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Chemical stabilization agent and chemical stabilization method for arsenic and selenium in lead-zinc smelting wastewater treatment sludge

A wastewater treatment and stabilizer technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve human health hazards, high processing costs of hazardous waste disposal units, and surrounding farmland soil environment Pollution and other issues, to achieve the effect of high stabilization rate

Active Publication Date: 2020-12-04
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For a long time, most of this kind of waste residue has been disposed of by stockpiling or temporary storage, which not only causes serious pollution to the surrounding farmland soil environment, but also causes great harm to human health.
Due to the large amount of waste water treatment sludge, the cost of transferring to hazardous waste disposal units is high, and the pollution problem cannot be completely solved.

Method used

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  • Chemical stabilization agent and chemical stabilization method for arsenic and selenium in lead-zinc smelting wastewater treatment sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 Shown, a kind of method for the chemical stabilization of arsenic and selenium in lead-zinc smelting wastewater treatment sludge, shown method comprises the following steps:

[0027] 1) Lead-zinc wastewater treatment sludge is composed of lead-zinc wastewater treatment sludge and zinc smelter wastewater treatment sludge according to a mass ratio of 1.5:1, and the lead-zinc wastewater treatment sludge is naturally dried (with a moisture content of 5%) and pulverized Cross 20 mesh sieves, sieve remaining 2%, obtain lead-zinc smelting wastewater treatment sludge powder for subsequent use, add stabilizing agent (ferric sulfate consumption is 1%, potassium permanganate consumption is 1% in the lead-zinc smelting wastewater treatment sludge powder material) 0.25%, lime is 0.01%), the amount of stabilizer agent is 1.26% of the mass of the lead-zinc smelting wastewater treatment sludge powder;

[0028] 2) Add the prepared stabilizing agent to the lead-zinc was...

Embodiment 2

[0031] Such as figure 1 Shown, a kind of method for the chemical stabilization of arsenic and selenium in lead-zinc smelting wastewater treatment sludge, shown method comprises the following steps:

[0032] 1) Lead-zinc wastewater treatment sludge is composed of lead-zinc wastewater treatment sludge and zinc smelter wastewater treatment sludge according to a mass ratio of 1.5:1, and the lead-zinc wastewater treatment sludge is naturally dried (moisture content 3%) and pulverized Cross 20 mesh sieves, sieve remaining 2%, obtain lead-zinc smelting wastewater treatment sludge powder for subsequent use, add stabilizing agent in the lead-zinc smelting wastewater treatment sludge powder (calcium sulfate consumption is 3%, hydrogen peroxide consumption is 0.50%, Zeolite is 0.03%), and the amount of stabilizing agent is 3.53% of the sludge powder quality of lead-zinc smelting wastewater treatment;

[0033] 2) Add the prepared stabilizing agent to the lead-zinc wastewater treatment sl...

Embodiment 3

[0036] Such as figure 1 Shown, a kind of method for the chemical stabilization of arsenic and selenium in lead-zinc smelting wastewater treatment sludge, shown method comprises the following steps:

[0037] 1) Lead-zinc wastewater treatment sludge is composed of lead-zinc wastewater treatment sludge and zinc smelter wastewater treatment sludge according to a mass ratio of 1.5:1, and the lead-zinc wastewater treatment sludge is naturally dried (moisture content 1%) and pulverized Cross 20 mesh sieves, sieve remaining 2%, obtain lead-zinc smelting wastewater treatment sludge powder for subsequent use, add stabilizing agent (calcium phosphate consumption is 4%, potassium permanganate and hydrogen peroxide) in the lead-zinc smelting wastewater treatment sludge powder The sum of dosage is 0.75%, lime and magnesite is 0.07%), and the dosage of stabilizing agent is 4.82% of the sludge powder quality of lead-zinc smelting wastewater treatment;

[0038] 2) Add the prepared stabilizing...

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Abstract

The invention discloses a chemistry stabilization chemical for arsenic and selenium in lead zinc smelting wastewater treatment sludge and a chemistry stabilization method. The method comprises the following steps that (1) the lead zinc smelting wastewater treatment sludge is naturally dried, smashed and sieved; (2) lead zinc smelting wastewater treatment sludge powder and the stabilization chemical are uniformly mixed; (3) water is added into the uniformly mixed materials; (4) stirring is performed; (5) placement is performed under the room temperature condition. The arsenic and the selenium can simultaneously realize chemical chemistry stabilization; the stabilization effect is better.

Description

technical field [0001] The invention belongs to the technical field of metal solid waste and hazardous waste treatment in the non-ferrous smelting industry. Specifically, the invention relates to a chemical stabilization agent and a chemical stabilization method for arsenic and selenium in the waste water treatment sludge of lead-zinc smelting. Background technique [0002] In recent years, my country's lead-zinc smelting industry has developed rapidly, but resource shortage and environmental pollution are still the bottleneck of development. When SO in pyrometallurgy process 2 After flue gas is used as raw material for acid production, harmful substances such as arsenic, cadmium, and selenium in minerals are roasted at high temperature and enter the gas phase in the form of oxides. Except for some heavy metals that can be recovered, other heavy metals are washed with flue gas. Into acid wastewater, referred to as dirty acid. [0003] Such acid wastewater often has the cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00
CPCC02F11/004C02F2303/04
Inventor 张华张小国吴亚君卢笛赵志龙范存峰杨晓松刘海珍周连碧杨航李元宏王立运申士富李勇刘涛刘艳华
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY