KR100580120B1 - Method for treatment magnesium-chromium brick - Google Patents
Method for treatment magnesium-chromium brick Download PDFInfo
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- KR100580120B1 KR100580120B1 KR1020040110143A KR20040110143A KR100580120B1 KR 100580120 B1 KR100580120 B1 KR 100580120B1 KR 1020040110143 A KR1020040110143 A KR 1020040110143A KR 20040110143 A KR20040110143 A KR 20040110143A KR 100580120 B1 KR100580120 B1 KR 100580120B1
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- Prior art keywords
- waste
- lead
- acid
- macro
- reaction
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 20
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 title 1
- 239000011449 brick Substances 0.000 title 1
- 239000002699 waste material Substances 0.000 claims abstract description 70
- 239000002253 acid Substances 0.000 claims abstract description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010298 pulverizing process Methods 0.000 claims abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims 1
- 239000004200 microcrystalline wax Substances 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000001000 micrograph Methods 0.000 abstract description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 2
- 229910052749 magnesium Inorganic materials 0.000 abstract 2
- 239000011777 magnesium Substances 0.000 abstract 2
- 239000006227 byproduct Substances 0.000 abstract 1
- 238000003900 soil pollution Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/047—Refractories from grain sized mixtures containing chromium oxide or chrome ore
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
본 발명은 폐마그크로 연와의 처리방법에 관한 것으로, 특히 선별 수집된 폐마그크로 연와를 분쇄한 후, 폐산을 첨가하여 반응시켜 제철소 부생 폐기물인 폐마그크로 연와의 매립양을 절감함으로써 매립지 부족 및 토양 환경오염의 문제점을 해결하여 친환경적일 뿐만 아니라, 동시에 폐산의 후처리 비용을 절감하여 경제적인 폐마그크로 연와의 처리방법에 관한 것이다.The present invention relates to a method for treating waste micrographs with waste magnesium, and in particular, after pulverizing sorted and collected waste magnets, waste acid is added and reacted to reduce the amount of landfill with waste magnesium waste, a by-product of steel mill waste. The present invention relates to an economical method for treating waste macro lead, which is not only environmentally friendly by solving the problems of soil pollution, but also reduces the post-treatment cost of waste acid.
폐마그크로 연와, 폐산, 폐황산, 매립 절감Waste Macro Lead, Waste Acid, Waste Sulfuric Acid, Reclamation
Description
본 발명은 폐마그크로 연와의 처리방법에 관한 것으로, 더욱 상세하게는 전량 매립되던 폐마그크로 연와로 인한 매립지 부족 및 토양 환경오염의 문제점을 해결하여 친환경적일 뿐만 아니라, 동시에 폐산의 후처리 비용을 절감하여 경제적인 폐마그크로 연와의 처리방법에 관한 것이다.The present invention relates to a method for treating waste microwake, and more particularly, it is environmentally friendly by solving the problems of landfill shortage and soil environmental pollution due to waste muckwae, which is a whole amount of landfill. The present invention relates to a method for treating economical waste-macro lead.
마그크로 연와는 가혹한 정련조업에 적합한 내열성 및 내식성을 보유하고 있어 제강용 전기 정련로의 로내벽 작업 내화물로 널리 사용되고 있다.Magcro soft ware has heat resistance and corrosion resistance suitable for severe refining operations, and is widely used as a refractory material for furnace walls in steel refining furnaces.
상기와 같은 마그크로 연와를 로내벽 작업 내화물로 사용 후 발생되는 폐마그크로 연와는 크롬을 함유하고, 상기 크롬으로 인한 6가 크롬의 발생가능성으로 후처리 방법에 있어 많은 어려움을 가지고 있으며, 현재 전량을 단순매립에 의해 폐기하고 있는 실정이다. 그러나 점차 매립장 부지가 감소함에 따라 매립양의 절대치를 감소시킬 필요가 있으며, 이에 대한 연구가 지속적으로 이루어지고 있다.The waste Magcro lead generated after using the above-mentioned Magcro lead as the refractory wall work refractory contains chromium and has a lot of difficulties in the post-treatment method due to the possibility of hexavalent chromium due to the chromium, and the present amount Is being disposed of by simple landfill. However, as the landfill site gradually decreases, it is necessary to reduce the absolute value of the landfill amount, and research on this is ongoing.
