Method for preparing fatty hydroximic acid collecting agent and application

Abstract

The invention discloses a method for preparing a fatty hydroximic acid collecting agent, which is characterized by comprising the following steps of: stirring alkyl hydroximic acid having more than or equal to 5 to 9 carbon atoms, fatty acid having 5 to 22 carbon atoms and mixed solvent oil having 4 to 30 carbon atoms for reaction at room temperature and then separating an oil phase from a water phase, wherein the oil phase is the fatty hydroximic acid collecting agent. The collecting agent of the invention has good selectivity, high collectivity, proper foaming characteristic and easy dissolution in water. Rare earth metal concentrate is obtained by the following steps of: grinding crude rare earth metal oxide ore; adding sodium hydroxide, water glass, sodium fluorosilicate and sodium sulphide into the grinded ore; adding the fatty hydroximic acid collecting agent of the invention into the mixture; then adding modified starch into the mixture; and finally performing flotation. The collecting agent of the invention is a flotation collecting agent for the rare earth metal oxide which is suitable for industrial production and has simple process and high separation efficiency.

Description

technical field [0001] The invention relates to a collector and its preparation method and application, in particular to a collector for flotation rare earth metal ore, its preparation method and application. Background technique [0002] At present, there are roughly three types of collectors for flotation separation of rare earth metal ores: ①Fatty acid collectors. For example, Professor Xiang Jingzi in Japan uses sodium oleate and No. 300 medicine; American Molybdenum Co., Ltd. uses lignin ammonium carbonate, water glass and N-80 oleic acid to produce bastnaesite concentrate at 90-100 ° C; ② alkane sulfonate Salt and phosphoric acid collectors. The application of such agents has only been reported in small-scale experiments and has not been used in production; ③ Hydroxamic acid collectors. For example, the former Soviet Union began to use NM-50 (C 7～9 Hydroxamic acid, patent number: SU390074A, 513970) flotation of rare earth metals. At the same time, my country also d...

AI Technical Summary

Problems solved by technology

Regardless of the desliming or non-sliming process, the separation index is not ideal. When the rare earth metal grade is > 40%, the rare earth metal recovery rate is only about 50%.