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Recovery device and recovery method for recovering selenium from copper anode slime

A recovery device and copper anode slime technology, applied in the field of metallurgy, can solve the problems of high cost, complex process, large amount of waste water and waste residue, etc., and achieve the effect of reducing process cost and simplifying the process

Pending Publication Date: 2021-11-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has complex equipment, large consumption of chemicals, large amount of waste water, high investment cost, and it is difficult to realize large-scale industrialization.
[0005] In summary, the currently disclosed methods and equipment for selenium recovery from copper anode slime have problems such as complex process, high cost, large amount of waste water and waste residue, low selenium recovery rate, and low grade of crude selenium. It is urgent to develop an industrialized Applied and efficient method and device for recovering selenium from copper anode slime

Method used

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  • Recovery device and recovery method for recovering selenium from copper anode slime
  • Recovery device and recovery method for recovering selenium from copper anode slime
  • Recovery device and recovery method for recovering selenium from copper anode slime

Examples

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Effect test

Embodiment 1

[0059] Such as figure 1 As shown, the recovery device for reclaiming selenium from copper anode slime of the present embodiment includes:

[0060]Pretreatment system, used for crushing copper anode slime and uniformly mixing with sulfuric acid to obtain pretreated materials;

[0061] Roasting-purification system, used for roasting pretreated materials to generate flue gas containing selenium dioxide and sulfur dioxide, and dedusting and purifying the flue gas;

[0062] The absorption reduction system is used to absorb flue gas and simultaneously reduce selenium dioxide to obtain crude selenium;

[0063] The pretreatment system, roasting-purification system and synchronous absorption reduction system are connected in sequence.

[0064] In this embodiment, the roasting-purification system includes a roasting furnace 1 arranged horizontally. The roasting furnace 1 is provided with a feed port and a gas outlet. The side of the roasting furnace 1 near the feed port is provided wi...

Embodiment 2

[0079] The recovery device of this embodiment is the same as that of Embodiment 1.

[0080] The method for recovering selenium from copper anode slime utilizing the above-mentioned recovery device of the present embodiment comprises the following steps:

[0081] Add copper anode slime and sulfuric acid to the wet grinding device 9 at a volume-to-mass ratio of 0.7:1, open the valve at the discharge port after grinding for 4 hours, and add the mixture to the screw extrusion feeding device 10, and the screw extrusion feeding device 10 After being extruded and conveyed, the uniformly mixed slurry is transported to the roasting area 101, and the heating furnace jacket 2 is turned on to control the temperature in the furnace, and the temperature is controlled at 5 stages to stabilize at about 300°C, 390°C, 450°C, 570°C, and 650°C At the same time, open the terminal vacuum pump assembly 13, observe that the pressure in the negative pressure buffer tank is about -8000Pa, and control t...

Embodiment 3

[0083] The recovery device of this embodiment is the same as that of Embodiment 1.

[0084] The method for recovering selenium from copper anode slime utilizing the above-mentioned recovery device of the present embodiment comprises the following steps:

[0085] Add copper anode slime and sulfuric acid to the wet grinding device 9 at a volume-to-mass ratio of 2:1, open the outlet valve after grinding for 3 hours, and add the mixture to the screw extrusion conveying device 10, and the screw extruding conveying device 10 After being extruded and conveyed, the uniformly mixed slurry is transported to the roasting area 101, and the heating furnace jacket 2 is turned on to control the temperature in the furnace, and the 5-stage control temperature is stable at about 250°C, 350°C, 450°C, 585°C, and 620°C , and open the terminal vacuum pump assembly 13 at the same time, observe that the pressure in the negative pressure buffer tank is about -14000Pa, and control the ventilation rate ...

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Abstract

The invention discloses a recovery device for recovering selenium from copper anode slime. The recovery device comprises a pretreatment system for crushing copper anode slime and uniformly mixing with sulfuric acid to obtain a pretreated material; a roasting-purifying system for roasting the pretreated material to generate flue gas containing selenium dioxide and sulfur dioxide and carrying out dust removal and purification on the flue gas; and an absorption and reduction system for absorbing the flue gas and synchronously reducing selenium dioxide to obtain crude selenium. The pretreatment system, the roasting-purifying system and the synchronous absorption and reduction system are connected in sequence. The invention also provides a recovery method for recovering selenium from copper anode slime by using the recovery device. The recovery device and the recovery method for recovering selenium from copper anode slime can effectively solve the problems of complex process, high cost, low selenium recovery rate, low crude selenium grade and the like in the process of recovering selenium from anode slime, the final overall recovery rate of selenium can reach 99% or above, and the crude selenium grade reaches 98% or above.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a selenium recovery device and a recovery method. Background technique [0002] Selenium is one of the scattered metals and is widely used in metallurgy, glass, ceramics, electronics, solar energy, feed and other fields. For example, the largest use of selenium is as an antioxidant additive in the electrolytic manganese industry, and its consumption accounts for more than 60% of the total selenium consumption. In the glass industry, adding a small amount of selenium can change the optical properties and color of the glass. In the chemical industry, selenium is mainly used as an ingredient in pigments and as a substitute for vulcanizing agents in rubber production. With the development of science and technology, selenium is widely used in high-tech fields. The manufacture of semiconductor equipment, thermoelectric equipment, solar cells, laser devices, infrared ph...

Claims

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Application Information

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IPC IPC(8): C01B19/02
CPCC01B19/02C01P2006/80Y02P20/133Y02P10/20
Inventor 李栋乔晋玺许志鹏郭学益田庆华
Owner CENT SOUTH UNIV
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