CN101475240B - Method for removing lead-containing industrial wastewater by using ferroalloy plant silica fume - Google Patents
Method for removing lead-containing industrial wastewater by using ferroalloy plant silica fume Download PDFInfo
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- CN101475240B CN101475240B CN2009101108760A CN200910110876A CN101475240B CN 101475240 B CN101475240 B CN 101475240B CN 2009101108760 A CN2009101108760 A CN 2009101108760A CN 200910110876 A CN200910110876 A CN 200910110876A CN 101475240 B CN101475240 B CN 101475240B
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- lead
- industrial wastewater
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- porous ceramics
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Abstract
The invention provides a method for removing lead-bearing industrial wastewater by utilizing silica fume dust of ferroalloy works. The method comprises the steps of preparing the silica fume dust of ferroalloy works to be porous ceramics and placing the porous ceramics in wastewater for a period of time. The method has the advantages that the method is readily available in raw material, simple in preparation, low in cost, can be separated from a reaction system, recovered and used repeatedly, is convenient to use and high in lead removing efficiency, utilizes waste as the raw material, and has remarkable environmental protection benefit and economic benefit. And a product of the method has strong market competitiveness and high practical value.
Description
Technical field
The invention belongs to ecological environment material nd, with useless pollution treatment, promptly the comprehensive utilization of solid waste and technical field of waste water processing refer to a kind of method of utilizing ferroalloy plant silica fume to remove lead-containing industrial wastewater especially.
Background technology
Lead is the very wide a kind of element of distributed in nature, also is one of normal element that uses in the industry.Plumbous source is mainly in the industrial production of lead such as mining, smelting, rubber production, lead storage battery manufacturing, dyestuff, printing, pottery, lead glass, scolding tin, cable and lead pipe.These industrial production all can produce a large amount of lead waste water, and wherein battery industry is the main source of lead waste water.Lead and solubility lead salt thereof all have bigger toxicity to human body.When surpassing 0.1mg/L, the lead concentration in the water all can produce harm to human body, fishery and agricultural irrigation.When the plumbous amount of picked-up every day surpasses 0.3～1.0mg, just can in human body, accumulate, cause anaemia, neuritis, cancer etc.What be different from many other chemical is that lead can't be degraded in environment, still keeps its characteristic in case enter environment for a long time.Up to the present, both at home and abroad to the improvement of lead chemical precipitation method commonly used, liquid-film method, ion exchange method, absorption method, evaporation concentration method and electrolytic process etc.But these method ubiquities secondary pollution, cost height, the lower concentration lead waste water are handled and problem such as the polluted waters repairing effect is undesirable.
Fine silicon powder be iron alloy when smelting duriron and industrial silicon (Pure Silicon Metal), produce the very strong SiO of a large amount of volatility in the ore-smelting furnace
2With Si gas, form with the rapid oxidation condensation precipitation of air behind the gaseous emission.The content of its silicon-dioxide is very high, generally can reach more than 85%, has certain gelling under the normal temperature, and its adsorptive power is higher, dielectric properties are excellent, thermal expansivity is low.Fine silicon powder is mainly used in industries such as building, refractory materials, chemical industry at present.Up to now, not meeting the research that utilizes fine silicon powder to carry out the waste water deleading aspect as yet reports.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing ferroalloy plant silica fume to remove lead-containing industrial wastewater; this method raw material is easy to get; preparation is simple; cost is low, can separate from reaction system, reclaims and reuse, and is easy to use; deleading efficient height; raw material itself has significant environmental protection benefit and economic benefit with regard to utilization of waste material, and product has the very strong market competitiveness and practical value.
The method of utilizing ferroalloy plant silica fume to remove lead-containing industrial wastewater of the present invention, it is characterized in that: adopt ferroalloy plant silica fume to be prepared into porous ceramics, to place lead-containing industrial wastewater for some time in the described porous ceramics, remove the lead ion in the lead-containing industrial wastewater.
