CN109607720A - A kind of processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method - Google Patents

A kind of processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method Download PDF

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Publication number
CN109607720A
CN109607720A CN201811604310.9A CN201811604310A CN109607720A CN 109607720 A CN109607720 A CN 109607720A CN 201811604310 A CN201811604310 A CN 201811604310A CN 109607720 A CN109607720 A CN 109607720A
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CN
China
Prior art keywords
reuse
beneficiation wastewater
processing
copper zinc
copper
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Pending
Application number
CN201811604310.9A
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Chinese (zh)
Inventor
杨玮
李明寅
龙涛
曹欢
张凯
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Application filed by Xian University of Architecture and Technology filed Critical Xian University of Architecture and Technology
Priority to CN201811604310.9A priority Critical patent/CN109607720A/en
Publication of CN109607720A publication Critical patent/CN109607720A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities

Abstract

The present invention relates to a kind of methods of copper zinc vulcanizing mine beneficiation wastewater processing and reuse, for copper zinc vulcanizing mine beneficiation wastewater, in such a way that sulfurization-precipitation method and coagulant sedimentation combine, i.e. waste water is quickly stirred through precipitating reagent vulcanized sodium and flocculating agent PAC, after addition flocculant CH2710 mixes slowly coagulating sedimentation afterwards, poisonous and harmful substance in beneficiation wastewater is greatly reduced, beneficiation wastewater is back to Flotation separation of copper from zinc after processing, not to copper, zinc concentrate grade and the rate of recovery have an adverse effect, be conducive to the reduction of Zn content in the raising and copper concentrate of the zinc concentrate rate of recovery instead, the consumption of part floating agent can also be saved simultaneously, reduce production cost.

Description

A kind of processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method
Technical field
The invention belongs to beneficiation wastewater processing and reuse technology field, in particular at a kind of copper zinc vulcanizing mine beneficiation wastewater Reason and reuse method.
Background technique
Mineral processing in China wastewater discharge is huge, it is estimated that, about 200,000,000 t of the discharge amount of annual beneficiation wastewater occupies non-ferrous metal row The 30% of industry institute waste discharge water inventory, and the handling rate of this effluent part is only 4.23%, remaining beneficiation wastewater is then by direct outlet. The random of beneficiation wastewater discharges not only greatly present environmental risks, but also will cause great lot of water resources waste.
In recent years, Environmental protection continues to increase, it is desirable that tailing is changed to dry row by wet row, avoids traditional tailing The drawbacks of wet row's technique beneficiation wastewater enters Tailings Dam, coloured industry Green Mine construction specification DZT 0320-2018 regulation: choosing Mine cycling utilization of wastewater rate is not less than 85% or realizes zero-emission, and non-ferrous metal industry Green Mine construction requirements stain disease is through locating Postponing needs sub-prime to recycle, and improves recycling water utilization rate, saves water resource, therefore realizes that beneficiation wastewater is innoxious and recycling is aobvious It obtains especially urgent and important.
If beneficiation wastewater is utilized without processing direct circulation, existing solid suspension in waste water, heavy metal ion and residual Remaining organic medicament etc. influences floatation indicators at branch's severe exacerbation flotation behavior, therefore will be in waste water it is necessary to adopt an effective measure It is difficult to degrade, it is difficult removal and substance influential on floatation indicators be effectively treated, processed waste water recycles.
At present about metal sulfide beneficiation wastewater treatment process pay close attention to it is more be lead zinc sulphur ore beneficiation wastewater place Reason, and the treatment process research for copper zinc vulcanizing mine beneficiation wastewater is less.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of copper zinc vulcanizing mine beneficiation wastewaters Copper is effectively reduced in conjunction with the coagulant sedimentation that current widely used sulfurization-precipitation method and application are mature in processing and reuse method The content of the ingredients such as solid suspension, heavy metal ion and remaining organic medicament in zinc beneficiation wastewater, is allowed to after reuse not shadow Copper zinc floatation process is rung, deteriorating effects are not generated to production target, realizes mineral processing waster water utilization and zero-emission.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method, comprising the following steps:
Step 1: a certain amount of precipitating reagent is added into copper zinc beneficiation wastewater, make the soluble heavy metal ions in waste water It is precipitated in the form of sulfide;
Step 2: continuing that flocculating agent is added into the beneficiation wastewater of addition precipitating reagent, stirs, make waste water unstability;
Step 3: being further continued for that flocculant is added in the waste water of unstability, stirring carries out coagulating sedimentation reaction;
Step 4: coagulating sedimentation is after the reaction was completed, natural subsidence takes supernatant to carry out Flotation separation of copper from zinc test, passes through Mineral processing production index measures water treatment effect, determines whether processed waste water can produce mineral processing production index during reuse Raw adverse effect, the supernatant are the recycle-water that can return to Flotation separation of copper from zinc process flow.
Preferably, in the step 1, precipitating reagent is vulcanized sodium, and additive amount 250g/t, precipitating reagent is with mass concentration 1% Solution addition.
Preferably, in the step 2, flocculating agent PAC, concentration of the effective component aluminium in waste water is 40g/t, is coagulated Poly- agent is added with the solution of mass concentration 10%.
Preferably, in the step 3, flocculant CH2710, concentration is 2g/t in waste water, and flocculant is with quality The solution of concentration 0.1% adds.
Preferably, in the step 2, mixing speed is controlled in 300r/min, mixing time about 15min.The step 3 In, mixing speed is controlled in 100r/min, mixing time about 15min.
Preferably, in the step 3, natural subsidence 8h.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention is for the alkaline copper containing a large amount of solid suspended particles, trace soluble heavy metal ion and organic matter Zinc beneficiation wastewater, unprocessed direct reuse can have an adverse effect to mineral processing index in flotation flowsheet, and through sulfurization-precipitation method After coagulant sedimentation integrated treatment, harmful substance is significantly reduced in waste water, and processed waste water recycles, not to copper, zinc essence Mine grade and the rate of recovery have an adverse effect, and are conducive to the drop of Zn content in the raising and copper concentrate of the zinc concentrate rate of recovery instead It is low, while the consumption of part floating agent can also be saved, reduce production cost.
2) it is few to combine the sulfurization-precipitation method quantity of slag by the present invention, and removal rate is high and coagulant sedimentation process flow is simple, management Convenient advantage.
Detailed description of the invention
Fig. 1 is beneficiation wastewater processing technological flow figure of the present invention.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment 1
Copper zinc vulcanizing mine beneficiation wastewater is through beneficiation wastewater water quality shape before and after sulfurization-precipitation method and coagulant sedimentation integrated treatment Condition is shown in Table 1.
1 beneficiation wastewater water quality condition of table
Note: discharge standard is with reference to sewage first discharge standard in GB8978-1996
The process of integrated treatment makes in waste water as shown in Figure 1, a certain amount of precipitating reagent is added into copper zinc beneficiation wastewater Soluble heavy metal ions precipitated in the form of sulfide;It then proceedes to be added into the beneficiation wastewater of addition precipitating reagent Flocculating agent, stirring, makes waste water unstability;Then it is further continued for that flocculant is added in the waste water of unstability, it is heavy to carry out coagulation for stirring It forms sediment and reacts;After the reaction was completed, natural subsidence takes supernatant to carry out Flotation separation of copper from zinc test to coagulating sedimentation.
Table 1 shows that beneficiation wastewater is heavy through precipitating reagent vulcanized sodium, flocculating agent PAC and flocculant CH2710 sulfide precipitation and coagulation Behind shallow lake, solid suspension, soluble heavy metal ions and reducing substances in waste water are significantly reduced, and reach national sewage level-one Discharge standard.
Embodiment 2
Beneficiation wastewater direct reuse and beneficiation wastewater are carried out after vulcanized sodium, flocculating agent PAC and flocculant CH2710 processing The flotation closed circuit flow comparative test of reuse, beneficiation wastewater after processing reuse and the unprocessed direct reuse of beneficiation wastewater to choosing The influence of mine index is shown in Table 2.
2 flotation closed-circuit test Comparative result of table
Table 2 shows the unprocessed direct reuse of beneficiation wastewater, Cu Concentrate Grade, the rate of recovery and zinc concentrate grade, the rate of recovery All not as good as the obtained mineral processing index of reuse after beneficiation wastewater processing, illustrate solid suspension in the beneficiation wastewater, heavy metal from Sub and other poisonous and harmful substances produce adverse effect to ore dressing process really, and by addition vulcanized sodium, flocculating agent PAC and Flocculant CH2710, which carries out coagulating sedimentation to waste water, can effectively reduce influence of the harmful substance to floatation indicators.
Embodiment 3
Choose Xinjiang copper zinc ore 2017 7,8, September part utilize fresh water normal production phase, ore dressing in April, 2018 Waste water unprocessed direct reuse stage, 2018 years 5, June select factory's wastewater treatment and reuse debugging stage and 2018 7, August Fen Xuan factory wastewater treatment and the production target of reuse normal production phase, reagent consumption are made to compare as follows, are shown in Table 3,4.
Table 3 selects factory to utilize different wet concentration mine production targets
Table 4 selects factory's reagent consumption to compare
2017 7 in contrast table 3,8, the mineral processing production index in September part and in April, 2018 is it is found that waste water is unprocessed Direct reuse causes to seriously affect to copper concentrate, zinc concentrate grade and the zinc concentrate rate of recovery.Comparison 2017 7,8, September part with 2018 7, the mineral processing production index of August part it is found that beneficiation wastewater processing system operates normally after, mineral processing production index and select factory The production target obtained using fresh water is close or even more excellent, 7, August part zinc concentrate rate of recovery all increased compared with 2017, and Zn content also decreases in copper concentrate.
In contrast table 4 different phase reagent consumption it is found that the consumption of in April, 2018 all medicaments all compared with 2017 Be significantly increased, 2018 7, August part beneficiation wastewater processing after reuse when, medicament BK404, second class xanthate, lime, copper sulphate are more sharp It is reduced with consumption when fresh water, BK201 and zinc sulfate consumption change less before and after waste water recycling, illustrate that beneficiation wastewater reuse has Conducive to saving reagent consumption.

