A process for extracting neodymium from waste electronic ceramic powder
An electronic ceramics and process technology, applied in the field of waste treatment technology, can solve problems such as waste of resources and pollution of the environment, and achieve the effects of avoiding waste, lowering treatment costs, and reducing emissions
Active Publication Date: 2015-10-28
全南晶环科技有限责任公司
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Problems solved by technology
On the one hand, this kind of waste will cause a lot of waste of resources, and on the other hand, it will pollute the environment.
Method used
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Experimental program
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Embodiment Construction
[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0027] In the embodiment, the recovered waste electronic ceramic materials are crushed and ground by a ball mill, and the electronic ceramic powder is ground to a mesh size of 100 mesh.
[0028] Add 1000kg of tap water to the alkali cooking pot, put in 1000kg of caustic soda, start stirring, put in 1000kg of milling material after the caustic soda dissolves, turn on the heat conduction oil switch of the soda cooking pot, the soda cooking pot starts to heat up, when the temperature of the soda cooking material reaches 100°C and After running for 8 hours, sampling and determining that the decomposition rate reaches 98% is the completion of alkali boiling. Add hot water to dilute, discharge the material into the washing tank, then add 80°C hot water ...
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The invention relates to a process for extracting neodymium from waste electronic ceramic powder. The process comprises the steps of carrying out raw material pretreatment on waste electronic ceramic elements as raw materials through grinding, soda boiling and water washing processes, and then carrying out deep treatment through twice acid dissolving process, wherein in the first acid dissolving process, a water washing material, oxydol, polyethylene glycol and hydrochloric acid are added to an acid dissolving pot to react so as to generate rare earth feed liquid, and a flocculant is added to the rare earth feed liquid to carry out flocculation reaction to separate most of impurities from the rare earth ion so as to facilitate purification and production of high-purity neodymium oxalate, and hydrochloric acid is utilized for second acid dissolving; carrying out acid dissolving impurity removal on the rare earth feed liquid obtained through separation after twice acid dissolving to further guarantee the purity of the material in the subsequent working procedure, carrying out impurity removal, water washing, carbonate precipitation, circulating acid dissolving and oxalic acid precipitation, and then baking to obtain a neodymium oxide finished product. By adopting the process, wastes can be effectively utilized to produce high-purity neodymium oxide, industrial wastes are reduced and the waste of rare earth resources is avoided; the method has realistic economic value and social value.
Description
technical field [0001] The invention relates to the field of waste material treatment technology, in particular to a technology for extracting neodymium from waste electronic ceramic powder. Background technique [0002] With its unique status in the field of rare earths, neodymium has become a hot spot in the market for many years and is widely used in electronics, machinery, aviation, military, communications, medical and other industries. Metal neodymium can not only be used to prepare NdFeB permanent magnet materials in industry, but also has its special role in the non-ferrous metal smelting industry. For example, adding 1.5~2.5% neodymium to magnesium or aluminum alloy can improve the high temperature performance of the alloy, Airtightness and corrosion resistance. In addition, it can be used as a process additive in the coloring of glass and ceramic materials and in the production of rubber products to improve product quality; at the same time, it can also be used as ...
Claims
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IPC IPC(8): C22B7/00C22B3/10C22B3/44C22B59/00
CPCY02P10/234Y02W30/54Y02P10/20
Inventor 徐欣王越红林斌陈其森黄金平
Owner 全南晶环科技有限责任公司