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Method for treating waste water from copper smelting by using modified ardealite

A phosphogypsum and copper smelting technology, which is applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as odor generation, undrinkable water quality, etc., and achieve low treatment costs, The effect of low cost, automatic control and increased degree of mechanization

Inactive Publication Date: 2011-02-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Copper smelting, processing, electroplating and other industrial production processes will produce a large amount of copper-containing wastewater, the copper concentration of which is as high as tens of mg / L. If this wastewater is discharged into the water body, it will seriously affect the quality of the water and cause pollution to the environment.
When the copper content in water reaches 0.01mg / L, it has obvious inhibitory effect on the self-purification of the water body; if it exceeds 3.0mg / L, it will produce peculiar smell; if it exceeds 15mg / L, it will not be drinkable

Method used

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  • Method for treating waste water from copper smelting by using modified ardealite
  • Method for treating waste water from copper smelting by using modified ardealite
  • Method for treating waste water from copper smelting by using modified ardealite

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Experimental program
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Effect test

preparation example Construction

[0047] (2) Preparation of modified phosphogypsum

[0048] Add a modifier to the phosphogypsum, the modifier is quicklime and fly ash, and the ratio of addition is: 55% to 65% of phosphogypsum, 25 to 45% of fly ash, 5 to 10% of quicklime, and mix well;

[0049] (3) Adsorption research

[0050] Modified phosphogypsum at 10kg / m 3 Add the amount of copper smelting waste water, mix and stir, filter after contacting for 1 hour, and measure the content of copper, zinc, cadmium and other ions in the filtrate after treatment. Use an atomic absorption spectrophotometer to measure the content of copper, zinc, cadmium and other ions in the effluent, and use the subtraction method to calculate the amount of heavy metals adsorbed by the adsorption material.

[0051] (4) Treatment of adsorbent

[0052] The adsorbent is dehydrated after precipitation, and can be used as building material after drying. Such as the production of building gypsum board, gypsum powder, etc. The wastewater use...

Embodiment 1

[0054] Embodiment 1: the modified phosphogypsum is mixed with 5kg / m 3 Add the above-mentioned amount of smelting wastewater, mix and stir, filter after 40 minutes of contact, measure the content of copper in the treated filtrate to be 10mg / L, the content of zinc to be 7mg / L, the content of lead to be 2mg / L, the content of cadmium The content is 1mg / L.

Embodiment 2

[0055] Embodiment 2: with modified phosphogypsum at 10kg / m 3 Add the above-mentioned smelting wastewater, mix and stir, filter after contacting for 1 hour, measure the content of copper in the treated filtrate to be 4 mg / L, the content of zinc to be 5 mg / L, the content of lead to be 1.2 mg / L, and the content of cadmium to be 1.2 mg / L. The content is 0.5mg / L.

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Abstract

The invention discloses a method for treating waste water from copper smelting by using modified ardealite, which comprises the following steps: (1) preparing modified ardealite: adding modifiers into the ardealite and mixing uniformly, wherein the modified ardealite comprises 55 to 65 percent of ardealite, 25 to 45 percent of fly ash and 5 to 10 percent of quick lime; (2) absorption: adding the modified ardealite into the waste water from copper smelting according to a ratio of 10Kg / m<3>, mixing, stirring, contacting for one hour, filtering, and detecting the content of copper ions, zinc ions, cadmium ions and other ions of the treated filtrate; and (3) absorbent treatment: settling, dehydrating and drying the absorbent so that the absorbent can be used as a building material.

Description

technical field [0001] The invention relates to a method for treating copper smelting wastewater after modification by phosphogypsum, a by-product in phosphorus chemical production, and belongs to the field of comprehensive utilization of waste treatment. Background technique [0002] Phosphogypsum is a kind of industrial waste discharged during the production of wet-process phosphoric acid. At present, the annual discharge of phosphogypsum in my country has exceeded 20 million tons, but its utilization rate is very low. to a heavier economic burden. With the increase in the output of high-concentration phosphorus compound fertilizers, more and more low-grade phosphate rocks are used, and the production of phosphogypsum is increasing. Therefore, the disposal and utilization of phosphogypsum has attracted more and more attention in our country. [0003] Copper smelting, processing, electroplating and other industrial production processes will produce a large amount of copper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/62
Inventor 任治忠杨月红杨晓静付廷栋方祖国李迎刘梦雪舒敦涛
Owner KUNMING UNIV OF SCI & TECH
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