Development of Manufacturing Process for High Quality Calcium Carbonate by Causticizing Process in a Kraft Pulp Mill (Part 1)

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  • Nanri Yasunori
    Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.
  • Konno Haruo
    Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.
  • Goto Hideyuki
    Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.
  • Takahashi Kazuto
    Gotsu Mill, Nippon Paper Chemicals Co., Ltd.

Bibliographic Information

Other Title
  • 高品質苛性化軽カルの開発（その1）
  • コウヒンシツ カセイカ ケイカル ノ カイハツ ソノ 1 ケイジョウ コントロール ホウホウ ノ キソ ケントウ ガン エイブン
  • -Fundamental Study on the Controlling Method of Calcium Carbonate Morphology-
  • ―形状コントロール方法の基礎検討―

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Abstract

Causticizing step is a process to convert green liquor into white liquor in kraft pulping mill, and this process also produces a precipitated calcium carbonate as a by-product. If this causticizing calcium carbonate (CCC) could be extracted from this step as paper making material, the lime-kiln operation would be shortened or stopped ; thus the consumption of fuel oil and the discharge of CO2 gas can be reduced. However, the conventional CCC has serious problem of lower brightness, higher wire abrasion and poor opacifying ability as paper filler. Then, we challenged controlling the morphology of CCC like commercial precipitated calcium carbonate (PCC) . In this paper, slaking and causticizing reactions were separated and precisely controlled, and then various shapes of CCC with high opacifying ability and little wire abrasion could be successfully obtained.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 60 (11), 1714-1726, 2006

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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