CN1335282A - Melt particle-recombined magnesia-chrome brick and its production process - Google Patents
Melt particle-recombined magnesia-chrome brick and its production process Download PDFInfo
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- CN1335282A CN1335282A CN 01128114 CN01128114A CN1335282A CN 1335282 A CN1335282 A CN 1335282A CN 01128114 CN01128114 CN 01128114 CN 01128114 A CN01128114 A CN 01128114A CN 1335282 A CN1335282 A CN 1335282A
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- chrome
- magnesia
- temperature
- production method
- chromium sesquioxide
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Abstract
The melt particle recombined magnesia-chrome brick is produced with the material including electrically molten magnesite, magnesia, electrically molten magnesia-chrome, chromic oxide and pure chrome headings, and through the processes of crushing, mixing, forming at high pressure to density of 3.2-3.4 g/cu cm, high temperature sintering at 1800-1850 deg.c, soaking with magnesium salt solution of specific weight greater than 1.2 g/cu cm at 400-700 Pa vacuum, and drying at 100-200 deg.C The present invention has the advantages of high strength, low porosity degree, high corrosion resistance and stable and reliable production process.
Description
Technical field
The invention belongs to the formulating of recipe and the product manufacturing technology field of melt particle-recombined magnesia-chrome brick.
Technical background
The hot industry kiln as damageable zones such as secondary refining steel device such as RH stove, VOD stove, AOD stove and copper smelting furnace tuyere zones, adopts molten grain again in conjunction with, half recombined magnesia-chrome brick usually.Its weak point is, raw material specification is lower and ratio is suitable inadequately in the prescription.Aspect production method, exist:
1, forming pressure is lower, and the adobe volume density is at 3.1g/cm
3Below; Firing temperature is low, and generally at 1500～1650 ℃, finished product dipping magnesium salts treatment technology condition is undesirable.Be embodied on the finished product, intensity is low, and corrosion-resistant is poor, the void content height.
Summary of the invention
The present invention mainly solves the problem of high strength, low porosity and the high corrosion-resistant of melt particle-recombined magnesia-chrome brick, and a kind of technical formula that achieves the above object and production method are provided.
Technical scheme of the present invention is:
Adopt electrosmelted magnesite clinker, the chromium sesquioxide (Cr of magnesium oxide (MgO) content 96～98%
2O
3) be 15～40% fused magnesia-chrome and small amounts of additives chromium sesquioxide (Cr
2O
3) or high-purity fine chrome mine be raw material, be 3.2～3.4g/cm through high-pressure molding adobe volume density
3, high temperature (1800～1850 ℃) burns till with the vacuum impregnation magnesium salts handles and to make melt particle-recombined magnesia-chrome brick.
Now the technical formula and the production method division thereof of bonded magnesia chrome brick is as follows again with this molten grain:
One, technical formula
Material name specification weight percent
Electrosmelted magnesite clinker contains Mgo96～98% 10～60%
Fused magnesia-chrome contains Cr
2O
315～40%30～90%
Chromium sesquioxide or high-purity fine chrome mine 2～20%
Formula technique requires:
1, chromium sesquioxide (Cr in the goods
2O
3) content 15～30%;
2, chromium sesquioxide (Cr in the matrix
2O
3) 20～45%;
3, matrix granularity :-320 orders following (order promptly＞320) part accounts for 10～35% of total batching;
4, the ratio of electric molten magnesite chromium grain accounts for 30～90% in the goods.
Matrix above-mentioned, i.e. fine powder part in the material.
Two, production method
Production technique by raw material pulverizing, mixing, high-pressure molding, ultrahigh-temperature burn till, the vacuum impregnation magnesium salts is handled and drying process is formed.Raw material pulverizing wherein, mixing and prior art basically identical.Repugnancy is:
1, grinding particle size
Matrix-powder particle size-320 order accounts for total material 10～35% with the lower section.
2, high-pressure molding
In the powder that mixes, add paper pulp (add paper pulp amount and be existing known technology), use the pressing machine moulding, make the adobe volume density reach 3.2～3.4g/cm
3
3, ultrahigh-temperature is burnt till
Adopt hyperthermia tunnel Kiln that adobe is burnt till.Firing temperature is 1800～1850 ℃.
