Processing method of molybdenum mineral dressing waste water

A treatment method and technology for mineral processing wastewater, applied in multi-stage water treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of repeated acid-base adjustment of wastewater, large fluctuations in effluent water quality, and many types of dosing, etc. Achieve the effects of easier recovery after cleaning, lower operating costs, and improved water quality

Inactive Publication Date: 2019-01-11
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is simple to operate, there are still problems such as large amount of dosing, large fluctuations in effluent water quality, and secondary pollution caused by commonly used aluminum or iron salt coagulants.
CN101928083A discloses a treatment method for waste water containing heavy metal molybdenum, which adopts the chemical precipitation method of sodium sulfide precipitation + secondary coagulation precipitation, and the treatment effect is better, but there are many types of dosing, large dosing amount, and repeated acid adjustment of waste water Alkali and other issues

Method used

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  • Processing method of molybdenum mineral dressing waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The wastewater from a molybdenum mine in Hunan was tested as the raw water. The influent water quality fluctuated, SS 300-400mg / L, COD60-80mg / L, Zn 0.1-0.5mg / L, Pb 0-0.2mg / L, Cu 0.3- 0.5mg / L, pH 8-9.

[0032] Such as figure 1 As shown, the operating parameters of this process are as follows: the raw water enters the pre-settling tank, and the settling time is 4h. The supernatant of the pre-sedimentation tank enters the flat ceramic membrane tank, the material of the flat ceramic membrane is silicon carbide, the pore size is 0.2 μm, and the area of ​​the membrane module is 100m 2 , each run for 9 minutes, stop for 1 minute, the suction negative pressure is -10 ~ -20KPa, and the membrane flux is 300-400LMH. Backwashing is performed every 60 minutes, the backwashing time is 30s, the pressure is 2bar, and the backwashing flux is 800LMH. After backwashing, the membrane flux can be restored to 400LMH. The aeration continues, the air-to-water ratio is 10:1, and the fan pres...

Embodiment 2

[0035] The wastewater from a molybdenum mine in Luoyang, Henan Province was tested as raw water. The influent water quality fluctuated, SS 200-1000mg / L, COD 50-70mg / L, silicate <400mg / L, pH 7-9.

[0036] Such as figure 1 As shown, the operating parameters of this process are as follows: the raw water enters the pre-settling tank, and the settling time is 1h. The supernatant of the pre-sedimentation tank enters the flat ceramic membrane tank, the material of the flat ceramic membrane is alumina, the pore size is 0.1 μm, and the area of ​​the membrane module is 2.5m 2 , run for 8 minutes, stop for 2 minutes, suction negative pressure is -5 ~ -20KPa, membrane flux 100-200LMH. Backwashing is performed every 60 minutes, the backwashing time is 30s, the pressure is 2bar, and the backwashing flux is 300LMH. After backwashing, the membrane flux can be restored to 200LMH. The aeration is carried out intermittently, every 30 minutes after stopping, it runs for 1 minute, the air-water ...

Embodiment 3

[0040] A molybdenum mine beneficiation wastewater in Henan was used as raw water for testing, and the influent water quality fluctuated, SS 7000-10000mg / L, COD 200-300mg / L, Zn 3-5mg / L, Pb 2-3mg / L, As0-0.03mg / L, pH 6.0-7.0.

[0041] Such asfigure 1 As shown, the operating parameters of this process are as follows: the raw water enters the pre-settling tank, and the settling time is 12h. The supernatant of the pre-sedimentation tank enters the flat ceramic membrane tank, the material of the flat ceramic membrane is cordierite and alumina, the pore diameter is 0.2μm, and the membrane module area is 50m 2 , every time it runs for 8.5 minutes, stop for 1.5 minutes, the suction negative pressure is -10 ~ -30KPa, and the membrane flux is 150-250LMH. Backwashing is performed every 30 minutes, the backwashing time is 60s, the pressure is 2bar, and the backwashing flux is 500LMH. After backwashing, the membrane flux can be restored to 500LMH. The aeration continues, the air-to-water ...

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Abstract

The invention discloses a processing method of molybdenum mineral dressing waste water. The processing method comprises following steps: 1, molybdenum mineral dressing waste water is introduced into apre-precipitation pool for precipitation so as to obtain pre-precipitation pool bottom sludge and a pre-precipitation pool supernatant; 2, the pre-precipitation pool supernatant is introduced into aflat ceramic membrane pool, and a flat ceramic membrane assembly is adopted for purifying to remove small particles and reduce the turbidity of produced water; 3, unfiltered waste water in the flat ceramic membrane pool is introduced into a reaction pool through a pipeline for reaction; and 4, waste water from the reaction pool is introduced into a precipitation pool for precipitation so as to obtain a precipitation supernatant and a precipitation pool bottom sludge. According to the processing method, the flat ceramic membrane is adopted for processing of molybdenum mineral dressing waste water, so that small particles can be removed with high efficiency, the turbidity of produced water is low, the technology is stable, waste water amount is reduced greatly, the adding amount of medicinesis low, operation cost is reduced greatly, precipitation pool equipment size and occupied land area are reduced at the same time, and investment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mine wastewater treatment, and in particular relates to a treatment method for molybdenum ore dressing wastewater. Background technique [0002] Molybdenum ore beneficiation wastewater includes beneficiation process drainage, tailings pond overflow water and mine drainage. Molybdenum ore beneficiation wastewater has complex composition and high concentration of pollutants. The main pollutants in wastewater include suspended solids, beneficiation agents, acids and bases, heavy metals, etc., especially the high content of suspended solids and COD, which cannot be directly reused. If the molybdenum ore beneficiation wastewater is discharged directly, it will not only cause a large waste of water resources, but also cause serious environmental pollution. If the molybdenum ore beneficiation wastewater is properly treated to partially or completely replace the beneficiation production water, it will not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/44C02F1/441C02F1/52C02F1/5236C02F1/5245C02F1/56C02F1/66C02F9/00C02F11/122C02F2209/06C02F2209/08C02F2209/10C02F2209/11C02F2301/046C02F2301/08C02F2303/14
Inventor 黄凤祥姚萌陈柏义林亚强洪昱斌蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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