CN110293206A - Clean sand production technology and system, the method for reclaiming of antiquated sand and system - Google Patents
Clean sand production technology and system, the method for reclaiming of antiquated sand and system Download PDFInfo
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- CN110293206A CN110293206A CN201910714758.4A CN201910714758A CN110293206A CN 110293206 A CN110293206 A CN 110293206A CN 201910714758 A CN201910714758 A CN 201910714758A CN 110293206 A CN110293206 A CN 110293206A
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- 239000004576 sand Substances 0.000 title claims abstract description 493
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000005516 engineering process Methods 0.000 title claims abstract description 46
- 238000009991 scouring Methods 0.000 claims abstract description 176
- 238000007885 magnetic separation Methods 0.000 claims abstract description 127
- 239000000463 material Substances 0.000 claims abstract description 72
- 238000004140 cleaning Methods 0.000 claims abstract description 52
- 238000002203 pretreatment Methods 0.000 claims abstract description 46
- 239000010802 sludge Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims description 97
- 239000010865 sewage Substances 0.000 claims description 50
- 238000001035 drying Methods 0.000 claims description 42
- 238000002156 mixing Methods 0.000 claims description 40
- 238000004062 sedimentation Methods 0.000 claims description 39
- 238000005201 scrubbing Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000006148 magnetic separator Substances 0.000 claims description 31
- 238000004064 recycling Methods 0.000 claims description 25
- 238000012805 post-processing Methods 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 22
- 230000010355 oscillation Effects 0.000 claims description 21
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- 230000005291 magnetic effect Effects 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 17
- 238000007781 pre-processing Methods 0.000 claims description 16
- 238000009826 distribution Methods 0.000 claims description 14
- 238000007790 scraping Methods 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 13
- 230000001172 regenerating effect Effects 0.000 claims description 13
- 230000001376 precipitating effect Effects 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000005189 flocculation Methods 0.000 claims description 10
- 230000016615 flocculation Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000006246 high-intensity magnetic separator Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000872 buffer Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 475
- 239000000377 silicon dioxide Substances 0.000 abstract description 22
- 239000004927 clay Substances 0.000 abstract description 19
- 238000007528 sand casting Methods 0.000 abstract description 5
- 239000000686 essence Substances 0.000 description 15
- 238000003860 storage Methods 0.000 description 15
- 239000012535 impurity Substances 0.000 description 14
- 238000004513 sizing Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 238000005266 casting Methods 0.000 description 11
- 238000011069 regeneration method Methods 0.000 description 11
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- 230000000052 comparative effect Effects 0.000 description 8
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- 238000003756 stirring Methods 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 206010016256 fatigue Diseases 0.000 description 3
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- 230000003139 buffering effect Effects 0.000 description 2
- 239000011469 building brick Substances 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
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- 230000005494 condensation Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
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- 239000013049 sediment Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/02—Dressing by centrifuging essentially or additionally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/18—Plants for preparing mould materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/18—Plants for preparing mould materials
- B22C5/185—Plants for preparing mould materials comprising a wet reclamation step
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides a kind of scouring sand production technology and systems, the method for reclaiming of antiquated sand and system, are related to sand casting technical field.Kind of the invention cleans sand production technology, comprising the following steps: the roughing sand Jing Guo pre-treatment is successively carried out to first time scouring, first time desliming, second scouring, second of desliming, sub-material and wet magnetic separation.The present invention can adequately remove the sludge in roughing sand, sufficient magnetic separation is carried out to the magnetisable material in roughing sand, greatly reduces the clay content and magnetic separation content of material for cleaning sand, improves the dioxide-containing silica for cleaning sand, and simple process, high production efficiency.
Description
Technical field
The invention belongs to sand casting technical fields, and in particular to a kind of scouring sand production technology and system, antiquated sand are again
Raw reuse method and system.
Background technique
Cleaning sand is a kind of Foundry sand, is usually obtained by natural silica Sand through processes such as scouring, washing, classifications
A kind of Foundry sand of the clay content less than 0.5%.The purposes for cleaning sand is more, such as can be used for producing casting precoated sand
Deng the specification of the scouring sand of different purposes would also vary from.
With the fast development of China's foundry industry, the casting output in China was always situated in world forefront in recent years.Wherein, sand
Mold casting is the basic technology in Foundry Production, and the casting of about 80-90% is produced using sand casting process.One side
Face, the raw material employed in sand casting include cleaning sand, that is, sand casting process includes the production technology for cleaning sand.
However, scouring sand production technology in the prior art and system, fail sufficiently to remove the sludge in roughing sand, the scouring caused
The clay content of sand is higher, and dioxide-containing silica is lower, at the same also contain a certain amount of magnetisable material, influence clean sand quality and
Quality.
On the other hand, a large amount of antiquated sand can be generated in the production of casting.Currently, other than a small amount of antiquated sand regeneration,
Most of antiquated sand causes the waste of resource and the pollution of environment as waste discharge.Thus, the regeneration of cast waste sand becomes
The major issue that foundry industry faces.According to cast waste sand different ingredient composition and feature, different regeneration technologies can be selected.One
As for, in the regenerated production process of antiquated sand, collocation between the selection and equipment of regeneration method to the quality of reclaimed sand with
And continuity, the stationarity of production play a key role.However, recycling cast waste sand reuse method in the prior art and being
System, obtained reclaimed sand contain a certain amount of magnetisable material, and the content of silica is lower, and clay content is higher, the matter of reclaimed sand
Measure poor, the quality of reclaimed sand is extremely difficult to the requirement of some casting.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of scouring sand production technology, the technique can reduce clean sand containing mud
Amount reduces magnetisable material content, improves the dioxide-containing silica for cleaning sand, can overcome the above problem or at least partly solve
Certainly above-mentioned technical problem.
The second object of the present invention is to provide a kind of method for reclaiming of antiquated sand, including above-mentioned scouring sand production work
Skill can reduce the clay content of reclaimed sand, reduce magnetisable material content, improve the dioxide-containing silica of reclaimed sand, guarantee regeneration
The quality of sand can overcome the above problem or at least be partially solved above-mentioned technical problem.
The third object of the present invention is to provide a kind of scouring sand production system, the system can reduce clean sand containing mud
Amount reduces magnetisable material content, improves the dioxide-containing silica for cleaning sand, can overcome the above problem or at least partly solve
Certainly above-mentioned technical problem.
The fourth object of the present invention is to provide a kind of system for regenerating and recycling of antiquated sand, including above-mentioned scouring sand production system
System can reduce the clay content of reclaimed sand, reduce magnetisable material content, improve the dioxide-containing silica of reclaimed sand, guarantee regeneration
The quality of sand can overcome the above problem or at least be partially solved above-mentioned technical problem.
To achieve the above object, the technical solution adopted by the present invention are as follows:
According to an aspect of the present invention, the present invention provides a kind of scouring sand production technology, comprising the following steps:
Roughing sand Jing Guo pre-treatment is successively carried out to first time scouring, first time desliming, cleans for second, take off for second
Mud, sub-material and wet magnetic separation.
Further, the pre-treatment includes: that roughing sand is successively carried out to first time screening, sizes mixing and buffers；
Preferably, the pre-treatment includes: to be sieved using the first screening plant to roughing sand, recycle size mixing equipment into
Row is sized mixing, and is entered back into surge bunker and is buffered；
Preferably, the pre-treatment includes: that roughing sand first passes through delivery device discharging, then using the first screening plant into
Row screening, enters back into after size mixing equipment is sized mixing and is pumped into surge bunker by sand pump；
Preferably, the first screening plant includes linear vibrating screen；
Preferably, the mass concentration for the mortar sized mixing is 50-70%.
Further, it is introduced into the first friction scrubbing apparatus progress first time scouring by the roughing sand of pre-treatment, enters back into the
First time desliming is carried out in one desliming device, is then entered back into the second friction scrubbing apparatus and is carried out second of scouring, enters back into second
Second of desliming is carried out in desliming device, enters back into and carries out sub-material in distribution equipment, then magnetic separation is carried out by wet magnetic separation equipment；
Preferably, first desliming device and the second desliming device include spiral deslimer each independently；
Preferably, second friction scrubbing apparatus is the scouring unit being mainly made of multiple swaging machines, preferably mainly by
The scouring unit of 6-8 swaging machine composition；
Preferably, the first time cleans and second of the time cleaned is each independently 5-30min, preferably 6-
20min；
Preferably, the wet magnetic separation equipment includes wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator.
