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1. 发明专利

JPS54146298A Production of alumina granules and autoclave unit therefor 失效
标题翻译：氧化铝颗粒的生产和自动化单元
公开(公告)号：JPS54146298A
公开(公告)日：1979-11-15
申请号：JP5477378
申请日：1978-05-09
申请人： Toyota Motor Corp
发明人： TORII GOUZOU , KOMIYAMA YOSHIROU , NODA FUMIYOSHI , MURACHI MIKIO , TAKEDA TETSUO , TAKANO GOROU , KASAHARA TAKASHI
IPC分类号： B01J3/04 , C01F7/02
摘要： PURPOSE: To efficiently remove Na
2 O and facilitate supply and taking-out of granules by granulating Al
2 O
3 powder obtd. by dehydrating Al(OH)
3 at a high temp.; allowing the granules to stand in the air to partially hydrate them; and carrying out hydration in a vertical type autoclave.
CONSTITUTION: Al(OH)
3 of about 40 μ in average diameter produced by Bayer process is rapidly dried in a hot gas to form Al
2 O
3 powder. This powder is pulverized to about 6 μ in average diameter and granulated with water sprayed. The granules are allowed to stand in the air, a heated atmosphere or a satd. steam atmosphere to be partially hydrated. The Al
2 O
3 granules are then charged into conically-bottomed container 14 of the vertical type autoclave from supply inlet 17 and heated to 130°C with steam introduced from hole 23. Hot water of 130°C is added from water supply inlet 19 through diffusion plate 15, enters washing water vessel 21 through net part 14' at the bottom of container 14, overflows, and drains from drain hole 22. Thereafter, cooling water is sprayed from introduction hole 20 to cool the granules, which are then taken out of container 14 through outlet 18 together with water.
COPYRIGHT: (C)1979,JPO&Japio
摘要翻译：目的：有效去除Na2O，促进颗粒化Al2O3粉末的供应和排出。通过在高温下脱水Al（OH）3。允许颗粒静置在空气中以部分水合它们; 并在立式高压釜中进行水化。构成：通过拜耳法生产的平均直径约40μm的Al（OH）3在热气中快速干燥以形成Al 2 O 3粉末。将粉末粉碎至平均直径约6μm，并用水喷雾造粒。将颗粒置于空气中，加热的气氛或卫生间。蒸汽气氛要部分水合。然后将Al2O3颗粒从供应入口17装入垂直型高压釜的锥形容器14中，并从孔23引入蒸汽加热至130℃。将130℃的热水从供水入口19通过扩散板15通过容器14底部的网部14'进入洗涤水容器21，溢出并从排水孔22排出。之后，从引入孔20喷射冷却水，冷却颗粒，然后将其取出容器14与水一起通过出口18。

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