CN102603333A - Magnesia-calcia four-layer composite brick and preparation method thereof - Google Patents
Magnesia-calcia four-layer composite brick and preparation method thereof Download PDFInfo
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- CN102603333A CN102603333A CN2012100792247A CN201210079224A CN102603333A CN 102603333 A CN102603333 A CN 102603333A CN 2012100792247 A CN2012100792247 A CN 2012100792247A CN 201210079224 A CN201210079224 A CN 201210079224A CN 102603333 A CN102603333 A CN 102603333A
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Abstract
The invention aims to provide a magnesia-calcia four-layer composite brick with good abrasive resistance, high degree of fire resistance, high structural strength and good heat-insulation property and a preparation of the magnesia-calcia four-layer composite brick. The preparation method realizes the integrated function of fire resistance and heat insulation of the composite brick, and improves the energy-saving effect of a rotary kiln. A heavy work layer prepared by using a magnesia-calcia material as a raw material, a first transition layer prepared by using a magnesite material as the raw material, a second transition layer prepared by using spinel, or magnesia-alumina-chrome, or magnesia-alumina-titania, or magnesia spinel zirconium material as the raw material and a light heat-insulation layer prepared by using a fused hollow ball as the raw material are sequentially stacked on the magnesia-calcia four-layer composite brick in a down-up manner. According to the magnesia-calcia four-layer composite brick, the transition layer is introduced, so that a reaction of the heavy work layer and the soft heat-insulation layer can be avoided, and a product can have good fire-resistance and heat-insulation performance without reducing the service life of the materials, therefore, the effects of saving energy consumption, reducing materials consumption and reducing dosage of a fire resistance material of the rotary kiln is achieved, and the service life of equipment can be effectively prolonged.
Description
Technical field
The invention belongs to technical field of refractory materials, specifically, relate to calcareous four layers of composite brick of a kind of magnesium and preparation method thereof.
Background technology
Along with the continuous appearance of manufacture of cement new technology, the manufacture of cement main process equipment develops to the maximization direction, increases output, improves the quality, saves energy and reduce the cost, reducing cost becomes the key that increases benefit in the production management.Existing refractory brick and insulating brick mostly are single material; Need during use the brick of various performances is used, if on the motionless equipment of relative fixed, like tunnel, down-draft kiln; Be used and meet the demands; But on the equipment of some relative movement,, be used and just be difficult to meet the demands like rotary kiln.Some producers and research unit study this and tackle key problems; And released the composite brick that some heavy material and light material combine, but, can't satisfy request for utilization because lightweight part-structure intensity is low excessively; And heavy part partly reacts because of the material problem with lightweight easily; Thereby having influence on product performance and result of use, therefore do not promote on a large scale, is main with the heavy brick still.
Rotary kiln with the 10000t/d of conch group is an example; Before transitional zone use spinel brick, clinkering zone to use magnesia chrome brick since the thermal conductivity of preceding transitional zone spinel brick and clinkering zone magnesia chrome brick greatly (>=2.7W/mK), make the kiln cylinder body outside wall temperature higher (greatly about about 380 ℃; Can reach 420 ℃ during high temperature); The kiln cylinder body heat radiation is increased, thereby strengthen heat consumption of clinker, cause that the grog unit cost increases; Very easily make the cylindrical shell expanded by heating on the other hand, cause kiln middle part support roller Wa Wendu to raise, especially using the normal operation of later stage or summer to bring big hidden danger to equipment.Cylindrical shell the is heat gain excessively damage probability of mechanical means, quickened barrel distortion, and barrel distortion has quickened the physical disturbance of liner, consequently falls brick, stop kiln, influences the operation factor of cement rotary kiln.
In sum, manufacture of cement industry urgent need is a kind of at present has composite brick fire-resistant, heat insulation dual-use function, so that the barrel temperature at rotary kiln transition belt and clinkering zone position reduces, reduces heat lost by radiation, improves maintenance of the equipment, improves operation rate.