Superiority of the present invention is: the present invention utilizes returned to the use of ferroalloy plant silica fume preparation to receive delead materials, and fine silicon powder has high characterization of adsorption and deleading efficient; After the present invention made the porous ceramics matter waste water deleading material of different shape with fine silicon powder, the intensity height was not dissolved in water, and recyclable repeated use has solved the technical barrier of reclaiming aspect; The waste water deleading material of patent of the present invention, the void content height, intensity is suitable, can not dissolve in water, stability is fine.Lead ion in the waste water can be attracted in the porous ceramic film material and be fixed up, and reaches the purpose of waste water deleading; And the raw material that the present invention adopts is ferroalloy plant silica fume, turns waste into wealth, and reaches the resource recycling, and raw materials cost and cheap has reduced the pollution of environment, and is simple for production, easy to use, has significant environmental protection benefit and economic benefit.
Embodiment
Fine silicon powder can be selected ferroalloy plant silica fume for use, the about 0.1 μ m of median size, SiO
2The amorphous silica of content＞90%.
Utilize fine silicon powder to prepare porous ceramics:
A. fine silicon powder is placed kiln, 500 ℃ of pre-burnings and be incubated 1 hour, ball milling is crossed 200 mesh sieves;
B. in fine silicon powder, add the additive account for powder quality 2～10%, make diameter and be granular, the hollow tubular of 3-100mm or the base substrate of other shape; Described additive is a kind of in water glass, phosphoric acid or the polyvinyl alcohol;
C. molding blank is dried;
D. oven dry back base substrate places in the kiln, at 700-900 ℃ of sintering and be incubated 1 hour and burn till, naturally cools to room temperature, promptly makes the porous ceramics of wollastonite powder matter.
To place in the above-mentioned porous ceramics lead-containing industrial wastewater 24-72 hour, almost can remove the lead ion in the lead-containing industrial wastewater fully.
Can adopt PEAA800 type atomic absorption spectrophotometer, measure the plumbum ion concentration in the lead-containing industrial wastewater.
Below be several specific embodiment of the present invention, further specify the present invention, but the present invention be not limited only to this.
Embodiment 1
Utilize ferroalloy plant silica fume to remove the method for lead-containing industrial wastewater, its raw material is as follows: fine silicon powder.
Preparation process:
A. fine silicon powder is placed 500 ℃ of pre-burnings of kiln and be incubated 1 hour, ball milling is crossed 200 mesh sieves;
B. in fine silicon powder, add the granular sample that the water glass that accounts for powder quality 8% is made diameter 5mm;
C. the moulding sample is 80 ℃ of oven dry down;
D. oven dry back sample places the interior 700 ℃ of sintering of kiln and is incubated 1 hour and burns till, and naturally cools to room temperature and makes waste water deleading material.
Waste water deleading: injecting 60ml initial lead ionic concn in beaker is the simulated wastewater (Pb (NO of 100mg/L
3)
2The aqueous solution), add the 1g delead materials, delead materials is contacted with simulated wastewater solution,, use atomic absorption spectrophotometer plumbum ion concentration situation over time in the time-sampling of each setting.Contact the back plumbum ion concentration reduces rapidly with waste water, after 24 hours in the waste water solution plumbum ion concentration reduce to 24.92mg/L, plumbum ion concentration had dropped to 0.30mg/L after deleading efficient can reach 75.08%, 72 hour, deleading efficient reaches discharging standards up to 99.70%.
Embodiment 2
Utilize ferroalloy plant silica fume to remove the method for lead-containing industrial wastewater, its raw material is as follows: fine silicon powder.
Preparation process:
A. fine silicon powder is placed 500 ℃ of pre-burning insulations of kiln 1 hour, ball milling is crossed 200 mesh sieves;
B. in fine silicon powder, add the phosphoric acid that accounts for powder quality 4%, make external diameter 12mm, internal diameter 6mm, the circular sample of long 12mm;
C. the moulding sample is 80 ℃ of oven dry down;
D. oven dry back sample places the interior 900 ℃ of sintering of kiln and is incubated 1 hour and burns till, and naturally cools to room temperature, makes waste water deleading material.
Waste water deleading: injecting 60ml initial lead ionic concn in individual beaker is the simulated wastewater (Pb (NO of 60mg/L
3)
2The aqueous solution), add the 1g delead materials, delead materials is contacted with simulated wastewater solution, use atomic absorption spectrophotometer plumbum ion concentration situation over time.Contact the back plumbum ion concentration reduces rapidly with waste water, after 24 hours in the waste water solution plumbum ion concentration be 11.93mg/L, the deleading efficient of sample can reach 80.11%, after 60 hours in the waste water solution plumbum ion concentration reduce to 0.80mg/L, the deleading efficient of sample can reach 98.70%, reaches discharging standards.
