CN102351548A - Unburned magnesium-calcium-carbon brick and preparation method thereof - Google Patents
Unburned magnesium-calcium-carbon brick and preparation method thereof Download PDFInfo
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- CN102351548A CN102351548A CN2011101927567A CN201110192756A CN102351548A CN 102351548 A CN102351548 A CN 102351548A CN 2011101927567 A CN2011101927567 A CN 2011101927567A CN 201110192756 A CN201110192756 A CN 201110192756A CN 102351548 A CN102351548 A CN 102351548A
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Abstract
The invention discloses an unburned magnesium-calcium-carbon brick and a preparation method thereof. The unburned magnesium-calcium-carbon brick comprises 9-16 wt% of MgO-CaO clinker with the particle size of 5-7 mm, 9-16 wt% of MgO-CaO clinker with the particle size of 3-5 mm, 9-16 wt% of MgO-CaO clinker with the particle size of 1-3 mm, 13-32 wt% of MgO-CaO clinker with the particle size of 0.5-1 mm, 5-25 wt% of fused magnesia with the particle size of no larger than 0.5 mm, 2-5 wt% of modified asphalt bonding agent, 3-5 wt% of flake graphite, and 2-5 wt% of metal magnesium powder additive. The preparation method comprises the following steps: according to the raw material, carrying out combination of the formula, preparing materials, mixing, molding, sintering, and waxing, and then carrying out vacuum aluminum foil packaging. The unburned magnesium-calcium-carbon brick has high hydration resistance property, high slag resistance property because of high purity, and better thermal shock resistance than other like products. Simultaneously, the method has the advantages of simple process and low cost. The brick contains free CaO, so that the brick has excellent performance of purifying molten steel, and is very suitable for preparing stainless steel and other high cleaness steel.
Description
Technical field
The present invention relates to fire resisting material field, particularly a kind of unfired magnesia-calcium carbon brick and preparation method.
Background technology
The ladle of the smelting usefulness of present domestic stainless steel and special steel is a waterless resin with the most of wedding agent that adopts of one of refractory materials magnesia-calcium-carbon brick; Because the price of waterless resin in the market is very high; Production cost is also higher relatively; And compare with like product (common magnesia carbon brick) its work-ing life and do not have much raisings, so its cost performance is on the low side.
Summary of the invention
The present invention is directed to the technical problem that exists in the above-mentioned prior art, provide that a kind of cost is low, the unfired magnesia-calcium carbon brick of long service life and preparation method thereof.
Technical scheme of the present invention is achieved in that
A kind of unfired magnesia-calcium carbon brick is characterized in that by following raw materials by weight formulated:
The calcium magnesia sand 9-16% of 5-7mm, the calcium magnesia sand 9-16% of 3-5mm,
The calcium magnesia sand 9-16% of 1-3mm, the calcium magnesia sand 13-32% of 0.5-1mm,
The electrosmelted magnesite clinker 5-25% of≤0.5mm, wedding agent modifying asphalt 2-5%,
Crystalline flake graphite 3-5%, additive metal magnesium powder 2-5%.
A kind of preparation method of unfired magnesia-calcium carbon brick comprises the steps:
(1); Calcium magnesia sand is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively; Send into ball mill again and carry out fine grinding, after the screen cloth screening, processing granularity is the calcium magnesia sand of 5-7mm, 3-5mm, 1-3mm, four kinds of specifications of 0.5-1mm; Electrosmelted magnesite clinker is processed≤the electrosmelted magnesite clinker fine powder of 0.5mm through ball mill;
(2); Weight percent is on request prepared burden, and in the material for preparing is sent into the high speed mixing roll, mixes, and its order of addition(of ingredients) is the calcium magnesia sand of 5-7mm; The calcium magnesia sand of 3-5mm; The calcium magnesia sand of 1-3mm, the calcium magnesia sand of 0.5-1mm adds the modifying asphalt wedding agent then; Then add crystalline flake graphite; Be afterwards≤the electrosmelted magnesite clinker fine powder of 0.5mm, add additive metal magnesium powder at last again, the total time of batch mixing is no less than 25 minutes;
(3), the material that mixes is added in the mould, carry out extrusion forming;
(4), the blank of moulding is sent in the tunnel furnace, carried out high temperature and burn till;
(5), behind the blank kiln discharge, carry out waxdip immediately and handle, vacuumize with aluminium foil then and pack.
