CN1314618C - Method for making high-iron Mg-Fe spinel brick - Google Patents
Method for making high-iron Mg-Fe spinel brick Download PDFInfo
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- CN1314618C CN1314618C CNB031116752A CN03111675A CN1314618C CN 1314618 C CN1314618 C CN 1314618C CN B031116752 A CNB031116752 A CN B031116752A CN 03111675 A CN03111675 A CN 03111675A CN 1314618 C CN1314618 C CN 1314618C
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- iron
- magnesium
- silicon
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Abstract
The present invention discloses a method for making high-iron Mg-Fe spinel bricks. The high-iron Mg-Fe spinel bricks are calcined at high temperature and are prepared from soft burning magnesia and ferrous raw materials. The ratio of iron (Fe2O3) to silicon (SiO2) in the raw materials is 5.5 to 7.5; the ratio of magnesium (Mgo) to silicon (SiO2) is 80 to 100; the ratio of calcium (CaO) to silicon (SiO2) is equal or less than 2.5; and the raw materials are calcined into magnesium iron sand at 1600 to 1750DEGC. The magnesium iron sand is ground and sieved to obtain powder; the magnesium iron sand and the raw materials containing chromium oxide and zirconia are pulverized into granules with the diameter of 0 to 0.5mm and fine powder with the diameter less than 0.088mm for standby. The granules and fine powder are proportioned and mixed; the granules and fine powder are prepared from the following raw materials: 100 wt% of magnesium iron sand, 5 to 20 wt% of chromite and 1 to 3 wt% of zirconia. The skeletal materials of various granularity are put into a material mixer and dry mixed, after the skeletal materials are uniformly mixed, pulp binding agent, zirconia and an amount of fine powder with the diameter less than 0.08mm are added into the skeletal materials and uniformly stirred, and the skeletal materials are sufficiently wrapped by powder. Then, through molding, drying and calcining, finished products are formed. The high-iron Mg-Fe spinel bricks are prepared from the following raw materials: 100 wt% of magnesia, 1.2 to 12 wt% of Fe2O2, 0.5 to 2.4 wt% of silicon dioxide, and 1.0 to 2.0 wt% of zirconium dioxide; the ratio of iron (Fe2O3) to chromium (Cr2O3) is 1.8 to 3.0.
Description
Technical field
The present invention relates to refractory materials, especially for the design and the manufacturing technology field of the basic refractory of cement rotary kiln.
Background technology
The pleonast(e) brick is a kind of cement rotary kiln that is specifically designed to, the special-purpose basic refractory of particularly large-scale new type nonaqueous cement kiln clinkering zone, and it not only has good use properties, and has tangible environment-friendly function.According to the development trend of present Cement industry, this refractory materials will occupy critical role in the development of Cement industry.Domestic cement rotary kiln refractory materials, especially clinkering zone mainly use with refractory materials and contain Cr
2O
36～10% various magnesia chrome bricks.According to the environment for use and the working condition of cement kiln, magnesia chrome brick is in the market all failed to obtain ideal and is used the result.Mean life is only about 6 months.And 6～10% Cr
2O
3Content is higher, can the weighting ring environment pollution.Cement kiln causes environmental pollution problems to be after using with magnesia chrome brick:
Though the chromium component that contains in the magnesia chrome brick is with Cr in the brickmaking process
3+Form exist.But in the use of magnesia chrome brick in cement kiln, because Cr
3+At high temperature with kiln gas, kiln material in alkali (Na
2O and K
2O) combine, form the hexavalent chromium compound-K of severe toxicity
2CrO
4Or Na
2CrO
4Under the condition that sulphur, chlorine, alkali all exist, form K
