A Comprehensive Treatment Method and Device for Mineral Seepage Water and Mineral Processing Wastewater

Abstract

The present invention provides a comprehensive treatment method and device for mineral seepage water and ore dressing wastewater, which relates to the technical field of water treatment. Specifically, first, three specific wastewaters are mixed to obtain a raw material liquid; then, the pH is adjusted to 3.5 - 4.5, a catalyst and an oxidant are added and reacted fully to obtain a first reaction liquid; then, aeration treatment is carried out to obtain a second reaction liquid; a mixed emulsion of carbide slag and lime is added, the pH is adjusted to 7.5 - 8.5, and after full reaction, a third reaction liquid is obtained; then, a flocculant is added, and after full reaction, solid-liquid separation is carried out to obtain clarified discharged water. By adopting processes such as catalytic oxidation, aeration, and flocculation, the present invention realizes the comprehensive treatment of mining wastewaters with different properties, greatly reduces the cost of wastewater treatment, achieves a good removal effect for the complex types of pollutants in the wastewater, and further realizes the external discharge of the clarified water after treatment, having good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular, to a comprehensive treatment method and device for mineral seepage water and ore dressing wastewater. Background Art

[0002] With the large-scale development of high-grade copper sulfide ore resources, the comprehensive utilization of low-grade copper sulfide ore has gradually attracted attention. Low-grade copper sulfide ore is often recovered by heap leaching and flotation processes. A large amount of acidic wastewater is generated during the mineral stacking process. Acid mine wastewater has the characteristics of low pH value, high contents of heavy metals (such as Fe, Cu, Mn, etc.) and sulfates. If directly discharged, when this toxic mixture flows into groundwater, rivers and lakes, it will cause a series of environmental problems and also have a serious impact on human health.

[0003] Low-grade chalcopyrite often coexists with pyrite and molybdenite. At present, a large amount of lime is often added during the copper-sulfur flotation separation process, and the lime dosage is even as high as 50 kg / t. The addition of a large amount of lime makes the ore dressing return water contain a large amount of calcium ions, with high treatment costs and difficult reuse of the return water.

[0004] If the acidic wastewater in the mining area and the alkaline return water of the flotation process are mixed and used, the following technical problems mainly exist: First, the overflow water of the copper-sulfur separation concentrate is strongly alkaline, and the seepage water of the waste rock yard in the mining area is weakly acidic, with a large difference in the acid-base properties of the return water. Second, there are some fine-grained mineral particles in the overflow water of the copper-sulfur separation concentrate and the drainage of copper-molybdenum separation, which affect the treatment of the return water. Third, the two kinds of return water also include flotation reagent components and excessive metal ions (such as Cu 2+ 、Ca 2+ etc.). Therefore, if the return water is to be used in processes such as ore dressing production after mixing, it must be subjected to additional purification treatment before reuse; however, due to the complex composition of the return water, containing a large amount of heavy metal ions and sulfate minerals, as well as the fine suspended particles that are prone to form difficult-to-treat colloidal solutions, etc., all of which will lead to problems such as high purification treatment costs and a large amount of water to be treated, and there are certain technical difficulties.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The first object of the present invention is to provide a comprehensive treatment method for mineral seepage water and ore dressing wastewater. When targeting three specific types of wastewater, namely the acidic water seeping from the waste rock yard, the overflow wastewater from the copper and sulfur concentrate flotation ore dressing, and the alkaline wastewater from the copper-molybdenum separation, it can effectively solve the various defects that the acidic wastewater in the mining area and the alkaline wastewater from flotation cannot be directly neutralized and discharged. The present invention realizes the harmless discharge of the three kinds of ore dressing wastewaters by developing a green and efficient treatment process and providing supporting treatment agents, which has important significance in the fields of water treatment and environmental protection.

[0007] The second object of the present invention is to provide a treatment device for mineral seepage water and ore dressing wastewater, which can continuously and efficiently implement the comprehensive treatment method of the mineral seepage water and the ore dressing wastewater, and has good water purification efficiency and automation application prospects.

