CN103771880A - Magnesium-chromium-zirconium composite brick - Google Patents
Magnesium-chromium-zirconium composite brick Download PDFInfo
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Abstract
The invention belongs to the field of refractory materials, and particularly relates to a magnesium-chromium-zirconium composite brick. The magnesium-chromium-zirconium composite brick is produced by adopting the following materials: 30-50% of electrically-fused magnesium-chromium sand with the granularity of 3-5mm, 10-20% of electrically-fused magnesium-chromium sand with the granularity of less than 3mm, 10-30% of South Africa chromium concentrate with the granularity of not greater than 2mm, 5-15% of sintered magnesium sand powder with the granularity of not greater than 0.088mm, and 2-5% of an organic-inorganic compound binding agent. The magnesium-chromium-zirconium composite brick is produced by the following steps: mixing the materials except the organic-inorganic compound binding agent, then adding the organic-inorganic compound binding agent, carrying out mulling, pressing, drying, sintering to obtain a sintered brick, carrying out pressurized permeation on the sintered brick in a zirconium oxychloride solution, and drying. The magnesium-chromium-zirconium composite brick has the slagging resistance and the permeation prevention property of conventional magnesium-chromium refractory materials, is applicable to the field of refining of steel metallurgy, can remarkably prolong the service life of refining equipment and has good economical and social benefits.
Description
Technical field
The invention belongs to fire resisting material field, be specifically related to a kind of magnesium chromium zirconium composite brick.
Background technology
Magnesium chromium series refractory material has good resistance to fouling, intensity advantages of higher, is widely used in iron and steel and colored metallurgical industrial.Steel Refining equipment, if the vacuum chamber of RH stove and soaking tub are all to use magnesium chromium material to build by laying bricks or stones, nonferrous metallurgical equipment, comprises Flash Smelting Furnace, noranda furnace, Chinese mugwort Sa stove etc., all larger proportions of building by laying bricks or stones of liner use magnesium chromia material.But traditional magnesium chromium material heat-shock resistance is poor, and apparent porosity is higher, and air vent aperture is bigger than normal, in the time that being on active service, key position easily corroded damage by slag and metal liquid.
Summary of the invention
In order further to improve the use properties of magnesia chrome brick, the invention provides a kind of magnesium chromium zirconium composite brick, this product has the resistance to fouling, anti-permeability and the thermal shock resistance that are better than traditional magnesia chrome brick.During for iron and steel and nonferrous smelting equipment, can improve significantly service life of equipment, save and smelt old, obtain good society and economic benefit.
Technical scheme of the present invention is as follows:
A kind of magnesium chromium zirconium composite brick, described magnesium chromium zirconium composite brick is made up of the main raw material of following weight percent: the fused magnesia-chrome 30 ~ 50% of granularity 3 ~ 5mm, the fused magnesia-chrome 10 ~ 20% that granularity is less than 3mm, the South Africa fine chrome mine 10 ~ 30% that granularity is not more than 2mm, magnesite clinker powder 5 ~ 15% and the organic-inorganic combined binder 2 ~ 5% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface, successively mixing raw material is suppressed, is dried, is burnt till again, to burn till rear brick body pressurizes after infiltration in zirconium oxychloride solution, be dried again, obtain magnesium chromium zirconium composite brick.
According to above-mentioned magnesium chromium zirconium composite brick, the preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 200 ~ 250MPa, after pressurize 1 ~ 2min, obtain green compact sample, green compact sample is dry 24 ~ 36h at normal temperatures, in 110 ~ 150 ℃ of dry kilns, be dried again afterwards 24 ~ 36h, last sample burns till in tunnel furnace, firing temperature is 1750 ~ 1800 ℃, and firing period is 120 ~ 130h;
(3) will burn till rear sample and proceed to pressure reaction still, be filled with the zirconium oxychloride solution of concentration 1.5 ~ 3mol/L, under 0.1 ~ 0.2MPa condition, carry out pressure permeation 10 ~ 20min, permeated rear taking-up, in infrared dryer, dry 12 ~ 24h, obtains magnesium chromium zirconium composite brick.
According to above-mentioned magnesium chromium zirconium composite brick, described basic zirconium chloride is at least technical pure level, zirconium hafnium content >=36wt%.
According to above-mentioned magnesium chromium zirconium composite brick, 25 ~ 80 ℃ of described zirconium oxychloride solution concentration 1.5 ~ 3mol/L, temperature.