그러나, 상기 폐마그크로 연와 폐기물을 재활용하는 방법의 부재와 처리방법이 있다 할지라도 전체 폐마그크로 연와 폐기물을 처리하기에는 부적합하다는 문제 점이 있었다.However, there is a problem that even if there is an absence and treatment method of recycling the waste micro lead and waste, it is unsuitable for treating the waste micro lead and waste.
대한민국 특허출원 제2003-0071725호에는 폐마그크로를 처리하기 위하여 폐연와 성분 중의 크로마이트 성분을 선별적으로 추출하여 복사단열 코팅제의 필러 물질로서 사용하는 방법에 대하여 개시하고 있으나, 상기 방법은 사용량이 절대적으로 부족하여 전체 폐연와 폐기물을 처리하기에는 어려움이 있었다.Korean Patent Application No. 2003-0071725 discloses a method of selectively extracting chromite components from waste smoke and components to treat waste magcro and using them as filler materials for radiation insulation coatings. There was an absolute shortage of difficulties in handling the entire waste smoke and waste.
상기와 같은 종래기술의 문제점을 해결하고자, 본 발명은 전량 매립되던 폐마그크로 연와로 인한 매립지 부족 및 토양 환경오염의 문제점을 해결하여 친환경적인 폐마그크로 연와의 처리방법을 제공하는 것을 목적으로 한다.In order to solve the problems of the prior art as described above, an object of the present invention to solve the problems of landfill shortage and soil environmental pollution due to the waste-macro lead that was embedded in the whole amount to provide an environmentally friendly method for treating waste-macro lead. .
본 발명의 다른 목적은 폐마그크로 연와의 매립양 감소와 동시에 제철소에서 부수적으로 발생하는 폐산의 후처리 비용을 절감하여 경제적인 폐마그크로 연와의 처리방법을 제공하는 것이다.Another object of the present invention is to provide an economical method for treating waste microwaste by reducing the amount of landfill with waste microwaste and at the same time reducing the post-treatment cost of waste acid generated in an ironworks.
상기 목적을 달성하기 위하여, 본 발명은 폐마그크로 연와의 처리방법에 있어서,In order to achieve the above object, the present invention provides a method for treating waste micrographs,
a) 폐마그크로 연와를 선별 수집하는 단계;a) screening and collecting the spent straws;
b) 상기 a)단계에서 선별 수집된 폐마그크로 연와를 분쇄하는 단계; 및b) pulverizing the lead into the waste magnets selected and collected in step a); And
c) 상기 b)단계에서 분쇄된 폐마그크로 연와에 폐산을 첨가하여 반응시키는 단계c) reacting by adding waste acid to the waste magnesia milled in step b).
를 포함하는 것을 특징으로 하는 폐마그크로 연와의 처리방법을 제공한다.It provides a method for treating waste microwaste comprising a.
이하 본 발명을 상세하게 설명한다. Hereinafter, the present invention will be described in detail.
본 발명의 폐마그크로 연와는 폐마그크로 연와를 선별 수집하는 단계, 상기 선별 수집된 폐마그크로 연와를 분쇄하는 단계, 및 상기 분쇄된 폐마그크로 연와에 폐산을 첨가하여 반응시키는 단계를 통하여 처리되는 것을 특징으로 한다.Waste microcrop of the present invention is treated through the step of collecting and collecting waste macrocrops, pulverizing the screened collected waste macrocrops, and reacting by adding waste acid to the pulverized waste macrocrops; It is characterized by.
