand with regenerated dedusting ash and preparation technology of casting molding sand Download PDFInfo
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- CN104226889B CN104226889B CN201410490775.1A CN201410490775A CN104226889B CN 104226889 B CN104226889 B CN 104226889B CN 201410490775 A CN201410490775 A CN 201410490775A CN 104226889 B CN104226889 B CN 104226889B
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Abstract
The invention discloses casting molding sand with regenerated dedusting ash and a preparation technology of the casting molding sand. The molding sand comprises 80-88 parts of used sand, 3-6 parts of the dedusting ash, 10-13 parts of new sand, 1-3 parts of slaked lime and the balance of water, wherein the dedusting ash comprises 20-25% of bentonites and 5-8% of coal powder; the used sand is recycled silica sand; the new sand further comprises 2-3 parts of clay and 2-3 parts of the coal powder. The casting molding sand comprises the components in parts by weight and the balance of water. Through the adoption of the molding sand disclosed by the invention, the dedusting ash is recycled, so that the environmental pollution is reduced; at the same time, the bentonites and the coal powder are added to be used for recycling the used sand, and the new additions are reduced, so that the cost is reduced; adding the slaked lime to the newly combined molding sand, so that not only the air permeability, the compaction and the plasticity are improved, but also the fire resistance and the deformability are improved; the molding sand and the preparation technology, disclosed by the invention, are worth of popularization and application.
Description
Technical field
The invention belongs to casting sand recovery technology field is and in particular to a kind of cast dedusting ash regenerated foundry sand and its preparation
Technique.
Background technology
Casting model powder is for preparing a kind of particulate refractory of molding sand and core sand, Er Qieyou in foundry production
Need substantial amounts of casting model powder in casting process, granularity and coefficient all diminishes so that it can be taken out dirt after recycling
Machine is taken away, then as garbage disposal, but needs to add bentonite and coal in casting model powder to produce qualified foundry goods
The compounds such as powder, it then airborne dust can make it be taken out dirt machine to take away in removal process, but finds after being checked wherein to contain
The bentonite of 25%-30% and effective coal dust, bentonite primarily serves cementation so that casting model powder is stereotyped；And coal dust is permissible
Prevent foundry goods from producing scab, surface roughness also can be made to significantly reduce；A kind of resin is disclosed in CN100500325C
The recoverying and utilizing method of old sand, comprises the following steps：Using resin bonded sand through after broken, screening process as to damp clay sand supplement
The fresh sand adding, on the premise of in ensureing green sand, minimum coal dust content is not less than 0.3%, adding according to resin bonded sand
Enter amount and calculate the addition reducing coal dust, corresponding calculating formula is as follows:△W cp = Wrs× Grs/Gcp;Wherein △ W cp table
Show the coal dust addition of minimizing, units/kg, Wrs represents the addition of resin bonded sand, units/kg, Grs represents sending out of resin bonded sand
Tolerance, units/ml/g, Gcp represents the gas forming amount of coal dust, units/ml/g.For it is only for the recycling of old sand, and
Dedusting ash is not recycled it is therefore desirable to a kind of cast dedusting ash regenerated foundry sand preparation technology.
Content of the invention
The present invention is to make up the deficiencies in the prior art, provides and a kind of reduce environmental pollution, reduces manufacturing cost and right
Dedusting ash makes full use of molding sand and preparation technology.
The technical scheme being adopted to achieve these goals：A kind of casting dedusting ash regenerated foundry sand, including old sand, dedusting
Ash, fresh sand and Calx, described dedusting ash includes the coal dust of 20-25% bentonite and 5-8%, and described old sand is to reclaim silica sand,
Described fresh sand also includes clay and coal dust, the interpolation number of described old sand, dedusting ash, fresh sand and Calx：Old sand 80-88 part,
Dedusting ash 3-6 part, fresh sand 10-13 part, Calx 1-3 part, clay 2-3, coal dust 2-3, remaining is water.
The composition portion rate of described casting dedusting ash regenerated foundry sand：88 parts of old sand, 5 parts of dedusting ash, 12 parts of fresh sand, Calx
1 part, 2 parts of clay, 3 parts of coal dust, remaining is moisture.
A kind of preparation technology of casting dedusting ash regenerated foundry sand：
A. dedusting ash is tested and analyzed, to obtain wherein coal dust and bentonitic content with this, then by dedusting ash
Carry out classified storage；
B. old sand is analyzed, then needs to add the amount of dedusting ash according to technique, be subsequently adding mixing in puddle mixer
Uniformly；
C. new casting model powder and old sand are carried out 10-20S is dry mixed, be subsequently adding water purification and carry out wet mixing conjunction 20-40S；
D. the Calx that quality is gross weight 0.025% and 10 parts of water are added to carry out wet mixing and close 45-75S, then standby.
