potassium cyanide kahan milta hai in hindi for Dummies
Cyanide is especially made for that mining of silver and gold: It can help dissolve these metals allowing for separation from the other solids. From the cyanide procedure, finely floor higher-grade ore is blended with the cyanide (in a ratio of about 1:500 sections NaCN to ore); lower-grade ores are stacked into heaps and sprayed with a cyanide sol