Summary of the invention
The object of the present invention is to provide a kind ofly to have that wear resistance is good, refractoriness is high, structural strength reaches calcareous four layers of composite brick of the good magnesium of thermal and insulating performance and preparation method thereof greatly, realize the refractory heat-insulating one function of composite brick, improve the rotary kiln energy-saving effect.
It is the heavy working lining of feedstock production that the calcareous four layers of composite brick of magnesium of the present invention stack gradually with the magnesium calcareous material from the bottom to top; With the magnesian is first transition layer of feedstock production; With spinel or magnalium chromium or magnalium titanium or magnesia spinel zirconium material is second transition layer of feedstock production, is the light heat insulation layer of feedstock production with the electric smelting hollow ball.
Above-mentioned heavy working lining fire-resistant effective, the good heat-insulation effect of light heat insulation layer, and first transition layer, second transition layer can play transitional function, avoid heavy working lining and light heat insulation layer to produce reaction, influence result of use and life-span.
Further, for guaranteeing fire-resistant effect, said heavy working lining comprises the MgO that accounts for gross weight 80～87% at least, accounts for the CaO of gross weight 6～20%.Other components that all the other are introduced for raw material.
Further; Be to guarantee that effect of heat insulation, the electric smelting hollow ball in the said light heat insulation layer are one or more the combinations in alumina hollow ball, corundum bollow ball, aluminium calcium hollow ball, aluminium titanium hollow ball, chromium corundum hollow ball, zircon corundum hollow ball, magnalium hollow ball, magnalium calcium hollow ball, magnesium calcium hollow ball, magnesium chromium hollow ball, magnesium titanium hollow ball, the Natural manganese dioxide hollow ball; Said alumina hollow ball contains the Al that accounts for gross weight 98% at least
2O
3Said corundum bollow ball contains the Al that accounts for gross weight 93% at least
2O
3Said aluminium calcium hollow ball contains the Al that accounts for gross weight 0.1～99.9%
2O
3, and contain the CaO that accounts for gross weight 0.1～99.9%; Said aluminium titanium hollow ball contains the Al that accounts for gross weight 40～99.9%
2O
3, and contain the TiO that accounts for gross weight 0.1～60%
2Said chromium corundum hollow ball contains the Al that accounts for gross weight 70～99.9%
2O
3, and contain the Cr that accounts for gross weight 0.1～30%
2O
3Said zircon corundum hollow ball contains the Al that accounts for gross weight 90～99.9%
2O
3, and contain the ZrO that accounts for gross weight 0.1～10%
2Said magnalium hollow ball contains the Al that accounts for gross weight 0.1～99.9%
2O
3, and contain the MgO that accounts for gross weight 0.1～99.9%; Said magnalium calcium hollow ball contains the CaO that accounts for gross weight 0.01～99.9%, and contains the Al that accounts for gross weight 0.01～99.9%
2O
3, and contain the MgO that accounts for gross weight 0.01～99.9%; Said magnesium calcium hollow ball contains the CaO that accounts for gross weight 0.1～99.9%, and contains the MgO that accounts for gross weight 0.01～99.9%; Said magnesium chromium hollow ball contains the MgO that accounts for gross weight 70～99.9%, and contains the Cr that accounts for gross weight 0.1～30%
2O
3Said magnesium titanium hollow ball contains and accounts for gross weight 90～99.9%MgO, and contains the TiO that accounts for gross weight 0.1～10%
2Said Natural manganese dioxide hollow ball contains the MgO that accounts for gross weight 95% at least.
Further, for guaranteeing to combine well between compact structure, each layer, said first transition layer and second transition layer are raw materials used to be made up of particle and fine powder, or is made up of hollow ball and fine powder.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium that the present invention proposes comprises the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 10～30 minutes;
B: light heat insulation layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer, be divided into four layers to the material chamber of forming mould with dividing plate, after adding the material that is prepared in every layer, extract dividing plate out, adopt vibrations pressurization or mechanical pressing according to size;
F: burn till: the base substrate after the moulding is taken out after 80～150 ℃ of oven dry, and loading of kiln was burnt till in 1600～1700 ℃ of insulations in 3～8 hours.
