CN105130471A - Magnesium-aluminum-iron spinel brick and preparation method thereof - Google Patents
Magnesium-aluminum-iron spinel brick and preparation method thereof Download PDFInfo
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- CN105130471A CN105130471A CN201510569183.3A CN201510569183A CN105130471A CN 105130471 A CN105130471 A CN 105130471A CN 201510569183 A CN201510569183 A CN 201510569183A CN 105130471 A CN105130471 A CN 105130471A
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Abstract
The invention belongs to the technical field of refractory materials, and in particular discloses a magnesium-aluminum-iron spinel brick and a preparation method thereof. The magnesium-aluminum-iron spinel brick is prepared by using high-iron high-purity magnesia with grain size of 5 to 3mm, high-iron high-purity magnesia with grain size of 3 to 1mm, high-iron high-purity magnesia with grain size of 1 to 0.088mm, sintered aluminum-magnesium spinel with grain size of 4 to 1mm, electrically molten iron-aluminum spinel with grain size of 2 to 1mm, high-purity magnesia powder with grain size d<95> smaller than 0.088mm, iron scale powder with grain size d<95> smaller than 0.088mm, magnesium chloride and alkaline pulp waste liquid. The finished product is obtained by weighing the raw materials according to proportions, mixing, pressing, drying and sintering at 1550 to 1560 DEG C. By using the high-iron high-purity magnesia, the high-purity magnesia, the sintered aluminum-magnesium spinel and the electrically molten iron-aluminum spinel as main raw materials and changing the introduction manner of the material spinel, the product after high-temperature sintering has high temperature resistance, erosion resistance and thermal shock resistance performance and is low in thermal conductivity coefficient; the product is used for calcining zones and transition zones of cement kilns to improve the service life of the materials at the parts, the shell temperature can be reduced and the effects of saving energy and reducing emission are achieved.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of magnesium-aluminum-iron spinel brick and preparation method thereof.
Background technology
With the raising that energy-conserving and environment-protective require, large-size cement kiln needs a large amount of refractory materials using environment protecting and power-saving.Meanwhile, for increasing the service life, cement kiln calcining band needs to have excellent high temperature resistant, thermal shock resistance, thermal conductivity low, excellent extension kliner coating performance.
Summary of the invention
For solving the technical barrier that existing cement kiln calcining band faces, the object of the present invention is to provide a kind of magnesium-aluminum-iron spinel brick and preparation method thereof.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of magnesium-aluminum-iron spinel brick, is made up of aggregate and the additional bonding agent of powder; Wherein, in mass percentage, aggregate and powder sum are 100%; Described aggregate is: the high ferro highly-purity magnesite 10-15% of the high ferro highly-purity magnesite 15-20% of granularity 5-3mm, the high ferro highly-purity magnesite 22-28% of granularity 3-1mm, granularity 1-0.088mm, the sintered aluminium magnesia spinel 6-10% of granularity 4-1mm, the fused hercynite 3-6% of granularity 2-1mm; Described powder is: granularity d
95the highly-purity magnesite powder 28-32% of <0.088mm, granularity d
95the iron scale powder 0.5-2.0% of <0.088mm; Described bonding agent is magnesium chloride solution and alkaline pulp waste liquid, and by percentage to the quality, magnesium chloride solution, alkaline pulp waste liquid account for 1.5-2%, 0.5-2% of aggregate and powder sum respectively.Described particle diameter d
95refer to account for total amount 95% small-particle in powder and account for the oarse-grained boundary size of total amount 5%.
In mass percentage: MgO>=92% in the high ferro highly-purity magnesite of described three kinds of size specification, Fe
2o
3>=4%; Al in described sintered aluminium magnesia spinel
2o
3>=85%, MgO>=10%; Al in described fused hercynite
2o
3>=50%, Fe
2o
3>=40%; MgO>=97.2% in described highly-purity magnesite powder.
The density of described magnesium chloride solution is 1.23-1.25g/cm
3, the density of described alkaline pulp waste liquid is 1.12-1.15g/cm
3.
Preparation method: weigh each raw material by proportioning, burns till get product through mixing, compacting, drying, 1550-1560 DEG C.
The each raw material that the present invention relates to is marketable material, wherein high ferro highly-purity magnesite, and density is high, and pleonast(e) is grown mutually; Described highly-purity magnesite grain development is good, compact structure; Sintered aluminium magnesia spinel, alkali resistant erosion performance is better; Fused hercynite, high-temperature stability is good; Magnesium chloride solution, reacts with magnesia at low temperatures, is conducive to improving the dried intensity of work in-process; Alkaline pulp waste liquid, improves half-finished plasticity; Iron scale powder, it is a kind of sintering agent, can reduce goods sintering temperature.