4, the vacuum impregnation magnesium salts is handled
Vacuum tightness is 400～700Pa.Dipping solution is proportion 〉=1.2g/cm
3Magnesium salt solution.
5, drying
Goods behind the dipping are dry under 100～200 ℃ of temperature.
The present invention does not have figure.
Claims (1)
1, a kind of melt particle-recombined magnesia-chrome brick and production method thereof, raw material are electrosmelted magnesite clinker, fused magnesia-chrome and additive, production method by pulverizing, mixing, moulding, burn till, dipping and drying process form, it is characterized in that:
Composition of raw materials is:
Material name specification weight percent
Electrosmelted magnesite clinker magnesium oxide 96～98% 10～60%
Fused magnesia-chrome chromium sesquioxide 15～40% 30～90%
Chromium sesquioxide or high-purity fine chrome mine 2～20%
Formula technique requires:
Chromium sesquioxide Cr
2O
3Content 15～30%
Chromium sesquioxide Cr in the matrix
2O
320～45%
The matrix granularity :-320 orders account for 10～35% of total batching with the lower section
Magnesium chromium grain accounts for 30～90% in the goods,
Production method,
By pulverizing, mixing, high-pressure molding, ultrahigh-temperature burn till, the vacuum impregnation magnesium salts is handled and drying process is formed,
Pulverize, pulverize, account for total material 10～35% below matrix granularity 320 orders with size reduction machinery,
Mix, the raw material after pulverizing mixed,
High-pressure molding adds quantitative paper pulp in the powder that mixes, use the pressing machine moulding, and the adobe volume density will reach 3.2～3.4g/cm
3,
Ultrahigh-temperature is burnt till, and adopts tunnel furnace to burn till, and firing temperature is 1800～1850 ℃,
The vacuum impregnation magnesium salts is handled, and after burning till product kiln discharge with proportion is 〉=1.2g/cm
3The magnesium salt solution vacuum impregnation, vacuum tightness is 400～700Pa,
Drying, the goods behind the dipping are dry under 100～200 ℃ of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01128114 CN1335282A (en) | 2001-08-30 | 2001-08-30 | Melt particle-recombined magnesia-chrome brick and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01128114 CN1335282A (en) | 2001-08-30 | 2001-08-30 | Melt particle-recombined magnesia-chrome brick and its production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1335282A true CN1335282A (en) | 2002-02-13 |
Family
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|---|---|---|---|
| CN 01128114 Pending CN1335282A (en) | 2001-08-30 | 2001-08-30 | Melt particle-recombined magnesia-chrome brick and its production process |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731121A (en) * | 2012-07-12 | 2012-10-17 | 辽宁中镁合金股份有限公司 | High-performance magnesium-aluminum-chromium composite spinel brick and manufacturing method thereof |
| CN102786314A (en) * | 2012-08-23 | 2012-11-21 | 武汉钢铁(集团)公司 | Fused-rebonded magnesite-chrome brick with excellent thermal shock resistance and production process |
| CN103332940A (en) * | 2013-06-19 | 2013-10-02 | 宜兴新威利成耐火材料有限公司 | Semi-rebonded magnesite-chrome brick for copper smelter and preparation method thereof |
| CN103553676A (en) * | 2013-10-29 | 2014-02-05 | 辽宁中兴矿业集团有限公司 | Environment-friendly magnesia-chrome brick for steel refining and non-ferrous metal smelting and preparation method thereof |
| CN104119083A (en) * | 2014-05-29 | 2014-10-29 | 长兴盟友耐火材料有限公司 | Refractory brick for waste heat power generation tuyere of rotary kiln and preparation method of refractory brick |
| CN105541352A (en) * | 2015-12-21 | 2016-05-04 | 洛阳利尔耐火材料有限公司 | Chromium-alumina-carbon bricks and preparation method therefor |
| CN106588051A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-porosity magnesite-chrome brick and preparation method thereof |
