CN104725058B - Periclase-magnesium ferrum hercynite/forsterite composite brick - Google Patents
Periclase-magnesium ferrum hercynite/forsterite composite brick Download PDFInfo
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Abstract
The invention discloses a kind of periclase-magnesium ferrum hercynite/forsterite composite brick, it is composited by working lining and thermal insulation layer, working lining is with magnesium iron sand, hercynite sand, fused magnesite for primary raw material, thermal insulation layer, with middle heavy synthesizing olivine sand, middle lightweight synthetic forsterite sand, magnesite granule, magnesia powder, rice hull ash for primary raw material, through dispensing, mixing, molding, dries, the step such as burns till and prepare.The working lining erosion resistance of composite brick of the present invention is strong, good thermal shock stability, to be prone to stick kliner coating, heat conductivity low, thermal insulation layer has good high volume stability, higher mechanical strength and relatively low heat conductivity, therefore, it is thermal zone that this composite brick may be used for cement rotary kiln, and long service life, kiln body radiation loss can be significantly reduced, there is good effects of energy saving and emission reduction.
Description
Technical field
The present invention relates to fire resisting material field, be specifically related to a kind of periclase-magnesium ferrum hercynite/forsterite composite brick.
Background technology
Cement production industry is famous big power consumer, is also the rich and influential family of discharge carbon dioxide.At present, the positive planned development second filial generation new dry cement production technology of China, clinker production technology heat consumption is reduced to 650kcal/kg from 700～750kcal/kg, namely reduces heat consumption 50～100kcal/kg.In cement production process, the heat consumption that surface radiating causes accounts for the 10% of total production technology heat consumption, for 70kcal/kg；And the heat consumption that kiln body heat radiation causes in surface radiating heat consumption accounts for 50%, kiln tail preheater, dore furnace account for 35%, and tertiary-air pipe, cooler account for 15%.Therefore, if the heat consumption that the surface radiating that can reduce in cement production process causes, can be just that very big contribution is made in the energy-saving and emission-reduction of cement industry.The top priority reducing surface radiating heat consumption reduces cement rotary kiln body heat radiation exactly, especially reduces the radiation loss of cement kiln clinkering zone, intermediate zone.
At present, the refractory brick that cement kiln clinkering zone uses is mainly periclase-magnesium ferrum/hercynite brick (being called for short magnesium grey iron block), and its heat conductivity is about 3.0W/mk；Intermediate zone also has a small amount of user magnesite-Mg-Al spinel brick (abbreviation magnesia-alumina brick), and its heat conductivity is about 3.5W/mk；From heat conductivity, no matter being magnesium grey iron block or magnesia-alumina brick, heat conductivity is all higher, and in actually used process, energy-saving effect is not notable.Application number is 201210183879.9, name is called a kind of Pleonaste heat-insulation composite brick of the patent disclosure of " Pleonaste heat-insulation composite brick ", this composite brick mainly uses highly-purity magnesite/fused magnesite and synthesis ferro-magnesium-aluminum spinelle as the major ingredient of flame retardant coating, with olivine as thermal insulation layer major ingredient；But magnesia is the material of a kind of high heat conduction, working lining (flame retardant coating) adopts highly-purity magnesite/fused magnesite to make raw material, to greatly increase the heat conductivity of material, offset the energy-saving effect that thermal insulation layer brings, the primary raw material olivine of thermal insulation layer belongs to heavy olivine simultaneously, its heat conductivity is also higher, only by the heat conductivity adding some pore creating materials (sawdust/poly-light ball) in substrate and can not effectively reducing material, therefore, this composite brick effect of heat insulation is poor, cement rotary kiln clinkering zone energy-saving effect for having kliner coating is not notable, and service life is short, fail to be widely applied.A kind of accordingly, it would be desirable to develop there is better performance may be used for the composite brick that cement rotary kiln is thermal zone.