The present invention adopts high ferro highly-purity magnesite, highly-purity magnesite, sintered aluminium magnesia spinel and fused hercynite to be main raw material, change the mode that material spinelle is introduced, after high temperature sintering, this product has high temperature resistant, the performance of anti-erosion, anti-thermal shock, low thermal conductivity; This product is used for cement kiln calcining band, transitional zone, improves this part material work-ing life, can reduce its barrel temperature, reach the effect of energy-saving and emission-reduction.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but do not limit protection scope of the present invention.
In following examples, raw material specification: MgO>=92wt%, Fe in the high ferro highly-purity magnesite of three kinds of size specification
2o
3>=4wt%; Al in sintered aluminium magnesia spinel
2o
3>=85wt%, MgO>=10wt%; Al in fused hercynite
2o
3>=50wt%, Fe
2o
3>=40wt%; MgO>=97.2wt% in described highly-purity magnesite powder; The density of described magnesium chloride solution is 1.23-1.25g/cm
3, the density of described alkaline pulp waste liquid is 1.12-1.15g/cm
3.
Embodiment 1
Material combination, in mass percentage, aggregate and powder sum are 100%, and the % of bonding agent refers to that bonding agent accounts for the mass percent of aggregate and powder sum:
The fused hercynite 3% of the sintered aluminium magnesia spinel 10%, granularity 2-1mm of the high ferro highly-purity magnesite 14%, granularity 4-1mm of the high ferro highly-purity magnesite 25%, granularity 1-0.088mm of the high ferro highly-purity magnesite 18%, granularity 3-1mm of aggregate: granularity 5-3mm;
Powder: granularity d
95the highly-purity magnesite powder 29%, granularity d of <0.088mm
95the iron scale powder 1% of <0.088mm;
Bonding agent (additional): magnesium chloride solution 1.5%, alkaline pulp waste liquid 1.5%.
Preparation method: weigh each raw material by proportioning, then the insulation 8 hours through mixing, suppressing, under dry, 1550 DEG C of high temperature, the obtained magnesium-aluminum-iron spinel brick of inspection, it has the compressive strength of 75MPa, refractoriness under load T
0.6>1700 DEG C, the heat-resistant knocking stability energy that 1100 DEG C of water-cooleds are 10 times, 1100 DEG C of thermal conductivitys are 2.6W/ (mK).
Embodiment 2
Material combination, in mass percentage, aggregate and powder sum are 100%, and the % of bonding agent refers to that bonding agent accounts for the mass percent of aggregate and powder sum:
The fused hercynite 5% of the sintered aluminium magnesia spinel 8%, granularity 2-1mm of the high ferro highly-purity magnesite 15%, granularity 4-1mm of the high ferro highly-purity magnesite 23%, granularity 1-0.088mm of the high ferro highly-purity magnesite 19%, granularity 3-1mm of aggregate: granularity 5-3mm;
Powder: granularity d
95the highly-purity magnesite powder 29%, granularity d of <0.088mm
95the iron scale powder 1% of <0.088mm;
Bonding agent (additional): magnesium chloride solution 1.5%, alkaline pulp waste liquid 1.5%.
Preparation method: weigh each raw material by proportioning, then the operation such as insulation 8 hours, inspection obtains magnesium-aluminum-iron spinel brick through mixing, suppressing, under dry, 1560 DEG C of high temperature, it has the compressive strength of 72MPa, refractoriness under load T
0.6>1700 DEG C, the heat-resistant knocking stability energy that 1100 DEG C of water-cooleds are 11 times, 1100 DEG C of thermal conductivitys are 2.62W/ (mK).
Claims (4)
1. a magnesium-aluminum-iron spinel brick, is characterized in that, is made up of aggregate and the additional bonding agent of powder; Wherein, in mass percentage, aggregate and powder sum are 100%, described aggregate is: the high ferro highly-purity magnesite 10-15% of the high ferro highly-purity magnesite 15-20% of granularity 5-3mm, the high ferro highly-purity magnesite 22-28% of granularity 3-1mm, granularity 1-0.088mm, the sintered aluminium magnesia spinel 6-10% of granularity 4-1mm, the fused hercynite 3-6% of granularity 2-1mm, described powder is: granularity d
95the highly-purity magnesite powder 28-32% of <0.088mm, granularity d
95the iron scale powder 0.5-2.0% of <0.088mm; Described bonding agent is magnesium chloride solution and alkaline pulp waste liquid, and by percentage to the quality, magnesium chloride solution, alkaline pulp waste liquid account for 1.5-2%, 0.5-2% of aggregate and powder sum respectively.
