CN201908137U - 一种带弧形倒角沟槽的异型阴极 - Google Patents

一种带弧形倒角沟槽的异型阴极 Download PDF

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CN201908137U
CN201908137U CN2010206536861U CN201020653686U CN201908137U CN 201908137 U CN201908137 U CN 201908137U CN 2010206536861 U CN2010206536861 U CN 2010206536861U CN 201020653686 U CN201020653686 U CN 201020653686U CN 201908137 U CN201908137 U CN 201908137U
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杨溢
陈才荣
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Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
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Abstract

本实用新型公开了一种带弧形倒角沟槽的异型阴极,包括夹持有阴极钢棒的阴极炭块,阴极炭块的顶部对称两边为圆弧形倒角边,阴极炭块的顶部为凸台式顶部,并且该凸台顶的对称两边为圆弧形倒角边,设有圆弧形倒角边的阴极炭块通过炭块糊相互连接在一起,并且在两个连接在一起的阴极炭块之间形成有带弧形倒角的沟槽。本实用新型与现有技术相比,本实用新型不仅具有结构简单、制造成本低、节能环保的优点,而且还具有阻流效果好,避免了铝液流动时在沟槽的局部产生的湍流,寿命也更长,能充分发挥异型阴极电解槽节能的优点,具有广阔的使用前景。

