CN105039615A - Processing method for stockpiled AOD stainless steel slag - Google Patents
Processing method for stockpiled AOD stainless steel slag Download PDFInfo
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- CN105039615A CN105039615A CN201510565136.1A CN201510565136A CN105039615A CN 105039615 A CN105039615 A CN 105039615A CN 201510565136 A CN201510565136 A CN 201510565136A CN 105039615 A CN105039615 A CN 105039615A
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- slag
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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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a processing method for stockpiled AOD stainless steel slag. According to the processing method, the stockpiled AOD stainless steel slag and LF refining slag are mixed; the final refining slag is formed through refining under the reducing atmosphere; and after the final refining slag is post-processed, the processed refining slag can be obtained. According to the processing method for the stockpiled AOD stainless steel slag, the high temperature and the reducing atmosphere for LF refining are sufficiently utilized so that Cr6+ in the stockpiled AOD stainless steel slag can be reduced to be Cr3+. According to the method, due to the fact that the characteristic that generation of spinel is facilitated through the high content of Al2O3 in the LF refining slag is fully used and the Cr6+ in the stockpiled AOD stainless steel slag is promoted to be reduced to be Cr3+ through the high temperature and the reducing atmosphere for LF refining, a small amount of Cr2O3 entering the refining slag enters the spinel to be solidified and sealed; and the leaching concentration of the Cr6+ of the processed refining slag is several micrograms per liter and is far lower than the standard limit value in Identification for Leaching Toxicity of Identification Standards for Hazardous Wastes (GB5085.3-2007), and therefore harmless processing of the stockpiled AOD stainless steel slag is achieved. The processing method is simple in technology and easy and convenient to operate, and the harmless processing cost is further reduced.
Description
Technical field
The present invention relates to a kind for the treatment of process of slag, especially a kind for the treatment of process of storing up AOD stainless steel slag.
Background technology
2014, Chinese stainless steel crude steel output was 2169.2 ten thousand tons, increases by 14.27% on a year-on-year basis.Produce 1 ton containing chromium refuse (mainly comprising stainless steel slag, acid-washing stainless steel mud etc.) by every 3 tons of stainless steels, exceed 7,000,000 tons containing chromium refuse year generation.At present, stainless steel main production equipments is electric furnace (ElectricArcFurnace, EAF) and argon oxygen decarburizing furnace (ArgonOxygenDecarburization, AOD), and therefore stainless steel slag mainly comprises EAF slag and AOD slag.Stainless steel slag principal element is Ca, Si, Mg, Al, Fe etc., but due to the heavy metal content such as Cr in stainless steel slag higher, its recycling must consider its pulverability, stability and leaching.Pulverability is mainly by oblique crystal β-C
2s is to octahedra γ-C
2s without about there being the volumetric expansion of 12% to cause in hot phase transition process; Stability by f-CaO and f-MgO hydrolytic process 97.8% and 148% volumetric expansion cause; Leaching refers to that stainless steel slag is stacked or tailings is used as after material of construction under the leaching liquor effects such as rainwater, and the toxic heavy metals such as Cr enter the ability of water body.Due to heavy metal leachings such as chromium, the comprehensive Utilization Ways of stainless steel slag is restricted, and on a small quantity for steel slag cement and material of construction preparation, and more stainless steel slags can only to store up process.
