Tall aluminous qualitative adiabatic brick is the Al2O3 content that controls for main raw material with aluminous alumina do not be less than the adiabatic and refractory products of 48% . Its produce craft to use bubble method, also can use burn oneself out to add content way. Tall aluminous qualitative adiabatic firebrick can be used at build by laying bricks or stones to build thermal insulation and erode without division of content of melt of intense high temperature reach erode the place of action. When be being contacted with blaze directly, the temperature of watch surface contact of general tall aluminous qualitative adiabatic firebrick does not get prep above 1350 ℃ . Mo Laishi pledges adiabatic firebrick can contact blaze directly, have high temperature resistant, intensity is high, energy-saving effect is distinct wait for a characteristic. Apply to roller of the furnace that heat up solution, hot-blast stove, pottery and porcelain kiln of drawer of porcelain of path kiln, report and the liner of all sorts of resistor furnace. The standard standard of tall aluminous qualitative adiabatic firebrick is high aluminous qualitative adiabatic firebrick is introductive this standard is pair of GB/T 3995 - 1983 " firebrick of tall aluminous qualitative heat insolation " edit. This standard and before edition is main be like next differring: -- the cent that cancelled firebrick; Changed those who produce character number to show pattern; Increased firebrick of qualitative heat insolation of tall aluminous Mo Laishi: LBrand of GM180-1.5, LGM170-1.3, LGM160-1.0, LGM150-0.8, LGM140-0.7, LGM125-0.5; Increased tall aluminous qualitative adiabatic firebrick: LG140-1.2 brand; Deleted tall aluminous qualitative adiabatic firebrick LG - 0.9, LG - 0.4 brands. This standard replaces GB/T 3995 - 1983. This standard is put forward by association of Chinese iron and steel industry. This standard place replaces all previous of standard version to release a circumstance: GB/T 3995 - 1983. This standard set range of tall aluminous qualitative adiabatic firebrick program of assess of method of requirement of size of the classification of tall aluminous qualitative adiabatic firebrick, shape, technology, experiment, quality, pack, mark, carry, store reach quality certificate. This standard applies to the firebrick of tall aluminous qualitative heat insolation that does direct contact blaze, thermal insulation and the kiln furnace liner that do not suffer stock of high temperature melt and aggressivity gas effect to use. Normative sex cites the clause in following file passes the document the cite and makes this standard provision of this standard. The citation that always fixes date, its subsequently all modification sheet (the content that does not include correct errors in printing) or revised edition all does not apply to this standard, however, encourage the just considers to whether can use these documents each new version that comes to an agreement according to this standard. The citation that always does not fix date, its are new version applies to this standard. GB/T 2992-1998 GB/T 2998 of size of general firebrick shape Boarding heat insolation is fireproof product volume density and GB/T 3997.1 of method of true porosity experiment Refractory products burns boarding heat insolation again GB/T 3997.2 of method of line change experiment Boarding heat insolation is fireproof GB/T 6900 of method of pressure test of compression of goods normal temperature Tall aluminium, clay is qualitative GB/T 7321-2004 of method of fireproof data chemical analysis Boarding is fireproof GB/T 10325-2001 of method of goods sample preparation Boarding is fireproof goods samples check and accept regular GB/T 10326-2001 Refractory products measure, exterior reachs boarding the examination method GB/T 16546 of section Refractory products packs boarding, mark, carry and store GB/T 16763 Boarding heat insolation is fireproof the classified YB/T 4130 of goods - 2005 Fireproof material Method of experiment of coefficient of thermal conductivity (discharge flat law) appearance and classification, dimension brick press cent of raw material composition to be tall aluminous Molaishi to pledge 6 brands mix adiabatic firebrick LGM180-1.5, LGM170-1.3, LGM160-1.0, LGM150-0.8, LGM140-0.7, LGM125-0.5 tall aluminous qualitative