LCD Leaching Method of Indium from Waste Liquid Crystal Dispaly Panel

• Main Authors: PARK KYUNG SOO, PARK JAE LAYNG, BASUDEV SWAIN, LEE CHAN GI
• Format: Patent
• Language: English; Korean
• Published: 11.03.2022
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention provides an indium leaching method from a wasted LCD panel, comprising the following steps of: (a) recovering glass powders by crushing the wasted LCD panel; and (b) recovering indium by leaching the recovered glass powders by using an acidic solvent and an oxidizing agent. A molar concentration of the acidic solvent ranges from 3 to 6 M, and a pulp density of the recovered glass powders with respect to the acidic solvent ranges from 400 to 600 g/L. According to the present invention, indium recovery rate is increased by leaching high concentrations of indium. 본 발명은, (가) 폐 LCD 패널을 분쇄하여 유리 분말을 회수하는 단계; 및 (나) 상기 회수된 유리 분말을 산성 용매 및 산화제를 이용하여 침출 반응시켜 인듐을 회수하는 단계;를 포함하고, 여기서, 상기 산성 용매의 몰 농도는 3 내지 6 M이며, 상기 산성 용매에 대한 회수된 유리 분말의 광액 농도 400 내지 600 g/L인 폐 LCD 패널로부터 인듐 침출 방법을 제공한다.