CN105414463A - Heat-shock resistant efficient composite modified sodium silicate sand for pump valve casting and preparation method thereof - Google Patents

Heat-shock resistant efficient composite modified sodium silicate sand for pump valve casting and preparation method thereof Download PDF

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CN105414463A
CN105414463A CN 201510833980 CN201510833980A CN105414463A CN 105414463 A CN105414463 A CN 105414463A CN 201510833980 CN201510833980 CN 201510833980 CN 201510833980 A CN201510833980 A CN 201510833980A CN 105414463 A CN105414463 A CN 105414463A
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sand
casting
sodium silicate
mixing
silicate
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CN 201510833980
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吴寿涛
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铜陵市经纬流体科技有限公司
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Abstract

The invention discloses heat-shock resistant efficient composite modified sodium silicate sand for a pump valve casting. Compared with a common modified sodium silicate adhesive, a modified sodium silicate adhesive in the sodium silicate sand has more excellent normal temperature wet strength and better thixotropy and rheological property and is high in reaction bonding activity and friendly to environment, the dosage is smaller, and collapsibility can be improved significantly; in addition, calcium aluminate added into raw materials can assist to purify substances such as sulfur and oxygen which are produced in the pouring process and reduce harmful influence of the substances on the casting, the heat-shock resistance of the casting sand is effectively improved through boron glass powder, and the service life of the casting sand and the precision of the casting are improved; nano-calcium fluoride loaded by bentonite is dispersed in the sand material and has the effects of lubrication and enhancement, a non-stick impervious layer can be formed, and sand burning of the casting are avoided. The composite modified sodium silicate sand is good in comprehensive performance, not prone to hydrating and metamorphosis, efficient and durable, and the pouring requirement for the high-precision pump valve casting can be met.

Description

一种泵阀铸件用抗热震高效复合改性水玻璃砂及其制备方法 The cast composite modified with high thermal shock resistance and its preparation method silicate sand valve

技术领域 FIELD

[0001]本发明涉及水玻璃砂技术领域,尤其涉及一种栗阀铸件用抗热震高效复合改性水玻璃砂及其制备方法。 [0001] The present invention relates to a technical field silicate sand, more particularly to a valve Li silicate sand casting and efficient method for preparing compound modified by thermal shock.

背景技术 Background technique

[0002]型砂主要是由砂料、粘接剂以及辅助物等根据不同的比例混合制成的一类在铸造中用来造型的材料,根据使用的粘接剂不同,可分为粘土砂、水玻璃砂、树脂砂等等,其中水玻璃砂具有强度高、成本低、工艺简单、污染小等优点,被广泛使用。 [0002] The molding sand is mainly composed of abrasive, adhesive and the like in accordance with a class of auxiliary material for molding during casting made different proportions, depending on the adhesive used, it can be divided into clay sand, silicate sand, resin sand, etc., wherein the sodium silicate sand having a high strength, low cost, simple process, low pollution, etc., are widely used.

[0003]栗、阀门铸件具有壁薄、形状复杂等特点,在铸造过程中对型砂的质量要求尤为严格,型砂的质量也是关系到铸件质量的重要因素,水玻璃型砂虽然存在显著的优点,同时也存在很多缺点,明显的缺陷主要表现在常温强度低、溃散性差、旧砂再生困难,如不对其进行改性处理,很难提高栗阀铸件的质量。 [0003] Li, valve casting having a thin wall, complex shapes, etc., an important factor during casting of the molding sand quality requirements are particularly strict, quality sand is also related to the casting mass, a significant advantage of sodium silicate bonded sand, although present, while there are many disadvantages, mainly obvious defects at low temperature strength, poor collapsibility, sand reclamation difficult, if not subjected to modification, the valve is difficult to improve the quality of castings Li.

发明内容 SUMMARY

[0004]本发明目的就是为了弥补已有技术的缺陷,提供一种栗阀铸件用抗热震高效复合改性水玻璃砂及其制备方法。 [0004] The object of the present invention is to make up for the deficiencies of the prior art, to provide efficient thermal shock composite modified silicate sand and preparation method thereof with one Li valve casting.