Further, further include post-processing: being post-processed by the roughing sand of wet magnetic separation, obtain cleaning sand；
Preferably, the post-processing includes: second of screening and dehydration；
Preferably, the post-processing includes: and enters to carry out in the second screening plant second by the roughing sand of wet magnetic separation
Screening, the scouring sand after second of screening are dehydrated by pipeline into dehydration equipment, obtain cleaning sand；
Preferably, second screening plant includes the linear vibrating screen extension set group with hydraulic sand washing device, the band
The scouring sand of plurality of specifications can be screened out by having the linear vibrating screen extension set combination of hydraulic sand washing device, be preferably able to screen out to
The scouring sand of few four kinds of specifications；
Preferably, the dehydration equipment includes straight-line oscillation dewatering screen.
It further, further include sewage recycling office reason: to the pre-treatment, for the first time scouring, first time desliming, second
Generated sewage carries out at recycling in any one or more steps in scouring, second of desliming, sub-material and wet magnetic separation
Reason；
Preferably, the pre-treatment, for the first time scouring, first time desliming, second are cleaned, second of desliming, sub-material
It is precipitated with generated sewage transport in any one or more steps in wet magnetic separation into sedimentation basin, is then passed through
Filter filtering, obtains the recycle-water that can be used in cleaning sand production；
Preferably, sludge caused by precipitating and/or filter passes through at concentration, flocculation sedimentation processing and plate compression
Reason, obtains sludge cake.
According to another aspect of the present invention, the present invention provides a kind of method for reclaiming of antiquated sand, including above-mentioned wiping
Washed-out sand production technology.
Further, the method for reclaiming includes:
Antiquated sand is pre-processed, pretreatment antiquated sand is obtained；Pretreatment antiquated sand is subjected to pre-treatment, then successively carries out first
Secondary scouring, first time desliming, second scouring, second of desliming, sub-material and wet magnetic separation.
Preferably, the method for reclaiming the following steps are included:
(a) pretreatment of antiquated sand: antiquated sand is pre-processed, and obtains pretreatment antiquated sand；
(b) pretreatment antiquated sand pre-treatment: is subjected to pre-treatment；
(c) scouring, desliming and magnetic separation: the antiquated sand by pre-treatment successively carries out first time scouring, first time desliming, second
Secondary scouring, second of desliming, sub-material and wet magnetic separation；
(d) it post-processes: being post-processed by the antiquated sand of wet magnetic separation, obtain cleaning sand；
(e) dry: obtained scouring sand being dried, reclaimed sand is obtained；
Preferably, step (e) includes: that the scouring sand that will be obtained successively is dried, second of magnetic separation and third time are sieved,
Obtain reclaimed sand；
Preferably, step (e) includes: and cleans sand to be introduced into drying equipment and be dried, and enters back into the second magnetic separation
It carries out carrying out third time screening in second of magnetic separation, then third screening plant in equipment, obtains reclaimed sand；
Preferably, dry temperature is 300-400 DEG C；
Preferably, the drying equipment includes three backhaul dryers；
Preferably, second magnetic plant includes intensity magnetic separator；
Preferably, the third screening plant includes straight-line oscillation screening machine.
According to another aspect of the present invention, the present invention provides a kind of scouring sand production system, and the production system includes:
Roughing sand preprocessing system；
Scouring, desliming and the magnetic separation system of roughing sand: including sequentially connected first friction scrubbing apparatus, the first desliming device,
Two friction scrubbing apparatus, the second desliming device, distribution equipment and wet magnetic separation equipment；The outlet of the roughing sand preprocessing system with it is described
The entrance of first friction scrubbing apparatus connects.
Further, the scouring, desliming of the roughing sand and magnetic separation system include sequentially connected first friction scrubbing apparatus, first
Desliming device, the second friction scrubbing apparatus, the second desliming device, desliming bucket, sand pump, distribution equipment and wet magnetic separation equipment；
Preferably, first desliming device and the second desliming device include spiral deslimer each independently；
Preferably, second friction scrubbing apparatus is the scouring unit being mainly made of multiple swaging machines, preferably mainly by
The scouring unit of 6-8 swaging machine composition；
Preferably, the wet magnetic separation equipment includes wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator；
Preferably, the roughing sand preprocessing system includes sequentially connected first time screening plant, size mixing equipment and buffering
The outlet in storehouse, the surge bunker is connect with the entrance of the first friction scrubbing apparatus；
Preferably, the roughing sand preprocessing system includes sequentially connected delivery device, first time screening plant, sizing mixing sets
The outlet of standby, sand pump and surge bunker, the surge bunker is connect with the entrance of the first friction scrubbing apparatus；
Preferably, the first screening plant includes linear vibrating screen；
Preferably, the delivery device includes the lower hopper with waterpower discharge duct；
It preferably, further include after-treatment system, the outlet of the entrance of the after-treatment system and the wet magnetic separation equipment
Connection；
Preferably, the after-treatment system includes the second screening plant and dehydration equipment, and second screening plant goes out
Mouth is connect by pipeline with the entrance of the dehydration equipment；
Preferably, the second screening plant includes the linear vibrating screen extension set group with hydraulic sand washing device, described to have water
The linear vibrating screen extension set combination of power sand flushing device can screen out the scouring sand of plurality of specifications, be preferably able to screen out at least four
The scouring sand of kind specification；
Preferably, dehydration equipment includes straight-line oscillation dewatering screen；
Preferably, the scouring sand production system further includes sewage recorery treatment system, the sewage recorery treatment system
With it is any one in the roughing sand preprocessing system, the scouring of the roughing sand, desliming and magnetic separation system or the after-treatment system
A or multiple system connections；
Preferably, the sewage recorery treatment system includes sedimentation basin and filter；
Preferably, the sewage recorery treatment system further includes sludge-tank, scraping and sucking machine, belt filter press.
According to another aspect of the present invention, the present invention provides a kind of system for regenerating and recycling of antiquated sand, including above-mentioned wiping
Washed-out sand production system.
Further, the system for regenerating and recycling further includes the pretreatment system and drying system of antiquated sand；
Preferably, the drying system includes sequentially connected drying equipment, the second magnetic plant and third screening plant；
Preferably, the drying system includes sequentially connected drying equipment, surge tank, the second magnetic plant, third sieve
Subset and finished product batch can；
Preferably, the drying equipment includes three backhaul dryers；
Preferably, second magnetic plant includes intensity magnetic separator；
Preferably, the third screening plant includes straight-line oscillation screening machine.
Compared with prior art, the beneficial effects of the present invention are:
1, scouring sand production technology provided by the invention, including the roughing sand for passing through pre-treatment is successively carried out first time wiping
Wash, first time desliming, second scouring, second of desliming, sub-material and the step of wet magnetic separation, can to the sludge in roughing sand into
Row adequately removing, has carried out sufficient magnetic separation to the magnetisable material in roughing sand, has greatly reduced the clay content for cleaning sand, mention
The high dioxide-containing silica for cleaning sand.
Wherein, the content of magnetisable material can be significantly reduced by wet magnetic separation, magnetic separation effect is more preferable, significantly improves scouring
The dioxide-containing silica of sand, and then guarantee the obtained quality and quality of scouring sand.Also, sub-material is set before wet magnetic separation
Step, it is ensured that the stability and uniformity of material during wet magnetic separation go on smoothly that provide can for wet magnetic separation
The guarantee leaned on.
Likewise, scouring sand production system of the invention also at least has advantage identical with sand production technology is cleaned.
2, the method for reclaiming of antiquated sand provided by the invention including above-mentioned scouring sand production technology, thus has
The clay content of the reclaimed sand arrived is low, and the content of magnetisable material is low, and the high feature of the content of silica ensure that the matter of reclaimed sand
Amount, the reclaimed sand for being conducive to obtain are applied to some special casting as in the production higher casting of dimension precision requirement.It mentions
The high utility value of reclaimed sand.
Likewise, the system for regenerating and recycling of antiquated sand of the invention is also at least with identical with the method for reclaiming of antiquated sand
Advantage.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram provided in an embodiment of the present invention for cleaning sand production technology；
Fig. 2 is the structural schematic diagram provided in an embodiment of the present invention for cleaning sand production system；
Fig. 3 is the flow diagram of the method for reclaiming of antiquated sand provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the system for regenerating and recycling of antiquated sand provided in an embodiment of the present invention.
Icon: the pretreatment system of 100- antiquated sand；200- roughing sand preprocessing system；Scouring, desliming and the magnetic of 300- roughing sand
Select system；400- after-treatment system；500- drying system；
1- antiquated sand dump skip；2- magnetic-separation belt conveyor；3- swing crushing sieve；4- elevator；5- roughing screening machine；6- finished product material
Storehouse；7- magnetic separator；8- machinery regenerating device；9- boiling dedusting bed；10- dump skip；11- linear vibrating screen；12- sizes mixing bucket；13- sand
Pump；14- surge bunker；The first swaging machine of 15-；16- the first spiral deslimer；17- cleans unit；18- the second spiral deslimer；
19- desliming bucket；20- sand pump；21- tripper；22- wet type powerful magnetic separator；The combination of 23- linear vibrating screen extension set；The vibration of 24- straight line
Dynamic dewatering screen；Tri- backhaul dryer of 25-；26- straight-line oscillation screening machine；27- bucket elevator；28- surge tank；29- intensity magnetic separator；
30- straight-line oscillation screening machine；31- bucket elevator；32- finished product batch can.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiments and examples, but this field skill
Art personnel will be understood that following embodiments and embodiment are merely to illustrate the present invention, and are not construed as limiting model of the invention
It encloses.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.The person that is not specified actual conditions, according to normal conditions or manufacturer builds
The condition of view carries out.
