CN105414459A - High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof - Google Patents

High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof Download PDF

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Publication number
CN105414459A
CN105414459A CN201510816162.7A CN201510816162A CN105414459A CN 105414459 A CN105414459 A CN 105414459A CN 201510816162 A CN201510816162 A CN 201510816162A CN 105414459 A CN105414459 A CN 105414459A
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CN
China
Prior art keywords
sand
sodium silicate
uniformly mixed
pump valve
castings
Prior art date
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
Application number
CN201510816162.7A
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Chinese (zh)
Inventor
李诺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Linuo New Materials Trade Co Ltd
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Hefei Linuo New Materials Trade Co Ltd
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Publication date
Application filed by Hefei Linuo New Materials Trade Co Ltd filed Critical Hefei Linuo New Materials Trade Co Ltd
Priority to CN201510816162.7A priority Critical patent/CN105414459A/en
Publication of CN105414459A publication Critical patent/CN105414459A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • B22C1/188Alkali metal silicates

Abstract

The invention discloses high-thermal-conductivity composite modified sodium silicate sand for pump valve castings. A modified sodium silicate binder in the sodium silicate sand is higher in constant-temperature wet strength, thixotropy and rheological property compared with a conventional modified sodium silicate binder, high in reaction binding activity, and green and environment-friendly, and the dosage of sodium silicate is lower; in addition, beryllium oxide in raw materials is capable of effectively improving the thermal conductivity of moulding sand, and preventing sand inclusion of the castings, and bentonite-supported nano-calcium fluoride has lubrication and reinforcement effects in case of being dispersed in sand materials, and capable of forming a non-stick impermeable layer, preventing sand sticking of the castings, and improving the surface quality of the castings; and the composite modified sodium silicate sand is excellent in comprehensive performance, uniform in strength, high in casting quality, and capable of meeting the pouring requirements of the high-accuracy pump valve castings.

