CN102674866B - Pleonaste heat-insulation composite brick - Google Patents
Pleonaste heat-insulation composite brick Download PDFInfo
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- CN102674866B CN102674866B CN2012101838799A CN201210183879A CN102674866B CN 102674866 B CN102674866 B CN 102674866B CN 2012101838799 A CN2012101838799 A CN 2012101838799A CN 201210183879 A CN201210183879 A CN 201210183879A CN 102674866 B CN102674866 B CN 102674866B
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Abstract
The invention discloses a pleonaste heat-insulation composite brick which is prepared by sintering after pressing a fire-resistant layer and a heat-insulation layer. The fire-resistant layer uses high-purity magnesite/fused magnesite and synthetic magnesium-iron-aluminum spinel as the main material, and the heat-insulation layer uses forsterite as the main material; and micropowder addition and high-pressure forming are utilized to promote the brick body to be sintered at low temperature and obtain higher strength. The fire-resistant layer prevents the contained bivalent iron protoxide from converting into trivalent iron at high temperature by adding micropowder to seal pores, thereby promoting the stable iron protoxide of the cement kiln coating to maximally exist in a bivalent state; and the olivine is used as the main raw material of the heat-insulation layer, and sawdust/polylight balls are added, so that the heat-insulation layer of the brick body can obtain higher porosity, thereby further lowering the volume density and heat conductivity of the heat-insulation layer of the brick body. The composite brick disclosed by the invention has the dual functions of fire resistance and heat insulation, effectively overcomes the defect of high heat conductivity in the pleonaste, and can satisfy the user demands for fire resistance, energy saving and consumption reduction.
Description
Technical field
The present invention relates to refractory brick, especially relate to a kind of heat insulation composite brick of pleonast(e) that has mafic spinel brick and insulating brick dual characteristics concurrently.
Background technology
Because the direct of the thermal zone kiln lining life-time service of cement rotary kiln can be changed severe toxicity and carcinogenic substance in conjunction with the chance of the part chromium in magnesia chrome brick water, welding the health that threatens people, prohibited containing the chromium refractory materials for cement industry as far back as the nineties in last century European and American areas.The impact that started late by the restriction of China's economic level and Cement industry and refractory industry development, China's cement industry is a large amount of the employing directly in conjunction with magnesia chrome brick as inner lining refractory always still, day by day serious along with a series of problem of environmental pollutions of in use bringing containing chrome refractory, this problem has caused people's extensive attention, accelerates to realize that China's cement kiln refractory Trend of Chrome-free has been the development priority of industry.
Though it is high that existing mafic spinel brick has compressive strength, the characteristics such as good thermal shock stability, but thermal conductivity is higher, it is the maximum drawback of this product, because the rotary kiln shell is all exposed in air, thermal conductivity is too high will obviously increase fuel consumption, and increase the trunk temperature, for guaranteeing that the trunk temperature is not high, the user has to change in advance the brick maintenance, so not only affected the reasonable enlistment age of product, more make the user increase fuel consumption and use cost, so emerge so far from same kind of products at abroad, mafic spinel brick can not get extensive popularization in the use of cement rotary kiln transition belt always.
Summary of the invention
The object of the present invention is to provide a kind of heat insulation composite brick of pleonast(e) that has mafic spinel brick and insulating brick dual characteristics concurrently, the characteristic that this brick had both kept that the cold crushing strength of mafic spinel brick is good, good thermal shock stability, corrosion resistance are strong, be easy to stick kliner coating, have again the dual nature that thermal conductivity is low, can effectively reduce kiln ketoboidies temperature.
For achieving the above object, the present invention can take following technical proposals:
The heat insulation composite brick of pleonast(e) of the present invention, comprise the brick body, and described brick body is formed by flame retardant coating and thermofin compacting, sintering; At first after using respectively edge runner-wet mill mixing flame retardant coating and thermofin raw material, send into respectively again by plate and be divided in two-part mold cavity, take out plate, be pressed into the work in-process adobe with the pressure that is greater than 20Mpa, after 110 ℃ of dryings under weakly reducing atmosphere, fire and form through 1300-1500 ℃, the chemical composition mass percent of described finished bricks body flame retardant coating is: MgO 80-90%; Fe
2o
34-8%; Al
2o
34-8%; Surplus is impurity; The volume density of described flame retardant coating is 2.95-3.05 g/cm
3, cold crushing strength is not less than 70Mpa, and refractoriness under load is 1600-1700 ℃, and 1100 ℃ of water-cooled anti-thermal shock stability are not less than 10 times, and thermal conductivity is 3.2-3.3w/m.k; The chemical composition mass percent of described finished bricks body thermofin is MgO 60-68%, SiO
222-28%, surplus is Fe
2o
3, CaO, Al
2o
3deng impurity; The volume density of thermofin is 2.30-2.40 g/cm
3, thermal conductivity is 1.2-1.4w/m.k.
