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Method for comprehensively recovering various valuable metals in copper slag floating copper tailings

A technology for valuable metals and copper tailings, applied in chemical instruments and methods, flotation, process efficiency improvement, etc., can solve problems such as inability to utilize copper slag resources, single type of valuable metals, waste of resources, etc., to achieve The effects of avoiding excessive deposition of soot, improving resource utilization, and reducing energy consumption

Active Publication Date: 2021-07-02
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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  • Method for comprehensively recovering various valuable metals in copper slag floating copper tailings
  • Method for comprehensively recovering various valuable metals in copper slag floating copper tailings
  • Method for comprehensively recovering various valuable metals in copper slag floating copper tailings

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Embodiment 1

[0059] Such as figure 1 , 2 As shown, a kind of comprehensive recovery method of multiple valuable metals in copper slag floating copper tailings of the present embodiment comprises the following steps:

[0060] Step 1. Direct Restore

[0061] The composite additive of calcium oxide and sodium carbonate (GaO:Na 2 CO 3 = 2) Mix 10% of the column with copper slag evenly and put it into a tube furnace, and feed a gas mixture of methane, hydrogen and argon for reduction roasting. The roasting temperature is 700°C, and the roasting time is 120min. The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are selected as 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 zinc and lead are recovered, and the lead-zinc grade of the dust obtained is above 30%, which can be used as raw materials for lead-zinc smelting;

[0062] Ste...

Embodiment 2

[0067] Such as figure 1 , 2 As shown, a kind of comprehensive recovery method of multiple valuable metals in copper slag floating copper tailings of the present embodiment comprises the following steps:

[0068] Step 1. Direct Restore

[0069] The composite additive of calcium oxide and sodium carbonate (GaO:Na 2 CO 3 = 1.5) The ratio of 15% is mixed evenly 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 800°C, the roasting time is 100min, the mixed gas The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are selected as 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 zinc and lead are recovered, and the lead-zinc grade of the dust obtained is above 30%, which can be used as raw materials f...

Embodiment 3

[0075] Such as figure 1 , 2 As shown, a kind of comprehensive recovery method of multiple valuable metals in copper slag floating copper tailings of the present embodiment comprises the following steps:

[0076] Step 1. Direct Restore

[0077] The composite additive of calcium oxide and sodium carbonate (GaO:Na 2 CO 3 = 2) Mix the 15% proportion with copper slag evenly, put it into the tube furnace, and feed the gas mixture of methane, hydrogen and argon to carry out reduction roasting, the roasting temperature is 900°C, the roasting time is 90min, the mixed gas The constant volume fraction of dry argon is 50%, the concentrations of methane and hydrogen used are selected as 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 zinc and lead are recovered, and the lead-zinc grade of the dust obtained is above 30%, which can be used as raw materials for lead-zinc sm...

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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 comprises the steps of direct reduction roasting, magnetic separation and reverse flotation. According to the method for comprehensively recovering the various valuable metals in the copper slag floating copper tailings provided by the invention, the mixed gas of methane, hydrogen and argon is introduced for direct reduction roasting, magnetite in the copper slag can be completely converted into metal iron, and a composite additive is matched for dissociating fayalite in the copper slag, so that the purpose of resourceful ore phase reconstruction is achieved; and a phase composition in the copper slag is improved, an iron phase in the slag is subjected to a decomposition reaction, and lead and zinc are gasified in the form of metal steam, so that the various valuable metals in the copper slag are comprehensively recycled. Meanwhile, roasting products are treated through magnetic separation and reverse flotation, so that the iron ore concentrate grade is effectively improved, the effective utilization rate of resources is high, the recycling process is simple, energy consumption is low, and high economic benefits are achieved.

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 combined processes to recover valuable metals in copper slag. Background technique [0002] Metallurgical slag refers to the solid waste discharged after valuable metals are smelted and extracted 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 oceans, accounting for about 0.01% of the earth. As a material, copper has been used in various forms in human society since ancient times, and has become an inseparable part of the development of human society. Copper smelting technology has matured, mainly divided into pyro-smelting and hydro-smelting, but 80% of the world's copper comes from pyro-smelting, and hydro-smelting is not widely used yet. Copper s...

Claims

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Application Information

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Patent Type & Authority Applications(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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