CN103962512A - Composite hardener for soluble glass shell manufacture adopting investment casting as well as preparation method of composite hardener - Google Patents
Composite hardener for soluble glass shell manufacture adopting investment casting as well as preparation method of composite hardener Download PDFInfo
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- CN103962512A CN103962512A CN201410137672.7A CN201410137672A CN103962512A CN 103962512 A CN103962512 A CN 103962512A CN 201410137672 A CN201410137672 A CN 201410137672A CN 103962512 A CN103962512 A CN 103962512A
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- mgcl
- composite hardener
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- hardener
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Abstract
The invention provides a composite hardener for soluble glass shell manufacture adopting investment casting as well as a preparation method of the composite hardener, belongs to a composite hardener for glass shell manufacture, and mainly solves the technical problems that the conventional composite hardener for glass shell manufacture radiates out strong and sharp odor, the surface quality of a surface layer is difficult to improve, the utilization rate of ammonium chloride and magnesium chloride is low, workshop operation is difficult, detects exist during separate application of ammonium chloride and magnesium chloride and the like. The key point of the technical scheme is that the composite hardener comprises MgCl2, NH4CL and Na2SiO3, and the principles are as follows: NH4CL plus Na2SiO3 is equal to NH3 plus NaCl plus SiO2, MgCl2 plus Na2SiO3 is equal to Mg (OH)2 plus NaCl plus SiO2, MgCl2 plus NH3 plus H2O is equal to NH4CL plus Mg(OH)2, and Mg(OH)2 plus HCl is equal to MgCl2 plus H2O. The composite hardener is mainly used for soluble glass shell manufacture adopting investment casting.
Description
Technical field
The present invention relates to a kind of glass shell processed composite hardener and preparation method thereof, particularly a kind of model casting waterglass shell processed composite hardener and preparation method thereof.
Background technology
At present, model casting sodium silicate shell surface layer and transition zone generally use ammonium chloride or aluminium chloride hardening bath to harden separately, the more difficult lifting of facing surface quality, and ammonium chloride sclerosis time gives out strong pungent ammonia, and magnesium chloride has one pungent stink while sclerosis separately.
Summary of the invention
The object of this invention is to provide a kind of ammonia of eliminating overflows, greatly improves site environment, greatly improves the utilization rate of ammonium chloride and magnesium chloride, effectively solves the poor problem of slow surface quality of hardening when the severe phenomenon of environment that ammonium chloride when sclerosis causes and magnesium chloride use separately, raises the efficiency with quality, without carrying out powder proportioning, being easy to model casting waterglass shell use processed composite hardener of workshop execute-in-place and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: it comprises magnesium chloride Mg Cl to principle of the present invention as follows
2, ammonium chloride NH
4cL, sodium metasilicate Na
2siO
3, principle of the present invention: NH
4cL+Na
2siO
3=NH
3+ NaCl+SiO
2, MgCl
2+ Na
2siO
3=Mg (OH)
2+ NaCl+SiO
2, MgCl
2+ NH
3+ H
2o=NH
4cL+Mg (OH)
2, Mg (OH)
2+ HCl=MgCl
2+ H
2o.
Preparation method of the present invention: crystal aluminum chloride is added in setting tank, until white crystal grain is separated out in setting tank bottom, with waddy by bottom NH
4cL stir, precipitate about 5 minutes as bottom still adularescent crystal grain be saturated solution, by MgCl
2add NH
4in CL saturated solution, stir stand-by, measure the pH value of solution every day, keep pH value between 5-6, uses while finding after 5-7 days that a large amount of white cotton flocculent deposit is arranged at sedimentation basin bottom, interpolation hydrochloric acid carries out MgCl
2reuse, need check whether adularescent crystal grain precipitation of hardening bath bottom every day, as nothing, add in time NH
4cL and MgCl
2.
White crystal grain of the present invention is NH
4cL.
The invention has the beneficial effects as follows: the present invention is without carrying out powder proportioning, be easy to workshop execute-in-place, eliminate the effusion of ammonia, greatly improve site environment, add the ammonium chloride generating after magnesium chloride and add the magnesium chloride generating after hydrochloric acid and can use as curing agent, greatly improve the utilization rate of ammonium chloride and magnesium chloride, the severe phenomenon of environment that compound curing agent has caused while having solved ammonium chloride sclerosis and the magnesium chloride poor problem of slow surface quality of hardening while use separately, has not only improved efficiency but also has improved quality.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further details.
Embodiment 1, the present invention includes magnesium chloride Mg Cl
2, ammonium chloride NH
4cL, sodium metasilicate Na
2siO
3, principle of the present invention: NH
4cL+Na
2siO
3=NH
3+ NaCl+SiO
2, MgCl
2+ Na
2siO
3=Mg (OH)
2+ NaCl+SiO
2, MgCl
2+ NH
3+ H
2o=NH
4cL+Mg (OH)
2, Mg (OH)
2+ HCl=MgCl
2+ H
2o.
