CN104815951A - Winnowing and magnetic separation method and device for reclaimed foundry sand - Google Patents
Winnowing and magnetic separation method and device for reclaimed foundry sand Download PDFInfo
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- CN104815951A CN104815951A CN201510198006.9A CN201510198006A CN104815951A CN 104815951 A CN104815951 A CN 104815951A CN 201510198006 A CN201510198006 A CN 201510198006A CN 104815951 A CN104815951 A CN 104815951A
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Abstract
The invention relates to a winnowing and magnetic separation method and device for reclaimed foundry sand. Old molding sand containing sand grains, dust and ferrochrome particles are respectively subjected to magnetic separation, winnowing and screening in a cylinder, the ferrochrome particles are separated out of in the magnetic separation process, dust is separated out in the winnowing process, and sand grains with the grain size meeting the specified requirement are separated out in the screening process. A dry type magnetic separation cylinder is fixed to the middle of the cylinder and can rotate around a rotating shaft, and a backflow type guide plate is arranged in the cylinder at the upper portion of the dry type magnetic separation cylinder. At least two screens are arranged in the throwing-out direction of the dry type magnetic separation cylinder, a blower nozzle is formed in the cylinder corresponding to the lower end of the upper-portion screen I and connected with an air blower, a compressed air purge device is arranged in the cylinder under the lower-portion screen II, and a sand discharging port is formed in the bottom of the cylinder. An ash discharge bin is arranged under the screen II, and an ash discharge port is formed in the bottom of the ash discharge bin. The winnowing and magnetic separation method and device can optimize the grain size composition of reclaimed sand while magnetic separation, the phenolic resin and curing agent liquid using amount can be decreased and the quality of the molding sand can be improved during repeated usage.
Description
Technical field
The present invention relates to a kind of reclaim equiment of foundry sand, particularly relate to a kind of casting reclaimed sand wind magnetic selection method and equipment.
Background technology
Casting industry is the basic activity in manufacturing industry, and China's castings production per ton will discharge waste sand about 1 ton, and year discharge casting waste sand more than 3,000 ten thousand tons, resource consumption and environmental pollution are all very surprising.And while enterprise's discharge a large amount of casting waste sand, enterprise need supplement the fresh sand of equivalent to maintain production line operation to production line, the fresh sand purchase cost that the annual whole nation is caused thus and cost of transportation reach 10,000,000,000 yuan, bring huge financial burden to enterprise, bring immense pressure also to the resources and environment of China.Therefore, process and the recycling of casting waste sand have become current problem in the urgent need to address.
Foundry sand has comparatively strict restriction surmising on composition, and the partially thin sand of granularity is unfavorable for recycling of reclaimed sand, and because moulding needs the ferrochrome particle added to enter in reclaimed sand and reuses in casting process.Reclaimed sand conventional at present selects sand equipment as shown in Figure 1, and it utilizes dry type low intensity magnetic separation cylinder to be separated ferrochrome particle by own magnetic force, utilizes deduster to be sucked in ash silo by dust (the above particulate of 270 order).Cast the sand grains primary particle size used and should be greater than 30 orders, and this sand grains selecting sand equipment to isolate to be less than 30 order particle diameters and cannot to siphon away with deduster, make that fine sand in reclaimed sand is on the high side, dustiness is large, the requirement of casting to fineness of sand, mo ld void and sand-mould quality cannot be met.
Summary of the invention
The invention provides a kind of casting reclaimed sand wind magnetic selection method and equipment, adopt the mode that magnetic separation in an equipment, selection by winnowing and screening combine, reach the object being separated ferrochrome particle, dust and fine sand from casting reclaimed sand, optimize the granularmetric composition of reclaimed sand, it can reduce alkali phenolic resins and curing agent liquid material use amount when reusing, improve the quality of casting sand type.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of casting reclaimed sand wind magnetic selection method, legacy sand containing sand grains, dust and ferrochrome particle in cylindrical shell respectively through magnetic separation, selection by winnowing and screening, magnetic separation process isolates ferrochrome particle, and winnowing process isolates dust, and screening process isolates the sand grains that particle diameter is less than regulation requirement.
Specifically comprise the steps:
1) the legacy sand containing sand grains, dust and ferrochrome particle enters in cylindrical shell by top, drops on dry type magnetic separation cylinder after Zigzag type deflector water conservancy diversion;
2) ferrochrome granular absorption is separated by dry type magnetic separation cylinder, and the hybrid particles of other sand grains and dust is thrown on the screen cloth one that is obliquely installed, fine sand after screen cloth one filters is blown off on the screen cloth two be obliquely installed by air blast, and the more fine sand after screen cloth two filters again is discharged in grey bag outside ash discharging hole;
3) upwards purge from the compressed air of hybrid particles of screen cloth one top landing, dust wherein moves upward and enters cleaning shaft by the dust removal port on cylindrical shell top;
4) sand grains after dedusting is regenerated foundry sand, is entered in finished bin by cylindrical shell bottom sand removing hole.