[0008] In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:

[0009] A comprehensive treatment method for mineral seepage water and ore dressing wastewater includes the following steps:

[0010] (1) Mix the acidic water from mineral heap leaching seepage, copper-sulfur ore dressing wastewater and copper-molybdenum ore dressing wastewater to obtain a raw material liquid; then adjust the pH of the raw material liquid to 3.5-4.5, add a catalyst and an oxidant and react fully to obtain a first reaction liquid;

[0011] (2) Aerate the first reaction liquid to obtain a second reaction liquid;

[0012] (3) Add a mixed emulsion of carbide slag and lime to the second reaction liquid, adjust the pH of the mixed liquid to 7.5-8.5, react fully and obtain a third reaction liquid;

[0013] (4) Add a flocculant to the third reaction liquid, react fully and then perform solid-liquid separation to obtain clarified discharge water.

[0014] A treatment device for mineral seepage water and ore dressing wastewater is used to carry out the comprehensive treatment method;

[0015] The treatment device includes a mixing unit, a first reaction unit, a second reaction unit, a flocculation unit and a precipitation unit which are connected in sequence.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) The present invention aims at three specific ore sources and ore dressing wastewaters, and realizes the comprehensive treatment of ore dressing wastewaters with different processes and properties by adopting treatment processes such as catalytic oxidation, aeration and flocculation, greatly reducing the wastewater treatment cost; at the same time, the present invention has good removal effects on the complex pollutant components in the wastewater, including copper-sulfur separation agents, copper-molybdenum separation agents and heavy metals, etc., and then realizes the external discharge of the clarified water after treatment, which is friendly to the water ecological environment.

[0018] (2) The catalyst and oxidant used in the present invention are degradable and widely sourced; through multi-stage cooperative oxidation, the present invention effectively avoids the impact of heavy metal ions in the return water on the flotation operation, ensures the beneficiation index, and greatly reduces the water volume, reagent addition amount, fresh water consumption, and wastewater volume carried away by the discharged pulp. In addition, by using a novel biological agent as the catalyst, a specific oxidant, and a polymer flocculant, the dosage of water treatment reagents can be reduced, and the water purification cost can be lowered.

[0019] (3) By adding a flocculant, the present invention reduces the content of fine particles in the overflow water, avoiding the high energy consumption caused by the circulation of fine particles in the return water or the impact on the flotation separation of polymetals; at the same time, the flocculant in the present invention has excellent sedimentation effect in treating ore dressing wastewater, solves the thorny wastewater challenges faced by industrial sustainable development, reduces environmental pollution, and promotes the wide application of the polymer flocculant PAM in the field of water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A feasible treatment device for mineral seepage water and ore dressing wastewater of the present invention is provided. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings and specific embodiments. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. For those conditions not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments not specified by the manufacturer are all conventional products that can be obtained through commercial purchase.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The first aspect of the present invention is to provide a comprehensive treatment method for mineral seepage water and ore dressing wastewater.

[0026] (1) Mix the acidic water from mineral heap leaching seepage, copper-sulfur ore dressing wastewater, and copper-molybdenum ore dressing wastewater to obtain a raw material liquid; then adjust the pH of the raw material liquid to 3.5 - 4.5, add a catalyst and an oxidant, and fully react to obtain a first reaction liquid.

[0027] As a preferred embodiment, the acidic water from mineral heap leaching seepage refers to the acidic wastewater generated during the leaching process after sulfuric acid treatment during the heap leaching treatment of low-grade copper sulfide minerals. In some more preferred embodiments, the elemental composition of the acidic water from mineral heap leaching seepage includes: TFe (total iron) 200 - 500 mg / L, Cu 20 - 40 mg / L, Mn 80 - 150 mg / L, Mg 100 - 150 mg / L.

[0028] As a preferred embodiment, the copper-sulfur ore dressing wastewater refers to the filtered water of the concentrate and the supernatant after tailings sedimentation involved in the copper-sulfur separation flotation treatment of low-grade porphyry copper sulfide minerals.

[0029] As a preferred embodiment, the copper-molybdenum ore dressing wastewater refers to the circulating water in which a large amount of sodium sulfide is added during the copper-molybdenum separation flotation treatment of chalcopyrite and molybdenite, resulting in excessive sulfides and polysulfides in the circulating water. In some more preferred embodiments, the composition of the copper-molybdenum ore dressing wastewater includes: S2O3 2- 4000 - 7000 mg / L, Sx 2- 40 - 120 mg / L, Na + 600 - 1000 mg / L.

[0030] As a preferred embodiment, the pH of the acidic water in the mineral heap leaching seepage is 3.0 - 4.5.

