CN105414461A - High-permeability compact composite modified sodium silicate-bonded sand for pump valve castings and preparation method of high-permeability compact composite modified sodium silicate-bonded sand - Google Patents

High-permeability compact composite modified sodium silicate-bonded sand for pump valve castings and preparation method of high-permeability compact composite modified sodium silicate-bonded sand Download PDF

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Publication number
CN105414461A
CN105414461A CN201510833818.6A CN201510833818A CN105414461A CN 105414461 A CN105414461 A CN 105414461A CN 201510833818 A CN201510833818 A CN 201510833818A CN 105414461 A CN105414461 A CN 105414461A
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China
Prior art keywords
sand
sodium silicate
composite modified
modified sodium
uniformly mixed
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Pending
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CN201510833818.6A
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Chinese (zh)
Inventor
吴寿涛
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TONGLING JINGWEI FLUID TECHNOLOGY Co Ltd
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TONGLING JINGWEI FLUID TECHNOLOGY Co Ltd
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Priority to CN201510833818.6A priority Critical patent/CN105414461A/en
Publication of CN105414461A publication Critical patent/CN105414461A/en
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Abstract

The invention discloses high-permeability compact composite modified sodium silicate-bonded sand for pump valve castings. Compared with a conventional modified sodium silicate adhesive, a modified sodium silicate adhesive in the sodium silicate-bonded sand is more excellent in normal-temperature wet strength, the thixotropy and rheological property are better, and the reaction binding activity is high; in addition, environmental friendliness is achieved, and the use amount is smaller; furthermore, cordierite, nano-zirconia and the like in raw materials have the advantages of being low in coefficient of thermal expansion, good in chemical stability and the like, and accordingly the dimension stability and the structural compactness of the molding sand can be improved; meanwhile, the good permeability is achieved, nano calcium fluoride carried by bentonite is dispersed in the sand, the lubricating effect and the reinforcing effect are achieved, and a non-stick impermeable layer can be formed, so that the sand is prevented from adhering to the castings. The composite modified sodium silicate-bonded sand is excellent in comprehensive performance, not prone to absorbing moisture, high in strength, good in heat stability, high in casting accuracy and fast to scatter and clean, and casting requirements of high-accuracy pump valve castings can be met.

Description

Ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height and preparation method thereof
Technical field
The present invention relates to water-glass sand technical field, particularly relate to ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height 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 ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height and preparation method thereof.
The present invention is achieved by the following technical solutions:
The ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height, this water-glass sand is prepared by the raw material of following weight portion: 40-50 order bauxite sand 40-50,80-100 order cordierite powder 30-40, nano zircite 3-5,60-80 order mullite powder 10-12, calcium alginate 0.4-0.5, modified water glass bonding agent 1.5-2, graphite powder 1-2, 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 the described ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height 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 bauxite sand, cordierite powder, mullite powder, nano zircite, 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, and better, reaction bonded activity is high for thixotropy and rheological characteristic, and environmental protection, consumption is less; In addition, the material thermal expansion coefficients such as the cordierite in raw material, nano zircite are low, good chemical stability, dimensional stability and the structure degree of packing of molding sand can be improved, possesses good gas permeability simultaneously, and be scattered in through the nano calcium fluoride of alta-mud load the effect having lubrication, enhancing in sand material, and can be formed and be not stained with impervious barrier, prevent foundry goods scab; This composite modified water-glass sand high comprehensive performance, not easily moisture absorption, intensity is high, Heat stability is good, and cast precision is high, and defeated and dispersed cleaning is fast, can meet the cast requirement of high accuracy pump valve foundry goods.
Detailed description of the invention
The water-glass sand of this embodiment is prepared by the raw material of following weight portion: 40 order bauxite sand 40,80 order cordierite powder 30, nano zircite 3,60 order mullite powder 10, calcium alginate 0.4, modified water glass bonding agent 1.5, graphite powder 1, bentonite 2, Choline Chloride 0.1, nano calcium fluoride 0.4,50% ethanol water 8, silane coupler 0.1.
Wherein 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 embodiment water-glass 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 bauxite sand, cordierite powder, mullite powder, nano zircite, 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: 2.58Pa; Compression strength: 4.67MPa; Gas permeability: 75; Hygroscopicity≤1.0%; Retained strength (800 DEG C) 0.28MPa: reclamation rate >=85%.The bright and clean densification of the foundry goods obtained, yield rate reaches more than 95%.

