Treatment method for sulfur-containing leaching residues, and application thereof

A treatment method and leaching slag technology, which is applied in the field of metallurgy, can solve problems such as insufficient SO2 concentration, unfavorable recovery of valuable metals in leaching slag, and insufficient waste heat recovery efficiency, so as to achieve good energy saving effects, facilitate SO2 recovery, and improve waste heat recovery efficiency. Effect

Inactive Publication Date: 2018-11-06
CHINA NERIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such a treatment method is not conducive to the recovery and utilization of valuable metals in the leaching slag, and the SO in the flue gas 2 Insufficient concentration is not conducive to subsequent SO 2 recycling (e.g. acid production)
In addition, the waste heat recovery efficiency of the existing treatment method is insufficient, and the energy saving effect is not good enough

Method used

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  • Treatment method for sulfur-containing leaching residues, and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a treatment method for sulfur-containing leaching slag, and the composition of the sulfur-containing leaching slag to be treated is shown in the following table:

[0058] composition

Zn

Pb

S

Fe

Ag(g / t)

As

wt%

17.15

1.14

57.40

5.25

0.17

0.02

[0059] The processing method is as follows:

[0060] The oxygen in the oxygen tank is regulated by the oxygen concentration control system and enters the air-oxygen mixer. The air-oxygen mixer mixes air and oxygen to form a mixed gas. The working pressure of the oxygen tank is 1.0MPa.

[0061] The oxygen concentration control system of this embodiment includes a flow meter for detecting the flow of oxygen, a pressure gauge for detecting the pressure of oxygen, a pressure reducing valve for reducing the pressure of oxygen, and a regulating valve for adjusting the flow of oxygen. After the oxygen is decompressed by the pressure reducing valve, the...

Embodiment 2

[0069] This embodiment provides a treatment method for sulfur-containing leaching slag, and the composition of the sulfur-containing leaching slag to be treated is shown in the following table:

[0070] composition

Zn

Pb

S

Fe

Ag(g / t)

As

wt%

17.15

1.14

57.40

5.25

0.17

0.02

[0071] The processing method is as follows:

[0072] The oxygen in the oxygen tank is adjusted by the oxygen concentration control system and then enters the air-oxygen mixer. The air-oxygen mixer mixes air and oxygen to form a mixed gas. The working pressure of the oxygen tank is 1.3MPa.

[0073] The oxygen concentration control system of this embodiment includes a flow meter for detecting the flow of oxygen, a pressure gauge for detecting the pressure of oxygen, a pressure reducing valve for reducing the pressure of oxygen, and a regulating valve for adjusting the flow of oxygen. After the oxygen is decompressed by the pressure reducing valve,...

Embodiment 3

[0081] This embodiment provides a treatment method for sulfur-containing leaching slag, and the composition of the sulfur-containing leaching slag to be treated is shown in the following table:

[0082] composition

Zn

Pb

S

Fe

Ag(g / t)

As

wt%

17.15

1.14

57.40

5.25

0.17

0.02

[0083] The processing method is as follows:

[0084] The oxygen in the oxygen tank is adjusted by the oxygen concentration control system and then enters the air-oxygen mixer. The air-oxygen mixer mixes air and oxygen to form a mixed gas. The working pressure of the oxygen tank is 1.6MPa.

[0085] The oxygen concentration control system of this embodiment includes a flow meter for detecting the flow of oxygen, a pressure gauge for detecting the pressure of oxygen, a pressure reducing valve for reducing the pressure of oxygen, and a regulating valve for adjusting the flow of oxygen. After the oxygen is decompressed by the pressure reducing valve,...

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Abstract

The invention relates to the field of metallurgy, and discloses a treatment method for sulfur-containing leaching residues, and an application thereof. The treatment method for sulfur-containing leaching residues is characterized in that the sulfur-containing leaching residues which are in a fluidized state in a mixed gas are calcined, and the mixed gas comprises above 22 volume% of oxygen. The method can be used to make valuable metals in the sulfur-containing leaching residues enriched in calcine in order to achieve reuse. Combustion in an oxygen-rich atmosphere increases the calcination efficiency and makes the calcination complete and thorough. High oxygen content makes smoke obtained after the calcinations of the same amount of the sulfur-containing leaching residues have a small total amount and improves the concentration of SO2 in the smoke, so the SO2 can be easily recovered by an acid preparation system, and the investment and the energy for the acid preparation are reduced. The treatment method also improves the recovery efficiency of waste heat, so the steam output is increased, and the steam provides a heat source for production or life, thereby the energy saving effectis good. The treatment method for sulfur-containing leaching residues can be applied to a hydrometallurgical process.

Description

technical field [0001] The invention relates to the field of metallurgy, and in particular to a treatment method and application of sulfur-containing leaching slag. Background technique [0002] The composition of the leaching slag obtained in hydrometallurgy leaching is relatively complex, and part of the leaching slag has a higher content of sulfur and more valuable metals. A common treatment method is to add sulfur-containing leached slag to a fuming furnace or a rotary kiln for treatment. However, such a treatment method is not conducive to the recovery and utilization of valuable metals in the leaching slag, and the SO in the flue gas 2 Insufficient concentration is not conducive to subsequent SO 2 Recycling (such as acid production). In addition, the waste heat recovery efficiency of the existing treatment method is insufficient, and the energy saving effect is not good enough. Contents of the invention [0003] The object of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/10C22B19/30C22B13/00C22B11/00C22B30/04
CPCC22B1/10C22B7/007C22B7/04C22B11/044C22B13/045C22B19/22C22B19/30C22B30/04Y02P10/20
Inventor 曹霞黄卫华姜凯刘涛熊小鹏廖祚洗
Owner CHINA NERIN ENG
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