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Method of concentrate volatilization containing molybdenum-rhenium, and water leaching and separation of molybdenum-rhenium

A molybdenum concentrate and water leaching technology, applied in the field of molybdenum-rhenium metallurgy, can solve the problems of high waste gas treatment cost, large equipment investment, and low rhenium recovery rate

Active Publication Date: 2018-06-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Due to the inherent defects of the existing mainstream process for treating rhenium-containing molybdenum concentrates, such as complex procedures, low rhenium recovery rate, large equipment investment, and high waste gas treatment costs, the present invention proposes to separate molybdenum and rhenium from rhenium-containing molybdenum concentrates by simultaneous volatilization-water leaching new method

Method used

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  • Method of concentrate volatilization containing molybdenum-rhenium, and water leaching and separation of molybdenum-rhenium

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add molybdenum concentrate quality 50wt.% slagging agent (Al 2 o 3 40wt.%; SiO 2 10wt.%), obtain uniform green pellets with a diameter of 12mm and a water content of about 11% by pelletizing, and then cloth to a thickness of about 30mm. First let in 120°C low-temperature hot air for 10 minutes, then blow in 1050°C high-temperature hot air from bottom to top, and control the air volume per square meter at 280m 3 / h, the mixed steam is slowly cooled in the collection section, and the high-temperature hot air supply is stopped after 30 minutes. Through the analysis of the tailings, it can be concluded that the volatilization rate of Mo is 90.6%, and the volatilization rate of rhenium is higher than 99.9%. The average purity of molybdenum is higher than 99.9%. The sublimates in the cold section during work are taken below 500°C for water immersion separation. The liquid-solid ratio is 3, the water immersion temperature is 50°C, and the time is 40 minutes. The test resu...

Embodiment 2

[0023] Add molybdenum concentrate quality 50wt.% slagging agent (Al 2 o 3 40wt.%; SiO 2 10wt.%), obtain uniform green pellets with a diameter of 12mm and a water content of about 11% by pelletizing, and then cloth to a thickness of about 30mm. First let in 120°C low-temperature hot air for 10 minutes, then blow in 1100°C high-temperature hot air from bottom to top, and control the air volume per square meter at 300m 3 / h, the mixed steam is slowly cooled in the collection section, and the high-temperature hot air supply is stopped after 25 minutes. Through the analysis of tailings, it is concluded that the volatilization rate of Mo is 93.6%, and the volatilization rate of rhenium is higher than 99.9%. The average purity of molybdenum is higher than 99.9%. Take the sublimes in the cold section below 500°C during work, and carry out water immersion separation. The liquid-solid ratio is 3, the water immersion temperature is 50°C, and the time is 40 minutes. The test results ...

Embodiment 3

[0025] Add the slagging agent (Al 2 o 3 32wt.%; SiO 2 8wt.%), obtain uniform pellets with a diameter of 12mm and a moisture content of about 9% by making pellets, and then spread them to a thickness of about 30mm. First let in 120°C low-temperature hot air for 10 minutes, then blow in 1100°C high-temperature hot air from bottom to top, and control the air volume per square meter at 300m 3 / h, the mixed steam is slowly cooled in the collection section, and the high-temperature hot air supply is stopped after 25 minutes. Through the analysis of tailings, it is concluded that the volatilization rate of Mo is 89.4%, and the volatilization rate of rhenium is higher than 99.9%. The average purity of molybdenum is higher than 99.8%. Take the sublimes in the cold section below 500°C during work, and carry out water immersion separation. The liquid-solid ratio is 2. Add 5wt.% hydrogen peroxide to the immersion liquid, and the leaching temperature is 50°C. The test time is 40 minu...

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Abstract

The invention discloses a method of concentrate volatilization containing molybdenum-rhenium, and water leaching and separation of the molybdenum-rhenium. The concentrate containing the molybdenum-rhenium is used as a raw material, a slagging agent is added and mixed to make a pellet, then the pellet is heated to 900-1150 DEG C, an oxygen-containing flow is supplied to produce a mixed vapor comprising a molybdenum oxide and a rhenium oxide, two-stage cooling separation is carried out to obtain a condensation product, water immersion treatment is carried out on the rhenium-rich condensation product, the rhenium is separated into the water immersion liquid, and the rest part is the pure molybdenum trioxide product. According to the method, molybdenum and rhenium are volatilized together through high-temperature oxidation roasting, and molybdenum and rhenium are separated through the water leaching, the method has the advantages of being efficient in production, simple in process, good inequipment adaptability, high in product additional value and the like, and the method is suitable for industrial application.

Description

technical field [0001] The invention discloses a method for separating molybdenum-rhenium by volatilization-water immersion of rhenium-containing molybdenum concentrate; it belongs to the technical field of molybdenum-rhenium metallurgy in the nonferrous metallurgy industry. Background technique [0002] Oxidation roasting-ammonia leaching process is the mainstream method for processing rhenium-molybdenum concentrates in my country. During the oxidation roasting process, molybdenum is transformed into molybdenum trioxide and retained in the molybdenum calcine, and the calcine is processed by pickling, ammonia leaching, purification, acid precipitation (extraction), crystallization, etc. to obtain pure ammonium molybdate, and the pure ammonium molybdate is roasted Pure molybdenum trioxide is obtained; while rhenium is oxidized and volatilizes into the dust, enters the solution through acid leaching, and then can be separated and enriched by means of extraction and ion exchang...

Claims

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Application Information

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IPC IPC(8): C22B34/34C22B61/00C22B1/24C22B1/02C22B3/04
CPCC22B1/02C22B1/2406C22B3/04C22B34/34C22B61/00Y02P10/20
Inventor 李光辉孙虎姜涛彭志伟饶明军罗骏张元波余俊杰张鑫
Owner CENT SOUTH UNIV
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