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Method and device for extracting a metal from a slag containing the metal

A technology for extracting metals and slag, applied in lighting and heating equipment, etc., can solve problems such as limiting phase separation

Inactive Publication Date: 2010-06-16
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While dispersed metallic copper inclusions as reduction products of copper-like oxides together with a fraction of small matte inclusions limit phase separation and adequate copper extraction.

Method used

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  • Method and device for extracting a metal from a slag containing the metal
  • Method and device for extracting a metal from a slag containing the metal
  • Method and device for extracting a metal from a slag containing the metal

Examples

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example

[0079] The slag obtained from the smelting of the concentrate in the rapid smelting plant contains 4% Cu and 15% Fe 3 o 4 . All slag was drained in 3 hours and exported to a 9.5 MVA three-phase AC electric arc furnace 1 through a slagging tank. The slag output is 30t / h, that is, 90t is processed in each cycle. Coke consumption reaches about 8 kg / t and energy consumption reaches about 70 kWh / t, corresponding to an average power consumption of 6.3 MW. After one hour, the export of slag to the electric arc furnace starts, which lasts for 2 hours. Copper content 1.1% and Fe 3 o 4 The slag with a content of 7% is transferred to the DC arc furnace 2 with an ionization chamber through the slag discharge tank 8, which is four meters long and one meter wide. A reducing slagging furnace for semi-continuous slagging is shown in FIG. 2 . The slag flows through the reduction slagging furnace 2 continuously for two hours. When the slag level is one meter, the average residence time ...

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Abstract

The invention concerns a method for extracting a metal from a slag containing the metal, in which the liquefied metal-containing slag is heated in at least one arc furnace (1, 2). In order to developan improved method for extracting, in particular, copper from slag, the invention provides for the metal-containing slag to be heated in a first furnace (1) in the form of an AC or DC electric furnaceand for the melt from the first furnace (1) to be transferred to a second furnace (2) in the form of a DC electric furnace. The invention also concerns a device for extracting a metal from a slag containing the metal.

Description

technical field [0001] The invention relates to a method for extracting metals from metal-containing slags, wherein the molten metal-containing slag is heated in at least one electric arc furnace. Furthermore, the invention relates to a device for extracting metals from metal-containing slags. Background technique [0002] During the smelting of copper concentrate, matte and slag are produced. Slag contains both copper in molten form and mechanically fused ore inclusions. There are two main methods for slag removal: slag flotation after quenching, crushing and milling, and pyrometallurgical reduction of liquid slag. [0003] The pyrometallurgical slag removal method is divided into at least three variants, namely: [0004] 1) Reduction, slag preheating and precipitation by coke and electrodes in an AC electric arc furnace, [0005] 2) Injection of reducing agent in a horizontal cylindrical rotary kiln, for example in a teniente-cleaning furnace, [0006] 3) In a vertica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00F27B3/04
Inventor J·倥策R·德格尔D·博格瓦特A·沃茨奥克G·A·里韦罗斯·厄珠阿
Owner SMS DEMAG AG
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