Date of patent application: March 26th, 2005.
Process and equipment for extracting zinc, copper, nickel and cobalt from oxidized ore by hydrometallurgy.
Publication (announcement)No. CN 17 18783
Publication date (announcement) 2006+0.438+0438+0
Category chemistry; metallurgy
Certification date
right of priority
Apply for (patent right) Yin Guozong
Address: Room 067000, Room 206, Unit 3, Building KLOC-0/02, Jing Ya Villa, Shidongzigou, Chengde, Hebei.
Inventor (Designer) Yin Guozong
International application
International announcement
date of entry
Patent Agency Chengde Jinwen Patent Office
Acting Luo
abstract
The invention discloses a process and device for extracting zinc, copper, nickel and cobalt from oxidized ores by hydrometallurgy, which can treat and extract sulfide and oxidized zinc, copper, nickel and cobalt ores. The device is a closed circulation system, and the extractant can be recovered and reused. Using the mixed solution of ammonia water and ammonium bicarbonate as extractant, the extraction rate can reach above 90% after mixing with mineral powder and fully stirring for a certain period of time. Then the metal solution is decomposed by heating, filtered, dried and electrolyzed to obtain the extracted metal, which is especially suitable for low-grade zinc oxide ore. This method is simple and reliable, with wide application range and low cost. This method can reduce the production cost, and the metal extraction rate can reach more than 90%.
Sovereignty terms
1. A process for extracting zinc, copper, nickel and cobalt from oxidized ore by hydrometallurgy includes adding mineral powder and necessary extractant into a stirring tank, fully stirring, and then adding into a reaction tank. Characterized in that the mixed solution of ammonia water and ammonium bicarbonate is used as an extractant, and the ratio of ammonia water to ammonium bicarbonate is determined according to the concentration of ammonia water, and the ratio of 10% ammonia water is 20: 1. The ratio is 15: 1, and the ratio of 20% ammonia water is 10: 1. The ore is crushed into mineral powder with particle size less than 65438±0mm, and the dosage of extractant is determined according to the amount of zinc, copper, nickel or cobalt contained in the ore. For mineral powder with metal content less than 5%, extraction is used per ton. The dosage of extractant is increased by 0.5 tons, and the extraction process flow is as follows: (1) preparation of active zinc oxide: ore oxidation-crushing-extractant leaching-filtration-impurity removal and replacement-extractant decomposition and recovery-drying-roasting-crushing-active zinc oxide finished product; (2) preparing high-grade zinc fine powder: oxidizing ore, pulverizing, leaching with extractant, filtering, decomposing and recovering extractant, and drying to obtain high-grade zinc fine powder; The specific process flow is as follows: adding mineral powder and required extractant into a stirring tank, fully stirring, inputting into a reaction tank, fully stirring through a stirrer installed on the reaction tank, testing once every 65,438+/-0 hours, and continuously stirring for 3 hours; After the extraction rate reaches 90%, the metal solution generated by the reaction is input into the liquid storage tank, and then the metal solution flows from the liquid storage tank into the decomposition tank and is heated until the metal solution is colorless.