In-process circular and comprehensive recovery technology for mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores

A mineral processing wastewater and polymetallic technology, which is applied in mining wastewater treatment, energy wastewater treatment, chemical instruments and methods, etc., can solve the problems of large consumption of reagents, incomplete decontamination, secondary pollution, etc., and achieve good results and high production efficiency The effect of producing less mud and slag and occupying less land

Inactive Publication Date: 2013-02-20
GUANGXI GAOFENG MINE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The present invention provides a comprehensive recovery process for internal circulation of tin-lead-zinc polymetallic sulfide ore beneficiation wastewater, which solves

Method used

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  • In-process circular and comprehensive recovery technology for mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores
  • In-process circular and comprehensive recovery technology for mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores
  • In-process circular and comprehensive recovery technology for mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The tailings water is directly flowed from the concentrator to the tailings pond. After natural purification and degradation of various chemicals in the tailings pond, the water quality tends to be stable, and then it is pumped into the high-level pool and enters the mineral processing system. The natural settlement water quality analysis of tailings overflow water in the tailings pond is shown in Table 7-1.

[0038] Table 1: Water quality analysis results before and after natural degradation (mg / L)

[0039]

[0040] The tailings water was naturally placed for several days, and the water quality was analyzed before and after the placement. The results are shown in Table 7-1. It can be seen from Table 7-1 that after natural purification and degradation, heavy metal ions in tailings water can remove Pb 2+ In addition, there has been a decline.

Embodiment 2

[0042] The organic polymer coagulant PAM was used for the sedimentation test, and PAM was added as the coagulation and sedimentation agent. Under the condition of the current pH of the tailings sedimentation water = 9.10, the dosage experiment of PAM was carried out respectively. The experimental results are shown in Table 7-2.

[0043] Table 2: Effect of PAM dosage on coagulation and sedimentation effect

[0044]

[0045] It can be seen that with the increase of the amount of PAM, the indicators of the water samples have been significantly improved, the concentration of Pb in the sedimentation water decreased from 38.04mg / L to 2.21mg / L; the concentration of Zn decreased from 0.41mg / L to 0.24mg / L ; Cu concentration decreased from 0.93mg / L to 0.28mg / L; CODcr increased slightly, which was due to the addition of organic coagulant PAM.

Embodiment 3

[0047] Add a certain amount of PAM to the tailings sedimentation water after natural precipitation, and then add a certain amount of granular activated carbon after coagulation and precipitation, and examine the influence of adsorption time and adsorbent dosage on the adsorption effect. The results are as follows: The amount of granular activated carbon has an effect on adsorption The test results of effect influence are shown in Table 3

[0048] Table 3: Influence of the amount of granular activated carbon on the adsorption effect

[0049]

[0050] It can be seen from Table 3 that after adding 100mg / L granular activated carbon and stirring with wastewater for 30 minutes, the Pb concentration and COD in the effluent Cr Respectively from 0.85mg / L and 168.5mg / L to 0.75mg / L and 80.2mg / L, all lower than the national discharge standards, while the foaming of wastewater has weakened. This shows that granular activated carbon is quite effective for secondary purification of waste...

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Abstract

The invention discloses an in-process circular and comprehensive recovery technology for mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores. The technology includes primary treatment and secondary treatment, wherein the primary treatment is to coagulate and precipitate, comprising the step of adding a coagulant to remove suspended solid and metal ion, wherein some organic pollutants are removed at the same time; the secondary treatment is to carry out an adsorption method to remove flotation agent in the wastewater so as to further reduce the CODCr (Chemical Oxygen Demand) and foamability of the wastewater; and all water generated in the secondary treatment is recycled. The technology has the advantages of being simple in equipment, high in processing efficiency, high in adaptability, less in occupied area, and few in resulting sludge, and has higher effect of processing the mineral processing wastewater of tin-lead-zinc polymetallic sulphide ores; the polymeric ferric sulfate (PFS) and polyacrylamide (PAM) are selected and used as the compound coagulant to remove the pollutants such as the suspended solid and the metal ion during precipitating and removing the pollutants in the wastewater; and compared with single inorganic coagulant, the compound coagulant of the PFS and the PAM is low in dosage, good in effect, low in cost, and safe and nontoxic, and has no secondary pollution.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a recycling process for tin-lead-zinc polymetallic sulfide ore beneficiation wastewater. Background technique [0002] The world today is facing three major problems of population, resources and the environment. The worldwide environmental crisis is making mankind face unprecedented severe challenges, such as environmental pollution, ozone layer destruction, acid rain hazards, global warming, and sharp decline in biodiversity. It threatens the development of the world economy, human health and social stability. Water resources are an irreplaceable and important resource among all kinds of resources. Water resources are closely related to the environment and human development. Due to the rapid development of modern industry, industrial water pollution has become an important cause of environmental deterioration, so the problem of water resources has become one of the important is...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10
CPCY02W10/37
Inventor 覃文庆黎全邓金灿全柏飞姚茂文刘沛军霍锡晓康尹妮
Owner GUANGXI GAOFENG MINE IND
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