To overcome the not perfect of the prior art, the present invention provides a kind of regeneration for cleaning sand production technology and system, antiquated sand
Reuse method and system, with reduce obtain clean sand, the clay content in reclaimed sand, reduce the content of magnetisable material, improve two
The content of silica, it is ensured that the quality and quality of product.
In a first aspect, providing a kind of scouring sand production technology at least one embodiment, comprising the following steps:
Roughing sand Jing Guo pre-treatment is successively carried out to first time scouring, first time desliming, cleans for second, take off for second
Mud, sub-material and wet magnetic separation.
The technique can adequately remove the sludge in roughing sand, carry out adequately to the magnetisable material in roughing sand
Magnetic separation greatly reduces the clay content for cleaning sand, improves the dioxide-containing silica for cleaning sand.
Preferably, sand production technology is cleaned, comprising the following steps:
(a) roughing sand pre-treatment；
(b) scouring, desliming and magnetic separation of roughing sand: the roughing sand by pre-treatment successively carries out first time scouring, takes off for the first time
Mud, second scouring, second of desliming, sub-material and wet magnetic separation；
(c) it post-processes: being post-processed by the roughing sand of wet magnetic separation, obtain cleaning sand.
Above-mentioned scouring sand production technology is provided with roughing sand pre-treatment work before the scouring of roughing sand, desliming and magnetic separation process
Sequence can remove some impurity in roughing sand by pretreatment procedure, and then mitigate subsequent scouring, desliming and magnetic separation process
Load improves scrub effect and cleans efficiency, and then improves production efficiency.
Above-mentioned scouring sand production technology, scouring, desliming and magnetic separation process provided with roughing sand, including successively carry out first
Secondary scouring, first time desliming, second scouring, second of desliming, sub-material and wet magnetic separation, in this way, can be to the dirt in roughing sand
Mud is adequately removed, and has been carried out sufficient magnetic separation to the magnetisable material in roughing sand, has been improved scrub effect, can be greatly reduced
The clay content of sand and the content of magnetisable material are cleaned, the dioxide-containing silica for cleaning sand is improved.
It is especially prominent, be provided with wet magnetic separation the step of, the content of magnetisable material, magnetic separation effect can be significantly reduced
More preferably, the dioxide-containing silica for cleaning sand is significantly improved, and then guarantees the obtained quality and quality of scouring sand.Also, wet
Sub-material step is set before formula magnetic separation, it is ensured that the stability and uniformity of material during wet magnetic separation are wet type magnetic
Choosing goes on smoothly the reliable guarantee of offer.
Further, postprocessing working procedures are set after the scouring of roughing sand, desliming and magnetic separation process, can be obtained by post-processing
To goal standard or meet the scouring sand for producing and needing.
Through testing, the scouring sand that sand production technology obtains is cleaned using the present invention, clay content range is in 0.15-0.3% (matter
Measure content), magnetisable material content range is in 0.3-1.5% (mass content), and dioxide-containing silica range is in 88-96% (quality
Content).
It should be understood that
Unless otherwise indicated, profession used herein and meaning phase known to scientific term and one skilled in the art
Together.
In the present invention, if without particularly illustrating, all technical characteristics and preferred feature mentioned in this article can
New technical solution is formed to be combined with each other.
Herein, unless otherwise indicated, each operating procedure can be carried out sequentially, can also be carried out out of order.Example
It such as, may include other steps between each operating procedure, and can also be with reversed order between each step.Preferably, herein
In each step in sequence carry out.
Unless otherwise specified, term and definition described herein is suitable for term generally in the art.Specifically, the relevant technologies
Term is explained as follows:
Roughing sand: alternatively referred to as fresh sand generally refers to the foundry sand used for the first time.In the present invention, roughing sand can be for for the first time
The foundry sand used, or antiquated sand is after pretreatment, obtained sand.For example, in the method for reclaiming of antiquated sand,
Roughing sand is antiquated sand after pretreatment, obtained sand；That is, pretreatment antiquated sand is alternatively referred to as roughing sand in the present invention.Again
Such as, in cleaning sand production technology, roughing sand can be natural quartz sand (silica sand), or antiquated sand obtains after pretreatment
The sand arrived.
It is understood that the difference of the method for reclaiming of scouring sand production technology and antiquated sand of the invention mainly exists
In, used raw sand is different, and in the method for reclaiming of antiquated sand, used raw sand is antiquated sand, need to antiquated sand into
Row pretreatment, then carry out again pre-treatment, for the first time scourings, first time desliming, for the second time scouring, second of desliming, sub-material and
The processes such as wet magnetic separation.
Antiquated sand: alternatively referred to as old sand, casting in process of production caused by discarded object of power boiler discharge.Generally, antiquated sand
It grain surface can adhesion failure or the binder coating film not failed or other pollutants etc..
Reclaimed sand: antiquated sand passes through regeneration treatment, and the impurity such as remaining binder in removal or part part removal sand grains return
The multiple sand to close to fresh sand performance.
Clay content: the quality of particle of the partial size less than 0.02mm accounts for the percentage of sand sample gross mass in foundry sand.
Magnetic separation: it is different according to the magnetism of substance, the dressing method of different magnetisable materials is separated from the mixture；Including dry
Formula magnetic separation and wet magnetic separation, wherein wet magnetic separation can be used for sorting ferromagnetic substance.
Second aspect, provides a kind of scouring sand production system at least one embodiment, and the production system includes:
Roughing sand preprocessing system；
Scouring, desliming and the magnetic separation system of roughing sand: including sequentially connected first friction scrubbing apparatus, the first desliming device,
Two friction scrubbing apparatus, the second desliming device, distribution equipment and wet magnetic separation equipment；The outlet of the roughing sand preprocessing system with it is described
The entrance of first friction scrubbing apparatus connects；
After-treatment system: the entrance of the after-treatment system is connect with the outlet of the wet magnetic separation equipment.
It is understood that above-mentioned scouring sand production system is corresponding with scouring sand production technology above-mentioned, i.e. the scouring
Sand production system is applied to the system (equipment) for cleaning sand production technology.The scouring sand production system and scouring sand above-mentioned are raw
Production. art be based on the same inventive concept, thus at least have advantage identical with above-mentioned scouring sand production technology, the present invention
Details are not described herein.
Specifically, according to an embodiment of the invention, the production process for cleaning sand can be divided into three regions, including pre-treatment
Area, scouring, desliming and magnetic separation area and post processing zone.Above-mentioned scouring sand production technology and production system are carried out below detailed
Description.
(a) roughing sand pre-treatment
In this step, roughing sand is successively carried out to first time screening, sizes mixing and buffers.
According to an embodiment of the invention, step (a) includes: that roughing sand first passes through delivery device discharging, then using first
Screening plant is sieved, and is entered back into after size mixing equipment is sized mixing and is pumped into surge bunker by sand pump.
In the pretreatment procedure of above-mentioned roughing sand, used equipment includes delivery device, the first screening plant, sizing mixing sets
Standby, sand pump and surge bunker.Wherein, the outlet of delivery device is connect with the entrance of the first screening setting, and the first screening plant goes out
Mouth is connect with the entrance of size mixing equipment, and the outlet of size mixing equipment and the entrance of sand pump connect, the outlet of sand pump and entering for surge bunker
Mouth connection.
Preferably, the delivery device includes the lower hopper (dump skip) with waterpower discharge duct；
Preferably, the first screening plant includes linear vibrating screen；
Preferably, the size mixing equipment includes bucket of sizing mixing；
Preferably, the mass concentration for the mortar sized mixing is 50-70%, typical but non-limiting, such as can be
50%, 52%, 55%, 58%, 60%, 62%, 65%, 68% or 70%.After pulp consistency within this range is more advantageous to
Continuous operation more meets production needs.
Equipment employed in above-mentioned steps (a) pre-treatment such as delivery device, the first screening plant, size mixing equipment etc. can adopt
With the commonly used equipment of this field.Preferably, the equipment used in roughing sand pretreatment procedure includes the blanking with waterpower discharge duct
Bucket, linear vibrating screen, bucket of sizing mixing, sand pump and mortar surge bunker.Wherein, the bottom of lower hopper is roughing sand outlet, lower hopper side
Wall is distributed with waterpower discharge duct, and linear vibrating screen is equipped with below roughing sand outlet, and compass screen surface is by impurity and big on linear vibrating screen
Grain substance is discharged, and compass screen surface sieves away the thin particulate matter in sand under linear vibrating screen, and intermediate compass screen surface is required material, intermediate
Compass screen surface is connected with bucket of sizing mixing, and bucket of sizing mixing is connected with sand pump, and after bucket of sizing mixing is sized mixing, mortar is delivered to surge bunker by sand pump
Storage.
