CN103044041A - Alumina-magnesia brick for refined steel ladle wall - Google Patents
Alumina-magnesia brick for refined steel ladle wall Download PDFInfo
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- CN103044041A CN103044041A CN2012105787851A CN201210578785A CN103044041A CN 103044041 A CN103044041 A CN 103044041A CN 2012105787851 A CN2012105787851 A CN 2012105787851A CN 201210578785 A CN201210578785 A CN 201210578785A CN 103044041 A CN103044041 A CN 103044041A
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Abstract
The invention discloses an alumina-magnesia brick for a refined steel ladle wall. The alumina-magnesia brick comprises the following raw materials by weight percent and in particle size: 25-35% of brown corundum with the particle size of 8-3 mm, 20-35% of brown corundum with the particle size of 3-1mm, 5-20% of spinel with the particle size of 1-0.088mm, 15-25% of sub-white fused alumina with the particle size of less than 0.088 mm, 1-7% of magnesium sand powder, and 0.5-3% of additive, wherein the additive is a mixture of metal aluminum powder and alumina micro-powder in the mass ratio of 1: (1.5-3.0). A manufacturing method comprises the following steps: pre-mixing powders in a sand mixer, mixing for further use, putting the granular materials in the sand mixer and mixing for 3-5 minutes firstly during mixing, then adding a bonding agent phenolic resin, mixing for 5-8 minutes, then putting the pre-mixed powder in the sand mixer and mixing for 15-20 minutes, preparing paste materials and discharging, putting into a friction brick press for molding, and preparing into green bricks; and naturally cooling the thermally treated green bricks to obtain the finished products of the alumina-magnesia brick.
Description
Technical field:
The present invention relates to a kind of refining ladle Bao Biyong alumina-magnesia brick.
Background technology:
Along with the development of continuous casting and furnace outer refining technology, the refined steel ladles refractory materials is had higher requirement.The Bao Biyong magnalium carbon material that originally uses, exist work-ing life low, problem such as impact productions etc., and high carbon content must cause ladle heat radiation quickening, and molten steel is had the impact of carburetting, for keeping the cleaning of molten steel, and from the consideration of energy-saving heat preserving aspect, the carbon content of material should be low as much as possible, and require cylinder-packing long-lived as much as possible, corrode like this and lack, refractory materials fuses into the just few of molten steel.Although higher work-ing life for the Bao Biyong prefabricated section, production process is comparatively numerous and diverse, need to meticulously operates at aspects such as cast, maintenance, bakings, and owing to using the oversintering in later stage, be prone to and prick the steel phenomenon.
Summary of the invention:
The objective of the invention is the simple a kind of refining ladle Bao Biyong alumina-magnesia brick of impact, long service life, good heat insulating, preparation that a kind of carbon content is low, carburetting can not arranged molten steel.
The objective of the invention is to be realized by following mode:
A kind of refining ladle Bao Biyong alumina-magnesia brick, its raw materials used and granularity is by mass percentage:
Palm fibre corundum: 8-3mm, 25-35%, 3-1mm, 20-35%;
Spinel: 1-0.088mm, 5-20%;
Sub-white corundum:＜0.088mm, 15--25%;
Magnesia powder:＜0.088mm 1--7%;
Additive:＜0.088mm, 0.5--3%;
Wherein additive is the mixture of metallic aluminium powder and alumina powder, and the mass ratio of the two is 1:1.5 ~ 3.0; The granularity of metallic aluminium powder is＜0.074mm; Alumina powder is d
50=5 μ m.
A kind of method of making described refining ladle Bao Biyong alumina-magnesia brick is as follows:
(a), powder premix: powder is prepared burden according to above-mentioned mass percent, require permissible error ± 1% during batching, all powders premix 10 ~ 15 minutes in sand mill is stand-by;
(b) batch mixing:
Particulate material is prepared burden according to described mass percent, require permissible error ± 1% during batching, put in people's sand mill mixed after 2-5 minute, add wedding agent resol according to described refining ladle wall with 3～3.5% of the raw materials used total mass of alumina-magnesia brick, mixed 5-8 minute, again the mixed powder that makes in the step (a) is put into sand mill and mixed with particulate material 15-20 minute, make the pug discharging, pug requires not have siccative, do not have walk;
(c), moulding:
The pug that makes in the step (b) is put into the friction press moulding, make adobe;
(d), thermal treatment
Behind the adobe seasoning 24h with compression moulding in the step (c), push dry kiln and heat-treat, temperature to heating, wherein is not less than 10h by low 60 ~ 70 ℃ of time of drying, be not less than 12h 110 ~ 120 ℃ of time of drying, be not less than 12h 180-200 ℃ of time of drying.
