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A method for preparing polymeric aluminum-iron flocculant from steel wire rope acid mud

A technology of polymerizing aluminum-iron and steel wire ropes, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, sludge treatment, etc., can solve problems such as waste of resources, underutilization of metal elements, occupation of landfill sites, etc., to achieve The effect of excellent purification performance

Active Publication Date: 2017-09-01
刘阳生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods are based on the idea of ​​waste disposal to deal with steel wire rope acid mud, and the metal elements such as iron and aluminum contained in the acid mud are not fully utilized, which not only wastes resources, but also occupies landfill sites

Method used

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  • A method for preparing polymeric aluminum-iron flocculant from steel wire rope acid mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] See figure 1 , Add 2000L of sulfuric acid solution 1 with a mass concentration of 10% into the reaction tank 2, then add 1000kg of sodium sludge with a water content of 75%, stir and react at room temperature for 30 minutes, and remove 10kg of sodium sludge residue A through the plate and frame filter press 3. 5. Obtain 2500L of sulfuric acid extract of sodium mud A4. Add 2000L of hydrochloric acid solution 10 with a mass concentration of 18% into the lime mud reactor 11, then add 1000kg of lime mud with a water content of 75%, stir at room temperature for 30 minutes, and remove 15kg of lime mud residue through a plate and frame filter press 12 B 6, to obtain 2500L of hydrochloric acid extract 13 of calcium mud. After the hydrochloric acid extract 13 of calcium mud was treated with D113 type macroporous weakly acidic acrylic cation exchange resin 14 for 60 minutes, a lead-removed calcium mud hydrochloric acid extract B19 was obtained.

[0025] (1) Preparation of polyalum...

Embodiment 2

[0029] See figure 1 , Add 2000L of sulfuric acid solution 1 with a mass concentration of 20% into the reaction tank 2, then add 1000kg of sodium sludge with 80% moisture content, stir and react at room temperature for 45 minutes, and remove 12kg of sodium sludge residue A 5 through the plate and frame filter press 3. , To obtain 2600L sodium mud sulfuric acid extract A4. Add 2000L of hydrochloric acid solution 10 with a mass concentration of 25% into the lime mud reactor 11, then add 1000kg of lime mud with a moisture content of 78%, stir at room temperature for 45 minutes, and remove 16kg of lime mud residue B through the plate and frame filter press 12. 6. Obtain 2600L of hydrochloric acid extract 13 of calcium mud. After the hydrochloric acid extract 13 of the lime mud was treated with a 201×7 type strong alkaline styrene-based anion exchange resin 14 for 60 minutes, a lead-removed lime mud hydrochloric acid extract B 19 was obtained.

[0030] (1) Preparation of polyaluminum...

Embodiment 3

[0033] Example 3: Use case

[0034] The polyaluminum iron flocculant prepared in Example 1 was used for domestic sewage treatment. At 1 m 3 Add 1.5 kg of polyaluminum iron flocculant to the domestic sewage, stir for 5 minutes, let it settle for 60 minutes, and take samples to test the effect of domestic sewage treatment. Before treatment, the turbidity of domestic sewage is 226.7 NTU, COD Cr 715.6 mg / L, ammonia nitrogen 32 mg / L, total phosphorus 3.8 mg / L, after treatment with polyaluminum iron flocculant, sewage turbidity dropped by 98%, COD Cr The removal rates of, ammonia nitrogen and total phosphorus are 78.5%, 80.3% and 80% respectively.

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Abstract

The invention discloses a method for preparing a polymerized aluminum-iron flocculant from steel wire rope pickling sludge (abbreviated as acid sludge). The method adopts hydrochloric acid and sulfuric acid as extraction agents respectively, extracts metal iron ions and aluminum ions in calcium mud and sodium mud, removes lead ions therein through ion exchange resin, and further processes the extract into a polymerized aluminum-iron flocculant to realize The resource utilization of calcium mud and sodium mud, by adding cement to the calcium mud residue and sodium mud residue to solidify, realize the stabilization and harmlessness of heavy metals in the residue, and use deionized water to regenerate the saturated ion exchange resin During the process, sodium hydroxide solution is used to treat the wastewater generated during the regeneration process, so that the wastewater can be discharged up to the standard. The method has a recovery rate of more than 90% for iron and aluminum in the acid mud; the flocculant has excellent purification performance for domestic sewage.

Description

Technical field [0001] The invention belongs to the field of harmless treatment and resource utilization of industrial sludge, and relates to a method for preparing a polyaluminum iron flocculant from steel wire rope acid sludge. Background technique [0002] A large amount of acidic waste water is produced during the production of steel wire rope, which mainly comes from pickling and phosphating production processes, and contains a large amount of heavy metal elements, such as iron, lead, and zinc. The wastewater treatment method mainly adopts the hydroxide precipitation method. Lime milk or sodium hydroxide is used as alkaline precipitant, added to wastewater, and heavy metals are separated by precipitation and separation of water-insoluble hydroxides through neutralization. These precipitates formed are steel rope pickling sludge, abbreviated as Sour sludge, sour sludge is processed after being filtered by plate and frame. The acid mud produced by the calcium hydroxide precip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F11/00C02F103/16
Inventor 刘阳生施荣标
Owner 刘阳生
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