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Method for treating waste acids with iron-based oxide residues

A technology of iron-based oxides and waste residues, applied in metallurgical wastewater treatment, chemical instruments and methods, filtration treatment, etc., to achieve the effect of stable structure, simple operation, and not easy to migrate

Inactive Publication Date: 2018-12-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the existing problems and deficiencies in the current treatment of dirty acid, the present invention provides a method for treating dirty acid with iron-based oxide waste residue. The method of the present invention uses iron-based oxide waste residue to treat dirty acid wastewater without clogging pipes and valves, and the entire system operates Stable, good processing effect and other advantages

Method used

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  • Method for treating waste acids with iron-based oxide residues
  • Method for treating waste acids with iron-based oxide residues
  • Method for treating waste acids with iron-based oxide residues

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Experimental program
Comparison scheme
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Embodiment 1

[0021] Embodiment 1: In terms of mass percentage, the main components of the iron-based oxide waste residue in this embodiment are shown in Table 1,

[0022] Table 1 Composition of iron-based oxides

[0023]

[0024] The polluted acid wastewater of the present embodiment is the polluted acid wastewater produced in the lead smelting process, and the concentration of hydrogen ions in the polluted acid wastewater is 0.15mol / L, and the composition and content are as shown in Table 2 in the polluted acid wastewater,

[0025] Table 2 Composition and content of polluted acid wastewater

[0026]

[0027] A method for treating dirty acid with iron-based oxide waste residue, the specific steps are as follows:

[0028] (1) The iron-based oxide waste slag (steel-making steel slag) was crushed through a 200-mesh sieve, washed three times with deionized water, and dried to obtain the iron-based oxide waste slag powder; Iron oxide content in steel slag) is 35%;

[0029] (2) Add the ...

Embodiment 2

[0034] Embodiment 2: In terms of mass percentage, the main components of the iron-based oxide waste residue in this embodiment are shown in Table 4,

[0035] Table 4 Composition of iron-based oxides

[0036]

[0037] The polluted acid wastewater of the present embodiment is the polluted acid wastewater produced in the copper smelting process, and the concentration of hydrogen ions in the polluted acid wastewater is 0.4mol / L, and the composition and content are as shown in Table 5 in the polluted acid wastewater,

[0038] Table 5 Composition and content of polluted acid wastewater

[0039]

[0040] A method for treating dirty acid with iron-based oxide waste residue, the specific steps are as follows:

[0041] (1) The iron-based oxide waste residue (pyrite slag) was crushed through a 150-mesh sieve, washed three times with deionized water, and dried to obtain the iron-based oxide waste residue powder; in which, the iron-based oxide waste residue was (pyrite slag) iron o...

Embodiment 3

[0047] Embodiment 3: In terms of mass percentage, the main components of the iron-based oxide waste residue in this embodiment are shown in Table 7,

[0048] Table 7 Iron-based oxide components

[0049]

[0050] The polluted acid wastewater of the present embodiment is the polluted acid wastewater produced in the copper smelting process, and the concentration of hydrogen ions in the polluted acid wastewater is 0.6mol / L, and the composition and content are as shown in Table 8 in the polluted acid wastewater.

[0051] Table 8 Composition and content of polluted acid wastewater

[0052]

[0053] A method for treating dirty acid with iron-based oxide waste residue, the specific steps are as follows:

[0054] (1) The iron-based oxide waste residue (iron-containing sediment) was crushed through a 100-mesh sieve, washed twice with deionized water, and dried to obtain the iron-based oxide waste residue powder; in which, in terms of mass percentage, the iron-based oxide waste re...

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Abstract

The invention relates to a method for treating waste acids with iron-based oxide residues and belongs to the technical field of waste acid treatment. The method comprises the following steps: smashingiron-based oxide residues and screening with a 100-300 mesh sieve, cleaning for 2-3 times with deionized water, distilled water or pure water, and then drying, thereby acquiring iron-based oxide residue powder; adding the iron-based oxide residue powder into the waste acids and uniformly mixing, thereby acquiring a mixed system; regulating pH value to 4-5 with alkali; under an external field condition, heating the mixed system to 60-70 DEG C, shaking for 1-2h, standing for 1.5-2.5h and performing solid-liquid separation, thereby acquiring supernate and solids on bottom, wherein the external field is one or more of ultrasonic field, microwave field, magnetic field, electric field and pressurizing field. The method for treating waste acids with iron-based oxide residues provided by the invention has the advantages that the pipelines and valves are not blocked, the running of the whole system is stable, the treatment effect is excellent, and the like.

Description

technical field [0001] The invention relates to a method for treating dirty acid with iron-based oxide waste residue, and belongs to the technical field of dirty acid treatment. Background technique [0002] Sewage acid is the wastewater produced during the acid washing process of copper, lead, zinc and other smelting flue gas, which mainly contains sulfuric acid, arsenic, mercury, cadmium, lead, zinc and fluorine and other pollutants. The composition of polluted acid wastewater is complex, the pH is low, and the content of various heavy metals and fluorine exceeds the standard by dozens or even hundreds of times. The treatment and reuse of polluted acid wastewater has become an important environmental problem faced by the metal smelting industry. At present, there is no generally accepted and ideal method for the treatment of polluted acid wastewater. The commonly used treatment methods are lime neutralization method, high concentration mud method, vulcanization method, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F103/16
CPCC02F9/00C02F2103/16C02F2101/20C02F1/66C02F1/001
Inventor 黄建洪高一强张利祥田森林胡学伟李英杰
Owner KUNMING UNIV OF SCI & TECH
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