[0005]本发明是通过以下技术方案实现的: [0005] The present invention is achieved by the following technical solutions:

一种栗阀铸件用抗热震高效复合改性水玻璃砂,该水玻璃砂由以下重量份的原料制备得到:50-60目石英砂60-80、80-100目铝酸钙粉30-40、废弃石墨粉2-3、硼玻璃粉1-2、改性水玻璃粘接剂1.5-2、膨润土2-3、氯化胆碱0.1-0.2、纳米氟化钙0.4-0.5、50%乙醇水溶液8-10、硅烷偶联剂0.1-0.2。 Li one kind of high thermal shock valve casting with sand modified silicate compound, sodium silicate sand which was prepared by the following weight material: 50-60 mesh quartz sand 60-80,80-100 mesh calcium aluminate powder 30- 40, waste graphite 2-3, 1-2 boron glass powder, 1.5-2 modified silicate adhesive, bentonite 2-3, 0.1-0.2 choline chloride, calcium fluoride 0.4-0.5,50% nano 8-10 aqueous ethanol solution, a silane coupling agent 0.1-0.2.

[0006]所述的改性水玻璃粘接剂由以下重量份的原料制成:40-50波美度的水玻璃Κ-ΐ 5、硅酸镁铝0.1-0.2、细菌纤维素2-3、季铵盐离子液体6-8;其改性制备方法为:先将细菌纤维素投入季铵盐离子液体中,加热至40-50°C,搅拌混合2-3h,随后加入其它剩余物料,继续搅拌混合40-50min,即得。 [0006] The modified silicate of the adhesive prepared from the following raw materials by weight: 40-50 Baume water glass Κ-ΐ 5, 0.1 to 0.2 magnesium aluminum silicate, bacterial cellulose 2-3 , quaternary ammonium ionic liquids 6-8; modified preparation method thereof: bacterial cellulose into first molten salts heated to 40-50 ° C, stirred for 2-3h mixed, followed by addition of the other remaining materials, stirring was continued mixing 40-50min, to obtain.

[0007]所述的一种栗阀铸件用抗热震高效复合改性水玻璃砂的制备方法为: [0007] Li one of the valve casting method for preparing a composite high thermal shock resistance is modified silicate sand:

(1)先将纳米氟化钙、硅烷偶联剂加入乙醇水溶液中,超声搅拌分散40-50min,得纳米氟化钙分散液备用,随后加入膨润土,搅拌混合2-3h,搅拌结束后将混合物料倒入蒸发器中,在70-80°C环境中干燥处理,完全除去溶剂,随后将所得物料研磨破碎,得100-200目粉体备用; (1) First nano calcium fluoride, a silane coupling agent was added an aqueous solution of ethanol, the ultrasonic dispersion was stirred for 40-50min, to obtain dispersion of nano-calcium fluoride backup, followed by the addition of bentonite, 2-3h stirring and mixing, the mixture was stirred ends feed into the evaporator, dried at 70-80 ° C environment, the solvent was completely removed, and then crushing the resulting material triturated to give powder standby 100-200 mesh;

(2)按照石英砂、铝酸钙粉、废弃石墨粉、硼玻璃粉的取料顺序进行混料,搅拌混合40-50min后,加入步骤(1)所得物料,继续搅拌混合30_40min,最后再加入改性水玻璃粘接剂及其它剩余物料,搅拌混合均匀后吹入二氧化碳气体固化后出砂即得。 (2) in accordance with quartz sand, calcium aluminum powder, waste graphite, boron, glass frit order reclaimer mixing, stirring and mixing after 40-50min, added in step (1) the material obtained, stirring was continued for mixing 30_40min, then add modified silicate adhesive and the other remaining materials, after mixing evenly blown into the carbon dioxide gas to obtain a cured sand.

[0008]本发明制备的改性水玻璃粘接剂较之常规的改性水玻璃粘接剂具有更为优良的常温湿态强度,触变性和流变性更好,反应粘结活性高,且绿色环保,用量更少,溃散性得到极大改善;此外原料中加入的铝酸钙能辅助净化浇注过程中产生的硫、氧等物质对铸件的不良影响,硼玻璃粉有效的提高了型砂的抗热震性,提高了型砂的使用寿命和铸件的精度,而经膨润土负载的纳米氟化钙分散于砂料中有润滑、增强的功效,并可形成不沾防渗层,防止铸件粘砂;这种复合改性水玻璃砂综合性能优良,不易水化变质,高效耐用,可满足高精度栗阀铸件的浇注要求。 [0008] The modified silicate adhesive preparation of the present invention over conventional modified silicate adhesive has more excellent constant temperature and humidity state strength, better thixotropy and rheology, high reactivity binding activity, and green, less the amount, have been greatly improved collapsibility; calcium aluminate material in addition added in the secondary clarifier can adversely affect the casting process to produce sulfur, oxygen and other substances of casting, glass frit B effectively improve the sand thermal shock resistance, improve the life and precision sand casting, and nano-calcium fluoride loaded bentonite was dispersed in a sand feed lubrication, enhanced efficacy, and can form non-stick impermeable layer, to prevent the sticky sand casting ; this compound modified silicate sand excellent comprehensive performance, easy deterioration hydration, efficient and durable, high accuracy to meet the cast castings Li valve.

