Method for preparing ammonium perrhenate

Abstract

The invention discloses a method for preparing ammonium perrhenate, which is characterized by comprising the following steps: 1. washing and cooling flue gas generated by tungsten gold ore roasting through an eluting tower, so that perrhenic acid contained in the flue gas is dissolved in water, and the water solution containing the perrhenic acid is used for circularly eluting the roasting flue gas to increase the concentration; 2. collecting the perrhenic acid water solution, carrying out rough filtration, and carrying out nanofiltration concentration on the filtrate with nanofiltration membrane equipment to obtain a perrhenic acid nanofiltration concentrated solution; and 3. passing the perrhenic acid nanofiltration concentrated solution through continuous ion exchange equipment, eluting rhenium with a resolving agent, heating to concentrate the collected eluate at 100 DEG C, cooling, and crystallizing to obtain the ammonium perrhenate. By using the flue gas generated by tungsten gold ore roasting as the raw material, the nanofiltration membrane equipment and continuous ion exchange equipment are utilized to recover the ammonium perrhenate, thereby achieving the goals of resource recovery and environment protection; and thus, the method has favorable economic value and environmental benefit.

Description

technical field [0001] The invention relates to a method for recovering H2ReO4 from flue gas after tungsten-gold ore roasting by using nanofiltration membrane concentration equipment and continuous ion exchange equipment. Background technique [0002] Rhenium is a kind of scattered metal. There is no elemental rhenium in nature. Rhenium is often used as a coating material because of its excellent ductility, wear resistance and high temperature resistance. The application of rhenium is becoming more and more extensive, and the supply in the market is in short supply. It is mainly used in petroleum smelting catalysts, thermoelectric superalloys, electron tube structural materials, aerospace special alloys, environmental protection and other fields. [0003] Rhenium itself has no independent deposits, and is often dispersed in other non-ferrous metal ore bodies. It mainly coexists with molybdenite, mostly associated with molybdenum, copper, lead, zinc, platinum and other minera...

AI Technical Summary

Problems solved by technology

As a result, rhenium is diluted, and at the same time, due to the very similar properties of rhenium and molybdenum, it is difficult to separate molybdenum and rhenium. Therefore, many domestic molybdenum production enterprises discard the molybdenum roasting flue gas absorption liquid as waste liquid, which not only pollutes the environment but also caused a waste of resources

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