CN102249717A - Magnesium-aluminum-calcium hollow sphere and preparation method thereof - Google Patents
Magnesium-aluminum-calcium hollow sphere and preparation method thereof Download PDFInfo
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- CN102249717A CN102249717A CN2011101456713A CN201110145671A CN102249717A CN 102249717 A CN102249717 A CN 102249717A CN 2011101456713 A CN2011101456713 A CN 2011101456713A CN 201110145671 A CN201110145671 A CN 201110145671A CN 102249717 A CN102249717 A CN 102249717A
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Abstract
The invention discloses a magnesium-aluminum-calcium hollow sphere which comprises the following components in percentage by mass: 0.01-99.9 percent of Al2O3, 0.01-99.9 percent of CaO and 0.01-99.9 percent of MgO. A preparation method of the magnesium-aluminum-calcium hollow sphere comprises the following steps of: introducing an additive to various aluminum-containing substances, magnesium-containing substances and calcium-containing substances serving as main raw materials to adjust the component and the viscosity of a melt; smelting in a three-phase alternating-current electric arc submerged arc furnace or a direct-current electric arc submerged arc furnace; pouring the melt; jetting with air; and sieving to obtain the magnesium-aluminum-calcium hollow sphere of 0.2-5 millimeters. The invention provides the magnesium-aluminum-calcium hollow sphere with the advantages of low cost, wear resistance, erosion resistance, thermal shock resistance and high suitability and the preparation method thereof.
Description
Technical field
The present invention relates to belong to technical field of refractory materials, especially a kind of hollow ball and preparation method thereof.
Background technology
In traditional energy exhaustion and today of new forms of energy slower development day by day, the most urgent current task is that exploitation lightweight, high-strength, good thermal shock stability, use temperature high energy satisfy the required inner lining material of light structures High Temperature Furnaces Heating Apparatus, change that traditional ultrahigh-temperature kiln is big owing to the thermal capacity that adopts the heavy structure to exist, temperature rise rate is low, energy consumption is big, work-ing life is short, maintenance capacity in mid-term shortcoming such as big, save energy, cut down the consumption of energy, for building a resource-conserving society and the human kind sustainable development service.
Because light heat insulation material is to obtain lower thermal conductivity by the mode of introducing pore, introduce serious, the compressive strength reduction of the raising of heavily burning linear shrinkage ratio, refractoriness under load reduction, high temperature creep that a large amount of pores can cause light material, thereby the use temperature that makes lagging material is difficult to improve, and range of application is restricted, therefore seeking new method prepares the focus that new high temperature insulating material is the various countries expert always.In existing lagging material, aluminum oxide lagging material kind is maximum, the use temperature height, heat-insulating and energy-saving is effective, it is the lagging material of giving priority to now, wherein the application of lightweight alumina hollow ball pottery is a sign of lagging material technical progress, it has overcome, and original foamed alumina product strength is low, the shortcoming of high-temperature creep resistance difference, can directly contact flame, also can be used as high temperature inner lining structure material uses, can promote the transformation of conventional high-temperature furnace construction, for design novel kiln structure lays the foundation.Alumina hollow ball is a kind of high temperature insulating material of excellent performance, it is to form with the higher aluminum oxide melting blowing in electric furnace of purity, with the alumina hollow ball is that main body can be made into the different shape goods, 1800 ℃ of maximum operation (service) temperatures, products machinery intensity height, be the several times of general light weight product, and volume density can reach corundum products half in addition lower.Employing can also be prepared the zirconium white hollow ball with quadrat method, and use temperature also can reach more than 2100 ℃, but because therefore the zirconium white expensive raw material price is difficult to large-scale promotion application in industrial production.Simultaneous oxidation aluminium hollow ball is difficult to obtain large-scale application also because of cost performance, and with respect to the total amount of refractory materials, ratio is less.The hollow ball of present existing several materials, the temperature that needs in the fusion process is higher, not only quite high with electric energy consumption, preparation condition is required very harsh, for relevant auxiliary facility acid test is arranged all, and composition is more single, and the performance at aspects such as anti-erosion, heat-shock resistances has much room for improvement, and use range also is restricted.Be further to expand the range of application of hollow ball, particularly successfully develop, establish the basis of electric smelting hollow ball step large-scale application based on the proposition and the portioned product of the structure/heat-insulating integrated composite brick notion of hollow ball.Both structure/heat-insulating integrated composite brick be composited by heavy working lining/light heat insulation layer, and the different components working lining needs the electric smelting hollow ball coupling of different components, otherwise is prone to surface reaction, influences product properties.