The invention discloses a kind of molding sand being manufactured using dedusting ash in casting, it was that the dedusting ash of waste material is again sharp originally
With being again added in the old sand of recovery so that it can be added thereto as bentonite and coal dust, it is old that it can reduce recovery
The clay supplementing in sand and the addition of coal dust, reduce operation cost；Simultaneously when adding fresh sand to carry out mix and blend,
Add a small amount of Calx, increased conjugation but so that breathability is declined, its overall performance has obtained very big
Lifting.
Research to garbage dedusting ash aborning, finds wherein to contain coal dust and bentonite, concurrently existing effective ingredient
Content is the bentonite of content 20-25% and the coal dust of 5-8% content, due to itself being that powder is making after high temperature
Itself is stained with glutinous with molding sand or is condensed into block, is changed into floating dust, if it enters in the air not after casting is broken
Only contaminated air and also cause the serious waste of resource；By in precipitator dust reclaim to storage tank, and its constituent is had
Body is analyzed, thus obtaining accurate composition, then old sand being carried out screening, a series of process so that it can go such as pulverizes, sieves
Except the impurity in old sand, and ensure the granularity of silica sand, can possess very high fire resistance and breathability thus ensure that during cast,
The Calx adding can further function as the content of objectionable impurities S in abjection cast；Then according to the needs of production technology
Add dedusting ash, and be added into being mixed to puddle mixer；Then fresh sand is added in old sand mixture and carry out 10- is dry mixed
20S about time, be subsequently adding 5 parts of water and carry out wet mixing and close 20-40S, be subsequently adding the ripe stone that quality is gross weight 0.025%
Ash carries out mixing 45-75S again with 10 parts of water, then piles up standby.
Beneficial effects of the present invention：Precipitator dust reclaim is utilized, decreases the pollution of environment, be also the recovery of old sand simultaneously
Using with the addition of bentonite and coal dust, decreasing new addition, reducing cost；Add Calx in the molding sand of Combination nova,
Such that it does not increased aeration, the degree of packing and plasticity, and also improve fire resistance and deformability；It is worthy to be popularized and answer
With.
Specific embodiment：
In order to the superiority of the present invention is described, using different sand moldings and detect various performance parameters to a collection of foundry goods
As follows：
| Cost | Aeration | Compact rate of molding | |
| Fresh sand | 5 | 110 | 40% |
| Conventional mixed sand does not add Calx | 4 | 103 | 34% |
| Conventional mixed sand does not add dedusting ash | 4 | 101 | 30% |
| The present invention | 2 | 130 | 45% |
Note：Conventional mixed sand is old sand+fresh sand+bentonite+coal dust, and cost adopts 1-5 to be incremented by.
As can be seen from the above table good effect is all reached using aeration, compact rate of molding during all fresh sands, but become
Ben Taigao；Dedusting ash is not added using conventional mixed sand and does not add Calx, its cost slightly declines, but aeration and compact rate of molding
Decline, but substantially reduced using cost of the present invention, but aeration and compact rate of molding are obtained for very big raising so that its energy
Enough realize minimum cost to put into, realize the molding sand of optimal effect of casting.
Embodiment one：A kind of casting dedusting ash regenerated foundry sand, including old sand, dedusting ash, fresh sand and Calx, described dedusting
Ash includes the coal dust of 20-25% bentonite and 5-8%, and described old sand is to reclaim silica sand, and described fresh sand also includes clay and coal dust,
The interpolation number of described old sand, dedusting ash, fresh sand and Calx：Old sand 80-88 part, dedusting ash 3-6 part, fresh sand 10-13 part, ripe
Calx 1-3 part, clay 2-3, coal dust 2-3, remaining is water.
The composition portion rate of described casting dedusting ash regenerated foundry sand：88 parts of old sand, 5 parts of dedusting ash, 12 parts of fresh sand, Calx
1 part, 2 parts of clay, 3 parts of coal dust, remaining is moisture.
A kind of preparation technology of casting dedusting ash regenerated foundry sand：
A. dedusting ash is tested and analyzed, to obtain wherein coal dust and bentonitic content with this, then by dedusting ash
Carry out classified storage；
B. old sand is analyzed, then needs to add the amount of dedusting ash according to technique, be subsequently adding mixing in puddle mixer
Uniformly；
C. new casting model powder and old sand are carried out 10-20S is dry mixed, be subsequently adding water purification and carry out wet mixing conjunction 20-40S；
D. the Calx that quality is gross weight 0.025% and 10 parts of water are added to carry out wet mixing and close 45-75S, then standby.