As a result, according to an embodiment of the invention, roughing sand passes through dump skip discharging in preceding processing area, then using straight line
Vibrating screen removes the impurity in roughing sand, enters back into after bucket of sizing mixing is sized mixing and is pumped into surge bunker by sand pump.In this way, roughing sand can be removed
In some impurity, the large granular impurity etc. in roughing sand is separated, carries out preliminary screening to roughing sand, and by the dense of mortar
Degree is adjusted in suitable range, so as to mitigate it is subsequent clean, the load of desliming and magnetic separation process, improve scrub effect and
Efficiency is cleaned, and then improves production efficiency.
(b) scouring, desliming and magnetic separation of roughing sand
In this step, successively carried out by the roughing sand of pre-treatment first time scouring, first time desliming, second clean,
Second of desliming, sub-material and wet magnetic separation.
According to an embodiment of the invention, step (b) include: roughing sand by pre-treatment be introduced into the first friction scrubbing apparatus into
Row is cleaned for the first time, is entered back into progress first time desliming in the first desliming device, is then entered back into the second friction scrubbing apparatus and carry out
Second of scouring, enters back into and carries out second of desliming in the second desliming device, subsequently into sedimentation desliming is carried out in desliming bucket, passes through
The roughing sand that sedimentation desliming obtains is pumped into distribution equipment by sand pump, then carries out magnetic separation by wet magnetic separation equipment.
In the scouring of above-mentioned roughing sand, desliming and magnetic separation process, used equipment includes the first friction scrubbing apparatus, the first desliming
Equipment, the second friction scrubbing apparatus, the second desliming device, desliming bucket, sand pump, distribution equipment and wet magnetic separation equipment.Wherein, it first wipes
The outlet for washing the entrance and surge bunker of equipment connects, and the outlet of the first friction scrubbing apparatus is connect with the entrance of the first desliming device, the
The outlet of one desliming device is connect with the entrance of the second friction scrubbing apparatus, the outlet of the second friction scrubbing apparatus and entering for the second desliming device
Mouth connection, the outlet of the second desliming device are connect with the entrance of desliming bucket, and the outlet of desliming bucket and the entrance of sand pump connect, sand pump
Outlet and distribution equipment entrance connect, the outlet of distribution equipment is connect with the entrance of wet magnetic separation equipment.
Preferably, first friction scrubbing apparatus is swaging machine commonly used in the art.It cleans and is cleaned to be thick for the first time, be can be used
Swaging machine commonly used in the art is cleaned.
Preferably, second friction scrubbing apparatus includes the scouring unit being made of multiple swaging machines, is preferably wiped by 6-8
The scouring unit of washing machine composition, further preferably the scouring unit to be made of 7 swaging machines.It is that essence is cleaned that second, which is cleaned,
It is preferred that cleaned using combination swaging machine, it can treat and clean material and play strength scrubbing action, the impurity removal on surface,
It improves and cleans qualification rate.
Preferably, first desliming device is the first spiral deslimer；Second desliming device is de- for the first spiral
Mud machine.First time desliming is thick desliming, and second of desliming is smart desliming, and equipment used by this desliming twice can be de- for spiral
Desliming effect and desliming efficiency can be improved in mud machine.
Preferably, the first time cleans and second of the time cleaned is each independently 5-30min, preferably 6-
20min；For example, the time cleaned for the first time is 5-30min, second of the time cleaned is 5-30min, typical but non-limiting
For example can be 5min, 6min, 8min, 10min, 12min, 15min, 20min, 22min, 25min or 30min.Suitable
Cleaning the time helps to ensure scrub effect, improves and cleans efficiency.
Preferably, the revolving speed of first friction scrubbing apparatus and the second friction scrubbing apparatus is each independently 250-350r/min；
For example, the revolving speed of the first friction scrubbing apparatus is 250-350r/min, the revolving speed of the second friction scrubbing apparatus is 250-350r/min, it is typical but
It is unrestricted for example can for 250r/min, 260r/min, 270r/min, 280r/min, 290r/min, 300r/min,
310r/min, 320r/min, 330r/min, 340r/min or 350r/min.Suitable swaging machine revolving speed helps to ensure to clean
Effect improves and cleans efficiency.
By slightly cleaning, thick desliming, essence is cleaned and the cooperation of smart desliming, facilitates the impurity for reducing roughing sand surface, will be miscellaneous
Matter cleans, and sufficiently removes to the sludge in roughing sand, it is ensured that the quality and quality of obtained scouring sand improve production effect
Rate.
Preferably, the distribution equipment can be tripper commonly used in the art.
Preferably, the wet magnetic separation equipment includes wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator.
Wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator are suitable for sorting ferromagnetic substance, and efficiency of magnetic separation is high, magnetic
It selects effect good, the content of magnetisable material can be significantly reduced, significantly improve the dioxide-containing silica for cleaning sand, and then guarantee to obtain
Scouring sand quality and quality.Also, sub-material is carried out using tripper before entering wet magnetic separation equipment, it is ensured that wet
The stability and uniformity of material during formula magnetic separation provide reliable guarantee for going on smoothly for wet magnetic separation.
Equipment such as swaging machine, tripper employed in scouring, desliming and the magnetic separation of above-mentioned steps (b) roughing sand etc. can be used
The commonly used equipment of this field.Preferably, the equipment that the scouring of the roughing sand, desliming and magnetic separation process use includes the first scouring
Machine, cleans unit, the second spiral deslimer, desliming bucket, sand pump, tripper and wet type powerful magnetic separator at the first spiral deslimer.
Wherein, first swaging machine is connected with the first spiral deslimer, plays slightly scouring, thick desliming to roughing sand；Described
It cleans unit to be connected with the second spiral deslimer, plays essence scouring and smart desliming, the scouring unit is by several
A swaging machine in a manner of being connected in series is composed, and the swaging machine is made of six rib cylinders and stirring blade, and entrance, which is located at, to be wiped
The outer side-lower of six rib cylinder of washing machine, outlet are located at entrance to upper side, and stirring blade is divided into three layers of upper, middle and lower, and three layers of blade are located at same
On one agitating shaft, upper layer blade and lower leave have certain angle, and upper layer blade and lower leave angle are on the contrary, upper layer blade
There is downward active force to mortar, lower leave has upward active force to mortar, and intermediate blade plays horizontal stirring；It wipes
The material outlet of washing machine group is connected with the second spiral deslimer entrance, the second material outlet of spiral deslimer and entering for desliming bucket
Mouth is connected, and the outlet of desliming bucket is connected with sand pump entrance, and sand pump material outlet is connected with tripper material inlet by pipeline, point
Glassware outlet is connected with wet type powerful magnetic separator entrance, and the complete material of magnetic separation enters subsequent postprocessing working procedures.
As a result, according to an embodiment of the invention, the roughing sand by pre-treatment passes through buffering in scouring, desliming and magnetic separation
Storehouse initially enters First swaging machine and is slightly cleaned, and first time desliming is carried out subsequently into the first spiral deslimer, with laggard
Enter to combine swaging machine (cleaning unit) and carry out 7 essence scourings, enters back into the second spiral deslimer by the roughing sand that essence is cleaned and carry out
Second of desliming carries out sedimentation desliming subsequently into desliming bucket, then roughing sand is pumped into tripper by sand pump, finally passes through wet type
Cleaning magnetic separator selects most of magnetisable material.And then realize and the sludge in roughing sand is adequately removed, in roughing sand
Magnetisable material carried out sufficient magnetic separation, greatly reduce clean sand clay content and magnetisable material content, improve wiping
The dioxide-containing silica of washed-out sand ensure that the quality and quality for cleaning sand.
(c) it post-processes
In this step, it is post-processed to by the roughing sand of wet magnetic separation, obtains cleaning sand.
According to an embodiment of the invention, step (c) includes: second of screening and dehydration；Further, step (c) is wrapped
It includes: entering in the second screening plant by the roughing sand of wet magnetic separation and carry out second of screening and further desliming, sieve for the second time
Scouring sand afterwards is dehydrated by pipeline into dehydration equipment, obtains cleaning sand.
In the postprocessing working procedures of above-mentioned roughing sand, used equipment includes the second screening plant and dehydration equipment.Described
The entrance of two screening plants is connect with the outlet of wet magnetic separation equipment, and the outlet of the second screening plant passes through pipeline and the dehydration
The entrance of equipment connects.
