CN102070346A - Preparation method of alumina-magnesia-carbon brick - Google Patents
Preparation method of alumina-magnesia-carbon brick Download PDFInfo
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- CN102070346A CN102070346A CN2009101546888A CN200910154688A CN102070346A CN 102070346 A CN102070346 A CN 102070346A CN 2009101546888 A CN2009101546888 A CN 2009101546888A CN 200910154688 A CN200910154688 A CN 200910154688A CN 102070346 A CN102070346 A CN 102070346A
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Abstract
The invention discloses a preparation method of an alumina-magnesia-carbon brick, which comprises the following steps of: mixing high alumina bauxite with the particle size of 3 to 6 mm and fused magnesia with the particle size of 0.5 to 6 mm, putting the mixture into a sand mixer, and stirring the mixture for 2 to 3 minutes; adding a proper amount of a bonding agent, and fully stirring and mixing 3 to 5 minutes; adding graphite, and fully stirring and mixing 7 to 10 minutes; adding an additive, fully stirring and mixing 3 minutes, then adding the fused magnesia fine powder, mixing 15 minutes, and then discharging the mixture; and molding the mixture on a pressure machine, and baking the mixture for more than 24 hours at the temperature of between 20 and 210 DEG C. The preparation method has the advantages that: the produced alumina-magnesia-carbon brick is applied to external refining ladles and stainless steel pouring ladles of iron and steel enterprises; the service life of the brick is about 30 times and about 800 times, which can completely meet the ladle service life required by steel production; besides, the brick is low in cost, can be produced on large scale and is easy to popularize.
Description
Technical field
The invention belongs to a kind of fire resisting material field, relate in particular to the processing method of refractory materials used when preparation is a kind of to be used for iron and steel smelting.
Background technology
Al2O3MgOC Bricks is with A1
2O
3, MgO and C are the carbon containing refractory of main component.Contain Al
2O
360%～69%, MgO7%～14%, C5%～12%.Al2O3MgOC Bricks has characteristics such as void content is low preferably, and resistance to fouling is good, in use because of forming spinel, has improved antistripping and the slag resistance and the heat-shock resistance of Al2O3MgOC Bricks, has the heavily burning of trace to expand.In order to improve its oxidation-resistance, can in batching, suitably add additives such as Si powder, Al powder, SiC powder or ferrosilicon powder, be wedding agent with the resin.Al2O3MgOC Bricks is mainly used in mammoth conveter and uhp electric arc furnace ladle lining and external refining furnace lining etc., and especially result of use is remarkable on ladle.
Summary of the invention
The objective of the invention is to solve above-described technical problem, a kind of preparation method of novel Al2O3MgOC Bricks is provided, its technical scheme is as follows:
A kind of preparation method of Al2O3MgOC Bricks, step is:
A. choose the alumine that granularity is 3-6mm, granularity is that the electrosmelted magnesite clinker mixing of 0.5-6mm is put into mixed
The sand machine stirred 2-3 minute;
B. add an amount of wedding agent, fully mixed 3-5 minute;
C. and then add graphite, fully mixed 7-10 minute;
D. add additive again, fully mix adding electrosmelted magnesite clinker fine powder mixing discharging after 15 minutes after 3 minutes;
E. behind press-molding on the pressing machine, be 20 ℃-210 ℃ in temperature and carry out baking more than 24 hours.
Mainly alumine, electrosmelted magnesite clinker and graphite in the raw material of present Al2O3MgOC Bricks, saved the use of aluminum-spinel, reason is that electrosmelted magnesite clinker and alumine originally can react under hot conditions, synthetic aluminum-spinel, owing to consider in the process of synthetic aluminum-spinel very big volumetric expansion arranged, thereby the adding of alumine adopts particulate state to finish fully, to alleviate the volumetric expansion that causes in reaction process.
The effect that the present invention produces is: the Al2O3MgOC Bricks of producing uses at the external refining ladle and the stainless steel cast ladle of iron and steel enterprise, work-ing life is about 30 times and about 800 times, can satisfy the ladle work-ing life of steel-making needs fully, and it is with low cost, can mass production, popularization easily.
Embodiment
Further specify below in conjunction with specific embodiment.
1. raw-material preparation
Granularity is the electrosmelted magnesite clinker of 0.5-6mm, and granularity is the electrosmelted magnesite clinker fine powder of 0.088mm, and granularity is the alumine of 3-6mm, graphite, and additive and wedding agent, concrete proportioning sees Table 1.
