Equipment and method for removing iron and organic matters from neodymium-iron-boron oil sludge waste material through air and ozone two-stage oxidization by wet method at normal temperature

Abstract

The invention discloses equipment and a method for removing iron and organic matters from a neodymium-iron-boron oil sludge waste material through air and ozone two-stage oxidization by a wet method at normal temperature, and relates to a metal extracting method. The equipment mainly comprises a clean water sink (1), a dissolving pond (3), an ozone oxidation tank (5), a sedimentation pond (6), anair pump (9) and an ozone generating device (10); and the method for removing the iron and the organic matters comprises the following steps: performing acid dissolving, performing first-stage air oxidizing, performing second-stage ozone oxidizing, neutralizing to removing impurities, and separating a rare earth element-containing material liquid and filtered residue. The equipment and the methodare beneficial to improving the purity of the recycled rare earth element, reduces the emission of organic waste, and has high environmental benefit and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a resource recovery equipment and method, and more specifically to a metal extraction equipment and method. Background technique [0002] Neodymium iron boron (NdFeB) is a third-generation rare earth permanent magnet material, containing about 30% of rare earth elements (neodymium is the main component, followed by praseodymium and dysprosium), and has the characteristics of light weight, small size and strong magnetism. So far the most cost-effective magnet, known as the king of magnetism in the field of magnetism. Now, sintered NdFeB permanent magnet materials have become very important basic functional materials, and are vigorously promoting the improvement of technology in various industries. [0003] China is a major producer of NdFeB materials. In 2013, the output of NdFeB materials reached 94,000 tons, accounting for 91% of the global total. In the whole process ...

AI Technical Summary

Problems solved by technology

Moreover, with the development of the economy and society and the country's great emphasis on the construction of ecological civilization, the environmental costs of waste gas emission and treatment will continue to increase, which will put many rare earth recovery and production enterprises using oil sludge as raw materials in trouble

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