CN116116881A - Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues - Google Patents
Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues Download PDFInfo
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- CN116116881A CN116116881A CN202310044143.1A CN202310044143A CN116116881A CN 116116881 A CN116116881 A CN 116116881A CN 202310044143 A CN202310044143 A CN 202310044143A CN 116116881 A CN116116881 A CN 116116881A
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 55
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000002351 wastewater Substances 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 title claims abstract description 36
- 239000004575 stone Substances 0.000 title claims abstract description 36
- 238000003723 Smelting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002699 waste material Substances 0.000 title claims abstract description 28
- 238000000605 extraction Methods 0.000 title claims abstract description 27
- 239000002893 slag Substances 0.000 claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims description 31
- 238000012986 modification Methods 0.000 claims description 31
- 238000000746 purification Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 7
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 abstract description 6
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract 2
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 17
- 239000000395 magnesium oxide Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910017625 MgSiO Inorganic materials 0.000 description 1
- VWBLQUSTSLXQON-UHFFFAOYSA-N N.[V+5] Chemical compound N.[V+5] VWBLQUSTSLXQON-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/55—Slag
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention discloses a method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues, which comprises the steps of utilizing a step-type tunnel kiln to modify purified slag produced in a stone coal vanadium extraction smelting process except for heterocyclic joints at a high temperature of 880-920 ℃ for 24 hours, so as to obtain MgO and SiO 2 Modified slag which is a main component and has good dispersibility. Modifying the mixtureBall milling the slag to fine particle powder, taking 100ml of lead-containing wastewater containing 100-120 mg/L of lead from a sewage station of a lead smelting enterprise as a target, adding 0.15-0.20 g of modified slag ball milling powder into 100ml of lead-containing wastewater, and carrying out oscillating reaction for 2h at the temperature of 30-40 ℃ in a water bath, wherein the lead removal rate is over 99%. The invention not only realizes the harmless treatment of the stone coal vanadium extraction waste residue, solves the environmental pollution caused by a large amount of stockpiling, but also saves the cost in the aspect of waste water treatment by using the stone coal vanadium extraction waste residue in the aspect of lead-containing waste water treatment, has the advantages of treating waste by waste and comprehensively utilizing resources, and is suitable for being applied to the fields of stone coal vanadium extraction and water treatment.
Description
Technical Field
The invention relates to the technical field of chemical metallurgical treatment, in particular to a method for treating lead-containing wastewater by stone coal vanadium extraction smelting waste residues.
Background
Stone coal vanadium ore is an important vanadium metal resource, and among metal vanadium which has been ascertained in China, stone coal vanadium ore accounts for 87% of the total vanadium reserves, so that the extraction of vanadium from stone coal is an important way for obtaining metal vanadium in China. The main process for extracting vanadium from stone coal comprises the following steps: decarburization, oxidation roasting, sulfuric acid leaching, ion exchange, purification and impurity removal, ammonium salt vanadium precipitation, high-temperature calcination and the like of vanadium ore, wherein high-viscosity purified slag produced by purification and impurity removal of heterocyclic joints is one of main solid wastes for extracting vanadium from stone coal. The solid waste has no effective method in recycling, and if the solid waste can be subjected to harmless treatment and resource utilization, the problems can be solved to a great extent.
After ion exchange is finished in the process of extracting vanadium from stone coal, the pH value of the vanadium-containing solution is maintained between 8.0 and 9.5, under the condition, impurities such as silicon and phosphorus in the vanadium-containing solution are removed by adding magnesium oxide and aluminum sulfate, and the main component of the purified slag is a complex compound formed by silicon, phosphorus, vanadium and magnesium after the impurity removal is finished. The compound has high viscosity, high alkalinity and high water content, the vanadium content is between 2.5 and 4.5 percent, and the compound has high recovery value, but stone coal vanadium extraction enterprises still adopt a piling mode to treat the purified slag. Most stone coal vanadium extraction enterprises adopt a water washing and acid washing method to recover vanadium from the purified slag so as to reduce the metal loss and alkalinity, the vanadium content of the recovered secondary purified slag is reduced to about 0.6-1.1%, but the physical and chemical properties of the secondary purified slag are not changed greatly, the problems of large alkalinity, large viscosity and high vanadium content still exist, and the washing method cannot fundamentally eliminate the harm of the purified slag to the environment.
