CN102627461A - Magnesium aluminum spinel three-layer composite brick and its preparation method - Google Patents
Magnesium aluminum spinel three-layer composite brick and its preparation method Download PDFInfo
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- CN102627461A CN102627461A CN2012100792069A CN201210079206A CN102627461A CN 102627461 A CN102627461 A CN 102627461A CN 2012100792069 A CN2012100792069 A CN 2012100792069A CN 201210079206 A CN201210079206 A CN 201210079206A CN 102627461 A CN102627461 A CN 102627461A
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Abstract
The invention puts forward a magnesium aluminum spinel three-layer composite brick with good wear resistance, high refractoriness, great structural strength as well as good thermal insulating performance, and its preparation method. The composite brick realizes the integrated fireproof and thermal insulating functions of composite bricks, and improves the energy saving effects of rotary kilns. The magnesium aluminum spinel three-layer composite brick of the invention comprises a heavy working layer prepared from a magnesium aluminum spinel material, a lightweight thermal insulating layer prepared from fused hollow balls, and a transition layer located between the heavy working layer and the lightweight thermal insulating layer and prepared from spinels or magnesium-aluminum-chromium or magnesium-aluminum-titanium or magnesium-spinel-zirconium. The magnesium aluminum spinel three-layer composite brick provided in the invention introduces the transition layer, and can avoid reaction between the heavy working layer and the lightweight thermal insulating layer, so that the product can have good fireproof and thermal insulating effects without reducing the service life of materials, thus playing a role in saving energy consumption, lowering material consumption and reducing refractory material consumption of rotary kilns, and effectively prolonging the service life of equipment.
Description
Technical field
The invention belongs to and belong to technical field of refractory materials, specifically, relate to three layers of composite brick of a kind of magnesium-aluminium spinel 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 three layers of composite brick of the good magnesium-aluminium spinel 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.
Three layers of composite brick of magnesium-aluminium spinel of the present invention comprise with the dimension stone of magnesia alumina spinel being the heavy working lining of feedstock production, be the transition layer between light heat insulation layer, heavy working lining and the light heat insulation layer of feedstock production with the electric smelting hollow ball, said transition layer is that feedstock production forms with spinel or magnalium chromium or magnalium titanium or magnesia spinel zirconium.
Above-mentioned heavy working lining fire-resistant effective, the good heat-insulation effect of light heat insulation layer, and transition layer can play transitional function, avoids heavy working lining and light heat insulation layer to produce reaction, influences 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% at least, accounts for the Al of gross weight 5% at least
2O
3Other 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 transition layer is 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 three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer, be divided into three 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;
E: 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.
Above-mentioned wedding agent is one or more in Adlerika, phosphoric acid solution, lignin sulfonic acid salts solution, phosphate dihydrogen aluminum solution, magnesium chloride solution, yellow starch gum solution, aluminum phosphate solution, aluminium glue, trimagnesium phosphate solution, the alum liquor, and different step can adopt identical or different wedding agent.
Three layers of composite brick of magnesium-aluminium spinel 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 three layers of composite brick of magnesium-aluminium spinel 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, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the magnesite clinker of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose magnesite clinkers: 25%; Particle diameter is 325 purpose magnesite clinkers: 21%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is an Adlerika, and its weight is 5% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is greater than the sintering spinel of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose sintering spinels: 25%; Particle diameter is 325 purpose sintering spinel powders: 30%.The wedding agent that is adopted when getting the raw materials ready is an Adlerika, and its weight is 3% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 adopts are: particle diameter is greater than 325 purpose corundum bollow balls: 55%; Particle diameter is 325 purpose spinel micro mists: 45%.The wedding agent that is adopted when getting the raw materials ready is a phosphoric acid solution, and its weight is 6% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.2:1; 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 150 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Embodiment 2:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 35%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 17%; Particle diameter is less than 1mm and greater than 325 purpose electric smelting spinels: 13%; Particle diameter is 325 purpose electric molten magnesite powder: 30%; Particle diameter is 325 purpose electric smelting spinels: 5%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 3% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is greater than the electric smelting spinel of 1mm: 50%; Particle diameter is less than 1mm and greater than 325 purpose electric smelting spinels: 20%; Particle diameter is 325 purpose electric smelting spinel powders: 30%.The wedding agent that is adopted when getting the raw materials ready is an Adlerika, and its weight is 2% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is a phosphate dihydrogen aluminum solution, and its weight is 6% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.3:1; 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 80 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Embodiment 3:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 30%; Particle diameter is 325 purpose electric molten magnesite powder: 16%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is a magnesium chloride solution, and its weight is 4% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is the sintering spinel hollow ball of 0.2～5mm: 55%; Particle diameter is 325 purpose sintering spinel powders: 45%.The wedding agent that is adopted when getting the raw materials ready is a yellow starch gum solution, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is an aluminum phosphate solution, and its weight is 5% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.5:1; 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 1600 ℃ of insulations in 5 hours.
Embodiment 4:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the magnesite clinker of 1mm: 40%; Particle diameter is less than 1mm and greater than 325 purpose magnesite clinkers: 35%; Particle diameter is 325 purpose magnesite clinkers: 16%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 2% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is the electric smelting spinel hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering spinel powders: 40%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is an aluminium glue, and its weight is 5% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.5:1; 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 1600 ℃ of insulations in 4 hours.