Obtain compact rate of molding be 44-46%, aeration be 125-135 casting dedusting ash regenerated foundry sand.
Embodiment two：A kind of casting dedusting ash regenerated foundry sand, including old sand, dedusting ash, fresh sand and Calx, described dedusting
Ash includes 20% bentonite and 5% coal dust, and described old sand is to reclaim silica sand, and described fresh sand also includes clay and coal dust, described
The interpolation number of old sand, dedusting ash, fresh sand and Calx：82 parts of old sand, 6 parts of dedusting ash, 13 parts of fresh sand, 3 parts of Calx, clay
2, coal dust 2, remaining is water.
A kind of preparation technology of casting dedusting ash regenerated foundry sand：
A. dedusting ash is tested and analyzed, to obtain wherein coal dust and bentonitic content with this, then by dedusting ash
Carry out classified storage；
B. old sand is analyzed, then needs to add the amount of dedusting ash according to technique, be subsequently adding mixing in puddle mixer
Uniformly；
C. new casting model powder and old sand are carried out 20S is dry mixed, be subsequently adding water purification and carry out wet mixing conjunction 35S；
D. the Calx that quality is gross weight 0.025% and 10 parts of water are added to carry out wet mixing and close 60S, then standby.
Obtain compact rate of molding be 45%, aeration be 129 casting dedusting ash regenerated foundry sand.
Embodiment two：A kind of casting dedusting ash regenerated foundry sand, including old sand, dedusting ash, fresh sand and Calx, described dedusting
Ash includes 20% bentonite and 5% coal dust, and described old sand is to reclaim silica sand, and described fresh sand also includes clay and coal dust, described
The interpolation number of old sand, dedusting ash, fresh sand and Calx：82 parts of old sand, 6 parts of dedusting ash, 13 parts of fresh sand, 3 parts of Calx, clay
2, coal dust 2, remaining is water.
A kind of preparation technology of casting dedusting ash regenerated foundry sand：
A. dedusting ash is tested and analyzed, to obtain wherein coal dust and bentonitic content with this, then by dedusting ash
Carry out classified storage；
B. old sand is analyzed, then needs to add the amount of dedusting ash according to technique, be subsequently adding mixing in puddle mixer
Uniformly；
C. new casting model powder and old sand are carried out 20S is dry mixed, be subsequently adding water purification and carry out wet mixing conjunction 35S；
D. the Calx that quality is gross weight 0.025% and 10 parts of water are added to carry out wet mixing and close 60S, then standby.
Obtain compact rate of molding be 45%, aeration be 129 casting dedusting ash regenerated foundry sand.
Embodiment three：A kind of casting dedusting ash regenerated foundry sand, including old sand, dedusting ash, fresh sand and Calx, described dedusting
Ash includes 23% bentonite and 6% coal dust, and described old sand is to reclaim silica sand, and described fresh sand also includes clay and coal dust, described
The interpolation number of old sand, dedusting ash, fresh sand and Calx：85 parts of old sand, 4 parts of dedusting ash, 11 parts of fresh sand, 2.5 parts of Calx, glues
Soil 2, coal dust 2, remaining is water.
A kind of preparation technology of casting dedusting ash regenerated foundry sand：
E. dedusting ash is tested and analyzed, to obtain wherein coal dust and bentonitic content with this, then by dedusting ash
Carry out classified storage；
F. old sand is analyzed, then needs to add the amount of dedusting ash according to technique, be subsequently adding mixing in puddle mixer
Uniformly；
G. new casting model powder and old sand are carried out 15s is dry mixed, be subsequently adding water purification and carry out wet mixing conjunction 32s；
H. the Calx that quality is gross weight 0.025% and 10 parts of water are added to carry out wet mixing and close 45s, then standby.
Obtain compact rate of molding be 44%, aeration be 126 casting dedusting ash regenerated foundry sand.
The invention discloses a kind of molding sand being manufactured using dedusting ash in casting, it was that the dedusting ash of waste material is again sharp originally
With being again added in the old sand of recovery so that it can be added thereto as bentonite and coal dust, it is old that it can reduce recovery
The clay supplementing in sand and the addition of coal dust, reduce operation cost；Simultaneously when adding fresh sand to carry out mix and blend,
Add a small amount of Calx, increased conjugation but so that breathability is declined, its overall performance has obtained very big
Lifting.
