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Circulating system and process for PAM-containing tailing wastewater treatment

A wastewater treatment and circulation system technology, applied in mining wastewater treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve problems such as increased chemical and salt content, high operating costs, and increased sludge volume , to achieve a high degree of automation, save electricity consumption and chemical costs, and reduce the amount of sludge sedimentation

Pending Publication Date: 2017-05-31
上海铱钶环保科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a PAM-containing tailings wastewater treatment circulation system and process to solve the high operating cost of PAM removal work, increased sludge volume, and increased medicament and salt content in treated wastewater that cannot be reused. question

Method used

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  • Circulating system and process for PAM-containing tailing wastewater treatment
  • Circulating system and process for PAM-containing tailing wastewater treatment
  • Circulating system and process for PAM-containing tailing wastewater treatment

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Embodiment 1

[0027] see Figure 1-3 , the present invention is based on the fact that the COD treatment load of the wastewater is not high and the biodegradability is poor. Therefore, the physical and chemical treatment is selected in the subsequent process of ozone treatment, that is, the combined process of ozone pre-oxidation + coagulation sedimentation + sand filtration, to ensure that the effluent is stable and meets the water quality requirements of circulating water , to achieve wastewater reuse. The whole process adopts feedback mechanisms such as viscosity, turbidity, and ozone concentration in water to realize automatic control of chemical dosage, which is conducive to a virtuous cycle of water reuse.

[0028] The process flow of ozone + coagulation sedimentation + sand filtration process combination treatment for the reuse of PAM tailings wastewater is as follows:

[0029] The tailings wastewater containing PAM mainly comes from ore separation process drainage, tailings pond ov...

Embodiment 2

[0047] The original tailings reuse water of an aluminum mine factory contains polyacrylamide, which is reused after simple coagulation and sedimentation treatment, which often blocks the equipment pipeline system, increases the frequency of equipment cleaning and the work intensity of workers, and affects the production efficiency of the enterprise. To this end, we took water samples from the plant for small-scale experiments, and after several process combinations and comparisons, we finally selected the combined process of ozone pre-oxidation + coagulation sedimentation + sand filtration. Under the weakly alkaline pH value of tailings effluent, add ozone 1-4mg / L, react for 30 minutes, measure the viscosity in the water with a viscometer, control the viscosity within 1mPa·s, and add 120mg of PAC to the effluent into the coagulation reaction tank / l, depending on the size of the alum, adjust the dosage of PAC in real time or add a small amount of PAM to aid coagulation. After p...

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Abstract

The invention relates to a circulating system for PAM-containing tailing wastewater treatment. The circulating system comprises a tailing wastewater regulating tank, an ozone oxidation device, a coagulation-flocculation reaction tank and a physical filtering device which are sequentially connected and communicated, and further comprises a control unit and a viscosimeter, wherein a pipe for purified water obtained after filtration of the physical filtering device is connected with an ore sorting water inlet; ozone and wastewater are mixed at the ozone oxidation device; the coagulation-flocculation reaction tank is connected with an externally-connected PAC and PAM adding channel for flocculating PAM; the viscosimeter monitors the wastewater viscosity at the front end of the ozone oxidation device in real time; the control unit is electrically connected with an ozone supply flow control valve on the ozone oxidation device and the viscosimeter respectively. According to the characteristic that ore wastewater has relatively large turbidity, a viscometer is skillfully used for monitoring the viscosity of the wastewater before ozone oxidation real time, the viscosity is fed back to the control unit, and hereby the control unit controls the ozone supply flow in real time, so that an optimal effect is achieved.

Description

technical field [0001] The invention relates to a wastewater treatment system for ore washing operations, in particular to a PAM-containing tailings wastewater treatment circulation system and process, and belongs to the technical field of ore separation and wastewater treatment for ore washing operations. Background technique [0002] The ore pulp of the mineral processing enterprise needs to be concentrated and separated again after the ore washing operation. Sometimes, due to the change of ore properties, the ore pulp is difficult to settle in the thickener, and the thickener runs muddy, so that the concentration and fineness of the pulp in the carbon leaching system do not meet the standard, and the tailings The grade exceeds the standard, which seriously affects the production and wastes useful tailings components. In order to avoid the above problems, many domestic concentrators usually add a large amount of polyacrylamide (PAM) during the flotation process and tailing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
CPCC02F9/00C02F1/001C02F1/56C02F1/78C02F2103/10
Inventor 连会丽邱真真
Owner 上海铱钶环保科技有限公司
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