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Method and apparatus for separation of molybdenite from pyrite containing copper-molybdenum ores

A pyrite and ore technology, applied in solid separation, flotation and other directions

Inactive Publication Date: 2015-04-08
OUTOTEC FINDLAND OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned problems associated with the use of lime in flotation cannot be avoided in this method

Method used

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  • Method and apparatus for separation of molybdenite from pyrite containing copper-molybdenum ores
  • Method and apparatus for separation of molybdenite from pyrite containing copper-molybdenum ores
  • Method and apparatus for separation of molybdenite from pyrite containing copper-molybdenum ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Four hybrid rapid flotation tests were performed at laboratory scale using ore bodies from Deposit A ​​in Table 1, and four different reagent combinations. The reagents used in the tests are shown in Table 2.

[0062] Table 2

[0063] Test serial number

Reagents used in fast flotation

5

Na 2 CO 3 +fuel oil+xanthates

11

Na 2 CO 3 +fuel oil+Na 2 S

13

Na 2 CO 3 +fuel oil+Na 2 S+xanthate

17

Na 2 CO 3 + fuel oil

[0064] The results of the rapid flotation tests are shown in Table 3. The values ​​in each column describe the recovery of each chemical element (Cu, Fe, Mo, S) in the fast flotation concentrate expressed as a percentage by mass of the initial content of the element in the ore body. The last column describes the sulphide content in the concentrate.

[0065] table 3

[0066] Test serial number

Cu%

Fe%

Mo%

S％

Sulfide %

5

52.4

15.2

47...

Embodiment 2

[0074] Optimal dosages of soda ash and sodium sulfide in the mixed flash flotation step were examined in terms of consistency with the new method during small-scale testing. Different conditions for slurry preparation in Figure 4 described in , where the arrows indicate the order of the conditions tested, including first adding Na at 800 g / t, 1200 g / t and 1500 g / t 2 CO 3 , then Na 2 CO 3 Add a small amount of Na together 2 S. Finally, 10g / t of Na was tested 2 S and 200g / t Na 2 CO 3 The combination. Combined with the conditions tested, the reduction potential (Eh vs. SHE) and pH of the slurry were measured. Tests show that using 10g / t of Na 2 S and 200g / t Na 2 CO 3 combination can give good results.

[0075] It was found that the optimum dosage of soda ash and sodium sulphide can be achieved when the relationship between Eh and pH is in the following region:

[0076] Eh=E 0 -59pH (1)

[0077] where for the following reactions, E 0 =437...457:

[0078] CuFeS ...

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Abstract

A method and an apparatus for the separation of the mineral components of a pyrite containing copper-molybdenum ore by flotation. The method comprises grinding the ore in the presence of soda ash in an open circuit to produce an aqueous ore slurry; subjecting the slurry to a collective flash flotation step (10) in the presence of soda ash and sodium sulphide to recover a first part of metal sulphides of the ore in the form of a first concentrate (C1); subjecting the tailings (T1) of the collective flash flotation step (10) to a grinding step (13) and to a collective rougher flotation step (14) to recover a second part of metal sulphides of the ore in the form of a second concentrate (C3); and subjecting the concentrate (C1) of the collective flash flotation step (10) and the concentrate (C3) of the collective rougher flotation step (14) to a selection step (12) to separate molybdenite from the other metal sulphides of the concentrate.

Description

field of invention [0001] The present invention relates to a method for separating mineral components from pyrite-containing copper-molybdenum ores by flotation. The invention also relates to a device for carrying out the method. Background of the invention [0002] Most economically important base metal deposits worldwide contain mixed sulphides. Molybdenite, the most important source of molybdenum, is usually present in low concentrations with other metal sulphide minerals, such as those containing copper and / or iron. Traditional beneficiation methods for this ore involve mixed flotation of metal sulphides followed by separation of the desired metal sulphides, or selective flotation of the desired metal sulphides based on unique ore properties. [0003] Table 1 shows the ore composition of six mined or explored copper-molybdenum ore deposits in Eastern Europe or Asia. Pyrite (FeS 2 ) and silicates (feldspar, quartz, muscovite, sericite, biotite, chlorite) are common co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/002B03D1/02
CPCB03D2203/02B03D1/002B03D2201/007B03D1/02B03D1/006B03D1/012B03D1/028B03D2201/02
Inventor G·N·马舍夫斯基R·格劳M·吕拉A·V·彼得罗夫
Owner OUTOTEC FINDLAND OY
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