Curing method of copper sludge

A solidification method, copper sludge technology, applied in the field of energy chemistry, can solve the problems of occupying land resources, wasting useful value, etc., and achieve the effect of comprehensive utilization and considerable economic value

Active Publication Date: 2013-04-03
YUNNAN COPPER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the other hand, the large amount of metallurgical sludge produced every year by t...

Method used

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  • Curing method of copper sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: The solidification method of copper sludge is as follows:

[0025] (1) The copper sludge composition of a copper smelting plant used in this example is shown in Table 1, the Isa slag composition of a copper smelting plant is shown in Table 2, and the fly ash composition is shown in Table 3:

[0026] Table 1: Composition of copper sludge in a copper smelter

[0027] ingredients As S Zn Fe Sb Pb Bi Cu CD other % 9.44 4.65 2.08 1.93 0.64 0.22 0.05 0.02 - -

[0028] Table 2: Composition of Isa slag in a copper smelter

[0029] ingredients Cu S Fe CuO SiO 2 Pb Zn As Al 2 O 3 MgO % 9.47 4.17 35.36 2.56 24.18 0.45 1.93 0.09 3.90 1.40

[0030] Table 3: Fly Ash Composition

[0031] ingredients SiO 2 Al 2 O 3 Fe 2 O 3 CaO MgO loss % 59.47 27.98 6.33 4.11 0.98 3.70

[0032] (2) After the copper sludge was naturally air-dried ...

Embodiment 2

[0035] Example 2: The solidification method of copper sludge is as follows:

[0036] (1) The copper sludge of a certain copper smelting plant, the Isa slag of a certain copper smelting plant, and the fly ash components used in this example are the same as those of Example 1;

[0037] (2) After the copper sludge is naturally air-dried, pulverized and mixed, the sludge is subjected to microwave heating treatment at 600°C for 0.5h, and 20% copper sludge, 35% Isa slag, 20% Fly ash and ordinary Portland cement with a mass percentage of 25% are mixed, and the mixed grinding time is 25 minutes. During the mixed grinding process, 7% lime by weight of the mixture is added. After the mixed grinding, water and additives are added to the materials. The amount of cement and fly ash is 0.177% of the mass of cement and fly ash. Additives and water are added to the mixed and ground materials at the same time. The amount of additives added is 0.12% of the mass of the mixture, of which sodium...

Embodiment 3

[0040] Example 3: The solidification method of copper sludge is as follows:

[0041] (1) The copper sludge of a certain copper smelting plant, the Isa slag of a certain copper smelting plant, and the fly ash components used in this example are the same as those of Example 1;

[0042](2) After the copper sludge is naturally air-dried, pulverized and mixed, the sludge is subjected to microwave heating treatment at 400°C for 0.8h, and the copper sludge with a mass percentage of 30%, the Isa slag with a mass percentage of 20%, and the slag with a mass percentage of 35% Fly ash and ordinary Portland cement with a mass percentage of 15% were mixed and mixed and ground for 30 minutes. During the mixing and grinding process, 9% lime was added to the mixture. Water and additives were added to the material after mixing and grinding. The addition of water The amount is 0.2% of the mass of cement and fly ash, and the additive and water are added to the mixed and ground material at the s...

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Abstract

The invention discloses a curing method of copper sludge. The curing method comprises the following steps of: with the copper sludge, flyash, cement, Isa furnace slag and the like in the metallurgical industry as raw materials, preparing a finished product through processes such as blending-grinding, injection molding, forming and maintaining. With the adoption of the curing method, waste resources in the metallurgical industry are fully utilized, the problem of curing the copper sludge is solved, wastes can also be reused, and considerable economic value is brought.

Description

technical field [0001] The invention relates to a solidification technology of copper sludge, is a new technology for resource utilization of copper sludge in metallurgical industry, and belongs to the field of energy chemistry. Background technique [0002] The metallurgical industry produces a large amount of acidic wastewater in the production process. Lime neutralization and sedimentation are usually used for this kind of wastewater. Heavy metals are precipitated in the form of hydroxides, resulting in a large amount of mixed sludge containing Cu, Sn, and As. Since heavy metal hydroxides such as copper, nickel, zinc, and chromium in copper sludge are in an unstable state, if they are stacked arbitrarily, under the action of rainwater leaching, heavy metals may be dissolved again and pollute the soil or groundwater, causing environmental ecological damage. Therefore, the heavy metal sludge is generally classified as hazardous waste, so the harmless treatment and disposa...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B18/14
CPCY02W30/91
Inventor 祝星李辕成王华祁先进胡建杭魏永刚李孔斋
Owner YUNNAN COPPER CO LTD
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