-
About UsZhengzhou Coal Mining Machinery Green Materials Technology Co., Ltd. (hereinafter referred to as the “Company”) is a wholly-owned subsidiary of Zhengzhou Coal Mining Machinery Group (hereinafter referred to as the “ZCMG Group”), and is an important component of the ZCMG Group’s coal machinery sector’s “integrated” and “intelligent” strategies.
-
ProductsCast and forged parts for the entire series of hydraulic supports used in coal mining machinery, cast and forged parts for the entire series of scraper conveyors, castings for oil top drives, castings for gas turbine cylinders, castings for crushers, forgings for tunnel boring machines, and forgings for agricultural machinery equipment, among other products.
-
Technological innovationThe company places great emphasis on the integration of industry, academia, and research, and has established a deeply integrated innovation system with universities and research institutions such as Zhengzhou University, Henan University of Science and Technology, Henan University of Technology, and the Zhengzhou Institute of Mechanical Research.
-
BlogWe provide abundant industry insights and company updates to help you stay ahead of the market, grasp industry trends, and jointly create a bright future.
-
Join UsPersist in advancing innovation and development in tandem, closely following market demands and continuously pushing beyond our own limits.
-
Contact UsWe sincerely invite you to visit our company in person for an on-site tour and guidance. We look forward to collaborating with you to achieve shared growth and create a brilliant future together.
A breakthrough in the recycling technology for foundry waste sand, achieving a comprehensive utilization rate of 95%.
Release time:
2025/11/18
In recent years, the technology for the recycling and reuse of casting waste sand has achieved remarkable breakthroughs, with a comprehensive utilization rate reaching as high as 95%. This technology has become a key driving force behind the industry’s green transformation. By employing multi-stage purification, particle-size control, and performance reconstruction, the technology enables nearly “non-destructive” regeneration of old sand. The regenerated sand’s performance indicators now fully match or even surpass those of new sand, allowing it to directly replace new sand in the production of high-end castings such as automotive components and aerospace parts.
The technological breakthroughs are primarily reflected in three key areas: First, optimization of the thermal regeneration process—adopting a secondary roasting technique and using a heat exchanger to raise the air temperature inside the furnace, thereby ensuring complete combustion of residual carbon materials in the spent sand and enabling the recycling of thermal energy to reduce energy consumption. Second, combined dry-and-thermal regeneration—targeting mixed-type spent sand by first subjecting it to low-temperature roasting to brittle the binder film, followed by mechanical friction to remove the film, thus balancing efficiency and cost. Third, upgrading the intelligent sorting system—integrating modules such as magnetic separation, screening, and air classification to precisely separate ferrous impurities from fine powders, ensuring uniform particle size distribution of the regenerated sand and keeping the loss on ignition below 1.5%.
At the application level, companies such as Chongqing Changjiang Materials have already established 27 recycling production lines, with an annual capacity to process over 5 million tons of waste sand. The recycled sand is widely used by more than 500 automotive and rail transit enterprises. The separated dust, after proper treatment, is converted into construction auxiliary materials and soil conditioners, achieving full-process resource utilization. This technology not only reduces the amount of newly mined sand and lowers carbon emissions but also, through a closed-loop industrial chain model, promotes the casting industry’s transition toward a development path characterized by “low extraction, high utilization, and low emissions.”
Blog
Zhengzhou Coal Mining Machinery Green Materials Technology Co., Ltd.
Address: No. 58, Danjiang Road, Shangjie District, Zhengzhou City
Phone:+86-371-67891855(Administrative)
+86-371-67891856(Sales)
Fax:+86-371-67891856
Email:glgs.zmj@zmj.com
Website:www.zmjgl.com
TikTok
Copyright ©Zhengzhou Coal Mining Machinery Green Materials Technology Co., Ltd. www.300.cn Privacy Policy