PREPARATION METHOD OF METAL CYANIDE USING COOLING CRYSTALLIZATION AND DEWATERING PROCESS

摘要

The present invention relates to a method for preparing metal cyanide using a cooling crystallization and dehydration process and, more specifically, to a method for preparing metal cyanide using a cooling crystallization and dehydration process, comprising the following steps: injecting a positive chamber including a positive electrode and a negative electrode chamber including a negative electrode of an electrolytic leaching apparatus including a cation exchange membrane, and applying a voltage, while maintaining temperature of the positive electrode chamber and negative electrode chamber at 55-60°C to prepare a metal cyanide solution; and crystallizing the solution by cooling the prepared metal cyanide solution to 10-15°C, and separating a solid and a liquid by a dehydration process to obtain metal cyanide.