A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for producing saltpetering inhibitor and flocculant by using red mud
The invention relates to a method for producing a saltpetering inhibitor and a flocculating agent by using red mud, and belongs to the technical field of comprehensive utilization of solid waste resources. The method comprises the following steps: (1) adding red mud into an acid leaching reaction kettle, and then adding a sulfuric acid solution prepared from water, waste sulfuric acid and concentrated sulfuric acid; (2) heating the acid leaching reaction kettle while stirring, and carrying out acid leaching; (3) after the acid leaching is finished, carrying out filter pressing by using a filter press to obtain filtrate and a filter cake; (4) replacing the waste acid in the step (1) with the filtrate, repeating the steps (1) to (3) for multiple times, transferring the obtained filtrate into a polymerization reaction kettle, merging filter cakes obtained each time, and uniformly mixing to obtain the saltpetering inhibitor; and (5) heating the filtrate in the polymerization reaction kettle, dropwise adding a hydrogen peroxide solution to oxidize Fe < 2 + > into Fe < 3 + >, dropwise adding a Na0H solution, adjusting the pH value of the filtrate, and carrying out polymerization reaction to obtain the flocculant. When the red mud sintered brick is prepared from the red mud, 5% of the saltpetering inhibitor is doped, so that the saltpetering problem of the red mud sintered brick can be effectively solved; the prepared flocculating agent can effectively treat domestic sewage, and the treatment efficiency of the domestic sewage is improved.
本发明涉及一种利用赤泥生产泛碱抑制剂和絮凝剂的方法，属于固废资源综合利用技术领域。方法包括：（1）在酸浸反应釜中加入赤泥，然后加入用水、废硫酸和浓硫酸配制的硫酸溶液；（2）边搅拌边对酸浸反应釜加热，进行酸浸；（3）酸浸结束后，利用压滤机进行压滤，得到滤液和滤饼；（4）将滤液代替步骤（1）中的废酸，重复步骤（1）至步骤（3）多次后，将得到的滤液转入聚合反应釜中，将每次得到的滤饼合并后，混匀，得到泛碱抑制剂；（5）对聚合反应釜中的滤液进行加热，滴加过氧化氢溶液将Fe2+氧化为Fe3+后，滴加Na0H溶液，调节滤液pH值，进行聚合反应，得到絮凝剂。在采用赤泥制备赤泥烧结砖时，掺入5%泛碱抑制剂可有效地解决赤泥烧结砖出现的泛碱问题；本发明制备得到的絮凝剂能够有效地的处理生活污水，提高生活污水的处理效率。
Method for producing saltpetering inhibitor and flocculant by using red mud
The invention relates to a method for producing a saltpetering inhibitor and a flocculating agent by using red mud, and belongs to the technical field of comprehensive utilization of solid waste resources. The method comprises the following steps: (1) adding red mud into an acid leaching reaction kettle, and then adding a sulfuric acid solution prepared from water, waste sulfuric acid and concentrated sulfuric acid; (2) heating the acid leaching reaction kettle while stirring, and carrying out acid leaching; (3) after the acid leaching is finished, carrying out filter pressing by using a filter press to obtain filtrate and a filter cake; (4) replacing the waste acid in the step (1) with the filtrate, repeating the steps (1) to (3) for multiple times, transferring the obtained filtrate into a polymerization reaction kettle, merging filter cakes obtained each time, and uniformly mixing to obtain the saltpetering inhibitor; and (5) heating the filtrate in the polymerization reaction kettle, dropwise adding a hydrogen peroxide solution to oxidize Fe < 2 + > into Fe < 3 + >, dropwise adding a Na0H solution, adjusting the pH value of the filtrate, and carrying out polymerization reaction to obtain the flocculant. When the red mud sintered brick is prepared from the red mud, 5% of the saltpetering inhibitor is doped, so that the saltpetering problem of the red mud sintered brick can be effectively solved; the prepared flocculating agent can effectively treat domestic sewage, and the treatment efficiency of the domestic sewage is improved.
本发明涉及一种利用赤泥生产泛碱抑制剂和絮凝剂的方法，属于固废资源综合利用技术领域。方法包括：（1）在酸浸反应釜中加入赤泥，然后加入用水、废硫酸和浓硫酸配制的硫酸溶液；（2）边搅拌边对酸浸反应釜加热，进行酸浸；（3）酸浸结束后，利用压滤机进行压滤，得到滤液和滤饼；（4）将滤液代替步骤（1）中的废酸，重复步骤（1）至步骤（3）多次后，将得到的滤液转入聚合反应釜中，将每次得到的滤饼合并后，混匀，得到泛碱抑制剂；（5）对聚合反应釜中的滤液进行加热，滴加过氧化氢溶液将Fe2+氧化为Fe3+后，滴加Na0H溶液，调节滤液pH值，进行聚合反应，得到絮凝剂。在采用赤泥制备赤泥烧结砖时，掺入5%泛碱抑制剂可有效地解决赤泥烧结砖出现的泛碱问题；本发明制备得到的絮凝剂能够有效地的处理生活污水，提高生活污水的处理效率。
Method for producing saltpetering inhibitor and flocculant by using red mud
一种利用赤泥生产泛碱抑制剂和絮凝剂的方法
REN JINXIN (author) / YANG MUQING (author) / ZHU YAOWEI (author) / YAN DONGFEI (author) / WANG YUELONG (author) / ZHANG YUBING (author) / BAN JUNSHENG (author)
2024-05-07
Patent
Electronic Resource
Chinese
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