Because the melting later stage is reducing atmosphere, hypoxemia gesture controls the oxidation of metal and metalloid, therefore the Cr in AOD stainless steel slag mainly exists with metallic state and+3 valency forms, metallic state chromium usually and Ni, Fe form alloy, reclaimed by fine grinding and magnetic separation, and trivalent chromium is mainly present in Ca-Mg-Al silicate and spinels mineral.A lot of scholar thinks, not only the Cr in stainless steel slag when high temperature
3+cr can be oxidized to
6+, under normal temperature state, this reaction also possesses thermodynamical reaction condition; Especially, after material absorbs moisture, CaO hydrolysis will generate the more Ca in oxygen center (OH)
2, make the Cr that oxytropism is stronger
3+more easily be oxidized to Cr
6+, thus increase the leaching toxicity of chromium in AOD stainless steel slag.Due to the impact by kinetic factor, AOD stainless steel slag stores up Cr after 1 year
3+oxidation ratio about 10%, greatly strengthen the leaching toxicity of AOD stainless steel slag.Therefore, rationally disposal is stored up for some time and is contained a certain amount of Cr
6+aOD stainless steel slag, namely storing up AOD stainless steel slag, is disposal of waste gas, water and industrial residue field worker's issues that need special attention.At present, the harmless treatment of AOD stainless steel slag mainly contains three classes:
(1) high temperature reduction method: pyrocarbon reduction is with coke, powdered carbon, wood chip, coal gangue and eutrophication algae slag etc. as reductive agent, and the excessive C that utilization wherein contains and stainless steel slag carry out high-temperature fusion reaction, by Cr in slag
6+be reduced to Cr
3+, finally exist with vitreous state or spinel, can be used as Product recycling and use.Except solid state reduction agent, the gases such as hydrogen, methane, carbon monoxide also can be adopted as reductive agent to Cr
3+reduce.It is not thorough often to there is reduction in solid phase high temperature reduction, and it is inflammable gas that gas phase high temperature reduction exists again reductive agent, technique relative complex, otherwise easily causes new pollution.
(2) wet reducing method: stainless steel slag mixes with acid or basic solution, and adds in solution containing the reducing substances such as ferrous sulfate, alkali metalsulphide, by Cr
6+be reduced to Cr
3+, and in basic solution Precipitation Cr (OH)
3with recycling use.Different according to reaction conditions, acidic reduction method, alkaline reduction method and organophosphorus waste liquid reduction method can be divided into.These methods need consumption acids alkaline solution, and produce new sewage need process.
(3) cement solidification method: by a certain amount of stainless steel ground-slag with addition of a certain amount of FeSO
4, FeCl
2deng adding cement clinker after additive, the mixing that adds water, stirring, shaping and solidify, along with aquation and the setting and harden process of cement, Cr is sealed in not stripping in hardening of cement body, reaches stable and innoxious object.Its shortcoming to be after cement solidification, due to the volumetric expansion of chromium slag, to cause cement and concrete stability.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of innoxious treatment process of storing up AOD stainless steel slag.
For solving the problems of the technologies described above, the technical solution used in the present invention is: it will be stored up AOD stainless steel slag and mix with LF refining slag, and under reducing atmosphere, refining forms refining finishing slag, and refining finishing slag, through aftertreatment, can obtain the refining slag after processing.
The consumption of the AOD of storing up stainless steel slag of the present invention is LF refining slag and stores up 5% ~ 20% of AOD stainless steel slag gross weight.
Refining temperature of the present invention is 1500 DEG C ~ 1600 DEG C, and the time is 25 ~ 50min.
Mix with LF refining slag after the AOD of storing up stainless steel slag drying of the present invention, magnetic separation.Describedly store up AOD stainless steel slag dry 3 ~ 6h at 100 ~ 120 DEG C.
The beneficial effect adopting technique scheme to produce is: (1) the present invention takes full advantage of high temperature and the reducing atmosphere of LF refining, makes Cr in the AOD stainless steel slag stored up
6+be reduced to Cr
3+.
(2) the present invention makes full use of LF refining slag height Al
2o
3content is conducive to the feature that spinel generates, and is impelled store up Cr in AOD stainless steel slag by LF refining high-temperature reductibility atmosphere
6+be reduced to Cr
3+, make a small amount of Cr entering refining slag
2o
3enter spinel be cured and seal up for safekeeping, the refining slag Cr after process
6+a few microgram liter of leaching concentration, far below the standard limited value in country " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007), achieves the harmless treatment of storing up AOD stainless steel slag.
(3) present invention process is simple, easy and simple to handle, further saves harmless treatment cost.
Embodiment
The treatment process of originally storing up AOD stainless steel slag adopts following processing step: will store up AOD stainless steel slag and be placed in loft drier be cooled to normal temperature after dry 3 ~ 6h at 100 ~ 120 DEG C, magnetic separation adopts papery or plastics bag to pack after extracting magnetic substance, is transported to refining plant stand-by.According to store up AOD stainless steel slag consumption be LF refining slag and store up AOD stainless steel slag gross weight 5% ~ 20% proportioning, packed AOD stainless steel slag is mixed into LF refining slag and mixes slag.Described mixing slag adds LF refining furnace, under reducing atmosphere, carry out refining, and refining temperature is 1500 DEG C ~ 1600 DEG C, refining time is 25 ~ 50min, in refining process, mixing slag high temperature fully melts, reduce after, formation refining finishing slag.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the treatment process of conventional slag to carry out aftertreatment, obtains the refining slag after processing.