(e), behind the adobe naturally cooling after the thermal treatment, namely get the finished product of a kind of refining ladle Bao Biyong alumina-magnesia brick of the present invention.
Advantage of the present invention is: the brick that this proportioning is produced uses than conventional aluminium magnesia carbon brick Service life 15-30 time in refining ladle, and is suitable with the prefabricated section life-span.And the prefabricated section production process is comparatively numerous and diverse, need to meticulously operate at aspects such as cast, maintenance, bakings.This art production process is simple, and production efficiency is high, is easy to control quality.
Embodiment:
Embodiment 1:
A kind of refining ladle Bao Biyong alumina-magnesia brick, its raw materials used and granularity is by mass percentage:
Palm fibre corundum 8-3mm, 35%, 3-1mm, 26%;
Spinel 1-0.088mm:16%;
Sub-white corundum＜0.088mm:15%;
Magnesia powder＜0.088mm, 5%;
Granularity is＜metallic aluminium powder and the d of 0.074mm
50The mixture 3% of=5 μ m alumina powders; Wherein, granularity is＜metallic aluminium powder and the d of 0.074mm
50The mass ratio 1:2 of the mixture of=5 μ m alumina powders.
A kind of method of making described refining ladle Bao Biyong alumina-magnesia brick is as follows:
(a) powder premix:
Powder is prepared burden according to above-mentioned mass percent, require permissible error ± 1% during batching, all powders premix 10 minutes in sand mill is stand-by;
(b), batch mixing:
Particulate material is prepared burden according to above-mentioned mass percent, require permissible error ± 1% during batching, after above-mentioned particulate material put in people's sand mill mixed 3 minutes, add wedding agent resol according to 3.3% of described refining ladle Bao Biyong alumina-magnesia brick total mass, mixed 5 minutes, again the powder mix that makes in the step (a) is put into sand mill and mixed with particulate material 20 minutes, make the pug discharging, pug requires not have siccative, do not have walk;
(c), moulding:
The pug that makes in the step (b) is put into the friction press moulding, make adobe;
(d), thermal treatment
Behind the adobe seasoning 24h with compression moulding in the step (c), push dry kiln and heat-treat, temperature heats from low to high, wherein is not less than 10h 60 ~ 70 ℃ of time of drying, be not less than 12h 110 ~ 120 ℃ of time of drying, be not less than 12h 180-200 ℃ of time of drying.
(e), behind the adobe naturally cooling after the thermal treatment, be finished product of the present invention.
Embodiment 2:
A kind of refining ladle Bao Biyong alumina-magnesia brick, its raw materials used and granularity is by mass percentage:
Palm fibre corundum 8-3mm, 30%, 3-1mm, 22%;
Spinel 1-0.088mm:20%;
Sub-white corundum＜0.088mm:21%;
Magnesia powder＜0.088mm, 6%;
Granularity is＜metallic aluminium powder and the d of 0.074mm
50The mixture 1% of=5 μ m alumina powders; Wherein, granularity is＜metallic aluminium powder and the d of 0.074mm
50The mass ratio 1:2 of the mixture of=5 μ m alumina powders.
Embodiment 3:
A kind of refining ladle Bao Biyong alumina-magnesia brick, its raw materials used and granularity is by mass percentage:
Palm fibre corundum 8-3mm, 26%, 3-1mm, 30%;
Spinel 1-0.088mm:14%;
Sub-white corundum＜0.088mm:24%;
Magnesia powder＜0.088mm, 4%;
Granularity is＜metallic aluminium powder and the d of 0.074mm
50The mixture 2% of=5 μ m alumina powders; Wherein, granularity is＜metallic aluminium powder and the d of 0.074mm
50The mass ratio 1:2 of the mixture of=5 μ m alumina powders.
The specification of friction press can be: the friction press of 630 tons, 800 tons or 1000 tons.
The preparation method of embodiment 2 and embodiment 3 is identical with embodiment 1.
Claims (5)
1. refining ladle Bao Biyong alumina-magnesia brick, it is characterized in that: the chemical composition of raw material and granularity are by mass percentage:
Palm fibre corundum: 8-3mm, 25-35%, 3-1mm, 20-35%;
Spinel: 1-0.088mm, 5-20%;
Sub-white corundum:＜0.088mm, 15--25%;
Magnesia powder:＜0.088mm, 1--7%;
Additive: 0.5--3%.
2. a kind of refining ladle Bao Biyong alumina-magnesia brick according to claim 1, it is characterized in that: described additive is the mixture of metallic aluminium powder and alumina powder.
3. a kind of refining ladle Bao Biyong alumina-magnesia brick according to claim 2, it is characterized in that: the mass ratio of described metallic aluminium powder and alumina powder mixture is: 1:1.5 ~ 3.0.