Summary of the invention
For problems of the prior art, the present invention provides a kind of periclase-magnesium ferrum hercynite/forsterite composite brick, the working lining erosion resistance of this composite brick is strong, good thermal shock stability, to be prone to stick kliner coating, heat conductivity low, thermal insulation layer has good high volume stability, higher mechanical strength and relatively low heat conductivity, therefore, it is thermal zone that this composite brick may be used for cement rotary kiln, and long service life, kiln body radiation loss can be significantly reduced, there is good effects of energy saving and emission reduction.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of periclase-magnesium ferrum hercynite/forsterite composite brick, it is composited by working lining and thermal insulation layer, the raw material of described working lining consists of: granularity is the magnesium iron sand 10～20wt% of 3-5mm, granularity is the magnesium iron sand 15～25wt% of 1-3mm, granularity is the hercynite sand 5～15wt% of 1-2mm, granularity is the magnesium iron sand 5～15wt% of 0.088-1mm, granularity is the hercynite sand 5～15wt% of 0.088-1mm, the fused magnesite micropowder 5～10wt% of the magnesium iron sand fine powder 20～35wt% and granularity < 0.020mm of granularity < 0.088mm, the bonding agent of the additional water reducer accounting for described working lining raw material gross weight 0.03～0.1wt% and 4～6wt%；nullThe raw material of described thermal insulation layer consists of: granularity is the middle heavy synthetic forsterite sand 10～20wt% of 3-5mm、Granularity is the middle heavy synthetic forsterite sand 18～28wt% of 1-3mm、Granularity is the middle lightweight synthetic forsterite sand 10～20wt% of 1-2mm、Granularity is the middle heavy synthetic forsterite sand 4～15wt% of 0.088-1mm、Granularity is the magnesite granule 4～10wt% of 0.088-0.5mm、Granularity < 0.088mm is ground, by middle matter synthetic forsterite sand, the fine powder 17～20wt% obtained、Magnesia powder 4～the 10wt% and rice hull ash 3～7wt% of granularity < 0.088mm，The bonding agent of the additional polystyrene spheres accounting for described thermal insulation layer raw material gross weight 0～2wt% granularity < 1mm and 5～10wt%.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, described middle heavy synthetic forsterite sand or middle lightweight synthetic forsterite sand are that one has high intensity, low thermal conductivity (0.8～1.2W/mk), middle matter forsterite refractory that high temperature lower volume is stable, wherein, the bulk density A of described middle heavy synthetic forsterite sand1It is 2.3≤A1≤2.6g/cm3；The bulk density A of described middle lightweight synthetic forsterite sand2It is 1.8≤A2< 2.3g/cm3；Described middle matter synthetic forsterite sand is the mixture of middle heavy synthetic forsterite sand, middle lightweight synthetic forsterite sand either or both of which, and its bulk density A is 1.8≤A≤2.6g/cm3。
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, the preparation method of described middle heavy synthetic forsterite sand or middle lightweight synthetic forsterite sand is:
(1) by the magnesite tailings particles of 85～93wt% granularity < 0.2mm at 1200～1350 DEG C light-burned 0.5～5 hour, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 7～15wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；
(2) heavy synthetic forsterite sand in a. preparation: add the bonding agent of pore former sum in the compound that step (1) obtains, it is M that the addition of pore former accounts for the ratio of compound gross weight, 5wt%≤M≤25wt%, the addition of bonding agent is 3～12wt% of compound gross weight, then carry out mixing, mixing, 110～150MPa pressure machine pressure, dried, dried roasting 4～9 hours at 1650～1720 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite；
B. middle lightweight synthetic forsterite sand is prepared: in the compound that step (1) obtains, add the bonding agent of pore former sum, it is N that the addition of pore former accounts for the ratio of compound gross weight, 25wt% < N≤40wt%, the addition of bonding agent is 3～12wt% of compound gross weight, then carry out mixing, mixing, 110～150MPa pressure machine pressure, dried, dried roasting 4～9 hours at 1650～1720 DEG C, obtain middle lightweight synthetic forsterite, namely obtain middle lightweight synthetic forsterite sand by broken for middle lightweight synthetic forsterite.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, described pore former is granularity is the magnesite granule of 0.088-0.5mm.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, the chemical composition of described magnesium iron sand is: MgO85～97wt%, Fe2O32～14wt%, surplus are impurity.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, described bonding agent is lignosulfonic acid magnesium solution.