[0031] As a preferred embodiment, the pH of the copper sulfide ore dressing wastewater and / or the copper molybdenum ore dressing wastewater is 10.5 - 11.8, and the COD is 600 - 1200 mg / L.

[0032] As a preferred embodiment, the acid-base reagents (mainly alkali reagents) used for pH regulation include carbide slag and quicklime.

[0033] As a preferred embodiment, in the present invention, the catalyst is obtained by combining a composite functional microbial community mainly composed of Thiobacillus and inorganic compounds, containing a large number of functional groups such as hydroxyl, sulfhydryl, carboxyl, amino groups, etc.; wherein, the composite functional microbial community includes Thiobacillus denitrificans and Thiobacillus ferrooxidans, and the inorganic compound is nano-zinc oxide.

[0034] As a more preferred embodiment, the metabolites of the composite functional microbial community mainly include: the metabolites of Thiobacillus denitrificans and Thiobacillus ferrooxidans, and further the active ingredients mainly include ferric sulfate. In the present invention, by putting the composite functional microbial community into the raw material liquid, the growth of the microbial community is realized, and at the same time, the wastewater treatment is realized; in some alternative embodiments, the growth temperature of the composite functional microbial community is 28°C - 32°C, the pH range for the survival of the composite functional microbial community is the same as the pH range of the acidic and alkaline wastewater, and it can utilize redox sulfur compounds (such as elemental sulfur and reducing sulfur compounds) under aerobic conditions to obtain energy and the carbon source required for growth.

[0035] The composite functional microbial community adopted in the present invention widely exists in the acidic water in the mining area and is convenient to extract and culture; in the specific embodiment of the present invention, the composite functional microbial community can be added in the front-end acidic heap leaching stage to play a role in culturing the composite functional microbial community; at the same time, the composite functional microbial community takes the sulfide ore and withered grass and rotten wood in the heap leaching material pile as nutrients, and the metabolites include sulfuric acid, ferric sulfate, etc. Among them, the metabolite sulfuric acid can reduce the sulfuric acid consumption in heap leaching, and ferric sulfate can be used as an oxidation catalyst for water treatment; after the residual composite functional microbial community in the heap leaching acidic water is mixed with the alkaline water, it can take S 2- , NH4 + as nutrients, and the metabolites include SO4 2- , NO3 - , which can save the dosage of oxidants.

[0036] As a more preferred embodiment, the viable cell number ratio of the Thiobacillus denitrificans to the Thiobacillus ferrooxidans is (1-5):(2-10).

[0037] As a more preferred embodiment, the mass ratio of the ferric sulfate, which is a metabolite of the composite functional microbial community, to the inorganic compound is (5-9):(1-3).

[0038] As a preferred embodiment, the oxidant includes an aqueous solution of hydrogen peroxide, wherein the mass fraction / volume fraction of hydrogen peroxide is 27.5%-30%.

[0039] As a preferred embodiment, based on every 1 m 3 of the raw material liquid, the added mass of the catalyst is 0.2 kg - 0.3 kg, and the added mass of the oxidant is 1.0 kg - 1.2 kg.

[0040] As a preferred embodiment, the sufficient reaction in steps (1), (3), and (4) is carried out under any one or more auxiliary means such as stirring, oscillation, centrifugation, and ultrasonic; in a more preferred embodiment, the sufficient reaction in this step is carried out under stirring conditions, the stirring intensity is 25 rpm - 40 rpm, and the stirring time is 3 min - 5 min.

[0041] (2) Aerate the first reaction liquid to obtain a second reaction liquid.

[0042] As a preferred embodiment, the aeration treatment includes: introducing compressed air into the first reaction liquid; in some more preferred embodiments, stirring treatment is also carried out while performing the aeration treatment.

[0043] As a more preferred embodiment, the flow rate of the compressed air introduced is 5 m 3 / min - 10 m 3 / min, and the time of the aeration treatment is 15 min - 20 min.

[0044] As a further preferred embodiment, the frequency of the stirring treatment is 25 rpm - 30 rpm, and the time of the stirring treatment is the same as that of the aeration treatment.

[0045] (3) Add a mixed emulsion of carbide slag and lime to the second reaction liquid, adjust the pH of the mixed liquid to 7.5 - 8.5, react sufficiently and obtain a third reaction liquid.

