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Method for recovering valuable metals from copper anode mud flotation tailings

A technology for flotation tailings and copper anode slime, which is applied in the direction of non-metallic elements, chemical instruments and methods, and process efficiency improvement, can solve the problems of increasing production costs in the copper smelting process, and achieve high direct recovery rate and efficient recovery , the effect of high metal removal rate

Inactive Publication Date: 2016-04-13
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Returning to the smelting process, this treatment method effectively recovers the valuable metals antimony, bismuth, and tellurium. The harmful impurity elements lead, bismuth, and arsenic continue to circulate and accumulate in the system, which increases the production cost of the entire copper smelting process, and the presence of precious metals gold and silver returns Refining loss

Method used

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  • Method for recovering valuable metals from copper anode mud flotation tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the method for recovering valuable metals from copper anode slime flotation tailings, its specific steps are as follows:

[0023] (1) First, the copper anode slime flotation tailings are reduced and smelted to obtain the reduced product, and then the reduced product is oxidized and blown to obtain noble lead and arsenic-containing antimony soot; the original smelting conditions are: add charcoal, and the carbon ratio is 1 : 1.2, the temperature is 1000°C, the smelting time is 2.5 hours; the oxidation blowing conditions are: feed oxygen enrichment, the flow rate is 0.2L / min, the temperature is 800°C, and the holding time is 0.5 hours;

[0024] (2) One-stage low-temperature vacuum distillation: The precious lead obtained in step (1) is subjected to a low-temperature vacuum distillation for 1.5 hours at a temperature of 500°C and a pressure of 35Pa. After the vacuum distillation stage is over, keep the vacuum pump and cooling water continuously w...

Embodiment 2

[0030] Such as figure 1 As shown, the method for recovering valuable metals from copper anode slime flotation tailings, its specific steps are as follows:

[0031] (1) First, the copper anode slime flotation tailings are reduced and smelted to obtain the reduced product, and then the reduced product is oxidized and blown to obtain noble lead and arsenic-containing antimony soot; the original smelting conditions are: add charcoal, and the carbon ratio is 1 : 0.5, the temperature is 1200°C, the melting time is 0.5 hours; the oxidation blowing conditions are: feed oxygen enrichment, the flow rate is 0.5L / min, the temperature is 900°C, and the holding time is 2.5 hours;

[0032] (2) One-stage low-temperature vacuum distillation: The precious lead obtained in step (1) is subjected to a low-temperature vacuum distillation for 2 hours at a temperature of 600°C and a pressure of 35 Pa. After the vacuum distillation stage is over, keep the vacuum pump and cooling water working continuo...

Embodiment 3

[0038] Such as figure 1 As shown, the method for recovering valuable metals from copper anode slime flotation tailings, its specific steps are as follows:

[0039] (1) First, 2000g of copper anode slime flotation tailings (copper anode slime flotation tailings include the following mass percentage components: Au0.01%, Ag0.02%, Cu<5%, Se10%, Te30%, Pb30%, As<5%, Sb5%, Bi20%) obtain reduction products by reduction smelting, and then oxidize the reduction products to obtain noble lead and arsenic-containing antimony soot; the original smelting conditions are: adding charcoal, carbon ratio The temperature is 1:2, the temperature is 1100°C, and the melting time is 3 hours; the oxidation blowing conditions are: feed oxygen enrichment, the flow rate is 0.1L / min, the temperature is 500°C, and the holding time is 3 hours;

[0040] (2) One-stage low-temperature vacuum distillation: The precious lead obtained in step (1) is subjected to a low-temperature vacuum distillation for 1 hour a...

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Abstract

The invention relates to a method for recovering valuable metals from copper anode mud flotation tailings and belongs to the technical field of thermometallurgy. The method comprises: firstly, performing retailoring on the copper anode mud flotation tailings to obtain a reduction product, and then performing oxidative blowing on the reduction product to obtain rich lead and arsenic and antimony containing soot; first-stage low-temperature vacuum distillation: performing primary low-temperature vacuum distillation on the obtained rich lead under the conditions of a temperature of 400-700 DEG C and a pressure of 1-100Pa for 1-3h, thereby obtaining secondary rich lead and a selenium-tellurium alloy; and second-stage high-temperature vacuum distillation: performing primary high-temperature vacuum distillation on the obtained secondary rich lead under the conditions of a temperature of 800-1200 DEG C and a pressure of 1-100Pa for 1-3h, thereby obtaining a lead-bismuth and a copper-gold-silver alloy. The method for recovering valuable metals from copper anode mud flotation tailings is safe and controllable in whole process flow, simple and convenient to operate, simple in equipment needed, free from three-waste emissions, and environment-friendly.

Description

technical field [0001] The invention relates to a method for recovering valuable metals from copper anode slime flotation tailings, belonging to the technical field of pyrometallurgy. Background technique [0002] Copper anode slime flotation tailings (referred to as flotation tailings) is the remaining tailings slag after copper anode slime has been decoppered and selenized, and precious metals have been flotation. Due to the complex composition of copper anode slime, flotation tailings usually contain many elements such as Au, Ag, Cu, Se, Te, Pb, As, Sb, Bi, Fe, Ni, S, platinum group elements, etc. Species' form of existence. The content of precious metals in flotation tailings is generally much higher than that of mined precious metal ores, but compared with copper anode slime, the content of precious metals in flotation tailings is low, and the process of recovering precious metals is long, energy consumption is high, and metals are collected directly. low rate. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B5/16C22B11/02C22B15/00C22B13/02C22B30/06C22B30/02C01B19/00
CPCC22B5/16C22B7/001C22B11/021C22B13/025C22B15/0052C22B30/02C22B30/06C01B19/00Y02P10/20
Inventor 蒋文龙杨斌杨崇方刘大春徐宝强熊恒李一夫刘繁松戴永年
Owner KUNMING UNIV OF SCI & TECH
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