The order number of described screen cloth one is 20 ~ 40 orders, and the order number of screen cloth two is 60 ~ 80 orders.
For realizing a kind of equipment casting reclaimed sand wind magnetic selection method, comprise cylindrical shell, dry type magnetic separation cylinder, air blast and compressed air blowing cleaner, described dry type magnetic separation cylinder is fixed in the middle part of cylindrical shell, and the moving axis that can rotate rotates, and is provided with Zigzag type deflector in the cylindrical shell on dry type magnetic separation cylinder top; The direction that throws away along dry type magnetic separation cylinder is provided with at least twice screen cloth, and the cylindrical shell that upper screen one lower end is corresponding is established blast orifice connect air blast, establish compressed air blowing cleaner in the cylindrical shell below lower screen two, cylinder body bottom establishes sand removing hole; Establishing ash discharge storehouse below screen cloth two, is ash discharging hole bottom ash discharge storehouse.
Described cylindrical shell top and top, ash discharge storehouse are equipped with dust removal port and connect outside cleaning shaft.
Described compressed air blowing cleaner is made up of the number row scavenging conduit stretched in cylindrical shell, and scavenging conduit is provided with the gas hole of dense arrangement, the external air compressor of compressed air blowing cleaner.
Compared with prior art, the invention has the beneficial effects as follows:
Adopt the mode that magnetic separation in an equipment, selection by winnowing and screening combine, reach the object being separated ferrochrome particle, dust and fine sand from casting reclaimed sand, optimize the granularmetric composition of reclaimed sand, it can reduce alkali phenolic resins and curing agent liquid material use amount when reusing, improve the quality of casting sand type.
Accompanying drawing explanation
Fig. 1 is the existing structural representation selecting sand equipment of the present invention.
Fig. 2 is the structural representation of wind magnetic plant of the present invention.
Fig. 3 is the A-A sectional view in Fig. 2.
In figure: 1. ash discharge storehouse, charging aperture 2. dust removal port 3. cylindrical shell 4. Zigzag type deflector 5. dry type magnetic separation cylinder 6. magnetic separation barrel drive unit 7. screen cloth 1 screen cloth 2 9. ash discharge storehouse 10. dust removal port 11. ash discharging hole 12. air blast 13. compressed air blowing cleaner 131. scavenging conduit 132. gas hole 14. sand removing hole
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
One casting reclaimed sand wind magnetic selection method of the present invention, legacy sand containing sand grains, dust and ferrochrome particle in cylindrical shell 3 respectively through magnetic separation, selection by winnowing and screening, magnetic separation process isolates ferrochrome particle, winnowing process isolates dust, and screening process isolates the sand grains that particle diameter is less than regulation requirement.
Specifically comprise the steps:
1) the legacy sand containing sand grains, dust and ferrochrome particle enters in cylindrical shell 3 by top, drops on dry type magnetic separation cylinder 5 after Zigzag type deflector 4 water conservancy diversion;
2) ferrochrome granular absorption is separated by dry type magnetic separation cylinder 5, and the hybrid particles of other sand grains and dust is thrown on the screen cloth 1 that is obliquely installed, fine sand after screen cloth 1 filters is blown off on the screen cloth 28 be obliquely installed by air blast 12, and the more fine sand after screen cloth 28 filters again is discharged in grey bag outside ash discharging hole 11;
3) upwards purge from the compressed air of hybrid particles of screen cloth 1 top landing, dust wherein moves upward and enters cleaning shaft by the dust removal port 2 on cylindrical shell 3 top;
4) sand grains after dedusting is regenerated foundry sand, is entered in finished bin by cylindrical shell 3 bottom sand removing hole 14.
The order number of described screen cloth 1 is 20 ~ 40 orders, and the order number of screen cloth 28 is 60 ~ 80 orders.
