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    • 10. 发明授权
    • Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials
    • 用于减少纤维素纤维中杂质的方法和装置,用于制造纤维增强水泥复合材料
    • US08133352B2
    • 2012-03-13
    • US09970389
    • 2001-10-02
    • Donald J. MerkleyCaidian Luo
    • Donald J. MerkleyCaidian Luo
    • D21C5/02
    • E04C5/073C04B18/241C04B28/02C04B2111/00129D21C9/02Y02W30/91Y02W30/97C04B14/02C04B14/06C04B16/04C04B18/04C04B20/002C04B20/0048C04B40/0028C04B40/006C04B40/024C04B20/02
    • A method of manufacturing high purity fiber cement grades of cellulose fibers is described. Additional washing steps, coupled with an elevated temperature, are used in the process to extensively wash the pulps and remove substantially all COD components remaining in the pulps. The pulps are counter-currently washed by diffusion and dewatering at elevated temperatures following the brown stock washer systems. During the additional washing steps, the pulps are soaked in counter-current heated water for a pre-determined time and some chemicals may be introduced to chemically break down the COD components in the pulps and to make them more soluble in the aqueous solution. The additional washing steps can be performed using existing equipment at conventional pulp mills. A formulation and a process of making fiber reinforced cement composite materials are also described using the low COD and high purity cellulose fibers. The pulps with lower COD contents have superior performance in manufacture of fiber reinforced cement composite materials. A smaller amount of the low COD and high purity fibers is needed to achieve the same reinforcement efficiency, compared to regular cellulose fibers.
    • 描述了制造高纯度纤维水泥级纤维素纤维的方法。 在该过程中使用额外的洗涤步骤以及升高的温度,以广泛地洗涤纸浆并除去残留在纸浆中的基本上所有的COD成分。 在棕色洗衣机系统之后,纸浆通过扩散和脱水在升高的温度下反向洗涤。 在额外的洗涤步骤期间,将纸浆浸泡在逆流加热的水中预定时间,并且可以引入一些化学品以化学分解纸浆中的COD成分并使其更易溶于水溶液。 额外的洗涤步骤可以使用现有的设备在常规纸浆厂进行。 还使用低COD和高纯度纤维素纤维来描述制备纤维增强水泥复合材料的制剂和方法。 具有较低COD含量的纸浆在纤维增强水泥复合材料的制造中具有优异的性能。 与常规纤维素纤维相比,需要较少量的低COD和高纯度纤维来实现相同的增强效率。