CN101708399B - Preparation method of porous slag filter material - Google Patents
Preparation method of porous slag filter material Download PDFInfo
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- CN101708399B CN101708399B CN2009102300508A CN200910230050A CN101708399B CN 101708399 B CN101708399 B CN 101708399B CN 2009102300508 A CN2009102300508 A CN 2009102300508A CN 200910230050 A CN200910230050 A CN 200910230050A CN 101708399 B CN101708399 B CN 101708399B
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- slag
- clay
- raw material
- filter material
- porous
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Processing Of Solid Wastes (AREA)
Abstract
A porous slag filter material contains 30 to 80 wt. % of slag, 15 to 50 wt. % of clay and 5 to 20 wt. % of pore-forming agent. The filter material is prepared by proportionally mixing slag, clay and pore-forming agent which are treated with ball mill and dried, watering to form raw material balls, drying, keeping warm at a specific temperature for a period, taking out after baking for a period at a set temperature, and cooling to room temperature in order to obtain the finished product. The porous slag filter material of the invention has porous rough surface which is beneficial for apposition growth of microbial in biofilter, has excellent absorbability and has excellent effect of processing sewage used as filler in aerating biofilter. The porous slag filter material and the preparation method thereof provided by the invention take full advantage of industrial waste slag, turn waste into wealth and decrease environmental pollution and space occupation in order to achieve economic benefit and environmental benefit.
Description
Technical field
The present invention relates to a kind of biofilter filtrate, especially a kind of porous slag filter material and preparation method thereof.
Background technology
When slag is iron and steel smelting, by the byproduct that slag formers such as iron ore, coke, steel scrap and lime stone are discharged by pyroreaction, be to produce the maximum a kind of waste residue of quantity in the metallurgy industry, quantity is about 15%～20% of output of steel.A large amount of soils has been occupied in the stacking of waste residue, severe contamination underground water, surface water, influence environment, harm people ' s health.The processing and utilizing of these trade wastes is the problems that must solve as early as possible.China's slag has nearly 70% to obtain than good utilisation at present, but also has millions of tons every year because of not being utilized leave unused occupation of land, contaminated environment.Therefore, opening up a new steel slag resourceization utilizes approach to seem particularly important.After slag was handled through suitable heat treatment, cooling curing, processing, its chemical analysis, physical property etc. were all similar to natural resources, are valuable secondary resources, can be applicable to many fields, have so promptly saved a large amount of precious resources, have protected environment again.
Main chemical compositions, macroscopic property to slag are analyzed, and the result shows that main chemical compositions and the one of clay raw materials in the slag is more approaching, and this is for being that primary raw material prepares filtrate strong foundation is provided with the slag.
At present, the biofilter filtrate that is used for water treatment mainly is a ceramic grain filter, and ceramic grain filter is applied to have in the BAF that resistance to water-flow is big, porosity is little, obstruction easily, intensity difference, easy broken, not water-fast defective such as wash away, water treatment weak effect.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of porous slag filter material and preparation method thereof.
A kind of porous slag filter material according to weight percent meter, comprises slag 30-80%, clay 15-50%, pore former 5-20%.
Described pore former is gangue, starch, saw dust or calcium carbonate (CaCO
3) in a kind of.
The preparation method of above-mentioned porous slag filter material comprises the steps:
(1) get an amount of slag and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Equally, get an amount of clay and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves;
(2) slag after will sieving and clay are put into 105 ℃ in baking oven dry 24h down once more, and be standby;
(3) slag behind ball milling, clay and an amount of pore former stir, and spread the water moulding and get raw material ball;
(4) raw material ball is put into 105 ℃ in baking oven and carried out the drying processing;
(5) raw material ball that drying got well takes out, and puts into chamber type electric resistance furnace, be warming up to 400-700 ℃ after, insulation 10-40min carries out The pre-heat treatment;
(6) preheating is the good quick immigration of raw material ball has risen in the program control type electric furnace of predetermined temperature, takes out behind 1000-1300 ℃ of following roasting 10-40min, is cooled to room temperature and promptly obtains required finished product;
According to weight percent meter, slag 30-80%, clay 15-50%, pore former 5-20%.