Adopted the advantage of the present invention of technique scheme to be:
The present invention is through the treatment process of rational batching and science; This unfired magnesia-calcium carbon brick volume density of preparation is big; Intensity is high, and is difficult for aquation, cracking, and corrosion resistance is strong; High-temperature stability is good; Hang slag during use easily and be not prone to peeling phenomenon, high life can be applicable in the ladle of high tensile steels such as stainless steel, special steel; Severe cruelization that can adapt to its operational condition is such as refining temperature rising, the increase of VD processing rate, the prolongation of high vacuum hold-time etc.
The modifying asphalt that the present invention relates to combines the unfired magnesia-calcium carbon brick; Used wedding agent is a modifying asphalt, and is cheap, can be used in the ladle refractory materials of stainless steel and special steel; The work-ing life of this product, cost performance obviously improved than the high 5-10% of resin-bonded magnesia-calcium-carbon brick.
Embodiment
The specific embodiment of the present invention is following:
Embodiment: produce 100 tons of unfired magnesia-calcium carbon bricks
1. at first confirm production formula, promptly various raw-material ratios.Prescription is: calcium magnesia sand 7-5mm 10%, 5-3mm 15%, 3-1mm 24%, 1-0.5mm 20%; 98 electrosmelted magnesite clinkers≤0.5mm 22%; Modifying asphalt wedding agent 3%; 97 crystalline flake graphites 4%; Metal magnesium powder additive 2%.
Consumption according to calculating each raw material is: 10 tons of calcium magnesia sand 7-5mm, 15 tons of 5-3mm, 24 tons of 3-1mm, 20 tons of 1-0.5mm; 22 tons of electrosmelted magnesite clinker≤0.5mm; 3 tons of modifying asphalt wedding agents; 4 tons of 97 crystalline flake graphites; 2 tons of metal magnesium powder additives.
2. prepare burden and batch mixing.According to above-mentioned production formula, to prepare burden, the gross weight of each batching is 1000kg, concrete batching is: calcium magnesia sand 7-5mm 100kg, 5-3mm 150kg, 3-1mm240kg, 1-0.5mm 200kg; 98 electrosmelted magnesite clinkers≤0.5mm 220kg; Modifying asphalt wedding agent 30kg; 97 crystalline flake graphite 40kg; Metal magnesium powder additive 20kg.
Then confected materials is sequentially added into and carries out batch mixing in the muller.Order of addition(of ingredients) is: the calcium magnesia sand particulate material of the calcium magnesia sand particulate material of 7-5mm, the calcium magnesia sand particulate material of 5-3mm, 3-1mm, calcium magnesia sand particulate material → modifying asphalt wedding agent → 97 crystalline flake graphites of 1-0.5mm →≤the 98 electrosmelted magnesite clinker fine powders of 0.5mm, metal magnesium powder.Mixing time is no less than 25min.
3. moulding.Mixed pug is transported to the fitting room carries out moulding, the time of midfeather can not surpass 30min.After pouring into pug in the mould, need be flat the pug strip.The pressurization dynamics adopts the heavy principle in light earlier back to carry out during moulding.
4. burn till.After treating that the green compact inspection of semifinished product is qualified, get into closed roasting kiln and toast, storing temperature is controlled at 200-230 ℃, and soaking time is at 8-10h, and total storing time is no less than 30h at once.Baking process is the crucial CONTROL PROCESS of unfired magnesia-calcium carbon brick, when baking, must guarantee the kiln inner drying, does not have water vapour, to prevent the aquation of adobe.
