An overall solution to cathode-ray tube (CRT) glass recycling

摘要

Cathode-ray tube (CRT) display has entered the peak period of elimination, therefore, the disposal of waste CRT glass is becoming an urgent problem to be solved. At present, there are already many scholars having done a lot of researches on this problem, but most of them are constrained in some details of the disposal process, lack of research and development on the complete technical route of waste CRT glass. This paper highly summarized the overall solution of waste CRT glass, divided into three main procedures: the first step is CRT glass separation technology and equipment, including thermal-shock method with strong technical adaptation, simple operation and widely-used nowadays; diamond-cutting method, efficiency and with high cutting speed; or ultrasonic-chemical separation method, using ultrasonic wave to promote the dissolution of low melting glass and reduce the concentration of acid solution. The second step is water-ball milling cleaning technology and equipment, high cleaning efficiency, reducing dust and saving water, combined the traditional wet and dry cleaning technology. The third step is resource re-utilization, in which the direct use of CRT glass containing the leaded glass produces crystal glass and low lead fluorescent tube, and lead-free panel glass manufactures foam glass and glass beads; and the indirect use, comprising lead fire-extraction divided into collaborative smelting and electric furnace smelting, and lead mechanical-activation hydrometallurgy extraction, reducing the concentration of acid and improving the recovery rate. According to the existing technologies and equipment from your factory, the selection of appropriate technologies to deal with CRT glass achieves effective resource recycling and environmentally sound management goals.