2(Cr, S) O
4Or Na
2(Cr, S) O
4These hexavalent chromium compounds all are the aqueous fusion materials of severe toxicity, and are a part of along with waste gas, dust escape.A part residues in polluted source in the useless brick of dismounting, causes the harm to environment.This product is at flue gas, can absorb dust, tap water, Cement industry waste water, cement kiln and contain and very easily exceed standard the solution of need making great efforts aspect the dischargings such as chromium waste material.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of high ferro pleonast(e) brick, its technical scheme are introduced iron oxide composition in the process of raw material manufacturing and brickmaking, and by process means, make Fe
2+/ Fe
3+Ratio reach best, make iron oxide composition obtain best configuration in quite at periclasite spinel and silicate.Add and contain ZrO
2Minor component finally makes high ferro pleonast(e) brick.The way that solves just is to use the refractory materials of low chromium even Chrome-free, this method can be according to the Working environment of cement rotary kiln, utilize its exclusive performance, the special problem that solves the cement kiln clinkering zone, increase the service life significantly, alleviating until eliminating the pollution of chromium public hazards, is the purpose that we develop pleonast(e).The pleonast(e) brick promptly is a kind of low chromium basic refractory.Advantage of the present invention is that high pleonast(e) brick has the ferric oxide Fe more higher than conventional magnesia chrome brick
2O
3Content, very low chromium sesquioxide Cr
2O
3Content.Be used for the ferric oxide Fe of cement slurry to brick
2O
3Good avidity is arranged, and therefore, the pleonast(e) brick can make the cement kiln clinkering zone hang up properly, hang firm kliner coating; thereby protection refractory brick body; alleviate the destruction of its suffered thermal stresses, chemical erosion, mechanical stress, increase the service life greatly, reduce refractory consumption rate.
The present invention does not have figure.
Embodiment
This preparation technology by raw material high temperature burn till, crush and screen, prepare burden batch mixing, shaping and drying, burn till 5 procedures and form, existing division is as follows:
Raw material high temperature burns till, and is raw material with light calcined magnesia and iron-bearing material (as ferric oxide etc.), the iron silicon ratio Fe of raw material
2O
3/ SiO
2=5.5～7.5, magnesium silicon compares MgO/SiO
2=80～180, calcium silicon compares CaO/SiO
2≤ 2.5, under 1600～1750 ℃ of temperature condition, burn till magnesium iron sand.
Crush and screen, with magnesium iron sand, trioxygen-containingization two chromium Cr
2O
3Raw mineral materials and zirconium white ZrO
2The particle of raw material separated pulverizing one-tenth≤5mm, and＜fine powder of 0.088mm, stand-by.
Batching and batch mixing, material name reach therebetween, and weight part is a magnesium iron sand 100.Trioxygen-containingization two chromium Cr
2O
3Raw mineral materials 5～20, zirconium white raw material 1～3.Earlier various granularity aggregates are dropped into do in the mixers and mix, after mixing, add interim wedding agent, as paper pulp etc., the fine powder of adding＜0.088mm stirs again, makes powder form abundant parcel to aggregate.
Shaping and drying according to brick type and dimensional requirement, adds to mixture in the mould extrusion forming.In 100～200 ℃ of temperature, be dried to adobe water content＜0.5%.
Burn till, dried adobe is delivered in the calcining kiln burnt till, be finished product, the finished product ingredients weight parts must be:
Magnesium oxide MgO 100
Ferric oxide Fe
2O
31.2～12
Silicon-dioxide SiO
20.5～2.4
Zirconium dioxide ZrO
21.0～20
Siderochrome compares Fe
2O
3/ Cr
2O
31.8～3.0.