具体实施方式 detailed description

[0009]该实施例水玻璃砂由以下重量份的原料制备得到:50目石英砂60、80目铝酸钙粉30、废弃石墨粉2、硼玻璃粉1、改性水玻璃粘接剂1.5、膨润土2、氯化胆碱0.1、纳米氟化钙0.4、50%乙醇水溶液8、硅烷偶联剂0.1。 [0009] This Example was prepared silicate sand parts by weight or less of the feedstock: 60, 80 50 mesh silica sand 30 mesh calcium aluminate powder, graphite powder waste 2, a boron glass frit, an adhesive modified silicate 1.5 , 2 bentonite, 0.1 choline chloride, calcium fluoride nano 8 0.4,50% aqueous ethanol, 0.1 a silane coupling agent.

[0010]其中改性水玻璃粘接剂由以下重量份的原料制成:40波美度的水玻璃12、硅酸镁铝0.1、细菌纤维素2、季铵盐离子液体6;其改性制备方法为:先将细菌纤维素投入季铵盐离子液体中,加热至40°C,搅拌混合2h,随后加入其它剩余物料,继续搅拌混合40min,即得。 [0010] wherein the modified silicate adhesive is prepared from the following raw materials by weight: water glass of 40 degree Baume 12 0.1 magnesium aluminum silicate, BC 2, 6 molten salts; its modified preparation method: bacterial cellulose into first molten salts heated to 40 ° C, mixed by stirring 2h, the other remaining materials subsequently added, mixing stirring was continued for 40min, that is.

[0011]该水玻璃砂的制备方法为: [0011] The method of preparing the silicate sand as:

(1)先将纳米氟化钙、硅烷偶联剂加入乙醇水溶液中,超声搅拌分散40min,得纳米氟化钙分散液备用,随后加入膨润土,搅拌混合2h,搅拌结束后将混合物料倒入蒸发器中,在70°〇环境中干燥处理,完全除去溶剂,随后将所得物料研磨破碎,得100目粉体备用; (1) First nano calcium fluoride, a silane coupling agent was added an aqueous solution of ethanol, the ultrasonic dispersion was stirred for 40min, to obtain a dispersion of nano calcium fluoride standby, bentonite is added, followed by mixing with stirring 2h, after completion of the stirring mixture was charged into an evaporator reactor, dried at 70 ° square environment, the solvent was completely removed, and then crushing the resulting material triturated to give a powder of 100 mesh for later use;

(2)按照石英砂、铝酸钙粉、废弃石墨粉、硼玻璃粉的取料顺序进行混料,搅拌混合40min后,加入步骤(1)所得物料,继续搅拌混合30min,最后再加入改性水玻璃粘接剂及其它剩余物料,搅拌混合均匀后吹入二氧化碳气体固化后出砂即得。 (2) mixing in accordance with quartz sand, calcium aluminum powder, waste graphite powder, glass frit, boron reclaimer order, stirring after mixing 40min, added in step (1) resulting material, mixing continued stirring 30min, then add modified sodium silicate adhesive and the other remaining materials, after mixing evenly blown into the carbon dioxide gas to obtain a cured sand.

[0012]将本实施例型砂制备成Φ 50 X 50mm的圆柱形试样进行性能测试结果为: [0012] The present embodiment sand prepared Φ 50 X 50mm cylindrical specimens in a performance test results:

抗拉强度:2.24MPa ;抗压强度:4.62MPa ;透气性:66 ;吸湿性< 1.5%;残留强度(800°C) Tensile strength: 2.24 MPa; Compressive strength: 4.62MPa; air permeability: 66; moisture <1.5%; residual strength (800 ° C)

0.26MPa:回用率2 85%。 0.26MPa: recycling rate of 285%. 得到的铸件尺寸精度稳定,成品率达到95%以上。 The resulting casting dimensional accuracy and stability, yield of 95%.