Claims (10)

1. a kind of copper zinc vulcanizing mine beneficiation wastewater processing and reuse method, which comprises the following steps:
Step 1: a certain amount of precipitating reagent is added into copper zinc beneficiation wastewater, make the soluble heavy metal ions in waste water with sulphur The form of compound precipitates;
Step 2: continuing that flocculating agent is added into the beneficiation wastewater of addition precipitating reagent, stirs, make waste water unstability;
Step 3: being further continued for that flocculant is added in the waste water of unstability, stirring carries out coagulating sedimentation reaction;
Step 4: coagulating sedimentation is after the reaction was completed, natural subsidence, supernatant can reuse water.
2. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step 1 In, precipitating reagent is vulcanized sodium, additive amount 250g/t.
3. copper zinc vulcanizing mine beneficiation wastewater processing according to claim 1 or claim 2 and reuse method, which is characterized in that the step In rapid one, precipitating reagent is added with the solution of mass concentration 1%.
4. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step 2 In, flocculating agent PAC, concentration of the effective component aluminium in waste water is 40g/t.
5. according to claim 1 or the 4 copper zinc vulcanizing mine beneficiation wastewaters handle and reuse method, which is characterized in that the step In rapid two, flocculating agent is added with the solution of mass concentration 10%.
6. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step 2 In, mixing speed is controlled in 300r/min, mixing time about 15min.
7. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step 3 In, flocculant CH2710, concentration is 2g/t in waste water.
8. according to claim 1 or the 7 copper zinc vulcanizing mine beneficiation wastewaters handle and reuse method, which is characterized in that the step In rapid three, flocculant is added with the solution of mass concentration 0.1%.
9. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step 3 In, mixing speed is controlled in 100r/min, mixing time about 15min.
10. the processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method according to claim 1, which is characterized in that the step In three, natural subsidence 8h.
CN201811604310.9A 2018-12-26 2018-12-26 A kind of processing of copper zinc vulcanizing mine beneficiation wastewater and reuse method Pending CN109607720A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110563264A (en) * 2019-09-10 2019-12-13 湖南有色金属研究院 Method for recycling nonferrous multi-metal beneficiation wastewater

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CN102730885A (en) * 2012-07-23 2012-10-17 中南大学 Efficient flocculent precipitate purification method for polymetallic ore benefication wastewater
CN108503085A (en) * 2018-04-20 2018-09-07 广东华矿高新技术有限公司 The fractional precipitation process of iron/copper in a kind of recycling acidic mine waste water

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CN110563264A (en) * 2019-09-10 2019-12-13 湖南有色金属研究院 Method for recycling nonferrous multi-metal beneficiation wastewater

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