宝珠砂又名电熔陶粒，是石英砂的高级替代品。采用山西优质铝矾土为原料，经煅烧、电熔、造粒、分筛等工艺制成。宝珠砂为球形颗粒，主要成分是氧化铝（Al2O3），成分稳定，不易产生化学变化，它的耐火度可达1900。宝珠砂颗粒圆整且表面存在许多微观孔洞，增强了水玻璃在砂粒表面的成膜能力，提高了酯硬化水玻璃自硬砂常温强度，宝珠砂在酯硬化水玻璃自硬砂中400加热机械干法的再生脱模率相比机械干法提高7。这些为宝珠砂在大型铸钢件生产中的应用提供了指导和参考。实践证明，采用宝珠砂可明显减少机械和化学粘砂，大大减少清砂的劳动强度，集中了耐火度高、流动性好、透气性强等诸多优点，完全解决了夹砂、气孔、结疤、鼠尾等铸造缺陷。

      1、耐火度；成分稳定，不易产生化学变化，它的耐火度可达1900。

      2、流动性；为球形颗粒，其流动性非常好，造型时易紧实，且能保持良好的透气性。

      3、透气性；型砂的透气性主要取决于砂粒的大小、粒度分布、粒型和粘结剂种类等因素。

      4、热膨胀系数；宝珠砂的热膨胀系数极小，热膨胀率：0.13（1000加热10分钟）。在浇注过程中几乎没有膨胀现象，大大提高了铸件的精度，其性能可与锆英砂媲美。

      5、角形系数；球形宝珠砂具有 的角形系数，因而型砂集中、紧实度高，节省了型砂成本60以上。

      6、回用性能；降低废砂数量，增加有效回用砂的数量，从而大大降低了型砂的损耗量。

      1、宝珠砂广泛应用于树脂砂（ 树脂、酚醛树脂），水玻璃砂（有机脂、CO2硬化），覆膜砂。

      2、适于各种金属铸件如：碳钢、合金钢（高锰钢、高铬铸铁），铸铁、铸铜等。

      3、宝珠砂是一种非石英质型人造砂，适用于各种铸造方式如：V法，VRH，消失模，熔模，一般砂型（粘土砂、水玻璃+CO2硬化）、树脂砂等。

      4、适用于各种粘结剂、各种金属材料的铸件生产，不但能大幅度提高铸件质量，而且清砂容易，配砂工艺简单方便（大型铸钢厂单件小批量局部用砂，少量用砂人工混制即可），对大多数铸件可以省去涂料，尤其适宜制作质量要求高的铸件。宝珠砂在铸造行业的应用日显重要，而且其在铸造行业有着不可限量的发展空间。

      5、宝珠砂适用于消失模、覆膜砂、水玻璃砂、树脂砂、精密铸造机铜、铝铸件的抛光清理，而且成本相当廉价。

Treasure sand is introduced
Treasure sand and fused ceramsite, is a senior substitute for quartz sand.Shanxi bauxite as raw material, high quality after calcining, fused,, screening and granulation process.Treasure sand for spherical particle, the main ingredient is alumina (Al2O3), composition is stable, not easy to produce chemical changes, it can reach 1900 refractoriness.Treasure sand particles roundness and the surface is bright and there is a lot of micro holes, enhanced the sodium silicate on the surface of the sand, film forming ability, improve the ester hardening sodium silicate self-hardening sand at room temperature strength, orb sand in ester hardening sodium silicate self-hardening sand 400 heating machinery dry regeneration stripping rate than dry increased by 7.These orbs sand in the application of large steel castings production provides a guidance and reference.Practice has proved that the orb sand can significantly reduce the mechanical and chemical adhering sand, greatly reduce the labor intensity of deoxidization, focused high refractoriness, good liquidity, permeability is strong, and many other advantages, completely solve the sand inclusion, porosity, scarring, casting defects such as rat tail.
Treasure sand purposes
1, orb sand are widely used in the resin sand, furan resin, phenolic resin), sodium silicate sand (organic fat, CO2 hardening), coated sand.
2, suitable for all kinds of metal casting such as: carbon steel, alloy steel, high manganese steel, high chromium cast iron), cast iron, cast copper, etc.
3, orb is a kind of quartz sand quality type artificial sand, applicable to all kinds of casting methods such as: V method, VRH, mold, casting, general sand mold (hardening of the clay sand, sodium silicate + CO2), resin sand and so on.
4, suitable for all kinds of adhesive, all kinds of metal materials of casting production, not only can greatly improve the quality of castings, easy and deoxidization, with sand process easy and convenient (local with sand sheet small batch, the large cast steel plant) with little or no artificial mixing with sand, can save the most casting coating, especially suitable for producing high quality castings.Orb application of sand in foundry industry more and more important, and its in the casting industry has a significant potential space for development.
5, orb sand is suitable for the mold, coated sand, sodium silicate sand, resin sand, precision casting machine polishing cleaning, copper, aluminum castings and the cost is cheap.

    单位名称：登封市卢店镇星光磨料磨具厂

    单位地址：河南省郑州市登封市卢店镇张家门村

    联  系 人：白经理

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    Q       Q：3050909722

    邮      箱：3050909722@qq.com

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