Described pore former is gangue, starch, saw dust or calcium carbonate (CaCO
3) in a kind of.
By the porous slag filter material of above-mentioned preparation method's preparation, getting the solid waste slag is raw material, and moulding process is simple, and production cost is low.Owing to contain pore former soluble in water in the slag filter material, with can make filtrate become porous state after waste water contacts, thereby pollutants in waste water matter had preferably adsorb, the removal effect.And, smelt the discarded object slag that produces in the pig iron process, its stacking not only needs fund and large tracts of land stockyard, and contaminated environment.Utilize slag to make aerating biological filter pool filler, can turn waste into wealth, problems such as the pollution of minimizing environment, appropriation of land.
The specific embodiment
Embodiment one:
Get the slag of 30kg and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Get the clay of 50kg and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves.The slag and the clay that sieve are put into 105 ℃ of following dry 24h of baking oven once more, standby.The gangue of slag behind ball milling, clay and 20kg stirs, and spreads the water moulding and gets raw material ball; Raw material ball put into carry out drying under 105 ℃ in the baking oven and handle; The raw material ball that drying is good takes out, and puts into chamber type electric resistance furnace, is warming up to 400 ℃, insulation 10min.The quick immigration of the raw material ball that preheating is good has risen in the program control type electric furnace of predetermined temperature, takes out behind 1000 ℃ of following roasting 40min, is cooled to room temperature and promptly obtains required finished product.
Embodiment two:
Get the slag of 45kg and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Get the clay of 40kg and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves.The slag and the clay that sieve are put into 105 ℃ of following dry 24h of baking oven once more, standby.The starch of slag behind ball milling, clay and 15kg stirs, and spreads the water moulding and gets raw material ball; Raw material ball put into carry out drying under 105 ℃ in the baking oven and handle; The raw material ball that drying has been got well takes out, and puts into chamber type electric resistance furnace, be warming up to 500 ℃ after, insulation 20min.The quick immigration of the raw material ball that preheating is good has risen in the program control type electric furnace of predetermined temperature, takes out behind 1100 ℃ of following roasting 30min, is cooled to room temperature and promptly obtains required finished product.
Embodiment three:
Get the slag of 60kg and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Get the clay of 30kg and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves.The slag and the clay that sieve are put into 105 ℃ of following dry 24h of baking oven once more, standby.The saw dust of slag behind ball milling, clay and 10kg stirs, and spreads the water moulding and gets raw material ball; Raw material ball put into carry out drying under 105 ℃ in the baking oven and handle; The raw material ball that drying has been got well takes out, and puts into chamber type electric resistance furnace, be warming up to 600 ℃ after, insulation 30min.The quick immigration of the raw material ball that preheating is good has risen in the program control type electric furnace of predetermined temperature, takes out behind 1200 ℃ of following roasting 20min, is cooled to room temperature and promptly obtains required finished product.
Embodiment four:
Get the slag of 80kg and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Get the clay of 15kg and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves.The slag and the clay that sieve are put into 105 ℃ of following dry 24h of baking oven once more, standby.Calcium carbonate (the CaCO of slag behind ball milling, clay and 5kg
3) stir, spread the water moulding and get raw material ball; Raw material ball put into carry out drying under 105 ℃ in the baking oven and handle; The raw material ball that drying has been got well takes out, and puts into chamber type electric resistance furnace, be warming up to 700 ℃ after, insulation 40min.The quick immigration of the raw material ball that preheating is good has risen in the program control type electric furnace of predetermined temperature, takes out behind 1300 ℃ of following roasting 10min, is cooled to room temperature and promptly obtains required finished product.