Preferably, second screening plant includes the linear vibrating screen extension set group with hydraulic sand washing device, the band
The scouring sand of plurality of specifications can be screened out by having the linear vibrating screen extension set combination of hydraulic sand washing device, be preferably able to screen out to
The scouring sand of few four kinds of specifications.
In the present invention, the second screening plant uses screening unit, in this way, primary production can screen out at least four rule
The scouring sand of lattice, and the scouring sand of different size can arbitrarily adjust its size distribution, greatly improve production efficiency.
Preferably, the dehydration equipment includes straight-line oscillation dewatering screen.
Preferably, the grain graininess range of the scouring sand obtained is 20-200 mesh.The grain graininess for cleaning sand can be with root
It is adjusted according to needs of production.
Such as dehydration equipment of equipment employed in the post-processing of above-mentioned steps (c) roughing sand etc. can be used the common of this field and set
It is standby.Preferably, the equipment that the post-processing of roughing sand uses includes linear vibrating screen extension set combination with hydraulic sand washing device and straight
Linearly coupled dewatering screen；The hydraulic sand washing device is set to above linear vibrating screen, is equipped with several holes by several tube walls
Water pipe composition, the sand on compass screen surface is rinsed；The vibrating screening machine points four to five layers, every layer screen out it is varigrained
Sand is cleaned, by pipeline to dewatering screen, lowest level is device for recycling sewage, and the sewage collecting with mud point is delivered to dirt
Water reuse process；The dewatering screen is that one layer of upper compass screen surface is to clean sand, and it is device for recycling sewage that sieve is lower, and the sewage of removing passes through dirt
Water recovery device is delivered to waste water treating and reutilizing process；The screening unit is two sieve relays screening, First sieve the
One layer directly be delivered to sand storage, the First sieve second layer is corresponding with second sieve first layer, First sieve third
Layer is corresponding with second sieve second layer, as needed and so on.
In the present invention, the sand cleaned is delivered to storehouse using water by pipeline, is dehydrated sand using dewatering screen, then
Water is recycled to sewage disposal system, in this way, it is possible to reduce Belt Conveying reduces input cost.
As a result, according to an embodiment of the invention, roughing sand enters linear vibrating screen extension set after above-mentioned scrubbing-desliming magnetic separation
Group carries out sizing and further desliming, and the scouring sand after screening is carried out dehydrating by pipeline to dewatering screen, passes through
It obtains cleaning sand and entering sand storage storing after crossing dehydration.In this way, with goal standard or the scouring sand for producing and needing can be met,
And once production can screen out the scouring sand of at least four specifications, and the scouring sand of different size can arbitrarily adjust its granularity
Distribution, greatly improves production efficiency.
According to an embodiment of the invention, above-mentioned scouring sand production technology further include: to the step (a), step (b) and step
Suddenly generated sewage is recycled in any one or more steps in (c)；That is, can be by step (a)
The sewage of middle generation is recycled, and the sewage generated in step (b) can be recycled, can be by step (c)
The sewage of middle generation is recycled, and the sewage generated in step (a) and step (b) can also be recycled,
The sewage generated in step (b) and step (c) can be recycled, it can also be by step (a), step (b) and step
(c) sewage generated in is recycled.Preferably, being carried out the whole sewage generated in sand production technology are cleaned at recycling
Reason, that is, the sewage generated in above-mentioned steps (a), step (b) and step (c) is recycled.
Preferably, first sewage transport generated in production process is precipitated into sedimentation basin, then passes through filtering
Device filtering, obtains the recycle-water that can be used in cleaning sand production.
Preferably, sludge caused by precipitating and/or filter passes through at concentration, flocculation sedimentation processing and plate compression
Reason, obtains sludge cake.That is, the sludge that precipitating can be generated carries out concentration, flocculation sedimentation processing and sheet frame pressure
Filter processing, the sludge that filtering can be generated carry out concentration, flocculation sedimentation processing and plate compression and handle, can also will sink
It forms sediment and the sludge of filtering generation carries out concentration, flocculation sedimentation processing and plate compression processing.
In the present invention, the sewage that each process generates handle simultaneously reuse, greatly improves water utilization rate, is protected
The effective use of sewage, sludge is demonstrate,proved, environmental protection and energy saving are pollution-free.
Equipment used by above-mentioned sewage recycling office is managed includes sedimentation basin, sludge-tank, filter, scraping and sucking machine and belt pressure
Filter.
Equipment such as sedimentation basin, filter employed in above-mentioned sewage recycling office reason etc. can be used the common of this field and set
It is standby.Preferably, the sedimentation basin is made of several sedimentation basins, coprecipitation mode includes natural subsidence and flocculating setting, and sewage returns
Sedimentation basin natural subsidence is first passed through after receipts, then is collected the sludge after natural subsidence by walking scraping and sucking machine, then
Settle sludge further by adding flocculant again, then the sludge after sedimentation is carried out filters pressing by belt filter press to make sludge
It is sufficiently separated, obtains compared with the lower sludge of water content and the lower water of clay content, which filters using filter, finally with water
Purer water is obtained, for entirely cleaning sand production；The scraping and sucking machine is equipped with track, and track is located on sedimentation basin enclosure wall,
Scraping and sucking machine is across above sedimentation basin timing walking in orbit, and scraping and sucking machine is equipped with several pump suction pipes, and pump suction pipe hangs down
Bottom of pond portion is deeply directly precipitated, as scraping and sucking machine is walked, the sludge for precipitating bottom of pond portion is drawn into sludge-tank and concentrated by pump suction pipe to sink
It forms sediment；The flocculant is proportionally added into sludge-tank by chemicals dosing plant, and the sludge after flocculation sedimentation is pumped to by sludge pump
Belt filter press carries out filters pressing processing, is finally sufficiently separated sludge and water point.
The sewage generated in sand production process will be cleaned to be handled and be recycled, make to clean industrial water circulation
It utilizes, improves water utilization rate, not only alleviate water resource waste problem, also reduce being born with water for enterprise, environmental protection
Saving power and preventing pollution dye.
As a result, according to an embodiment of the invention, generated sewage is all recycled in sedimentation basin in entire production process,
It can be used for cleaning the recycle-water of sand production by the precipitating of sedimentation basin, being obtained by filtration for filter, it is dirty caused by precipitating, filtering
Mud finally obtains the lower sludge cake of water content by sludge condensation processing, flocculation sedimentation processing, plate compression processing, as
Building brick raw material.
Above-mentioned scouring sand production technology, simple process is easy to operate, and controllability is good, at low cost, the product obtained for cleaning sand
It is of fine quality different, the sewage cleaned in sand production process is handled and recycled, water waste is reduced, solves water resource
Serious problem is wasted, enterprise water use burden is reduced, is conducive to realize industrialized production.
The third aspect provides a kind of method for reclaiming of antiquated sand at least one embodiment, including above-mentioned scouring
Sand production technology.
Fourth aspect provides a kind of system for regenerating and recycling of antiquated sand at least one embodiment, including above-mentioned scouring
Sand production system.
It is understood that the system for regenerating and recycling of above-mentioned antiquated sand is corresponding with the method for reclaiming of antiquated sand above-mentioned,
I.e. the system for regenerating and recycling of the antiquated sand be applied to antiquated sand method for reclaiming system (equipment).
The method for reclaiming and system of the antiquated sand and scouring sand production technology above-mentioned and system are based on same invention
Design, thus at least there is advantage identical with above-mentioned scouring sand production technology and system, details are not described herein by the present invention.
In the present invention, it further includes to the pre- of antiquated sand that the method for reclaiming of antiquated sand, which includes scouring sand production technology above-mentioned,
Treatment process and drying process.That is, first pre-process antiquated sand, to obtain pretreatment antiquated sand, then will obtain
Pretreatment antiquated sand successively carries out pre-treatment, scouring, desliming and magnetic separation and post-processing, obtains cleaning sand, will finally clean sand again
It is dried, obtains reclaimed sand.
Specifically, according to an embodiment of the invention, the regeneration process of antiquated sand can be divided into five regions, including antiquated sand
Pretreating zone, pre-treatment area is cleaned, desliming and magnetic separation area, post processing zone and dry section.Below again to above-mentioned antiquated sand
Raw reuse method and system are described in detail.
The pretreatment of S1 antiquated sand
In this step, antiquated sand is pre-processed, obtains pretreatment antiquated sand.
It should be noted that the present invention does not make spy for the pretreated concrete operations mode of antiquated sand and used equipment
Different limitation, can refer to the prior art and is pre-processed, the present invention is not described in detail herein.
It is typical but non-limiting, such as can be come out for antiquated sand from antiquated sand dump skip, vibration is entered by magnetic-separation belt conveyor
Dynamic broken sieve, enters back into elevator, then carry out screening roughing, enters back into finished product bin, then sequentially enters magnetic separator, mechanical regeneration
Machine and boiling dedusting bed, in this way, being pre-processed to antiquated sand.