Description

一种带弧形倒角沟槽的异型阴极
技术领域
本实用新型涉及一种带弧形倒角沟槽的异型阴极,属于铝电解槽技术领域。
背景技术
近年来,我国的铝电解技术也得到了长足的进展,在电解槽容量上已能达到甚至超过国际先进水平。但在节能降耗方面与世界先进水平却仍存在着较大的差距。目前,国内各铝厂的直流电耗徘徊在13200—13500kWh/T.Al左右,甚至有的接近14000kWh/T.Al,有相当大的潜力可挖掘。特别是在目前国内外经济环境极为严峻的情况下,对节能的要求就更加的急迫
在铝电解生产中,节能的途径比较多。但目前国内铝电解槽节能主要有两种方式:一是阻流型的异型阴极电解槽,如专利CN200710010523.4、CN200810228017.7、CN200910300282.6等,即在普通阴极炭块的上表面加工出一个或多个阴极凸台(或沟槽),形成不平整的阴极表面,以达到减缓流速、提高铝电解槽生产稳定性、从而达到节能降耗的目的。另一种则是导流型电解槽,在阴极表面开沟槽导流。目前也保留一定铝液进行生产。
目前带凸台的异型阴极使用较多,节电效果也较明显,但由于铝液高度较低,凸台与电解质层间的距离较近,凸台的腐蚀难以避免,寿命难以保证,且启动焙烧困难。而开沟槽的异型阴极,以及导流型电解槽,则便于焙烧启动,且成本较低,但由于沟槽(或导流沟)的形状未做过专门的分析,故大多采用矩形或梯形的沟槽,阻流效果并没有得到充分的发挥,所以现有技术纯在不足。
发明内容
本实用新型的目的是:提供一种结构简单、制造成本低,采用一种合理的沟槽截面形状,避免在沟槽的局部形成湍流,以获得良好的阻流效果的带弧形倒角沟槽的异型阴极,以克服现有技术的不足。
本实用新型是这样实现的:包括夹持有阴极钢棒的阴极炭块,阴极炭块的顶部对称两边为圆弧形倒角边。
阴极炭块的顶部为凸台式顶部,并且该凸台顶的对称两边为圆弧形倒角边。
设有圆弧形倒角边的阴极炭块通过炭块糊相互连接在一起,并且在两个连接在一起的阴极炭块之间形成有带弧形倒角的沟槽。
阴极炭块为无烟煤、半石墨质或石墨材料制成的阴极炭块。
阴极炭块的高度H为400~550mm,沟槽宽B为80~400mm,沟槽深D为50~250mm。
由于采用了上述技术方案,本实用新型中包括夹持有阴极钢棒的阴极炭块,阴极炭块的顶部对称两边为圆弧形倒角边,阴极炭块的顶部为凸台式顶部,并且该凸台顶的对称两边为圆弧形倒角边,圆弧形倒角边的阴极炭块通过炭块糊相互连接在一起,并且在两个连接在一起的阴极炭块之间形成有带弧形倒角的沟槽,在阴极炭块的上顶面设置的沟槽为凸圆角沟槽,在阴极炭块的上顶面设置的沟槽为凸圆角的矩形沟槽,在阴极炭块的上顶面设置的沟槽为凸台式异型阴极,通过三种不同的沟槽来避免在沟槽的局部形成湍流,以获得较好的阻流效果。本实用新型与现有技术相比,本实用新型不仅具有结构简单、制造成本低、节能环保的优点,而且还具有阻流效果好,避免了铝液流动时在沟槽的局部产生的湍流,寿命也更长,能充分发挥异型阴极电解槽节能的优点,具有广阔的使用前景。
附图说明
图1为本发明带凸圆角沟槽阴极结构示意图;
图2为本发明带凸圆角的矩形沟槽阴极结构示意图;
图3为本发明凸圆角用在凸台式异型阴极时的示意图;
图4为本发明沟槽阴极结构尺寸示意图。
附图标记说明:1-阴极钢棒,2-阴极炭块,3-碳块糊,4-沟槽,5-圆弧形倒角边。
具体实施方式
本实用新型的实施例:如图1~3所示,一种带弧形倒角沟槽的异型阴极,包括夹持有阴极钢棒1的阴极炭块2,阴极炭块2的顶部对称两边为圆弧形倒角边5,阴极炭块2的顶部为凸台式顶部,并且该凸台顶的对称两边为圆弧形倒角边5,设有圆弧形倒角边5的阴极炭块2通过炭块糊3相互连接在一起,并且在两个连接在一起的阴极炭块2之间形成有带弧形倒角的沟槽4,阴极炭块2为无烟煤、半石墨质或石墨材料制成的阴极炭块,阴极炭块2的高度H为400~550mm,沟槽宽B为80~400mm,沟槽深D为50~250mm。
如图1所示,在阴极炭块2的上顶面设置的沟槽4为凸圆角沟槽阴极,是直接对阴极顶部倒圆角的方式获得,形成截面如图所示的沟槽;
如图2所示,在阴极炭块2的上顶面设置的沟槽为凸圆角的矩形沟槽阴极,是直接对截面为矩形的沟槽结构,在倒圆角。
如图3所示,在阴极炭块2的上顶面设置的沟槽为凸台式异型阴极,也可以对现有的带凸台的异型阴极进行改造,其本质是把如图2所示的阴极沟槽加宽。
通过上述几种带弧形倒角沟槽的异型阴极与现有带凸台的阴极炭块2比较,本实用新型的带弧形倒角沟槽的异型阴极的阻流作用相当,而焙烧启动简单(不需要专用装置)、成本较低,而与现有的带沟槽的异型阴极结构比较,本实用新型的阻流效果较好,避免了铝液流动时在沟槽的局部产生的湍流,寿命也更长。具有对电解槽改动少、节能效果好等优点,具有很好的经济效应、推广价值和实用价值。

Claims (5)

1.一种带弧形倒角沟槽的异型阴极,包括夹持有阴极钢棒(1)的阴极炭块(2),其特征在于:阴极炭块(2)的顶部对称两边为圆弧形倒角边(5)。
2.根据权利要求1所述的带弧形倒角沟槽的异型阴极,其特征在于:阴极炭块(2)的顶部为凸台式顶部,并且该凸台顶的对称两边为圆弧形倒角边(5)。
3.根据权利要求1或2所述的带弧形倒角沟槽的异型阴极,其特征在于:设有圆弧形倒角边(5)的阴极炭块(2)通过炭块糊(3)相互连接在一起,并且在两个连接在一起的阴极炭块(2)之间形成有带弧形倒角的沟槽(4)。
4.根据权利要求1所述的带弧形倒角沟槽的异型阴极,其特征在于:阴极炭块(2)为无烟煤、半石墨质或石墨材料制成的阴极炭块。
5.根据权利要求3所述的带弧形倒角沟槽的异型阴极,其特征在于:阴极炭块(2)的高度(H)为400~550mm,沟槽(4)的槽宽(B)为80~400mm、槽深(D)为50~250mm。
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