2results about How to "Reduce particulate matter" patented technology

This invention provides a method for reducing particulate matter in high-purity metal materials. The method includes: (1) placing multiple metal sheets in a partitioned heating device to form a stack; wherein the partitioned heating device includes a first temperature zone and a second temperature zone distributed sequentially from top to bottom; a portion of the stack is located in the first temperature zone, and another portion is located in the second temperature zone; (2) sequentially performing a first-stage partitioned heating and a second-stage partitioned heating on the stack to obtain high-purity metal materials; wherein, during the first-stage partitioned heating process, the target temperature of the first temperature zone is greater than the target temperature of the second temperature zone. This invention performs two-stage partitioned heating on the stack formed by multiple metal sheets. During the first-stage partitioned heating process, melting begins from the top of the stack, thereby reducing the probability of the metal sheets slipping during melting and reducing particulate matter in the high-purity metal materials.

This invention discloses a method and system for controlling surface defects in strip steel, applied in a defect control system. The defect control system includes a coating liquid circulation subsystem. The inner wall of the circulation pipe in the coating liquid circulation subsystem is made of a smooth material. A backwashing device is installed at a predetermined position in the circulation pipe to improve the rinsing efficiency at the predetermined position. The defect control system also includes a cleaning device and a controller. The cleaning device is connected to the circulation pipe, and the controller is connected to the cleaning device. The method includes: controlling the cleaning device to rinse the circulation pipe at every preset cleaning cycle; during the operation of the coating liquid circulation subsystem, controlling the stirring speed during the coating liquid preparation process to be greater than a first preset speed threshold, and controlling the stirring speed during the coating liquid use process to be greater than a second preset speed threshold. This method can effectively improve the surface indentation defects of strip steel, avoid the generation of batch indentation defects, and thus improve the production quality of strip steel.