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, the concentration of described lignosulfonic acid magnesium solution is 1.05～1.25g/cm3。
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, the concentration of described lignosulfonic acid magnesium solution is 1.15g/cm3。
According to above-mentioned periclase-magnesium ferrum hercynite/forsterite composite brick, the preparation method of described composite brick comprises the following steps:
(1) preparation work layer brickmaking material: prepare each raw material by working lining raw material composition, after mix homogeneously, add water reducer and bonding agent, mixing to uniform with edge runner-wet mill；
(2) thermal insulation layer brickmaking material is prepared: prepare each raw material by thermal insulation layer raw material composition, after mix homogeneously, add polystyrene spheres and bonding agent, mixing to uniform with edge runner-wet mill；
(3) molding, burn till: with demarcation strip bricks die separated and be divided into hot junction and cold end two parts, working lining brickmaking material is added in hot junction, thermal insulation layer brickmaking material is added at cold end, then pull out demarcation strip, it is pressed into adobe with friction press, by adobe 100～120 DEG C dry 20～26 hours in dry kiln, then fire 5～8 hours at 1500～1600 DEG C, kiln discharge.
The positive beneficial effect of the present invention:
(1) composite brick working lining of the present invention adopts magnesium iron sand to substitute magnesia as primary raw material, significantly reduces radiant heat transfer under hot conditions, improves the heat-proof quality of working lining；The space in coarse aggregate, fine aggregate and fine powder stacking volume filled by the fused magnesite micropowder simultaneously adopting granularity < 0.020mm, and coordinate water reducer use to effectively reduce apparent porosity, improve the erosion resisting of working lining, both solved because strengthening temperature field in working lining thermal insulation change brick, cause the problem corroding layer expansion and damage its corrosion resistance, be possible to prevent again to use ordinary sinter magnesia micropowder aquation to make adobe ftracture simultaneously.
(2) composite brick of the present invention thermal insulation layer adopt have high intensity, low heat conductivity middle matter synthetic forsterite sand substitute high intensity, high-termal conductivity olivine as major ingredient, add some particulates and pore creating material simultaneously, solve the contradiction between composite brick thermal insulation layer high intensity and low heat conductivity energy, improve composite brick thermal insulation layer intensity/thermal conductivity ratio, under the premise not affecting thermal insulation layer intensity, further increase its thermal insulation.
(3) composite brick of the present invention adopts lignosulfonic acid magnesium solution to replace traditional bonding agent lignosulfonic acid calcium solution, can avoid formation eutectic material (CaO MgO SiO in composite brick sintering process2), play the effect of high temperature resistant, the erosion-resisting characteristics improving working layer, insulating layer material can also be reduced simultaneously and burn till contraction, improve the qualification rate of composite brick finished product.
(4) the working lining erosion resistance of composite brick of the present invention is strong, good thermal shock stability, be prone to stick kliner coating, heat conductivity is low, refractoriness under load is low；Thermal insulation layer has good high volume stability, higher mechanical strength and relatively low heat conductivity, this composite brick integrates fire-resistant with heat insulating function, effectively compensate for magnoferrite composite brick, the shortcoming that magnesium aluminate spinel composite brick thermal conductivity is high, therefore, may be used for cement rotary kiln thermal zone, and long service life, kiln body radiation loss can be significantly reduced, there is good effects of energy saving and emission reduction；And production cost is relatively low, there is good economic and social benefit, it is possible to popularization and application.
(5) performance comparison (see table 1) of the composite brick of the present invention and Pleonaste heat-insulation composite brick of the prior art (application number: 201210183879.9).As shown in Table 1, the composite brick working lining of the present invention and heat conductivity respectively 2.5～2.6W/mk and the 0.8～1.1W/mk of thermal insulation layer, there is obvious reduction compared with Pleonaste heat-insulation composite brick, significantly improved comprehensive effect of heat insulation；Meanwhile, working lining apparent porosity has been reduced to 12～13%, improves its corrosion resistance.