Claims (1)
1, a kind of manufacture method of high ferro pleonast(e) brick by raw material high temperature burn till, crush and screen, prepare burden batch mixing, shaping and drying and burn till 5 procedures and form, is characterized in that:
Raw material high temperature burns till, and is raw material with light calcined magnesia and iron-bearing material, the iron silicon ratio Fe of raw material
2O
3/ SiO
2=5.5～7.5, magnesium silicon compares MgO/SiO
2=80～180, calcium silicon compares CaO/SiO
2≤ 2.5, above-mentioned raw materials burns till magnesium iron sand under 1600～1750 ℃ of temperature condition,
Crush and screen, with magnesium iron sand, trioxygen-containingization two chromium Cr
2O
3Raw mineral materials and zirconium white ZrO
2The particle of raw material separated pulverizing one-tenth≤5mm, and＜fine powder of 0.088mm, stand-by,
The batching and batch mixing, the title of various raw materials and therebetween weight part be magnesium iron sand 100, trioxygen-containingization two chromium Cr
2O
3Raw mineral materials 5～20, zirconium white raw material 1～3 earlier will above-mentioned various granularity aggregates be thrown to do to the mixer and is mixed, and mixes back adding paper pulp wedding agent, the fine powder of adding＜0.088mm stirs again, makes powder form abundant parcel to aggregate,
Shaping and drying according to brick type and dimensional requirement, adds to extrusion forming in the mould with mixture, is dried to water content＜0.5% under 100～200 ℃ of temperature condition,
Burn till, dried adobe is delivered to burn till in the calcining kiln be finished product,
The product component weight part is:
Magnesium oxide MgO 100
Ferric oxide Fe
2O
31.2～12
Silicon-dioxide SiO
20.5～2.4
Zirconium dioxide ZrO
21.0～20
Siderochrome compares Fe
2O
3/ Cr
2O
31.8～3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031116752A CN1314618C (en) | 2003-05-14 | 2003-05-14 | Method for making high-iron Mg-Fe spinel brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031116752A CN1314618C (en) | 2003-05-14 | 2003-05-14 | Method for making high-iron Mg-Fe spinel brick |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1451629A CN1451629A (en) | 2003-10-29 |
| CN1314618C true CN1314618C (en) | 2007-05-09 |
Family
ID=29222751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031116752A Expired - Fee Related CN1314618C (en) | 2003-05-14 | 2003-05-14 | Method for making high-iron Mg-Fe spinel brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1314618C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001858A (en) * | 2010-09-21 | 2011-04-06 | 河南火宝耐火材料有限公司 | High-tenacity mafic spinel brick |
| CN102167608A (en) * | 2011-03-09 | 2011-08-31 | 淄博工陶耐火材料有限公司 | Periclase-pleonaste-hercynite brick for high temperature zone of cement kiln and preparation method thereof |
| CN102701759B (en) * | 2012-06-06 | 2013-12-11 | 郑州真金耐火材料有限责任公司 | Pleonaste brick |
| CN105294130B (en) * | 2015-11-23 | 2017-06-23 | 大石桥市中建镁砖有限公司 | Preparation method of the pre-reaction in situ in conjunction with composite brick |
| CN108329016A (en) * | 2018-03-09 | 2018-07-27 | 海城市祥程矿业有限公司 | A kind of technique that shaft furnace burns magnesium iron spinel sand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2016875C1 (en) * | 1982-04-09 | 1994-07-30 | Восточный научно-исследовательский и проектный институт огнеупорной промышленности | Roastingless refractory material |
| EP1052369A2 (en) * | 1999-05-13 | 2000-11-15 | Halliburton Energy Services, Inc. | Downhole packing apparatus |
| CN1378997A (en) * | 2001-04-05 | 2002-11-13 | 耐火技术控股股份有限公司 | Synthetic refractory material for refractory product and its production method |
-
2003
- 2003-05-14 CN CNB031116752A patent/CN1314618C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2016875C1 (en) * | 1982-04-09 | 1994-07-30 | Восточный научно-исследовательский и проектный институт огнеупорной промышленности | Roastingless refractory material |
| EP1052369A2 (en) * | 1999-05-13 | 2000-11-15 | Halliburton Energy Services, Inc. | Downhole packing apparatus |
| CN1378997A (en) * | 2001-04-05 | 2002-11-13 | 耐火技术控股股份有限公司 | Synthetic refractory material for refractory product and its production method |
Non-Patent Citations (1)
| Title |
|---|
| 高铁低铬碱性砖的特点及在水泥窑烧成带的应用 常亮 杨宗欣，中国水泥，第12期 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1451629A (en) | 2003-10-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20031029 Assignee: Yingkou Gaoke Synthetic Refractory Co., Ltd. Assignor: Dashiqiao Brickfield, Chinese Building Material Science Research Institute Contract record no.: 2012210000102 Denomination of invention: Method for making high-iron Mg-Fe spinel brick Granted publication date: 20070509 License type: Exclusive License Record date: 20120726 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 Termination date: 20140514 |