CN101397197A - Method for producing modified sodium silicate sand - Google Patents

Method for producing modified sodium silicate sand Download PDF

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Publication number
CN101397197A
CN101397197A CNA2007101522884A CN200710152288A CN101397197A CN 101397197 A CN101397197 A CN 101397197A CN A2007101522884 A CNA2007101522884 A CN A2007101522884A CN 200710152288 A CN200710152288 A CN 200710152288A CN 101397197 A CN101397197 A CN 101397197A
Authority
CN
China
Prior art keywords
sodium silicate
sand
water glass
modified
modified sodium
Prior art date
Application number
CNA2007101522884A
Other languages
Chinese (zh)
Inventor
席惠军
康韶光
李嘉
姚燕祥
Original Assignee
中煤张家口煤矿机械有限责任公司
Priority date (The priority date 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 date listed.)
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Application filed by 中煤张家口煤矿机械有限责任公司 filed Critical 中煤张家口煤矿机械有限责任公司
Priority to CNA2007101522884A priority Critical patent/CN101397197A/en
Publication of CN101397197A publication Critical patent/CN101397197A/en

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Abstract

The invention relates to the technical field of the method for manufacturing foundry sand, in particular to a method for manufacturing modified sodium silicate sand, and more particularly to a method for manufacturing VRH modified sodium silicate sand used in the VRH (vacuum replacement CO2 sodium silicate sand hardening process) cast steel production line. Sodium polyacrylate solution with 30% of concentration of 5-7% of the weight of the sodium silicate is added in the common sodium silicate, and modified sodium silicate is made; the obtained sodium silicate has the highest strength after 24 hours, and the effective period is three days. By adding additive in the common sodium silicate, under the condition that cost is increased by a little, the strength of sand mold thereof is improved by 35%; and the method has the advantages of improving collapsibility of the sand mold, reducing labor intensity for cleaning and saving cleaning up expense.

Description

A kind of method for producing modified sodium silicate sand
Technical field
The present invention relates to the making method technical field of foundry sand, specifically a kind of method for producing modified sodium silicate sand is applied to the making method of a kind of VRH modified sodium silicate sand in VRH (vacuum displacement CO2 sodium silicate sand hardening process) the cast steel production line.
Background technology
Foundry sand has clay-bonded sand, sodium silicate sand, resin sand etc. several.Wherein sodium silicate sand has good fluidity, easily consolidation, cost is moderate, nonpoisonous and tasteless, labour intensity is low characteristics, therefore is cast steel production sand mold commonly used, but that sodium silicate sand exists intensity is low, and sand mold easily cracks during the returning buckle case; Collapsibility is poor, deficiencies such as peeling difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of method for producing modified sodium silicate sand,, thereby improved casting quality, reduce the chipping workload with the intensity and the collapsibility of raising ortho-water glass sand.
The technical solution adopted in the present invention is:
1. under the processing condition of 10~30 ℃ of room temperatures, 20~50 ℃ of water glass temperature, in being 50 °~52 ° water glass, degree Beaume adds 5%~7% of water glass weight, and concentration is 30% sodium polyacrylate solution, makes modified water glass after stirring evenly;
2. at the modified water glass of casting, obtain high-intensity sand mold after stirring evenly with adding quartz sand weight ratio 4~4.5% in the quartz sand;
3. the modified water glass validity period that configures is 3 days.
The invention has the beneficial effects as follows:, under a small amount of situation about increasing of cost, make its sand mold intensity improve 35% by in ortho-water glass, adding additive; Improve the sand mold collapsibility, alleviate cleaning labour intensity, save cleaning up cost.
Embodiment
Aborning, earlier be that 50 °~52 ° ortho-water glass are put into quantitative scale and had the water glass jar of whipping device with degree Beaume, press the sodium polyacrylate solution that 6% of ortho-water glass weight adds concentration 30% then, stir and made modified water glass in 1~2 minute.In the VRH moulding is produced, in quartz sand, add 4~4.5% modified water glass (add winter 4%, summer add 4.5%), obtain high-intensity modified sodium silicate sand after stirring evenly, improved sand mold intensity and sand mold collapsibility greatly according to the variation of temperature.
Be that 5%, 6%, 7%, 8% concentration that adds water glass weight respectively in ortho-water glass is the modified water glass made of 30% sodium polyacrylate solution and uses ortho-water glass merely shown in the table 1, influence rule (data are the mean value of 15 groups of testing datas in the table) to 24 hours intensity of sand mold when other conditions are identical.As can be seen from the table, in ortho-water glass, add a certain amount of sodium polyacrylate, can significantly improve the maximum intensity of sand mold in the time of 24 hours.When sodium polyacrylate content was water glass weight 6%, 24 hours intensity of sand mold was the highest, improved about 35% than ortho-water glass intensity.
Be in ortho-water glass, to add the modified water glass that the sodium polyacrylate solution allocation of the concentration 30% of water glass weight 6% becomes shown in the table 2, configuration used the same day with place 1~5 day after use the rule that influences to 24 hours intensity of sand mold.As can be seen from the table, the modified water glass that configures has the problem of a degradation failure in depositing process, and therefore, the modified water glass that configures should use as early as possible, is no more than 3 days at most.

