【Ten Years of Rapid Development in Chemical Equipment】The first set of titanium dioxide waste acid refrigeration units was built and put into operation in Panzhihua from 2022 to 2025

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Let’s give praise and support to the achievements made in China’s chemical engineering technology and equipment. Your participation in discussions is the greatest encouragement**********************【Ten Years of Progress in Chemical Engineering Equipment】A continuously updated summary post is available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** On February 28th, it was learned from Nantong Sansheng Graphite Equipment Technology Co., Ltd. that the first set of waste acid freezing and crystallization equipment for the separation of ferrous sulfate heptahydrate, developed and built jointly by this company and Panzhihua Haifengxin Chemical Co., Ltd., has been in stable operation for over a year since its installation on February 9, 2024, and since then it has successfully passed the acceptance tests conducted by both parties, with all performance indicators meeting the design requirements. The high-purity ferrous sulfate heptahydrate produced through the cold crystallization of waste acid from titanium dioxide production serves as an important raw material for lithium-ion batteries, thus turning waste into a valuable resource. It expands the market demand across a wider range of areas, and it also helps titanium dioxide manufacturers reduce slag formation and improve efficiency. According to Jiang Ge, general manager of Panzhihua Haifengxin, the company behind the project, this device features a rational design that makes full use of existing equipment to complete the necessary components, thereby reducing system investment while also achieving significant energy savings and carbon reduction. The equipment operates stably; it only requires regular online cleaning with hot water, which takes 2–3 hours. It features a high degree of automation, minimal human intervention, and simple operation and maintenance. It shows that the first set of advanced and efficient waste acid freezing and crystallization equipment in the titanium dioxide industry has been successfully built and put into operation at Haifeng Xin, marking a significant breakthrough in the technology for comprehensive slag reduction and resource utilization in titanium dioxide production. It is reported that the waste acid freezing and crystallization device in Panzhihua City, developed by Haifengxin, is one of the process technologies for comprehensive slag reduction and resource utilization developed by Nantong Sansheng Company for the titanium dioxide industry. Firstly, it introduces new processes for the environmental treatment and comprehensive utilization of waste acid; secondly, it develops innovative methods for waste acid treatment that help reduce energy consumption and emissions; thirdly, it offers a unique approach for separating ferrous sulfate from waste acid.