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Manganese slag solid waste resourceful treatment method and application thereof

A treatment method and resource utilization technology, applied in the field of manganese slag solid waste recycling treatment, can solve the problems of high cost, chronic poisoning, waste of manganese resources, etc.

Active Publication Date: 2021-07-16
KUNMING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total manganese content in the residue is generally as high as 15%. A large amount of manganese slag has not been properly treated. Under the long-term weathering and leaching, free heavy metal ions will be formed. May cause chronic poisoning, producing central nervous system symptoms
If a large amount of manganese slag is finally disposed of in a landfill, it will occupy a large area and cost high, and there is a risk of excessive leachate and large inventory, which may cause debris flow disasters in case of heavy rain, and will also cause a lot of waste of manganese resources. Therefore, seeking A way to recover and comprehensively utilize manganese slag resources, which is very important for water resources treatment

Method used

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  • Manganese slag solid waste resourceful treatment method and application thereof
  • Manganese slag solid waste resourceful treatment method and application thereof
  • Manganese slag solid waste resourceful treatment method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 Manganese slag solid waste resource treatment

[0039] The first step: add deionized water, and prepare the manganese slag into a 10wt% concentration slurry;

[0040] Step 2: Use a 70°C water bath to stir, the stirring speed is about 800r / min, control the slurry to form a vortex, and the stirring time is 30min;

[0041] The third step: After filtering, the filter residue is immersed in water for 12 hours with a horizontal shaker;

[0042] Step 4: Use a vacuum circulating pump to filter the impurity-removed slurry, use a pH meter and an atomic absorption instrument to detect the pH value and the content of heavy metal ions such as arsenic, chromium, and lead in the water body, and strictly control the pH ≥ 6.8, and the arsenic , chromium, lead and other heavy metal ions content ≤ 0.1mg / L; if it still exceeds the standard, perform water bath purification again, if the test is qualified, enter the next step;

[0043] Step 5: Use a constant temperature dryer ...

Embodiment 2

[0046] Embodiment 2 Manganese slag solid waste resource treatment

[0047] The first step: add deionized water, and prepare manganese slag into 20wt% concentration slurry;

[0048] Step 2: Use 80°C water bath to stir, the stirring speed is about 800r / min, control the slurry to form a vortex, and the stirring time is 30min;

[0049] The third step: After filtering, the filter residue is immersed in water for 10 hours with a horizontal shaker;

[0050] Step 4: Use a vacuum circulating pump to filter the impurity-removed slurry, use a pH meter and an atomic absorption instrument to detect the pH value and the content of heavy metal ions such as arsenic, chromium, and lead in the water body, and strictly control the pH ≥ 6.8, and the arsenic , chromium, lead and other heavy metal ions content ≤ 0.1mg / L; if it still exceeds the standard, perform water bath purification again, if the test is qualified, enter the next step;

[0051] Step 5: Use a constant temperature dryer to dry f...

Embodiment 3

[0054] Embodiment 3 Manganese slag solid waste resource treatment

[0055] The first step: add deionized water, and prepare the manganese slag into a 10wt% concentration slurry;

[0056] Step 2: Use 80°C water bath to stir, the stirring speed is about 800r / min, control the slurry to form a vortex, and the stirring time is 30min;

[0057] The third step: After filtering, the filter residue is immersed in water for 10 hours with a horizontal shaker;

[0058] Step 4: Use a vacuum circulating pump to filter the impurity-removed slurry, use a pH meter and an atomic absorption instrument to detect the pH value and the content of heavy metal ions such as arsenic, chromium, and lead in the water body, and strictly control the pH ≥ 6.8, and the arsenic , chromium, lead and other heavy metal ions content ≤ 0.1mg / L; if it still exceeds the standard, perform water bath purification again, if the test is qualified, enter the next step;

[0059] Step 5: Use a constant temperature dryer to...

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Abstract

The invention discloses a manganese slag solid waste resourceful treatment method and application thereof, and belongs to the technical field of sewage treatment. The method comprises the following steps: adding deionized water into manganese slag to prepare ore pulp with the concentration of 10wt%-30wt% from the manganese slag; stirring in a water bath to control the slurry to form vortex; carrying out water immersion on filter residues for 8-12 hours after filtering; carrying out suction filtration, detecting the pH value and the heavy metal ion content in the water body, if the pH value and the heavy metal ion content still exceed the standard, carrying out water bath purification again, and if the pH value and the heavy metal ion content are qualified in detection, entering the next step; drying to enable the materials to be fully separated from bound water, and performing constant weight test; performing dry crushing to ensure that the material monomer dissociation degree is greater than or equal to 99% and the material granularity D100 is controlled to be less than or equal to 100 meshes; and preparing the material into spheres with the diameter R of 5mm-50mm. According to the method, the manganese slag is subjected to purification pretreatment, so that delta-type manganese-based alkaline substances are enriched, the delta-type manganese-based alkaline substances are fully contacted and reacted with pollution factors, and endocrine disruptors (EDCs) in a water body are catalytically oxidized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a manganese slag solid waste resource treatment method and its application. Background technique [0002] Environmental endocrine disruptors (EDCs), also known as environmental hormones, refer to exogenous substances that persist in the environment and will intervene in the body to interfere with the synthesis, secretion, transportation, metabolism, and combination of the body's own normal hormones. substance. Many substances in the environment have endocrine disrupting effects, and there are many kinds of these substances with great differences. Including not only refractory persistent organic pollutants (POPs) (such as polychlorinated biphenyls, dioxins, organochlorine pesticides, etc.), but also easily degradable hormones excreted by animals and humans, birth control drugs (steroids), Plastic additives and detergent degradation products (phenols), natural plant horm...

Claims

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Application Information

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IPC IPC(8): C04B5/00C02F1/72C02F1/58C02F101/30
CPCC04B5/00C02F1/72C02F1/58C02F2101/305
Inventor 何力为操璟璟周曼郑才庆
Owner KUNMING UNIV
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