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A method for comprehensively recovering various valuable metals in copper slag floating copper tailings

A valuable metal and copper tailing slag technology, applied in chemical instruments and methods, flotation, process efficiency improvement and other directions, can solve the problems of inability to utilize copper slag as a resource, single type of valuable metal, waste of resources, etc. Avoid excessive soot deposition, improve resource utilization, and reduce energy consumption

Active Publication Date: 2022-07-01
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the problem that when the existing copper slag is recycled, the types of valuable metals recovered are relatively single, and it is difficult to comprehensively recover valuable metal elements such as iron, zinc, and lead at the same time, which easily causes waste of resources, thereby failing to recycle The lack of effective resource utilization of copper slag provides a method for comprehensive recovery of various valuable metals in copper slag floating copper tailings

Method used

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  • A method for comprehensively recovering various valuable metals in copper slag floating copper tailings
  • A method for comprehensively recovering various valuable metals in copper slag floating copper tailings

Examples

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Effect test

Embodiment 1

[0059] like figure 1 , 2 As shown, a method for comprehensively recovering multiple valuable metals in copper slag floating copper tailings according to the present embodiment includes the following steps:

[0060] Step 1. Direct restore

[0061] The composite additive of calcium oxide and sodium carbonate (CaO:Na 2 CO 3 =2) The ratio of 10% is mixed with the copper slag and put into the tube furnace, and the gas mixture of methane, hydrogen and argon is introduced to carry out reduction roasting, the roasting temperature is 700 ℃, and the roasting time is 120min. The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are 5vol% and 45vol%, and the total flow rate of the mixed gas into the tube furnace is 800mL / min to remove zinc and lead in the slag. and other harmful impurities, and recover the zinc and lead, the obtained smoke dust has a lead and zinc grade of more than 30%, which can be used as raw materials for lead and zinc s...

Embodiment 2

[0067] like figure 1 , 2 As shown, a method for comprehensively recovering multiple valuable metals in copper slag floating copper tailings according to the present embodiment includes the following steps:

[0068] Step 1. Direct restore

[0069] The composite additive of calcium oxide and sodium carbonate (CaO:Na 2 CO 3 =1.5) The ratio of 15% is mixed with copper slag and put into a tube furnace, and the gas mixture of methane, hydrogen and argon is introduced to carry out reduction roasting, the roasting temperature is 800 ℃, and the roasting time is 100min. The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are 10vol% and 40vol%, and the total flow rate of the mixed gas into the tube furnace is 800mL / min to remove zinc and lead in the slag. and other harmful impurities, and the zinc and lead are recovered, and the obtained smoke dust has a lead-zinc grade of more than 30%, which can be used as raw materials for lead-zinc sm...

Embodiment 3

[0075] like figure 1 , 2 As shown, a method for comprehensively recovering multiple valuable metals in copper slag floating copper tailings according to the present embodiment includes the following steps:

[0076] Step 1. Direct restore

[0077] The composite additive of calcium oxide and sodium carbonate (CaO:Na 2 CO 3 =2) The ratio of 15% is mixed with copper slag and put into the tube furnace, and the gas mixture of methane, hydrogen and argon is introduced to carry out reduction roasting, the roasting temperature is 900 ℃, and the roasting time is 90min. The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are 15vol% and 35vol%, and the total flow rate of the mixed gas into the tube furnace is 700mL / min to remove zinc and lead in the slag. and other harmful impurities, and recover the zinc and lead, the obtained smoke dust has a lead and zinc grade of more than 30%, which can be used as raw materials for lead and zinc smelt...

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Abstract

The invention discloses a method for comprehensively recovering various valuable metals in copper slag floating copper tailings, and belongs to the technical field of metal element recovery. The method of the invention comprises the following steps: direct reduction roasting, magnetic separation and reverse flotation. In the present invention, the mixed gas of methane, hydrogen and argon can be directly reduced and roasted, so that all the magnetite in it can be converted into metallic iron, and the fayalite in it can be dissociated with the compound additive, so as to achieve the heavy mineralization of resources. The purpose of the structure is to improve the phase composition in the copper slag, so that the iron phase in the slag undergoes a decomposition reaction, and lead and zinc are gasified in the form of metal vapor, thereby realizing comprehensive recovery of various valuable metals in the copper slag. At the same time, the roasting products are processed by magnetic separation and reverse flotation, which can effectively improve the grade of iron concentrate, have high effective utilization rate of resources, simple recovery process, low energy consumption, and high economic benefits.

Description

technical field [0001] The invention belongs to the technical field of metal element recovery, and in particular relates to a method for comprehensively utilizing and recovering valuable metals in copper slag by a combined process. Background technique [0002] Metallurgical slag refers to the solid waste discharged after smelting and extracting valuable metals from metal-containing minerals or semi-finished products in metallurgical production. Copper slag is the solid waste left after copper ore smelting. Copper is a metal element widely stored in the earth's crust and ocean, accounting for about 0.01% of the earth. As a material, copper has been used in human society in various forms since ancient times and has become an inseparable part of the development of human society. Copper smelting technology has become mature, mainly divided into pyrometallurgy and hydrometallurgy, but 80% of the world's copper comes from pyrometallurgy, and hydrometallurgy is not widely used a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B1/02C22B19/20C22B19/30C22B13/02B03C1/30B03D1/018B03D101/00B03D101/02B03D101/04B03D101/06B03D103/04
CPCC22B7/04C22B7/002C22B1/02C22B19/30C22B19/20C22B13/025B03C1/30B03D1/018B03D2201/007B03D2201/02B03D2201/04B03D2201/06B03D2203/04Y02P10/20Y02P70/10
Inventor 雷鹰雍超李雨刘瑞杨皓月
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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