CN105945217A - Treatment method of phenolic resin self-hardening sand - Google Patents
Treatment method of phenolic resin self-hardening sand Download PDFInfo
- Publication number
- CN105945217A CN105945217A CN201610354822.9A CN201610354822A CN105945217A CN 105945217 A CN105945217 A CN 105945217A CN 201610354822 A CN201610354822 A CN 201610354822A CN 105945217 A CN105945217 A CN 105945217A
- Authority
- CN
- China
- Prior art keywords
- sand
- parts
- treated
- treatment method
- phenolic resin
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000004576 sand Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000005011 phenolic resin Substances 0.000 title claims abstract description 16
- 229920001568 phenolic resin Polymers 0.000 title claims abstract description 16
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 title claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 239000006148 magnetic separator Substances 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 230000009514 concussion Effects 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000001117 sulphuric acid Substances 0.000 claims description 3
- 235000011149 sulphuric acid Nutrition 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 229910001415 sodium ion Inorganic materials 0.000 abstract description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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
- B22C5/04—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
-
- 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
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a treatment method of phenolic resin self-hardening sand. The treatment method comprises the following steps: (1) the pretreatment is performed; (2) pretreated sand treated in the step (1) is treated by using a silica sand swaging machine; during swaging, the feeding concentration is 33%; the swaged sand is dried, and is magnetically separated by using a magnetic separator; in magnetic separation, the magnetic field strength is 0.65-0.8 T; and secondary treated sand is obtained; (3) the secondary treated sand and mixed solution are mixed according to a weight ratio of 1: 2.5; suspended matters are removed; and ternary treated sand is obtained through filtration; and (4) the ternary treated sand obtained in the step (3) is washed by water and dried to obtain regenerated sand. The treatment method can obviously increase the removal rate of phenolic resins and sodium ions; LO1 of the regenerated sand after treatment is lower than 0.4%; the content of Na2O is lower than 0.06%; a sand mold prepared by the regenerated sand is high in stability; and such defects as air holes, sand holes and cracks can be effectively prevented.
Description
Technical field
The invention belongs to casting field, be specifically related to the processing method of a kind of phenolic resin self-hardening sand.
Background technology
China is big country in foundry, when casting, often one ton of foundry goods of casting about produces 1.5 tons of cast used sands, the annual cast used sand yield of China reaches more than 50,000,000 tons, much using the mode buried to process, although having some phenolic resin self-hardening sand old sand recovery methods now, and phenolic resin removal rate therein is relatively low, cause again with time, cause hardening effect difference or defect easily occurs.
Summary of the invention
It is an object of the invention to provide the processing method of a kind of phenolic resin self-hardening sand, the clearance of the phenolic resin in old sand and sodium can be promoted, promote the effect of regeneration.
The present invention is achieved through the following technical solutions:
The processing method of a kind of phenolic resin self-hardening sand, comprises the following steps:
(1), being crushed by 100kg old sand, cross 40 mesh sieves, old sand is put into kitchen sink, the citric acid solution using 300L mass fraction to be 2% soaks, and uses ultrasound wave to process in immersion process, and ultrasonic frequency is 25-28KHz, after concussion 10min, by 2m3It is the ammonia of 6% that the flow of/h adds mass fraction, and ammonia addition is 235L, stir process 12-15min at 25 DEG C, filters, and removes filtrate, obtains pretreatment sand；
(2) the pretreatment sand, by step (1) handled well uses silica sand swaging machine to process, and during scrub process, input concentration is 33%, sand after scrub process is dried, uses magnetic separator to carry out magnetic separation process, during magnetic separation, magnetic field intensity is 0.72T, obtains after-treatment sand；
(3), by the ratio mix and blend of after-treatment sand with mixed solution 1:3 by weight, remove float, filter, obtaining three times and process sand, mixed solution is by weight being made up of following raw material: 100 parts of water, 25 parts of sulphuric acid, diesel oil 20 parts, sodium allylsulfonate 0.85 part, dodecyl sodium sulfate 1.2 parts, 12 parts of nitric acid；
(4), carry out washing, drying by three times obtained in step (3) process sand, obtain reclaimed sand.
Beneficial effects of the present invention: the processing method of the casting phenolic resin self-hardening sand that the present invention provides is difficult to for phenolic resin self-hardening sand old sand phenolic resin separate the characteristic removed, use and first use cleaning mixture to soak, then clean, magnetic separation processes, carry out flotation again, and accurately control temperature and the process time of each step, the clearance of phenolic resin and sodium ion can be obviously improved, the LOl ＜ 0.4% of reclaimed sand, Na after process2O content is less than 0.06%, and the old sand response rate can reach 90-92%, and sand mo(u)ld stability prepared by reclaimed sand is high, can effectively prevent pore, sand holes, crackle etc., and the mixed solution of the present invention can also be reused after treatment, reduces processing cost.
Detailed description of the invention
The processing method of a kind of phenolic resin self-hardening sand, comprises the following steps:
(1), being crushed by 100kg old sand, cross 40 mesh sieves, old sand is put into kitchen sink, the citric acid solution using 300L mass fraction to be 2% soaks, and uses ultrasound wave to process in immersion process, and ultrasonic frequency is 25-28KHz, after concussion 10min, by 2m3It is the ammonia of 6% that the flow of/h adds mass fraction, and ammonia addition is 235L, stir process 12-15min at 25 DEG C, filters, and removes filtrate, obtains pretreatment sand；
(2) the pretreatment sand, by step (1) handled well uses silica sand swaging machine to process, and during scrub process, input concentration is 33%, sand after scrub process is dried, uses magnetic separator to carry out magnetic separation process, during magnetic separation, magnetic field intensity is 0.72T, obtains after-treatment sand；
(3), by the ratio mix and blend of after-treatment sand with mixed solution 1:3 by weight, remove float, filter, obtaining three times and process sand, mixed solution is by weight being made up of following raw material: 100 parts of water, 25 parts of sulphuric acid, diesel oil 20 parts, sodium allylsulfonate 0.85 part, dodecyl sodium sulfate 1.2 parts, 12 parts of nitric acid；
(4), carry out washing, drying by three times obtained in step (3) process sand, obtain reclaimed sand.
