CN101462883A - Low-intensity magnesium brick and production method thereof - Google Patents
Low-intensity magnesium brick and production method thereof Download PDFInfo
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- CN101462883A CN101462883A CNA2008101909459A CN200810190945A CN101462883A CN 101462883 A CN101462883 A CN 101462883A CN A2008101909459 A CNA2008101909459 A CN A2008101909459A CN 200810190945 A CN200810190945 A CN 200810190945A CN 101462883 A CN101462883 A CN 101462883A
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Abstract
The invention relates to a low-strength magnesite brick and a production method thereof. The brick is made from the following materials by weight: 90-99 parts of medium magnesia containing not less than 95% MgO, 1-10 parts of high-purity light burned magnesia containing not less than 97% MgO, and 3 parts of pulp. A finished product is finally made by batching at the proportions, mixing, forming, drying, burning, sorting and the like. The low-strength magnesite brick has lower compression strength, easy cutting, lower bulk density, higher macro porosity and good insulating property, which effectively lowers heat loss of a kiln.
Description
Technical field
The present invention relates to a kind of low-intensity magnesium brick and production method thereof.
Background technology
Produce by national standard now that the intensity of middle-grade magnesium brick (MZ-95B) is all very high usually (all to adopt MgO 〉=95% or 94.5% middle-grade magnesia to burn till, MgO 〉=94.5%, compressive strength 〉=60MPa, 0.2MPa refractoriness under load T0.6 〉=1650 ℃, volume density 〉=2.96g/cm3, apparent porosity≤18%), and the converter permanent liner generally all adopts the middle-grade magnesium brick of this kind to build by laying bricks or stones, very difficulty is (time-consuming when the every cyclization tweel block of cutting, take, take saw blade, take manpower), and because the higher apparent porosity of volume density is lower, heat-insulating property is not good enough, causes the kiln heat-energy losses.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of low-intensity magnesium brick and production method thereof are provided.The low-intensity magnesium brick compressive strength of producing according to the inventive method is lower, is easy to cutting, save time, power saving, province's saw blade, human-saving), volume density is lower, and apparent porosity is higher, and heat-insulating property is better, has reduced the kiln heat-energy losses.
In order to address the above problem, the present invention by the following technical solutions:
A kind of low-intensity magnesium brick, it by following raw material by weight ratio make:
90～99 parts in the middle-grade magnesia of MgO 〉=95%
1～10 part of the high-purity light calcined magnesia of MgO 〉=97%
3 parts of paper pulp.
The grain size distribution of the middle-grade magnesia of described MgO 〉=95% is, by weight ratio:
3-5mm 20-40 part
1-3mm 20-30 part
0.088-1mm 25-35 part
Granularity is that the middle-grade magnesia of MgO 〉=95% of 0-0.088mm and the add-on sum of MgO 〉=97% high-purity light calcined magnesia that granularity is 0-0.088mm are 20-30 part, and wherein granularity is add-on 1-10 part of MgO 〉=97% high-purity light calcined magnesia of 0-0.088mm.
The production method of described low-intensity magnesium brick, at first with middle-grade magnesia fragmentation, screening, fine grinding, high-purity light calcined magnesia fine grinding is become powder, prepare burden, batch mixing, moulding, drying, burn till, choose according to above-mentioned weight part ratio, these method concrete steps are as follows:
1) raw material pulverizing screening fine grinding; By described grain size distribution raw material is ground, sieves into desired particle size;
2) prepare burden, mix; Raw material after the screening is prepared burden, mixed according to above-mentioned weight part ratio;
3) moulding; Pug after batching mixed joins extrusion forming in the friction press mould;
4) drying; In temperature is dry in 100～140 ℃ the tunnel furnace moisture eliminator, time 10-16 hour, requires moisture content in the base substrate≤0.5%;
5) burn till; Dried adobe delivered in the calcining kiln burn till 1600 ℃～1650 ℃ of firing temperatures, firing time 100-300 minute;
6) selection; To the finished product selection, permissible variation in dimension and outward appearance selection are according to the national standard of magnesia brick.