The composite brick of table 1 present invention and the performance comparison of existing Pleonaste heat-insulation composite brick
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but the present invention is not limited to these embodiments.
Embodiment 1～6:
The raw material composition of periclase-magnesium ferrum hercynite/forsterite composite brick working lining and thermal insulation layer in table 2 embodiment 1～6
Note: 1) concentration of lignosulfonic acid magnesium solution described in embodiment 1 and 2 is 1.05g/cm3, the chemical composition of described magnesium iron sand is: MgO85wt%, Fe2O314wt%, surplus are impurity, and described middle matter synthetic forsterite sand refers to middle heavy synthetic forsterite sand；2) concentration of lignosulfonic acid magnesium solution described in embodiment 3 is 1.25g/cm3, the chemical composition of described magnesium iron sand is: MgO90wt%, Fe2O38wt%, surplus are impurity, and described middle matter synthetic forsterite sand refers to middle lightweight synthetic forsterite sand；3) described in embodiment 4 and 5, the concentration of lignosulfonic acid magnesium solution is 1.15g/cm3, the chemical composition of described magnesium iron sand is: MgO85wt%, Fe2O310wt%, surplus are impurity, and described middle matter synthetic forsterite sand refers to middle heavy synthetic forsterite sand and the mixture of middle lightweight synthetic forsterite sand；4) concentration of lignosulfonic acid magnesium solution described in embodiment 6 is 1.15g/cm3, the chemical composition of described magnesium iron sand is: MgO97wt%, Fe2O32wt%, surplus are impurity, and described middle matter synthetic forsterite sand refers to middle lightweight synthetic forsterite sand.
Embodiment 7:
One of preparation method of periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described, comprise the following steps: (1) preparation work layer brickmaking material: prepare each raw material by working lining raw material composition, after mix homogeneously, add water reducer and bonding agent, mixing to uniform with edge runner-wet mill；(2) thermal insulation layer brickmaking material is prepared: prepare each raw material by thermal insulation layer raw material composition, after mix homogeneously, add polystyrene spheres and bonding agent, mixing to uniform with edge runner-wet mill；(3) molding, burn till: with demarcation strip bricks die separated and be divided into hot junction and cold end two parts, working lining brickmaking material is added in hot junction, thermal insulation layer brickmaking material is added at cold end, then pull out demarcation strip, it is pressed into adobe with friction press, by adobe 100 DEG C dry 26 hours in dry kiln, then fire 5 hours at 1600 DEG C, kiln discharge.
Embodiment 8:
The two of the preparation method of periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described are substantially the same manner as Example 7, it is different in that: after making adobe, by adobe 120 DEG C dry 20 hours in dry kiln, then 8 hours are fired at 1500 DEG C, kiln discharge.
Embodiment 9:
The three of the preparation method of periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described are substantially the same manner as Example 7, it is different in that: after making adobe, by adobe 110 DEG C dry 24 hours in dry kiln, then 7 hours are fired at 1550 DEG C, kiln discharge.
Embodiment 10:
The four of the preparation method of periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described are substantially the same manner as Example 7, it is different in that: after making adobe, by adobe 110 DEG C dry 20 hours in dry kiln, then 5 hours are fired at 1500 DEG C, kiln discharge.
The performance test results of the composite brick that the embodiment of the present invention 1～6 prepares is in Table 3.
The composite brick performance parameter testing result that table 3 embodiment 1～6 prepares
(1) in periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described:
One of preparation method of described middle heavy synthetic forsterite sand is: (1) was by the magnesite tailings particles of 93wt% granularity < 0.2mm at 1350 DEG C light-burned 0.5 hour, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 7wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) in above-mentioned compound, addition accounts for the magnesite granule that granularity is 0.088-0.5mm of compound gross weight 5wt% and the lignosulfonic acid magnesium solution of 3wt%, carry out mixing, mixing, 150MPa pressure machine pressure, dried, dried roasting 9 hours at 1720 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite.