| CN106588050A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-pore magnesite-chrome brick for nonferrous metallurgy and preparation method thereof |
| CN108947501A (en) * | 2018-09-08 | 2018-12-07 | 洛阳科创新材料股份有限公司 | A kind of preparation method of long-life pocket block |
| CN109592970A (en) * | 2018-12-20 | 2019-04-09 | 瑞泰科技股份有限公司 | A kind of low chromium electric smelting recombined magnesia-chrome brick |
| CN111423210A (en) * | 2020-05-19 | 2020-07-17 | 山西盂县西小坪耐火材料有限公司 | Low-porosity clay brick and preparation method thereof |
| CN111825468A (en) * | 2020-06-30 | 2020-10-27 | 郑州华威耐火材料有限公司 | Fused and recombined magnesia-chrome brick and preparation method and application thereof |
-
2001
- 2001-08-30 CN CN 01128114 patent/CN1335282A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731121A (en) * | 2012-07-12 | 2012-10-17 | 辽宁中镁合金股份有限公司 | High-performance magnesium-aluminum-chromium composite spinel brick and manufacturing method thereof |
| CN102731121B (en) * | 2012-07-12 | 2013-09-11 | 辽宁中镁高温材料有限公司 | High-performance magnesium-aluminum-chromium composite spinel brick and manufacturing method thereof |
| CN102786314A (en) * | 2012-08-23 | 2012-11-21 | 武汉钢铁(集团)公司 | Fused-rebonded magnesite-chrome brick with excellent thermal shock resistance and production process |
| CN103332940A (en) * | 2013-06-19 | 2013-10-02 | 宜兴新威利成耐火材料有限公司 | Semi-rebonded magnesite-chrome brick for copper smelter and preparation method thereof |
| CN103553676A (en) * | 2013-10-29 | 2014-02-05 | 辽宁中兴矿业集团有限公司 | Environment-friendly magnesia-chrome brick for steel refining and non-ferrous metal smelting and preparation method thereof |
| CN103553676B (en) * | 2013-10-29 | 2015-01-14 | 辽宁中兴矿业集团有限公司 | Environment-friendly magnesia-chrome brick for steel refining and non-ferrous metal smelting and preparation method thereof |
| CN104119083A (en) * | 2014-05-29 | 2014-10-29 | 长兴盟友耐火材料有限公司 | Refractory brick for waste heat power generation tuyere of rotary kiln and preparation method of refractory brick |
| CN104119083B (en) * | 2014-05-29 | 2016-03-02 | 长兴盟友耐火材料有限公司 | Air port refractory brick and preparation method thereof is got in a kind of rotary kiln cogeneration |
| CN105541352A (en) * | 2015-12-21 | 2016-05-04 | 洛阳利尔耐火材料有限公司 | Chromium-alumina-carbon bricks and preparation method therefor |
| CN105541352B (en) * | 2015-12-21 | 2018-06-22 | 洛阳利尔耐火材料有限公司 | A kind of chromium Al2O3C Bricks and preparation method thereof |
| CN106588051A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-porosity magnesite-chrome brick and preparation method thereof |
| CN106588050A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-pore magnesite-chrome brick for nonferrous metallurgy and preparation method thereof |
| CN106588050B (en) * | 2016-12-15 | 2019-08-23 | 河南瑞泰耐火材料科技有限公司 | A kind of nonferrous smelting low stomata magnesite-chrome brick and preparation method thereof |
| CN108947501A (en) * | 2018-09-08 | 2018-12-07 | 洛阳科创新材料股份有限公司 | A kind of preparation method of long-life pocket block |
| CN109592970A (en) * | 2018-12-20 | 2019-04-09 | 瑞泰科技股份有限公司 | A kind of low chromium electric smelting recombined magnesia-chrome brick |
| CN109592970B (en) * | 2018-12-20 | 2021-10-26 | 瑞泰科技股份有限公司 | Low-chromium electric melting recombination magnesia-chrome brick |
| CN109592970B8 (en) * | 2018-12-20 | 2021-12-03 | 瑞泰科技股份有限公司 | Low-chromium electric melting recombination magnesia-chrome brick |
| CN111423210A (en) * | 2020-05-19 | 2020-07-17 | 山西盂县西小坪耐火材料有限公司 | Low-porosity clay brick and preparation method thereof |
| CN111825468A (en) * | 2020-06-30 | 2020-10-27 | 郑州华威耐火材料有限公司 | Fused and recombined magnesia-chrome brick and preparation method and application thereof |
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