5. check and packing.For preventing aquation, product goes out after the roasting kiln, should test immediately and carry out the waxdip processing then.Packing adopts aluminium foil to carry out vacuum packaging.
6. the physics and chemistry of the unfired magnesia-calcium carbon brick of this instance detection index is: MgO 74.34%, and CaO 23.70%, void content 2.8%, volume density 2.93g/cm
3
Claims (2)
1. unfired magnesia-calcium carbon brick is characterized in that by following raw materials by weight formulated:
The calcium magnesia sand 9-16% of 5-7mm, the calcium magnesia sand 9-16% of 3-5mm,
The calcium magnesia sand 9-16% of 1-3mm, the calcium magnesia sand 13-32% of 0.5-1mm,
The electrosmelted magnesite clinker 5-25% of≤0.5mm, wedding agent modifying asphalt 2-5%,
Crystalline flake graphite 3-5%, additive metal magnesium powder 2-5%.
2. the preparation method of a unfired magnesia-calcium carbon brick is characterized in that comprising the steps:
(1); Calcium magnesia sand is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher successively; Send into ball mill again and carry out fine grinding, after the screen cloth screening, processing granularity is the calcium magnesia sand of 5-7mm, 3-5mm, 1-3mm, four kinds of specifications of 0.5-1mm; Electrosmelted magnesite clinker is processed≤the electrosmelted magnesite clinker fine powder of 0.5mm through ball mill;
(2); Weight percent is on request prepared burden, and in the material for preparing is sent into the high speed mixing roll, mixes, and its order of addition(of ingredients) is the calcium magnesia sand of 5-7mm; The calcium magnesia sand of 3-5mm; The calcium magnesia sand of 1-3mm, the calcium magnesia sand of 0.5-1mm adds the modifying asphalt wedding agent then; Then add crystalline flake graphite; Be afterwards≤the electrosmelted magnesite clinker fine powder of 0.5mm, add additive metal magnesium powder at last again, the total time of batch mixing is no less than 25 minutes;
(3), the material that mixes is added in the mould, carry out extrusion forming;
(4), the blank of moulding is sent in the tunnel furnace, carried out high temperature and burn till;
(5), behind the blank kiln discharge, carry out waxdip immediately and handle, vacuumize with aluminium foil then and pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101927567A CN102351548A (en) | 2011-07-11 | 2011-07-11 | Unburned magnesium-calcium-carbon brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101927567A CN102351548A (en) | 2011-07-11 | 2011-07-11 | Unburned magnesium-calcium-carbon brick and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531677A (en) * | 2012-02-24 | 2012-07-04 | 辽宁科技大学 | Waterproof method for unburned magnesium calcium carbon brick |
| CN102659434A (en) * | 2012-05-18 | 2012-09-12 | 贵阳明通炉料有限公司 | Hydration-resistance sintered magnesia calcium brick |
| CN103332941A (en) * | 2013-07-11 | 2013-10-02 | 营口和隆耐火材料有限公司 | Asphalt combined magnesia-carbon brick and production method thereof |
| CN105036769A (en) * | 2015-07-09 | 2015-11-11 | 长兴泓矿炉料有限公司 | Antioxidant magnesium-calcium-carbon refractory material and preparation method therefor |
| CN106518106A (en) * | 2016-10-18 | 2017-03-22 | 山西禄纬堡太钢耐火材料有限公司 | Raw material proportioning and manufacturing method for unfired magnesia-calcium carbon brick |