Said wedding agent is a liquid paraffin.
The calcareous four layers of composite brick of magnesium of the present invention have been introduced transition layer; Can avoid heavy working lining and light heat insulation layer to produce reaction; Make product have good refractory heat-insulating effect under the material situation in work-ing life not reducing; Thereby played energy efficient, reduced materials consumption and the effect that reduces rotary kiln refractory materials consumption, can effectively prolong service life of equipment.
Description of drawings
Fig. 1 is the sectional view of the calcareous four layers of composite brick of magnesium of the present invention.
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify.
Embodiment 1:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is the konite sand of 1～3mm: 20%; Particle diameter is the magnesite clinker of 1～3mm: 15%; Particle diameter is less than 1mm and greater than 325 purpose konite sand: 20%; Particle diameter is less than 1mm and greater than 325 purpose magnesite clinkers: 15%; Particle diameter is 325 purpose konite sand: 16.5%; Particle diameter is 325 purpose magnesite clinkers: 13.5%.
Feed particles grating and quality percentage composition that first transition layer 2 adopts are: particle diameter is the magnesite clinker of 1～3mm; 45%; Particle diameter is not more than 1mm and greater than 325 purpose magnesite clinkers: 25%; Particle diameter is 325 purpose sintering magnesium powder: 30%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are following: particle diameter is the sintering spinel of 1～3mm: 45%; Particle diameter is not more than 1mm and greater than 325 purpose sintering spinels: 25%; Particle diameter is 325 purpose sintering spinel powders: 30%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose corundum bollow balls: 55%, particle diameter is 325 purpose spinel micro mists: 45%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 10 minutes;
B: light heat insulation layer is got the raw materials ready: corundum bollow ball is mixed with wedding agent in proportion, adds the spinel micro mist then in proportion, stir 30 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.2:0.3:1; After adding the material that is prepared in every layer, extract dividing plate out, adopt the vibrations extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 150 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 5% of heavy working lining weight in the A step; The weight of used liquid paraffin is 6% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 3% of the second transition layer weight in the D step.
Embodiment 2:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is the dolomite sand of 1～3mm: 20%; Particle diameter is the electrosmelted magnesite clinker of 1～3mm: 25%; Particle diameter is less than 1mm and greater than 325 purpose dolomite sands: 20%; Particle diameter is 325 purpose dolomite sands: 20%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 15%.
Feed particles grating and quality percentage composition thereof that first transition layer 2 adopts are: particle diameter is the magnesite clinker of 1～3mm: 45%; Particle diameter is not more than 1mm and greater than 325 purpose magnesite clinkers: 25%; Particle diameter is 325 purpose sintering magnesium powder: 30%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are: particle diameter is the electric melting magnesium-aluminium chromium hollow ball of 0.2～5mm: 70%; Particle diameter is 325 purpose electric smelting spinel powders: 30%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose alumina hollow balls: 35%; Particle diameter is greater than 325 purpose aluminium titanium hollow balls: 20%; Particle diameter is 325 purpose lapis amiridiss: 45%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 30 minutes;
B: light heat insulation layer is got the raw materials ready: alumina hollow ball, aluminium titanium hollow ball are mixed with wedding agent in proportion, add lapis amiridis then in proportion, stir 30 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 30 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 30 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.3:0.2:1; After adding the material that is prepared in every layer, extract dividing plate out, the employing machine is pressed extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 80 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 3% of heavy working lining weight in the A step; The weight of used liquid paraffin is 6% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 2% of the second transition layer weight in the D step.
Embodiment 3:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is the dolomite sand of 1～3mm: 10%; Particle diameter is the electrosmelted magnesite clinker of 1～3mm: 30%; Particle diameter is less than 1mm and greater than 325 purpose dolomite sands: 10%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 25%; Particle diameter is 325 purpose ground dolomites: 6%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 19%.