Along with stricter lead-containing wastewater discharge standards produced by the lead smelting industry, the current lead smelting enterprise wastewater discharge labeling requirement for Pb concentration is less than or equal to 0.5mg/L. At present, enterprises mostly adopt a method of lime neutralization and pH adjustment to lead Pb into gypsum slag in a precipitation form to remove lead, but lead-containing wastewater with low pH consumes a large amount of lime, so that the cost of wastewater treatment is greatly increased, and a low-cost and high-efficiency lead removing reagent is found to be a necessary way for high-quality development of lead smelting enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing the method for cooperatively treating the lead-containing wastewater by utilizing the modified stone coal vanadium extraction smelting waste slag, which has the advantages of good treatment effect, lower cost and no secondary production of purified slag.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste slag is characterized by comprising the following steps: the method comprises the following steps:
step 1: purifying slag produced in the process of extracting vanadium from stone coal and removing heterocyclic ring is used as a raw material, the purifying slag is subjected to high-temperature modification roasting, and the high-viscosity silicate and vanadate purifying slag is converted into dissociated MgO and SiO with good dispersibility after modification 2 The harmless high-temperature modification treatment of the stone coal vanadium extraction smelting waste residue is completed;
step 2: ball milling the modified purified slag obtained in the step 1 until the mesh size of the purified slag is-200 and the proportion is more than 95%; and (3) taking the ball-milled modified slag as a raw material for treating the lead-containing wastewater, adding 0.15-0.20 g of the ball-milled modified slag into each 100ml of the lead-containing wastewater, oscillating for 2 hours when the ball-milled modified slag is heated to 30-40 ℃ in a water bath, and carrying out solid-liquid separation after the reaction is finished to obtain the waste liquid and the lead-containing slag which meet the standard discharge value.
The purification slag in the step 1 is derived from purification slag produced by removing heterocyclic joints in the stone coal vanadium extraction smelting process, and the main components of the purification slag are silicate and vanadate compounds, wherein before modification, the V content is 2.5-4.5%, the Si content is 5.5-6.2%, the P content is 14.01-15.87%, and the Mg content is 16.00-18.50%.
In the step 2, the lead-containing wastewater is derived from lead smelting wastewater, the lead content of the lead-containing wastewater is 100-120 mg/L, and the pH value of the lead-containing wastewater is 4.5-5.5.
In the step 1, the modification roasting temperature is controlled between 880 and 920 ℃, and the modification time is controlled at 24 hours.
The purpose of the modification is to obtain dissociated modified slag with good dispersibility, and to treat lead-containing wastewater from lead smelting by using the dissociated modified slag. The step tunnel kiln is used as modification equipment, the purification slag is dehydrated and phase-transformed at high temperature, so that the purposes of harmlessness and recycling of the purification slag are achieved, and the reaction mechanism is as follows:
selecting purified slag after multiple water washing, and converting the modified purified slag into dissociated MgO and SiO with good dispersibility 2 The moisture is completely volatilized, which indicates that the modification process is beneficial to recycling of the purified slag.
The main component of the purified slag raw material is Mg (VO 3 ) 2 、MgSiO 3 And SiO 2 After high temperature modification, the main components are converted into MgO and SiO 2 。
The content of the elements of the purified slag after modification is shown in the following table
The main element of the modified purification slag is O, na, mg, si, V, mg mainly exists in the form of MgO, and Si mainly exists in the form of SiO 2 Is present in the form of (c). Compared with the existence form of Mg and Si in the purified slag before modification, the purified slag after modification is mostly dispersed single oxide, and is fully dissociated.
