An Operating Experience of Partial Borate Autocausticizing

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  • Kogawa Tomofumi
    Technical group, Technical department, Hachinohe mill, Mitsubishi Paper Mills Limited

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  • ホウ酸塩部分自動苛性化の操業経験
  • ホウ サンエン ブブン ジドウ カセイカ ノ ソウギョウ ケイケン

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Abstract

Partial borate autocausticizing (AC) is the patented technology from U. S. Borax Inc. which partially replaces lime causticizing with borate AC. In Hachinohe mill, we conducted partial borate AC by adding borate to recovery cycle from March 2010 until March 2011.<BR>The AC level reached up to 10%. Partial borate AC made it possible to increase white liquor (WL) production without any equipment investments. The amounts of burnt lime and heavy oil required for producing every tons of WL were both decreased.<BR>The cost of WL produced by borate AC was lower than the case which purchased lime was used for WL production.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 67 (4), 384-387, 2013

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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