2results about How to "Realize impurity removal" patented technology

This invention discloses a method for preparing high-purity oxygen-free copper, relating to the field of metallurgical technology. The method includes multi-stage electrolytic refining, gradient-heating vacuum melting, inert gas-protected refining, electron beam melting, hydrogen plasma arc melting, directional solidification, and post-treatment steps. The multi-stage electrolytic refining utilizes a specific component electrolyte and periodically commutated current; vacuum melting is combined with bidirectional electromagnetic stirring; inert gas-protected refining is combined with a gradient reduction composite covering agent; electron beam and hydrogen plasma arc melting achieve deep purification and deoxidation; and directional solidification and two-stage annealing ensure product performance. The high-purity oxygen-free copper prepared by this invention has a conductivity of 102.3% IACS, a copper content ≥99.9999%, and an oxygen content <1.0 ppm. It exhibits high purity, low oxygen content, and excellent conductivity. The process is stable and controllable, making it suitable for high-end electronics applications.

A low-cost concentration and stepwise extraction and utilization process for valuable components of coal mine water is disclosed. This process employs pretreatment of mine water using drift flotation and flocculation sedimentation to remove impurities. Through oblique light correction to enhance solar radiation energy, film overflow heating of the mine water, flash distillation of hot mine water, and condensation collection, the mine water is concentrated at low cost within a solar distillation device. Metal and heavy metal components are extracted from the mine water through solid-phase and liquid-phase chemical conversions and utilized as resources. Highly toxic chromium and radioactive uranium are captured from the mine water using an adsorption + reduction method. Arsenic compounds are adsorbed using a loaded fluoride ion adsorbent. This process achieves low-energy consumption, resource recovery, and harmlessness in mine water treatment, enabling clean and circular utilization of the mine water. It represents a technology for fundamentally controlling mine wastewater pollution.