Description

A kind of pump valve foundry goods composite modified water-glass sand of high heat conduction and preparation method thereof
Technical field
The present invention relates to water-glass sand technical field, particularly relate to composite modified water-glass sand of the high heat conduction of a kind of pump valve foundry goods and preparation method thereof.
Background technology
Molding sand is mainly used for the material of moulding in casting according to the class that different ratios is mixed by sand material, bonding agent and adminicle etc., different according to the bonding agent used, clay-bonded sand, water-glass sand, resin sand etc. can be divided into, wherein water-glass sand has that intensity is high, cost is low, technique is simple, pollute the advantages such as little, is widely used.
Pump, valve foundry goods have the features such as wall is thin, complex-shaped, particularly strict to the quality requirement of molding sand in casting process, the quality of molding sand is also the key factor being related to casting quality, although there is significant advantage in sodium silicate sand, also there is a lot of shortcoming simultaneously, obvious defect is mainly manifested in that normal temperature strength is low, collapsibility is poor, regenerating used is difficult, if do not carried out modification to it, is difficult to the quality improving pump valve foundry goods.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides composite modified water-glass sand of the high heat conduction of a kind of pump valve foundry goods and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of pump valve foundry goods composite modified water-glass sand of high heat conduction, this water-glass sand is prepared by the raw material of following weight portion: 50-80 order clinker of kaolin 30-40,80-120 order electro-corundum sand 30-40, beryllium oxide 10-15, hydroxyapatite 1-1.5, graphite powder 1-2, modified water glass bonding agent 1.5-2, bentonite 2-3, Choline Chloride 0.1-0.2, nano calcium fluoride 0.4-0.5,50% ethanol water 8-10, silane coupler 0.1-0.2.
Described modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 12-15 of 40-50 Baume degrees, aluminium-magnesium silicate 0.1-0.2, bacteria cellulose 2-3, quaternary ammonium salt ionic liquid 6-8; Its modification method for preparing is: first drop in quaternary ammonium salt ionic liquid by bacteria cellulose, be heated to 40-50 DEG C, be uniformly mixed 2-3h, adds other leftover materials subsequently, continues to be uniformly mixed 40-50min, to obtain final product.
The preparation method of described modified sodium silicate sand is:
(1) first nano calcium fluoride, silane coupler are added in ethanol water, ultrasonic agitation dispersion 40-50min, obtain nano calcium fluoride dispersion liquid for subsequent use, add bentonite subsequently, be uniformly mixed 2-3h, stir and after terminating, mixed material is poured in evaporimeter, dry process in 70-80 DEG C of environment, completely except desolventizing, subsequently that gains abrasive lapping is broken, obtain 100-200 order powder for subsequent use;
(2) batch mixing is carried out according to the material taking sequence of clinker of kaolin, electro-corundum sand, beryllium oxide, hydroxyapatite, graphite powder, after being uniformly mixed 40-50min, add step (1) gained material, continue to be uniformly mixed 30-40min, finally add modified water glass bonding agent and other leftover materials again, shake out after being blown into carbon dioxide solidification after being uniformly mixed and get final product.
Modified water glass bonding agent prepared by the present invention has more excellent normal temperature wet strength than the modified water glass bonding agent of routine, thixotropy and rheological characteristic better, reaction bonded activity is high, and environmental protection, waterglass consumption is less, in addition, beryllium oxide in raw material effectively can improve the thermal conductivity of molding sand, prevent foundry goods burning into sand, and the nano calcium fluoride of alta-mud load is scattered in the effect having lubrication, enhancing in sand material, and can be formed and be not stained with impervious barrier, prevent foundry goods scab, improve the surface quality of foundry goods; This composite modified water-glass sand high comprehensive performance, even intensity, casting quality is high, can meet the cast requirement of high accuracy pump valve foundry goods.
Detailed description of the invention
This embodiment water-glass sand is prepared by the raw material of following weight portion: 50 order clinker of kaolin 30,80 order electro-corundum sand 30, beryllium oxide 10, hydroxyapatite 1, graphite powder 1, modified water glass bonding agent 1.5, bentonite 2, Choline Chloride 0.1, nano calcium fluoride 0.4,50% ethanol water 8, silane coupler 0.1.
Modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 12 of 40 Baume degrees, aluminium-magnesium silicate 0.1, bacteria cellulose 2, quaternary ammonium salt ionic liquid 6; Its modification method for preparing is: first drop in quaternary ammonium salt ionic liquid by bacteria cellulose, is heated to 40 DEG C, is uniformly mixed 2h, adds other leftover materials subsequently, continues to be uniformly mixed 40min, to obtain final product.
The preparation method of this modified sodium silicate sand is:
(1) first nano calcium fluoride, silane coupler are added in ethanol water, ultrasonic agitation dispersion 40min, obtain nano calcium fluoride dispersion liquid for subsequent use, add bentonite subsequently, be uniformly mixed 2h, stir and after terminating, mixed material is poured in evaporimeter, dry process in 70 DEG C of environment, completely except desolventizing, subsequently that gains abrasive lapping is broken, obtain 100 order powders for subsequent use;
(2) batch mixing is carried out according to the material taking sequence of clinker of kaolin, electro-corundum sand, beryllium oxide, hydroxyapatite, graphite powder, after being uniformly mixed 40min, add step (1) gained material, continue to be uniformly mixed 30min, finally add modified water glass bonding agent and other leftover materials again, shake out after being blown into carbon dioxide solidification after being uniformly mixed and get final product.
The present embodiment sand conditioning become the cylindrical sample of φ 50 × 50mm to carry out the performance test results to be:
Tensile strength: 2.45MPa; Compression strength: 4.45MPa; Gas permeability: 58; Hygroscopicity≤1.2%; Retained strength (800 DEG C) 0.32MPa: reclamation rate >=85%.The bright and clean flawless of the cast(ing) surface obtained, size is accurate, and yield rate reaches more than 95%.

