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Method For Preparing Ferro Molybdenum From Molybdenite

A manufacturing method and technology of molybdenite, applied in the field of ferromolybdenum, can solve problems such as difficult to control the reaction and cannot obtain uniform products, and achieve the effects of promoting recovery, uniform production and continuous processing, and reducing energy consumption

Inactive Publication Date: 2014-09-03
KOREA INST OF GEOSCI & MINERAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the metallothermic reduction occurs explosively and completes almost instantaneously, making it difficult to control the reaction and not to obtain a homogeneous product

Method used

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  • Method For Preparing Ferro Molybdenum From Molybdenite
  • Method For Preparing Ferro Molybdenum From Molybdenite
  • Method For Preparing Ferro Molybdenum From Molybdenite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The sample mixture (i.e., 192 g of molybdenite, 56 g of iron powder and 32 g of aluminum powder) was spun at 140 rpm for 30 minutes at a filling rate of 50% in a 1-liter ceramic ball mill (diameter: 2 cm) and then separated from the balls. ) was used as a sample for reduction experiments.

[0041] In the reduction reaction, an alumina crucible with a diameter of 8 cm and a height of 12 cm was used as a reactor. The mixed sample placed in the reactor was charged as figure 1 The graphite crucible of the apparatus is shown, and the experiment is carried out. Flow argon gas at a flow rate of 5 L / min for 20 minutes, start heating, and the temperature of the crucible reaches 1690° C. after 70 minutes. The reduction reaction was continued at this temperature for 10 minutes, and then the crucible was cooled for 12 hours at ambient temperature. In the experimental area, the reaction products were well separated into slag and ferromolybdenum. In this case, by figure 2 X-ray d...

Embodiment 2

[0043] In the mixing of samples, Example 2 is similar to Example 1, except that 36 g of aluminum powder is added.

Embodiment 3

[0045] In the mixing of samples, Example 3 is similar to Example 1, except that the added aluminum powder is 38g.

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Abstract

The invention provides a method for producing ferromolybdenum from molybdenite concentrate, more specifically, it provides a method for producing ferromolybdenum with copper content below 0.5% from molybdenite with high copper content without separate removal Copper process method by placing molybdenite, metallic aluminum and metallic iron in a heating furnace and allowing them to react at high temperature, thereby producing ferromolybdenum in the lower part of said heating furnace, and in the upper part of said heating furnace The slag is formed using aluminum sulfide and iron sulfide as main components, and most of the copper (80%-95%) present in the molybdenite is placed in the slag layer. Exemplary embodiments may shorten the process and reduce consumption of a reducing agent (ie, aluminum) compared to a related art metallothermal reduction (thermite) method.

Description

technical field [0001] The invention relates to a method for producing ferromolybdenum with a copper content of 0.5 wt% or less from low-grade molybdenite (containing 0.5 wt% to 10 wt% Cu) with a high copper content. Background technique [0002] Molybdenum is a relatively rare element not found in nature as a metal. Molybdenum can improve the thermal creep of steel, prevent temper brittleness of steel and improve the corrosion resistance of steel. As an alloying element, it is a very important element in the manufacture of heat-resistant steel or corrosion-resistant steel. [0003] Molybdenite (MoS 2 ) are very economically available primary raw materials. Usually, the raw ore contains a lower concentration of molybdenite (MoS 2 ); however, molybdenite is easily recovered and concentrated by froth flotation due to its sulfide nature. Available natural resources of molybdenite are mainly located in countries such as China, the United States or Chile, and are mainly produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22B34/34C22B9/05
CPCC22C27/04C22B5/04C22B34/34C22C1/02
Inventor 崔荣允金相培徐昌烈南哲祐
Owner KOREA INST OF GEOSCI & MINERAL RESOURCES
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