Wherein, described magnesite tailings particles is the material that Brick With Magnesite Purified By Flotation stone extracts that high-purity Ore is left over, and its main chemical compositions is: MgO40.7%, SiO219.4%, CaO0.7%, Al2O34.5%, Fe2O30.8%, KCl0.7%, loss on ignition 33.2%.
The preparation method of described middle lightweight synthetic forsterite sand is essentially identical with middle heavy synthetic forsterite sand, the addition being specifically different in that the magnesite granule that pore former particle size is 0.088-0.5mm is 26wt%, and the addition of bonding agent lignosulfonic acid magnesium solution is 6wt%.
(2) in periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described:
The two of the preparation method of described middle heavy synthetic forsterite sand are: (1) was by the magnesite tailings particles of 91wt% granularity < 0.2mm at 1300 DEG C light-burned 1 hour, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 9wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) in above-mentioned compound, addition accounts for the magnesite granule that granularity is 0.088-0.5mm of compound gross weight 10wt% and the lignosulfonic acid magnesium solution of 6wt%, carry out mixing, mixing, 140MPa pressure machine pressure, dried, dried roasting 8 hours at 1700 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite.
Wherein, the main chemical compositions of described magnesite tailings particles is: MgO40.7%, SiO219.4%, CaO0.7%, Al2O34.5%, Fe2O30.8%, KCl0.7%, loss on ignition 33.2%.
The preparation method of described middle lightweight synthetic forsterite sand is essentially identical with middle heavy synthetic forsterite sand, the addition being specifically different in that the magnesite granule that pore former particle size is 0.088-0.5mm is 30wt%, and the addition of bonding agent lignosulfonic acid magnesium solution is 8wt%.
(3) in periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described:
The three of the preparation method of described middle heavy synthetic forsterite sand are: (1) was by the magnesite tailings particles of 85wt% granularity < 0.2mm at 1200 DEG C light-burned 5 hours, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 15wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) in above-mentioned compound, addition accounts for the magnesite granule that granularity is 0.088-0.5mm of compound gross weight 15wt% and the lignosulfonic acid magnesium solution of 10wt%, carry out mixing, mixing, 110MPa pressure machine pressure, dried, dried roasting 4 hours at 1650 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite.
Wherein, described magnesite tailings particles is the material that Brick With Magnesite Purified By Flotation stone extracts that high-purity Ore is left over, and its main chemical compositions is: MgO40.6%, SiO217.6%, CaO0.8%, Al2O33.5%, Fe2O31.0%, KCl0.6%, loss on ignition 35.9%.
The preparation method of described middle lightweight synthetic forsterite sand is essentially identical with middle heavy synthetic forsterite sand, the addition being specifically different in that the magnesite granule that pore former particle size is 0.088-0.5mm is 40wt%, and the addition of bonding agent lignosulfonic acid magnesium solution is 12wt%.
(4) in periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described:
The four of the preparation method of described middle heavy synthetic forsterite sand are: (1) was by the magnesite tailings particles of 90wt% granularity < 0.2mm at 1280 DEG C light-burned 3 hours, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 10wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) in above-mentioned compound, addition accounts for the magnesite granule that granularity is 0.088-0.5mm of compound gross weight 20wt% and the lignosulfonic acid magnesium solution of 8wt%, carry out mixing, mixing, 130MPa pressure machine pressure, dried, dried roasting 6 hours at 1680 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite.
Wherein, the main chemical compositions of described magnesite tailings particles is: MgO40.5%, SiO215.8%, CaO1.0%, Al2O32.5%, Fe2O31.2%, KCl0.4%, loss on ignition 38.6%.
The preparation method of described middle lightweight synthetic forsterite sand is essentially identical with middle heavy synthetic forsterite sand, the addition being specifically different in that the magnesite granule that pore former particle size is 0.088-0.5mm is 35wt%, and the addition of bonding agent lignosulfonic acid magnesium solution is 12wt%.