7) performance index; The performance index of low-intensity magnesium brick require as follows: MgO 〉=94.5%; Compressive strength 25～45MPa; 0.2MPa refractoriness under load T
0.6〉=1650 ℃; Volume density 〉=2.8g/cm
3Apparent porosity 20～25%.
The described the 2nd) in the step, batching is in proper order: the order according to 3-5mm, 1-3mm, 0.088mm-1mm adds middle-grade magnesia successively, mixes 2-4 minute; Add paper pulp again, wet mixing 3-5 minute, adding granularity again was the middle-grade magnesia that contains MgO 〉=95% of 0-0.088mm and the high-purity light calcined magnesia fine powder of MgO 〉=97% that granularity is 0-0.088mm, mixes discharging, moulding 5-15 minute.
Compared with prior art, the invention has the beneficial effects as follows:
1, the low-intensity magnesium brick compressive strength is lower, is easy to cutting, thereby has reduced labor intensity of operating personnel, has improved working efficiency.
2, the low-intensity magnesium brick volume density is lower, and apparent porosity is higher, and heat-insulating property is better, has reduced the kiln heat-energy losses.
Embodiment
Embodiment 1
A kind of low-intensity magnesium brick, it by following raw material by weight ratio make:
95 parts in the middle-grade magnesia of MgO 〉=95%
5 parts of the high-purity light calcined magnesias of MgO 〉=97%
3 parts of paper pulp.
The grain size distribution of the middle-grade magnesia of described MgO 〉=95% is that each granularity is prepared in following weight part ratio:
30 parts of 3-5mm
25 parts of 1-3mm
0.088-1mm 30 parts
Granularity is that the middle-grade magnesia of MgO 〉=95% of 0-0.088mm and the add-on sum of MgO 〉=97% high-purity light calcined magnesia that granularity is 0-0.088mm are 25 parts, and wherein granularity is 5 parts of the add-ons of MgO 〉=97% high-purity light calcined magnesia of 0-0.088mm.
The production method of described low-intensity magnesium brick is:
At first with middle-grade magnesia fragmentation, screening, fine grinding, high-purity light calcined magnesia fine grinding is become powder, prepare burden, batch mixing, moulding, drying, burn till, choose according to above-mentioned weight part ratio, concrete steps are as follows:
1) raw material pulverizing screening fine grinding; The middle-grade magnesia of MgO 〉=95% is broken in crusher; Make respectively 3～5mm, 1～3mm and＜three kinds of particles of 1mm, and extract wherein that the part clout becomes≤the 0.088mm fine powder with the Raymond machine fine grinding out.
With high-purity light calcined magnesia Raymond machine fine grinding one-tenth≤0.088mm fine powder.
Granularity requirements: granularity material upper and lower limit tails over≤and 5%.
2) prepare burden, mix; Raw material after the screening is prepared burden, mixed according to above-mentioned weight part ratio; Order according to 3-5mm, 1-3mm, 0.088mm-1mm adds middle-grade magnesia successively, mixes 2-4 minute; Add paper pulp again, wet mixing 3-5 minute, add the middle-grade magnesia of the MgO that granularity is 0-0.088mm 〉=95% and the high-purity light calcined magnesia fine powder of MgO 〉=97% that granularity is 0-0.088mm again, mixed discharging 5-15 minute;
3) moulding; Pug after batching mixed joins extrusion forming in the friction press mould;
4) drying; In temperature is dry in 100～140 ℃ the tunnel furnace moisture eliminator, time 10-16 hour, requires moisture content in the base substrate≤0.5%;
5) burn till; Dried adobe delivered in the calcining kiln burn till 1600 ℃～1650 ℃ of firing temperatures, firing time 100-300 minute;
6) selection; To the finished product selection, permissible variation in dimension and outward appearance selection are according to the national standard of magnesia brick.
7) performance index; The performance index of low-intensity magnesium brick require as follows: MgO 〉=94.5%; Compressive strength 25～45MPa; 0.2MPa refractoriness under load T
0.6〉=1650 ℃; Volume density 〉=2.8g/cm
3Apparent porosity 20～25%.
Embodiment 2
A kind of low-intensity magnesium brick, it by following raw material by weight ratio make:
90 parts in the middle-grade magnesia of MgO 〉=95%
10 parts of the high-purity light calcined magnesias of MgO 〉=97%
3 parts of paper pulp.
