The synthetic craft of cordierite one, preparation of raw material of raw material preparation is the process that mix raw material mill and makes semifinished product. General by 3 kinds of means: ① does a law to mix, half dry method controls base. This kind of method is unwarrantable of former division fineness with uniformity, the mineral composition that short of place designs, the normal factory like — does not use this method. ② is wet craft, be about to all sorts of raw material are put into ball mill, add water collective wet grinding, give the dehydrate of slop classics filter press that grind to become slimy cake, make slimy semifinished product via vacuum extruder again. Two footwork of ③ : Press namely wet after craft gets the materials ready, be in slimy base 1000 the left and right sides is burned gently, strike law mill again next, base is controlled after. Wet craft is in actual production commonly used: Taller to sending density to ask high pure two footwork are used when raw material. 2, firing temperature is firing temperature and sort of raw material combination and raw material purity are concerned, of cordierite make temperature range wider (1050? 1350 ℃ ) , but firing temperature range is wider (it is 30 ℃ ) about. What combination of raw material of avery kind of has a fine is firing temperature. Firing temperature also wants surely really mature to firing equipment pretties besides. Synthetic cordierite uses kiln of rotary kiln, channel and shuttle type pit commonly firing, also have those who use blaze pit. Synthesize cordierite to channel kiln and shuttle type kiln, appropriate is used long below a bit low temperature of heat preservation burn set prescription type, pour kiln in case. The cordierite that synthesizes high quality with kiln pouring blaze is fireproof clinker is impossible. Also have those who use electric frit law to produce synthetic cordierite. The firing temperature limits that enlarges cordierite is the stress that people studies all the time. Basically have 3 kinds of methods at present: ① uses the additive such as zirconium Ying Sha, BaCO3, PbSiO3. Add zirconium Ying Sha especially 15% ? 30% , but will firing limits expands to 60 ℃ , and do not affect the thermal shock stability of raw material. ② uses technology of 2 paces to calcine. Can this method be in 40? Of 60 ℃ firing compact grog gets with different heat preservation time inside limits. But technology of this method production is more sophisticated, manufacturing cost is higher, appropriate is used at making to take high-grade grog. ③ cordierite brilliant is planted law, add the cordierite fine pink with personal good synthesis in cordierite raw material namely. Cordierite brilliant is planted the law is a kind of better method. The intention that brilliant plants is deflect kaolinite forms cordierite with MgO namely after decompose (1220 ℃ ) , the change after preventing stone of mountain of on the high side to decompose thereby is Molaishi, and before fluid photograph appears, Molaishi is impossible with what contain MgO constituent to produce reaction. Add brilliant to plant still can of body of play a dirty trick firing shrinkage is reduced, coefficient of expansion drops and can drop firing temperature. 3, heat preservation time is in beautiful is firing below temperature long heat preservation is right synthesize cordierite grog function rising is very remarkable. Along with the extension of heat preservation time, cordierite generates a quantity to increase, crystallization tends perfect, constant of character and morals approachs theoretical value more, coefficient of expansion drops, but bulk density is in heat preservation after period of time (6 hours) increase not apparent. Cordierite pledges gently the preparation method of firebrick a kind of cordierite pledges gently the preparation method of firebrick, the Al(OH)3 fine pink of 24wt% of the magnesite fine pink that its feature depends on 12wt% of the grain of poriferous cordierite pottery and porcelain with 40 ～ 85wt% , 3 ～ , 6 ～ and the silica fine pink of 6 ～ 24wt% are raw material, adscititious place narrates the bond of raw material 3~10wt% , mix is even, machine pressing shapes the base substrate after; will shape again leaves dry 8~36 hour in 110 ℃ condition, be in next hour of 2~10 of heat preservation of 1300~1410 ℃ condition, get cordierite to pledge the preparation method of grain of pottery and porcelain of firebrick; poriferous cordierite is gently namely: The silica pink of the magnesite pink of the French chalk of the gangue pink 8~12wt% , Al(OH)3 pink of 33~37wt% , 8~12wt% , 13~17wt% and 28~32wt% mixes, adscititious the water mix of afore-mentioned compound 3~12wt% is even, suppress shapes the base substrate after; will shape again leaves dry 8~36 hour in 110 ℃ condition, leave hour of heat preservation 1~6 in 1300~1400 ℃ condition next firing, pottery and porcelain of will poriferous cordierite is broken after getting; of poriferous cordierite pottery and porcelain namely to the grain that is less than 8mm, make poriferous