CN105436395A - High-bonding-strength modified water glass sand for pump valve casting and manufacturing method of high-bonding-strength modified water glass sand - Google Patents
High-bonding-strength modified water glass sand for pump valve casting and manufacturing method of high-bonding-strength modified water glass sand Download PDFInfo
- Publication number
- CN105436395A CN105436395A CN201510833979.5A CN201510833979A CN105436395A CN 105436395 A CN105436395 A CN 105436395A CN 201510833979 A CN201510833979 A CN 201510833979A CN 105436395 A CN105436395 A CN 105436395A
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- Prior art keywords
- sand
- water glass
- modified water
- strength
- bonding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions 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
- B22C1/18—Compositions 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
- B22C1/186—Compositions 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
- B22C1/188—Alkali metal silicates
Abstract
The invention discloses high-bonding-strength modified water glass sand for a pump valve casting. A modified water glass bonding agent in the water glass sand is superior to a conventional water glass bonding agent in normal-temperature and normal-humidity strength, thixotropy and the rheological property are better, reaction bonding activity is high, and environment friendliness is achieved; the modified water glass bonding agent improves the bonding strength greatly together with yttrium oxide sol, the use amount of water glass is greatly reduced, and scattering cleaning and recycling of sand are easier; in addition, permeability resistance of the surface of molding sand can be effectively improved through sericite powder added in the sand, and defects on the surface of the casting due to molten metal permeation are avoided; and nanometer calcium fluoride loaded by bentonite is scattered in sand and has the effects of lubricating and strengthening, a non-stick permeation-preventing layer can be formed, and sand clamping and sand sticking of the casting are further prevented. The composite modified water glass sand is good in comprehensive performance, and the high-quality pump valve casting can be manufactured.
Description
Technical field
The present invention relates to water-glass sand technical field, particularly relate to modified sodium silicate sand of a kind of pump valve foundry goods high-adhesive-strength 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 modified sodium silicate sand of a kind of pump valve foundry goods high-adhesive-strength and preparation method thereof.
The present invention is achieved by the following technical solutions:
A modified sodium silicate sand for pump valve foundry goods high-adhesive-strength, this water-glass sand is prepared by the raw material of following weight portion: 50-60 order quartz sand 50-60,60-80 order magnesia 30-40, graphite powder 1-2,60-80 order sericite in powder 6-8, solid content are the yittrium oxide colloidal sol 2-3 of 10-15%, modified water glass bonding agent 0.8-1, bentonite 1-2, 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 modified sodium silicate sand of described a kind of pump valve foundry goods high-adhesive-strength 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 quartz sand, magnesia, sericite in powder, 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, adhesive strength is greatly improved together with yittrium oxide colloidal sol, the consumption of waterglass significantly reduces, and defeated and dispersed cleaning, the recycling of sand material are more simple; In addition the sericite in powder added in sand material effectively can improve the permeability resistance on molding sand surface, prevent molten metal from infiltrating and cause casting surface defect, 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 burning into sand, scab further; This composite modified water-glass sand high comprehensive performance, can obtain high-quality 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: 50 order quartz sand 50,60 order magnesia 30, graphite powder 1,60 order sericite in powder 6, solid content are yittrium oxide colloidal sol 2, modified water glass bonding agent 0.8, bentonite 1, Choline Chloride 0.1, nano calcium fluoride 0.4,50% ethanol water 8, the silane coupler 0.1 of 10%.
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.
Its preparation method 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 quartz sand, magnesia, sericite in powder, 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: 2.66MPa; Compression strength: 4.85MPa; Gas permeability: 64; Hygroscopicity≤1.2%; Retained strength (800 DEG C) 0.31MPa: reclamation rate >=90%.The bright and clean densification of the foundry goods obtained, yield rate reaches more than 95%.
Claims (3)
1. the modified sodium silicate sand of a pump valve foundry goods high-adhesive-strength, it is characterized in that, this water-glass sand is prepared by the raw material of following weight portion: 50-60 order quartz sand 50-60,60-80 order magnesia 30-40, graphite powder 1-2,60-80 order sericite in powder 6-8, solid content are the yittrium oxide colloidal sol 2-3 of 10-15%, modified water glass bonding agent 0.8-1, bentonite 1-2, 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 modified sodium silicate sand of a kind of pump valve foundry goods high-adhesive-strength 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 modified sodium silicate sand of a kind of pump valve foundry goods high-adhesive-strength 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 quartz sand, magnesia, sericite in powder, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510833979.5A CN105436395A (en) | 2015-11-25 | 2015-11-25 | High-bonding-strength modified water glass sand for pump valve casting and manufacturing method of high-bonding-strength modified water glass sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510833979.5A CN105436395A (en) | 2015-11-25 | 2015-11-25 | High-bonding-strength modified water glass sand for pump valve casting and manufacturing method of high-bonding-strength modified water glass sand |
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| CN105436395A true CN105436395A (en) | 2016-03-30 |
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| CN201510833979.5A Pending CN105436395A (en) | 2015-11-25 | 2015-11-25 | High-bonding-strength modified water glass sand for pump valve casting and manufacturing method of high-bonding-strength modified water glass sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093062A (en) * | 2018-07-27 | 2018-12-28 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that nano yttrium oxide is modified |
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| JPS61255743A (en) * | 1985-05-09 | 1986-11-13 | Mitsubishi Heavy Ind Ltd | Method for neutralizing waste water of molding sand treatment |
| 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 |
| CN103586399A (en) * | 2013-10-16 | 2014-02-19 | 昌利锻造有限公司 | Molding sand capable of quick air permeation and heat dissipation 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 |
| CN104475659A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Machine modeling efficient chilling molding sand and preparation method thereof |
-
2015
- 2015-11-25 CN CN201510833979.5A patent/CN105436395A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255743A (en) * | 1985-05-09 | 1986-11-13 | Mitsubishi Heavy Ind Ltd | Method for neutralizing waste water of molding sand treatment |
| 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 |
| CN103586399A (en) * | 2013-10-16 | 2014-02-19 | 昌利锻造有限公司 | Molding sand capable of quick air permeation and heat dissipation 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 |
| CN104475659A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Machine modeling efficient chilling molding sand and preparation method thereof |
Non-Patent Citations (1)
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| 李远才等: "《铸造造型材料实用手册》", 30 June 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093062A (en) * | 2018-07-27 | 2018-12-28 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that nano yttrium oxide is modified |
| CN109093062B (en) * | 2018-07-27 | 2022-04-01 | 湖北工业大学 | Nano yttrium oxide modified phosphate binder and preparation method thereof |
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Application publication date: 20160330 |
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