Weight part proportioning and the grain size distribution of described flame retardant coating raw material are: the highly-purity magnesite of granularity 0.1-5mm/electrosmelted magnesite clinker particulate material 45-65 part, synthetic ferro-magnesium-aluminum spinelle particulate material 8-12 part of granularity 0.1-2mm, 200 purpose reduced iron powder 0.5-2 parts, 200 purpose electrosmelted magnesite clinker fine powder 10-20 parts, 15 parts of 325-400 purpose highly-purity magnesite fine powders, calcium sulphonate solution 3-5 part.
The highly-purity magnesite of described 45-65 part granularity 0.1-5mm/electrosmelted magnesite clinker particulate material can be divided into again the highly-purity magnesite of 5mm >=granularity>3mm/electrosmelted magnesite clinker particle 20-30 part; The highly-purity magnesite of 3mm >=granularity>1mm/electrosmelted magnesite clinker particle 15-20 part; The highly-purity magnesite of 1mm >=granularity>0.1mm/electrosmelted magnesite clinker particle 10-15 part.
Weight part proportioning and the grain size distribution of described thermofin raw material are: peridotites particulate material 50-65 part of granularity 0.1-5mm, sawdust/poly-light ball 3-8 part, 200 purpose peridotites fine powder 25-35 parts, lignin liquor 3-5 part.
The peridotites particulate material of described 50-65 part granularity 0.1-5mm can be divided into again peridotites particulate material 25-30 part of 5mm >=granularity>3mm, peridotites particulate material 15-20 part of 3mm >=granularity>1mm, peridotites particulate material 10-15 part of 1mm >=granularity>0.1mm.
The invention has the advantages that the bi-material that makes function, different in kind embodies on a brick body, the existing obvious differentiation of working lining on the brick body and thermofin has realized again combining closely, make a brick body have the cold crushing strength of mafic spinel brick concurrently good simultaneously, good thermal shock stability, characteristic and the low dual characteristics that can effectively reduce the trunk temperature of insulating brick thermal conductivity that corrosion resistance is strong, be easy to stick kliner coating.
Flame retardant coating is by adding the mode of micro mist and high-pressure molding, impel the brick body complete sintering and obtain higher-strength under lower temperature conditions, to stop divalence iron protoxide contained in the brick body to change ferric probability and quantity when the condition of high temperature into by low-temperature sintering and the mode of adding the micro mist sealed porosity, make in the brick body to impel the stable iron protoxide of cement rotary kiln kliner coating to exist with the divalence state to greatest extent, also can make the brick body there is toughness preferably simultaneously.The flame retardant coating of brick body of the present invention not only has that compressive strength is high, outside good thermal shock stability, the thermal creep performance is good, refractoriness under load is high characteristics, also have than directly in conjunction with magnesia chrome brick, being easier to stick the characteristic of kliner coating simultaneously, effectively having solved magnesia chrome brick used in cement kiln and in use generated the difficult problem of sexavalent chrome to environment, is to substitute the direct desirable Chrome-free product in conjunction with magnesia chrome brick.
Thermofin adopts that thermal conductivity is low and cheap and easy to get, the peridotites that belongs to equally basic material is as main raw, and adds sawdust/poly-light ball and make brick body thermofin obtain higher void content, further reduce volume density and the thermal conductivity of brick body thermofin.
Brick body of the present invention is comprised of refractory layer (working lining) and thermofin two portions, integrate fire-resistant and heat insulating function, effectively made up the high shortcoming of mafic spinel brick thermal conductivity, can meet good Yu the energy-saving and cost-reducing dual requirements of fire performance of customer requirements, it is the novel energy-saving environment-friendly refractory materials that the new type nonaqueous cement rotary kiln transition belt is used, the present invention has accelerated the Trend of Chrome-free process of China's cement industry with refractory materials, and will further advance the energy-saving and emission-reduction of cement industry.