Claims (3)

1. the ventilative composite modified water-glass sand of consolidation of pump valve foundry goods height, it is characterized in that, this water-glass sand is prepared by the raw material of following weight portion: 40-50 order bauxite sand 40-50,80-100 order cordierite powder 30-40, nano zircite 3-5,60-80 order mullite powder 10-12, calcium alginate 0.4-0.5, modified water glass bonding agent 1.5-2, graphite powder 1-2, 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. the ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height 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. the preparation method of the ventilative composite modified water-glass sand of consolidation of a kind of pump valve foundry goods height 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 bauxite sand, cordierite powder, mullite powder, nano zircite, 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.
CN201510833818.6A 2015-11-25 2015-11-25 High-permeability compact composite modified sodium silicate-bonded sand for pump valve castings and preparation method of high-permeability compact composite modified sodium silicate-bonded sand Pending CN105414461A (en)

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Cited By (10)

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CN105964887A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 High-breathability moulding sand using thermoplastic oxidized-starch modified gelatin as adhesive and preparation method thereof
CN105964886A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Novel environment-friendly molding sand adopting carbon nano tube modified animal glue as adhesive and preparation method thereof
CN105964882A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Environment-friendly molding sand adopting cellulose sulfate modified animal glue as adhesive and preparation method thereof
CN105964889A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof
CN105964892A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Light environment-friendly molding sand adopting nano titanium modified animal glue as adhesive and preparation method thereof
CN105964888A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Novel environmentally-friendly moulding sand using cotton pulp dreg modified gelatin as adhesive and preparation method thereof
CN106001393A (en) * 2016-06-22 2016-10-12 马鞍山市创诚铸造有限公司 Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand
CN106077437A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of highly-breathable molding sand using nano-silicon modified animal glue as bonding agent and preparation method thereof
CN106077438A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of novel environment friendly molding sand using nano zircite modified animal glue as bonding agent and preparation method thereof
CN106077440A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of environmental protection molding sand using polyether sulfone super fine modified animal glue as bonding agent and preparation method thereof

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105964887A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 High-breathability moulding sand using thermoplastic oxidized-starch modified gelatin as adhesive and preparation method thereof
CN105964886A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Novel environment-friendly molding sand adopting carbon nano tube modified animal glue as adhesive and preparation method thereof
CN105964882A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Environment-friendly molding sand adopting cellulose sulfate modified animal glue as adhesive and preparation method thereof
CN105964889A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Environmentally-friendly moulding sand using lithium-based bentonite modified gelatin as adhesive and preparation method thereof
CN105964892A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Light environment-friendly molding sand adopting nano titanium modified animal glue as adhesive and preparation method thereof
CN105964888A (en) * 2016-06-22 2016-09-28 马鞍山市创诚铸造有限公司 Novel environmentally-friendly moulding sand using cotton pulp dreg modified gelatin as adhesive and preparation method thereof
CN106001393A (en) * 2016-06-22 2016-10-12 马鞍山市创诚铸造有限公司 Environment-friendly foundry sand serving as binder and formed by modifying animal glue through chitosan and preparation method of environment-friendly foundry sand
CN106077437A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of highly-breathable molding sand using nano-silicon modified animal glue as bonding agent and preparation method thereof
CN106077438A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of novel environment friendly molding sand using nano zircite modified animal glue as bonding agent and preparation method thereof
CN106077440A (en) * 2016-06-22 2016-11-09 马鞍山市创诚铸造有限公司 A kind of environmental protection molding sand using polyether sulfone super fine modified animal glue as bonding agent and preparation method thereof

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Application publication date: 20160323