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Harmless treatment and high value utilization method for copper-containing sludge

A harmless treatment, copper sludge technology, applied in the direction of process efficiency improvement, photographic technology, instruments, etc., can solve the problems of large environmental pollution, poor washing effect, difficult solid-liquid separation, etc., to reduce complex processes and avoid Colloid formation, good dehydration performance

Active Publication Date: 2017-06-13
HUNAN AIGE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two methods have high energy consumption, great environmental pollution and are not suitable for the treatment of low-content heavy metal sludge
[0004] (2) chemical treatment method, patent CN100402676C discloses a kind of " method for recovering valuable metals from electroplating sludge ", electroplating sludge is leached out valuable metals with acid, and sodium sulfide is added to the leaching solution to deposit copper to obtain copper sulfide, but acid High consumption, extremely difficult solid-liquid separation, poor washing effect, low total recovery rate of copper
However, in the harmless treatment process of the above-mentioned patents, there is still a problem that organic matter inhibits the growth of microorganisms

Method used

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  • Harmless treatment and high value utilization method for copper-containing sludge
  • Harmless treatment and high value utilization method for copper-containing sludge
  • Harmless treatment and high value utilization method for copper-containing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The copper-containing sludge produced in the sewage treatment process of a printed circuit board enterprise in Hunan has a water content of 75% after pressure filtration, and its main components include a mixture of copper, iron, calcium hydroxide and sulfate. It contains a small amount of quartz, copper sulfide, and iron sulfide. The main element analysis results of the copper-containing sludge are shown in Table 1-1.

[0056] Table 1-1: Analysis results of main elements of copper-containing sludge on dry basis in Example 1

[0057] element Cu Fe Ca Si Al Ni Zn mn Cr Pb sn content(%) 9.45 25.33 8.42 0.5 0.02 0.003 0.044 0.07 0.015 0.001 0.037

[0058] a kind of like figure 2 The method for harmless treatment and high-value utilization of copper-containing sludge of the present invention includes the following steps:

[0059] (1) Pretreatment of copper-containing sludge: Get 1kg of copper-containing sludge and place i...

Embodiment 2

[0073] The copper-containing sludge produced in the sewage treatment process of a surface treatment company in Jiangsu has a water content of 68% after pressure filtration. The main components are shown in Table 2-1, and the copper phase distribution is shown in Table 2-2.

[0074] Table 2-1: Analysis results of main elements of copper-containing sludge on dry basis in Example 2

[0075] element Cu Fe Ca Si Al Mg mn Na Ni Pb Zn Cr content(%) 14 19.05 12.16 0.026 0.227 1.578 0.21 0.235 0.089 0.002 0.001 0.001

[0076] Table 2-2: Phase distribution of dry base copper in Example 2

[0077] Phase free copper oxide bound copper oxide native copper sulfide secondary copper sulfide total copper content(%) 8.94 5 0.01 0.05 14 Proportion(%) 63.86 35.71 0.07 0.36 100

[0078] a kind of like figure 2 The method for harmless treatment and high-value utilization of copper-containing sludge o...

Embodiment 3

[0093] The copper-containing acidic water of a printed circuit board enterprise in Guangdong precipitated most of the heavy metals by lime precipitation, and the water content of the settled copper-containing sludge was 65% after pressure filtration. The main components are shown in Table 3-1, and the phase distribution of copper As shown in Table 3-2.

[0094] Table 3-1: Analysis results of main elements of copper-containing sludge on dry basis in Example 3

[0095]

[0096] Table 3-2: Phase distribution of dry base copper in Example 3

[0097] Phase free copper oxide bound copper oxide native copper sulfide secondary copper sulfide total copper content(%) 5.14 3.5 0.24 3.77 12.65 Proportion(%) 40.63 27.67 1.90 29.80 100.00

[0098] a kind of like figure 2 The method for harmless treatment and high-value utilization of copper-containing sludge of the present invention includes the following steps:

[0099] (1) Pretreatment of...

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Abstract

The invention discloses a harmless treatment and high value utilization method for copper-containing sludge. A copper product is obtained after first-level leaching, second-level leaching and extracting electrodeposition. According to the method, ingenious coupling is conducted on two-level leaching of precipitated iron and the copper-containing sludge, the dewatering performance is good, the filtering performance is improved, the influence of impurities on a copper extracting agent is reduced, stable control over the copper extracting process is facilitated, the problem that the concentration of iron ions in a leaching agent of the high-iron copper-containing sludge is far higher than the concentration of copper ions is solved, the impurities in copper-rich liquid obtained after extraction are smaller, and high-quality cathode copper can be obtained more easily; two-level leaching is adopted, the inhibiting action of the high-concentration copper ions on ferrous sulfide oxidation microorganisms in the second-level leaching is reduced greatly after the first-level leaching, multiple kinds of copper in complex forms not easily leached in first-level leaching slag of the copper-containing sludge can be deeply leached and extracted through the microorganisms more easily within the short time, and the high value utilization of harmless treatment products of the copper-containing sludge is achieved.

Description

technical field [0001] The invention belongs to the field of harmless disposal and resource utilization of hazardous waste, and in particular relates to a method for harmless treatment and high-value utilization of copper-containing sludge. Background technique [0002] Copper-containing sludge is mainly the final product in the wastewater treatment process of surface treatment industry, printed circuit board industry, electroplating industry and wire and cable industry, which often contains a large amount of heavy metal hydroxides and sulfides, which is an unstable If it is not disposed of properly, it will easily cause serious pollution to soil or groundwater, and it is classified as hazardous waste. It is listed as HW17 and HW22 in the "National Hazardous Waste List (implemented from August 1, 2016)". Its collection, treatment, Storage, transportation, transfer, and disposal should follow the relevant national regulations on hazardous waste management. Since the metallic...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B3/18C22B3/30C25C1/12
CPCC22B3/18C22B7/007C22B15/0071C25C1/12C22B3/30Y02P10/20
Inventor 周洪波赵邵安周文博陈军辉秦荣钢
Owner HUNAN AIGE ENVIRONMENTAL PROTECTION TECH CO LTD
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