(5) in periclase-magnesium ferrum hercynite/forsterite composite brick that one of above-described embodiment 1～6 is arbitrarily described:
The five of the preparation method of described middle heavy synthetic forsterite sand are: (1) was by the magnesite tailings particles of 88wt% granularity < 0.2mm at 1250 DEG C light-burned 4 hours, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 12wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) in above-mentioned compound, addition accounts for the magnesite granule that granularity is 0.088-0.5mm of compound gross weight 25wt% and the lignosulfonic acid magnesium solution of 10wt%, carry out mixing, mixing, 120MPa pressure machine pressure, dried, dried roasting 5 hours at 1670 DEG C, obtain middle heavy synthetic forsterite, namely obtain middle heavy synthetic forsterite sand by broken for middle heavy synthetic forsterite.
Wherein, described magnesite tailings particles is the material that Brick With Magnesite Purified By Flotation stone extracts that high-purity Ore is left over, and its main chemical compositions is: MgO40.5%, SiO215.8%, CaO1.0%, Al2O32.5%, Fe2O31.2%, KCl0.4%, loss on ignition 38.6%.
The preparation method of described middle lightweight synthetic forsterite sand is essentially identical with middle heavy synthetic forsterite sand, is specifically different in that the addition of the magnesite granule that pore former particle size is 0.088-0.5mm is 30wt%.
The invention is not limited in above-mentioned detailed description of the invention, those skilled in the art also can make multiple change accordingly, but any change equivalent or similar with the present invention all should be contained within the scope of the claims.
Claims (9)
- null1. periclase-magnesium ferrum hercynite/forsterite composite brick，It is composited by working lining and thermal insulation layer，It is characterized in that: the raw material of described working lining consists of: granularity is the magnesium iron sand 10～20wt% of 3-5mm、Granularity is the magnesium iron sand 15～25wt% of 1-3mm、Granularity is the hercynite sand 5～15wt% of 1-2mm、Granularity is the magnesium iron sand 5～15wt% of 0.088-1mm、Granularity is the hercynite sand 5～15wt% of 0.088-1mm、The fused magnesite micropowder 5～10wt% of the magnesium iron sand fine powder 20～35wt% and granularity < 0.020mm of granularity < 0.088mm，The bonding agent of the additional water reducer accounting for described working lining raw material gross weight 0.03～0.1wt% and 4～6wt%；The raw material of described thermal insulation layer consists of: granularity is 3-5mm bulk density is A1Synthetic forsterite sand 10～20wt%, granularity be 1-3mm bulk density be A1Synthetic forsterite sand 18～28wt%, granularity be 1-2mm bulk density be A2Synthetic forsterite sand 10～20wt%, granularity be 0.088-1mm bulk density be A1Synthetic forsterite sand 4～15wt%, granularity be the magnesite granule 4～10wt% of 0.088-0.5mm, granularity < 0.088mm ground by synthetic forsterite sand that bulk density is A obtain fine powder 17～20wt%, granularity < 0.088mm magnesia powder 4～10wt% and rice hull ash 3～7wt%, the bonding agent of the additional polystyrene spheres accounting for described thermal insulation layer raw material gross weight 0～2wt% granularity < 1mm and 5～10wt%；Wherein, described A1It is 2.3≤A1≤2.6g/cm3, described A2It is 1.8≤A2< 2.3g/cm3, described A is 1.8≤A≤2.6g/cm3。
- 2. periclase according to claim 1-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: described bulk density is A1Synthetic forsterite sand or bulk density be A2The preparation method of synthetic forsterite sand be:(1) by the magnesite tailings particles of 85～93wt% granularity < 0.2mm at 1200～1350 DEG C light-burned 0.5～5 hour, obtain calcined wagnerite tailings particles, then the silica flour of calcined wagnerite tailings particles and 7～15wt% granularity < 0.044mm is mixed, it is ground after mixing, obtains particle diameter calcined wagnerite mine tailing-quartz compound less than 0.088mm；(2) a. prepares bulk density is A1Synthetic forsterite sand: in the compound that step (1) obtains, add pore former and bonding agent, it is M that the addition of pore former accounts for the ratio of compound gross weight, 5wt%≤M≤25wt%, the addition of bonding agent is 3～12wt% of compound gross weight, then carry out mixing, mixing, 110～150MPa pressure machine pressure, dried, dried roasting 4～9 hours at 1650～1720 DEG C, are then passed through that broken namely to obtain bulk density be A1Synthetic forsterite sand；B. preparing bulk density is A2Synthetic forsterite sand: in the compound that step (1) obtains, add pore former and bonding agent, it is N that the addition of pore former accounts for the ratio of compound gross weight, 25wt% < N≤40wt%, the addition of bonding agent is 3～12wt% of compound gross weight, then carry out mixing, mixing, 110～150MPa pressure machine pressure, dried, dried roasting 4～9 hours at 1650～1720 DEG C, are then passed through that broken namely to obtain bulk density be A2Synthetic forsterite sand.