Feed particles grating and quality percentage composition thereof that first transition layer 2 adopts are: particle diameter is the electrosmelted magnesite clinker of 1～3mm: 45%; Particle diameter is not more than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 25%; Particle diameter is 325 purpose electric molten magnesite powder: 30%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are: particle diameter is the sintering spinel hollow ball of 0.2～5mm: 55%; Particle diameter is 325 purpose sintering spinel powders: 45%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose aluminium calcium hollow balls: 20%; Particle diameter is greater than 325 purpose chromium corundum hollow balls: 20%; Particle diameter is greater than 325 purpose zircon corundum hollow balls: 15%; Particle diameter is 325 purpose lapis amiridiss: 45%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 20 minutes;
B: light heat insulation layer is got the raw materials ready: aluminium calcium hollow ball, chromium corundum hollow ball, zircon corundum hollow ball are mixed with wedding agent in proportion, add lapis amiridis then in proportion, stir 20 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.5:0.2:1; After adding the material that is prepared in every layer, extract dividing plate out, the employing machine is pressed extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 150 ℃ of oven dry, and loading of kiln was burnt till in 1600 ℃ of insulations in 5 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 4% of heavy working lining weight in the A step; The weight of used liquid paraffin is 5% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 5% of the second transition layer weight in the D step.
Embodiment 4:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is 1～3mm dolomite sand: 10%; Particle diameter is the electrosmelted magnesite clinker of 1～3mm: 30%; Particle diameter is less than 1mm and greater than 325 purpose dolomite sands: 10%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 25%; Particle diameter is 325 purpose ground dolomites: 6%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 19%.
Feed particles grating and quality percentage composition thereof that first transition layer 2 adopts are: particle diameter is the electrosmelted magnesite clinker of 1～3mm: 45%; Particle diameter is not more than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 25%; Particle diameter is 325 purpose electric molten magnesite powder: 30%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are: particle diameter is the electric melting magnesium-aluminium titanium hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering spinel powders: 40%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose magnesium titanium hollow balls: 20%; Particle diameter is greater than 325 purpose Natural manganese dioxide hollow balls: 40%; Particle diameter is 325 purpose lapis amiridiss: 40%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 20 minutes;
B: light heat insulation layer is got the raw materials ready: magnesium titanium hollow ball, Natural manganese dioxide hollow ball are mixed with wedding agent in proportion, add lapis amiridis then in proportion, stir 20 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.5:0.2:1; After adding the material that is prepared in every layer, extract dividing plate out, adopt the vibrations extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 110 ℃ of oven dry, and loading of kiln was burnt till in 1650 ℃ of insulations in 6 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 4% of heavy working lining weight in the A step; The weight of used liquid paraffin is 5% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 5% of the second transition layer weight in the D step.
Embodiment 5:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is 1～3mm dolomite sand: 20%; Particle diameter is the electrosmelted magnesite clinker of 1～3mm: 25%; Particle diameter is less than 1mm and greater than 325 purpose dolomite sands: 20%; Particle diameter is 325 purpose ground dolomites: 20%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 15%.
Feed particles grating and quality percentage composition thereof that first transition layer 2 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 45%; Particle diameter is not more than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 25%; Particle diameter is 325 purpose electric molten magnesite powder: 30%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are: particle diameter is the electric molten magnesite Zirconium spinel matter hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering spinel powders: 40%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose magnalium hollow balls: 15%; Particle diameter is greater than 325 purpose magnalium calcium hollow balls: 10%; Particle diameter is greater than 325 purpose magnesium calcium hollow balls: 20%; Particle diameter is greater than 325 purpose magnesium chromium hollow balls: 15%; Particle diameter is 325 purpose magnesia powders: 40%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 20 minutes;
B: light heat insulation layer is got the raw materials ready: magnalium hollow ball, magnalium calcium hollow ball, magnesium calcium hollow ball, magnesium chromium hollow ball are mixed with wedding agent in proportion, add magnesia powder then in proportion, stir 20 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 20 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.5:0.2:1; After adding the material that is prepared in every layer, extract dividing plate out, the employing machine is pressed extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 150 ℃ of oven dry, and loading of kiln was burnt till in 1650 ℃ of insulations in 5 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 3% of heavy working lining weight in the A step; The weight of used liquid paraffin is 5% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 5% of the second transition layer weight in the D step.