본 발명에 사용되는 상기 폐마그크로 연와는 제강용 전기 정련로의 로내벽 작업 내화물로 사용되는 마그크로계 내화물을 정련조업한 후 발생되는 통상의 폐마그크로 연와를 사용할 수 있다.As the waste microwake used in the present invention, a conventional waste microwake produced after refining and manufacturing a magnesia-based refractory material used as a refractories in the furnace wall of a steelmaking refining furnace can be used.
상기 폐마그크로 연와는 선별 수집하고 분쇄하여 조대 입자로 준비한다.The waste macroswax is collected and ground to prepare as coarse particles.
상기 분쇄는 이후 폐산과의 반응시 반응되는 폐마그크로 연와의 비표면적을 증가시켜 반응성을 향상시키기 위하여 실시한다. 상기와 같은 통상의 분쇄기를 사용하여 실시할 수 있으며, 구체적으로 죠크러셔 등을 사용할 수 있다.The pulverization is then carried out to increase the specific surface area of the waste macro lead reacted with the waste acid to improve reactivity. It can be carried out using a conventional pulverizer as described above, specifically, jaw crusher or the like can be used.
상기 분쇄된 폐마그크로 연와의 조대 입자는 평균입경이 최대 200 ㎜인 것이 바람직하며, 더욱 바람직하게는 최대 100 ㎜, 가장 바람직하게는 최대 50 ㎜인 것이 좋다.It is preferable that the coarse particles of the pulverized waste macro lead have an average particle diameter of at most 200 mm, more preferably at most 100 mm, most preferably at most 50 mm.
상기와 같이 분쇄된 폐마그크로 연와는 이후 폐산과 반응시키는데, 이때 상기 폐산은 제철소에서 부수적으로 발생하는 통상의 폐산을 사용할 수 있으며, 구체적으로 폐황산 또는 폐염산 등을 용액 상태로 사용할 수 있다.The pulverized waste straw as described above is then reacted with waste acid, in which the waste acid may be used conventional waste acid incidentally occurring at the steel mill, and specifically, waste sulfuric acid or waste hydrochloric acid may be used as a solution.
구체적으로, 상기 반응은 폐마그크로 연와 내에 함유되어 있는 Free MgO 성분과 폐산(H2SO4)을 반응시켜 MgSO4를 용출함으로써 폐마그크로 연와 내의 MgO가 감 소하게 되고 이에 따라 폐마그크로 연와의 총질량이 감소하게 된다(하기 반응식 1).Specifically, the reaction is performed by reacting the free MgO component contained in the waste macro lead with waste acid (H 2 SO 4 ) to elute MgSO 4 , thereby reducing the MgO in the waste macro lead and thus reducing the waste macro lead. The total mass of and decreases (Scheme 1).
[반응식 1]Scheme 1
상기 반응은 폐산 용액의 pH가 서로 근접해지는 시점, 즉 pH 6∼8에서 반응을 종료한다.The reaction is terminated at the time when the pH of the spent acid solution approaches each other, that is, pH 6-8.
상기 반응은 통상의 수직 필터링 장치를 사용할 수 있으며, 특히 반응 종료의 확인을 위하여 pH meter가 부착된 수직 필터링 장치를 사용하는 것이 더욱 좋다.The reaction may use a conventional vertical filtering device, and in particular, it is better to use a vertical filtering device with a pH meter to confirm the completion of the reaction.
상기와 같은 반응을 통하여 폐마그크로 연와 매립양을 절감하여 전량 매립되던 폐마그크로 연와로 인한 매립지 부족 및 토양 환경오염의 문제점을 해결하여 친환경적일 뿐만 아니라, 동시에 폐산을 중화함으로써 폐산 후처리 비용을 절감할 수 있다.Through the above reaction, waste magcro lead and landfill amount are reduced to solve the problems of landfill shortage and soil environmental pollution caused by waste macro lead, which are all landfilled. Can be saved.
이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시하나, 하기 실시예는 본 발명을 예시하는 것일 뿐 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다.Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.
