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a use so 2 Method for Strengthening Separation and Recovery of Copper Smelting Slag

A technology for strengthening separation and copper smelting slag, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of unfavorable industrial application and low utilization efficiency, achieve wide application range, improve utilization efficiency, and save processing costs Effect

Active Publication Date: 2019-11-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above research needs to add some additives to copper slag, and it is aimed at some specific slag, which is not conducive to industrial application, and SO 2 Utilization efficiency is not high, so it is necessary to develop an efficient and practical copper slag separation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The use of SO 2 The method of strengthening the separation and recovery of copper smelting slag is as follows:

[0020] In this example, the high concentration of SO 2 gas (SO 2 The mass concentration is 92.31%) into the corrosion-resistant pipeline set at the bottom of the 4t copper smelting slag slurry. The pipeline has micropores with a diameter of 6 μm, and the opening rate of the micropores is 92%, and the pipeline is spirally wound into a single-layer disc When the pipe is spirally coiled, the pipe spacing is 0.5m, the pressure in the pipe reaches 0.22MPa, the gas enters the copper smelting slag slurry through the micropores, and the larger bubbles pass through the copper smelting slag slurry at a speed of 500r / min Stirrer, sheared into smaller diameter bubbles, SO 2 Passing through MnO in slurry in copper smelting slag slurry 2 and TiO 2 Catalytic oxidation of rare metal oxides to form sulfuric acid, and leaching of valuable metals in the slurry t...

Embodiment 2

[0022] Example 2: The use of SO 2 The method of strengthening the separation and recovery of copper smelting slag is as follows:

[0023] High concentrations of SO 2 gas (SO 2 The mass concentration is 94.31%) into the corrosion-resistant pipeline set at the bottom of the 6.5t copper smelting slag slurry. There are micropores with a diameter of 8 μm on the pipeline. The opening rate of the micropores is 91%, and the pipeline is spirally wound into a single-layer circle Disk shape, when the pipe is spirally coiled, the distance between the pipes is 0.7m, the pressure in the pipe reaches 0.26MPa, the gas enters the copper smelting slag slurry through the micropores, and the larger bubbles pass through the copper smelting slag slurry at a speed of 800r / min stirrer, sheared into smaller diameter bubbles, SO 2 Passing through MnO in slurry in copper smelting slag slurry 2 and TiO 2 Catalytic oxidation of rare metal oxides to form sulfuric acid, and leaching of valuable metals...

Embodiment 3

[0025] Example 3: The use of SO 2 The method of strengthening the separation and recovery of copper smelting slag is as follows:

[0026] High concentrations of SO 2 gas (SO 2 The mass concentration is 95.11%) into the corrosion-resistant pipeline set at the bottom of the 5t copper smelting slag slurry. There are micropores with a diameter of 10 μm on the pipeline, and the opening rate of the micropores is 95%, and the pipeline is spirally wound into a single-layer disc When the pipe is spirally coiled, the pipe spacing is 0.9m, the pressure in the pipe reaches 0.3MPa, the gas enters the copper smelting slag slurry through the micropores, and the larger bubbles pass through the copper smelting slag slurry at a speed of 900r / min Stirrer, sheared into smaller diameter bubbles, SO 2 Passing through MnO in slurry in copper smelting slag slurry 2 and TiO 2 Catalytic oxidation of rare metal oxides to form sulfuric acid, and leaching of valuable metals in the slurry to form Fe ...

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Abstract

The invention discloses a method for recycling copper smelting slag through enhanced SO2 separation. The method comprises the following steps: inflating high-concentration SO2 gas into a corrosion-resistant pipe arranged at the bottom of a copper smelting slag slurry, wherein micropores are formed in the pipe, the pipe is spirally wound into a single-layer disc shape, the gas enters the copper smelting slag slurry through the micropores, relatively large bubbles are sheared into bubbles with the smaller diameter by a stirrer arranged in the copper smelting slag slurry, the SO2 forms sulfuric acid in the copper smelting slag slurry, and valuable metal in the copper smelting slag slurry is leached; then, adding a precipitant, heating a precipitate to form oxide, crushing, then separating outiron oxide by using a magnetic separator, reducing the iron oxide by CO at high temperature to generate crystalline elemental iron, performing acid leaching and electrolysis on the remaining precipitate, and recycling refined copper. According to the method, the utilization efficiency of the copper smelting slag is improved, principles of solid waste treatment: harmless, reductive and recycling are met, environment polluting risks caused by the copper smelting slag are effectively prevented, and economic effects are produced.

Description

technical field [0001] The invention belongs to the field of industrial solid waste treatment, and relates to a 2 Intensified separation and recovery of copper smelting slag technology, specifically a method of using high-concentration SO 2 To separate the valuable metals in the copper smelting slag, and then process to obtain the valuable metals. Background technique [0002] More than 90% of my country's refined copper production is produced by pyrotechnics. Copper smelting solid waste is mainly divided into smelting slag, smoke dust, acid sludge (lead filter cake, arsenic filter cake), anode sludge and water treatment sludge. The production of 1 ton of copper produces about 2.2~3 tons of slag. In copper smelting operations, the molten slag is often stored in the open air after water quenching. The main phase of water quenched copper slag is an amorphous glassy phase, which also contains fayalite, bornite, magnetite and other minerals. phase structure. Copper slag cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C21B13/00C22B15/14C25C1/12C01B17/74
CPCC01B17/74C21B13/0073C22B7/001C22B7/006C22B7/007C22B7/04C22B15/0071C22B15/0089C25C1/12Y02P10/134Y02P10/20
Inventor 孙鑫郝星光李建锡宁平李凯王驰赵晓敏陈潇
Owner KUNMING UNIV OF SCI & TECH