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A method for simultaneously processing molybdenite and white metal

A simultaneous treatment of molybdenite and molybdenite, applied in the field of non-ferrous metallurgy, can solve problems such as harmful emissions, achieve cost savings, easy industrial application, easy recycling and storage and transportation

Active Publication Date: 2018-01-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the wet leaching of molybdenite sulfur is almost completely transformed into sulfate or low-concentration sulfuric acid, and sulfur cannot be used and harmful emissions are formed

Method used

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  • A method for simultaneously processing molybdenite and white metal
  • A method for simultaneously processing molybdenite and white metal
  • A method for simultaneously processing molybdenite and white metal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] White alloy powder (with a particle size of ≤150μm accounting for 99.6%, Fe 15%, Cu 14.5%, Co 37.1%, Si11.1%) and molybdenite (containing Mo 57.92%, S 38.12%) in a mass ratio of 2:1 Mix mechanically, heat to 1500°C, keep warm for 20 minutes and then cool down. After the upper layer slag is separated, the lower layer material is ground to a particle size of ≤150μm, accounting for 95%, and its XRD pattern is shown in figure 1 . Configure 1.0mol·L -1 Sulfuric acid solution, the high-temperature reaction product is leached under oxygen pressure, the oxygen partial pressure is 0.8MPa, the leaching temperature is 120°C, and the leaching time is 1.0h. After mineral phase reconstruction, the total oxidation rate of molybdenum-containing sulfide is 98.67% (60.2% of Mo enters the solution and 39.8% enters the solid phase), the leaching rate of copper is 96.25%, the leaching rate of cobalt is 95.46%, and the leaching rate of iron is 96.65%. Analysis indicated 92.6% conversion o...

Embodiment 2

[0030] White alloy particles (200μm≤particle size≤1000μm accounted for 98%, Fe 10.5%, Cu 24.6%, Co 23.7%, Si8.4%) and molybdenite (containing Mo 48.23%, S 32.40%) by mass ratio 1.5 : 1 Mechanically mix, heat to 1000°C, keep warm for 120min and then cool. After the upper layer slag is separated, the lower layer material is ground to a particle size of ≤300μm, accounting for 95%, and its XRD pattern is shown in figure 2 . Configure 1.0mol·L -1 Sulfuric acid, 1.0mol·L -1 Nitric acid solution, the high temperature reaction product is subjected to normal pressure leaching. The leaching temperature is 80°C, and the leaching time is 1.5h. After mineral phase reconstruction, the total oxidation rate of molybdenum-containing sulfide is 98.86% (44.6% of Mo enters the solution and 55.4% of Mo enters the solid phase), the leaching rate of copper is 95.50%, the leaching rate of cobalt is 95.64%, and the leaching rate of iron is 95.65%. , Chemical analysis showed that the conversion r...

Embodiment 3

[0032] White alloy particles (200μm≤particle size≤1000μm accounted for 98%, Fe 14.5%, Cu 22.5%, Co 34.7%, Si14.1%) and molybdenite (containing Mo 15.86%, S 20.56%) by mass ratio 0.5 : 1 Mechanically mix, heat to 900°C, keep warm for 200min and then cool. After the upper layer slag is separated, the lower layer material is ground to a particle size of ≤300μm, accounting for 95%, and its XRD pattern is shown in image 3 . Configure 1.0mol·L -1 Sulfuric acid, 1.2mol·L -1 The ammonium persulfate solution will leach the high temperature reaction product. The leaching temperature is 80°C, and the leaching time is 2.0h. After mineral phase reconstruction, the total oxidation rate of molybdenum-containing sulfide is 98.36% (34.5% of Mo enters the solution and 65.5% of Mo enters the solid phase), the leaching rate of copper is 96.50%, the leaching rate of cobalt is 95.64%, and the leaching rate of iron is 95.65%. , Chemical analysis showed that the conversion rate of elemental sul...

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Abstract

The invention provides a method for simultaneously treating molybdenite and a white alloy. The method comprises: mechanically mixing a white alloy and molybdenite according to a predetermined ratio, carrying out a high temperature reaction to generate a mixed phase comprising iron, copper, cobalt and the like, and the polynary sulfide of molybdenum, removing the silicon in the white alloy and the gangue generation slag in the molybdenite, carrying out wet oxidation extraction on the molybdenum-containing polynary sulfide to extract iron, copper, cobalt, molybdenum and other metals, and generating the sulfur being in the original molybdenite during the extracting in a sulphur form. With the method of the present invention, the two difficultly-treated materials such as the white alloy and the molybdenite are subjected to the reaction at the high temperature to convert into the easily-extracted molybdenum-containing polynary sulfide, such that the mineral phase reconstruction is achieved, and the difficult treatment is changed into the easy treatment; and the method has characteristics of simple operation and cost saving, and is suitable for industrial applications.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, in particular to the metallurgical technology of refractory white alloy and molybdenite, and specifically relates to a method for simultaneously processing molybdenite and white metal. Background technique [0002] White metal is an intermediate product obtained by reduction smelting of copper oxide and cobalt concentrate. Its main components are cobalt, copper, iron, and a considerable amount of silicon. Due to its dense and stable structure, it is extremely difficult to break and has strong acid corrosion resistance. , is a typical refractory material. [0003] Molybdenite is a layered compound, which is bound by strong S-Mo-S ionic bonds in the layer, and the layers are maintained by weak van der Waals force, which is very easy to cleavage. The non-polar cleavage surface has strong hydrophobicity and is not easy to oxidize, making molybdenite an extremely difficult sulfide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/34C22B23/00C22B15/00C22B3/06
CPCY02P10/20
Inventor 赵中伟李飞
Owner CENT SOUTH UNIV
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