CN105108042A - High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof - Google Patents

High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof Download PDF

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Publication number
CN105108042A
CN105108042A CN201510487336.XA CN201510487336A CN105108042A CN 105108042 A CN105108042 A CN 105108042A CN 201510487336 A CN201510487336 A CN 201510487336A CN 105108042 A CN105108042 A CN 105108042A
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sand
water glass
heat conduction
casting
steel
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CN201510487336.XA
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陈传松
陈小乐
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陈传松
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Priority to CN201510487336.XA priority Critical patent/CN105108042A/en
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Abstract

The invention discloses high-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings. Used sand, river sand, quartz sand, baryta powder and the like with different grain diameters and different proportions are selected as sand materials for preparing the composite sand. The composite sand is good in air permeability and easy to form; nano-sized boron nitride is added so that the strength and capacity of heat conduction can be greatly improved; in the casting process, the molding sand is quick in heat conduction and heat dissipation and not likely to adhere to a metal surface, and demolding is easy; compared with traditional water glass adhesives, modified water glass adhesives have higher strength and collapsibility, the utilization rate is higher, and the quality of the castings is obviously improved.

Description

A kind of steel-casting modification Compound Water glass sand of the easy demoulding of high heat conduction and preparation method thereof
Technical field
The present invention relates to cast steel molding sand manufacturing technology field, particularly relate to modification Compound Water glass sand of the easy demoulding of the high heat conduction of a kind of steel-casting and preparation method thereof.
Background technology
The quality of foundry goods is directly connected in the quality of the casting process Sand of steel part, molding sand is mainly mixed according to different ratios by Modeling Materials such as sand material, bonding agent and adminiclies, bonding agent is wherein the important Modeling Material of a class, the height of its comprehensive quality is directly connected to surface quality and the inherent quality of foundry goods, and current the most widely used bonding agent is mainly the inorganic adhesive of representative with water-glass sand and take furane resins as the resin adhesive of representative.
Use waterglass as the molding sand of bonding agent, there is the advantages such as equipment is simple, easy to operate, nonpoisonous and tasteless, cost is lower, but also there is a lot of shortcoming in it, obvious defect is mainly manifested in that intensity is low, collapsibility is poor, recycling is difficult, govern the application of water-glass sand, therefore a kind of efficient, low toxicity of necessary development, effectively improve the modified sodium silicate sand of casting quality, to adapt to industry demand, improve casting quality.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides modification Compound Water glass sand of the easy demoulding of the high heat conduction of a kind of steel-casting and preparation method thereof.
The present invention is achieved by the following technical solutions:
A steel-casting modification Compound Water glass sand for the easy demoulding of high heat conduction, this complex sand is prepared by the raw material of following weight portion: light calcined magnesia 4-6,80-100 order river sand 18-20,60-80 order quartz sand 25-30,100-150 order blanc fixe 8-10,60-80 order old sand 30-40, nm-class boron nitride 1-2, modified water glass bonding agent 2-3, neopelex 0.1-0.2, water 12-15.
Described modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 15-20 of 55-60 Baume degrees, mesoporous nano-alumina 2-3, aluminium-magnesium silicate 0.2-0.3, carboxymethyl cellulose 0.2-0.3, solid content are Ludox 4-5, lithium tetraborate 0.1-0.2, methenamine 0.01-0.02, glucose 1-2, the barium molybdate 0.1-0.2 of 20-25%; Its preparation method is: first drop in Ludox by mesoporous nano-alumina, the ultrasonic mesoporous nano-alumina that makes is dispersed in the solution, add waterglass more subsequently, continue dispersed with stirring 20-30min, mixed solution is heated to 50-60 DEG C, add other leftover materials one by one, be uniformly mixed 80-100min, to obtain final product.
Described a kind of steel-casting preparation method of the modification Compound Water glass sand of the easy demoulding of high heat conduction, described preparation method is: be first dissolved in the water by neopelex, nm-class boron nitride is dropped in solution, ultrasonicly it is made to be uniformly dispersed, then old sand, river sand, quartz sand, blanc fixe is progressively added, be uniformly mixed heated-air drying after 30-40min, remove moisture completely, other leftover materials are added after cooling, continue to be uniformly mixed 4-5min, shake out after being blown into carbon dioxide solidification and get final product.
Advantage of the present invention is: select the old sand of different-grain diameter, different ratio, river sand, quartz sand, blanc fixe etc. as sand material, there is good gas permeability, be easy to shaping, the nm-class boron nitride added can improve intensity and capacity of heat transmission greatly, and during casting, this molding sand heat conduction and heat radiation is fast, not easily bonded metal surface, be easy to the demoulding, and the more traditional waterglass bonding agent of the waterglass bonding agent of modification has higher intensity and collapsibility, utilization rate is higher, and casting quality is improved significantly.
Detailed description of the invention
A steel-casting modification Compound Water glass sand for the easy demoulding of high heat conduction, it is prepared by the raw material of following weight portion: light calcined magnesia 5,80 order river sand 20,60 order quartz sand 28,150 order blanc fixe 10,80 order old sand 35, nm-class boron nitride 1.5, modified water glass bonding agent 3, neopelex 0.1, water 14.
Described modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 16 of 55 Baume degrees, mesoporous nano-alumina 2.5, aluminium-magnesium silicate 0.3, carboxymethyl cellulose 0.3, solid content are Ludox 5, lithium tetraborate 0.1, methenamine 0.02, glucose 1.5, the barium molybdate 0.1 of 20%; Its preparation method is: first drop in Ludox by mesoporous nano-alumina, the ultrasonic mesoporous nano-alumina that makes is dispersed in the solution, add waterglass more subsequently, continue dispersed with stirring 20min, mixed solution is heated to 50-60 DEG C, add other leftover materials one by one, be uniformly mixed 80min, to obtain final product.
Described modified sodium silicate sand preparation method is: be first dissolved in the water by neopelex, nm-class boron nitride is dropped in solution, ultrasonicly it is made to be uniformly dispersed, then old sand, river sand, quartz sand, blanc fixe is progressively added, be uniformly mixed heated-air drying after 35min, remove moisture completely, after cooling, add other leftover materials, continue to be uniformly mixed 4min, shake out after being blown into carbon dioxide solidification and get final product.
The performance test results of the molding sand that the present embodiment prepares is:
Green compression strength: 0.16MPa; Air penetrability: 89%; Wet anti-intensity: the 425KPa of heat; Shatter index: 91%.The cast(ing) surface obtained is bright and clean, and the very little flawless of pore, yield rate reaches more than 90%.

