CN103128228A - Comprehensive recycling method of waste sand in green casting - Google Patents
Comprehensive recycling method of waste sand in green casting Download PDFInfo
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- CN103128228A CN103128228A CN2011103902329A CN201110390232A CN103128228A CN 103128228 A CN103128228 A CN 103128228A CN 2011103902329 A CN2011103902329 A CN 2011103902329A CN 201110390232 A CN201110390232 A CN 201110390232A CN 103128228 A CN103128228 A CN 103128228A
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- mechanical friction
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- magnetic separation
- green casting
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- 239000004576 sand Substances 0.000 title claims abstract description 57
- 238000005266 casting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004064 recycling Methods 0.000 title abstract description 4
- 239000002699 waste material Substances 0.000 title abstract 5
- 238000007885 magnetic separation Methods 0.000 claims abstract description 20
- 238000009835 boiling Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 8
- 230000008929 regeneration Effects 0.000 claims description 18
- 238000011069 regeneration method Methods 0.000 claims description 18
- 239000006148 magnetic separator Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 238000004898 kneading Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 42
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000001172 regenerating effect Effects 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 239000003516 soil conditioner Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention relates to a comprehensive recycling method of waste sand in green casting, and belongs to the field of novel casting processes. The comprehensive recycling method of the waste sand in green casting is characterized in that the waste sand in green casting is recycled through the following steps: a first level of magnetic separation and smashing, a second level of magnetic separation, screening, dewatering and drying, a first level of mechanical friction demoulding, a first level of winnowing and dedusting, a second level of winnowing and dedusting, a third level of mechanical friction demoulding, a third level of boiling, dedusting and screening; and finally qualified recycled sand is obtained. A permanent magnet belt magnetic separation machine is used in the first magnetic separation of the waste sand, a three-return-stroke roller dryer is adopted during dewatering and drying, a suspension-type magnetic separation machine is adopted in the second level magnetic separation, centrifugal mechanical friction demoulding is adopted in the first level of mechanical friction demoulding and the second level of mechanical friction demoulding, streaming mode winnowing and a pulse-bag-type dedusting machine are adopted in the first level of winnowing and dedusting and the second level of winnowing and dedusting, vortex kneading demoulding is adopted in the three level of mechanical friction demoulding, and a fluidized bed and the pulse-bag-type dedusting machine are adopted in the third level of boiling and dedusting.
Description
Technical field
The regeneration comprehensive that the present invention relates to antiquated sand in a kind of green casting utilizes method, belongs to the New Casting Technique field.
Background technology
Foundry industry is the indispensable industry of machine building industry.Wherein the proportion of sand casting accounts for 80%-90%.At present, China's foundry goods annual production is more than 1,000 ten thousand tons, and the circulation sand using amount is up to 10,000 ten thousand tons.The rate of recovery of old sand generally can reach 80%-90%, and the 10%-20% of circulation old sand will constantly discard.With discarded 10% calculating, the 1 year discarded old sand in the whole nation is exactly 1,000 ten thousand tons, namely produces 1 ton of foundry goods and need to replenish 1 ton of fresh sand, again discarded 1 ton of old sand.In casting, mostly be high grade quartz sand with sand, yet, China's high grade quartz sand resource relative shortage, therefore old sand being regenerated becomes an important step of casting industry sustainable development.Regenerating used is the new results of natural resources recycling, is important measures that reduce costs, improve casting quality, environmental contamination reduction and economize on resources.
In the west, the exploration of regenerating used technology was just begun before 100 years.In developed countries such as Britain, Germany, Japan and the U.S., this technology has had large-scale system applies, professional sand conditioning equipment for self-hardening sands such as clay-bonded sand and water-glass sand and resin sands has come into operation in a large number, and has obtained economic benefit and social benefit preferably.In China, the development of regenerating used technology is relatively backward, and regenerative process very complicated cost is higher, so use less.Along with raising and the improvement of the level of the productive forces and social environment, China's casting industry undoubtedly should be gone on antiquated sand regeneration road.
Summary of the invention
According to the deficiencies in the prior art, the technical problem to be solved in the present invention is: provide the regeneration comprehensive of antiquated sand in a kind of green casting to utilize method, the solid waste that casting is produced is effectively utilized, and has both reduced the production cost of foundry enterprise, solves again the discharging of solid waste to the pollution of environment.
The technical solution adopted for the present invention to solve the technical problems is: provide the regeneration comprehensive of antiquated sand in a kind of green casting to utilize method, it is characterized in that the antiquated sand in green casting regenerates through following steps: 1 grade of magnetic separation, fragmentation, 2 grades of magnetic separation, screening, dewatered drying, 1 grade of mechanical friction demoulding, light breeze blanking dirt, 2 grades of mechanical friction demouldings, gentle breeze blanking dirt, 3 grades of mechanical friction demouldings, 3 grades of boiling dedustings and screenings obtain qualified reclaimed sand at last.
The permanent magnetism magnetic belt separator is used in described 1 grade of magnetic separation.
Suspended magnetic separator is adopted in described 2 grades of magnetic separation.
Described dewatered drying adopts three-pass rotary drum formula dryer.