In addition, mould material based on low-cost electric smelting hollow ball occurs, different environment for use conditions has put forward different component requirements, the electric smelting hollow ball that requires that has has better heat-shock resistance, what have requires better wear resistance and corrosion resistance strong, the requirement low cost that has, these all need the raw material of different components and different costs specifically to satisfy these requirements.
Summary of the invention
Can not take into account low cost, wear resistance and corrosion resistance and heat-shock resistance, the relatively poor deficiency of suitability for what overcome existing hollow ball and preparation method thereof, the invention provides and to take into account low cost, wear resistance and corrosion resistance and heat-shock resistance simultaneously, have magnalium calcium hollow ball of good applicability and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of magnalium calcium hollow ball contains Al in the magnalium calcium hollow ball
2O
3, CaO and MgO, wherein Al
2O
3The quality percentage composition is 0.01～99.9%, and CaO quality percentage composition is 0.01～99.9%, and MgO quality percentage composition is 0.01～99.9%.
Among the present invention, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
A kind of preparation method of magnalium calcium hollow ball, described preparation method's step is as follows:
1) with calcareous material, aluminium-containing substance with contain the magnesium material and mix by proportioning, or with calcareous material, aluminium-containing substance, contain magnesium material and additive by the ratio requirement mixing, obtain admixtion;
2) admixtion is dropped in three-phase or the direct current electric arc furnace, adjust electric current and voltage, until fusion, refining 10～80 minutes makes Al in the melt 1800～2800 ℃ of meltings
2O
3+ CaO+MgO quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnalium calcium hollow ball that obtains 0.2～5mm.
Further, described aluminium-containing substance is one or more a arbitrary combination of commercial alumina, aluminium hydroxide, alumine or aluminium slag.
Further again, described calcareous material is one or more the arbitrary combination in unslaked lime, slaked lime, limestone, rhombspar or the calcite.
Further, the described magnesium material that contains is one or more a arbitrary combination in light-magnesite powder, magnesia, rhombspar or the magnesite.
Described additive is a carbon materials, and as the desiliconization material, consumption is SiO in the admixtion
21.2～4 times of mole number.
When described additive was the mixture of carbon materials and iron content component substances, the carbon materials consumption was SiO in the admixtion
20.8～3 times of mole number, the iron molar content is SiO in the admixtion in the iron content component substances
22～5 times of mole number.
Described carbon materials is graphite, refinery coke, forge one or more the arbitrary combination in back Jiao, coal, coke, pitch or the charcoal.
Described iron content component substances is one or more the arbitrary combination in iron filings, iron ore, iron oxide red, iron oxide black, scrap iron or the steel scrap.
Among the present invention, the know-why of institute's foundation is for various calcareous materials or aluminium-containing substance or to contain the magnesium material be main raw material, introduce additive simultaneously and adjust melt composition and viscosity, make magnalium calcium hollow ball, make it to have the functional character different with the hollow ball of other materials by the winding-up melt.
Beneficial effect of the present invention mainly shows: prepared magnalium calcium hollow ball has characteristics such as compressive strength height, thermal and insulating performance be good, can significantly reduce the power consumption in the fusion process, reduce production costs greatly, the demand of low temperature kiln in satisfying, and thermal and insulating performance is good and the compressive strength height, be especially suitable for use as the aggregate in lagging material and the lightening casting material, the heat insulating requirement of low temperature working conditions in can satisfying
Embodiment
Below the present invention is further described.