The invention has the advantages that: 1) The invention adopts the stepping tunnel kiln for the vanadium extraction and oxidation roasting of stone coal to carry out modification, and the required equipment conditions are all existing, so that the invention is easy to satisfy, and can avoid secondary large-scale investment, thereby reducing the cost;
2) The invention utilizes high temperature to modify the smelting waste slag of stone coal vanadium extraction, and can convert silicate and vanadate with high viscosity into dissociated MgO and SiO 2 Solves the problem that the high-viscosity composite salt vanadium smelting waste slag can only be piled up. Compared with the washing treatment, the invention can realize the complete harmless and resource utilization of the purified slag, and the purified slag can not be produced for the second time;
3) The modified purification slag has good treatment effect on lead-containing wastewater of lead smelting enterprises, can realize the purpose of treating waste with waste, solves the environmental problem of the storage treatment of the purification slag, and reduces the treatment cost of the lead-containing wastewater.
Drawings
FIG. 1 is a graph showing the energy spectrum of the modified slag, wherein the main element of the modified slag is O, na, mg, si, V, mg is mainly in the form of MgO, and Si is mainly SiO 2 Compared with the existence form of Mg and Si in the purified slag before modification, the purified slag after modification is mostly dispersed single oxide and fully dissociated;
FIG. 2 is a morphology diagram of the modified purified slag, wherein the modified purified slag is in a regular rod-shaped staggered lamination structure, the length of fiber rods is more between 7.01 and 9.48 mu m, and sufficient gaps are reserved in the middle of the staggered lamination structure.
Detailed Description
The invention is further illustrated by the following examples, taken in conjunction with the accompanying drawings:
example 1: the purifying slag in the embodiment is selected from vanadium-containing purifying slag produced in the purifying and impurity-removing process of the enterprises of Gansu Jiuquan certain stone coal vanadium extraction, and the purifying slag contains 1.1% of vanadium, 80.13% of water and 8.5 of pH value after being washed and roasted at high temperature. The lead-containing wastewater is obtained from lead-containing waste liquid produced by a certain lead smelting plant in Qinghai, the lead concentration is 100mg/L, and the pH is 4.8. The method comprises the following steps:
step 1: the purification slag produced in the process of extracting vanadium from stone coal and removing heterocyclic ring is used as raw material, the purification slag is subjected to high-temperature modification roasting, the modification roasting temperature is controlled to be 880 ℃, the modification time is controlled to be 24 hours, and the purification slag of silicate and vanadate with high viscosity is converted into dissociated MgO and SiO with good dispersibility after modification 2 The harmless high-temperature modification treatment of the stone coal vanadium extraction smelting waste residue is completed;
step 2: ball milling the modified purified slag obtained in the step 1 until the mesh size of the purified slag is-200 and the proportion is more than 95%; the modified slag after ball milling is used as a raw material for removing lead-containing waste liquid. Adding 0.15g of ball-milled modified slag into 100ml of wastewater containing 100mg/L of lead, oscillating for 2 hours when the wastewater is heated to 40 ℃ in a water bath, and after the reaction is finished, carrying out solid-liquid separation to detect the lead concentration in the solution. The lead removal effect is shown in the following table:
as shown in the table above, the modified purification slag has good treatment effect on lead-containing wastewater, and when 0.15g of the modified purification slag is treated for 2 hours, the lead removal rate reaches 99.99 percent, which is lower than the standard of 0.5mg/L discharged by lead smelting enterprises.