Embodiment 3 (recycling use)
A. fine silicon powder is placed 500 ℃ of pre-burning insulations of kiln 1 hour, ball milling is crossed 200 mesh sieves;
B. in fine silicon powder, add the polyvinyl alcohol that accounts for powder quality 6% and make external diameter 10mm, internal diameter 5mm, the circular sample of long 10mm;
C. the moulding sample is 80 ℃ of oven dry down;
D. oven dry back sample places the interior 700 ℃ of sintering of kiln and is incubated 1 hour and burns till, and is incubated after 1 hour, naturally cools to room temperature and makes waste water deleading material.
Waste water deleading: injecting 60ml initial lead ionic concn in beaker is the simulated wastewater (Pb (NO of 20mg/L
3)
2The aqueous solution), add the 1g delead materials, after making delead materials and simulated wastewater solution contacting 24 hours, take out ring specimen, use the atomic absorption spectrophotometer plumbum ion concentration, the deleading efficient of calculation sample.Then, under above-mentioned same experimental conditions, measure the deleading efficient of calculation sample once more, we use same sample to carry out 20 recycling uses experiment altogether.The deleading efficient that reclaims circulation experiment for the 20th time is 97.50%, experimental result shows, recycle respond wellly with the reclaiming of the porous ceramics matter waste water deleading material of fine silicon powder system, can repeat recycling use, when the absorption of lead reaches capacity till.
Claims (4)
1. method of utilizing ferroalloy plant silica fume to handle lead-containing industrial wastewater, it is characterized in that: adopt ferroalloy plant silica fume to be prepared into porous ceramics, described porous ceramics is placed lead-containing industrial wastewater for some time, remove the lead ion in the lead-containing industrial wastewater; The preparation process of described porous ceramics is:
A. fine silicon powder is placed kiln, 500 ℃ of pre-burnings and be incubated 1 hour, ball milling is crossed 200 mesh sieves;
B. in fine silicon powder, add the additive account for powder quality 2～10%, make diameter and be granular, the hollow tubular of 3-100mm or the base substrate of other shape; Described additive is a kind of in water glass, phosphoric acid or the polyvinyl alcohol;
C. molding blank is dried;
D. the base substrate after will drying places in the kiln, at 700-900 ℃ of sintering and be incubated 1 hour and burn till, naturally cools to room temperature, promptly makes the porous ceramics of wollastonite powder matter.
2. the method for utilizing ferroalloy plant silica fume to handle lead-containing industrial wastewater according to claim 1, it is characterized in that: described fine silicon powder is selected ferroalloy plant silica fume for use, median size 0.1 μ m, SiO
2The amorphous silica of content＞90%.
3. the method for utilizing ferroalloy plant silica fume to handle lead-containing industrial wastewater according to claim 1 is characterized in that: adopt PEAA800 type atomic absorption spectrophotometer, measure the plumbum ion concentration in the lead-containing industrial wastewater.
4. the method for utilizing ferroalloy plant silica fume to handle lead-containing industrial wastewater according to claim 1 is characterized in that: described porous ceramics was placed lead-containing industrial wastewater 24-72 hour.
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| CN2009101108760A CN101475240B (en) | 2009-01-16 | 2009-01-16 | Method for removing lead-containing industrial wastewater by using ferroalloy plant silica fume |
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| CN2009101108760A CN101475240B (en) | 2009-01-16 | 2009-01-16 | Method for removing lead-containing industrial wastewater by using ferroalloy plant silica fume |
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| CN101475240A CN101475240A (en) | 2009-07-08 |
| CN101475240B true CN101475240B (en) | 2011-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101670265B (en) * | 2009-10-29 | 2011-07-27 | 福州大学 | Recyclable wastewater delead materials prepared by desulfurized ash slag and preparation method |
| CN116116881B (en) * | 2023-01-29 | 2024-02-23 | 西部矿业股份有限公司 | Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues |
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