Embodiment 1:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 63.6%, and CaO quality percentage composition is 21.5%, and MgO quality percentage composition is 9.9%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is commercial alumina 30%, aluminium hydroxide 33%, light-magnesite powder 8%, slaked lime 9% and limestone 20% by quality percentage composition proportioning.Adopt coal and coke as additive, the consumption of coal and coke guarantees that the C molar weight is SiO in the batching
21.2 times of molar weight; The raw material back of working good was mixed in ball mill 2 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 1800 ℃ of meltings to fusion, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 63.6%, and CaO quality percentage composition is 21.5%, and MgO quality percentage composition is 9.9%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 2:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 28.1%, and CaO quality percentage composition is 34.8%, and MgO quality percentage composition is 32.1%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is alumine 30%, magnesia 20% and limestone 50% by quality percentage composition proportioning, adopts graphite, refinery coke, iron oxide black, iron and iron oxide red as additive, and the consumption of graphite, refinery coke guarantees that the C molar weight is SiO in the batching
21 times of molar weight, the consumption of iron oxide black, iron and iron oxide red guarantee that the Fe molar weight is SiO in the batching
22.5 times of molar weight; The raw material back of working good was mixed in ball mill 1.8 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2200 ℃ of meltings to fusion, refining 20 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 28.1%, and CaO quality percentage composition is 34.8%, and MgO quality percentage composition is 32.1%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 3:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 53.2%, and CaO quality percentage composition is 15.8%, and MgO quality percentage composition is 30.0%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is aluminium slag 20%, aluminium hydroxide 20%, magnesite 40%, calcite 20% by quality percentage composition proportioning.Adopt graphite, refinery coke, pitch, iron filings and scrap iron as additive, graphite, refinery coke and bituminous consumption guarantee that the C molar weight is SiO in the batching
20.8 times of molar weight, the consumption of iron filings and scrap iron guarantee that the Fe molar weight is SiO in the batching
22.0 times of molar weight; The raw material back of working good was mixed in ball mill 1.6 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2300 ℃ of meltings to fusion, refining 10 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 53.2%, and CaO quality percentage composition is 15.8%, and MgO quality percentage composition is 30.0%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 4:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 67.4%, and CaO quality percentage composition is 6.2%, and MgO quality percentage composition is 21.4%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is commercial alumina 40%, alumine 30%, rhombspar 20%, magnesia 5% and limestone 5% by quality percentage composition proportioning, it is additive that back Jiao, charcoal work, steel scrap and iron ore are forged in employing, and the consumption of forging back Jiao, charcoal guarantees that the C molar weight is SiO in the batching
23 times of molar weight; The consumption of steel scrap and iron ore guarantees that the Fe molar weight is SiO in the batching
25 times of molar weight mix the raw material back of working good 1.4 hours in ball mill; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2000 ℃ of meltings to fusion, refining 80 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 67.4%, and CaO quality percentage composition is 6.2%, and MgO quality percentage composition is 21.4%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 5:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 75.4%, and CaO quality percentage composition is 6.0%, and MgO quality percentage composition is 13.6%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is alumine 85%, light-magnesite powder 6%, slaked lime 5% and limestone 4% by quality percentage composition proportioning.Adopt coal and coke as additive, the consumption of coal and coke guarantees that the C molar weight is SiO in the batching
24 times of molar weight; The raw material back of working good was mixed in ball mill 2 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2100 ℃ of meltings to fusion, refining 10 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 75.4%, and CaO quality percentage composition is 6.0%, and MgO quality percentage composition is 13.6%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 6:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 8.0%, and CaO quality percentage composition is 5.3%, and MgO quality percentage composition is 81.7%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is commercial alumina 5%, magnesia 85% and limestone 10% by quality percentage composition proportioning, adopts coal, coke, iron oxide black, iron and iron oxide red as additive, and the consumption of coal, coke guarantees that the C molar weight is SiO in the batching
23 times of molar weight, the consumption of iron oxide black, iron and iron oxide red guarantee that the Fe molar weight is SiO in the batching
22.5 times of molar weight; The raw material back of working good was mixed in ball mill 1.8 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2000 ℃ of meltings to fusion, refining 20 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 8.0%, and CaO quality percentage composition is 5.3%, and MgO quality percentage composition is 81.7%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 7:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 8.6%, and CaO quality percentage composition is 81.7%, and MgO quality percentage composition is 4.7%, and the quality percentage composition of other materials is 5%, since purification technique restriction in material purity and the production technique, Al
2O
3, CaO and MgO quality percentage composition sum be less than 100%, contain a certain amount of other material in the hollow ball, but do not influence use.
