Method and equipment for recovering arsenic from titanium-arsenic slag

A technology for recovering arsenic and arsenic slag, which is applied in the direction of improving process efficiency, etc., can solve problems such as the need for a large number of processing equipment, failure to achieve harmless and resource utilization of arsenic, complex process flow, etc., to achieve no environmental pollution, Solve the problem of harmlessness and resource recycling, and the effect of simple process

Active Publication Date: 2020-06-19
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires a lot of equipment for the treatment of titanium arsenic slag, the

Method used

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  • Method and equipment for recovering arsenic from titanium-arsenic slag
  • Method and equipment for recovering arsenic from titanium-arsenic slag
  • Method and equipment for recovering arsenic from titanium-arsenic slag

Examples

Experimental program
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Embodiment 1

[0042] Such as figure 1 As shown, this embodiment provides a device for recovering elemental arsenic from titanium arsenic slag, which includes a pyrolysis device A, a reduction device B, and a condensation device C connected in sequence.

[0043] Pyrolysis device A comprises pyrolysis device furnace cover 2, pyrolysis furnace cavity 3, pyrolysis device shell 4, pyrolysis device insulation layer 5, pyrolysis device electric heating layer 6 and pyrolysis device heating control cabinet 7; A pyrolysis device electric heating layer 6 is arranged around and at the bottom of the outside of the pyrolysis furnace chamber 3 for heating the pyrolysis furnace chamber 3, and a pyrolysis device is arranged between the pyrolysis device electric heating layer 6 and the pyrolysis device shell 4 The device insulation layer 5 is used for the heat preservation of the pyrolysis furnace chamber 3, and an air inlet 1 is provided on the furnace cover 2 of the pyrolysis device so that a protective a...

Embodiment 2

[0054] The chemical composition and electron microscope energy spectrum ( image 3 and Figure 4 ) analysis is shown in Table 1.

[0055] The chemical composition of the titanium arsenic slag in the embodiment 2 of table 1

[0056]

[0057] The method for reclaiming arsenic from titanium arsenic slag in this embodiment: adding titanium arsenic slag in the pyrolysis furnace cavity (the titanium arsenic slag material is not less than 2 / 3 of the pyrolysis furnace cavity volume and cannot exceed the pyrolysis furnace cavity 3 / 4 of the volume), and at the same time, carbon black is added to the reduction furnace chamber (the volume of carbon is not less than 2 / 3 of the volume of the reduction furnace chamber and cannot exceed 3 / 4 of the volume of the reduction furnace chamber), and then heat Put the cover of the pyrolysis device on the cover of the furnace cavity, and cover the cover of the reduction device, and seal it with bolts; adjust the reaction temperature of the heatin...

Embodiment 3

[0059] The chemical composition of the titanium arsenic slag involved in this example is shown in Table 2.

[0060] The chemical composition of the titanium arsenic slag in the embodiment 3 of table 2

[0061]

[0062] The method for reclaiming arsenic from titanium arsenic slag in this embodiment: adding titanium arsenic slag in the pyrolysis furnace cavity (the titanium arsenic slag material is not less than 2 / 3 of the pyrolysis furnace cavity volume and cannot exceed the pyrolysis furnace cavity 3 / 4 of the volume), and at the same time, carbon black is added to the reduction furnace chamber (the volume of carbon is not less than 2 / 3 of the volume of the reduction furnace chamber and cannot exceed 3 / 4 of the volume of the reduction furnace chamber), and then heat Put the cover of the pyrolysis device on the cover of the furnace chamber, and cover the cover of the reduction device, and seal it with bolts; adjust the reaction temperature of the heating control cabinet of th...

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Abstract

The invention discloses a method for recovering arsenic from titanium-arsenic slag. The method comprises the following steps of (1) pyrolyzing the titanium-arsenic slag to obtain arsenic oxide steam,wherein the pyrolysis temperature ranges from 700 DEG C to 1200 DEG C; (2) reducing the arsenic oxide steam to obtain arsenic steam; and (3) condensing the arsenic vapor to obtain elemental arsenic. The invention further discloses equipment for recovering arsenic from the titanium-arsenic slag. The equipment comprises a pyrolysis device, a reduction device and a condensation device, wherein the pyrolysis device comprises a pyrolysis furnace chamber, the reduction device comprises a reduction furnace chamber, and the condensation device comprises a condensation furnace chamber; the top of the pyrolysis furnace chamber is in communication with the lower part of the reduction furnace chamber through a pipeline; the top of the reduction furnace chamber is in communication with the condensationfurnace chamber through a pipeline. According to the method, arsenic in the titanium-arsenic slag is reduced into an elemental arsenic product under the process condition of a short process, and theprocess and the equipment provide a technical basis for arsenic removal of the copper electrolyte and short-process cyclic utilization of the titanium-arsenic slag.

Description

technical field [0001] The invention belongs to the technical field of solid waste recovery and utilization, and in particular relates to a method and equipment for recovering arsenic from titanium arsenic slag. Background technique [0002] In recent years, with the development of the world economy and the improvement of the level of science and technology, my country's copper production and consumption have greatly increased. From 2000 to 2019, my country's copper production increased from 1.3258 million tons to 9.784 million tons. With the gradual depletion of high-grade and easy-to-mine copper resources, the grade of copper concentrate continues to decrease and the impurity content gradually increases, so arsenic accumulates in the electrolyte, and the concentration of arsenic in the electrolyte is as high as 48g L -1 . The potential of arsenic is close to that of copper. If the conditions are not properly controlled during the electrolysis process, it is easy to cause ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B5/10C22B5/16C22B30/04
CPCC22B7/001C22B5/10C22B5/16C22B30/04Y02P10/20
Inventor 田磊徐志峰曹才放杨亮吴艳新严康龚傲谌田雨
Owner JIANGXI UNIV OF SCI & TECH
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