In treatment method: store up AOD stainless steel slag described in (1) and derive from AOD explained hereafter stainless iron and steel enterprise stockyard, its main chemical compositions and content as shown in table 1.
Table 1: main chemical compositions and the content (% by weight) of storing up AOD stainless steel slag
(2) main chemical compositions of described LF refining slag is as shown in table 2.
The main chemical compositions of table 2:LF refining slag and content (% by weight)
(3), in refining process, strong reductant Al adds the Cr that can make to store up process oxidation generation
6+be reduced to Cr
3+, even partial reduction becomes chromium metal and enters molten steel.In refining process, the reduction reaction process of chromium is shown in formula (1) and formula (2):
2Al+2CrO
3→Cr
2O
3+Al
2O
3（1）
2Al+Cr
2O
3→2Cr+Al
2O
3（2）。
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
Embodiment 1: gather and store up the AOD stainless steel slag of more than a year, this stores up the main chemical compositions of AOD stainless steel slag and content is: CaO40%, MgO8%, SiO
220%, Al
2o
33%, FeO1%, MnO0.5%, Cr
2o
30.5%, above-mentioned content is weight content.The above-mentioned AOD of storing up stainless steel slag is placed in loft drier and is cooled to normal temperature after dry 6h at 105 DEG C, and the tailings after magnetic substance is extracted in magnetic separation adopts papery or plastics bag to pack, and is transported to refining plant stand-by.According to LF refining slag: the mass ratio mixing of storing up AOD stainless steel slag=95:5, adds LF refining furnace by mixing slag, under reducing atmosphere through 1500 DEG C, form refining finishing slag after 50min refining.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the method consistent with conventional steel Slag treatment to carry out aftertreatment, obtains the refining slag after processing.Cr in refining slag after adopting GB5085.3-2007 to measure process
6+leaching concentration, result shows: Cr
6+leaching concentration < 5 μ g/L, lower than minimum detectable concentration.
Embodiment 2: gather and store up the AOD stainless steel slag of more than a year, this stores up the main component of AOD stainless steel slag and content is: CaO50%, MgO10%, SiO
230%, Al
2o
35%, FeO2%, MnO1%, Cr
2o
31%, above-mentioned content is weight content.The above-mentioned AOD of storing up stainless steel slag is placed in loft drier and is cooled to normal temperature after dry 5h at 105 DEG C, and the tailings after magnetic substance is extracted in magnetic separation adopts papery or plastics bag to pack, and is transported to refining plant stand-by.According to LF refining slag: the mass ratio mixing of storing up AOD stainless steel slag=90:10, adds LF refining furnace by mixing slag, under reducing atmosphere through 1540 DEG C, form refining finishing slag after 40min refining.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the method consistent with conventional steel Slag treatment to carry out aftertreatment, obtains the refining slag after processing.Cr in refining slag after adopting GB5085.3-2007 to measure process
6+leaching concentration, result shows: Cr
6+leaching concentration < 5 μ g/L, lower than minimum detectable concentration.
Embodiment 3: gather and store up the AOD stainless steel slag of more than a year, this stores up the main component of AOD stainless steel slag and content is: CaO45%, MgO89%, SiO
226%, Al
2o
34.5%, FeO1.7%, MnO0.92%, Cr
2o
30.88%, above-mentioned content is weight content.The above-mentioned AOD of storing up stainless steel slag is placed in loft drier and is cooled to normal temperature after dry 5.5h at 100 DEG C, tailings after magnetic substance is extracted in magnetic separation adopts papery or plastics bag to pack, be transported to refining plant stand-by, according to LF refining slag: the mass ratio mixing of storing up AOD stainless steel slag=90:10, mixing slag is added LF refining furnace, under reducing atmosphere through 1560 DEG C, form refining finishing slag after 35min refining.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the method consistent with conventional steel Slag treatment to carry out aftertreatment, obtains the refining slag after processing.Cr in refining slag after adopting GB5085.3-2007 to measure process
6+leaching concentration, result shows: Cr
6+leaching concentration < 5 μ g/L, lower than minimum detectable concentration.