See Fig. 2-Fig. 3, it is structural representation of the present invention, for realizing a kind of equipment casting reclaimed sand wind magnetic selection method, comprise cylindrical shell 3, dry type magnetic separation cylinder 5, air blast 12 and compressed air blowing cleaner 13, described dry type magnetic separation cylinder 5 is fixed in the middle part of cylindrical shell 3, and the moving axis that can rotate rotates, and is provided with Zigzag type deflector 4 in the cylindrical shell 3 on dry type magnetic separation cylinder 3 top; The direction that throws away along dry type magnetic separation cylinder 5 is provided with at least twice screen cloth, the cylindrical shell 3 that upper screen 1 lower end is corresponding is established blast orifice connect air blast 12, establishes compressed air blowing cleaner 13, establish sand removing hole 14 bottom cylindrical shell 3 in the cylindrical shell 3 below lower screen 28; Establishing ash discharge storehouse 9 below screen cloth 28, is ash discharging hole 11 bottom ash discharge storehouse 9.
Described cylindrical shell 3 top and top, ash discharge storehouse 9 are equipped with dust removal port 2/10 and connect outside cleaning shaft.
Described compressed air blowing cleaner 13 is made up of the number row scavenging conduit 131 stretched in cylindrical shell 3, and scavenging conduit 131 is provided with the gas hole 132 of dense arrangement, the external air compressor of compressed air blowing cleaner 13.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment]
In the present embodiment, cylindrical shell 3 is divided into upper and lower two parts, dry type magnetic separation cylinder 5 is fixed on top cylindrical shell and lower cylinder boundary, off-axis side is arranged, dry type magnetic separation cylinder 5 is rotated clockwise around trunnion axis by chain-driving by drive unit 6, be provided with twice screen cloth 7,8 along in the lower cylinder 3 in its direction of dishing out, twice screen cloth 7,8 is all obliquely installed, and its plane orthogonal is in the tangent to periphery direction of dry type magnetic separation cylinder 5.Wherein superposed screen cloth 1 is 30 eye mesh screens, and the lower screen 28 be arranged in parallel with screen cloth 1 is 70 eye mesh screens.
The lower end of screen cloth 1 is unsettled, concordant place, its lower end and be just provided with blast orifice to the lower cylinder 3 of screen cloth 1, connects air blast 12 by airduct.Screen cloth 28 be arranged on lower cylinder 3 side ash discharge storehouse 9 enter interruption-forming close be connected, be provided with ash discharging hole 11 bottom ash discharge storehouse 9, top is provided with dust removal port 10 and is connected with deduster by pipeline.Also the dust removal port 2 that is provided with of top cylindrical shell 3 is connected with deduster.The fine sand filtered through screen cloth 28 and dust granule are siphoned away by external particulate dirt gathering-device through ash discharging hole 11, and are displaced in grey bag.
In the present embodiment, compressed air blowing cleaner 13 is made up of three groups of scavenging conduits 131 side by side, and stretch on the scavenging conduit 131 in cylindrical shell 3 and offer intensive gas hole 132, scavenging conduit 131 other end connects air compressor by airduct.
In the present embodiment, the purging pressure of cfentrifugal blower 12 is about 0.15Mpa, the hybrid particles fallen can be purged to screen cloth 28 filter from screen cloth 1.Compressed-air actuated pressure is about 0.5Mpa, the dust contained and fine sand grain upwards can be blown from screen cloth 28 in the old sand fallen, and makes it discharge outside cylindrical shell 3 eventually through dust removal port 2.Sand grains more than particle diameter 30 order can not be moved by wind, directly drops to bottom cylindrical shell 3, and is discharged in finished bin as reclaimed sand finished product by sand removing hole 14.
In the present embodiment, in the reclaimed sand finished product after the magnetic separation of wind magnetic separator equipment, selection by winnowing, screening, the sand grains of particle diameter more than 30 orders accounts for more than 97% of granularmetric composition, meets Foundry Production requirement completely.
Claims (6)
1. a casting reclaimed sand wind magnetic selection method, it is characterized in that, legacy sand containing sand grains, dust and ferrochrome particle in cylindrical shell respectively through magnetic separation, selection by winnowing and screening, magnetic separation process isolates ferrochrome particle, winnowing process isolates dust, and screening process isolates the sand grains that particle diameter is less than regulation requirement.
2. one casting reclaimed sand wind magnetic selection method according to claim 1, specifically comprises the steps:
1) the legacy sand containing sand grains, dust and ferrochrome particle enters in cylindrical shell by top, drops on dry type magnetic separation cylinder after Zigzag type deflector water conservancy diversion;
2) ferrochrome granular absorption is separated by dry type magnetic separation cylinder, and the hybrid particles of other sand grains and dust is thrown on the screen cloth one that is obliquely installed, fine sand after screen cloth one filters is blown off on the screen cloth two be obliquely installed by air blast, and the more fine sand after screen cloth two filters again is discharged in grey bag outside ash discharging hole;
3) upwards purge from the compressed air of hybrid particles of screen cloth one top landing, dust wherein moves upward and enters cleaning shaft by the dust removal port on cylindrical shell top;
4) sand grains after dedusting is regenerated foundry sand, is entered in finished bin by cylindrical shell bottom sand removing hole.
