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Method for oxidizing ferrous sulfide into elemental sulfur and ferric oxide

A technology of ferrous sulfide and elemental sulfur, which is applied in the field of chemical metallurgy, can solve the problems of temperature and oxidation time effects, technical solutions have not yet appeared, and oxidation time is difficult, etc., so as to improve practical value and economic value, uniform oxidation temperature and Stable and avoid the effect of flash explosion

Inactive Publication Date: 2016-12-21
刘慧南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Using the above-mentioned "roasting furnace dry method" process, it is difficult to control the temperature during the oxidation process, and it is difficult to meet the required oxidation time
In the process of oxidizing ferrous sulfide into elemental sulfur and iron oxide, the control of temperature and oxidation time will have a greater impact on the final ferrous sulfide oxidation into elemental sulfur and iron oxide.
[0004] In the process of oxidizing ferrous sulfide into elemental sulfur and iron oxide, there is no technical solution that can effectively control the oxidation temperature and meet the required oxidation time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for oxidizing ferrous sulfide into elemental sulfur and iron oxide. The method includes the following steps:

[0029] Water is added in ferrous sulfide, and it is made into slurry, and the mass percentage concentration of ferrous sulfide in the slurry is 65%;

[0030] Send the prepared slurry into an external inflatable mixing tank for oxidation treatment. The gas fed into the external inflatable mixing tank can be air, oxygen-enriched or pure oxygen; during the oxidation process, the external inflatable mixing tank can continuously The slurry is stirred and aerated to fully oxidize the slurry;

[0031] During the oxidation process, the temperature of the slurry is always controlled to be 70°C, and the oxidation time is controlled to be 10h; iron oxide and elemental sulfur are finally obtained.

Embodiment 2

[0033] This embodiment provides a method for oxidizing ferrous sulfide into elemental sulfur and iron oxide. The method includes the following steps:

[0034] Water is added in ferrous sulfide, and it is made into slurry, and the mass percent concentration of ferrous sulfide in the slurry is 79.9%;

[0035] Send the prepared slurry into the self-priming mixing tank for oxidation treatment, the oxygen-containing gas can enter the mixing tank under the negative pressure generated by the rotation of the impeller or rotor, and fully contact with the slurry;

[0036] During the oxidation process, the temperature of the slurry is always controlled to be 98°C, and the oxidation time is controlled to be 50h; iron oxide and elemental sulfur are finally obtained.

Embodiment 3

[0038] This embodiment provides a method for oxidizing ferrous sulfide into elemental sulfur and iron oxide. The method includes the following steps:

[0039] Water is added in ferrous sulfide, and it is made into slurry, and the mass percent concentration of ferrous sulfide in the slurry is 75%;

[0040] The prepared slurry is sent to an external air-filled flotation machine for oxidation treatment. During the oxidation process, the temperature of the slurry is always controlled at 75 ° C, and the oxidation time is controlled at 30 hours; iron oxide and elemental sulfur are finally obtained.

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PUM

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Abstract

The invention provides a method for oxidizing ferrous sulfide into elemental sulfur and ferric oxide. The method comprises the following steps of adding water to the ferrous sulfide, and preparing a sizing agent, wherein the mass percentage concentration of the ferrous sulfide is 1-79.9%; performing oxidation treatment on the sizing agent, wherein the oxidizing time is 0.3-50h, sufficiently mixing the sizing agent in an oxidation process, and always controlling the temperature of the sizing agent to be 60-99.9 DEG C; and preparing the ferric oxide and the elemental sulfur. The technical scheme provided by the invention has the advantages of being low in cost, and developed in used equipment, and solves the problem that the temperature in the oxidation technology process of the ferrous sulfide is difficult to control. The used equipment can meet time requirements required for oxidization of the ferrous sulfide, and the method has high use values and high economic values.

Description

technical field [0001] The invention relates to a method for oxidizing ferrous sulfide into elemental sulfur and iron oxide, belonging to the field of chemical metallurgy. Background technique [0002] CN105084323A discloses "a system and method for producing sulfur and iron oxide from pyrite", which records a method for oxidizing ferrous sulfide into elemental sulfur and iron oxide, which adopts the "roasting furnace dry method" process for sulfidation Ferrous iron is oxidized. [0003] With the above-mentioned "roasting furnace dry method" process, it is difficult to control the temperature during the oxidation process, and it is difficult to meet the required oxidation time. In the process of oxidizing ferrous sulfide into elemental sulfur and iron oxide, the control of temperature and oxidation time will have a greater impact on the final oxidation of ferrous sulfide into elemental sulfur and iron oxide. [0004] In the process of oxidizing ferrous sulfide into element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/06C01G49/06
CPCC01B17/06C01G49/06
Inventor 刘慧南
Owner 刘慧南
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