Embodiment 4: gather and store up the AOD stainless steel slag of more than a year, this stores up the main component of AOD stainless steel slag and content is: CaO43%, MgO8.74%, SiO
226.2%, Al
2o
33.55%, FeO1.58%, MnO0.86%, Cr
2o
30.55%, above-mentioned content is weight content.The above-mentioned AOD of storing up stainless steel slag is placed in loft drier and is cooled to normal temperature after dry 3h at 110 DEG C, and the tailings after magnetic substance is extracted in magnetic separation adopts papery or plastics bag to pack, and is transported to refining plant stand-by.According to LF refining slag: the mass ratio mixing of storing up AOD stainless steel slag=85:15, adds LF refining furnace by mixing slag, under reducing atmosphere through 1600 DEG C, form refining finishing slag after 30min refining.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the method consistent with conventional steel Slag treatment to carry out aftertreatment, obtains the refining slag after processing.Cr in refining slag after adopting GB5085.3-2007 to measure process
6+leaching concentration, result shows: Cr
6+leaching concentration < 5 μ g/L, lower than minimum detectable concentration.
Embodiment 5: gather and store up the AOD stainless steel slag of more than a year, this stores up the main component of AOD stainless steel slag and content is: CaO47%, MgO9.2%, SiO
222%, Al
2o
34.3%, FeO1.95%, MnO0.66%, Cr
2o
30.79%, above-mentioned content is weight content.The above-mentioned AOD of storing up stainless steel slag is placed in loft drier and is cooled to normal temperature after dry 4h at 120 DEG C, and the tailings after magnetic substance is extracted in magnetic separation adopts papery or plastics bag to pack, and is transported to refining plant stand-by.According to LF refining slag: the mass ratio mixing of storing up AOD stainless steel slag=80:20, adds LF refining furnace by mixing slag, under reducing atmosphere through 1580 DEG C, form refining finishing slag after 25min refining.After LF refining completes, refining finishing slag is transported to Slag treatment workshop through slag ladle, adopts the method consistent with conventional steel Slag treatment to carry out aftertreatment, obtains the refining slag after processing.Cr in refining slag after adopting GB5085.3-2007 to measure process
6+leaching concentration, result shows: Cr
6+leaching concentration < 5 μ g/L, lower than minimum detectable concentration.
Claims (5)
1. store up a treatment process for AOD stainless steel slag, it is characterized in that: it will be stored up AOD stainless steel slag and mix with LF refining slag, under reducing atmosphere, refining forms refining finishing slag, and refining finishing slag, through aftertreatment, can obtain the refining slag after processing.
2. treatment process of storing up AOD stainless steel slag according to claim 1, is characterized in that: described in store up AOD stainless steel slag consumption be LF refining slag and store up 5% ~ 20% of AOD stainless steel slag gross weight.
3. treatment process of storing up AOD stainless steel slag according to claim 1, is characterized in that: described refining temperature is 1500 DEG C ~ 1600 DEG C, and the time is 25 ~ 50min.
4. the treatment process of storing up AOD stainless steel slag according to claim 1,2 or 3, is characterized in that: described in store up AOD stainless steel slag drying, magnetic separation after mix with LF refining slag.