[실시예]EXAMPLE
실시예 1Example 1
POSCO 정련로 수리시 방출되는 폐마그크로 연와 중 RDB-71C 연와를 분리 수 거한 후, 상기 분리 수거된 RDB-71C 연와를 조크러셔를 이용하여 20 ㎜의 크기로 분쇄하였다. After collecting and separating the RDB-71C soft-wax in the waste-macro soft lead discharged at the time of POSCO refining, the separated collected RDB-71C soft-core was ground to a size of 20 mm using a jaw crusher.
그 다음 pH meter가 장착된 수직 필터링 장치에 상기 분쇄된 RDB-71C 연와 분쇄물을 넣은 후 폐황산 용액을 필터링 장치의 상부로부터 하부로 통과시키면서 반응시키고, pH 6∼8에서 반응을 종료시켜 반응생성물을 용출시켰다. Then, the pulverized RDB-71C lead and the pulverized product were put in a vertical filtering device equipped with a pH meter, and the waste sulfuric acid solution was reacted while passing from the top to the bottom of the filtering device, and the reaction product was terminated at pH 6-8. Eluted.
실험결과, 상기와 같은 반응 전 폐마그크로 연와내에 존재하는 약 45 중량%의 MgO 함량이 반응 후 2 중량% 미만으로 감소함으로써 90 % 이상이 저하되었음을 확인할 수 있었으며, 이로부터 폐마그크로 연와의 총질량이 30 % 이상 감소되어 매립양을 절감할 수 있음을 알 수 있었다.As a result, it was confirmed that the MgO content of about 45% by weight in the pulmonary microwaste before the reaction was reduced to less than 2% by weight after the reaction, resulting in a reduction of 90% or more. It was found that the mass was reduced by more than 30%, thereby reducing the amount of landfill.
본 발명에 따르면 폐마그크로 연와 매립양을 절감하여 전량 매립되던 폐마그크로 연와로 인한 매립지 부족 및 토양 환경오염의 문제점을 해결하여 친환경적일 뿐만 아니라, 동시에 폐산을 중화함으로써 폐산 후처리 비용을 절감할 수 있는 효과가 있다.According to the present invention, it is not only environmentally friendly to solve the problems of landfill shortage and soil environmental pollution due to waste macrowaste, which has been completely reclaimed by reducing the amount of landfill waste and waste, and at the same time, neutralizes the waste acid to reduce the waste acid post-treatment cost. It can be effective.
이상에서 본 발명의 기재된 구체예에 대해서만 상세히 설명되었지만, 본 발명의 기술사상 범위 내에서 다양한 변형 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속함은 당연한 것이다.Although only described in detail with respect to the described embodiments of the present invention, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, it is natural that such variations and modifications belong to the appended claims. .
Claims (5)
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| KR1020040110143A KR100580120B1 (en) | 2004-12-22 | 2004-12-22 | Method for treatment magnesium-chromium brick |
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| KR1020040110143A KR100580120B1 (en) | 2004-12-22 | 2004-12-22 | Method for treatment magnesium-chromium brick |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148369A (en) * | 2014-07-27 | 2014-11-19 | 广西梧州龙鱼漆业有限公司 | Regeneration method for paint waste residues |
| CN112500136A (en) * | 2020-12-07 | 2021-03-16 | 海城利尔麦格西塔材料有限公司 | Production method of magnesia-chrome brick |
| CN113387711A (en) * | 2015-07-10 | 2021-09-14 | 冷水江市高科窑炉耐火材料有限公司 | Production process of drainage sand |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148369A (en) * | 2014-07-27 | 2014-11-19 | 广西梧州龙鱼漆业有限公司 | Regeneration method for paint waste residues |
| CN113387711A (en) * | 2015-07-10 | 2021-09-14 | 冷水江市高科窑炉耐火材料有限公司 | Production process of drainage sand |
| CN112500136A (en) * | 2020-12-07 | 2021-03-16 | 海城利尔麦格西塔材料有限公司 | Production method of magnesia-chrome brick |
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