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A copper-lead-zinc smelting wastewater sludge depolymerization dispersant and preparation method thereof

A wastewater sludge and zinc smelting technology, which is applied in metallurgical wastewater treatment, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of harmful components escaping, mixing and stirring difficulties, etc., and achieves a convenient and efficient preparation method. Improved cohesive properties, easy-to-achieve effects

Active Publication Date: 2021-02-12
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above sludge characteristics make it very difficult to mix and stir this type of sludge with other materials in the process of resource utilization; on the other hand, the composition of this type of acidic wastewater sludge is mainly CaSO 4 2H 2 O, drying and dehydration will cause changes in crystal water to form hemihydrate gypsum, and high temperature drying will easily cause harmful components to escape

Method used

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  • A copper-lead-zinc smelting wastewater sludge depolymerization dispersant and preparation method thereof
  • A copper-lead-zinc smelting wastewater sludge depolymerization dispersant and preparation method thereof
  • A copper-lead-zinc smelting wastewater sludge depolymerization dispersant and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] The copper-lead-zinc smelting wastewater sludge depolymerization dispersant provided in this example is prepared by the following method:

[0039] (1) Crush various solid materials to ≤1mm, accurately weigh according to the composition ratio, sodium lignosulfonate 4.6g, acrylamide 8.5g, allyl sodium sulfonate 8.8g, ammonium persulfate 0.005g, distilled water 72.1g, each material accurately weighed is placed in the reaction vessel;

[0040] (2) Turn on the agitator and turn on the heating button of the reactor at the same time, control the reaction temperature to 60°C, and keep stirring for 8 minutes;

[0041] (3) After stirring for a certain time, slowly add 5.5g of acrylic acid into the reactor, measure the pH value of the solution at this time to be 6, and continue stirring for 3 minutes;

[0042] (4) After stirring for 3 minutes, continue to raise the temperature so that the temperature of the reactor is 80°C, and continue to stir for a reaction time of 4 hours. Aft...

Embodiment 2

[0045] The copper-lead-zinc smelting wastewater sludge depolymerization dispersant provided in this example is prepared by the following method:

[0046] (1) Crush various solid materials to ≤1mm, accurately weigh according to the composition ratio, sodium lignosulfonate 6.5g, acrylamide 7.0g, allyl sodium sulfonate 8.8g, ammonium persulfate 0.0061g, distilled water 68.29g, each material accurately weighed is placed in the reaction vessel;

[0047] (2) Turn on the agitator and turn on the heating button of the reactor at the same time, control the reaction temperature to 67°C, and keep stirring for 7 minutes;

[0048] (3) After stirring for a certain time, slowly add 6.1g of acrylic acid into the reactor, measure the pH value of the solution at this time to be 7, and continue stirring for 2 minutes;

[0049] (4) After stirring for 2 minutes, continue to raise the temperature so that the temperature of the reactor is 95°C, and continue to stir for 4.5 hours. After the reaction...

Embodiment 3

[0052] The copper-lead-zinc smelting wastewater sludge depolymerization dispersant provided in this example is prepared by the following method:

[0053] (1) Crush various solid materials to ≤1mm, accurately weigh according to the composition ratio, sodium lignosulfonate 7.0g, acrylamide 4.5g, allyl sodium sulfonate 13.1g, potassium persulfate 0.0065g, distilled water 66.85g, each material accurately weighed is placed in the reaction vessel;

[0054] (2) Turn on the agitator and turn on the heating button of the reactor at the same time, control the reaction temperature to 65°C, and keep stirring for 5 minutes;

[0055] (3) After stirring for a certain time, slowly add 7.9g of acrylic acid to the reactor, measure the pH value of the solution at this time to 4, and continue stirring for 5 minutes;

[0056] (4) After stirring for 5 minutes, continue to raise the temperature so that the temperature of the reactor is 88°C, continue to stir, and the reaction time is 3 hours. After...

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Abstract

The invention relates to a copper-lead-zinc smelting wastewater sludge depolymerization dispersant and a preparation method thereof, comprising the following components in parts by mass: 4.5-11.5 parts of sodium lignosulfonate, 4.0-8.5 parts of acrylamide, olefin 8.5-15.5 parts of sodium propylsulfonate, 4.5-11.5 parts of acrylic acid, 55-75 parts of distilled water and 0.4-0.85 parts of initiator. The described copper-lead-zinc smelting wastewater sludge depolymerization dispersant, after adding copper-lead-zinc smelting wastewater sludge, will make the surface of the sludge particles carry the same charge (negative charge or positive charge), and each sludge particle is due to The existence of the same charge forms electrostatic repulsion, disperses the sludge particles, destroys the flocculation structure of the sludge, releases the wrapped water, reduces the water retention rate of the sludge, and effectively increases the fluidity of the sludge.

Description

technical field [0001] The invention relates to the field of harmless disposal and resource utilization of copper-lead-zinc smelting wastewater sludge, in particular to a copper-lead-zinc smelting wastewater sludge depolymerization dispersant and a preparation method thereof. Background technique [0002] Acid-containing wastewater is one of the main pollutants in the smelting process. It is generally acidic and contains traces of heavy metal elements. In industrial production, agents for removing heavy metal ions are usually added to acid-containing wastewater. After adding the agent, the waste water A large amount of waste residue from neutralization will remain. At present, calcium carbonate and calcium oxide are mainly used as neutralizers in China, which are cheap, easy to obtain and easy to dehydrate, but will produce a large amount of calcium sulfate slag, and the moisture content of calcium sulfate slag after pressure filtration is usually 28.0%-50.0 %, the main com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/56C08F228/02C08F220/06C02F11/148C02F103/16
CPCC02F2103/16C08F289/00C02F11/148C08F220/56C08F228/02C08F220/06
Inventor 赵庆朝杨航李伟光朱阳戈
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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