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Method for diluting copper and nickel concentrate smelting slag

A technology for smelting slag and depleting copper, which is applied in the field of pyrometallurgy of copper and nickel concentrate, can solve the problems of slag solidification, slag layer temperature imbalance, and unstable operation, etc., to simplify the process, reduce power consumption, and prolong Effect of Furnace Life

Inactive Publication Date: 2011-12-28
王萍 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this DC depletion method also has defects. The temperature of the slag layer in the entire molten pool is unbalanced, that is, the thermal field generated by the vertical arc between a single positive electrode and the furnace bottom decays radially to the surrounding direction, and the part far away from the DC arc Slag solidification is prone to occur, hindering the flow of sunken matte between the positive electrodes
The height of the matte surface in the whole furnace is inconsistent, which makes it difficult to discharge the matte
[0005] The direct current electric furnace depletion method invented by Huang Xiansheng et al., although the effect is better, the copper content in the slag can reach below 0.5%, which meets the requirement of discarding slag, but the operation is not stable enough, and it is difficult to discharge matte copper

Method used

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  • Method for diluting copper and nickel concentrate smelting slag
  • Method for diluting copper and nickel concentrate smelting slag
  • Method for diluting copper and nickel concentrate smelting slag

Examples

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Effect test

Embodiment 1

[0048] An electric furnace for depleted copper-nickel concentrate smelting slag adopts two liftable graphite electrodes inserted into the melt in the furnace body 11 of the depleted electric furnace through electrode holes. The high-voltage AC power supply 1 is sent to the primary side of the electric furnace transformer 2, and the secondary side of the transformer 2 is connected to the rectification device 3 to rectify the three-phase AC power into 60-200 V DC. The positive pole of the DC power supply is connected to an annealed copper wire 8 and connected to a liftable positive graphite electrode 10 of the electric furnace through the positive pole DC switch 4 and the positive pole DC bus bar 6 . The negative pole of the DC power supply is connected to an annealed copper wire 8 and received on a negative pole liftable graphite electrode 9 of the electric furnace through the negative pole DC switch 5 and the negative pole DC bus bar 7 .

[0049]The DC current passes through t...

Embodiment 2

[0051] An electric furnace for depleted copper-nickel concentrate smelting slag, three liftable graphite electrodes are inserted into the melt in the furnace body 11 of the depleted electric furnace through electrode holes. The high-voltage AC power supply 1 is sent to the primary side of the electric furnace transformer 2, and the secondary side of the transformer 2 is connected to the rectification device 3 to rectify the three-phase AC power into 60-200 V DC. The positive pole of the DC power supply is connected to the annealed copper wire 8 and connected to two liftable positive graphite electrodes 10 of the electric furnace through the positive pole DC switch 4 and the positive pole DC bus bar 6 . The negative pole of the DC power supply is connected to an annealed copper wire 8 and received on a negative pole liftable graphite electrode 9 of the electric furnace through the negative pole DC switch 5 and the negative pole DC bus bar 7 .

[0052] The DC current passes thro...

Embodiment 3

[0055] An electric furnace for depleted copper-nickel concentrate smelting slag, four movable graphite electrodes are inserted into the melt in the furnace body 11 of the depleted electric furnace through electrode holes. The high-voltage AC power supply 1 is sent to the primary side of the electric furnace transformer 2, and the secondary side of the transformer 2 is connected to the rectification device 3 to rectify the three-phase AC power into 60-200 V DC. The positive pole of the DC power supply is connected to the annealed copper wire 8 and connected to two liftable positive graphite electrodes 10 of the electric furnace through the positive pole DC switch 4 and the positive pole DC bus bar 6 . The negative pole of the DC power supply is connected to the annealed copper wire 8 through the negative pole DC switch 5 and the negative pole DC bus bar 7, and is connected to the two negative poles of the electric furnace that can be lifted and lowered graphite electrodes 9. Tw...

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PUM

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Abstract

The invention discloses a method for diluting copper and nickel concentrate smelting slag, and relates to a method for smelting copper and nickel concentrate by fire. The copper and nickel concentrate smelting slag is diluted and smelted by adopting a direct-current electric furnace. The method is characterized in that positive and negative electrodes of the direct-current diluting electric furnace for smelting are vertically inserted into a slag layer in the furnace from the upper part of the direct-current electric furnace to perform diluting and smelting. The method of the invention effectively simplifies the process of diluting the slag, reduces power consumption and prolongs the service life of the furnace; and the final slag contains about 0.45 percent of copper. The method meets the requirement of direct discharge, and fulfills the purposes of improving the diluting speed and saving the energy consumption.

Description

technical field [0001] A method for depleting copper-nickel concentrate smelting slag relates to a copper and nickel concentrate pyrometallurgy method. Background technique [0002] Copper and nickel concentrates will produce a large amount of slag with the formation of copper-nickel matte during the pyrometallurgy process. The slag of various modern enhanced smelting methods usually contains high copper (0.6% to 4%). In order to increase the recovery rate of copper and nickel smelting, it is necessary to further deplete the slag, reduce the content of copper and nickel in the slag, and increase the recovery rate of smelting. [0003] There are several ways to deplete the smelting slag in the modern copper-nickel pyrometallurgy process in the world: slow cooling flotation method: this method has a long process, although the final slag contains 0.4% copper, it needs to consume a lot of other Material, economic benefit is poor; AC electric furnace dilution method: the copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22B23/00
CPCY02P10/20
Inventor 王平黄俊华黄艳玲
Owner 王萍