grain of cordierite pottery and porcelain. Particular executive kind is united in wedlock to make farther characterization to this invention below, be not the limitation to protecting range: To avoid to repeat, describe the preparation method of the grain of poriferous cordierite pottery and porcelain in this particular executive kind as follows first, in executive exemple no longer give uncecessary details: The preparation method of grain of poriferous cordierite pottery and porcelain is: The silica pink of the magnesite pink of the French chalk of the gangue pink 8~12wt% , Al(OH)3 pink of 33~37wt% , 8~12wt% , 13~17wt% and 28~32wt% mixes, adscititious the water mix of afore-mentioned compound 3~12wt% is even, suppress shapes the base substrate after; will shape again leaves dry 8~36 hour in 110 ℃ condition, leave hour of heat preservation 1~6 in 1300~1400 ℃ condition next firing, get poriferous cordierite pottery and porcelain namely. Hind pottery and porcelain of will poriferous cordierite is broken to the grain that is less than 8mm, make poriferous grain of cordierite pottery and porcelain. Executive exemple a kind of 1 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 50 ～ 76wt% , 6~10wt% , 12~20wt% and 12~20wt% is raw material, adscititious place narrates the waste liquid of sulphurous acid pulp of raw material 3~8wt% , mix is even, deplane in 50~100MPa pressure pressure shape the base substrate after; will shape again leaves dry 8~16 hour in 110 ℃ condition, be in next hour of 3~6 of heat preservation of 1340~1380 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 50 μ M;Al(OH)3 to be less than fine pink of silica of 50 μ M; is less than the apparent pore rate of grain of pottery and porcelain of poriferous cordierite of 25 μ M; to be 35~40% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 10~20 μ M; to compare is: 8~5mm occupies raw material 6~12wt%;5~3mm to occupy raw material 18~24wt%;3~1mm to occupy raw material 18~24wt%; to be less than 1mm to occupy raw material 8~16wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 10~20 μ M; to be 60~80MPa for intensity of compression of 1.56~1.65g/cm3; normal temperature for 30~38%; average aperture. Executive exemple a kind of 2 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 50 ～ 76wt% , 6~10wt% , 12~20wt% and 12~20wt% is raw material, adscititious place narrates the silicon collosol of raw material 5~10wt% , mix is even, deplane in 80~120MPa pressure pressure shape the base substrate after; will shape again leaves dry 12~20 hour in 110 ℃ condition, be in next hour of 4~8 of heat preservation of 1370~1410 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 74 μ M;Al(OH)3 to be less than fine pink of silica of 88 μ M; is less than chroma of collosol of silicon of 44 μ M; to be the apparent pore rate of grain of pottery and porcelain of 25~30wt%; poriferous cordierite to be 38~46% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 20~30 μ M; to compare is: 8~5mm occupies raw material 6~12wt%;5~3mm to occupy raw material 18~24wt%;3~1mm to occupy raw material 18~24wt%; to be less than 1mm to occupy raw material 8~16wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 20~30 μ M; to be 40~60MPa for intensity of compression of 1.40~1.56g/cm3; normal temperature for 38~46%; average aperture. Executive exemple a kind of 3 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 40 ～ 60wt% , 8~12wt% , 16~24wt% and 16~24wt% is raw material, adscititious place narrates the waste liquid of sulphurous acid pulp of the silicon collosol of raw material 3~5wt% and 3~5wt% , mix is even, deplane in 50~80MPa pressure pressure shape the base substrate after; will shape again leaves dry 24~36 hour in 110 ℃ condition, be in next hour of 5~10 of heat preservation of 1320~1380 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 88 μ M;Al(OH)3 to be less than fine pink of silica of 88 μ M; is less than chroma of collosol of silicon of 88 μ M; to be the apparent pore rate of grain of pottery and porcelain of 20~25wt%; poriferous cordierite to be 45~55% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 15~25 μ M; to compare is: 5~3mm occupies raw material 15~22wt%;3~1mm to occupy raw material 15~22wt%; to be less than 1mm to occupy raw material 10~16wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 15~25 μ M; to be 25~55MPa for intensity of compression of 1.29~1.40g/cm3; normal temperature for 46~54%; average aperture. Executive exemple a kind of 4 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 65 ～ 85wt% , 3~7wt% , 6~14wt% and 6~14wt% is raw material, adscititious place narrates the waste liquid of sulphurous acid pulp of raw material 5~10wt% , mix is even, deplane in 80~120MPa pressure pressure shape the base substrate after; will shape again leaves dry 12~20 hour in 110 ℃ condition, be in next hour of 4~8 of heat preservation of 1300~1350 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 44 μ M;Al(OH)3 to be less than fine pink of silica of 74 μ M; is less than the apparent pore rate of grain of pottery and porcelain of poriferous cordierite