Embodiment
The heat insulation composite brick of pleonast(e) of the present invention, its brick body is formed by flame retardant coating and thermofin compacting, sintering; At first by flame retardant coating and thermofin raw material respectively with edge runner-wet mill routinely technique mixing after, send into respectively again by plate it is divided in two-part mold cavity, then take out plate, be pressed into the work in-process adobe with pressing machine with the pressing force that is not less than 20Mpa in mould, adobe after 110 ℃ of dryings under weakly reducing atmosphere, enter tunnel furnace and be warming up to 1300-1500 ℃, be incubated naturally cooling after 6-10 hour and the finished bricks body.
Weight part proportioning and the grain size distribution of flame retardant coating raw material wherein are: the highly-purity magnesite of 5mm >=granularity>3mm/electrosmelted magnesite clinker particle 20-30 part; The highly-purity magnesite of 3mm >=granularity>1mm/electrosmelted magnesite clinker particle 15-20 part; The highly-purity magnesite of 1mm >=granularity>0.1mm/electrosmelted magnesite clinker particle 10-15 part, synthetic ferro-magnesium-aluminum spinelle particulate material 8-12 part of granularity 0.1-2mm, 200 purpose reduced iron powder 0.5-2 parts, 200 purpose electrosmelted magnesite clinker fine powder 10-20 parts, 15 parts of 325-400 purpose highly-purity magnesite fine powders, the additional 3-5 of calcium lignosulfonate solution part.
Weight part proportioning and the grain size distribution of thermofin raw material wherein are: peridotites particulate material 25-30 part of 5mm >=granularity>3mm, peridotites particulate material 15-20 part of 3mm >=granularity>1mm, peridotites particulate material 10-15 part of 1mm >=granularity>0.1mm; Peridotites particulate material 50-65 part of granularity 0.1-5mm, sawdust/poly-light ball 3-8 part, 200 purpose peridotites fine powder 25-35 parts, additional lignin liquor 3-5 part.
The chemical composition mass percent of the finished bricks body flame retardant coating be fired into is: MgO 80-90%; Fe
2o
34-8%; Al
2o
34-8%; Surplus is impurity (SiO
2, CaO and other impurity composition total amount be at 1-2.5%); The volume density of flame retardant coating is 2.95-3.05 g/cm
3, cold crushing strength is not less than 70Mpa, and refractoriness under load is 1600-1700 ℃, and 1100 ℃ of water-cooled anti-thermal shock stability are not less than 10 times, and thermal conductivity is 3.2-3.3w/m.k; The chemical composition mass percent of finished bricks body thermofin is MgO 60-68%, SiO
222-28%, surplus is Fe
2o
3, CaO, Al
2o
3deng impurity, the volume density of thermofin is 2.30-2.40 g/cm
3, thermal conductivity is 1.2-1.4w/m.k.The performance comparison that following table is the heat insulation composite brick of pleonast(e) of the present invention and Austrian RHI company like product
.
Claims (3)
1. the heat insulation composite brick of pleonast(e), comprise the brick body, it is characterized in that: described brick body is formed by flame retardant coating and thermofin compacting, sintering; At first after using respectively edge runner-wet mill mixing flame retardant coating and thermofin raw material, send into respectively again by plate it is divided in two-part mold cavity, take out plate, be pressed into the work in-process adobe with the pressure that is greater than 20Mpa, after 110 ℃ of dryings under weakly reducing atmosphere, fire and form through 1300-1500 ℃, the chemical composition mass percent of described finished bricks body flame retardant coating is: MgO 80-90%; Fe
2o
34-8%; Al
2o
34-8%; Surplus is impurity; The volume density of described flame retardant coating is 2.95-3.05 g/cm
3, cold crushing strength is not less than 70Mpa, and refractoriness under load is 1600-1700 ℃, and 1100 ℃ of water-cooled anti-thermal shock stability are not less than 10 times, and thermal conductivity is 3.2-3.3w/m.k; The chemical composition mass percent of described finished bricks body thermofin is MgO 60-68%, SiO
222-28%, surplus is impurity; The volume density of thermofin is 2.30-2.40 g/cm
3, thermal conductivity is 1.2-1.4w/m.k;
Weight part proportioning and the grain size distribution of described flame retardant coating raw material are: granularity
0.1the highly-purity magnesite of-5mm/electrosmelted magnesite clinker particulate material 45-65 part, granularity
0.1synthetic ferro-magnesium-aluminum spinelle particulate material 8-12 part of-2mm, 200 purpose reduced iron powder 0.5-2 parts, 200 purpose electrosmelted magnesite clinker fine powder 10-20 parts, 15 parts of 325-400 purpose highly-purity magnesite fine powders, the 3-5 of calcium lignosulfonate solution part;
Weight part proportioning and the grain size distribution of described thermofin raw material are: granularity
0.1peridotites particulate material 50-65 part of-5mm, sawdust/poly-light ball 3-8 part, 200 purpose peridotites fine powder 25-35 parts, lignin liquor 3-5 part.
