Magnetic materials, especially neodymium iron boron (NdFeB) permanent magnets, generate a large amount of waste during production, preparation, and application. The output of waste neodymium iron boron (NdFeB) in China has been increasing year by year. Rare earth resources are non-renewable, so recycling rare earth metals from waste neodymium iron boron (NdFeB) using economical and effective methods can create high economic value, conserve resources, and reduce environmental pollution.

Saint Langma has been researching waste neodymium iron boron (NdFeB) recycling technologies since the early days of its business. This is of great significance to the green and sustainable development of the rare earth industry, and also enables Saint Langma's permanent magnet products to significantly reduce production costs while meeting the required grade standards.

To understand the recycling of neodymium iron boron (NdFeB) magnets, it is essential to first understand the generation of sintered NdFeB waste. Generally, waste is produced in every stage of magnetic material production.

For instance:

l In raw material pretreatment, there are loss materials from various single raw materials, such as metallic neodymium, pure iron, ferroboron, metallic dysprosium, and cobalt.

l In the melting and strip casting process, oxide scales are generated; in the powder making process, ultrafine powder (with a particle size of less than 2 μm) and magnetic powder that catches fire due to exposure to air are produced.

An alloy powder scattered during magnetic field molding.

l During the sintering process, some slightly oxidized bulk neodymium iron boron (NdFeB) magnet waste is generated.

l Grinding powder, a large amount of leftover materials, and waste from processing damage are produced in mechanical processing.

l Defective products from surface treatment and finished product inspection.

l Waste strong magnets disassembled from scrapped motors.

Among these, the waste generated from mechanical processing losses and defective products from surface treatment accounts for a relatively large proportion of the total waste in the entire NdFeB production process.

The production process of recycled sintered neodymium iron boron (NdFeB) permanent magnets can reduce energy consumption by over 60% and carbon emissions by more than 67%. This means that for every 1 ton of recycled magnets produced, approximately 6 tons of carbon dioxide emissions can be reduced, which is equivalent to the carbon sequestration effect of planting 330 trees.

Meanwhile, Saint Langma's recycling process adopts low-VOC (Volatile Organic Compounds) coatings and lead-free welding technology, avoiding the emission of harmful heavy metals such as lead, cadmium, and mercury during production. The compliance rate of wastewater and waste gas treatment reaches 100%.

As the EU Carbon Border Adjustment Mechanism (CBAM) is gradually being implemented, choosing recycled sintered NdFeB permanent magnets provides core support for enterprises to avoid "carbon tariff" risks and achieve "low-carbon production".

Saint Langma extracts elements from waste through wet recycling and dry recycling processes. It makes full use of the characteristic of intact grain boundary structure of bulk neodymium iron boron (NdFeB) magnets waste to produce NdFeB magnets (in compliance with the national standard GB/T 34490-2017 Recycled Sintered neodymium iron boron (NdFeB) magnets

Saint Langma is committed to the recycling, processing, and comprehensive circular utilization of NdFeB waste. This approach not only alleviates the industry pain point of scarce rare earth resources but also helps enterprises save more than 30% of raw material costs, realizing a "win-win" of "environmental benefits" and "economic benefits" while consolidating the company's competitive position in the market.

Contact Saint Langma Magnetics now, and let our cooperation start here!

For more Products, please click: www.slmmagnet.com/PRODUCTS_subbwy.html

For more details, please contact us by

Email：cathywei@saintlangma.com/cocoslm2024@gmail.com