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Catalytic pre-oxidation treatment and reuse technology of refractory biochemical and high-salt mine beneficiation wastewater

A technology for pre-oxidation treatment and wastewater treatment, applied in mining wastewater treatment, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of filler agglomeration, high cost, passivation, etc. The effect of high sedimentation and breakthrough of technical bottlenecks

Active Publication Date: 2016-08-24
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, solving the problems of filler agglomeration, passivation and high cost faced by iron-carbon micro-electrolytic oxidation technology is the main problem faced by this technology in industrial wastewater treatment.

Method used

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  • Catalytic pre-oxidation treatment and reuse technology of refractory biochemical and high-salt mine beneficiation wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A mineral processing plant in the Yunnan-Guizhou Plateau, due to the implementation of the zero discharge system, all kinds of production and domestic sewage enter the tailings pond. The average COD concentration of the tailings pond fluctuates between 1000 and 1500 mg / L. The wastewater BOD / COD is lower than 0.3, which is difficult Biochemical waste water with high salt content has high hardness and salinity, so it cannot be directly discharged and recycled.

[0033] Preparation of ozone catalyst: use a vacuum pump to control the pressure of the reaction chamber to be less than 100Pa; the cathode uses a graphite disc with a diameter of 50 mm, and the anode uses a graphite rod with a diameter of 10 mm and a length of 250 mm. One end of the graphite rod is drilled with a diameter of 2 mm and a depth of It is a hollow hole of 200mm, which is filled with a uniform mixture of nickel powder and manganese powder, and the mass ratio of nickel powder and manganese powder in the u...

Embodiment 2

[0042] The COD concentration of wastewater from a certain mine is 1800-2500mg / L, which is biochemically difficult and high-salinity wastewater, which cannot be directly discharged and recycled.

[0043] Preparation of ozone catalyst: use a vacuum pump to control the pressure of the reaction chamber to be less than 100Pa; the cathode adopts a graphite disc with a diameter of 60mm, and the anode adopts a graphite rod with a diameter of 8mm and a length of 270mm. One end of the graphite rod is drilled with a diameter of 1.5mm. A hollow hole with a depth of 220mm is filled with a uniform mixture of nickel powder and manganese powder, and the mass ratio of nickel powder and manganese powder in the uniform mixture is 2.5:3.5; open the cooling water in the reaction chamber, control The distance between the anode and the cathode is 1mm, and the discharge current intensity is controlled to be 75-80A; when the anode graphite rod consumes 220mm, the reaction is stopped, and after cooling ...

Embodiment 3

[0049] In a concentrator, the COD concentration of wastewater is 800-1200mg / L, and the water has high hardness and salinity, so it cannot be directly discharged and recycled.

[0050] The preparation of ozone catalyst: adopt vacuum pump to control reaction cavity pressure to be less than 100Pa; Cathode adopts the graphite disk that diameter is 40mm, and anode adopts the graphite rod that diameter is 12mm, and length is 230mm, and one end of this graphite rod is drilled with diameter is 2.5mm, A hollow hole with a depth of 180 mm is filled with a homogeneous mixture of nickel oxide and manganese oxide, and the mass ratio of nickel element to manganese element in the homogeneous mixture is 1.5:2.5; open the reaction chamber cooling water, control The distance between the anode and the cathode is 3mm, and the discharge current intensity is controlled to be 85-90A; when the anode graphite rod consumes 180mm, stop the reaction, after cooling to room temperature, turn off the cooling...

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Abstract

The invention discloses a catalytic pre-oxidation treatment and reuse technology of refractory high-salt mine dressing and smelting wastewater. Using the nano-carbon-based nickel-manganese ozone catalyst provided by the invention, the combined treatment process of ozone catalytic oxidation and micro-electrolytic oxidation can be used. Effectively treat the difficult-to-biochemical, high-salt, and high-COD mine dressing and smelting wastewater. The COD value of the effluent after treatment is 20-50mg / L, which meets the requirements of on-site reuse, breaks through the long-term technical bottleneck of this type of wastewater treatment, and expands the ozone Application of oxidation wastewater treatment technology in the field of wastewater treatment with ozone free radical inhibitors; and the wastewater treatment process of the present invention is simple, high in processing efficiency, low in cost, environmentally friendly, and easy to realize automatic control, and is especially suitable for remote, transportation The inconvenient field of mine wastewater treatment is also suitable for the treatment of general dressing and metallurgy, chemical industry, printing and dyeing, electroplating, petrochemical and other wastewater, and is widely used.

Description

technical field [0001] The invention relates to the technical field of mine dressing and smelting wastewater treatment, in particular to a catalytic pre-oxidation treatment and reuse method for refractory high-salt mine dressing and smelting wastewater. Background technique [0002] Mine dressing and smelting wastewater has the characteristics of large water volume, complex composition, high COD (chemical oxygen demand), difficult biochemistry, and high treatment cost. The main pollutants include organic chemicals, oil, acid pollution, cyanide, heavy / metalloids, etc. At present, the commonly used wastewater treatment processes include neutralization method, chemical oxidation method, biological method, coagulation method and membrane technology. The high degree also limits the input of membrane technology, so at present, chemical oxidation methods are mainly used to treat mine dressing and smelting wastewater, such as Fenton reagent oxidation method, ozone oxidation method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/78C02F1/461C02F9/06C02F103/10
Inventor 季常青黄怀国林鸿汉张卿甘永刚张波陈启斌谢洪珍马龙叶志勇
Owner 厦门紫金矿冶技术有限公司
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