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A method for extracting molybdenum-rhenium

A molybdenum-rhenium and molybdenum-concentrate technology is applied in the field of microwave-assisted calcification roasting combined with microwave acid leaching to extract molybdenum-rhenium, which can solve problems such as lowering the grade of molybdenum ore resources, and achieve the effects of short production cycle, improved diffusion and high production efficiency

Active Publication Date: 2020-01-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the decreasing grade of domestic molybdenum ore resources, and the traditional roasting-leaching combined process cannot solve the problem of high-efficiency utilization of low-grade ore, it is particularly necessary to propose effective roasting-leaching process optimization ideas

Method used

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  • A method for extracting molybdenum-rhenium
  • A method for extracting molybdenum-rhenium
  • A method for extracting molybdenum-rhenium

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Experimental program
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Embodiment 1

[0058] Use molybdenite concentrate as raw material, add slaked lime, select the ratio of molybdenite concentrate and slaked lime as 1:1.3 (mass ratio), make it into pellets with a diameter of 5mm, dry them, and put them under air atmosphere after treatment Carry out microwave-assisted curing and roasting, the microwave frequency in the curing and roasting is 2450MHz, the microwave power in the curing and roasting is 1200W, the roasting temperature is set to 550°C and the roasting time is 120min, followed by microwave-assisted leaching, the leaching The microwave frequency in the process is 2450MHz, and the microwave power in the leaching process is 500W. The leaching treatment solidifies the calcined sand, adding sulfuric acid, the leaching temperature is 80°C and the leaching time is 60min to control the leaching rate of molybdenum rhenium, and finally vacuum filtration Realize the separation of leach residue and leachate.

[0059] The stirring rate during the microwave-assis...

Embodiment 2

[0064] Use molybdenite concentrate as raw material, add slaked lime, select the ratio of molybdenite concentrate and slaked lime as 1:1.1 (mass ratio), make it into pellets with a diameter of 5mm, dry them, and put them under air atmosphere after treatment Carry out microwave-assisted curing roasting, the microwave frequency in the curing roasting is 2450MHz, the microwave power in the curing roasting is 1200W, the roasting temperature is set to 600°C and the roasting time is 120min, followed by microwave-assisted leaching, the leaching The microwave frequency in the process is 2450MHz, and the microwave power in the leaching process is 500W. The leaching treatment solidifies the calcined sand, adding sulfuric acid, the leaching temperature is 80°C and the leaching time is 60min to control the leaching rate of molybdenum rhenium, and finally vacuum filtration Realize the separation of leach residue and leachate.

[0065] The stirring rate during the microwave-assisted leaching...

Embodiment 3

[0070] Use molybdenite concentrate as raw material, add slaked lime, select the ratio of molybdenite concentrate and slaked lime as 1:1.3 (mass ratio), make it into pellets with a diameter of 5mm, dry them, and put them under air atmosphere after treatment Carry out microwave-assisted curing roasting, the microwave frequency in the curing roasting is 2450MHz, the microwave power in the curing roasting is 1200W, the roasting temperature is set to 600°C and the roasting time is 120min, followed by microwave-assisted leaching, the leaching The microwave frequency in the process is 2450MHz, and the microwave power in the leaching process is 500W. The leaching treatment solidifies the calcined sand, adding sulfuric acid, the leaching temperature is 90°C and the leaching time is 60min to control the leaching rate of molybdenum rhenium, and finally vacuum filtration Realize the separation of leach residue and leachate.

[0071] The stirring rate during the microwave-assisted leaching...

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Abstract

The invention discloses a method for preparing molybdenum rhenium. The method comprises the following steps: performing solidification roasting on pellets with a calcium source and rhenium molybdenumconcentrate with microwave assistance at 500-650 DEG C, and performing acid soaking treatment on a roasting product, thereby obtaining an extract with molybdenum and rhenium, wherein the acid soakingstep is preferably carried out with microwave assistance. As the pellets are roasted with microwave assistance, a microscopic structure of rich cracks and pores can be formed in solidified roasted sand after roasting, leaching operation of a next step can be facilitated, and in addition, the metal recycling rate and the leaching rate can be increased. The method has multiple advantages of being green and environmentally friendly, short in production cycle, simple in process, high in production efficiency and the like, and is applicable to amplified production and wide in industrial applicationprospect.

Description

technical field [0001] The invention belongs to the field of microwave metallurgy, and in particular relates to a method for extracting molybdenum-rhenium by microwave-assisted calcification roasting combined with microwave acid leaching. Background technique [0002] Molybdenum has excellent properties such as high strength, high melting point, corrosion resistance, and abrasion resistance. It has a wide range of application values ​​in iron and steel industry, nonferrous metallurgy, petrochemical, aerospace military, agriculture and other fields. All governments regard it as an important strategic resource. The abundance of molybdenum in the crust is very low, with an average content of only 1.1×10 -4 %. There are more than 20 kinds of molybdenum minerals found in nature, but only four kinds have industrial value. Among them, molybdenite is the molybdenum mineral with the most mining value, the largest reserves and the widest distribution. About 99% of molybdenum exists...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B3/06C22B3/08C22B34/34C22B61/00
CPCC22B1/02C22B3/06C22B3/08C22B34/34C22B61/00Y02P10/20
Inventor 彭志伟李光辉姜涛彭健辉周林峰张元波饶明军李志忠叶雷唐慧敏范晓慧郭宇峰杨永斌徐斌杨凌志易凌云
Owner CENT SOUTH UNIV