CN102249713A - Magnesium-titanium hollow ball and preparation method thereof - Google Patents
Magnesium-titanium hollow ball and preparation method thereof Download PDFInfo
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- CN102249713A CN102249713A CN2011101451885A CN201110145188A CN102249713A CN 102249713 A CN102249713 A CN 102249713A CN 2011101451885 A CN2011101451885 A CN 2011101451885A CN 201110145188 A CN201110145188 A CN 201110145188A CN 102249713 A CN102249713 A CN 102249713A
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Abstract
The invention relates to a magnesium-titanium hollow ball containing, by mass, 90-99.9% of MgO and 0.1-10% of TiO2. With magnesium-containing substances and titanium-containing substances as the main raw materials, the method of the invention comprises the steps of: introducing an additive to adjust the melt components and viscosity, carrying out smelting in a three-phase AC (alternating current) arc ore smelting furnace or a direct current arc ore smelting furnace, dumping the melt, conducting blowing with air as well as sieving, thus obtaining a magnesium-titanium hollow ball of 0.2-5mm. The invention provides a magnesium-titanium hollow ball and its preparation method. The magnesium-titanium hollow ball provided takes low cost, wear resistance, anti-erosion capacity and thermal shock resistance into consideration, and has good applicability.
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 titanium 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 titanium hollow ball contains MgO and TiO in the magnesium titanium hollow ball
2, wherein MgO quality percentage composition is 90～99.9%, TiO
2The quality percentage composition is 0.1～10%.
Among the present invention, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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 titanium hollow ball, described preparation method's step is as follows:
1) will contain magnesium material and titaniferous materials by the proportioning mixing, maybe will contain magnesium material, titaniferous materials and additive, obtain admixtion by the ratio requirement mixing;
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+TiO in the melt 2800～3200 ℃ of meltings
2The quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnesium titanium hollow ball that obtains 0.2～5mm.
Further, the described magnesium raw material that contains is one or more a arbitrary combination in light-magnesite powder, magnesia, rhombspar or the magnesite.
Further again, described titaniferous materials is titanium oxide powder or titanium slag.
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 being main raw material to contain magnesium material or titaniferous materials, introduce additive simultaneously and adjust melt composition and viscosity, make magnesium titanium hollow ball, make it to have than magnesium oxide hollow ball and have better anti-thermal shock characteristic and compressive strength by the winding-up melt.
Beneficial effect of the present invention mainly shows: prepared magnesium titanium hollow ball has characteristics such as compressive strength height, fracture toughness property 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, MgO quality percentage composition is 92.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 2.8%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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 magnesia 97% and titanium oxide powder 3% adopt coke, charcoal and iron oxide red as additive, and the consumption of coke and charcoal guarantees that the C molar weight is SiO in the batching
23 times of molar weight, the consumption of iron oxide red 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 2800 ℃ of meltings to fusion, refining 30 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 92.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 2.8%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 2:
In the present embodiment, MgO quality percentage composition is 91.5% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 3.5%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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 78.0%, magnesia 18.0% and titanium slag 4.0% 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 3000 ℃ of meltings, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 91.5% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 3.5%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 3:
In the present embodiment, MgO quality percentage composition is 90.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 4.8%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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, wherein light-magnesite powder 49%, magnesite 47%, titanium oxide powder 1% and titanium slag 3%, 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 3100 ℃ of meltings, refining 10 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 90.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 4.8%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 4:
In the present embodiment, MgO quality percentage composition is 92.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 2.8%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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, wherein magnesia 17.0%, light calcined magnesia 69.0%, magnesite 11.0% and titanium slag 3.0%, adopt refinery coke, iron oxide black and iron filings as additive, 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 3000 ℃ of meltings, refining 50 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 92.2% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 2.8%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 5:
In the present embodiment, MgO quality percentage composition is 91.1% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 3.9%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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, wherein magnesite 98%, titanium slag 1.3% and titanium oxide powder 0.7%, adopt charcoal, graphite, iron ore and steel scrap as additive, 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 2800 ℃ of meltings, refining 30 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 91.1% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 3.9%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 6:
In the present embodiment, MgO quality percentage composition is 94.1% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 0.9%, and the quality percentage composition of other materials is 5%, because purification technique restriction in material purity and the production technique, MgO and TiO
2Quality 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 calcined magnesia 99%, titanium slag 0.5% and titanium oxide powder 0.5% 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 3200 ℃ of meltings, refining 80 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 94.1% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 0.9%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate
Embodiment 7
In the present embodiment, MgO quality percentage composition is 99.9% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 0.1%.
The preparation method is: proportioning raw materials adopts quality percentage composition, wherein highly-purity magnesite (MgO quality percentage composition is greater than 99.99%) 99% and high-purity titanium oxide powder (TiO
2The quality percentage composition is greater than 99.99%) 0.1%; 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 3200 ℃ of meltings, refining 50 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 99.9% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 0.1%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick aggregate.
Embodiment 8
In the present embodiment, MgO quality percentage composition is 90.0% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 10.0%.
The preparation method is: proportioning raw materials adopts quality percentage composition, wherein highly-purity magnesite (MgO quality percentage composition is greater than 99.99%) 90.0% and high-purity titanium oxide powder (TiO
2The quality percentage composition is greater than 99.99%) 10.0%; 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 3200 ℃ of meltings, refining 40 minutes; Melting finishes, the turndown winding-up; The ball screening is obtained the high temperature resistant hollow ball of magnesium titanium of 0.2～5mm.MgO quality percentage composition is 90.0% in the magnesium titanium hollow ball, TiO
2The quality percentage composition is 10.0%, and product can be used as high-strength light mould material and light cinder brick and alkaline composite brick 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 titanium hollow ball is characterized in that: contain MgO and TiO in the described magnesium titanium hollow ball
2, wherein MgO quality percentage composition is 90～99.9%, TiO
2The quality percentage composition is 0.1～10%.
2. the preparation method of a magnesium titanium 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 titaniferous materials by the proportioning mixing, maybe will contain magnesium material, titaniferous materials and additive, obtain admixtion by the ratio requirement mixing;
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+TiO in the melt 2800～3200 ℃ of meltings
2The quality percentage composition is not less than 90%;
3) melting finishes, the turndown winding-up;
4) ball is sieved the magnesium titanium hollow ball that obtains 0.2～5mm.
3. the preparation method of magnesium titanium 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 titanium hollow ball as claimed in claim 2 is characterized in that: described titaniferous materials is titanium oxide powder or titanium slag.
5. the preparation method of magnesium titanium 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 titanium 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 titanium 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 titanium 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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| CN102249716A (en) * | 2011-05-31 | 2011-11-23 | 傅晓云 | High-temperature resistant hollow spheres and preparation method thereof |
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Application publication date: 20111123 |