By pre-processing to antiquated sand, the impurity such as most of micro mist, the mud point on antiquated sand surface can be removed, by sand
Block is crushed, and iron block, iron filings, stone, rubbish, large granular impurity etc. in antiquated sand can also be isolated, to be pre-processed
Antiquated sand.
S2 pre-treatment
S3 scouring, desliming and magnetic separation
S4 post-processing
It is understood that the pre-treatment of abovementioned steps (a) roughing sand, the scouring of step (b) roughing sand, desliming and magnetic separation and step
(c) post-processing is suitable for S2 pre-treatment, S3 scouring, desliming and magnetic separation and S4 post-processing, that is to say, that for S2 pre-treatment, S3
The explanation of scouring, desliming and magnetic separation and S4 post-processing is referred to the aforementioned explanation to step (a), (b) and (c),
Details are not described herein.
S5 is dry
In this step, obtained scouring sand is dried, obtains reclaimed sand.
According to an embodiment of the invention, S5 drying include: the scouring sand that will be obtained successively be dried, second of magnetic separation and
Third time is sieved, and reclaimed sand is obtained.
Preferably, S5 drying includes: and cleans sand to be introduced into drying equipment and be dried, and then enters back into surge tank
Middle storage enters back into and carries out carrying out third time screening in second of magnetic separation, then third screening plant in the second magnetic plant, obtains
Reclaimed sand.
In above-mentioned drying process, used equipment includes drying equipment, surge tank (storage tank), magnetic plant, third
Screening plant and finished product batch can (baked sand storage tank)；Wherein, the entrance of the outlet of drying equipment and surge tank connects, surge tank
Outlet and the entrance of magnetic plant connect, the outlet of magnetic plant connect with the entrance of third screening plant, and third is sieved and set
Standby outlet is connect with finished product storage tank.
Preferably, the drying equipment includes three backhaul dryers.
Preferably, dry temperature is 300-400 DEG C；Typical but non-limiting, dry temperature for example can be 300
DEG C, 310 DEG C, 320 DEG C, 330 DEG C, 340 DEG C, 350 DEG C, 360 DEG C, 370 DEG C, 380 DEG C, 390 DEG C or 400 DEG C.
It in the present invention, is dried using three backhaul dryers, has compact-sized, occupied area is small, safe and reliable,
Low energy consumption, the good feature of drying materials effect, automation control easy to accomplish, helps to realize and reduces energy consumption and reduce cost
Effect.
Preferably, second magnetic plant includes intensity magnetic separator；Second of magnetic separation is dry type magnetic separation, used equipment
It can be dry type strong magnetic separator commonly used in the prior art.It can be further decreased in reclaimed sand by the setting of the second magnetic plant
The content of magnetisable material, improves regeneration effect, and the performance indicator of obtained reclaimed sand is excellent.
Preferably, the third screening plant includes straight-line oscillation screening machine.
The common of this field can be used in equipment employed in above-mentioned drying process such as magnetic plant, third screening plant etc.
Equipment.Preferably, equipment used by drying process includes three backhaul dryers, bucket elevator, straight-line oscillation screening machine, high intensity magnetic separation
Machine, cyclone dust collectors, desulfurizing tower, screw(-type) feeder, air-introduced machine, surge tank and finished product batch can；Wherein, clean sand hopper outlet with
Screw(-type) feeder entrance is connected, and screw(-type) feeder outlet is corresponding with bucket elevator import, and bucket elevator material outlet and three backhauls are dried
Dry furnace import is corresponding；Three backhauls drying outlet of still is corresponding with bucket elevator entrance, and bucket elevator entrance is connect with surge tank entrance,
It is equipped with intensity magnetic separator below surge tank, the magnetisable material in sand is further selected, intensity magnetic separator outlet is sieved into straight-line oscillation
Mouth is corresponding, and the outlet of straight-line oscillation screening machine is corresponding with bucket elevator entrance, and bucket elevator outlet is connected with finished product batch can entrance,
Drying oven offgas outlet is connected with cyclone dust collectors, and cyclone dust collectors are connected with air-introduced machine.
As a result, according to an embodiment of the invention, scouring sand after screening enters drying oven progress drying and processing, removal
Moisture in sand, the sand after drying and processing enters surge tank storage, using intensity magnetic separator by magnetic material remaining in sand
The further magnetic separation of matter carries out screening process subsequently into straight-line oscillation screening machine, impurity and coarse particulate matter in shakeout and micro-
Powder finally enters the storage of baked sand storage tank.
It can be used for producing precoated sand, resin sand etc. through the reclaimed sand that the method for the present invention obtains.The reclaimed sand that the present invention obtains
Clay content it is low, magnetisable material content is low, and the content of silica is high, and the quality of reclaimed sand can be guaranteed, have excellent performance,
Therefore, reclaimed sand of the invention can be used in the higher intricate casting of the accuracy of manufacture, such as in the related casting of engine.
It should be understood that the explanation of above-mentioned scouring sand production technology and system, the method for reclaiming of antiquated sand and system
In the content that is not described in detail, be those skilled in the art be readily apparent that Common Parameters, ordinary operation mode or common set
It is standby, such as operating parameter of screening etc., it is referred to the prior art, or adjusted according to the actual situation by those skilled in the art
Control, therefore can be omitted detailed description thereof.
To facilitate the understanding of the present invention, combined with specific embodiments below, comparative example and attached drawing, the present invention is made furtherly
It is bright.
Embodiment 1
1, shown in referring to Fig.1, a kind of scouring sand production technology includes the following steps:
(a) roughing sand pre-treatment
Roughing sand, by dump skip discharging, then removes the impurity in roughing sand using linear vibrating screen in preceding processing area,
It enters back into after bucket of sizing mixing is sized mixing and surge bunker is pumped by sand pump.Wherein, the mass concentration for the mortar sized mixing is 50-70%.
(b) scouring, desliming and magnetic separation of roughing sand
Roughing sand by pre-treatment in scouring, desliming and magnetic separation, by surge bunker initially enter First swaging machine into
Row is thick to be cleaned, and carries out first time desliming subsequently into the first spiral deslimer, subsequently enter combination swaging machine (cleaning unit) into
7 essences of row are cleaned, and are entered back into the second spiral deslimer by the roughing sand that essence is cleaned and are carried out second of desliming, subsequently into desliming bucket
Sedimentation desliming is carried out, then roughing sand is pumped by tripper by sand pump, finally selects most of magnetism by wet type cleaning magnetic separator
Substance.Wherein, the time slightly cleaned is 6-20min, and the time that essence is cleaned is 6-20min；It is thick to clean and the scouring in essence scouring
Revolving speed in machine is 250-350r/min.
(c) it post-processes
Roughing sand enters linear vibrating screen extension set group after above-mentioned scrubbing-desliming magnetic separation to carry out sizing and further takes off
Mud, the scouring sand after screening are carried out dehydrating by pipeline to dewatering screen, obtain cleaning sand simultaneously after dehydration
It is stored into sand storage.The grain graininess range of obtained scouring sand is 20-200 mesh.
Sewage caused by above-mentioned steps (a), step (b) and step (c), i.e., generated sewage in entire production process
All be recycled in sedimentation basin, by the precipitating of sedimentation basin, filter be obtained by filtration can be used for cleaning sand production recycle-water,
Precipitating filters generated sludge by sludge condensation processing, flocculation sedimentation processing, plate compression processing, finally obtains aqueous
Lower sludge cake is measured, as building brick raw material.
2, referring to shown in Fig. 2, a kind of scouring sand production system, comprising: roughing sand preprocessing system 200, the scouring of roughing sand take off
Mud and magnetic separation system 300, after-treatment system 400 and sewage recorery treatment system (not shown).
The equipment that roughing sand pretreatment procedure uses includes dump skip 10, linear vibrating screen 11, tune with waterpower discharge duct
Grout hopper 12, sand pump 13 and mortar surge bunker 14.Wherein, the bottom of dump skip is roughing sand outlet, and water is distributed in dump skip side wall
Power discharge duct is equipped with linear vibrating screen 11 below roughing sand outlet, and compass screen surface is by impurity and large particulate matter on linear vibrating screen 11
Discharge, the lower compass screen surface of linear vibrating screen 11 sieve away the thin particulate matter in sand, and intermediate compass screen surface is required material, intermediate compass screen surface
Bucket 12 is connected with sizing mixing, and bucket 12 of sizing mixing is connected with sand pump 13, and after bucket 12 of sizing mixing is sized mixing, mortar is delivered to by sand pump 13
Surge bunker 14 stores.