Research to garbage dedusting ash aborning, finds wherein to contain coal dust and bentonite, concurrently existing effective ingredient
Content is the bentonite of content 20-25% and the coal dust of 5-8% content, due to itself being that powder is making after high temperature
Itself is stained with glutinous with molding sand or is condensed into block, is changed into floating dust, if it enters in the air not after casting is broken
Only contaminated air and also cause the serious waste of resource；By in precipitator dust reclaim to storage tank, and its constituent is had
Body is analyzed, thus obtaining accurate composition, then old sand being carried out screening, a series of process so that it can go such as pulverizes, sieves
Except the impurity in old sand, and ensure the granularity of silica sand, can possess very high fire resistance and breathability thus ensure that during cast,
The Calx adding can further function as the content of objectionable impurities S in abjection cast；Then according to the needs of production technology
Add dedusting ash, and be added into being mixed to puddle mixer；Then fresh sand is added in old sand mixture and carry out 10- is dry mixed
20S about time, be subsequently adding 5 parts of water and carry out wet mixing and close 20-40S, be subsequently adding the ripe stone that quality is gross weight 0.025%
Ash carries out mixing 45-75S again with 10 parts of water, then piles up standby.
Beneficial effects of the present invention：Precipitator dust reclaim is utilized, decreases the pollution of environment, be also the recovery of old sand simultaneously
Using with the addition of bentonite and coal dust, decreasing new addition, reducing cost；Add Calx in the molding sand of Combination nova,
Such that it does not increased aeration, the degree of packing and plasticity, and also improve fire resistance and deformability；It is worthy to be popularized and answer
With.
Claims (2)
1. a kind of casting dedusting ash regenerated foundry sand it is characterised in that：Including old sand, dedusting ash, fresh sand and Calx, described dedusting
Ash includes the coal dust of 20-25% bentonite and 5-8%, and described old sand is to reclaim silica sand, and described casting dedusting ash regenerated foundry sand is also
Including clay and coal dust, the interpolation number of described old sand, dedusting ash, fresh sand, Calx, clay and coal dust：Old sand 80-88 part,
Dedusting ash 3-6 part, fresh sand 10-13 part, Calx 1-3 part, clay 2-3 part, coal dust 2-3 part, 15 parts of water.
2. as claimed in claim 1 casting dedusting ash regenerated foundry sand it is characterised in that：Described casting dedusting ash regenerated foundry sand
Composition portion rate：88 parts of old sand, 5 parts of dedusting ash, 12 parts of fresh sand, 1 part of Calx, 2 parts of clay, 3 parts of coal dust, 15 parts of water.
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| CN107414021A (en) * | 2017-08-12 | 2017-12-01 | 合肥市田源精铸有限公司 | A kind of method that cast used sand prepares regenerated foundry sand |
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| CN1071159C (en) * | 1995-11-08 | 2001-09-19 | 花王株式会社 | Binder composition for casting mould, mould composition and mould manufacturing method |
| CN101934342B (en) * | 2010-09-02 | 2012-06-13 | 吴江市液铸液压件铸造有限公司 | Molding sand for casting pressure plates |
| CN101961767B (en) * | 2010-09-09 | 2012-09-05 | 周道虎 | Formula of brake drum clay sand molding |
| CN102728784B (en) * | 2012-06-08 | 2014-03-12 | 繁昌县琦祥铸造厂 | Clay-type molding sand and preparation method thereof |
| CN103100638B (en) * | 2012-12-10 | 2015-11-25 | 马鞍山市万鑫铸造有限公司 | A kind of method of the silica flour casting sand that adulterates |
| CN103100639B (en) * | 2012-12-10 | 2015-09-09 | 马鞍山市万鑫铸造有限公司 | A kind of preparation method of highly-breathable casting sand |
| CN103521691A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Modified bentonite molding sand and preparation method thereof |
| CN103586399A (en) * | 2013-10-16 | 2014-02-19 | 昌利锻造有限公司 | Molding sand capable of quick air permeation and heat dissipation and preparation method thereof |
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Effective date of registration: 20151214 Address after: Nanyang City, Henan province 474550 Xixia County Private eco industrial park (enter Zhen Shi Mei Long Cun) Applicant after: XIXIA COUNTY XIBENG SPECIAL FOUNDRY CO.,LTD. Address before: 474550 Industrial Zone, East Ring Road, Xixia County, Nanyang, Henan Applicant before: Henan Province Xixia Automobile Water Pump Co.,Ltd. |
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Address after: 474550 private Ecological Industrial Park, Xixia County, Nanyang City, Henan Province (HUICHE Town, Shiti Village) Patentee after: Xixia Feilong Special Casting Co.,Ltd. Address before: 474550 private Ecological Industrial Park, Xixia County, Nanyang City, Henan Province (HUICHE Town, Shiti Village) Patentee before: XIXIA COUNTY XIBENG SPECIAL FOUNDRY CO.,LTD. |
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