Claims (3)

1. the steel-casting modification Compound Water glass sand of the easy demoulding of high heat conduction, it is characterized in that, this complex sand is prepared by the raw material of following weight portion: light calcined magnesia 4-6,80-100 order river sand 18-20,60-80 order quartz sand 25-30,100-150 order blanc fixe 8-10,60-80 order old sand 30-40, nm-class boron nitride 1-2, modified water glass bonding agent 2-3, neopelex 0.1-0.2, water 12-15.
2. a kind of steel-casting as claimed in claim 1 modification Compound Water glass sand of the easy demoulding of high heat conduction, it is characterized in that, described modified water glass bonding agent is made up of the raw material of following weight portion: the waterglass 15-20 of 55-60 Baume degrees, mesoporous nano-alumina 2-3, aluminium-magnesium silicate 0.2-0.3, carboxymethyl cellulose 0.2-0.3, solid content are Ludox 4-5, lithium tetraborate 0.1-0.2, methenamine 0.01-0.02, glucose 1-2, the barium molybdate 0.1-0.2 of 20-25%; Its preparation method is: first drop in Ludox by mesoporous nano-alumina, the ultrasonic mesoporous nano-alumina that makes is dispersed in the solution, add waterglass more subsequently, continue dispersed with stirring 20-30min, mixed solution is heated to 50-60 DEG C, add other leftover materials one by one, be uniformly mixed 80-100min, to obtain final product.
3. a kind of steel-casting as claimed in claim 1 preparation method of the modification Compound Water glass sand of the easy demoulding of high heat conduction, it is characterized in that, described preparation method is: be first dissolved in the water by neopelex, nm-class boron nitride is dropped in solution, ultrasonicly it is made to be uniformly dispersed, then old sand, river sand, quartz sand, blanc fixe is progressively added, be uniformly mixed heated-air drying after 30-40min, remove moisture completely, other leftover materials are added after cooling, continue to be uniformly mixed 4-5min, shake out after being blown into carbon dioxide solidification and get final product.
CN201510487336.XA 2015-08-11 2015-08-11 High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof Pending CN105108042A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1238249A (en) * 1999-05-26 1999-12-15 沈阳市铸造材料研究所 Modified water glass for casting and its preparing process
CN102366812A (en) * 2011-10-11 2012-03-07 许立新 Preparation method for sodium silicate sand used for casting
CN103056285A (en) * 2013-01-29 2013-04-24 东华大学 Sodium silicate silica sand anti-sticking additive for cast steel and application method of additive
CN103495693A (en) * 2013-10-16 2014-01-08 合肥市田源精铸有限公司 High-temperature-resisting easy collapse molding 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
CN104470652A (en) * 2012-04-26 2015-03-25 Ask化学品股份有限公司 Method for producing moulds and cores for metal casting and moulds and cores produced according to this method
CN104736270A (en) * 2012-10-19 2015-06-24 Ask化学品股份有限公司 Mould material mixtures on the basis of inorganic binders, and method for producing moulds and cores for metal casting

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1238249A (en) * 1999-05-26 1999-12-15 沈阳市铸造材料研究所 Modified water glass for casting and its preparing process
CN102366812A (en) * 2011-10-11 2012-03-07 许立新 Preparation method for sodium silicate sand used for casting
CN104470652A (en) * 2012-04-26 2015-03-25 Ask化学品股份有限公司 Method for producing moulds and cores for metal casting and moulds and cores produced according to this method
CN104736270A (en) * 2012-10-19 2015-06-24 Ask化学品股份有限公司 Mould material mixtures on the basis of inorganic binders, and method for producing moulds and cores for metal casting
CN103056285A (en) * 2013-01-29 2013-04-24 东华大学 Sodium silicate silica sand anti-sticking additive for cast steel and application method of additive
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
CN103495693A (en) * 2013-10-16 2014-01-08 合肥市田源精铸有限公司 High-temperature-resisting easy collapse molding sand and preparation method thereof

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