| CN106866118A (en) * | 2017-03-27 | 2017-06-20 | 孙光 | One kind does not burn high-purity magnesia-calcium brick and preparation method thereof |
| CN107244923A (en) * | 2016-11-30 | 2017-10-13 | 辽宁科技大学 | It is a kind of to increase the method for unfired magnesia-calcium brick medium temperature intensity |
| CN113354426A (en) * | 2021-07-06 | 2021-09-07 | 山西禄纬堡太钢耐火材料有限公司 | Baking-free magnesia-calcium-carbon brick and preparation method thereof |
| CN114149251A (en) * | 2021-12-16 | 2022-03-08 | 江苏鑫驰新材料有限公司 | Unburned magnesium-calcium brick for AOD furnace and preparation method thereof |
| CN114149250A (en) * | 2021-12-16 | 2022-03-08 | 江苏鑫驰新材料有限公司 | Non-baking environment-friendly magnesia-calcium brick and preparation method thereof |
| CN116354702A (en) * | 2023-03-31 | 2023-06-30 | 海城利尔麦格西塔材料有限公司 | Production method of anti-stripping unburned magnesia-calcium-carbon brick |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1093691A (en) * | 1993-04-14 | 1994-10-19 | 冶金工业部鞍山热能研究院 | Anhydrous binder for refractory material |
| CN101921125A (en) * | 2010-08-20 | 2010-12-22 | 浙江金磊高温材料股份有限公司 | Unfired magnesia-calcium brick and preparation method thereof |
-
2011
- 2011-07-11 CN CN2011101927567A patent/CN102351548A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093691A (en) * | 1993-04-14 | 1994-10-19 | 冶金工业部鞍山热能研究院 | Anhydrous binder for refractory material |
| CN101921125A (en) * | 2010-08-20 | 2010-12-22 | 浙江金磊高温材料股份有限公司 | Unfired magnesia-calcium brick and preparation method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531677A (en) * | 2012-02-24 | 2012-07-04 | 辽宁科技大学 | Waterproof method for unburned magnesium calcium carbon brick |
| CN102659434A (en) * | 2012-05-18 | 2012-09-12 | 贵阳明通炉料有限公司 | Hydration-resistance sintered magnesia calcium brick |
| CN103332941A (en) * | 2013-07-11 | 2013-10-02 | 营口和隆耐火材料有限公司 | Asphalt combined magnesia-carbon brick and production method thereof |
| CN103332941B (en) * | 2013-07-11 | 2015-04-15 | 营口和隆耐火材料有限公司 | Asphalt combined magnesia-carbon brick and production method thereof |
| CN105036769A (en) * | 2015-07-09 | 2015-11-11 | 长兴泓矿炉料有限公司 | Antioxidant magnesium-calcium-carbon refractory material and preparation method therefor |
| CN106518106A (en) * | 2016-10-18 | 2017-03-22 | 山西禄纬堡太钢耐火材料有限公司 | Raw material proportioning and manufacturing method for unfired magnesia-calcium carbon brick |
| CN107244923A (en) * | 2016-11-30 | 2017-10-13 | 辽宁科技大学 | It is a kind of to increase the method for unfired magnesia-calcium brick medium temperature intensity |
| CN106866118A (en) * | 2017-03-27 | 2017-06-20 | 孙光 | One kind does not burn high-purity magnesia-calcium brick and preparation method thereof |
| CN113354426A (en) * | 2021-07-06 | 2021-09-07 | 山西禄纬堡太钢耐火材料有限公司 | Baking-free magnesia-calcium-carbon brick and preparation method thereof |
| CN114149251A (en) * | 2021-12-16 | 2022-03-08 | 江苏鑫驰新材料有限公司 | Unburned magnesium-calcium brick for AOD furnace and preparation method thereof |
| CN114149250A (en) * | 2021-12-16 | 2022-03-08 | 江苏鑫驰新材料有限公司 | Non-baking environment-friendly magnesia-calcium brick and preparation method thereof |
| CN116354702A (en) * | 2023-03-31 | 2023-06-30 | 海城利尔麦格西塔材料有限公司 | Production method of anti-stripping unburned magnesia-calcium-carbon brick |
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Application publication date: 20120215 |
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