Claims (3)

  1. 1.一种栗阀铸件用抗热震高效复合改性水玻璃砂,其特征在于,该水玻璃砂由以下重量份的原料制备得到:50-60目石英砂60-80、80_100目招酸|丐粉30-40、废弃石墨粉2_3、硼玻璃粉1-2、改性水玻璃粘接剂1.5-2、膨润土2-3、氯化胆碱0.1-0.2、纳米氟化钙0.4-0.5、50%乙醇水溶液8-10、硅烷偶联剂0.1-0.2。 A Li valve casting, characterized in that the composite with high thermal shock modified silicate sand, silicate sand which was prepared by the following weight material: 50-60 mesh quartz sand 60-80,80_100 mesh strokes acid | cai powder 30-40, 2_3 waste graphite, boron, glass frit 1-2, 1.5-2 modified silicate adhesive, bentonite 2-3, 0.1-0.2 choline chloride, calcium fluoride nano 0.4-0.5 , 50% aqueous ethanol 8-10, a silane coupling agent 0.1-0.2.
  2. 2.如权利要求1所述的一种栗阀铸件用抗热震高效复合改性水玻璃砂,其特征在于,所述的改性水玻璃粘接剂由以下重量份的原料制成:40-50波美度的水玻璃12-15、硅酸镁铝0.1-0.2、细菌纤维素2-3、季铵盐离子液体6-8 ;其改性制备方法为:先将细菌纤维素投入季钱盐离子液体中,加热至40-50°C,搅拌混合2-3h,随后加入其它剩余物料,继续搅拌混合40_50min,即得。 2. An Li cast valve according to claim 1 with high thermal shock composite modified silicate sand, wherein said modified sodium silicate adhesive is prepared from the following raw materials by weight: 40 -50 12-15 Baume sodium silicate, magnesium aluminum silicate 0.1-0.2, bacterial cellulose 2-3, 6-8 quaternary ammonium ionic liquid; the preparation method is modified: first input quaternary bacterial cellulose money ionic liquid, heated to 40-50 ° C, stirring and mixing 2-3h, the other remaining materials subsequently added, mixing continued stirring 40_50min, i.e., too.
  3. 3.如权利要求1所述的一种栗阀铸件用抗热震高效复合改性水玻璃砂的制备方法,其特征在于,所述的制备方法为: (1)先将纳米氟化钙、硅烷偶联剂加入乙醇水溶液中,超声搅拌分散40-50min,得纳米氟化钙分散液备用,随后加入膨润土,搅拌混合2-3h,搅拌结束后将混合物料倒入蒸发器中,在70-80°C环境中干燥处理,完全除去溶剂,随后将所得物料研磨破碎,得100-200目粉体备用; (2)按照石英砂、铝酸钙粉、废弃石墨粉、硼玻璃粉的取料顺序进行混料,搅拌混合40-50min后,加入步骤(1)所得物料,继续搅拌混合30_40min,最后再加入改性水玻璃粘接剂及其它剩余物料,搅拌混合均匀后吹入二氧化碳气体固化后出砂即得。 3. An Li cast valve 1 according to preparation method efficient thermal shock modified silicate sand compound as claimed in claim, wherein the preparation process is: Ca (1) First fluorinated nanometers, the silane coupling agent was added an aqueous solution of ethanol, the ultrasonic dispersion was stirred for 40-50min, to obtain dispersion of nano-calcium fluoride standby, bentonite is added, followed by stirring and mixing 2-3h, after completion of the stirring mixture was charged into an evaporator at 70 80 ° C environment, the drying process, the solvent was completely removed, and then crushing the resulting material triturated to give powder of 100-200 mesh standby; (2) according to quartz sand, calcium aluminum powder, waste graphite, boron, glass frit reclaiming after sequential mixing, stirring and mixing after 40-50min, added in step (1) the material obtained, stirring was continued for mixing 30_40min, then add modified silicate adhesive and the other remaining materials, mixing evenly after blowing carbon dioxide gas cured sand that was.
CN 201510833980 2015-11-25 2015-11-25 Heat-shock resistant efficient composite modified sodium silicate sand for pump valve casting and preparation method thereof CN105414463A (en)

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