Claims (2)

1. method for producing modified sodium silicate sand is characterized in that: add 5%~7% of water glass weight in degree Beaume is 50 °~52 ° water glass, concentration is 30% sodium polyacrylate solution, makes modified water glass after stirring evenly; With the modified water glass that adds quartz sand weight 4~4.5% in the quartz sand, obtain high-intensity sand mold in casting after stirring evenly.
2. a kind of method for producing modified sodium silicate sand as claimed in claim 1 is characterized by: the modified water glass validity period that configures is 3 days.
CNA2007101522884A 2007-09-24 2007-09-24 Method for producing modified sodium silicate sand CN101397197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2007101522884A CN101397197A (en) 2007-09-24 2007-09-24 Method for producing modified sodium silicate sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007101522884A CN101397197A (en) 2007-09-24 2007-09-24 Method for producing modified sodium silicate sand

Publications (1)

Publication Number Publication Date
CN101397197A true CN101397197A (en) 2009-04-01

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CNA2007101522884A CN101397197A (en) 2007-09-24 2007-09-24 Method for producing modified sodium silicate sand

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101934349A (en) * 2010-09-15 2011-01-05 昆明理工大学 Method for joint modification of water glass for casting
CN102366812A (en) * 2011-10-11 2012-03-07 许立新 Preparation method for sodium silicate sand used for casting
CN104259380A (en) * 2014-10-25 2015-01-07 哈尔滨理工大学 Composite modified water glass sand with high collapsibility and preparation method thereof
CN104338893A (en) * 2013-07-26 2015-02-11 沈阳铸造研究所 Sodium silicate sand with high fluidity and preparation method thereof
CN105414458A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 High-compressive-strength composite modified sodium silicate sand for pump valve castings, and preparation method thereof
CN105414459A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof
CN107737867A (en) * 2017-09-28 2018-02-27 江苏闽江矿业有限公司 A kind of modified sodium silicate sand
CN109320130A (en) * 2018-10-29 2019-02-12 郑州远东耐火材料有限公司 A kind of fused cast refractories sand mold modified water glass bonding agent and preparation method thereof
CN110015863A (en) * 2019-04-17 2019-07-16 郑州纬通耐火材料科技有限公司 A kind of modifying agent of fused cast refractories casting sand type waterglass and its modified water glass of preparation

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101934349A (en) * 2010-09-15 2011-01-05 昆明理工大学 Method for joint modification of water glass for casting
CN102366812A (en) * 2011-10-11 2012-03-07 许立新 Preparation method for sodium silicate sand used for casting
CN102366812B (en) * 2011-10-11 2016-01-20 华文蔚 A kind of preparation method of sodium silicate sand used for casting
CN104338893A (en) * 2013-07-26 2015-02-11 沈阳铸造研究所 Sodium silicate sand with high fluidity and preparation method thereof
CN104338893B (en) * 2013-07-26 2016-08-17 沈阳铸造研究所 A kind of water-glass sand with high fluidity and preparation method thereof
CN104259380A (en) * 2014-10-25 2015-01-07 哈尔滨理工大学 Composite modified water glass sand with high collapsibility and preparation method thereof
CN105414458A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 High-compressive-strength composite modified sodium silicate sand for pump valve castings, and preparation method thereof
CN105414459A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof
CN107737867A (en) * 2017-09-28 2018-02-27 江苏闽江矿业有限公司 A kind of modified sodium silicate sand
CN109320130A (en) * 2018-10-29 2019-02-12 郑州远东耐火材料有限公司 A kind of fused cast refractories sand mold modified water glass bonding agent and preparation method thereof
CN109320130B (en) * 2018-10-29 2020-11-10 郑州远东耐火材料有限公司 Modified water glass adhesive for sand mold of electric melting brick and preparation method thereof
CN110015863A (en) * 2019-04-17 2019-07-16 郑州纬通耐火材料科技有限公司 A kind of modifying agent of fused cast refractories casting sand type waterglass and its modified water glass of preparation

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