[0046] As a preferred embodiment, in the mixed emulsion, the mass ratio of the carbide slag to the lime is (0.2 - 0.5):1, the total mass concentration of the carbide slag and the lime is 10% - 15%, and the solvent of the mixed emulsion includes water.

[0047] As a preferred embodiment, based on every 1 m 3 of the second reaction solution, the added mass of the mixed emulsion is 4.5 kg to 5.0 kg. It can be understood that in the present invention, after adding the mixed emulsion, the pH of the mixed solution can be achieved between 7.5 and 8.5, and no additional acid-base reagents are required for pH regulation.

[0048] As a more preferred embodiment, the sufficient reaction in this step is carried out under stirring conditions, the stirring intensity is 25 rpm to 40 rpm, and the stirring time is 15 min to 20 min.

[0049] (4) Add a flocculant to the third reaction solution, and after sufficient reaction, perform solid-liquid separation to obtain clarified discharged water.

[0050] As a preferred embodiment, the flocculant includes polyacrylamide (PAM); and the molecular weight of the polyacrylamide is ≥17 million, presenting a white granular solid state.

[0051] As a preferred embodiment, based on every 1 m 3 of the third reaction solution, the added mass of the flocculant is 2.8 kg to 3.5 kg.

[0052] As a preferred embodiment, the time of the sufficient reaction is 1 min to 2 min.

[0053] As a preferred embodiment, after adding the flocculant, when in a static reaction state, the sedimentation rate of the flocculent particles is 20 cm / min to 50 cm / min, and the light transmittance of the supernatant part after complete sedimentation is ≥95%.

[0054] As a preferred embodiment, the solid-liquid separation includes: performing precipitation and concentration through a thickener, and using the overflow of the thickener as the clarified discharged water (which can be used for ore dressing production or discharged from the self-discharge port); in some more preferred embodiments, for the underflow slurry of the thickener, part is refluxed to the second reaction solution, and part is discharged and stacked, and the reference ratio of the reflux amount is 20 wt.% to 30 wt.%.

[0055] As a preferred embodiment, the pH of the clarified discharged water is 6.5 to 7.5, COD < 60 mg / L, SS < 80 mg / L; further, the content of the pollutant components in the clarified discharged water includes: NH3-H < 2 mg / L, sulfide < 1.0 mg / L, Cu < 0.5 mg / L, and Ca is 200 to 300 mg / L.

[0056] The second aspect of the present invention lies in providing a treatment device for mineral seepage water and ore dressing wastewater, which is used for carrying out the comprehensive treatment method as described in the first aspect.

[0057] The described treatment device includes a mixing unit, a first reaction unit, a second reaction unit, a flocculation unit and a sedimentation unit which are connected in sequence.

[0058] As a preferred embodiment, each unit is connected by pipelines; and the flow of the liquid phase between the units is realized by the power of overflow water or by a pump connected to the pipelines.

[0059] As a preferred embodiment, the treatment device further includes an alkali emulsion storage unit and a flocculant storage unit; and the alkali emulsion storage unit is connected to the mixing unit by a pump, and the flocculant storage unit is connected to the flocculation unit by a pump.

[0060] As a preferred embodiment, stirring functional components are independently arranged inside the mixing unit, the first reaction unit and the second reaction unit.

[0061] As a preferred embodiment, pH control functional components are independently arranged inside the first reaction unit and the second reaction unit.

[0062] As a preferred embodiment, aeration functional components are independently arranged inside the first reaction unit, the second reaction unit and the flocculation unit.

[0063] As a preferred embodiment, the sedimentation unit includes a thickener and a sedimentation tank; the thickener is connected to the water outlet pipeline of the flocculation unit, the thickener is connected to the sedimentation tank; and the underflow pulp of the thickener is discharged to the sedimentation tank through a pipeline.

[0064] As a preferred embodiment, the sedimentation tank is connected to the mixing unit by a pump.

[0065] Example 1

[0066] The composition information of the wastewater used in this example is shown in Tables 1 to 3 below. Tables 1, 2 and 3 respectively correspond to the acidic water quality generated by the heap leaching seepage of copper sulfide ore, copper-sulfur ore dressing wastewater and copper-molybdenum ore dressing wastewater. In Tables 1 to 3, except for pH which is dimensionless, the rest of the indicators are average values, and the unit is mg / L.