Claims (1)
1. the processing method of a phenolic resin self-hardening sand, it is characterised in that comprise the following steps:
(1), being crushed by 100kg old sand, cross 40 mesh sieves, old sand is put into kitchen sink, the citric acid solution using 300L mass fraction to be 2% soaks, and uses ultrasound wave to process in immersion process, and ultrasonic frequency is 25-28KHz, after concussion 10min, by 2m3It is the ammonia of 6% that the flow of/h adds mass fraction, and ammonia addition is 235L, stir process 12-15min at 25 DEG C, filters, and removes filtrate, obtains pretreatment sand；
(2) the pretreatment sand, by step (1) handled well uses silica sand swaging machine to process, and during scrub process, input concentration is 33%, sand after scrub process is dried, uses magnetic separator to carry out magnetic separation process, during magnetic separation, magnetic field intensity is 0.72T, obtains after-treatment sand；
(3), by the ratio mix and blend of after-treatment sand with mixed solution 1:3 by weight, remove float, filter, obtaining three times and process sand, mixed solution is by weight being made up of following raw material: 100 parts of water, 25 parts of sulphuric acid, diesel oil 20 parts, sodium allylsulfonate 0.85 part, dodecyl sodium sulfate 1.2 parts, 12 parts of nitric acid；
(4), carry out washing, drying by three times obtained in step (3) process sand, obtain reclaimed sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610354822.9A CN105945217A (en) | 2016-05-26 | 2016-05-26 | Treatment method of phenolic resin self-hardening sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610354822.9A CN105945217A (en) | 2016-05-26 | 2016-05-26 | Treatment method of phenolic resin self-hardening sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105945217A true CN105945217A (en) | 2016-09-21 |
Family
ID=56909681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610354822.9A Pending CN105945217A (en) | 2016-05-26 | 2016-05-26 | Treatment method of phenolic resin self-hardening sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105945217A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221093C1 (en) * | 1992-06-26 | 1994-01-13 | Buderus Heiztechnik Gmbh | Casting sand recovery - detaches sand from the casting in two cleaning stages to give separate types bonded only with clay and only with resin |
| EP0687514A1 (en) * | 1994-06-15 | 1995-12-20 | Georg Fischer Giessereianlagen Ag | Process and apparatus for reclaiming sand |
| JP2001038449A (en) * | 1999-07-29 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Casting sand regeneration treatment device and casting sand regeneration method |
| BRPI0500810A (en) * | 2005-01-18 | 2006-09-05 | Guifa Equipamentos Para Fundic | synthetic alkaline sand and foundry green sand regeneration system |
| CN101695680A (en) * | 2009-10-22 | 2010-04-21 | 南京阳山硅材料科技有限公司 | Autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production |
| CN102615243A (en) * | 2012-03-27 | 2012-08-01 | 华中科技大学 | Foundry used sand wet intermittent regeneration method and equipment thereof |
| CN203184573U (en) * | 2012-12-17 | 2013-09-11 | 莱芜市大众机械制造有限公司 | Resin sand regeneration equipment |
| CN203448601U (en) * | 2013-09-05 | 2014-02-26 | 浙江包氏铸造有限公司 | Automatic resin-sand regeneration system |
| CN104162628A (en) * | 2013-05-16 | 2014-11-26 | 雷士文 | Method and device for peeling off attachments on surfaces of waste casting sands |
| CN105081213A (en) * | 2015-09-08 | 2015-11-25 | 台州市陈氏铜业有限公司 | Production technology for precoated sand recycling |
-
2016
- 2016-05-26 CN CN201610354822.9A patent/CN105945217A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221093C1 (en) * | 1992-06-26 | 1994-01-13 | Buderus Heiztechnik Gmbh | Casting sand recovery - detaches sand from the casting in two cleaning stages to give separate types bonded only with clay and only with resin |
| EP0687514A1 (en) * | 1994-06-15 | 1995-12-20 | Georg Fischer Giessereianlagen Ag | Process and apparatus for reclaiming sand |
| JP2001038449A (en) * | 1999-07-29 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Casting sand regeneration treatment device and casting sand regeneration method |
| BRPI0500810A (en) * | 2005-01-18 | 2006-09-05 | Guifa Equipamentos Para Fundic | synthetic alkaline sand and foundry green sand regeneration system |
| CN101695680A (en) * | 2009-10-22 | 2010-04-21 | 南京阳山硅材料科技有限公司 | Autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production |
| CN102615243A (en) * | 2012-03-27 | 2012-08-01 | 华中科技大学 | Foundry used sand wet intermittent regeneration method and equipment thereof |
| CN203184573U (en) * | 2012-12-17 | 2013-09-11 | 莱芜市大众机械制造有限公司 | Resin sand regeneration equipment |
| CN104162628A (en) * | 2013-05-16 | 2014-11-26 | 雷士文 | Method and device for peeling off attachments on surfaces of waste casting sands |
| CN203448601U (en) * | 2013-09-05 | 2014-02-26 | 浙江包氏铸造有限公司 | Automatic resin-sand regeneration system |
| CN105081213A (en) * | 2015-09-08 | 2015-11-25 | 台州市陈氏铜业有限公司 | Production technology for precoated sand recycling |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |