锆英砂简介
锆英砂是一种次要由火成岩构成时从岩浆中结晶进去的锆、硅和氧组成的矿物。锆英砂也产于岩脉和蜕变岩中。锆英砂属四方晶系，常呈发育良好的锥状小四方柱体，也成不规定粒状，性脆，断口贝壳状。锆英砂多与钛铁矿、金红石、独居石、磷钇矿等共生于海滨砂中，经水选、电选、磁选等选矿工艺分选后而失去。锆英砂实践组成为：ZrO2:67.1%；SiO2:32.9%。,以及大批的Fe2O3、CaO、Al2O3等杂质，实践上纯锆英砂含有67.23% ZrO2和32.77% SiO2。
锆英砂特点
1、锆英砂热收缩系数小，功能可与宝珠砂媲美，用其配制型砂，铸件不会产生收缩缺点。
2、锆英砂外表润滑，构造致密，使得粘结剂能平均笼罩。
3、锆英砂耐火度高，易溃散。
4、锆英砂热导率大，稳固性好，不龟裂。
锆英砂参数
名目 | ZrO2(%) | SiO2(%) | AL2O3%(%) | TiO2(%) | Fe2O3%(%) | 细度 |
65# | 65.52 | 33.04 | 0.81 | 0.39 | 0.10 | 80-160目 |
63# | 63.20 | 31.52 | 1.1 | 1.41 | 0.27 |
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锆英砂用处
锆英砂用于耐火资料（称锆质耐火资料，如锆刚玉砖，锆质耐火纤维），铸造行业铸型用砂（精细铸件型砂），精细搪瓷用具，此外锆英砂也用于玻璃、金属（海绵锆）以及锆化合物（二氧化锆、氯氧化锆、锆酸钠、氟锆酸钾、硫酸锆等）的消费中。适于隐没模、履膜砂、水玻璃砂、树脂砂、精细铸造及铜、铝件的抛光清算。
锆英砂可制造玻璃窑的锆英石砖，盛钢桶用锆英石砖、捣打料和浇注料；增加到其它资料中可改善其功能，如分解堇青石中增加锆英砂，可拓宽堇青石的烧结范畴，而又不影响其热震稳固性；在高铝砖中增加锆英砂，制作抗剥落高铝砖，热震稳固性大大进步；还可用于提取ZrO2
Introduction of zircon sandZircon sand is a kind of is mainly composed of igneous rocks formed from magma crystallization from a mineral composed of zirconium, silicon and oxygen.Zircon sand is produced in dike and metamorphic rock.Zircon sand tetragonal crystal system, and are often well developed the small square cylinder, cone and into irregular granular, crisp, conchoidal fracture.Zircon sand and ilmenite, rutile, monazite and yttrium phosphate ore were in beach sand, the water concentration, electric separation, magnetic separation beneficiation process after sorting and etc.Theory of zircon sand composition is: ZrO2:67.1%;SiO2:32.9%., as well as small amounts of impurities such as Fe2O3, CaO, Al2O3, theoretically pure zircon sand containing 67.23% ZrO2 and 32.77% SiO2.Characteristics of zircon sand1, zircon sand, small thermal expansion coefficient, performance can be comparable to miss glistening sand, prepared with the sand and casting will not produce inflation defects.2, zircon sand surface is smooth, dense structure, makes the binder can uniformly covered.3, zircon sand, high refractoriness, easily defeated.4, zircon sand thermal conductivity, good stability, no crack.Zircon sand purposesZircon sand used for refractory material (called zircon refractory materials, such as zirconium corundum brick, zircon refractory fiber), the mould with sand in foundry industry, precision casting sand), precision enamelware, in addition of zircon sand used in glass, metal (zirconium sponge and zirconium compound (zirconium dioxide, zirconium oxychloride and zirconium sodium, potassium fluoride zirconate, zirconium sulfate, etc.) of production.Suitable for mold, shoe sand, sodium silicate sand, resin sand, precision casting and copper, aluminum polishing cleaning.Zircon sand to make glass kiln zircon brick, ladle with zircon brick, ramming material and castable;Added to the other materials can improve its performance, such as synthetic cordierite add zircon sand, can broaden the range of sintered cordierite, without affecting the thermal shock resistance;Zircon sand is added in the high alumina brick, making spalling high alumina brick, thermal shock stability is greatly improved;Can also be used for extraction of ZrO2.