- 3. periclase according to claim 2-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: described pore former is granularity is the magnesite granule of 0.088-0.5mm.
- 4. periclase according to claim 1-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: the chemical composition of described magnesium iron sand is: MgO85～97wt%, Fe2O32～14wt%, surplus are impurity.
- 5. periclase according to claim 1-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
- 6. periclase according to claim 1 and 2-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: described bonding agent is lignosulfonic acid magnesium solution.
- 7. periclase according to claim 6-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: the concentration of described lignosulfonic acid magnesium solution is 1.05～1.25g/cm3。
- 8. periclase according to claim 7-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: the concentration of described lignosulfonic acid magnesium solution is 1.15g/cm3。
- 9. periclase according to claim 1-magnesium ferrum hercynite/forsterite composite brick, it is characterised in that: the preparation method of described composite brick comprises the following steps:(1) preparation work layer brickmaking material: prepare each raw material by working lining raw material composition, after mix homogeneously, add water reducer and bonding agent, mixing to uniform with edge runner-wet mill；(2) thermal insulation layer brickmaking material is prepared: prepare each raw material by thermal insulation layer raw material composition, after mix homogeneously, add polystyrene spheres and bonding agent, mixing to uniform with edge runner-wet mill；(3) molding, burn till: with demarcation strip bricks die separated and be divided into hot junction and cold end two parts, working lining brickmaking material is added in hot junction, thermal insulation layer brickmaking material is added at cold end, then pull out demarcation strip, it is pressed into adobe with friction press, by adobe 100～120 DEG C dry 20～26 hours in dry kiln, then fire 5～8 hours at 1500～1600 DEG C, kiln discharge.
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| CN105601254A (en) * | 2016-02-01 | 2016-05-25 | 北京大学 | Sintered water permeable brick and preparation method thereof |
| CN106045533A (en) * | 2016-06-03 | 2016-10-26 | 宜兴新威利成耐火材料有限公司 | Periclase-forsterite-carbon brick cup for iron and steel continuous casting tundish and preparation method of brick cup |
| CN107337437B (en) * | 2017-07-28 | 2019-11-22 | 武汉科技大学 | Lightweight periclase-aluminum spinel refractory material and preparation method thereof |
| CN108424125A (en) * | 2018-03-12 | 2018-08-21 | 海城利尔麦格西塔材料有限公司 | Cement kiln low heat conduction mafic spinel brick and preparation method |
| CN108395262A (en) * | 2018-04-16 | 2018-08-14 | 河南工业大学 | A kind of olivine combination magnesium aluminate spinel hollow ball castable and preparation method |
| CN111170724B (en) * | 2019-12-30 | 2022-04-12 | 武汉科技大学 | Lightweight periclase-magnesium-iron-aluminum composite spinel refractory material and preparation method thereof |
| CN113698181A (en) * | 2021-08-23 | 2021-11-26 | 郑州瑞泰耐火科技有限公司 | Low-thermal-conductivity multilayer composite magnesia-hercynite brick and preparation process thereof |
| CN115925433A (en) * | 2022-12-31 | 2023-04-07 | 海城利尔麦格西塔材料有限公司 | Forsterite composite brick and preparation method thereof |
| CN117020119A (en) * | 2023-08-15 | 2023-11-10 | 南通百炼新材料科技有限公司 | Casting method of metal casting |
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