The preparation method is: raw material is commercial alumina 5%, aluminium hydroxide 5%, magnesite 10%, unslaked lime 77%, calcite 3% by quality percentage composition proportioning.Adopt graphite, refinery coke, pitch, iron filings and scrap iron as additive, graphite, refinery coke and bituminous consumption guarantee that the C molar weight is SiO in the batching
20.8 times of molar weight, the consumption of iron filings and scrap iron guarantee that the Fe molar weight is SiO in the batching
22.0 times of molar weight; The raw material back of working good was mixed in ball mill 1.6 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2300 ℃ of meltings to fusion, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 8.6%, and CaO quality percentage composition is 81.7%, and MgO quality percentage composition is 4.7%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 8:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 99.9%, and CaO quality percentage composition is 0.01%, and MgO quality percentage composition is 0.09%.
The preparation method is: raw material is high purity aluminium hydroxide [Al (OH) by quality percentage composition proportioning
3The quality percentage composition is greater than 99.99%] 99.93%, high-purity unslaked lime [CaO quality percentage composition is greater than 99.99%] 0.01% and highly-purity magnesite [MgO quality percentage composition is greater than 99.99%] 0.06%; The raw material back of working good was mixed in ball mill 1.6 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2300 ℃ of meltings to fusion, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 99.9%, and CaO quality percentage composition is 0.01%, and MgO quality percentage composition is 0.09%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 9:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 0.09%, and CaO quality percentage composition is 99.9%, and MgO quality percentage composition is 0.01%.
The preparation method is: raw material is high purity aluminium hydroxide [Al (OH) by quality percentage composition proportioning
3The quality percentage composition is greater than 99.99%] 0.14%, high-purity unslaked lime [CaO quality percentage composition is greater than 99.99%] 99.85% and highly-purity magnesite [MgO quality percentage composition is greater than 99.99%] 0.01%; The raw material back of working good was mixed in ball mill 1.6 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2300 ℃ of meltings to fusion, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 0.09%, and CaO quality percentage composition is 99.9%, and MgO quality percentage composition is 0.01%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
Embodiment 10:
In the present embodiment, Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 0.01%, and CaO quality percentage composition is 0.09%, and MgO quality percentage composition is 99.9%.
The preparation method is: raw material is high purity aluminium hydroxide [Al (OH) by quality percentage composition proportioning
3The quality percentage composition is greater than 99.99%] 0.015%, high-purity calcium oxide [CaO quality percentage composition is greater than 99.99%] 0.089% and highly-purity magnesite [MgO quality percentage composition is greater than 99.99%] 99.896%; The raw material back of working good was mixed in ball mill 1.6 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 2800 ℃ of meltings to fusion, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnalium calcium of 0.2～5mm.Al in the magnalium calcium hollow ball
2O
3The quality percentage composition is 0.01%, and CaO quality percentage composition is 0.09%, and MgO quality percentage composition is 99.9%, and product can be used as quick slag-forming constituents and uses, and also can be used as high-strength light mould material aggregate.
The foregoing description only is for example clearly is described, is not the qualification that embodiment is done.For the person of an ordinary skill in the technical field; can also make other multi-form variation or changes on the basis of the above description; can't give an example one by one to all embodiments at this, and draw the conspicuous variation of extension thus or change still within the protection domain of the invention.
Claims (9)
1. a magnalium calcium hollow ball is characterized in that: contain Al in the described magnalium calcium hollow ball
2O
3, CaO and MgO, wherein Al
2O
3The quality percentage composition is 0.01～99.9%, and CaO quality percentage composition is 0.01～99.9%, and MgO quality percentage composition is 0.01～99.9%.