of 44 μ M; to be 35~42% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 10~20 μ M; to compare is: 5~3mm occupies raw material 20~30wt%;3~1mm to occupy raw material 25~30wt%; to be less than 1mm to occupy raw material 20~25wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 10~20 μ M; to be 50~70MPa for intensity of compression of 1.40~1.60g/cm3; normal temperature for 34~44%; average aperture. Executive exemple a kind of 5 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 65 ～ 85wt% , 3~7wt% , 6~14wt% and 6~14wt% is raw material, adscititious place narrates the silicon collosol of raw material 6~10wt% , mix is even, deplane in 50~80MPa pressure pressure shape the base substrate after; will shape again leaves dry 16~24 hour in 110 ℃ condition, be in next hour of 2~6 of heat preservation of 1300~1350 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 88 μ M;Al(OH)3 to be less than fine pink of silica of 88 μ M; is less than chroma of collosol of silicon of 74 μ M; to be the apparent pore rate of grain of pottery and porcelain of 30~35wt%; poriferous cordierite to be 48~55% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 20~30 μ M; to compare is: 3~1mm occupies raw material 45~60wt% , be less than 1mm to occupy raw material 20~25wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 20~30 μ M; to be 20~40MPa for intensity of compression of 1.28~1.34g/cm3; normal temperature for 46~55%; average aperture. Executive exemple a kind of 6 cordierite pledges firebrick reachs its preparation method gently. First the silica fine pink of the Al(OH)3 fine pink of the magnesite fine pink of the grain of poriferous cordierite pottery and porcelain with 50 ～ 76wt% , 6~10wt% , 12~20wt% and 12~20wt% is raw material, adscititious place narrates the silicon collosol of raw material 3~8wt% , mix is even, deplane in 100~150MPa pressure pressure shape the base substrate after; will shape again leaves dry 8~16 hour in 110 ℃ condition, be in next hour of 6~10 of heat preservation of 1360~1410 ℃ condition, get cordierite namely light qualitative firebrick. In this executive exemple: The bead diameter that the bead diameter of magnesite fine pink is less than the bead diameter of fine pink of 74 μ M;Al(OH)3 to be less than fine pink of silica of 44 μ M; is less than chroma of collosol of silicon of 60 μ M; to be the apparent pore rate of grain of pottery and porcelain of 35~40wt%; poriferous cordierite to be 35~40% , average aperture is the grain grading of grain of pottery and porcelain of poriferous cordierite of 10~20 μ M; to compare is: 8~5mm occupies raw material 6~12wt%;5~3mm to occupy raw material 18~24wt%;3~1mm to occupy raw material 18~24wt%; to be less than 1mm to occupy for raw material 8~16wt% . The cordierite of this executive exemple preparation pledges gently firebrick: Apparent pore rate is density of bulk of 10~20 μ M; to be 70~100MPa for intensity of compression of 1.60~1.65g/cm3; normal temperature for 30~35%; average aperture. This particular executive kind uses an applicant to apply for " material of pottery and porcelain of a kind of poriferous cordierite and its preparation method (CN201110038289.2) " patent technology is made poriferous grain of cordierite pottery and porcelain, the grain of poriferous cordierite pottery and porcelain that makes with place is aggregate, with magnesite, Al(OH)3 and silica fine pink is matrix, use magnesite and Al(OH)3 to be decomposed oneself poriferous structure is formed in matrix, the MgO that magnesite and Al(OH)3 decompose generation and Al2O3 and silica former form high pure and poriferous cordierite, the cordierite that preparation combines aggregate of poriferous cordierite pottery and porcelain with high pure and poriferous cordierite pledges gently firebrick. Make through this method the material of a preparation has high intensity and heat preservation property already, also have very good thermal shock stability and fight medium to erode ability. The cordierite of preparation of this place of particular executive kind pledges the main and chemical composition of firebrick is MgO, Al2O3 and SiO2 gently, advocate brilliant photograph is cordierite, apparent pore rate is 30~55% , average aperture is 10~30 μ M, bulk density is 1.28~1.65 G/cm3, intensity of normal temperature compression is 20~100MPa. Accordingly, the apparent pore that this particular executive kind has aggregate and matrix leads amiable hole size to be able to accuse, the environment is friendly change with the bulk after burning small the characteristic that wait, the cordierite of place preparation pledges firebrick has apparent pore to lead tall, average aperture gently small, intensity tall, thermal conductance stability of low, thermal shock is good, fight medium to erode the good point with strong capability. This light qualitative firebrick applies to working temperature the intermediate layer of the furnace of high temperature kiln under 1380 ℃ or container and working layer. Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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