Claims (2)
1. the preparation method of a porous slag filter material is characterized in that, comprises the steps:
(1) get an amount of slag and put into 105 ℃ of dry 24h of baking oven, ball milling is crossed 100 mesh sieves, takes out standby; Equally, get an amount of clay and put into 105 ℃ of oven dry of baking oven 24h, ball milling is crossed 100 mesh sieves;
(2) slag after will sieving and clay are put into 105 ℃ in baking oven dry 24h down once more, and be standby;
(3) slag behind ball milling, clay and an amount of pore former stir, and spread the water moulding and get raw material ball;
(4) raw material ball is put into 105 ℃ in baking oven and carried out the drying processing;
(5) raw material ball that drying got well takes out, and puts into chamber type electric resistance furnace, be warming up to 400-700 ℃ after, insulation 10-40min carries out The pre-heat treatment;
(6) preheating is the good quick immigration of raw material ball has risen in the program control type electric furnace of predetermined temperature, takes out behind 1000-1300 ℃ of following roasting 10-40min, is cooled to room temperature and promptly obtains required finished product;
According to weight percent meter, slag 30-80%, clay 15-50%, pore former 5-20%.
2. the preparation method of porous slag filter material as claimed in claim 1 is characterized in that, pore former is gangue, starch, saw dust or calcium carbonate (CaCO
3) in a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102300508A CN101708399B (en) | 2009-11-11 | 2009-11-11 | Preparation method of porous slag filter material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102300508A CN101708399B (en) | 2009-11-11 | 2009-11-11 | Preparation method of porous slag filter material |
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| Publication Number | Publication Date |
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| CN101708399A CN101708399A (en) | 2010-05-19 |
| CN101708399B true CN101708399B (en) | 2011-04-27 |
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| CN2009102300508A Expired - Fee Related CN101708399B (en) | 2009-11-11 | 2009-11-11 | Preparation method of porous slag filter material |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913584B (en) * | 2010-08-27 | 2012-04-04 | 江苏永冠给排水设备有限公司 | Method for producing filter material for removing fluorine from drinking water |
| CN102125786B (en) * | 2011-02-24 | 2012-08-29 | 南昌大学 | Method for preparing porous ceramsite filter material by using lepidolite extracted lithium slag |
| CN103028366B (en) * | 2012-12-20 | 2014-10-08 | 江苏省交通科学研究院股份有限公司 | Method for preparing composite absorbing filter material |
| CN104828928B (en) * | 2014-02-12 | 2016-08-24 | 同济大学 | A kind of preparation method of nitrogen and phosphorus removal bio filter |
| CN104129885B (en) * | 2014-07-03 | 2016-03-02 | 济南大学 | A kind of to upper reaches electricity biological coupling water cleaning systems and process for purifying water |
| CN104163615B (en) * | 2014-07-18 | 2016-02-03 | 西安建筑科技大学 | A kind of slag-based mesoporous material and preparation method thereof |
| CN107803063B (en) * | 2017-11-01 | 2020-01-14 | 武汉钢铁有限公司 | Steel slag filter material for sponge city construction and preparation method thereof |
| CN108083427B (en) * | 2017-12-26 | 2020-12-25 | 安徽华骐环保科技股份有限公司 | Novel biological filter material and preparation method thereof |
| CN108554379B (en) * | 2018-05-16 | 2020-12-08 | 辽宁大学 | Adsorbent based on waste steel slag and preparation method and application thereof |
| CN110204053A (en) * | 2019-06-13 | 2019-09-06 | 南京信息工程大学 | A kind of efficient dephosphorization Wetland Substrate of wetland engineering and preparation method thereof |
| CN110790362B (en) * | 2019-11-14 | 2023-10-20 | 济南大学 | Method for simultaneously removing antibiotics and heavy metals in livestock and poultry breeding wastewater |
| CN111018094B (en) * | 2019-12-26 | 2022-04-01 | 南京公诚节能新材料研究院有限公司 | Preparation method of light biological filter material |
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