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Method for utilization and harmless treatment of multi-metal material containing arsenic and indium

A harmless treatment, multi-metal technology, applied in photography technology, equipment, photography auxiliary technology, etc., can solve the problem that there is no comprehensive treatment method for multi-metal materials containing arsenic and indium, high sealing requirements for dust collection devices, and easy leakage of arsenic trioxide and other issues, to achieve the effect of comprehensive recycling and harmless, remarkable effect and good separation effect

Inactive Publication Date: 2012-07-11
CHENZHOU FENGYUE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above arsenic removal methods adopt the pyrotechnic process, which has high requirements for the sealing of the dust collection device, and the arsenic trioxide is easy to leak, which is easy to cause environmental pollution
[0005] Judging from the currently published literature, the treatment of multi-metal materials containing arsenic and indium can only be treated in a single way, either to recover the indium in the material, or to only treat the arsenic in the material. Comprehensive treatment method for polymetallic materials

Method used

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  • Method for utilization and harmless treatment of multi-metal material containing arsenic and indium
  • Method for utilization and harmless treatment of multi-metal material containing arsenic and indium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Raw material: soot, the composition is as follows

[0029] soot element

Zn

In

sn

As

Pb

h 2 o

Content (%)

7.74

2962(g / t)

10.57

8.99

43.5

0.1

[0030] Acidic leaching: Weigh 200g of soot into a beaker, add 120ml of sulfuric acid to 1000ml of water, MnO 2 15g. When the temperature of the water bath rises to 95°C, place the beaker in the water bath and stir at constant temperature for 5 hours. Final acid: 90g / L, filtered, respectively sampling test:

[0031] Lead dross

Pb

sn

In

As

Zn

dry residue

Content (%)

44.46

10.7

451(g / t)

0.51

2.41

193.7

[0032] Filtrate result:

[0033] filtrate

Pb

sn

In

As

Zn

Volume ml

Content (g / L)

0.05

0.42

520(mg / L)

17.5

11.17

970

[0034] Hydrolysis of indium precipitation:

[0035] Add 70 grams of c...

Embodiment 2

[0042] Raw materials: 2000 kg of soot,

[0043] soot element

Zn

In

sn

As

Pb

h 2 o

Content (%)

3.34

2066g / t

0

18.58

31.47

0.68

[0044] Acid leaching: at 15m 3 Add 10m of clean water to the reaction tank 3 , add 1000 kg of sulfuric acid to make the initial acid reach 150g / l, MnO 2 200 kg, heat up and stir, when the temperature reaches 95°C, keep stirring for 5 hours, and the final acid is 56g / l. Compression, sampling test respectively: get solution 9.8m 3 , 2683 kg of slag.

[0045] Lead dross

Pb

sn

In

As

Zn

h 2 o

Content (%)

31.63

0

252g / t

1.32

0.34

26.56

[0046] Filtrate result:

[0047] filtrate

Pb

sn

In

As

Zn

volume

Content (g / L)

0.06

0

375mg / L

35.2

0.65

9.8m 3

[0048] Hydrolysis of indium precipitation:

[0049]Add 450 k...

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Abstract

The invention discloses a method for utilization and harmless treatment of multi-metal material containing arsenic and indium, comprising the steps of: dissolving most of metals like arsenic and indium into the solution through hydrometallurgy while lead and stannum into the slag; then precipitating indium by means of hydrolysis; afterwards, leaching out the precipitated indium with hydrochloric acid to obtain indium-rich solution, and obtaining coarse indium product through replacement and smelting; finally adding alkali to the arsenic-containing solution to produce harmless ferrite. With the invention, the arsenic removal rate is greater than 93%; arsenic is well separated from the valued metals so that the arsenic content in the valued metal slag is less than 1%, which is convenient for reclamation of valued metals; moreover the arsenic slag formed is a general solid waste which is easy to dispose, and the waste water meets the requirement of first-grade discharge standard to realize comprehensive and harmless reclamation of the arsenic-containing materials.

Description

technical field [0001] The invention provides an environment-friendly hydrometallurgy technology, and specifically refers to a treatment method for polymetallic materials containing arsenic and indium. Background technique [0002] Arsenic is a non-metallic element, off-white, metallic luster crystal block, brittle and poisonous, especially arsenic trioxide commonly known as arsenic is more toxic. No matter what kind of metal sulfide ore contains a certain amount of arsenic sulfide, free arsenic is quite active. When heated to about 200°C in air, there will be fluorescence, and at 400°C, there will be a blue flame burning and form white arsenic oxide smoke. Free elements are easy to combine with fluorine and nitrogen, and react with most metals and non-metals under heating conditions. In the process of pyrometallurgy of lead and copper, arsenic and zinc, indium, lead, tin, copper and other metals volatilize into the smoke and dust. Over time, the content of arsenic and val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B58/00C22B3/08C22B3/10C22B3/46C25C1/22
CPCY02P10/20
Inventor 曹亮发
Owner CHENZHOU FENGYUE ENVIRONMENTAL PROTECTION TECH
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