[0067] Table 1

[0068]

[0069] Table 2

[0070] Index Name pH COD SS <![CDATA[Ca 2+ > <![CDATA[S 2- > Cl- Index Value 10.5 425 195 300 40 445

[0071] Table 3

[0072] Index Name pH COD SS <![CDATA[Ca 2+ > <![CDATA[S 2- > Cl- Index Value 11.3 900 200 310 225 450

[0073] This embodiment adopts Figure 1 The device shown performs wastewater purification.

[0074] (1) For heap leaching seepage acid water ( Figure 1 acidic water) and two types of mineral processing wastewater ( Figure 1 alkaline water) is fed into the mixing tank, the pH in the tank is controlled to 4.0 by a pH controller, and the catalyst and oxidant are added and stirred for 4 minutes at a stirring intensity of 30r / min. Among them, the catalyst is a combination of composite functional bacteria and nano zinc oxide (mass ratio 7:2), the composite functional bacteria are denitrifying thiobacillus and ferrothiobacillus (live bacteria ratio is 3:7), and the growth temperature of the composite functional bacteria is controlled to be 28℃~32℃; the oxidant is 30% H2O2 solution, and the catalyst addition amount is 0.2kg / m 3 Total water, oxidant dosage is 1.0kg / m 3 Total water.

[0075] (2) The overflow water in the mixing tank is pumped into the reaction tank 1, and a certain amount of compressed air is introduced and stirred to make it react completely. The compressed air volume is 10m 3 / min, stirring time is 20min, and stirring intensity is 25r / min.

[0076] (3) The overflow water in the reaction tank 1 is pumped into the reaction tank 2, and the emulsion of carbide slag and lime (mass ratio 0.3:1, total concentration 10%) is adjusted to pH 8.0 by controlling the amount of emulsion using a pH controller, with a stirring time of 20 minutes and a stirring intensity of 25 r / min.

[0077] (4) The overflow water in the reaction tank 2 is pumped into the flocculation tank by a pump, and the flocculant (PAM, molecular weight 18 million) is fed into the flocculation tank by a metering pump. The amount of flocculant is 3.0 kg / m 3 Total water, reaction time is 1.5min.

[0078] (5) The overflow of the flocculation tank is fed into a high-efficiency thickener for sedimentation and concentration. The overflow of the thickener, i.e., the clarified liquid, is the qualified discharge water and can be pumped to a high-level water tank for use in mineral processing production. The underflow of the thickener enters the sedimentation tank, of which 25wt.% of the mud is used as circulating slurry and returned to the mixing tank, and the rest is discharged and stored. After testing, the parameter indicators of the clarified liquid (qualified discharge water) are shown in Table 4. In Table 4, except for pH, which is dimensionless, the units of the other indicators are mg / L.

[0079] Table 4 Qualified discharge water quality

[0080] Index Name pH COD Cu TFe Pb Zn Index Value 7.5 45 ≤0.5 ≤15 ≤0.2 ≤0.1 Index Name Mn <![CDATA[SO4 2 -]]> SS <![CDATA[Ca 2+ > <![CDATA[S 2- > Cl- Index Value ≤2 ≤3000 45 ≤400 ≤1.0 ≤30

[0081] Example 2

[0082] This example uses the same wastewater and device as Example 1; and the treatment method flow of this example is basically the same as that of Example 1, the difference is only that:

[0083] Step (1): Use a pH controller to control the pH in the tank to 3.5;

[0084] Step (3): Use a pH controller to adjust the pH to 7.5.

[0085] Example 3

[0086] This example uses the same wastewater and device as Example 1; and the treatment method flow of this example is basically the same as that of Example 1, the difference is only that:

[0087] Step (1): Use a pH controller to control the pH in the tank to 4.5;

[0088] Step (3): Use a pH controller to adjust the pH to 8.5.

[0089] Example 4

[0090] This example uses the same wastewater and device as Example 1; and the treatment method flow of this example is basically the same as that of Example 1, the difference is only that:

[0091] Step (1): The catalyst is a combination of composite functional flora and nano-zinc oxide (mass ratio 5:1), the composite functional flora is Thiobacillus denitrificans and Thiobacillus ferrooxidans (the viable cell number ratio is 1:2), the oxidant is 30% H2O2 solution, the catalyst dosage is 0.3 kg / m 3 total water, and the oxidant dosage is 1.2 kg / m 3 total water.