The equipment that the scouring of roughing sand, desliming and magnetic separation process use include the first swaging machine 15, the first spiral deslimer 16,
Clean unit 17, the second spiral deslimer 18, desliming bucket 19, sand pump 20, tripper 21 and wet type powerful magnetic separator 22.Wherein,
First swaging machine 15 is connected with the first spiral deslimer 16, plays slightly scouring, thick desliming to roughing sand；The wiping
Washing machine group 17 is connected with the second spiral deslimer 18, plays essence and cleans and smart desliming, the scouring unit 17 be by
Several swaging machines in a manner of being connected in series are composed, and the swaging machine is made of six rib cylinders and stirring blade, entrance position
In side-lower outside six rib cylinder of swaging machine, outlet is located at entrance to upper side, and stirring blade is divided into three layers of upper, middle and lower, three layers of blade position
In on same agitating shaft, upper layer blade and lower leave have certain angle, and upper layer blade and lower leave angle are on the contrary, upper layer
Blade has downward active force to mortar, and lower leave has upward active force to mortar, and intermediate blade plays the work of horizontal stirring
With；The material outlet for cleaning unit 17 is connected with 18 entrance of the second spiral deslimer, the material outlet of the second spiral deslimer 18
It is connected with the entrance of desliming bucket 19, the outlet of desliming bucket 19 is connected with 20 entrance of sand pump, 20 material outlet of sand pump and tripper 21
Material inlet is connected by pipeline, and the outlet of tripper 21 is connected with 22 entrance of wet type powerful magnetic separator, and the complete material of magnetic separation enters
Subsequent postprocessing working procedures.
The equipment that the post-processing of roughing sand uses includes linear vibrating screen extension set combination 23 with hydraulic sand washing device and straight
Linearly coupled dewatering screen 24；The hydraulic sand washing device is set to above linear vibrating screen, is equipped with several holes by several tube walls
The water pipe in hole forms, and is rinsed to the sand on compass screen surface；Four to five layers of the vibrating screening machine point, every layer screens out different grain size
Scouring sand, by pipeline to dewatering screen, lowest level is device for recycling sewage, will be delivered to the sewage collecting of mud point
Reusing sewage process；The dewatering screen is that one layer of upper compass screen surface is to clean sand, and it is device for recycling sewage that sieve is lower, and the sewage of removing passes through
Device for recycling sewage is delivered to waste water treating and reutilizing process；The screening unit is two sieve relay screenings, First sieve
First layer directly be delivered to sand storage, the First sieve second layer is corresponding with second sieve first layer, First sieve
Three layers are corresponding with second sieve second layer, as needed and so on.
Equipment used by sewage recycling office is managed includes sedimentation basin, sludge-tank, filter, scraping and sucking machine and belt filters pressing
Machine.The sedimentation basin is made of several sedimentation basins, and coprecipitation mode includes natural subsidence and flocculating setting, is first passed through after sewage recycling
Sedimentation basin natural subsidence is crossed, then is collected the sludge after natural subsidence by walking scraping and sucking machine, then again by adding
Flocculant is added to settle sludge further, then the sludge after sedimentation, which is carried out filters pressing by belt filter press, keeps sludge abundant with water
Separation, obtains compared with the lower sludge of water content and the lower water of clay content, which filters using filter, finally obtains purer
Net water, for entirely cleaning sand production；The scraping and sucking machine is equipped with track, and track is located on sedimentation basin enclosure wall, scraping and sucking machine
Timing walking in orbit is across above sedimentation basin, and scraping and sucking machine is equipped with several pump suction pipes, and pump suction pipe vertically deeply sinks
Shallow lake bottom of pond portion, as scraping and sucking machine is walked, the sludge for precipitating bottom of pond portion is drawn into sludge-tank and concentrates precipitating by pump suction pipe；The wadding
Solidifying agent is proportionally added into sludge-tank by chemicals dosing plant, and the sludge after flocculation sedimentation is pumped to belt filter press by sludge pump
Filters pressing processing is carried out, is finally sufficiently separated sludge and water point.
Embodiment 2
1, referring to shown in Fig. 3, a kind of method for reclaiming of antiquated sand includes the following steps:
The pretreatment of S1 antiquated sand, pre-processes antiquated sand, obtains pretreatment antiquated sand.
S2 pre-treatment, it is identical as (a) the step of embodiment 1.
S3 scouring, desliming and magnetic separation, it is identical as (b) the step of embodiment 1.
S4 post-processing, it is identical as (c) the step of embodiment 1.
S5 is dry
Scouring sand after screening enters drying oven and carries out drying and processing, the moisture in desanding is removed, by drying and processing
Sand afterwards enters surge tank storage, using intensity magnetic separator by the further magnetic separation of magnetisable material remaining in sand, subsequently into straight
Linearly coupled screening machine carries out screening process, and impurity and coarse particulate matter and micro mist in shakeout finally enter baked sand storage tank
Storage.Wherein, dry temperature is 300-400 DEG C.
2, referring to shown in Fig. 4, a kind of system for regenerating and recycling of antiquated sand, the pretreatment system 100 including antiquated sand, before roughing sand
Reason system 200, scouring, desliming and the magnetic separation system 300 of roughing sand, after-treatment system 400, sewage recorery treatment system is (in figure not
Show) and drying system 500.
Wherein, roughing sand preprocessing system 200, scouring, desliming and the magnetic separation system 300 of roughing sand, after-treatment system 400, with
And sewage recorery treatment system, it is same as Example 1.
The pretreatment system 100 of antiquated sand include sequentially connected antiquated sand dump skip 1, magnetic-separation belt conveyor 2, swing crushing sieve 3,
Elevator 4, roughing screening machine 5, finished product bin 6, magnetic separator 7, mechanical regenerating device 8 and boiling dedusting bed 9.
Drying system 500 includes sequentially connected three backhauls dryer 25, straight-line oscillation screening machine 26, bucket elevator 27, delays
Rush tank 28, intensity magnetic separator 29, straight-line oscillation screening machine 30, bucket elevator 31 and finished product batch can 32.
Further, equipment used by drying process also may include three backhaul dryers 25,27 (bucket lifting of bucket elevator
Machine), bucket elevator 31, straight-line oscillation screening machine 26, straight-line oscillation screening machine 30, intensity magnetic separator 29, cyclone dust collectors, desulfurizing tower,
Screw(-type) feeder, air-introduced machine, surge tank 28 and finished product batch can 32.Wherein, sand hopper outlet and screw(-type) feeder entrance phase are cleaned
Even, screw(-type) feeder outlet is corresponding with bucket elevator import, and bucket elevator material outlet is corresponding with three backhaul drying oven imports；Three
Backhaul drying outlet of still is corresponding with bucket elevator entrance, and bucket elevator entrance is connect with surge tank entrance, is equipped with below surge tank strong
Magnetic separator further selects the magnetisable material in sand, and intensity magnetic separator exports, straight-line oscillation corresponding with linear vibrating screen entrance
Screening machine outlet it is corresponding with bucket elevator entrance, bucket elevator outlet is connected with finished product batch can entrance, drying oven offgas outlet and
Cyclone dust collectors are connected, and cyclone dust collectors are connected with air-introduced machine.
Comparative example 1
A kind of production technology for cleaning sand, the difference from embodiment 1 is that:
Roughing sand by pre-treatment is being cleaned in desliming, is initially entered First swaging machine by surge bunker and is slightly wiped
It washes, carries out first time desliming subsequently into the first spiral deslimer, subsequently enter combination swaging machine (cleaning unit) and carry out 7 essences
It cleans, enters back into the second spiral deslimer by the roughing sand that essence is cleaned and carry out second of desliming, sunk subsequently into desliming bucket
Desliming is dropped.
This comparative example the difference from embodiment 1 is that, the step of sub-material and wet magnetic separation is omitted.
Comparative example 2
A kind of production technology for cleaning sand, the difference from embodiment 1 is that:
Roughing sand by pre-treatment is being cleaned in desliming, is initially entered spiral deslimer by surge bunker and is carried out desliming,
It subsequently enters combination swaging machine and carries out 2 essence scourings, enter back by the roughing sand that essence is cleaned into desliming bucket and carry out sedimentation desliming,
Then it is sieved.
This comparative example the difference from embodiment 1 is that, primary scouring, secondary spiral desliming, wet magnetic separation, scouring is omitted
Lack 5 essences in unit to clean, the step of sub-material and wet magnetic separation is omitted.
The obtained scouring sand of above-described embodiment 1, comparative example 1 and comparative example 2 is tested, the results showed that
The clay content for the scouring sand that embodiment obtains is 0.15-0.3%, dioxide-containing silica 90-96%, magnetisable material
Content≤1%.
And the clay content for the scouring sand that comparative example obtains is 0.3-0.5%, dioxide-containing silica 85-92%, magnetic material
Matter content >=1.5%.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of scouring sand production technology, which comprises the following steps:
Roughing sand Jing Guo pre-treatment is successively carried out to first time scouring, first time desliming, second of scouring, second of desliming, is divided
Material and wet magnetic separation.