Embodiment 5:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 30%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 16%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is a trimagnesium phosphate solution, and its weight is 3% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is the electric smelting spinel hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering spinel powders: 40%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is an alum liquor, and its weight is 5% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.5:1; 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 1600 ℃ of insulations in 5 hours.
Embodiment 6:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the magnesite clinker of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose magnesite clinkers: 25%; Particle diameter is 325 purpose sintering magnesium powder: 21%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is an Adlerika, and its weight is 5% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is the magnalium chromium hollow ball of 0.2～5mm: 55%; Particle diameter is 325 purpose sintering spinel powders: 45%.The wedding agent that is adopted when getting the raw materials ready is an Adlerika, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 adopts are: particle diameter is greater than 325 purpose corundum bollow balls: 55%; Particle diameter is 325 purpose spinel micro mists: 45%.The wedding agent that is adopted when getting the raw materials ready is a phosphoric acid solution, and its weight is 6% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.2:1; 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 150 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Embodiment 7:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 35%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 17%; Particle diameter is less than 1mm and greater than 325 purpose electric smelting spinels: 13%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 30%; Particle diameter is 325 purpose electric smelting spinels: 5%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 3% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 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%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is a phosphate dihydrogen aluminum solution, and its weight is 6% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.3:1; 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 80 ℃ of oven dry, and loading of kiln was burnt till in 1700 ℃ of insulations in 3 hours.
Embodiment 8:
As shown in Figure 1, three layers of composite brick of the magnesium-aluminium spinel of present embodiment comprise the transition layer 2 between heavy working lining 1, light heat insulation layer 3, heavy working lining 1 and the light heat insulation layer 3.
Wherein:
Feed particles grating and quality percentage composition thereof that heavy working lining 1 adopts are: particle diameter is greater than the electrosmelted magnesite clinker of 1mm: 45%; Particle diameter is less than 1mm and greater than 325 purpose electrosmelted magnesite clinkers: 30%; Particle diameter is 325 purpose electrosmelted magnesite clinkers: 16%; Particle diameter is 325 purpose electric smelting spinels: 9%.The wedding agent that is adopted when getting the raw materials ready is a magnesium chloride solution, and its weight is 4% of heavy working lining weight.
Feed particles grating and quality percentage composition thereof that transition layer 2 adopts are: particle diameter is the electric molten magnesite Zirconium spinel hollow ball of 0.2～5mm: 60%; Particle diameter is 325 purpose sintering spinel powders: 40%.The wedding agent that is adopted when getting the raw materials ready is the lignin sulfonic acid salts solution, and its weight is 5% of transition layer weight.
Feed particles grating and quality percentage composition thereof that light heat insulation layer 3 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 wedding agent that is adopted when getting the raw materials ready is an aluminum phosphate solution, and its weight is 5% of light heat insulation layer weight.
The preparation method of three layers of composite brick of above-mentioned magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer; Be divided into three layers to the material chamber of forming mould according to size with dividing plate; Wherein the height dimension ratio of heavy working lining, transition layer and light heat insulation layer is 1:0.5:1; 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 1600 ℃ of insulations in 5 hours.
Claims (6)
1. three layers of composite brick of a magnesium-aluminium spinel; It is characterized in that comprising with the dimension stone of magnesia alumina spinel to be the heavy working lining of feedstock production, be the transition layer between light heat insulation layer, heavy working lining and the light heat insulation layer of feedstock production with the electric smelting hollow ball, said transition layer is that feedstock production forms with spinel or magnalium chromium or magnalium titanium or magnesia spinel zirconium.
2. three layers of composite brick of magnesium-aluminium spinel according to claim 1 is characterized in that said heavy working lining comprises the MgO that accounts for gross weight 80% at least, accounts for the Al of gross weight 5% at least
2O
3
3. three layers of composite brick of magnesium-aluminium spinel 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 three layers of composite brick of 2 or 3 described magnesium-aluminium spinels, it is characterized in that said transition layer is raw materials used to form, or form by hollow ball and fine powder by particle and fine powder.
5. the preparation method of three layers of composite brick of magnesium-aluminium spinel 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: 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: moulding: accomplish after the getting the raw materials ready of each layer, be divided into three 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;
E: 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 three layers of composite brick of magnesium-aluminium spinel according to claim 5; It is characterized in that said wedding agent is one or more in Adlerika, phosphoric acid solution, lignin sulfonic acid salts solution, phosphate dihydrogen aluminum solution, magnesium chloride solution, yellow starch gum solution, aluminum phosphate solution, aluminium glue, trimagnesium phosphate solution, the alum liquor, and different step can adopt identical or different wedding agent.
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| CN103449822A (en) * | 2012-06-05 | 2013-12-18 | 苏州罗卡节能科技有限公司 | Three-layer composite brick and preparation method thereof |
| CN112552058A (en) * | 2020-11-30 | 2021-03-26 | 邯郸市翰润达耐火材料有限公司 | Sintering casting magnesium-aluminum-zirconium-chromium sliding plate and preparation method thereof |
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Application publication date: 20120808 Assignee: Changxin Shang Shang Technology Co., Ltd. Assignor: Suzhou Low Carbon Energy Saving Technology Co., Ltd. Contract record no.: 2016990000232 Denomination of invention: Magnesium aluminum spinel three-layer composite brick and its preparation method Granted publication date: 20131211 License type: Common License Record date: 20160614 |
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