[0092] Example 5

[0093] This example uses the same wastewater and device as Example 1; and the treatment method flow of this example is basically the same as that of Example 1, the difference is only that:

[0094] Step (2): The compressed air volume is 5 m 3 / min, the stirring time is 15 min, and the stirring intensity is 30 r / min.

[0095] Example 6

[0096] This embodiment uses the same wastewater and device as in Embodiment 1; and the treatment method flow of this embodiment is basically the same as that of Embodiment 1, with the only difference being that:

[0097] Step (4): The dosage of the flocculant is 3.5 kg / m 3 total water, and the reaction time is 1 min.

[0098] The clarified liquid (up-to-standard discharge water) obtained in Embodiments 1 to 6 was detected. After detection, its parameter indicators are shown in Table 5.

[0099] Table 5

[0100]

[0101]

[0102] Although the present invention has been illustrated and described with reference to specific embodiments, it should be realized that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; those of ordinary skill in the art should understand that: without departing from the spirit and scope of the present invention, the technical solutions described in the foregoing embodiments can be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention; therefore, this means that all such replacements and modifications that fall within the scope of the present invention are included in the appended claims.

Claims

1. A comprehensive treatment method for mineral seepage water and ore dressing wastewater, characterized in that, The comprehensive treatment method includes the following steps: (1) Mix the acidic water from mineral heap leaching seepage, copper-sulfur ore dressing wastewater, and copper-molybdenum ore dressing wastewater to obtain a raw material liquid; then adjust the pH of the raw material liquid to 3.5 - 4.5, add a catalyst and an oxidant, and react fully to obtain a first reaction liquid; The acidic water from mineral heap leaching seepage refers to: acidic wastewater generated during the leaching process after sulfuric acid treatment of low-grade copper sulfide minerals during heap leaching treatment; The copper-sulfur ore dressing wastewater and / or the copper-molybdenum ore dressing wastewater include: S2O3 2- 4000 - 7000 mg / L, S x 2- 40 - 120 mg / L, Na + 600 - 1000 mg / L; The catalyst includes a composite functional microbial community and an inorganic compound; wherein, the composite functional microbial community includes Thiobacillus denitrificans and Thiobacillus ferrooxidans, and the inorganic compound includes nano zinc oxide; based on every 1 m 3 of the raw material liquid, the dosing mass of the catalyst is 0.2 kg to 0.3 kg; (2) Aerate the first reaction liquid to obtain a second reaction liquid; The aeration treatment includes: introducing compressed air into the first reaction liquid; the introduction amount of the compressed air is 5 m 3 / min to 10 m 3 / min, and the time of the aeration treatment is 15 min to 20 min; (3) Add a mixed emulsion of carbide slag and lime to the second reaction liquid, adjust the pH of the mixed liquid to 7.5 - 8.5, react fully, and obtain a third reaction liquid; In the mixed emulsion, the mass ratio of carbide slag to lime is (0.2 - 0.5):1; (4) Add a flocculant to the third reaction liquid, react fully, and then perform solid-liquid separation to obtain clarified discharge water.

2. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that In the acidic water from mineral heap leaching seepage, it includes: TFe 200 - 500 mg / L, Cu 20 - 40 mg / L, Mn 80 - 150 mg / L, Mg 100 - 150 mg / L.

3. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that, The oxidant includes an aqueous solution of hydrogen peroxide; Based on every 1 m 3 Taking the raw material liquid as the reference, the added mass of the oxidant is 1.0 kg to 1.2 kg.

4. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that Per 1 m 3 Based on the second reaction solution meter, the added mass of the mixed emulsion is 4.5 kg to 5.0 kg.

5. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that, The flocculant includes polyacrylamide, and the molecular weight of the polyacrylamide ≥ 17 million.

6. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that, Per 1 m 3 Based on the third reaction solution, the added mass of the flocculant is 2.8 kg to 3.5 kg.

7. The comprehensive treatment method of mineral seepage water and ore dressing wastewater according to claim 1, characterized in that, The pH of the clarified discharge water is 6.5 - 7.5, COD < 60 mg / L, SS < 80 mg / L; And / or, in the clarified discharge water, the concentration of NH3-N is less than 2 mg / L, the concentration of sulfide is less than 1.0 mg / L, the content of Cu element is less than 0.5 mg / L, and the content of Ca is 200 mg / L - 300 mg / L.

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