3. one casting reclaimed sand wind magnetic selection method according to claim 2, it is characterized in that, the order number of described screen cloth one is 20 ~ 40 orders, and the order number of screen cloth two is 60 ~ 80 orders.
4. for realizing a kind of equipment casting reclaimed sand wind magnetic selection method described in claim 1 or 2, it is characterized in that, comprise cylindrical shell, dry type magnetic separation cylinder, air blast and compressed air blowing cleaner, described dry type magnetic separation cylinder is fixed in the middle part of cylindrical shell, and the moving axis that can rotate rotates, and is provided with Zigzag type deflector in the cylindrical shell on dry type magnetic separation cylinder top; The direction that throws away along dry type magnetic separation cylinder is provided with at least twice screen cloth, and the cylindrical shell that upper screen one lower end is corresponding is established blast orifice connect air blast, establish compressed air blowing cleaner in the cylindrical shell below lower screen two, cylinder body bottom establishes sand removing hole; Establishing ash discharge storehouse below screen cloth two, is ash discharging hole bottom ash discharge storehouse.
5. one casting reclaimed sand wind magnetic plant according to claim 4, it is characterized in that, described cylindrical shell top and top, ash discharge storehouse are equipped with dust removal port and connect outside cleaning shaft.
6. one casting reclaimed sand wind magnetic plant according to claim 4, it is characterized in that, described compressed air blowing cleaner is made up of the number row scavenging conduit stretched in cylindrical shell, and scavenging conduit is provided with the gas hole of dense arrangement, the external air compressor of compressed air blowing cleaner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510198006.9A CN104815951B (en) | 2015-04-23 | 2015-04-23 | A kind of casting reclaimed sand wind magnetic selection method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510198006.9A CN104815951B (en) | 2015-04-23 | 2015-04-23 | A kind of casting reclaimed sand wind magnetic selection method and equipment |
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| CN104815951A true CN104815951A (en) | 2015-08-05 |
| CN104815951B CN104815951B (en) | 2017-01-04 |
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| CN201510198006.9A Active CN104815951B (en) | 2015-04-23 | 2015-04-23 | A kind of casting reclaimed sand wind magnetic selection method and equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170897A (en) * | 2015-09-08 | 2015-12-23 | 宁国市南方耐磨材料有限公司 | Sand mold recovery device |
| CN107755083A (en) * | 2017-10-16 | 2018-03-06 | 镇江远大传动机械有限公司 | One kind removes iron construction |
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| CN201168766Y (en) * | 2008-01-16 | 2008-12-24 | 潍坊华星铸造机械有限公司 | Clay sand regeneration complete equipment |
| CN101773981A (en) * | 2010-03-05 | 2010-07-14 | 昆明理工大学 | Method for mechanically combining and regenerating casting clay-resin mixed used sand |
| CN202162331U (en) * | 2011-07-27 | 2012-03-14 | 安徽省宁国新宁实业有限公司 | Old cast sand recovery and processing equipment |
| CN102886493A (en) * | 2012-10-11 | 2013-01-23 | 沈阳创达技术交易市场有限公司 | Foundry sand separator |
| 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 |
| CN204700237U (en) * | 2015-04-23 | 2015-10-14 | 辽宁福鞍重工股份有限公司 | A kind of casting reclaimed sand wind magnetic plant |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201168766Y (en) * | 2008-01-16 | 2008-12-24 | 潍坊华星铸造机械有限公司 | Clay sand regeneration complete equipment |
| CN101773981A (en) * | 2010-03-05 | 2010-07-14 | 昆明理工大学 | Method for mechanically combining and regenerating casting clay-resin mixed used sand |
| CN202162331U (en) * | 2011-07-27 | 2012-03-14 | 安徽省宁国新宁实业有限公司 | Old cast sand recovery and processing equipment |
| CN102886493A (en) * | 2012-10-11 | 2013-01-23 | 沈阳创达技术交易市场有限公司 | Foundry sand separator |
| 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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105170897A (en) * | 2015-09-08 | 2015-12-23 | 宁国市南方耐磨材料有限公司 | Sand mold recovery device |
| CN107755083A (en) * | 2017-10-16 | 2018-03-06 | 镇江远大传动机械有限公司 | One kind removes iron construction |
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| CN104815951B (en) | 2017-01-04 |
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