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Method and system for recovering main associated elements from copper-nickel sulfide ore

A technology of associated elements and sulfide ore, which is applied in the field of non-ferrous metallurgy, can solve the problems that cannot be effectively realized, and achieve the effects of convenient transportation and storage, effective recovery, and improved recovery rate

Active Publication Date: 2017-08-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the recovery of various elements cannot be effectively realized in the existing copper-nickel sulfide ore smelting process, especially the recovery rate of the element cobalt and precious metals is too low

Method used

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  • Method and system for recovering main associated elements from copper-nickel sulfide ore

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Experimental program
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Effect test

Embodiment 1

[0069] Such as figure 1 As shown, in this example, the copper-nickel sulfide ore is smelted by matte making to obtain low nickel matte, the main element content: Ni20.21%, Cu 10.52%, Fe37.44%, Co 0.78%, precious metal about 10g / t, At the same time, sulfur dioxide is generated.

[0070] A solution with a mass fraction of sulfuric acid of 30% was prepared as the reaction bottom solution; at the same time, a solution with a mass fraction of sulfuric acid of 90% was prepared as a leaching reaction solution. Fill the reaction bottom liquid of total kettle volume 40% in reactor; Add low matte and reaction leaching liquid in reactor simultaneously and react, and keep the consumption of sulfuric acid in the reactor consistent with the addition; Continuous feed reacts, until Stop feeding when the slurry in the reaction kettle reaches 80% of the total kettle volume, continue the reaction for 1 hour, and collect the hydrogen sulfide gas generated during the reaction.

[0071] After the...

Embodiment 2

[0074] Copper-nickel sulfide ore is smelted with matte to obtain low-matte nickel. The main element content is: Ni 13.25%, Cu 8.32%, Fe38.44%, Co 0.64%, precious metal about 8g / t, and sulfur dioxide is generated at the same time.

[0075] A solution with a mass fraction of sulfuric acid of 40% was prepared as the reaction bottom solution; at the same time, a solution with a mass fraction of sulfuric acid of 85% was prepared as a leaching reaction solution. Fill the reaction bottom liquid of 45% of total kettle volume in reactor; Add low matte nickel and reaction leaching solution in reactor simultaneously and react, and maintain the consumption of sulfuric acid in the reactor consistent with the addition; Continuous feed reacts, until Stop feeding when the slurry in the reaction kettle reaches 80% of the total kettle volume, continue the reaction for 1.5h, and collect the hydrogen sulfide gas generated during the reaction.

[0076] After the reaction is completed, the slurry i...

Embodiment 3

[0079] Copper-nickel sulfide ore is smelted with matte to obtain low nickel matte. The main element content is: Ni 16.55%, Cu 10.32%, Fe 33.44%, Co 0.34%, precious metal about 11g / t, and sulfur dioxide is formed at the same time.

[0080] A solution with a mass fraction of sulfuric acid of 20% was prepared as the reaction bottom solution; at the same time, a solution with a mass fraction of sulfuric acid of 60% was prepared as a leaching reaction solution. Fill the reaction bottom liquid of total still volume 30% in reactor; Add low matte nickel and reaction leaching liquid in reactor simultaneously and react, and keep the consumption of sulfuric acid in the reactor consistent with the addition; Continuous feed reacts, until Stop feeding when the slurry in the reaction kettle reaches 80% of the total kettle volume, continue the reaction for 0.5h, and collect the hydrogen sulfide gas generated during the reaction.

[0081] After the reaction is completed, the slurry is cooled t...

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Abstract

The invention provides a method and system for recovering main associated elements from copper-nickel sulfide ore. The method comprises the following steps: 1, continuously adding low-grade nickel matte and a leaching reaction solution into a reaction base solution, carrying out selective leaching, and collecting hydrogen sulfide gas, a first leaching solution and a first leaching residue, wherein the leaching reaction liquid is sulfuric acid with the mass fraction being 60-95%; 2, adding water into the first leaching residue for dissolving the first leaching slag, and collecting a second leaching solution and a second leaching residue; and 3, removing iron from the second leaching solution, collecting an iron-removed solution used for extracting nickel and cobalt and an iron-removed residue used for iron making, and / or sending the second leaching residue to a copper smelting device for smelting to obtain copper and noble metal. According to the method, deep separation of the nickel and the copper can be realized, and recovery of the nickel, the copper, the cobalt, the noble metal and sulfur can be effectively realized. The method is simple in process, short in flow and high in efficiency, is a clean and efficient element recovery process and is easy for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, and more specifically, to a method and system for recovering main and associated elements from copper-nickel sulfide ore. Background technique [0002] Nickel is an important strategic metal widely used in national defense, aerospace, transportation, petrochemical, energy and other fields. A considerable number of nickel ores are sulfide ores, associated with copper, cobalt and precious metals (gold, silver and platinum group metals), such as the Jinchuan copper-nickel mine in Gansu and the Kalatongke copper-nickel mine in Xinjiang. Therefore, it is necessary to consider the recovery of cobalt and precious metals while extracting nickel and copper. [0003] The traditional smelting process of copper-nickel sulfide ore is first to make matte smelting to enrich iron, nickel, cobalt and copper in the form of sulfide to form low nickel matte, and the associated precious metals ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/44C22B3/38C22B15/00C22B11/00C22B23/00
CPCC22B3/08C22B3/44C22B11/00C22B15/0028C22B23/043C22B23/0461C25C1/12C22B3/3844Y02P10/20
Inventor 赵中伟李永立
Owner CENT SOUTH UNIV
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