Special alkali-free high-strength fiber and preparation method thereof

The invention discloses a special alkali-free high-strength fiber, which is prepared from the following raw materials: limestone and minerals, and mineral powder specifically comprises pyrophyllite, kaolin, quick lime, wollastonite, quartz sand, fluorite and slag. The prepared glass fiber has excellent stability, mechanical strength, elasticity modulus, acid and alkali resistance and water resistance, and the glass fiber is low in processing melting temperature, high in melting speed and high in yield. In addition, the slag is waste slag, raw materials can be recycled, the cost is reduced, meanwhile, the glass fiber performance is improved, the cost performance is high, operability is high, and the method is suitable for being widely popularized in the fiber field. 本发明公开了一种特种无碱高强纤维，制备原料包括石灰石和矿物，矿粉具体为叶腊石、高岭土、生石灰、硅灰石、石英砂、萤石、矿渣，通过特定的矿粉的选择与石灰石混合后，使制备得到的玻璃纤维具有优异的稳定性、机械强度、弹性模量及耐酸碱、耐水性，而且玻璃纤维加工熔融温度低、融化速度快，成品率高。此外，矿渣为废弃炉渣，能够实现原料的重复利用，降低成本的同时提升玻纤性能，性价比高，操作性强，适合在纤维领域广泛推广。