Method of harmlessly treating electrolytic manganese residue percolate

A technology of harmless treatment and electrolysis of manganese slag, which is applied in the fields of filtration treatment, chemical instruments and methods, metallurgical wastewater treatment, etc. Excellent effect, simple process technology and strong controllability

Inactive Publication Date: 2016-12-07
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems in the prior art, the electrolytic manganese slag leachate can not achieve good harmless treatment, complex process and other problems, to provide an environmentally friendly method for the harmless treatment of electrolytic manganese slag leachate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for harmless treatment of electrolytic manganese slag leachate, wherein the electrolytic manganese slag leachate is an accumulation of liquid formed after being washed by rainwater and permeated by manganese slag itself, which is characterized in that it comprises the following steps:

[0040] 1) The electrolytic manganese slag leachate collected in the slag storehouse is suction-filtered by a circulating water type multi-purpose vacuum pump to obtain a clarified filtrate;

[0041] 2) Measure 300 mL of the clarified filtrate obtained in step 1) and place it in a water tank, add saturated clarified lime water to the container, adjust the pH value of the solution to 7.0, and obtain mixture A;

[0042] 3) Add 1.5 g of sodium silicate powder to the container where the mixture A is located, and stir for 2 hours to obtain the mixture B; the stirring speed is 80 r / min;

[0043] 4) Add sodium chloride crystals to the container where the mixture B is located, and stir t...

Embodiment 2

[0049] A method for harmless treatment of electrolytic manganese slag leachate, wherein the electrolytic manganese slag leachate is an accumulation of liquid formed after being washed by rainwater and permeated by manganese slag itself, which is characterized in that it comprises the following steps:

[0050] 1) The electrolytic manganese slag leachate collected in the slag storehouse is suction-filtered by a circulating water type multi-purpose vacuum pump to obtain a clarified filtrate;

[0051]2) Measure 300 mL of the clarified filtrate obtained in step 1) and place it in a water tank, add saturated clarified lime water to the container, adjust the pH value of the solution to 7.5, and obtain mixture A;

[0052] 3) Add 2.0 g of sodium silicate powder to the container where the mixture A is located, and stir for 1 hour to obtain the mixture B; the stirring rate is 100 r / min;

[0053] 4) Add sodium chloride crystals to the container where the mixture B is located, and stir to ...

Embodiment 3

[0059] A method for harmless treatment of electrolytic manganese slag leachate, wherein the electrolytic manganese slag leachate is an accumulation of liquid formed after being washed by rainwater and permeated by manganese slag itself, which is characterized in that it comprises the following steps:

[0060] 1) The electrolytic manganese slag leachate collected in the slag storehouse is suction-filtered by a circulating water type multi-purpose vacuum pump to obtain a clarified filtrate;

[0061] 2) Measure 300 mL of the clarified filtrate obtained in step 1) and place it in a water tank, add saturated clarified lime water to the container, adjust the pH value of the solution to 7.8, and obtain mixture A;

[0062] 3) Add 1.7 g of sodium silicate powder to the container where the mixture A is located, and stir for 1.6 hours to obtain the mixture B; the stirring speed is 85 r / min;

[0063] 4) Add sodium chloride crystals to the container where the mixture B is located, and stir...

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Abstract

The invention discloses a method of harmlessly treating electrolytic manganese residue percolate, characterized by comprising the steps of 1), percolating electrolytic manganese residue percolate collected in a residue storage to obtain clarified filtrate; 2), adding saturated clarified limewater in a container of the clarified filtrate, and adjusting pH of a solution to 7.0-8.0 to obtain mixture A; 3), adding sodium silicate powder into the mixture A, and stirring for 1-2 hours to obtain mixture B, wherein a weight-volume ratio (g:mL) of the sodium silicate to the clarified filtrate of step 1) ranges from 1:150 to 1:200; 4), adding sodium chloride crystal into mixture B, and stirring to obtain mixture C, wherein sodium chloride concentration in the mixture C ranges from 200 mg/L to 250 mg/L; 5), adding a positive plate and a negative plate into a container of the mixture C, loading an electric field, and stirring for 3-4 hours to obtain the electrolytic manganese residue percolate that is harmlessly treated, wherein voltage of the electric field is 10-20 V.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for harmless treatment of electrolytic manganese slag leachate. Background technique [0002] Electrolytic manganese slag is a kind of industrial waste produced by pressure filtration in the process of producing metal manganese by electrolysis. At present, electrolytic manganese slag is discharged in the form of open storage. [0003] The composition of electrolytic manganese slag is complex, the particles are fine, the water content is high, and it is in the form of slurry. During the storage of electrolytic manganese slag, the main toxic pollutants produced are Mn 2+ and NH 4 + -N. [0004] Soluble manganese and ammonia nitrogen will form leachate under the erosion of rainwater and its own infiltration. The content of Mn in the electrolytic manganese slag leachate is 1776.8mg / L, which is 355 times of the standard, and the NH 4 + -N content is 1225.8mg / L, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C22B7/00C22B47/00C02F103/16C02F101/20
CPCC02F1/001C02F1/4674C02F1/5236C02F1/66C02F9/00C02F2101/206C02F2103/16C22B7/006C22B47/00Y02P10/20
Inventor 唐金晶陶长元马小霞袁玉南刘作华
Owner CHONGQING UNIV
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