According to above-mentioned magnesium chromium zirconium composite brick, described organic-inorganic combined binder is lignosulfite-ammonium phosphate composite solution, lignosulfite-magnesium chloride composite solution, lignosulfite-magnesium sulfate composite solution or dextrin-magnesium chloride composite solution.
According to above-mentioned magnesium chromium zirconium composite brick, in described lignosulfite-ammonium phosphate composite solution, both volume ratios are 3:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of ammonium phosphate solution is 1.50 ~ 1.55.
According to above-mentioned magnesium chromium zirconium composite brick, in described lignosulfite-magnesium chloride composite solution, both volume ratios are 1:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
According to above-mentioned magnesium chromium zirconium composite brick, in described lignosulfite-magnesium sulfate composite solution, both volume ratios are 2:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of Adlerika is 1.20 ~ 1.25.
According to above-mentioned magnesium chromium zirconium composite brick, in described dextrin-magnesium chloride composite solution, both volume ratios are 1:1, and wherein, the proportion of dextrin is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
the beneficial effect that product of the present invention has is:
After the present invention burns till traditional electric smelting recombined magnesia-chrome brick, continue pressurization infiltration in zirconium oxychloride solution, pass through process of osmosis, basic zirconium chloride in solution is introduced in the aobvious pore of magnesia chrome brick and microfissure, make magnesium chromium zirconium composite brick, under use temperature, the basic zirconium chloride of introducing apparent pore and microfissure place can decompose generation zirconium white, be filled in magnesia chrome brick apparent pore, reduce apparent porosity, refinement air vent aperture, resistance to fouling and the anti-permeability of goods are improved, simultaneously because zirconic effect has also improved thermal shock resistance etc., thereby develop the magnesium chromium zirconium composite brick of excellent property, during for iron and steel and nonferrous smelting equipment, can improve significantly service life of equipment, save and smelt old, steel industry and nonferrous smelting industry are had to important economic and social benefit.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in more detail, but the invention is not restricted to these embodiment.
embodiment 1
A kind of magnesium chromium zirconium composite brick, is made up of the raw material of following weight percent: the fused magnesia-chrome 30% of granularity 3 ~ 5mm, the fused magnesia-chrome 20% that granularity is less than 3mm, the South Africa fine chrome mine 30% that granularity is not more than 2mm, magnesite clinker powder 15% and the organic-inorganic combined binder 5% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, more successively mixing raw material is suppressed, is dried, is burnt till, will burn till rear brick body and in zirconium oxychloride solution, pressurize after infiltration, be dried again, obtain magnesium chromium zirconium composite brick.Described organic-inorganic combined binder is lignosulfite-ammonium phosphate composite solution, and both volume ratios are 3:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of ammonium phosphate solution is 1.50 ~ 1.55.
The preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 200MPa, after pressurize 1min, obtain green compact sample, green compact sample is dry 24h at normal temperatures, in 110 ℃ of dry kilns, be dried again afterwards 24h, last sample burns till in tunnel furnace, and firing temperature is 1750 ℃, and firing period is 120h;
(3) will burn till rear sample and proceed to pressure reaction still, be filled with concentration 1.5mol/L, temperature and be the zirconium oxychloride solution of 25 ℃, under 0.1MPa, carry out pressure permeation 10min, permeated rear taking-up, in infrared dryer, dry 12h, obtains magnesium chromium zirconium composite brick.
embodiment 2
A kind of magnesium chromium zirconium composite brick, is made up of the raw material of following weight percent: the fused magnesia-chrome 47% of granularity 3 ~ 5mm, the fused magnesia-chrome 20% that granularity is less than 3mm, the South Africa fine chrome mine 18% that granularity is not more than 2mm, magnesite clinker powder 13% and the organic-inorganic combined binder 2% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, more successively mixing raw material is suppressed, is dried, is burnt till, will burn till rear brick body and in zirconium oxychloride solution, pressurize after infiltration, be dried again, obtain magnesium chromium zirconium composite brick.Described organic-inorganic combined binder is lignosulfite-magnesium chloride composite solution, and both volume ratios are 1:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
The preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 230MPa, after pressurize 1.5min, obtain green compact sample, green compact sample is dry 30h at normal temperatures, in 130 ℃ of dry kilns, be dried again afterwards 30h, last sample burns till in tunnel furnace, and firing temperature is 1780 ℃, and firing period is 128h;
(3) will burn till rear sample and proceed to pressure reaction still, and be filled with concentration 2mol/L, temperature and be the zirconium oxychloride solution of 50 ℃, and carry out pressure permeation 15min under 0.2MPa, and permeate rear taking-up, in infrared dryer, dry 18h, obtains magnesium chromium zirconium composite brick.
