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Method for treating waste residue by using arsenious wastewater in clean mode

A waste water treatment and waste residue technology, applied in metallurgy and gold smelting fields, can solve the problems of poor arsenic comprehensive recovery effect and low recovery rate

Active Publication Date: 2015-03-11
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for cleanly utilizing arsenic-containing wastewater to treat waste residues, which overcomes the defects of the existing methods that produce a large amount of dangerous solid emissions and the comprehensive recovery of arsenic is poor and the recovery rate is low

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  • Method for treating waste residue by using arsenious wastewater in clean mode
  • Method for treating waste residue by using arsenious wastewater in clean mode
  • Method for treating waste residue by using arsenious wastewater in clean mode

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Embodiment 1

[0019] A method for cleanly utilizing arsenic-containing wastewater to treat waste residues, comprising the following steps: the arsenic-containing gold concentrate is subjected to ore blending and slurry adjustment, and then undergoes two-stage roasting pretreatment at a roasting temperature of 630°C to 650°C to generate dust-containing flue gas And baked sand, dusty flue gas namely arsenic, carbon, sulfur and As 2 o 3 , CO 2 , SO 2 The gaseous form enters the flue gas and recovers As through the bag arsenic collection device 2 o 3 , and then carry out wet purification through the acid system to produce dilute arsenic acid, wherein the dilute arsenic acid contains 1235.00 mg / l of arsenic; the baked sand is leached out of arsenic and copper by 5% sulfuric acid solution to produce arsenic acid leaching solution. The leaching time was 1.5 hours, and the arsenic content in the pickling solution was 1689.00mg / l, wherein the mass ratio of baked sand to 5% sulfuric acid solution...

Embodiment 2

[0023] A method for cleanly utilizing arsenic-containing wastewater to treat waste residues, comprising the following steps: the arsenic-containing gold concentrate is subjected to ore blending and slurry adjustment, and then undergoes two-stage roasting pretreatment at a roasting temperature of 630°C to 650°C to generate dust-containing flue gas And baked sand, dusty flue gas namely arsenic, carbon, sulfur and As 2 o 3 , CO 2 , SO 2 The gaseous form enters the flue gas and recovers As through the bag arsenic collection device 2 o 3 , and then carry out wet purification through the acid system to produce dilute arsenic acid, wherein the dilute arsenic acid contains 1535.00 mg / l of arsenic; the baked sand is leached out of arsenic and copper by 10% sulfuric acid solution to produce arsenic acid leaching solution. The leaching time is 2.5 hours, the arsenic content of the acid leaching solution is 1726.00mg / l, the mass ratio of baked sand to 10% sulfuric acid solution is 3:1...

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Abstract

The invention relates to a method for treating waste residue by using arsenious wastewater in a clean mode. The method comprises the following steps of: carrying out roasting pretreatment on arsenious gold concentrate so as to generate dusty fume and roasting sand, recycling As2O3 from the dusty fume containing gas-state As2O3, CO2 and SO2 by using a cloth bag, and carrying out wet-method purification by using an acid-making system so as to generate arsenic dilute acid; extracting arsenic and copper from the generated roasting sand by using a 5-10% sulfuric acid solution, so as to generate an arsenic pickle liquid; carrying out neutralization reaction on a mixed solution of the arsenic dilute acid and the arsenic pickle liquid and lime so as to settle arsenic; at the end of the reaction, adding a flocculating agent for concentrating and settling, carrying out neutralization aeration treatment on the liquid after the arsenic is settled, so as to recycle the liquid; and after the arsenic is settled, returning the residue, namely calcium arsenate, to the processes of gold concentrate size mixing, roasting, spraying and condensation so as to generate an arsenic trioxide product. The arsenious dilute acid and the pickle liquid are directly neutralized by lime so as to generate the arsenious waste residue, namely calcium arsenate, and then the calcium arsenate is roasted to generate arsenic trioxide product, so that the secondary environment pollution of the arsenious dilute acid and the pickle liquid treatment waste residue is prevented, and the purpose of innocent treatment is reached.

Description

technical field [0001] The invention relates to a method for cleanly utilizing arsenic-containing waste water to treat waste residue, and belongs to the fields of gold smelting and metallurgy. Background technique [0002] At present, arsenic-containing carbon-gold concentrates are complex gold concentrates that are difficult to treat. The treatment processes mainly include biological oxidation, pressurized oxidation, roasting, and two-stage roasting. The problem of waste water treatment. For the treatment of arsenic-containing acidic wastewater, lime is added to iron salt neutralization aeration method. In these methods, arsenic enters the neutralization waste residue after neutralization and aeration treatment, forming dangerous solid discharge. The comprehensive recovery effect of arsenic is poor and the recovery rate is low. , potentially harmful to the surrounding environment. Contents of the invention [0003] The technical problem to be solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B3/08C22B3/44C02F1/58C02F1/66C22B11/00C22B30/04C02F101/10C02F103/16
CPCY02P10/20
Inventor 王建政吕寿明孙忠胜梁志伟
Owner SHANDONG GUODA GOLD
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