CN102295462A - Magnesium-chromium hollow ball and preparation method thereof - Google Patents
Magnesium-chromium hollow ball and preparation method thereof Download PDFInfo
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- CN102295462A CN102295462A CN2011101556891A CN201110155689A CN102295462A CN 102295462 A CN102295462 A CN 102295462A CN 2011101556891 A CN2011101556891 A CN 2011101556891A CN 201110155689 A CN201110155689 A CN 201110155689A CN 102295462 A CN102295462 A CN 102295462A
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Abstract
The invention relates to a magnesium-chromium hollow ball. The magnesium-chromium hollow ball comprises, by mass, 70-99.9% of MgO and 0.1-30% of Cr2O3. The magnesium-chromium hollow ball is prepared by treating various substances containing magnesium and various substances containing chromium as main raw materials, introducing an additive to adjust the composition and the viscosity of a melt, melting in a three-phase AC arc ore thermal furnace or a direct current arc ore thermal furnace, dumping the melt, blowing with air, and screening to obtain the magnesium-chromium hollow ball with the size of 0.2-5mm. According to the invention, the magnesium-chromium hollow ball which has the advantages of low cost, wear resistance, erosion resistance, thermal shock resistance, and good applicability and a preparation method thereof are provided.
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 magnesium chromium 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 magnesium chromium hollow ball contains MgO and Cr in the magnesium chromium hollow ball
2O
3, wherein MgO quality percentage composition is 70～99.9%, Cr
2O
3The quality percentage composition is 0.1～30%.
Among the present invention, because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
A kind of preparation method of magnesium chromium hollow ball, described preparation method's step is as follows:
1) will contain magnesium material and contain the chromium material and mix, or just contain the magnesium material, contain chromium material and additive, obtain admixtion by the ratio requirement mixing by proportioning;
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 MgO+Cr in the melt 2600～3200 ℃ of meltings
2O
3The quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnesium chromium hollow ball that obtains 0.2～5mm.
Further, the described magnesium material that contains is one or more a arbitrary combination in light-magnesite powder, magnesia, rhombspar or the magnesite.
Further again, the described chromium material that contains is chrome ore or chromium oxide powder.
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 introduced additive simultaneously and is adjusted melt composition and viscosity for to contain the magnesium material or contain the chromium material be main raw material with various, makes magnesium chromium hollow ball by the winding-up melt, makes it to have the functional character different with other components.
Beneficial effect of the present invention mainly shows: prepared magnesium chromium hollow ball has characteristics such as compressive strength height, erosion-resisting characteristics be good, and thermal and insulating performance is good, 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, the quality percentage composition of MgO is 80.9% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 14.1%, the quality percentage composition of other materials is 5% because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
The preparation method is: proportioning raw materials adopts the quality percentage composition, and wherein light-magnesite powder 68.0%, magnesia 13.0% and chromic oxide 19.0% adopt refinery coke as additive, and the consumption of refinery coke guarantees that the C molar weight is SiO in the batching in the refinery coke
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 3200 ℃ of meltings, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 80.9% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 14.1%, product can be used as high-strength light mould material and light heat-insulation brick and magnesium chromium composite brick light heat insulation layer aggregate.
Embodiment 2:
In the present embodiment, the quality percentage composition of MgO is 79.4% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 15.6%, the quality percentage composition of other materials is 5% because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
Proportioning raw materials adopts the quality percentage composition, wherein light-magnesite powder 60%, magnesite 20% and chrome ore 20%, adopt coal, graphite, pitch, iron ore and iron oxide red as additive, coal, graphite and bituminous consumption guarantee that the C molar weight is SiO in the batching in the refinery coke
20.8 times of molar weight, the consumption of iron ore and iron oxide red guarantee that the Fe molar weight is SiO in the batching
25 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 3000 ℃ of meltings, refining 10 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained 0.2～5mm chromium magnesium chromium hollow ball.The quality percentage composition of MgO is 79.4% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 15.6%, product can be used as high-strength light mould material and light cinder brick and magnesium chromium composite brick light heat insulation layer aggregate.
