Sealed cobalt leaching device, reagent for cobalt leaching, method using device, use of method

A sealed cobalt leaching device, comprising a base, a top of which is provided with a first groove, wherein a chemical solution holding tool is provided above the base, a bottom of the chemical solution holding tool is removably connected to the base, a holding through-hole penetrating up and down is formed inside the chemical solution holding tool, a sealing cover is provided above the chemical solution holding tool;

• a first circular groove is formed downwards at the top of the base, the first groove is provided at a bottom surface of the first circular groove, the bottom of the chemical solution holding tool is connected to the first circular groove through a thread, a clamping groove, a hinge, or an external fixture;
• a second circular groove is formed upwards at a bottom of the sealing cover, the sealing cover and the chemical solution holding tool are connected through a thread, a clamping groove, a hinge, or a external fixture, and the second circular groove and an outer perimeter of the base are connected through a thread, a clamping groove, a hinge, or a external fixture;
• wherein a sealing gasket is provided between the chemical solution holding tool and the sealing cover, a bottom surface of the sealing gasket is provided with a sealing bump, the sealing bump and the holding through-hole are in an interference fit, and a tapered chamfer is formed at a top of the holding through-hole.