heat insolation. Among them L, G, M is aluminium respectively, lie between, not letter of Chinese Phonetic Alphabet, 140, 130 divide into equal parts fasten those who represent a brick to classification temperature (add ≤ of hot midline change the experiment temperature of 2 ％ ) before 3 digit, 1.5, the bulk density that 1.3 divide into equal parts do not represent a brick. Bricky appearance and dimension should accord with GB/T 2992-1998 " size of general firebrick shape " regulation. Also can press need square blueprint to make. The manage of technical requirement brick changes index to should accord with a watch 1, express the regulation of 2. Bricky permissible variation in dimension and exterior should accord with a watch the regulation of 3. Of experiment method brick examine make appearance undertake by GB/T 7321-2004. Chemical analysis undertakes by GB/T 6900. Of bulk density examine to undertake by GB/T 2998. Tall aluminous Molaishi pledges the manage of adiabatic firebrick changes ω of LGM180-1.5LGM170-1.3LGM160-1.0LGM150-0.8LGM140-0.7LGM125-0.5 of index item target (Al2O3) / % , 907260605548 ω of ≥ (Fe2O3) / % , 1 bulk of ≤ density / G/cm3, 1.51.31.00.80.70.5 normal temperature of ≥ compression intensity / MPa, ≥ 9.85.82.91.91.51.3 add hot midline change and experiment temperature / % (℃ ) , ≤ 1(1800)1(1700)1(1600)1(1500)2(1400)2(1250) coefficient of thermal conductivity (350 ± 25) ℃ / W/ (M · K) , the manage of 0.800.600.370.260.230.20 tall aluminous qualitative adiabatic firebrick changes ≤ ω of LG140-1.2LG140-1.0LG140-0.8LG135-0.7LG135-0.6LG125-0.5 of index item target (Al2O3) / % , 48 ω of ≥ (Fe2O3) / % , 2 bulk of ≤ density / G/cm3, 1.21.00.80.70.60.5 normal temperature of ≥ compression intensity / MPa, ≥ 4.54.03.02.52.01.5 add ≤ of hot midline change the experiment temperature of 2% / ℃ 140013501250 coefficient of thermal conductivity (350 ± 25) ℃ / W/ (M · K) , the permissible variation in dimension of 0.450.380.320.300.250.20 bricks of ≤ and exterior unit are 100 ± of ≤ of dimension of permissible variation in dimension of LGLGM of millimeter item target 0.8 dimension of 1.5 ± 250 ± of 101 ～ 1 dimension of 2 ± 400 ± of 251 ～ 1.5 twist of 3 ± length 25010.8 length of 101 ～ 251 ～ length of 4001.51.0 edge damage (＋ of A ＋ B. Qualitative adiabatic firebrick should grind tall aluminous Molaishi make treatment. Tall aluminous qualitative adiabatic firebrick can be ground by agreement of both sides of supply and demand make. Of intensity of normal temperature compression examine to undertake by GB/T 3997.2. Add what hot midline changes to examine to undertake by GB/T 3997.1. Of coefficient of thermal conductivity examine to undertake by YB/T 4130-2005. The examination of bricky dimension, exterior and section undertakes by GB/T 10326-2001. Series of quality assess program approves a brick to should undertake by same brand group batch, every batches do not exceed 50t. Sample those who reach brick of regulation of decision of acceptance sample with check and accept T 10325 of the ／ that press GB, 2001 undertake. Intensity of compression of bulk density, normal temperature, add hot midline to change melt into checks and accept a project. When answer check sentence established rule or practice to press GB ／ T 10325, 2001 undertake, among them the tolerance of a sample should accord with a watch the regulation of 4. Assess of qualification of eligible assess form can use the Fang Shengming that offer money, use just be maintained or undertake by the form of tripartite attestation. The sheet when answer check is worth density of bulk of tolerance project tolerance + intensity of compression of 0.03g/cm3 normal temperature - 0.2MPa adds temperature of hot midline change - 20 ℃ are packed, carry, store reach mass of certificate brick pack, mark, carry and store should press GB/T 16546; Special situation by for, need both sides to agree separately. When the product is given out, should with the quality certificate that for square quality supervisory branch signs and issue, carry bright: For square name, want square name, deliver goods date of number of name of size of date, contract, product, applicable level, brand, brick and manage change index to examine to wait as a result. 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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