5. treatment process of storing up AOD stainless steel slag according to claim 4, is characterized in that: described in store up AOD stainless steel slag dry 3 ~ 6h at 100 ~ 120 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418060A (en) * | 2016-01-07 | 2016-03-23 | 马鞍山市安工大工业技术研究院有限公司 | Method for preparing material with picotite through stainless steel slag |
| CN108467985A (en) * | 2018-04-12 | 2018-08-31 | 山西太钢不锈钢股份有限公司 | A kind of inclusion control method of pressure vessel austenitic stainless steel |
| CN114086052A (en) * | 2021-12-03 | 2022-02-25 | 宝钢德盛不锈钢有限公司 | Smelting method of low-density stainless steel |
| CN114959183A (en) * | 2022-04-28 | 2022-08-30 | 洛阳中重铸锻有限责任公司 | Refined slag system based on aluminum deoxidized Cr5 supporting roll steel and application process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002053351A (en) * | 2000-08-07 | 2002-02-19 | Sumitomo Metal Ind Ltd | Pollution-free stainless steel slag and method for manufacturing the same |
| CN101138670A (en) * | 2006-09-08 | 2008-03-12 | 隋智通 | Novel process of the high temperature reduction and detoxication of industrial chromic slag |
| CN101264481A (en) * | 2008-04-30 | 2008-09-17 | 钢铁研究总院 | Cr6+ furnace cinder containing gas reduction curing method |
| CN101318064A (en) * | 2007-06-07 | 2008-12-10 | 四川省安县银河建化集团有限公司 | Method for detoxicating chromic slag with reductive gas |
| CN101906500A (en) * | 2010-02-05 | 2010-12-08 | 甘肃锦世化工有限责任公司 | Method for directly producing chrome-base alloy steel by comprehensively using calcium-free chrome slag |
| CN102796879A (en) * | 2012-09-10 | 2012-11-28 | 湖北振华化学股份有限公司 | Method for preparing chromium-containing iron powder by direct reduction of calcium-free chromium slag |
| CN102864311A (en) * | 2012-09-21 | 2013-01-09 | 承德建龙特殊钢有限公司 | Recovery method of chromium in high chromium-content slag in steel making-LF (ladle furnace) working procedure |
| CN103509911A (en) * | 2013-09-30 | 2014-01-15 | 承德建龙特殊钢有限公司 | Method for directly alloying chrome-bearing steel |
-
2015
- 2015-09-08 CN CN201510565136.1A patent/CN105039615B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002053351A (en) * | 2000-08-07 | 2002-02-19 | Sumitomo Metal Ind Ltd | Pollution-free stainless steel slag and method for manufacturing the same |
| CN101138670A (en) * | 2006-09-08 | 2008-03-12 | 隋智通 | Novel process of the high temperature reduction and detoxication of industrial chromic slag |
| CN101318064A (en) * | 2007-06-07 | 2008-12-10 | 四川省安县银河建化集团有限公司 | Method for detoxicating chromic slag with reductive gas |
| CN101264481A (en) * | 2008-04-30 | 2008-09-17 | 钢铁研究总院 | Cr6+ furnace cinder containing gas reduction curing method |
| CN101906500A (en) * | 2010-02-05 | 2010-12-08 | 甘肃锦世化工有限责任公司 | Method for directly producing chrome-base alloy steel by comprehensively using calcium-free chrome slag |
| CN102796879A (en) * | 2012-09-10 | 2012-11-28 | 湖北振华化学股份有限公司 | Method for preparing chromium-containing iron powder by direct reduction of calcium-free chromium slag |
| CN102864311A (en) * | 2012-09-21 | 2013-01-09 | 承德建龙特殊钢有限公司 | Recovery method of chromium in high chromium-content slag in steel making-LF (ladle furnace) working procedure |
| CN103509911A (en) * | 2013-09-30 | 2014-01-15 | 承德建龙特殊钢有限公司 | Method for directly alloying chrome-bearing steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418060A (en) * | 2016-01-07 | 2016-03-23 | 马鞍山市安工大工业技术研究院有限公司 | Method for preparing material with picotite through stainless steel slag |
| CN108467985A (en) * | 2018-04-12 | 2018-08-31 | 山西太钢不锈钢股份有限公司 | A kind of inclusion control method of pressure vessel austenitic stainless steel |
| CN108467985B (en) * | 2018-04-12 | 2020-08-25 | 山西太钢不锈钢股份有限公司 | Method for controlling inclusions in austenitic stainless steel for pressure container |
| CN114086052A (en) * | 2021-12-03 | 2022-02-25 | 宝钢德盛不锈钢有限公司 | Smelting method of low-density stainless steel |
| CN114959183A (en) * | 2022-04-28 | 2022-08-30 | 洛阳中重铸锻有限责任公司 | Refined slag system based on aluminum deoxidized Cr5 supporting roll steel and application process thereof |
| CN114959183B (en) * | 2022-04-28 | 2023-10-24 | 洛阳中重铸锻有限责任公司 | Refining slag system based on aluminum deoxidized Cr5 supporting roller steel and application process thereof |
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