embodiment 3
A kind of magnesium chromium zirconium composite brick, is made up of the raw material of following weight percent: the fused magnesia-chrome 50% of granularity 3 ~ 5mm, the fused magnesia-chrome 17% that granularity is less than 3mm, the South Africa fine chrome mine 18% that granularity is not more than 2mm, magnesite clinker powder 13% and the organic-inorganic combined binder 2% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, more successively mixing raw material is suppressed, is dried, is burnt till, will burn till rear brick body and in zirconium oxychloride solution, pressurize after infiltration, be dried again, obtain magnesium chromium zirconium composite brick.Described organic-inorganic combined binder is lignosulfite-magnesium sulfate composite solution, and both volume ratios are 2:1, and wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of Adlerika is 1.20 ~ 1.25.
The preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 250MPa, after pressurize 2min, obtain green compact sample, green compact sample is dry 36h at normal temperatures, in 150 ℃ of dry kilns, be dried again afterwards 24h, last sample burns till in tunnel furnace, and firing temperature is 1800 ℃, and firing period is 130h;
(3) will burn till rear sample and proceed to pressure reaction still, and be filled with concentration 3mol/L, temperature and be the zirconium oxychloride solution of 80 ℃, and carry out pressure permeation 20min under 0.2MPa, and permeate rear taking-up, in infrared dryer, dry 24h, obtains magnesium chromium zirconium composite brick.
embodiment 4
A kind of magnesium chromium zirconium composite brick, is made up of the raw material of following weight percent: the fused magnesia-chrome 44% of granularity 3 ~ 5mm, the fused magnesia-chrome 20% that granularity is less than 3mm, the South Africa fine chrome mine 21% that granularity is not more than 2mm, magnesite clinker powder 13% and the organic-inorganic combined binder 2% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, more successively mixing raw material is suppressed, is dried, is burnt till, will burn till rear brick body and in zirconium oxychloride solution, pressurize after infiltration, be dried again, obtain magnesium chromium zirconium composite brick.Described organic-inorganic combined binder is dextrin-magnesium chloride composite solution, and both volume ratios are 1:1, and wherein, the proportion of dextrin is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
The preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 220MPa, after pressurize 1.5min, obtain green compact sample, green compact sample is dry 24h at normal temperatures, in 120 ℃ of dry kilns, be dried again afterwards 36h, last sample burns till in tunnel furnace, and firing temperature is 1750 ℃, and firing period is 120h;
(3) will burn till rear sample and proceed to pressure reaction still, be filled with concentration 2.5mol/L, temperature and be the zirconium oxychloride solution of 60 ℃, under 0.12MPa, carry out pressure permeation 10min, permeated rear taking-up, in infrared dryer, dry 12h, obtains magnesium chromium zirconium composite brick.
The present invention is not limited to above-mentioned embodiment, and those skilled in the art also can make multiple variation accordingly, but scope any and that the present invention is equal to or similarly variation all should be encompassed in the claims in the present invention.
Claims (9)
1. a magnesium chromium zirconium composite brick, is characterized in that: described magnesium chromium zirconium composite brick is made up of the main raw material of following weight percent: the fused magnesia-chrome 30 ~ 50% of granularity 3 ~ 5mm, the fused magnesia-chrome 10 ~ 20% that granularity is less than 3mm, the South Africa fine chrome mine 10 ~ 30% that granularity is not more than 2mm, magnesite clinker powder 5 ~ 15% and the organic-inorganic combined binder 2 ~ 5% that granularity is not more than 0.088mm; After raw material except organic-inorganic combined binder is mixed, add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface, successively mixing raw material is suppressed, is dried, is burnt till again, to burn till rear brick body pressurizes after infiltration in zirconium oxychloride solution, be dried again, obtain magnesium chromium zirconium composite brick.
2. magnesium chromium zirconium composite brick according to claim 1, is characterized in that: the preparation method of described magnesium chromium zirconium composite brick specifically comprises the following steps:
(1) after the raw material except organic-inorganic combined binder is mixed in proportion, then add organic-inorganic combined binder to mix, make bonding agent evenly stick to particle surface;
(2) by mixing raw material compression moulding, under 200 ~ 250MPa, after pressurize 1 ~ 2min, obtain green compact sample, green compact sample is dry 24 ~ 36h at normal temperatures, in 110 ~ 150 ℃ of dry kilns, be dried again afterwards 24 ~ 36h, last sample burns till in tunnel furnace, firing temperature is 1750 ~ 1800 ℃, and firing period is 120 ~ 130h;
(3) will burn till rear sample and proceed to pressure reaction still, be filled with the zirconium oxychloride solution of concentration 1.5 ~ 3mol/L, under 0.1 ~ 0.2MPa condition, carry out pressure permeation 10 ~ 20min, permeated rear taking-up, in infrared dryer, dry 12 ~ 24h, obtains magnesium chromium zirconium composite brick.
