CN106001402A - Regeneration treatment method for phenolic resin self-hardening sand - Google Patents
Regeneration treatment method for phenolic resin self-hardening sand Download PDFInfo
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- CN106001402A CN106001402A CN201610354813.XA CN201610354813A CN106001402A CN 106001402 A CN106001402 A CN 106001402A CN 201610354813 A CN201610354813 A CN 201610354813A CN 106001402 A CN106001402 A CN 106001402A
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- sand
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- phenolic resin
- regeneration
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Classifications
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- 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
- B22C5/04—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
- B22C5/08—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a regeneration treatment method for phenolic resin self-hardening sand. The method comprises the following steps: (1) carrying out pretreatment; (2) treating the pretreatment sand treated in step (1) with a silica sand scrubbing machine, wherein during scrubbing, the feeding concentration is 33%, drying the sand after scrubbing treatment, and carrying out magnetic separation treatment with a magnetic separator, wherein during magnetic separation, the magnetic field intensity is 0.65-0.8T, thus obtaining secondarily treated sand; (3) mixing the secondarily treated sand with a mixed solution according to weigh ratio of 1:2.5, removing suspended solids and filtering to obtain thrice treated sand; and (4) washing and drying the thrice treated sand obtained in step (3) to obtain regeneration sand. The method can remarkably increase the removal rate of phenolic resin and sodion, and the treated regeneration sand has LOl of less than 0.2% and Na2O content of less than 0.05%; and furthermore, a sand mould prepared by adopting the regeneration sand is high in stability and can effectively prevent the occurrence of air holes, sand holes and cracks.
Description
Technical field
The invention belongs to casting field, be specifically related to the regeneration treating 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 regeneration treating 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 regeneration treating 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 potassium citrate 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 4m3It 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 22 parts, sodium allylsulfonate 2.5 parts, dodecyl sodium sulfate 1.2 parts, 8 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 regeneration treating 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 ＜ 0.2% of reclaimed sand, Na after process2O content is less than 0.05%, and the old sand response rate reaches 90%, 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 regeneration treating method of a kind of phenolic resin self-hardening sand, it is characterised in that comprise the following steps:
(1), 100kg old sand is crushed, cross 40 mesh sieves, old sand is put into the kitchen sink of 1000L, the potassium citrate 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 4m3It 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 22 parts, sodium allylsulfonate 2.5 parts, dodecyl sodium sulfate 1.2 parts, 8 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 regeneration treating 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 potassium citrate 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 4m3It 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 22 parts, sodium allylsulfonate 2.5 parts, dodecyl sodium sulfate 1.2 parts, 8 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 |
|---|---|---|---|
| CN201610354813.XA CN106001402A (en) | 2016-05-26 | 2016-05-26 | Regeneration treatment method for phenolic resin self-hardening sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610354813.XA CN106001402A (en) | 2016-05-26 | 2016-05-26 | Regeneration treatment method for phenolic resin self-hardening sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106001402A true CN106001402A (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610354813.XA Pending CN106001402A (en) | 2016-05-26 | 2016-05-26 | Regeneration treatment method for phenolic resin self-hardening sand |
Country Status (1)
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| CN (1) | CN106001402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918873A (en) * | 2019-11-20 | 2020-03-27 | 江门市汇坤科技有限公司 | Casting waste sand recovery system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101780522A (en) * | 2010-03-05 | 2010-07-21 | 昆明理工大学 | Method for magnetic separation and regeneration of molding clay-resin mixed used sand |
| CN101801561A (en) * | 2007-09-12 | 2010-08-11 | 花王株式会社 | Method for production of regenerated foundry sand |
| CN102000764A (en) * | 2010-12-17 | 2011-04-06 | 重庆长江造型材料（集团）有限公司 | Chemical regeneration method in casting waste sand disposing process |
| CN103341587A (en) * | 2013-07-09 | 2013-10-09 | 临沂市铸宝水表有限公司 | Precoated sand and burn-free regeneration technology thereof |
-
2016
- 2016-05-26 CN CN201610354813.XA patent/CN106001402A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0500810A (en) * | 2005-01-18 | 2006-09-05 | Guifa Equipamentos Para Fundic | synthetic alkaline sand and foundry green sand regeneration system |
| CN101801561A (en) * | 2007-09-12 | 2010-08-11 | 花王株式会社 | Method for production of regenerated foundry sand |
| 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 |
| CN101780522A (en) * | 2010-03-05 | 2010-07-21 | 昆明理工大学 | Method for magnetic separation and regeneration of molding clay-resin mixed used sand |
| CN102000764A (en) * | 2010-12-17 | 2011-04-06 | 重庆长江造型材料（集团）有限公司 | Chemical regeneration method in casting waste sand disposing process |
| CN103341587A (en) * | 2013-07-09 | 2013-10-09 | 临沂市铸宝水表有限公司 | Precoated sand and burn-free regeneration technology thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918873A (en) * | 2019-11-20 | 2020-03-27 | 江门市汇坤科技有限公司 | Casting waste sand recovery system and method |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20161012 |