Described 1 grade of 2 grades of mechanical friction demoulding adopts centrifugal mechanical friction demoulding.
Described 1 grade of gentle breeze blanking dirt adopts stream mode sorting and pulse bag formula deduster.
Described 3 grades of mechanical friction demouldings adopt eddy current to rub demoulding.
Ebullated bed and pulse bag formula deduster are adopted in described 3 grades of boiling dedustings.
Antiquated sand in green casting is reduced to below 6% through clay content after regenerating, and burning decrement can continue to be applied to green casting production lower than 3%, replaces the fresh sand of adding.
The recovery dust that regeneration produces is for the production of soil conditioner and organic fertilizer.
The invention has the beneficial effects as follows:
(1) the permanent magnetism magnetic belt separator is used in 1 of the antiquated sand process grade of magnetic separation, dewatered drying adopts three-pass rotary drum formula dryer, suspended magnetic separator is adopted in 2 grades of magnetic separation, 1 grade of 2 grades of mechanical friction demoulding adopts centrifugal mechanical friction demoulding, 1 grade of gentle breeze blanking dirt adopts stream mode sorting and pulse bag formula deduster, 3 grades of mechanical friction demouldings adopt eddy current to rub demoulding, and ebullated bed and pulse bag formula deduster are adopted in 3 grades of boiling dedustings.
(2) antiquated sand is reduced to below 6% through clay content after regenerating, and burning decrement can continue to be applied to green casting production lower than 3%, replaces the fresh sand of adding.And because the reclaimed sand coefficient of expansion is less, the bleb of production, burning into sand defective obviously reduce, and casting yield significantly improves.
(3) the recovery dust of regeneration generation simultaneously is for the production of soil conditioner and organic fertilizer, and effect is better.
The specific embodiment
Below in conjunction with embodiment, the present invention is described further
Embodiment 1
Antiquated sand is the old sand that the single cylinder diesel engine body Foundry Production is eliminated, before regeneration, clay content was 31% (comprising the differential such as effective bentonite, effective coal dust, inert dust), burning decrement is 6.5%, 1 grade of magnetic separation, fragmentation, 2 grades of magnetic separation, screening, dewatered drying, 1 grade of mechanical friction demoulding, light breeze blanking dirt, 2 grades of mechanical friction demouldings, gentle breeze blanking dirt, 3 grades of mechanical friction demouldings, 3 grades of boiling dedustings and screenings obtain qualified reclaimed sand at last.
The permanent magnetism magnetic belt separator is used in 1 grade of magnetic separation.
Suspended magnetic separator is adopted in 2 grades of magnetic separation.
Dewatered drying adopts three-pass rotary drum formula dryer.
1 grade and 2 grades of mechanical friction demouldings employing centrifugal mechanical friction demouldings.
1 grade and the employing stream mode sorting of gentle breeze blanking dirt and pulse bag formula deduster.
3 grades of mechanical friction demouldings adopt eddy current to rub demoulding.
Ebullated bed and pulse bag formula deduster are adopted in 3 grades of boiling dedustings.
Be 5.5% through clay content after this technique regeneration, burning decrement is 1.8%.With the production electric machinery foundry goods of this reclaimed sand 100% addition, yield rate reaches 98%.
Embodiment 2
Product is motor part end cap, single-piece weight 30kg, material casting pig (HT250), clay-bonded sand wet type technique, machine molding.Molding sand proportion is eliminated 30% antiquated sand for adding fresh sand 30%.Antiquated sand obtains reclaimed sand after through the step in embodiment 1, fully recovering after regeneration, and fresh sand only adds 3%, moulding cost 15% left and right, the moulding-sand property of mixed system is green compression strength 0.16MPa, gas permeability is 158 units, reaches technological requirement.
Embodiment 3
Product is casing, single-piece weight 85kg, and material HT250 clay-bonded sand wet type technique, machine molding, core is also clay-bonded sand.Originally foundry goods core sand after knockout is all eliminated, after step in use embodiment 1 is regenerated now, still as the sand of using of core, addition 100%, the core of making meets technological requirement fully, the box casting of producing does not produce the core defectives such as fire, burning into sand of choking, and is inner without any defective after processing.
Claims (8)
1. in a green casting, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that the antiquated sand in green casting regenerates through following steps: 1 grade of magnetic separation, fragmentation, 2 grades of magnetic separation, screening, dewatered drying, 1 grade of mechanical friction demoulding, light breeze blanking dirt, 2 grades of mechanical friction demouldings, gentle breeze blanking dirt, 3 grades of mechanical friction demouldings, 3 grades of boiling dedustings and screenings obtain qualified reclaimed sand at last.
2. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 1 grade of magnetic separation use permanent magnetism magnetic belt separator.
3. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 2 grades of magnetic separation employing suspended magnetic separator.
4. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described dewatered drying adopts three-pass rotary drum formula dryer.
5. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 1 grade and 2 grades of mechanical friction demouldings employing centrifugal mechanical friction demouldings.
6. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 1 grade and the employing stream mode sorting of gentle breeze blanking dirt and pulse bag formula deduster.
7. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 3 grades of mechanical friction demouldings adopt eddy current to rub demoulding.
8. in green casting according to claim 1, the regeneration comprehensive of antiquated sand utilizes method, it is characterized in that described 3 grades of boiling dedustings employing ebullated beds and pulse bag formula deduster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110390232.9A CN103128228B (en) | 2011-11-30 | 2011-11-30 | The regeneration comprehensive Application way of antiquated sand in green casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110390232.9A CN103128228B (en) | 2011-11-30 | 2011-11-30 | The regeneration comprehensive Application way of antiquated sand in green casting |
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| Publication Number | Publication Date |
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| CN103128228A true CN103128228A (en) | 2013-06-05 |
| CN103128228B CN103128228B (en) | 2015-10-28 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521699A (en) * | 2013-10-21 | 2014-01-22 | 青岛和德隆机械有限公司 | Regeneration system of used clay sand |
| CN105964902A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Casting sand recycling technology of clay green sand mould |
| CN106378415A (en) * | 2016-08-29 | 2017-02-08 | 山西永益铸管股份有限公司 | Pipe casting waste sand recovery method |
| CN106862498A (en) * | 2017-03-03 | 2017-06-20 | 马鞍山市兴隆铸造有限公司 | A kind of high intensity anchor plate preparation technology |
| CN106915011A (en) * | 2015-04-09 | 2017-07-04 | 武汉蓝格包装材料有限公司 | A kind of Sound-proof material waste recovery Application way |
| CN107159837A (en) * | 2017-05-31 | 2017-09-15 | 华中科技大学 | A kind of drum-type old sand wet reclamation and dewatering integrated equipment and its application method |
| CN107635693A (en) * | 2015-06-11 | 2018-01-26 | 新东工业株式会社 | The renovation process of molding sand and again generating apparatus |
| CN108296432A (en) * | 2017-08-25 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of recycling cast waste sand technique |
| CN110918873A (en) * | 2019-11-20 | 2020-03-27 | 江门市汇坤科技有限公司 | Casting waste sand recovery system and method |
| CN111054887A (en) * | 2020-01-17 | 2020-04-24 | 吴广 | A environment-friendly equipment for abandonment molding sand is retrieved |
| CN113941451A (en) * | 2021-10-19 | 2022-01-18 | 柳晶科技集团(常州)股份有限公司 | Method for electrostatic separation casting of coal dust in fly ash |
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| JPS5152324A (en) * | 1975-09-02 | 1976-05-08 | Mitsubishi Motors Corp | Imonozunano saiseihoho |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106915011A (en) * | 2015-04-09 | 2017-07-04 | 武汉蓝格包装材料有限公司 | A kind of Sound-proof material waste recovery Application way |
| CN107635693A (en) * | 2015-06-11 | 2018-01-26 | 新东工业株式会社 | The renovation process of molding sand and again generating apparatus |
| CN105964902A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Casting sand recycling technology of clay green sand mould |
| CN106378415A (en) * | 2016-08-29 | 2017-02-08 | 山西永益铸管股份有限公司 | Pipe casting waste sand recovery method |
| CN106862498A (en) * | 2017-03-03 | 2017-06-20 | 马鞍山市兴隆铸造有限公司 | A kind of high intensity anchor plate preparation technology |
| CN107159837A (en) * | 2017-05-31 | 2017-09-15 | 华中科技大学 | A kind of drum-type old sand wet reclamation and dewatering integrated equipment and its application method |
| CN108296432A (en) * | 2017-08-25 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of recycling cast waste sand technique |
| CN108296432B (en) * | 2017-08-25 | 2020-01-10 | 柳州市柳晶科技股份有限公司 | Regeneration process of waste foundry sand |
| CN110918873A (en) * | 2019-11-20 | 2020-03-27 | 江门市汇坤科技有限公司 | Casting waste sand recovery system and method |
| CN111054887A (en) * | 2020-01-17 | 2020-04-24 | 吴广 | A environment-friendly equipment for abandonment molding sand is retrieved |
| CN113941451A (en) * | 2021-10-19 | 2022-01-18 | 柳晶科技集团(常州)股份有限公司 | Method for electrostatic separation casting of coal dust in fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103128228B (en) | 2015-10-28 |
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Denomination of invention: Recycling and comprehensive utilization of waste sand in Wet Mold Casting Effective date of registration: 20220518 Granted publication date: 20151028 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yiyuan county subbranch Pledgor: SHANDONG YUANTONG MACHINERY Co.,Ltd. Registration number: Y2022980005705 |
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Date of cancellation: 20230620 Granted publication date: 20151028 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yiyuan county subbranch Pledgor: SHANDONG YUANTONG MACHINERY Co.,Ltd. Registration number: Y2022980005705 |
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Denomination of invention: A Comprehensive Utilization Method for Recycling Waste Sand in Wet Mold Casting Effective date of registration: 20231025 Granted publication date: 20151028 Pledgee: China postal savings bank, Yiyuan County branch, Limited by Share Ltd. Pledgor: SHANDONG YUANTONG MACHINERY Co.,Ltd. Registration number: Y2023980062646 |