4. a kind of refining ladle Bao Biyong alumina-magnesia brick according to claim 3, it is characterized in that: the granularity of described metallic aluminium powder is:＜0.074mm, alumina powder are d
50=5 μ m).
5. method of making refining ladle Bao Biyong alumina-magnesia brick as claimed in claim 1, its feature is as follows:
(a), powder premix: powder is prepared burden according to above-mentioned mass percent, require permissible error ± 1% during batching, all powders premix 10 ~ 15 minutes in sand mill is stand-by;
(b) batch mixing:
Particulate material is prepared burden according to described mass percent, require permissible error ± 1% during batching, put in people's sand mill mixed after 2-5 minute, add wedding agent resol according to described refining ladle wall with 3～3.5% of the raw materials used total mass of alumina-magnesia brick, mixed 5-8 minute, again the mixed powder that makes in the step (a) is put into sand mill and mixed with particulate material 15-20 minute, make the pug discharging, pug requires not have siccative, do not have walk;
(c), moulding:
The pug that makes in the step (b) is put into the friction press moulding, make adobe;
(d), thermal treatment
Behind the adobe seasoning 24h with compression moulding in the step (c), push dry kiln and heat-treat, temperature to heating, wherein is not less than 10h by low 60 ~ 70 ℃ of time of drying, be not less than 12h 110 ~ 120 ℃ of time of drying, be not less than 12h 180-200 ℃ of time of drying;
(e), behind the adobe naturally cooling after the thermal treatment, namely get the finished product of a kind of refining ladle Bao Biyong alumina-magnesia brick of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105787851A CN103044041A (en) | 2012-12-27 | 2012-12-27 | Alumina-magnesia brick for refined steel ladle wall |
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| CN2012105787851A CN103044041A (en) | 2012-12-27 | 2012-12-27 | Alumina-magnesia brick for refined steel ladle wall |
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| CN103044041A true CN103044041A (en) | 2013-04-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496493A (en) * | 2014-10-10 | 2015-04-08 | 长兴正发热电耐火材料有限公司 | High temperature-resistant composite magnesia-alumina unburned brick and preparation method thereof |
| CN105272316A (en) * | 2015-11-17 | 2016-01-27 | 攀枝花钢城集团协力有限公司 | Spinel ladle brick and preparation method thereof |
| CN105503206A (en) * | 2014-09-24 | 2016-04-20 | 上海宝钢工业技术服务有限公司 | Carbon-free refined steel ladle base brick thermal-state repair material and preparation method thereof |
| CN107324784A (en) * | 2017-07-14 | 2017-11-07 | 安徽鑫海环保新材料股份有限公司 | A kind of converter slag-resisting magnalium carbon slide brick and preparation method thereof |
| CN108911767A (en) * | 2018-07-27 | 2018-11-30 | 通达耐火技术股份有限公司 | A kind of RH refining furnace key position corundum system unburned brick and preparation method thereof |
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| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
| CN102452836A (en) * | 2010-10-28 | 2012-05-16 | 宝山钢铁股份有限公司 | Cement-free aluminum-magnesium castable for rapidly baking ladle |
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
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2012
- 2012-12-27 CN CN2012105787851A patent/CN103044041A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
| CN102452836A (en) * | 2010-10-28 | 2012-05-16 | 宝山钢铁股份有限公司 | Cement-free aluminum-magnesium castable for rapidly baking ladle |
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503206A (en) * | 2014-09-24 | 2016-04-20 | 上海宝钢工业技术服务有限公司 | Carbon-free refined steel ladle base brick thermal-state repair material and preparation method thereof |
| CN105503206B (en) * | 2014-09-24 | 2020-05-22 | 上海宝钢工业技术服务有限公司 | Thermal-state repairing material for carbon-free refined ladle base brick and preparation method thereof |
| CN104496493A (en) * | 2014-10-10 | 2015-04-08 | 长兴正发热电耐火材料有限公司 | High temperature-resistant composite magnesia-alumina unburned brick and preparation method thereof |
| CN104496493B (en) * | 2014-10-10 | 2016-02-17 | 长兴正发热电耐火材料有限公司 | A kind of high temp durable composite aluminum magnesium green brick and preparation method thereof |
| CN105272316A (en) * | 2015-11-17 | 2016-01-27 | 攀枝花钢城集团协力有限公司 | Spinel ladle brick and preparation method thereof |
| CN107324784A (en) * | 2017-07-14 | 2017-11-07 | 安徽鑫海环保新材料股份有限公司 | A kind of converter slag-resisting magnalium carbon slide brick and preparation method thereof |
| CN108911767A (en) * | 2018-07-27 | 2018-11-30 | 通达耐火技术股份有限公司 | A kind of RH refining furnace key position corundum system unburned brick and preparation method thereof |
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Application publication date: 20130417 |