Our company has conducted in-depth and extensive analysis and research on the performance and degradation mechanism of quenched nitrate used in heat treatment. Through extensive testing and experimental work, we have determined the mechanism and degradation products of quenched nitrate. Based on this, a lot of work has been carried out on the regeneration of deteriorated nitrate in quenching, especially on the selection of filter materials and filters for solid suspended solids filtration in molten salt, as well as the removal methods of meltable impurities. Extensive research and testing have been conducted to determine the regeneration scheme of quenching salt. Through production trials at Xiangyang Automotive Bearing Company, especially the improved Luoyang Bearing Company, the effect has been demonstrated, and the performance of the regenerated quenching salt fully meets the requirements, verifying the success of the regeneration scheme and receiving high praise from relevant customers; A simple, low-cost, and environmentally friendly treatment process has been developed for the harmless treatment of discarded quenching salts (residues, etc.) containing sodium nitrite, based on the premise of testing current treatment methods at home and abroad one by one. The success of this solution has solved the concerns of using advanced technology such as nitrate quenching (the cost and lifespan of salt usage; the difficulty and high cost of waste disposal), and will further promote the application of nitrate quenching technology.

Representative unit for molten salt purification:

Xiangyang Automotive Bearing Co., Ltd

Luoyang LYC Bearing Co., Ltd

Luoyang Bearing Research Institute Co., Ltd

Chunzhongdao Machinery (Kunshan) Co., Ltd