Table 1.2 group sample proportioning
| Raw material | Alumine | Electrosmelted magnesite clinker | The electrosmelted magnesite clinker fine powder | Graphite | Additive | Wedding agent |
| Granularity (mm) | 5 | 1 | 0.088 | - | - | - |
| No. 1 sample (kg) | 10 | 50 | 28 | 4.5 | 4 | 3.5 |
| No. 2 samples (kg) | 12 | 51 | 26 | 3.5 | 4 | 3.5 |
2. preparation process
According to the sample proportioning, accurately take by weighing various supplementary materials, earlier putting into alumine and the granularity that granularity is 5mm in the forced action type sand mill is the electrosmelted magnesite clinker of 1mm, stir and add wedding agent after 3 minutes, mix and put into graphite to particle after fully wetting in 5 minutes, mix 8 minutes to graphite not after kicking up, adding additive mixed 3 minutes, and then the adding granularity is the electrosmelted magnesite clinker fine powder of 0.088mm, mix after 15 minutes, discharging, press-molding is the Al2O3MgOC Bricks of 230mm * 114mm * 65mm on 400 tons of pressing machinees.Got final product in 24 hours 150 ℃ of bakings.
3. the physical and chemical experiment result sees Table 2
Table 2. sample physical and chemical experiment result
| Project | No. 1 sample | No. 2 samples |
| Apparent porosity (%) | 8 | 7 |
| Volume density (g/cm3) | 2.96 | 2.95 |
| Cold crushing strength (MPa) | 58 | 51 |
| The softening beginning temperature 0.2MPa bear a heavy burden (℃) | 1678 | 1654 |
Claims (1)
1. the preparation method of an Al2O3MgOC Bricks, step is:
A. choose the alumine that granularity is 3-6mm, granularity is that sand mill is put in the electrosmelted magnesite clinker mixing of 0.5-6mm, stirs 2-3 minute;
B. add an amount of wedding agent, fully mixed 3-5 minute;
C. and then add graphite, fully mixed 7-10 minute;
D. add additive again, fully mix adding electrosmelted magnesite clinker fine powder mixing discharging after 15 minutes after 3 minutes;
E. behind press-molding on the pressing machine, be 20 ℃-210 ℃ in temperature and carry out baking more than 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101546888A CN102070346A (en) | 2009-11-23 | 2009-11-23 | Preparation method of alumina-magnesia-carbon brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101546888A CN102070346A (en) | 2009-11-23 | 2009-11-23 | Preparation method of alumina-magnesia-carbon brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102070346A true CN102070346A (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101546888A Pending CN102070346A (en) | 2009-11-23 | 2009-11-23 | Preparation method of alumina-magnesia-carbon brick |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352978A (en) * | 2017-08-30 | 2017-11-17 | 徐州贝克福尔节能环保技术有限公司 | A kind of high-strength antiseepage brick and its preparation technology |
| CN107903039A (en) * | 2017-11-29 | 2018-04-13 | 鲁山县方圆工程技术有限公司 | A kind of magnesium composite brick for ferronickel electric furnace and preparation method thereof |
| CN112250455A (en) * | 2020-10-30 | 2021-01-22 | 德清县钢友耐火材料有限公司 | High-temperature refractory material and manufacturing process method thereof |
| CN114685172A (en) * | 2022-01-20 | 2022-07-01 | 海城利尔麦格西塔材料有限公司 | Unburned alumina-magnesia carbon brick and preparation method thereof |
-
2009
- 2009-11-23 CN CN2009101546888A patent/CN102070346A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352978A (en) * | 2017-08-30 | 2017-11-17 | 徐州贝克福尔节能环保技术有限公司 | A kind of high-strength antiseepage brick and its preparation technology |
| CN107352978B (en) * | 2017-08-30 | 2020-10-27 | 徐州贝克福尔节能环保技术有限公司 | High-strength anti-seepage brick and preparation process thereof |
| CN107903039A (en) * | 2017-11-29 | 2018-04-13 | 鲁山县方圆工程技术有限公司 | A kind of magnesium composite brick for ferronickel electric furnace and preparation method thereof |
| CN112250455A (en) * | 2020-10-30 | 2021-01-22 | 德清县钢友耐火材料有限公司 | High-temperature refractory material and manufacturing process method thereof |
| CN114685172A (en) * | 2022-01-20 | 2022-07-01 | 海城利尔麦格西塔材料有限公司 | Unburned alumina-magnesia carbon brick and preparation method thereof |
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Application publication date: 20110525 |