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Treatment method for carbon-containing solid waste in aluminum electrolysis industry
The invention provides a method for treating carbon-containing solid waste in the aluminum electrolysis industry, which comprises the following steps: the carbon-containing solid waste is crushed and then added into a fluidized bed furnace to be roasted, boiling gas in the fluidized bed furnace is at least one of preheated air and industrial oxygen, the height of a boiling layer is 10-300cm, the temperature of the boiling layer is maintained at 500-800 DEG C, the roasting time is 0.1-10 hours, and the carbon-containing solid waste is obtained. The roasted product is electrolyte mainly containing cryolite, and the carbon content is less than or equal to 1%. According to the method, after the waste cathodes of the aluminum electrolysis cell, the aluminum electrolysis carbon residues or the electrolytes obtained through flotation of the waste cathodes and the aluminum electrolysis carbon residues are subjected to boiling oxidation roasting, products are pure electrolytes, the carbon content is reduced to 1% or below, other impurities are not added, the requirements of aluminum electrolysis can be met, and all the electrolytes are subjected to resource utilization.
本发明提供一种铝电解行业含碳固废的处理方法，包括以下步骤：将含碳固废进行破碎，然后加入沸腾炉进行焙烧，所述沸腾炉内的沸腾气为经预热的空气、工业氧气中的至少一种，沸腾层的高度为10～300cm，沸腾层的温度维持为500～800℃，焙烧时间为0.1～10小时，焙烧后的产物为冰晶石为主的电解质且含碳量≤1%。本发明将铝电解槽废阴极、铝电解炭渣或其浮选所得电解质经沸腾氧化焙烧后，产物为较纯净电解质，含碳量降至1%以下，且不增加其他杂质，可满足铝电解的要求，使全部电解质得到资源化利用。
Treatment method for carbon-containing solid waste in aluminum electrolysis industry
The invention provides a method for treating carbon-containing solid waste in the aluminum electrolysis industry, which comprises the following steps: the carbon-containing solid waste is crushed and then added into a fluidized bed furnace to be roasted, boiling gas in the fluidized bed furnace is at least one of preheated air and industrial oxygen, the height of a boiling layer is 10-300cm, the temperature of the boiling layer is maintained at 500-800 DEG C, the roasting time is 0.1-10 hours, and the carbon-containing solid waste is obtained. The roasted product is electrolyte mainly containing cryolite, and the carbon content is less than or equal to 1%. According to the method, after the waste cathodes of the aluminum electrolysis cell, the aluminum electrolysis carbon residues or the electrolytes obtained through flotation of the waste cathodes and the aluminum electrolysis carbon residues are subjected to boiling oxidation roasting, products are pure electrolytes, the carbon content is reduced to 1% or below, other impurities are not added, the requirements of aluminum electrolysis can be met, and all the electrolytes are subjected to resource utilization.
本发明提供一种铝电解行业含碳固废的处理方法，包括以下步骤：将含碳固废进行破碎，然后加入沸腾炉进行焙烧，所述沸腾炉内的沸腾气为经预热的空气、工业氧气中的至少一种，沸腾层的高度为10～300cm，沸腾层的温度维持为500～800℃，焙烧时间为0.1～10小时，焙烧后的产物为冰晶石为主的电解质且含碳量≤1%。本发明将铝电解槽废阴极、铝电解炭渣或其浮选所得电解质经沸腾氧化焙烧后，产物为较纯净电解质，含碳量降至1%以下，且不增加其他杂质，可满足铝电解的要求，使全部电解质得到资源化利用。
Treatment method for carbon-containing solid waste in aluminum electrolysis industry
一种铝电解行业含碳固废的处理方法
YANG SHENG (author) / LIANG XUEMIN (author) / LU ZHIFENG (author) / ZHANG JIANXUN (author) / KONG YAPENG (author) / CHEN YURAN (author) / WANG LIQIANG (author)
2022-07-15
Patent
Electronic Resource
Chinese
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