| 简介 |
Disclosed is a method to regenerate a waste sludge of an inorganic abrasive material capable of stably removing impurities and maintaining the original ingredients. According to the present invention, the method to regenerate the waste sludge of an inorganic abrasive material comprises : (a) a step of forming a mixture by mixing water and the waste sludge collected from the inorganic abrasive material containing rare earth metal oxides used to polish a glass panel; (b) a step of removing impurities with relatively large sizes from the inside of the mixture through a sieve analysis process; (c) a step of adding a mixed acid wherein a formic acid and a strong acid are mixed at a ratio of 4 : 1-10 : 1 to the mixture after step (b), and stirring the mixture and the mixed acid at a pH of 2.0-3.0; (d) a step of separating a solid matter from a liquid matter by performing solid-liquid separation on a product from step (c), and cleaning the separated solid matter; (e) a step of pulverizing the solid matter; and (f) a step of removing organic matters from the solid matter by calcining the pulverized solid matter.(AA) Start(BB) End(S110) Mix waste sludge and water(S120) Remove impurities with large sizes(S130) Add and stir a mixed acid (a formic acid + a strong acid)(S140) Separate and clean a solid matter(S150) Pulverize the solid matter(S160) CalcineCOPYRIGHT KIPO 2015 |
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