Example 2: the purifying slag in the embodiment is selected from vanadium-containing purifying slag produced in purifying and impurity removing processes of enterprises in Gansu Jiuquan certain places stone coal vanadium extraction. The purified slag is washed with water and roasted at high temperature to modify, contains 0.7% of vanadium, contains 77.46% of water, has pH of 8.2, and has large alkalinity and viscosity, and is milky. The lead-containing wastewater is obtained from lead-containing waste liquid produced by a certain lead smelting plant in Qinghai, the lead concentration is 120mg/L, the pH is 5.1, and the method comprises the following steps:
step 1: the purification slag produced in the process of extracting vanadium from stone coal and removing heterocyclic ring is used as raw material, the purification slag is subjected to high-temperature modification roasting, the modification roasting temperature is controlled at 920 ℃, the modification time is controlled at 24 hours, and the purification slag of silicate and vanadate with high viscosity is converted into dissociated MgO and SiO with good dispersibility after modification 2 The harmless high-temperature modification treatment of the stone coal vanadium extraction smelting waste residue is completed;
step 2: ball milling the modified purified slag obtained in the step 1 until the mesh size of the purified slag is-200 and the proportion is more than 95%; the modified slag after ball milling is used as a raw material for removing lead-containing waste liquid. Adding 0.20g of ball-milled modified slag into 100ml of wastewater containing 120mg/L of lead, oscillating for 2 hours when the wastewater is heated to 30 ℃ in a water bath, and after the reaction is finished, carrying out solid-liquid separation to detect the lead concentration in the solution. The lead removal effect is shown in the following table:
as shown in the table above, the modified purification slag has good treatment effect on lead-containing wastewater, and when 0.20g of the modified purification slag is treated for 2 hours, the lead removal rate reaches 99.99 percent, which is lower than the standard of 0.5mg/L discharged by lead smelting enterprises.
As is clear from FIG. 2, the modified purification slag has a regular rod-like staggered laminated structure, the length of the fiber rods is more than 7.01-9.48 μm, and a sufficient gap is formed between the staggered laminated structure. As is clear from the above examples, after the lead removal reaction was completed, the concentration of lead in the solution was reduced to 0.01mg/L or less, and the lead removal rate was 99% or more.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention, i.e., the invention is not limited to the details shown and described.
Claims (4)
1. A method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste slag is characterized by comprising the following steps: the method comprises the following steps:
step 1: purifying slag produced in the process of extracting vanadium from stone coal and removing heterocyclic ring is used as a raw material, the purifying slag is subjected to high-temperature modification roasting, and the high-viscosity silicate and vanadate purifying slag is converted into dissociated MgO and SiO with good dispersibility after modification 2 The harmless high-temperature modification treatment of the stone coal vanadium extraction smelting waste residue is completed;
step 2: ball milling the modified purified slag obtained in the step 1 until the mesh size of the purified slag is-200 and the proportion is more than 95%; and (3) taking the ball-milled modified slag as a raw material for treating the lead-containing wastewater, adding 0.15-0.20 g of the ball-milled modified slag into each 100ml of the lead-containing wastewater, oscillating for 2 hours when the ball-milled modified slag is heated to 30-40 ℃ in a water bath, and carrying out solid-liquid separation after the reaction is finished to obtain the waste liquid and the lead-containing slag which meet the standard discharge value.
2. The method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste slag, which is characterized in that: the purification slag in the step 1 is derived from purification slag produced by removing heterocyclic joints in the stone coal vanadium extraction smelting process, and the main components of the purification slag are silicate and vanadate compounds, wherein the V content is 2.5-4.5%, the Si content is 5.5-6.2%, the P content is 14.01-15.87%, and the Mg content is 16.00-18.50%.
3. The method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste slag, which is characterized in that: in the step 2, the lead-containing wastewater is derived from lead smelting wastewater, the lead content of the lead-containing wastewater is 100-120 mg/L, and the pH value of the lead-containing wastewater is 4.5-5.5.
4. The method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste slag, which is characterized in that: in the step 1, the modification roasting temperature is controlled between 880 and 920 ℃, and the modification time is controlled at 24 hours.
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