The grain size distribution of the middle-grade magnesia of described MgO 〉=95% is, by weight ratio:
20 parts of 3-5mm
30 parts of 1-3mm
0.088-1mm 25 parts
Granularity is that the middle-grade magnesia of MgO 〉=95% of 0-0.088mm and the add-on sum of MgO 〉=97% high-purity light calcined magnesia that granularity is 0-0.088mm are 20 parts, and wherein granularity is 1 part of the add-on of MgO 〉=97% high-purity light calcined magnesia of 0-0.088mm.
The production method of described low-intensity magnesium brick is with embodiment 1.
Embodiment 3
A kind of low-intensity magnesium brick, it by following raw material by weight ratio make:
99 parts in the middle-grade magnesia of MgO 〉=95%
1 part of the high-purity light calcined magnesia of MgO 〉=97%
3 parts of paper pulp.
The grain size distribution of the middle-grade magnesia of described MgO 〉=95% is, by weight ratio:
40 parts of 3-5mm
20 parts of 1-3mm
0.088-1mm 35 parts
Granularity is that the middle-grade magnesia of MgO 〉=95% of 0-0.088mm and the add-on sum of MgO 〉=97% high-purity light calcined magnesia that granularity is 0-0.088mm are 30 parts, and wherein granularity is 10 parts of the add-ons of MgO 〉=97% high-purity light calcined magnesia of 0-0.088mm.
The production method of described low-intensity magnesium brick is with embodiment 1.
Claims (4)
1, a kind of low-intensity magnesium brick is characterized in that, it by following raw material by weight ratio make:
90～99 parts in the middle-grade magnesia of MgO 〉=95%
1～10 part of the high-purity light calcined magnesia of MgO 〉=97%
3 parts of paper pulp.
2, a kind of low-intensity magnesium brick according to claim 1 is characterized in that, the grain size distribution of the middle-grade magnesia of described MgO 〉=95% is, by weight ratio:
3-5mm 20-40 part
1-3mm 20-30 part
0.088-1mm 25-35 part
Granularity is that the middle-grade magnesia of MgO 〉=95% of 0-0.088mm and the add-on sum of MgO 〉=97% high-purity light calcined magnesia that granularity is 0-0.088mm are 20-30 part, and wherein granularity is add-on 1-10 part of MgO 〉=97% high-purity light calcined magnesia of 0-0.088mm.
3, the production method of claim 1 or 2 described low-intensity magnesium bricks, it is characterized in that, at first with middle-grade magnesia fragmentation, screening, fine grinding, high-purity light calcined magnesia fine grinding is become powder, prepare burden, batch mixing, moulding, drying, burn till, choose according to above-mentioned weight part ratio, these method concrete steps are as follows:
1) raw material pulverizing screening fine grinding; By described grain size distribution raw material is ground, sieves into desired particle size;
2) prepare burden, mix; Raw material after the screening is prepared burden, mixed according to above-mentioned weight part ratio;
3) moulding; Pug after batching mixed joins extrusion forming in the friction press mould;
4) drying; In temperature is dry in 100～140 ℃ the tunnel furnace moisture eliminator, time 10-16 hour, requires moisture content in the base substrate≤0.5%;
5) burn till; Dried adobe delivered in the calcining kiln burn till 1600 ℃～1650 ℃ of firing temperatures, firing time 100-300 minute;
6) selection; To the finished product selection, permissible variation in dimension and outward appearance selection are according to the national standard of magnesia brick.
7) performance index; The performance index of low-intensity magnesium brick require as follows: MgO 〉=94.5%; Compressive strength 25～45MPa; 0.2MPa refractoriness under load T
0.6〉=1650 ℃; Volume density 〉=2.8g/cm
3Apparent porosity 20～25%.
4, the production method of low-intensity magnesium brick according to claim 3 is characterized in that, described batching is in proper order: the order according to 3-5mm, 1-3mm, 0.088mm-1mm adds middle-grade magnesia successively, mixes 2-4 minute; Add paper pulp again, wet mixing 3-5 minute, add the middle-grade magnesia of the MgO that granularity is 0-0.088mm 〉=95% and the high-purity light calcined magnesia fine powder of MgO 〉=97% that granularity is 0-0.088mm again, mixed discharging, moulding 5-15 minute.