2. magnesium-aluminum-iron spinel brick as claimed in claim 1, is characterized in that in mass percentage: MgO>=92% in the high ferro highly-purity magnesite of described three kinds of size specification, Fe
2o
3>=4%; Al in described sintered aluminium magnesia spinel
2o
3>=85%, MgO>=10%; Al in described fused hercynite
2o
3>=50%, Fe
2o
3>=40%; MgO>=97.2% in described highly-purity magnesite powder.
3. magnesium-aluminum-iron spinel brick as claimed in claim 1, is characterized in that: the density of described magnesium chloride solution is 1.23-1.25g/cm
3, the density of described alkaline pulp waste liquid is 1.12-1.15g/cm
3.
4. prepare a method for the magnesium-aluminum-iron spinel brick as described in any one of claim 1-3, it is characterized in that: weigh each raw material by proportioning, burn till get product through mixing, compacting, drying, 1550-1560 DEG C.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523769A (en) * | 2016-01-14 | 2016-04-27 | 辽宁科技大学 | Low-heat-conductivity magnesia-hercynite brick used for cement rotary kiln and production method thereof |
| CN105565794A (en) * | 2015-12-16 | 2016-05-11 | 淄博市鲁中耐火材料有限公司 | Preparation method of low-heat-conductivity magnesia-alumina spinel brick |
| CN105948718A (en) * | 2016-04-28 | 2016-09-21 | 郑州瑞泰耐火科技有限公司 | Low-pore periclase-composite spinel bricks and preparation method therefor |
| CN106116609A (en) * | 2016-06-28 | 2016-11-16 | 马鞍山利尔开元新材料有限公司 | A kind of converter slag-resisting system matches grand magnesium carbonaceous bowl brick and preparation method thereof |
| CN107915474A (en) * | 2018-01-12 | 2018-04-17 | 安徽海螺暹罗耐火材料有限公司 | A kind of cement kiln clinkering zone mafic spinel brick and preparation method thereof |
| CN111170724A (en) * | 2019-12-30 | 2020-05-19 | 武汉科技大学 | Lightweight periclase-magnesium-iron-aluminum composite spinel refractory material and preparation method thereof |
| CN113429195A (en) * | 2021-07-09 | 2021-09-24 | 河南瑞泰节能新技术有限公司 | Magnesium-iron-aluminum spinel refractory material |
| CN113603460A (en) * | 2021-08-27 | 2021-11-05 | 郑州瑞泰耐火科技有限公司 | Micro-pore magnesia-hercynite brick for cement rotary kiln burning zone and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565794A (en) * | 2015-12-16 | 2016-05-11 | 淄博市鲁中耐火材料有限公司 | Preparation method of low-heat-conductivity magnesia-alumina spinel brick |
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| CN105523769A (en) * | 2016-01-14 | 2016-04-27 | 辽宁科技大学 | Low-heat-conductivity magnesia-hercynite brick used for cement rotary kiln and production method thereof |
| CN105523769B (en) * | 2016-01-14 | 2018-06-29 | 辽宁科技大学 | A kind of cement rotary kiln low heat conductivity magnesia-hercynite brick and its production method |
| CN105948718A (en) * | 2016-04-28 | 2016-09-21 | 郑州瑞泰耐火科技有限公司 | Low-pore periclase-composite spinel bricks and preparation method therefor |
| CN106116609A (en) * | 2016-06-28 | 2016-11-16 | 马鞍山利尔开元新材料有限公司 | A kind of converter slag-resisting system matches grand magnesium carbonaceous bowl brick and preparation method thereof |
| CN107915474A (en) * | 2018-01-12 | 2018-04-17 | 安徽海螺暹罗耐火材料有限公司 | A kind of cement kiln clinkering zone mafic spinel brick and preparation method thereof |
| CN111170724A (en) * | 2019-12-30 | 2020-05-19 | 武汉科技大学 | Lightweight periclase-magnesium-iron-aluminum composite spinel refractory material and preparation method thereof |
| CN111170724B (en) * | 2019-12-30 | 2022-04-12 | 武汉科技大学 | Lightweight periclase-magnesium-iron-aluminum composite spinel refractory material and preparation method thereof |
| CN113429195A (en) * | 2021-07-09 | 2021-09-24 | 河南瑞泰节能新技术有限公司 | Magnesium-iron-aluminum spinel refractory material |
| CN113603460A (en) * | 2021-08-27 | 2021-11-05 | 郑州瑞泰耐火科技有限公司 | Micro-pore magnesia-hercynite brick for cement rotary kiln burning zone and preparation method thereof |
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Application publication date: 20151209 |