Embodiment 2, preparation method of the present invention: crystal aluminum chloride is added in setting tank, until white crystal grain is separated out in setting tank bottom, with waddy by bottom NH
4cL stir, precipitate about 5 minutes as bottom still adularescent crystal grain be saturated solution, by MgCl
2add NH
4in CL saturated solution, stir stand-by, measure the pH value of solution every day, keep pH value between 5-6, uses while finding after 5-7 days that a large amount of white cotton flocculent deposit is arranged at sedimentation basin bottom, interpolation hydrochloric acid carries out MgCl
2reuse, need check whether adularescent crystal grain precipitation of hardening bath bottom every day, as nothing, add in time NH
4cL and MgCl
2.All the other are with embodiment 1.
Embodiment 3, white crystal grain of the present invention is NH
4cL.All the other same above-described embodiments.
Embodiment 4, solution ratio 1.2M*2M setting tank of the present invention adds half water, adds 200kg crystal aluminum chloride, observes bottom and has or not precipitation, and with waddy stirring, precipitate 5 minutes, carries out next step, otherwise add ammonium chloride as bottom still has precipitation; Add 100kg magnesium chloride, stir, whether dissolving can.All the other same above-described embodiments.
Embodiment 5, solution inspection of the present invention and maintenance: check bottom precipitation every day, as added ammonium chloride without precipitation and adding magnesium chloride by 1/2 ratio, check solution pH value every day, keep between 5-6, within every 5 days, check bottom flocculence precipitation, add hydrochloric acid and carry out the reuse of magnesium chloride, do not have two weeks to check NaCl content, if when NaCl content exceedes 8%, the obtain solution that need again add water, while having ready conditions, whole groove solution is prepared again.All the other same above-described embodiments.
Claims (3)
1. a model casting waterglass shell composite hardener processed, is characterized in that: it comprises magnesium chloride (MgCl
2), ammonium chloride (NH
4cL), sodium metasilicate (Na
2siO
3), principle of the present invention: NH
4cL+Na
2siO
3=NH
3+ NaCl+SiO
2, MgCl
2+ Na
2siO
3=Mg (OH)
2+ NaCl+SiO
2, MgCl
2+ NH
3+ H
2o=NH
4cL+Mg (OH)
2, Mg (OH)
2+ HCl=MgCl
2+ H
2o.
2. a preparation method for composite hardener for model casting waterglass shell processed, is characterized in that: crystal aluminum chloride is added in setting tank, until white crystal grain is separated out in setting tank bottom, with waddy by bottom NH
4cL stir, precipitate about 5 minutes as bottom still adularescent crystal grain be saturated solution, by MgCl
2add NH
4in CL saturated solution, stir stand-by, measure the pH value of solution every day, keep pH value between 5-6, uses while finding after 5-7 days that a large amount of white cotton flocculent deposit is arranged at sedimentation basin bottom, interpolation hydrochloric acid carries out MgCl
2reuse, need check whether adularescent crystal grain precipitation of hardening bath bottom every day, as nothing, add in time NH
4cL and MgCl
2.
3. the preparation method of composite hardener for model casting waterglass according to claim 2 shell processed, is characterized in that: described white crystal grain is NH
4cL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137672.7A CN103962512A (en) | 2014-04-08 | 2014-04-08 | Composite hardener for soluble glass shell manufacture adopting investment casting as well as preparation method of composite hardener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137672.7A CN103962512A (en) | 2014-04-08 | 2014-04-08 | Composite hardener for soluble glass shell manufacture adopting investment casting as well as preparation method of composite hardener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103962512A true CN103962512A (en) | 2014-08-06 |
Family
ID=51232786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410137672.7A Pending CN103962512A (en) | 2014-04-08 | 2014-04-08 | Composite hardener for soluble glass shell manufacture adopting investment casting as well as preparation method of composite hardener |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525847A (en) * | 2014-12-22 | 2015-04-22 | 南京优耐特精密机械制造有限公司 | Shell hardening agent |
| CN108145091A (en) * | 2017-12-18 | 2018-06-12 | 定远县宝隆机械制造有限公司 | A kind of case hardening agent prescription of model casting |
| CN108145090A (en) * | 2017-12-18 | 2018-06-12 | 定远县宝隆机械制造有限公司 | A kind of investment casting shell composite hardening agent prescription |
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2014
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525847A (en) * | 2014-12-22 | 2015-04-22 | 南京优耐特精密机械制造有限公司 | Shell hardening agent |
| CN108145091A (en) * | 2017-12-18 | 2018-06-12 | 定远县宝隆机械制造有限公司 | A kind of case hardening agent prescription of model casting |
| CN108145090A (en) * | 2017-12-18 | 2018-06-12 | 定远县宝隆机械制造有限公司 | A kind of investment casting shell composite hardening agent prescription |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140806 |
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| RJ01 | Rejection of invention patent application after publication |