Process and equipment for recovering waste alkali liquor containing aluminum and heavy metals
A technology for recycling equipment and waste lye, which is applied in the direction of water/sewage multi-stage treatment, filtration treatment, water treatment parameter control, etc., and can solve the problem of high cost
Active Publication Date: 2021-11-09
北京汉昌绿源环保工程有限公司 +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
This method of scrapping spent lye and configuring new lye has a higher cost
Method used
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[0042] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] As an example, a recycling process for waste lye containing aluminum and heavy metals, which is used to recycle waste lye generated during the milling process of aluminum alloys;
[0044] Specifically include the following steps:
[0045] Impurity removal, used to remove metal elements other than aluminum, such as copper, zinc, manganese, etc., from the scrapped lye in the chemical milling groove;
[0046] More specifically, the impurity removal step includes: taking out the scrapped lye in ...
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The invention provides a process and equipment for recovering alkali liquor containing aluminum and heavy metals. The process is used for recovering waste alkali liquor generated in a chemical milling treatment process of an aluminum alloy. The process comprises the following steps: removing impurities; removing aluminum; and disassembling a bipolar membrane to obtain an acid solution and an alkali solution. The recovering equipment is used for recycling waste alkali liquor generated in the aluminum alloy chemical milling treatment process. The equipment comprises a chemical milling tank, an impurity removal tank, a pH adjusting tank, a first salt tank, a second salt tank, a bipolar membrane stack, an acid tank and an alkali tank. The acid solution is used for pH adjustment in the aluminum removal step, and the alkali solution is used for chemical milling treatment of aluminum alloy. According to the process and equipment for recovering the waste alkali liquor containing aluminum and heavy metal, the recycling cost is reduced, and the recycling process and equipment have the advantages of being small in occupied area of the process equipment, flexible and convenient to operate, capable of being started and stopped at any time and the like.
Description
technical field [0001] The invention relates to the technical field of waste liquid treatment in chemical milling treatment, in particular to a recovery process and equipment for waste lye containing aluminum and heavy metals. Background technique [0002] In the prior art, aluminum alloys are widely used due to their excellent performance, especially in the aerospace industry. [0003] For example, in aerospace systems, in order to control the total weight of the spacecraft, most of its shells use aluminum alloy materials with low density and strong structure. Some of the aluminum alloy structures need further chemical milling in order to further reduce weight: [0004] 1. According to the required shape, apply a layer of organic glue on the flat aluminum alloy surface, this kind of glue can be combined with aluminum alloy; [0005] 2. Finally, put the aluminum alloy into the chemical milling solution to react. The main composition of the chemical milling solution is NaOH...
Claims
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Login to View More IPC IPC(8): C02F9/04C02F101/10C02F101/20
CPCC02F9/00C02F2101/10C02F2101/20C02F1/66C02F2209/06C02F2209/10C02F1/444C02F1/5281C02F2001/007C02F1/5236C02F1/001Y02P10/20
Inventor 邹松华尚洪帅王帅东张昕宇彭建昌陈龙徐猛王建军
Owner 北京汉昌绿源环保工程有限公司