Embodiment 3:
In the present embodiment, the quality percentage composition of MgO is 93.5% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 1.5%, the quality percentage composition of other materials is 5% because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
Proportioning raw materials adopts the quality percentage composition, and wherein magnesia 98%, chromic oxide 0.8% and chrome ore 1.2% adopt refinery coke, iron oxide black and iron filings as additive, and the consumption of refinery coke guarantees that the C molar weight is SiO in the batching in the refinery coke
23 times of molar weight, the consumption of iron oxide black and iron filings guarantee that the Fe molar weight is SiO in the batching
22 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 2900 ℃ of meltings, refining 50 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 93.5% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 1.5%, product can be used as high-strength light mould material and light cinder brick and magnesium chromium composite brick light heat insulation layer aggregate.
Embodiment 4:
In the present embodiment, the quality percentage composition of MgO is 73.7% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 21.3%, the quality percentage composition of other materials is 5% because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
Proportioning raw materials adopts the quality percentage composition, and wherein magnesia 60%, magnesite 20% and chromic oxide 20% adopt charcoal, graphite, iron ore and steel scrap as additive, and the consumption of charcoal and graphite guarantees that the C molar weight is SiO in the batching in the refinery coke
22 times of molar weight, the consumption of iron ore and steel scrap guarantee that the Fe molar weight is SiO in the batching
23.4 times of molar weight; The raw material back of working good was mixed in ball mill 1.4 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 3000 ℃ of meltings, refining 30 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 73.7% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 21.3%, product can be used as high-strength light mould material and light cinder brick and magnesium chromium composite brick light heat insulation layer aggregate.
Embodiment 5:
In the present embodiment, the quality percentage composition of MgO is 78.3% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 16.7%, the quality percentage composition of other materials is 5% because purification technique restriction in material purity and the production technique, MgO and Cr
2O
3Quality percentage composition sum contains a certain amount of other material less than 100% in the hollow ball, but does not influence use.
Proportioning raw materials adopts the quality percentage composition, and wherein light calcined magnesia 50%, magnesite 30% and chrome ore 20% adopt coal and refinery coke as additive, and the consumption of coal and refinery coke guarantees that the C molar weight is SiO in the batching in the refinery coke
21.2 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 2600 ℃ of meltings, refining 80 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 78.3% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 16.7%, product can be used as high-strength light mould material and light cinder brick and magnesium chromium composite brick light heat insulation layer aggregate.
Embodiment 6:
In the present embodiment, the quality percentage composition of MgO is 99.9% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 0.1%.
Proportioning raw materials adopts quality percentage composition, wherein highly-purity magnesite (the quality percentage composition of MgO is greater than 99.99%) 99.9% and high-purity chromic oxide (Cr
2O
3The quality percentage composition greater than 99.99%) 0.1%; The raw material back of working good was mixed in ball mill 1.4 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 3000 ℃ of meltings, refining 30 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 99.9% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 0.1%, product can be used as high-strength light mould material and light cinder brick aggregate.
Embodiment 7:
In the present embodiment, the quality percentage composition of MgO is 70% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 30%.
Proportioning raw materials adopts quality percentage composition, wherein highly-purity magnesite (the quality percentage composition of MgO is greater than 99.99%) 70% and high-purity chromic oxide (Cr
2O
3The quality percentage composition greater than 99.99%) 30%; The raw material back of working good was mixed in ball mill 1.4 hours; Admixtion is dropped in the direct current electric arc furnace, adjust electric current and voltage 3000 ℃ of meltings, refining 30 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the magnesium chromium hollow ball of 0.2～5mm.The quality percentage composition of MgO is 70% in the magnesium chromium hollow ball, Cr
2O
3The quality percentage composition be 30%, product can be used as high-strength light mould material and light cinder brick and magnesium chromium composite brick light heat insulation layer 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 (8)
1. a magnesium chromium hollow ball is characterized in that: contain MgO and Cr in the described magnesium chromium hollow ball
2O
3, wherein MgO quality percentage composition is 70～99.9%, Cr
2O
3The quality percentage composition is 0.1～30%.
