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Polymetallic-ore-dressing wastewater coagulating sedimentation device and method

A technology of mineral processing wastewater and coagulation and sedimentation, which is applied in the fields of mining wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the large difference in mineral processing wastewater treatment, the effluent cannot meet the reuse requirements, and the mineral processing wastewater is difficult to be efficient Problems such as flocculation and clarification, to achieve the effect of reducing equipment footprint, increasing contact time, and efficient separation

Active Publication Date: 2013-07-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The associated minerals and occurrence characteristics of different non-ferrous metal ores are different, and the use of different beneficiation processes and beneficiation reagent systems results in large differences in the treatment of beneficiation wastewater
In polymetallic ore flotation operations, residual water glass and other flotation agents make it difficult to efficiently flocculate and clarify mineral processing wastewater, and the effluent is difficult to meet the requirements for reuse

Method used

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  • Polymetallic-ore-dressing wastewater coagulating sedimentation device and method
  • Polymetallic-ore-dressing wastewater coagulating sedimentation device and method
  • Polymetallic-ore-dressing wastewater coagulating sedimentation device and method

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Effect test

Embodiment 1

[0038] Example 1: A unit treatment test of 30L of raw wastewater was carried out in a coagulation reaction tank. The pH value of the tested polymetallic ore dressing wastewater is 7.6, SS117g / L, COD280mg / L, heavy metals As1.05mg / L, Pb25.1mg / L, Be8.2mg / L in the wastewater. Add 30L of raw wastewater into the coagulation reaction tank, and pump in the liquid coagulant polysilicate aluminum ferric sulfate, and the pumped amount of the coagulant solution with a mass concentration of 8.4g / L (calculated as aluminum) accounts for the total volume of the wastewater The percentage example is 1%, the stirring speed is controlled at 200rpm, and the reaction is 2min; then pump the coagulant aid mainly based on methyl cellulose, and the pumping amount of the coagulant aid with a mass concentration of 1g / L accounts for the percentage of the total volume of the wastewater For example, 0.5%, then react for 2 minutes, after standing for 1 minute, take the supernatant water for testing, the pH v...

Embodiment 2

[0039] Embodiment 2: Utilize the pilot test system designed according to the present invention, carry out flow and be 100m 3 / h, continuous 2h pilot test. Adopt the waste water water quality with embodiment 1. The beneficiation wastewater and the polyaluminum chloride-based coagulant are simultaneously pumped into the coagulation reaction tank through the sewage pump, and the pumped volume of the coagulant solution with a mass concentration of 27g / L accounts for 1.5% of the total volume of the wastewater. , the stirring speed was controlled at 300rpm, and the reaction time was 2min. The waste water after the coagulation reaction is pumped into the coagulation aid mainly composed of polyacrylamide into the flocculation-sedimentation-separation integrated device in the delivery pipeline. The percentage of the total volume of wastewater is 0.5%, the stirring speed is controlled at 200rpm, and the reaction is 2min; the suspended solids in the wastewater are coarsened by floccula...

Embodiment 3

[0040] Embodiment 3: Utilize the pilot test system designed according to the present invention, carry out flow and be 100m 3 / h, continuous 3h pilot test. Adopt the waste water water quality with embodiment 1. The beneficiation wastewater and the polyaluminum chloride-based coagulant are simultaneously pumped into the coagulation reaction tank through the sewage pump, and the pumped volume of the coagulant solution with a mass concentration of 27g / L accounts for 1.5% of the total volume of the wastewater. , the stirring speed was controlled at 300rpm, and the reaction time was 2min. The waste water after the coagulation reaction is pumped into the coagulation aid mainly composed of polyacrylamide into the flocculation-sedimentation-separation integrated device in the delivery pipeline. The percentage of the total volume of wastewater is 0.5%, the stirring speed is controlled at 200rpm, and the reaction time is 2min; the suspended solids in the wastewater are coarsened by flo...

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Abstract

The invention discloses a polymetallic-ore-dressing wastewater coagulating sedimentation device and a polymetallic-ore-dressing wastewater coagulating sedimentation method. The process comprises the following main devices: a coagulation reaction tank, a flocculation, sedimentation and separation integrated device and a separation wall. The process flows are as follows: the polymetallic-ore-dressing wastewater fully reacts with a coagulant in the coagulation reaction tank to enable the wastewater to be destabilized quickly and flocculated efficiently; the coagulated wastewater enters the flocculation, sedimentation and separation integrated device to fully react with coagulant aid to further perform flocculation coarsening and fast sedimentation, so that high-efficiency mud-water separation is realized; and the processed wastewater is discharged directly or deeply purified by the separation wall to be recycled. The device and the method can effectively solve the problems that in the polymetallic-ore-dressing wastewater treatment, the flocculent precipitation is instable, the flocculation time and sedimentation time are long and the like, and can quickly perform destabilization and realize high-efficiency flocculation, high-efficiency sedimentation and high-efficiency separation. The device and the process flow are simple and practical, the wastewater purifying efficiency can be remarkably improved and the effluent water quality is stable and reaches the standard.

Description

technical field [0001] The invention relates to a polymetallic ore dressing wastewater coagulation sedimentation device and method. Background technique [0002] In the beneficiation process of non-ferrous metals, 1 ton of ore is treated by flotation, and the general water is 4-7m 3 , Gravity separation method uses 20-26m of water 3 , flotation-magnetic separation method of water 23 ~ 27m 3 , re-election-flotation water 20 ~ 30m 3 , the water consumption is huge. A large amount of beneficiation wastewater flows out of the beneficiation plant in the form of tailings slurry along with the tailings. Due to the high content of suspended solids in the mineral processing wastewater, there are many types of flotation agents with high concentrations, and there are many types of heavy metals with high toxicity. If the mineral processing wastewater is directly discharged into natural water bodies, it will inevitably cause serious pollution to the water environment. serious potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
Inventor 郭朝晖李康康蒋凯琦肖细元姜智超袁珊珊
Owner CENT SOUTH UNIV
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