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| CN2008101909459A CN101462883B (en) | 2008-12-31 | 2008-12-31 | Low-intensity magnesium brick and production method thereof |
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| CN2008101909459A CN101462883B (en) | 2008-12-31 | 2008-12-31 | Low-intensity magnesium brick and production method thereof |
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| CN101462883A true CN101462883A (en) | 2009-06-24 |
| CN101462883B CN101462883B (en) | 2011-09-28 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372489A (en) * | 2011-08-05 | 2012-03-14 | 海城市中兴高档镁质砖有限公司 | Production method of waterproof magnesite brick |
| CN101708987B (en) * | 2009-11-23 | 2012-05-23 | 海城市中兴高档镁质砖有限公司 | Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof |
| CN104961485A (en) * | 2015-06-26 | 2015-10-07 | 海城市中兴高档镁质砖有限公司 | Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof |
| CN109020602A (en) * | 2018-08-27 | 2018-12-18 | 海城利尔麦格西塔材料有限公司 | A kind of hydration-resisting magnesia brick and its production method |
| CN113045292A (en) * | 2021-03-22 | 2021-06-29 | 河北北方窑业工程有限公司 | High-purity magnesia brick for ultra-high temperature shaft kiln at temperature of more than or equal to 2100 ℃ and manufacturing method thereof |
| CN114249580A (en) * | 2022-01-17 | 2022-03-29 | 大石桥市中建镁砖有限公司 | High-performance magnesia brick for glass kiln and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100372808C (en) * | 2006-04-18 | 2008-03-05 | 中国建筑材料科学研究院大石桥镁砖厂 | Making process of zirconium-containing magnesia brick |
| CN100540508C (en) * | 2007-11-07 | 2009-09-16 | 郑州华威耐火材料股份有限公司 | Magnesia chrome brick |
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2008
- 2008-12-31 CN CN2008101909459A patent/CN101462883B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708987B (en) * | 2009-11-23 | 2012-05-23 | 海城市中兴高档镁质砖有限公司 | Compound advanced magnesia-chromite brick for RH dip pipes and production method thereof |
| CN102372489A (en) * | 2011-08-05 | 2012-03-14 | 海城市中兴高档镁质砖有限公司 | Production method of waterproof magnesite brick |
| CN104961485A (en) * | 2015-06-26 | 2015-10-07 | 海城市中兴高档镁质砖有限公司 | Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof |
| CN104961485B (en) * | 2015-06-26 | 2017-03-22 | 海城市中兴高档镁质砖有限公司 | Magnesium spinel refractory material high in thermal shock resistance and manufacturing method thereof |
| CN109020602A (en) * | 2018-08-27 | 2018-12-18 | 海城利尔麦格西塔材料有限公司 | A kind of hydration-resisting magnesia brick and its production method |
| CN113045292A (en) * | 2021-03-22 | 2021-06-29 | 河北北方窑业工程有限公司 | High-purity magnesia brick for ultra-high temperature shaft kiln at temperature of more than or equal to 2100 ℃ and manufacturing method thereof |
| CN114249580A (en) * | 2022-01-17 | 2022-03-29 | 大石桥市中建镁砖有限公司 | High-performance magnesia brick for glass kiln and preparation method thereof |
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| CN101462883B (en) | 2011-09-28 |
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Inventor after: Wang Xiangfeng Inventor after: Wang Sheng Inventor before: Wang Xiangfeng Inventor before: Wang Sheng Inventor before: Hou Ze |
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Free format text: CORRECT: INVENTOR; FROM: WANG XIANGFENG WANG SHENG HOU ZE TO: WANG XIANGFENG WANG SHENG |
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Address after: 114206 Liaoning City, Anshan Province, Haicheng City, the town of Wang Village, the village of eight Patentee after: Haicheng Lear MEG Materials Co. Ltd. Sita Address before: 114200 Wang Jia village, eight Li Town, Haicheng City, Liaoning Province Patentee before: Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. |
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