Claims (3)

1. the pump valve foundry goods composite modified water-glass sand of high heat conduction, it is characterized in that, this water-glass sand is prepared by the raw material of following weight portion: 50-80 order clinker of kaolin 30-40,80-120 order electro-corundum sand 30-40, beryllium oxide 10-15, hydroxyapatite 1-1.5, graphite powder 1-2, modified water glass bonding agent 1.5-2, bentonite 2-3, Choline Chloride 0.1-0.2, nano calcium fluoride 0.4-0.5,50% ethanol water 8-10, silane coupler 0.1-0.2.
2. a kind of pump valve foundry goods composite modified water-glass sand of high heat conduction as claimed in claim 1, it is characterized in that, described modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 12-15 of 40-50 Baume degrees, aluminium-magnesium silicate 0.1-0.2, bacteria cellulose 2-3, quaternary ammonium salt ionic liquid 6-8; Its modification method for preparing is: first drop in quaternary ammonium salt ionic liquid by bacteria cellulose, be heated to 40-50 DEG C, be uniformly mixed 2-3h, adds other leftover materials subsequently, continues to be uniformly mixed 40-50min, to obtain final product.
3. a kind of pump valve foundry goods preparation method of the composite modified water-glass sand of high heat conduction as claimed in claim 1, it is characterized in that, described preparation method is:
(1) first nano calcium fluoride, silane coupler are added in ethanol water, ultrasonic agitation dispersion 40-50min, obtain nano calcium fluoride dispersion liquid for subsequent use, add bentonite subsequently, be uniformly mixed 2-3h, stir and after terminating, mixed material is poured in evaporimeter, dry process in 70-80 DEG C of environment, completely except desolventizing, subsequently that gains abrasive lapping is broken, obtain 100-200 order powder for subsequent use;
(2) batch mixing is carried out according to the material taking sequence of clinker of kaolin, electro-corundum sand, beryllium oxide, hydroxyapatite, graphite powder, after being uniformly mixed 40-50min, add step (1) gained material, continue to be uniformly mixed 30-40min, finally add modified water glass bonding agent and other leftover materials again, shake out after being blown into carbon dioxide solidification after being uniformly mixed and get final product.
CN201510816162.7A 2015-11-23 2015-11-23 High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof Pending CN105414459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510816162.7A CN105414459A (en) 2015-11-23 2015-11-23 High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof

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Application Number Priority Date Filing Date Title
CN201510816162.7A CN105414459A (en) 2015-11-23 2015-11-23 High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106040959A (en) * 2016-07-29 2016-10-26 无锡市三峰仪器设备有限公司 Novel instrument casting precoated sand
CN106077423A (en) * 2016-07-29 2016-11-09 无锡市三峰仪器设备有限公司 A kind of instrument Foundry Coated Sand of anti-sintering
CN106853505A (en) * 2017-01-09 2017-06-16 河南金耐源新材料科技有限公司 The casting method that ceramic sand inorganic binder and ceramic sand are recycled
WO2020254220A1 (en) * 2019-06-17 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Additive mixture for moulding material mixtures for the production of water-glass-bonded casting moulds and casting cores

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CN101885035A (en) * 2010-06-23 2010-11-17 深圳市景鼎现代科技有限公司 Formula of water glass modifying additive and production process and using method thereof
CN103567355A (en) * 2013-10-11 2014-02-12 铜陵市经纬流体科技有限公司 Organic ester sodium silicate self-hardening sand and preparation method thereof
CN103567356A (en) * 2013-10-11 2014-02-12 铜陵市经纬流体科技有限公司 Sodium silicate sand with high wet-compressive strength 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

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CN101885035A (en) * 2010-06-23 2010-11-17 深圳市景鼎现代科技有限公司 Formula of water glass modifying additive and production process and using method thereof
CN103567355A (en) * 2013-10-11 2014-02-12 铜陵市经纬流体科技有限公司 Organic ester sodium silicate self-hardening sand and preparation method thereof
CN103567356A (en) * 2013-10-11 2014-02-12 铜陵市经纬流体科技有限公司 Sodium silicate sand with high wet-compressive strength and preparation method thereof
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106040959A (en) * 2016-07-29 2016-10-26 无锡市三峰仪器设备有限公司 Novel instrument casting precoated sand
CN106077423A (en) * 2016-07-29 2016-11-09 无锡市三峰仪器设备有限公司 A kind of instrument Foundry Coated Sand of anti-sintering
CN106853505A (en) * 2017-01-09 2017-06-16 河南金耐源新材料科技有限公司 The casting method that ceramic sand inorganic binder and ceramic sand are recycled
WO2020254220A1 (en) * 2019-06-17 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Additive mixture for moulding material mixtures for the production of water-glass-bonded casting moulds and casting cores

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