Embodiment 6:
As shown in Figure 1, the calcareous four layers of composite brick of the magnesium of present embodiment have stacked gradually heavy working lining 1, first transition layer 2, second transition layer 3, light heat insulation layer 4 from the bottom to top.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is the dolomite sand of 1～3mm: 20%; Particle diameter is the electrosmelted magnesite clinker of 1～3mm: 25%; Particle diameter is less than 1mm and greater than 325 purpose dolomite sands: 20%; Particle diameter is 325 purpose dolomite sands: 20%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 15%.
Feed particles grating and quality percentage composition thereof that first transition layer 2 adopts are: particle diameter is the Natural manganese dioxide hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering magnesium powder: 40%.
Feed particles grating and quality percentage composition thereof that second transition layer 3 adopts are: particle diameter is the electric melting magnesium-aluminium chromium hollow ball of 0.2～5mm: 70%; Particle diameter is 325 purpose electric smelting spinel powders: 30%.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 4 adopts are: particle diameter is greater than 325 purpose alumina hollow balls: 35%; Particle diameter is greater than 325 purpose aluminium titanium hollow balls: 20%; Particle diameter is 325 purpose lapis amiridiss: 45%.
The preparation method of the calcareous four layers of composite brick of above-mentioned magnesium may further comprise the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 30 minutes;
B: light heat insulation layer is got the raw materials ready: alumina hollow ball, aluminium titanium hollow ball are mixed with wedding agent in proportion, add lapis amiridis then in proportion, stir 30 minutes subsequent use;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 30 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 30 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into four layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, first transition layer, second transition layer and light heat insulation layer is 1:0.3:0.2:1; After adding the material that is prepared in every layer, extract dividing plate out, the employing machine is pressed extrusion forming;
F: burn till: the base substrate after the moulding is taken out after 80 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Used wedding agent is a liquid paraffin in above-mentioned A～D step; Wherein the weight of used liquid paraffin is 3% of heavy working lining weight in the A step; The weight of used liquid paraffin is 6% of light heat insulation layer weight in the B step; The weight of used liquid paraffin is 3% of the first transition layer weight in the C step, and the weight of used liquid paraffin is 2% of the second transition layer weight in the D step.
Claims (6)
1. calcareous four layers of composite brick of magnesium; It is characterized in that stacking gradually from the bottom to top with the magnesium calcareous material is the heavy working lining of feedstock production; With the magnesian is first transition layer of feedstock production; With spinel or magnalium chromium or magnalium titanium or magnesia spinel zirconium material is second transition layer of feedstock production, is the light heat insulation layer of feedstock production with the electric smelting hollow ball.
2. the calcareous four layers of composite brick of magnesium according to claim 1 is characterized in that said heavy working lining comprises the MgO that accounts for gross weight 80～87% at least, accounts for the CaO of gross weight 6～20%.