2. scouring sand production technology according to claim 1, which is characterized in that the pre-treatment include: by roughing sand successively
First time screening is carried out, sizes mixing and buffers；
Preferably, the pre-treatment includes: to be sieved using the first screening plant to roughing sand, and size mixing equipment is recycled to be adjusted
Slurry, enters back into surge bunker and is buffered；
Preferably, the pre-treatment includes: that roughing sand first passes through delivery device discharging, is then sieved using the first screening plant
Point, it enters back into after size mixing equipment is sized mixing and surge bunker is pumped by sand pump；
Preferably, the first screening plant includes linear vibrating screen；
Preferably, the mass concentration for the mortar sized mixing is 50-70%.
3. scouring sand production technology according to claim 1, which is characterized in that be introduced into first by the roughing sand of pre-treatment
First time scouring is carried out in friction scrubbing apparatus, is entered back into progress first time desliming in the first desliming device, is then entered back into the second wiping
Wash in equipment and carry out second and clean, enter back into and carry out second of desliming in the second desliming device, enter back into distribution equipment into
Row sub-material, then magnetic separation is carried out by wet magnetic separation equipment；
Preferably, first desliming device and the second desliming device include spiral deslimer each independently；
Preferably, second friction scrubbing apparatus is the scouring unit being mainly made of multiple swaging machines, preferably mainly by 6-8
The scouring unit of swaging machine composition；
Preferably, the first time cleans and second of the time cleaned is each independently 5-30min, preferably 6-20min；
Preferably, the wet magnetic separation equipment includes wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator.
4. scouring sand production technology according to claim 1, which is characterized in that further include post-processing: by wet magnetic separation
Roughing sand post-processed, obtain clean sand；
Preferably, the post-processing includes: second of screening and dehydration；
Preferably, the post-processing includes: and enters in the second screening plant to carry out second of screening by the roughing sand of wet magnetic separation,
Scouring sand after second of screening is dehydrated by pipeline into dehydration equipment, obtains cleaning sand；
Preferably, second screening plant includes the linear vibrating screen extension set group with hydraulic sand washing device, described to have water
The linear vibrating screen extension set combination of power sand flushing device can screen out the scouring sand of plurality of specifications, be preferably able to screen out at least four
The scouring sand of kind specification；
Preferably, the dehydration equipment includes straight-line oscillation dewatering screen.
5. scouring sand production technology according to claim 1-4, which is characterized in that further include sewage recycling office
Reason: in the pre-treatment, for the first time scouring, first time desliming, second scouring, second of desliming, sub-material and wet magnetic separation
Any one or more steps in generated sewage be recycled；
Preferably, by the pre-treatment, for the first time scourings, first time desliming, for the second time scouring, second of desliming, sub-material and wet
Generated sewage transport is precipitated into sedimentation basin in any one or more steps in formula magnetic separation, then passes through filtering
Device filtering, obtains the recycle-water that can be used in cleaning sand production；
Preferably, sludge caused by precipitating and/or filter is handled by concentration, flocculation sedimentation and plate compression processing,
Obtain sludge cake.
6. a kind of method for reclaiming of antiquated sand, which is characterized in that including the described in any item scouring sand productions of claim 1-5
Technique.
7. the method for reclaiming of antiquated sand according to claim 6 characterized by comprising
Antiquated sand is pre-processed, pretreatment antiquated sand is obtained；Pretreatment antiquated sand is subjected to pre-treatment, then successively carries out first time wiping
It washes, first time desliming, second scouring, second of desliming, sub-material and wet magnetic separation；
Preferably, the method for reclaiming the following steps are included:
(a) pretreatment of antiquated sand: antiquated sand is pre-processed, and obtains pretreatment antiquated sand；
(b) pretreatment antiquated sand pre-treatment: is subjected to pre-treatment；
(c) scouring, desliming and magnetic separation: the antiquated sand by pre-treatment successively carries out first time scouring, first time desliming, wipes for second
It washes, second of desliming, sub-material and wet magnetic separation；
(d) it post-processes: being post-processed by the antiquated sand of wet magnetic separation, obtain cleaning sand；
(e) dry: obtained scouring sand being dried, reclaimed sand is obtained；
Preferably, step (e) includes: that the scouring sand that will be obtained successively is dried, second of magnetic separation and third time are sieved, and is obtained
Reclaimed sand；
Preferably, step (e) includes: and cleans sand to be introduced into drying equipment and be dried, and enters back into the second magnetic plant
Third time screening is carried out in middle progress second of magnetic separation, then third screening plant, obtains reclaimed sand；
Preferably, dry temperature is 300-400 DEG C；
Preferably, the drying equipment includes three backhaul dryers；
Preferably, second magnetic plant includes intensity magnetic separator；
Preferably, the third screening plant includes straight-line oscillation screening machine.
8. a kind of scouring sand production system, which is characterized in that the production system includes:
Roughing sand preprocessing system；
Scouring, desliming and the magnetic separation system of roughing sand: it is wiped including sequentially connected first friction scrubbing apparatus, the first desliming device, second
Wash equipment, the second desliming device, distribution equipment and wet magnetic separation equipment；The outlet of the roughing sand preprocessing system and described first
The entrance of friction scrubbing apparatus connects.
9. scouring sand production system according to claim 8, which is characterized in that scouring, desliming and the magnetic separation of the roughing sand
System include sequentially connected first friction scrubbing apparatus, the first desliming device, the second friction scrubbing apparatus, the second desliming device, desliming bucket,
Sand pump, distribution equipment and wet magnetic separation equipment；
Preferably, first desliming device and the second desliming device include spiral deslimer each independently；
Preferably, second friction scrubbing apparatus is the scouring unit being mainly made of multiple swaging machines, preferably mainly by 6-8
The scouring unit of swaging machine composition；
Preferably, the wet magnetic separation equipment includes wet drum intensity magnetic separator or wet type Verticle ring high intensity magnetic separator；
Preferably, the roughing sand preprocessing system includes sequentially connected first time screening plant, size mixing equipment and surge bunker, institute
The outlet for stating surge bunker is connect with the entrance of the first friction scrubbing apparatus；
Preferably, the roughing sand preprocessing system include sequentially connected delivery device, first time screening plant, size mixing equipment,
The outlet of sand pump and surge bunker, the surge bunker is connect with the entrance of the first friction scrubbing apparatus；
Preferably, the first screening plant includes linear vibrating screen；
Preferably, the delivery device includes the lower hopper with waterpower discharge duct；
It preferably, further include after-treatment system, the entrance of the after-treatment system is connect with the outlet of the wet magnetic separation equipment；
Preferably, the after-treatment system includes the second screening plant and dehydration equipment, and the outlet of second screening plant is logical
Pipeline is crossed to connect with the entrance of the dehydration equipment；
Preferably, the second screening plant includes the linear vibrating screen extension set group with hydraulic sand washing device, described to rush with waterpower
The linear vibrating screen extension set combination of sand device can screen out the scouring sand of plurality of specifications, be preferably able to screen out at least four rule
The scouring sand of lattice；
Preferably, dehydration equipment includes straight-line oscillation dewatering screen；
Preferably, the scouring sand production system further includes sewage recorery treatment system, the sewage recorery treatment system and institute
State in roughing sand preprocessing system, the scouring of the roughing sand, desliming and magnetic separation system or the after-treatment system any one or
Multiple system connections；
Preferably, the sewage recorery treatment system includes sedimentation basin and filter；
Preferably, the sewage recorery treatment system further includes sludge-tank, scraping and sucking machine, belt filter press.
10. a kind of system for regenerating and recycling of antiquated sand, which is characterized in that produce system including scouring sand described in claim 8 or 9
System；
Preferably, the system for regenerating and recycling further includes the pretreatment system and drying system of antiquated sand；
Preferably, the drying system includes sequentially connected drying equipment, the second magnetic plant and third screening plant；
Preferably, the drying system include sequentially connected drying equipment, surge tank, the second magnetic plant, third screening set
Standby and finished product batch can；
Preferably, the drying equipment includes three backhaul dryers；
Preferably, second magnetic plant includes intensity magnetic separator；
Preferably, the third screening plant includes straight-line oscillation screening machine.
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| CN201910714758.4A CN110293206A (en) | 2019-08-02 | 2019-08-02 | Clean sand production technology and system, the method for reclaiming of antiquated sand and system |
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| CN112403888A (en) * | 2020-10-28 | 2021-02-26 | 滦平县东伟造型材料有限公司 | Drying sand and petroleum fracturing sand composite production line |
| CN113426942A (en) * | 2021-06-24 | 2021-09-24 | 南阳仁创砂业科技有限公司 | Method for preparing precoated sand for cast steel from recycled material |
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