Method for separating and extracting rhenium from rhenium-molybdenum mixed solution and co-producing ferromolybdenum alloy

Abstract

The invention discloses a method for separating and extracting rhenium from a rhenium-molybdenum mixed solution and co-producing a ferromolybdenum alloy. The method comprises the following steps of adding a molybdic acid radical precipitator into the rhenium-molybdenum mixed solution, precipitating molybdic acid radical under a weakly acidic condition, and carrying out solid-liquid separation to obtain molybdenum-rich slag and a rhenium-containing solution; adding a rhenic acid radical precipitator and a flocculant into the rhenium-containing solution, flocculating and precipitating rhenic acid radical, and carrying out solid-liquid separation to obtain rhenium-rich slag; and carrying out high-temperature drying and reduction roasting on the molybdenum-rich slag to obtain the ferromolybdenum alloy. According to the method, the selective separation effect on molybdenum and rhenium is good, the process is simple, the application range is wide, the cost is low, and the method is particularly suitable for rhenium-molybdenum separation and recycle in a solution with low molybdenum content and high rhenium content.

Description

technical field [0001] The invention relates to a method for separating molybdenum and rhenium, in particular to a method for separating and extracting rhenium from a rhenium-molybdenum mixed solution and co-producing ferromolybdenum alloy, belonging to the technical field of metallurgy. Background technique [0002] Molybdenum and rhenium are rare refractory and rare dispersed metals respectively, and are extremely important and scarce strategic metals, but the resources of molybdenum and rhenium are extremely poor, and the abundance of molybdenum in nature is 1×10 -4 (%), the abundance of rhenium is only 1×10 -7 (%). [0003] As a rare metal, molybdenum is an important non-renewable strategic resource and an important basic material for developing high-tech, realizing national modernization, and building modern national defense. According to USGS statistics, the total amount of molybdenum mined in 2019 is 2.9 million tons. The main molybdenum mining areas in the world ar...

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Problems solved by technology

[0011] Aiming at the problems of poor selectivity, high cost, and complicated process in the separation of molybdenum-rhenate radicals in the prior art, the purpose of the present invention is to provide a method for efficiently and selectively separating molybdenum-rhenium in the solution system and obtaining molybdenum-iron alloy by step-by-step precipitation method The method uses a highly selective precipitant to regulate the selective precipitation and separation of anionic molybdate and rhenate, and the molybdenum-enriched slag can be directly reduced to obtain a molybdenum-iron alloy. Good selective separation effect, simple process flow, wide application range and low cost, especially suitable for the separation and reuse of rhenium and molybdenum in solutions with low molybdenum content and high rhenium content