3. the calcareous four layers of composite brick of magnesium according to claim 1 is characterized in that electric smelting hollow ball in the said light heat insulation layer is one or more the combination in alumina hollow ball, corundum bollow ball, aluminium calcium hollow ball, aluminium titanium hollow ball, chromium corundum hollow ball, zircon corundum hollow ball, magnalium hollow ball, magnalium calcium hollow ball, magnesium calcium hollow ball, magnesium chromium hollow ball, magnesium titanium hollow ball, the Natural manganese dioxide hollow ball; Said alumina hollow ball contains the Al that accounts for gross weight 98% at least
2O
3Said corundum bollow ball contains the Al that accounts for gross weight 93% at least
2O
3Said aluminium calcium hollow ball contains the Al that accounts for gross weight 0.1～99.9%
2O
3, and contain the CaO that accounts for gross weight 0.1～99.9%; Said aluminium titanium hollow ball contains the Al that accounts for gross weight 40～99.9%
2O
3, and contain the TiO that accounts for gross weight 0.1～60%
2Said chromium corundum hollow ball contains the Al that accounts for gross weight 70～99.9%
2O
3, and contain the Cr that accounts for gross weight 0.1～30%
2O
3Said zircon corundum hollow ball contains the Al that accounts for gross weight 90～99.9%
2O
3, and contain the ZrO that accounts for gross weight 0.1～10%
2Said magnalium hollow ball contains the Al that accounts for gross weight 0.1～99.9%
2O
3, and contain the MgO that accounts for gross weight 0.1～99.9%; Said magnalium calcium hollow ball contains the CaO that accounts for gross weight 0.01～99.9%, and contains the Al that accounts for gross weight 0.01～99.9%
2O
3, and contain the MgO that accounts for gross weight 0.01～99.9%; Said magnesium calcium hollow ball contains the CaO that accounts for gross weight 0.1～99.9%, and contains the MgO that accounts for gross weight 0.01～99.9%; Said magnesium chromium hollow ball contains the MgO that accounts for gross weight 70～99.9%, and contains the Cr that accounts for gross weight 0.1～30%
2O
3Said magnesium titanium hollow ball contains and accounts for gross weight 90～99.9%MgO, and contains the TiO that accounts for gross weight 0.1～10%
2Said Natural manganese dioxide hollow ball contains the MgO that accounts for gross weight 95% at least.
4. according to claim 1 or the calcareous four layers of composite brick of 2 or 3 described magnesium, it is characterized in that described first transition layer and second transition layer are raw materials used to form, or form by hollow ball and fine powder by particle and fine powder.
5. the preparation method of the calcareous four layers of composite brick of magnesium according to claim 1 is characterized in that comprising the steps:
A: the heavy working lining is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and greater than 325 purpose particless of aggregates; Then powder being prepared the back in proportion mixes in ball mill; Again particles of aggregates and wedding agent are mixed the powder that the back adding mixes, stir subsequent use after 10～30 minutes;
B: light heat insulation layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
C: first transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
D: second transition layer is got the raw materials ready: earlier with raw material screening for being not more than 325 purpose powders and, particles of aggregates being mixed with wedding agent in proportion greater than 325 purpose particless of aggregates, it is subsequent use to add powder stirring 10～30 minutes then in proportion;
E: moulding: accomplish after the getting the raw materials ready of each layer, be divided into four layers to the material chamber of forming mould with dividing plate, after adding the material that is prepared in every layer, extract dividing plate out, adopt vibrations pressurization or mechanical pressing according to size;
F: burn till: the base substrate after the moulding is taken out after 80～150 ℃ of oven dry, and loading of kiln was burnt till in 1600～1700 ℃ of insulations in 3～8 hours.
6. the preparation method of the calcareous four layers of composite brick of magnesium according to claim 5 is characterized in that said wedding agent is a liquid paraffin.
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| CN 201210079224 CN102603333B (en) | 2012-03-23 | 2012-03-23 | Magnesia-calcia four-layer composite brick and preparation method thereof |
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| CN 201210079224 CN102603333B (en) | 2012-03-23 | 2012-03-23 | Magnesia-calcia four-layer composite brick and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08338689A (en) * | 1995-06-13 | 1996-12-24 | Nippon Cement Co Ltd | Rotary kiln |
| CN101285652A (en) * | 2008-05-30 | 2008-10-15 | 邯郸新兴重型机械有限公司 | Energy-saving brick |
| CN101857451A (en) * | 2010-06-07 | 2010-10-13 | 浙江大学 | Heat-insulating integrated composite brick with alkaline structure and preparation method thereof |
-
2012
- 2012-03-23 CN CN 201210079224 patent/CN102603333B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08338689A (en) * | 1995-06-13 | 1996-12-24 | Nippon Cement Co Ltd | Rotary kiln |
| CN101285652A (en) * | 2008-05-30 | 2008-10-15 | 邯郸新兴重型机械有限公司 | Energy-saving brick |
| CN101857451A (en) * | 2010-06-07 | 2010-10-13 | 浙江大学 | Heat-insulating integrated composite brick with alkaline structure and preparation method thereof |
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| CN102603333B (en) | 2013-12-25 |
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