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Mineral processing tailing wastewater treatment method

A treatment method and wastewater technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor removal capacity of heavy metal ions, poor compressibility of polymers, and water quality problems To achieve the effect of shortening the coagulation time, reducing the content of heavy metal ions, and accelerating the sedimentation speed

Active Publication Date: 2015-03-25
SHUI KOU SHAN NONFERROUS METALS LTD
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Problems solved by technology

However, for mineral processing tailings wastewater with high turbidity and high suspended solids, the primary coagulation and sedimentation process is used for purification treatment. The amount of coagulant used is large, the coagulation effect is poor, the compressibility of the polymer is not strong, and the ability to remove heavy metal ions is poor. , the treated water quality does not meet the national wastewater comprehensive discharge standard GB25466-2010 first-level standard

Method used

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  • Mineral processing tailing wastewater treatment method
  • Mineral processing tailing wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0035] Add 800g of milk of lime to 1000ml of Kangjiawan mine dressing plant tailings wastewater to make the pH value of the tailings wastewater 8.2 to obtain destabilized wastewater. The composition of the tailings wastewater is shown in Table 1; 0.2wt% polyacrylamide aqueous solution, the amount of polyacrylamide added is 10mg / L, after 30 minutes of sedimentation, 400ml of tailings wastewater supernatant and flocs are obtained, and 10wt% polymeric sulfuric acid is added to the tailings wastewater supernatant For the aqueous iron solution, the amount of polyferric sulfate added is 10 mg / L, and purified water and flocs are obtained after settling for 30 minutes. The composition of the purified water was tested, and the test results were: pH value 8.26, Pb 0.28mg / L, Zn 0.18mg / L, SS 62mg / L, in line with the national wastewater comprehensive discharge standard GB25466-2010 first-level standard.

Embodiment 2

[0037] Add 1400g of milk of lime to 2000ml of Kangjiawan mine dressing plant tailings wastewater to make the pH value of the tailings wastewater 8.2 to obtain destabilized wastewater. The composition of the tailings wastewater is shown in Table 1; 0.5wt% polyacrylamide, the amount of polyacrylamide added is 10mg / L, after 30 minutes of sedimentation, 800ml of tailings wastewater supernatant and flocs are obtained, and a concentration of 15wt% polyacrylamide is added to the tailings wastewater supernatant Ferric sulfate aqueous solution, the addition amount of polyferric sulfate is 10mg / L, after settling for 30min, purified water and flocs are obtained. The composition of the purified water was tested, and the test results were: pH value 8.22, Pb 0.24mg / L, Zn 0.12mg / L, SS 58mg / L, in line with the national wastewater comprehensive discharge standard GB25466-2010 first-level standard.

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Abstract

The application provides a mineral processing tailing wastewater treatment method. The mineral processing tailing wastewater treatment method comprises the following steps: A), mixing the mineral processing tailing wastewater and a destabilizing agent to obtain destabilized wastewater; B), mixing the destabilized wastewater and a first coagulant and sedimenting to obtain tailing wastewater supernatant and flocs; and C), mixing the tailing wastewater supernatant and a second coagulant and sedimenting to obtain purified water. During the treatment of mineral processing tailing wastewater, the wastewater is firstly destabilized so that suspended solids in the tailing wastewater is free from the steady state and then the destabilized tailing wastewater is further purified by virtue of a two-stage coagulating sedimentation method in a connected-in-series manner so as to accelerate the formation and sedimentation of coarse particle polymers, the contents of the suspended solids and heavy metal ions in the wastewater are decreased in a short time and the environmentally acceptable discharge of the wastewater is achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for ore dressing tailings wastewater. Background technique [0002] The concentrator of Kangjiawan Mine uses black powder and xanthate as collectors, zinc sulfate and sodium carbonate as zinc inhibitors, copper sulfate as zinc activator, and lime as sulfur inhibitor to carry out flotation of lead, zinc and sulfur in the ore Separated to obtain lead concentrate, zinc concentrate and sulfur concentrate; while the discharge of mineral processing wastewater is 1200t / d, the wastewater contains 1.53mg / L of Pb, 1.98mg / L of Zn, 0.08mg / L of Cu, 0.042mg / L of Cd, 0.093mg / L of As, 18.6mg / L of Fe, 1.84mg / L of NH3-N, 211mg / L of SS (solid suspended matter), 92mg / L of CODcr (chemical oxygen demand amount), according to the content of ions in the above-mentioned waste water, it can be known that the above-mentioned mineral processing waste water is complex, the concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/5236C02F1/56C02F9/00
Inventor 田茂兵聂世华唐能斌
Owner SHUI KOU SHAN NONFERROUS METALS LTD
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