3. magnesium chromium zirconium composite brick according to claim 1 and 2, is characterized in that: described basic zirconium chloride is at least technical pure level zirconium hafnium content >=36wt%.
4. magnesium chromium zirconium composite brick according to claim 1 and 2, is characterized in that: 25 ~ 80 ℃ of described zirconium oxychloride solution concentration 1.5-3mol/L, temperature.
5. magnesium chromium zirconium composite brick according to claim 1 and 2, is characterized in that: described organic-inorganic combined binder is lignosulfite-ammonium phosphate composite solution, lignosulfite-magnesium chloride composite solution, lignosulfite-magnesium sulfate composite solution or dextrin-magnesium chloride composite solution.
6. magnesium chromium zirconium composite brick according to claim 5, it is characterized in that: in described lignosulfite-ammonium phosphate composite solution, both volume ratios are 3:1, wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of ammonium phosphate solution is 1.50 ~ 1.55.
7. magnesium chromium zirconium composite brick according to claim 5, it is characterized in that: in described lignosulfite-magnesium chloride composite solution, both volume ratios are 1:1, wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
8. magnesium chromium zirconium composite brick according to claim 5, it is characterized in that: in described lignosulfite-magnesium sulfate composite solution, both volume ratios are 2:1, wherein, the proportion of lignosulfite is 1.20 ~ 1.25, and the proportion of Adlerika is 1.20 ~ 1.25.
9. magnesium chromium zirconium composite brick according to claim 5, is characterized in that: in described dextrin-magnesium chloride composite solution, both volume ratios are 1:1, wherein, the proportion of dextrin is 1.20 ~ 1.25, and the proportion of magnesium chloride solution is 1.18 ~ 1.22.
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Cited By (7)
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| CN106588050A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-pore magnesite-chrome brick for nonferrous metallurgy and preparation method thereof |
| CN106588051A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-porosity magnesite-chrome brick and preparation method thereof |
| CN108383506A (en) * | 2018-03-12 | 2018-08-10 | 海城利尔麦格西塔材料有限公司 | A kind of preparation method of magnesium Cr-Zr brick |
| CN110563439A (en) * | 2019-10-17 | 2019-12-13 | 安徽海螺暹罗耐火材料有限公司 | Novel bonding agent for alkaline brick and preparation method of alkaline brick |
| CN111348900A (en) * | 2020-04-09 | 2020-06-30 | 海城市中昊镁业有限公司 | Preparation method of kiln-sticking-proof furnace lining for vertical kiln of dead-burned magnesia |
| CN111825468A (en) * | 2020-06-30 | 2020-10-27 | 郑州华威耐火材料有限公司 | Fused and recombined magnesia-chrome brick and preparation method and application thereof |
| CN113200736A (en) * | 2021-04-20 | 2021-08-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace lining of ferrovanadium smelting furnace and preparation method thereof |
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| CN106588050A (en) * | 2016-12-15 | 2017-04-26 | 河南瑞泰耐火材料科技有限公司 | Low-pore magnesite-chrome brick for nonferrous metallurgy and preparation method thereof |
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| CN110563439A (en) * | 2019-10-17 | 2019-12-13 | 安徽海螺暹罗耐火材料有限公司 | Novel bonding agent for alkaline brick and preparation method of alkaline brick |
| CN111348900A (en) * | 2020-04-09 | 2020-06-30 | 海城市中昊镁业有限公司 | Preparation method of kiln-sticking-proof furnace lining for vertical kiln of dead-burned magnesia |
| CN111825468A (en) * | 2020-06-30 | 2020-10-27 | 郑州华威耐火材料有限公司 | Fused and recombined magnesia-chrome brick and preparation method and application thereof |
| CN113200736A (en) * | 2021-04-20 | 2021-08-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace lining of ferrovanadium smelting furnace and preparation method thereof |
| CN113200736B (en) * | 2021-04-20 | 2022-05-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace lining of ferrovanadium smelting furnace and preparation method thereof |
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