2. the heat insulation composite brick of pleonast(e) according to claim 1, is characterized in that: described 45-65 part granularity
0.1the highly-purity magnesite of-5mm/electrosmelted magnesite clinker particulate material is divided into again the highly-purity magnesite of 5mm>=granularity>3mm/electrosmelted magnesite clinker particle 20-30 part; The highly-purity magnesite of 3mm>=granularity>1mm/electrosmelted magnesite clinker particle 15-20 part; The highly-purity magnesite of 1mm>=granularity>0.1mm/electrosmelted magnesite clinker particle 10-15 part.
3. the heat insulation composite brick of pleonast(e) according to claim 1, is characterized in that: described 50-65 part granularity
0.1the peridotites particulate material of-5mm is divided into again peridotites particulate material 25-30 part of 5mm>=granularity>3mm, peridotites particulate material 15-20 part of 3mm>=granularity>1mm, peridotites particulate material 10-15 part of 1mm>=granularity>0.1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101838799A CN102674866B (en) | 2012-06-06 | 2012-06-06 | Pleonaste heat-insulation composite brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101838799A CN102674866B (en) | 2012-06-06 | 2012-06-06 | Pleonaste heat-insulation composite brick |
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| CN102674866A CN102674866A (en) | 2012-09-19 |
| CN102674866B true CN102674866B (en) | 2013-12-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725058B (en) * | 2015-03-10 | 2016-07-06 | 河南瑞泰耐火材料科技有限公司 | Periclase-magnesium ferrum hercynite/forsterite composite brick |
| CN105565794B (en) * | 2015-12-16 | 2019-04-23 | 淄博市鲁中耐火材料有限公司 | A kind of preparation method of low thermally conductive Mg-Al spinel brick |
| RU2694363C1 (en) * | 2016-02-19 | 2019-07-12 | Общество С Ограниченной Ответственностью "Ника-Петротэк" | Ceramic proppant and its production method |
| CN106045533A (en) * | 2016-06-03 | 2016-10-26 | 宜兴新威利成耐火材料有限公司 | Periclase-forsterite-carbon brick cup for iron and steel continuous casting tundish and preparation method of brick cup |
| CN110483020A (en) * | 2019-09-06 | 2019-11-22 | 郑州瑞泰耐火科技有限公司 | A kind of preparation method of high resistance to corrosion mafic spinel brick |
| CN113698181A (en) * | 2021-08-23 | 2021-11-26 | 郑州瑞泰耐火科技有限公司 | Low-thermal-conductivity multilayer composite magnesia-hercynite brick and preparation process thereof |
| CN113603460B (en) * | 2021-08-27 | 2023-06-06 | 郑州瑞泰耐火科技有限公司 | Micro-pore magnesia-hercynite brick for cement rotary kiln firing zone and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412629A (en) * | 2008-08-29 | 2009-04-22 | 瑞泰科技股份有限公司 | Periclase-magnesium aluminate spinel composite refractory brick and technique for producing the same |
| 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 |
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2012
- 2012-06-06 CN CN2012101838799A patent/CN102674866B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412629A (en) * | 2008-08-29 | 2009-04-22 | 瑞泰科技股份有限公司 | Periclase-magnesium aluminate spinel composite refractory brick and technique for producing the same |
| 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 |
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| CN102674866A (en) | 2012-09-19 |
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