2. the preparation method of a magnesium chromium hollow ball as claimed in claim 1, it is characterized in that: described preparation method's step is as follows:
1) will contain magnesium material and contain the chromium material and mix, or just contain the magnesium material, contain chromium material and additive, obtain admixtion by the ratio requirement mixing by proportioning;
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 MgO+Cr in the melt 2600～3200 ℃ of meltings
2O
3The quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnesium chromium hollow ball that obtains 0.2～5mm.
3. the preparation method of magnesium chromium 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.
4. the preparation method of magnesium chromium hollow ball as claimed in claim 2 is characterized in that: the described chromium material that contains is chrome ore or chromium oxide powder.
5. the preparation method of magnesium chromium 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.
6. the preparation method of magnesium chromium 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.
7. as the preparation method of claim 5 or 6 described magnesium chromium 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.
8. the preparation method of magnesium chromium hollow ball as claimed in claim 6 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557698A (en) * | 2012-03-15 | 2012-07-11 | 浙江大学苏州工业技术研究院 | Aluminum-containing hollow sphere light-weight brick and preparation method thereof |
| CN102580634A (en) * | 2012-01-09 | 2012-07-18 | 北京师范大学 | Chromium hydroxide nano hollow structure with high catalytic performance |
| CN102584303A (en) * | 2012-03-15 | 2012-07-18 | 浙江大学苏州工业技术研究院 | Alkaline bubble brick and preparation method thereof |
| CN107585779A (en) * | 2017-10-13 | 2018-01-16 | 中南大学 | A kind of preparation method containing chrome-magnesite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109678A (en) * | 1993-05-17 | 1995-10-04 | 胡坦斯·阿尔伯图斯化学厂有限公司 | Black wash for producing mould coatings |
| CN101544851A (en) * | 2008-03-26 | 2009-09-30 | 河南富莱格超硬材料有限公司 | Metallic bond hollow sphere-shaped super-hard compound material and manufacturing method thereof |
| CN101798230A (en) * | 2010-03-09 | 2010-08-11 | 浙江大学 | Preparation method of zirconium oxide toughening aluminum oxide hollow balls |
| CN101863672A (en) * | 2010-06-01 | 2010-10-20 | 浙江大学 | Preparation method of alumina corundum hollow sphere |
-
2011
- 2011-06-10 CN CN2011101556891A patent/CN102295462A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109678A (en) * | 1993-05-17 | 1995-10-04 | 胡坦斯·阿尔伯图斯化学厂有限公司 | Black wash for producing mould coatings |
| CN101544851A (en) * | 2008-03-26 | 2009-09-30 | 河南富莱格超硬材料有限公司 | Metallic bond hollow sphere-shaped super-hard compound material and manufacturing method thereof |
| CN101798230A (en) * | 2010-03-09 | 2010-08-11 | 浙江大学 | Preparation method of zirconium oxide toughening aluminum oxide hollow balls |
| CN101863672A (en) * | 2010-06-01 | 2010-10-20 | 浙江大学 | Preparation method of alumina corundum hollow sphere |
Non-Patent Citations (2)
| Title |
|---|
| 《耐火材料》 20090430 刘欣 等 "钛酸铝-莫来石-镁铝尖晶石质空心球的研制" 第43卷, 第2期 * |
| 刘欣 等: ""钛酸铝-莫来石-镁铝尖晶石质空心球的研制"", 《耐火材料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580634A (en) * | 2012-01-09 | 2012-07-18 | 北京师范大学 | Chromium hydroxide nano hollow structure with high catalytic performance |
| CN102557698A (en) * | 2012-03-15 | 2012-07-11 | 浙江大学苏州工业技术研究院 | Aluminum-containing hollow sphere light-weight brick and preparation method thereof |
| CN102584303A (en) * | 2012-03-15 | 2012-07-18 | 浙江大学苏州工业技术研究院 | Alkaline bubble brick and preparation method thereof |
| CN107585779A (en) * | 2017-10-13 | 2018-01-16 | 中南大学 | A kind of preparation method containing chrome-magnesite |
| CN107585779B (en) * | 2017-10-13 | 2019-10-22 | 中南大学 | A kind of preparation method containing chrome-magnesite |
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Application publication date: 20111228 |