2. the preparation method of a magnalium calcium hollow ball as claimed in claim 1, it is characterized in that: described preparation method's step is as follows:
1) with calcareous material, aluminium-containing substance with contain the magnesium material and mix by proportioning, or with calcareous material, aluminium-containing substance, contain magnesium material and additive by the ratio requirement mixing, obtain admixtion;
2) admixtion is dropped in three-phase or the direct current electric arc furnace, adjust electric current and voltage, until fusion, refining 10～80 minutes makes Al in the melt 1800～2800 ℃ of meltings
2O
3+ CaO+MgO quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnalium calcium hollow ball that obtains 0.2～5mm.
3. the preparation method of magnalium calcium hollow ball as claimed in claim 2 is characterized in that: described aluminium-containing substance is one or more a arbitrary combination of commercial alumina, aluminium hydroxide, alumine or aluminium slag.
4. the preparation method of magnalium calcium hollow ball as claimed in claim 2 is characterized in that: described calcareous material is one or more the arbitrary combination in unslaked lime, slaked lime, limestone, rhombspar or the calcite.
5. the preparation method of magnalium calcium hollow ball as claimed in claim 2 is characterized in that: the described magnesium raw material that contains is one or more a arbitrary combination in light-magnesite powder, magnesia, rhombspar or the magnesite.
6. the preparation method of magnalium calcium hollow ball as claimed in claim 2 is characterized in that: described additive is a carbon materials, and as the desiliconization material, consumption is SiO in the admixtion
21.2～4 times of mole number.
7. the preparation method of magnalium calcium hollow ball as claimed in claim 2 is characterized in that: described additive is the mixture of carbon materials and iron content component substances, and the carbon materials consumption is SiO in the admixtion
20.8～3 times of mole number, the iron molar content is SiO in the admixtion in the iron content component substances
22～5 times of mole number.
8. as the preparation method of claim 6 or 7 described magnalium calcium hollow balls, it is characterized in that: described carbon materials is graphite, refinery coke, forge one or more the arbitrary combination in back Jiao, coal, coke, pitch or the charcoal.
9. the preparation method of magnalium calcium hollow ball as claimed in claim 7 is characterized in that: described iron content component substances is one or more the arbitrary combination in iron filings, iron ore, iron oxide red, iron oxide black, scrap iron or the steel scrap.
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Cited By (5)
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| CN102249716A (en) * | 2011-05-31 | 2011-11-23 | 傅晓云 | High-temperature resistant hollow spheres and preparation method thereof |
| CN102826860A (en) * | 2012-08-27 | 2012-12-19 | 苏州罗卡节能科技有限公司 | Low-cost hollow sphere and preparation method and application thereof |
| CN103214250A (en) * | 2012-12-31 | 2013-07-24 | 郑州振中电熔新材料有限公司 | Recycling method for waste alumina brick |
| CN103396127A (en) * | 2013-07-24 | 2013-11-20 | 东北大学 | Aluminum magnesium calcium fire-resistant clinker and preparation method thereof |
| CN105060862A (en) * | 2015-08-13 | 2015-11-18 | 元亮科技有限公司 | Hollow spheres for high-temperature oxide crystal growth thermal field and preparation method of hollow sphere |
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| CN102826860A (en) * | 2012-08-27 | 2012-12-19 | 苏州罗卡节能科技有限公司 | Low-cost hollow sphere and preparation method and application thereof |
| CN103214250A (en) * | 2012-12-31 | 2013-07-24 | 郑州振中电熔新材料有限公司 | Recycling method for waste alumina brick |
| CN103396127A (en) * | 2013-07-24 | 2013-11-20 | 东北大学 | Aluminum magnesium calcium fire-resistant clinker and preparation method thereof |
| CN103396127B (en) * | 2013-07-24 | 2015-01-28 | 东北大学 | Aluminum magnesium calcium fire-resistant clinker and preparation method thereof |
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