Aggregate of aluminium magnesium brick uses one class alumina commonly, powdery makings uses pink of fancy and aluminous grog and noodles or vermicelli made from bean or sweet potato starch of one class magnesia, use tall modulus water glass to make bond, the microtherm processing of the classics after suppress is finished product namely. This brick is used on the bag of big, medium-sized steel of modular casting, its life is 60~90 commonly second.
Brick of aluminium magnesium carbon is the new breed that develops in last few years, the success is developed on the foundation of aluminium magnesium brick and magnesian carbon brick. Its produce craft and magnesian carbon brick kind with, water glass combines brick of aluminous Zuo carbon, use one, grog of 2 class alumina makes fireproof aggregate, one class or fancy tall aluminium powder make fireproof pink material, and of sophisticate 8%~13% one, pink of magnesia of 2 class metallurgy, carbon material uses black lead of record of electrode pink, land or Zuo piece black lead, its dosage 3%~8% , use = 4~3 of water glass solution, 0) makes bond, the microtherm processing of ℃ of 200~250 of the classics after shaping is finished product namely, see from inside expressing 3-7, what water glass combines brick of aluminium magnesium carbon is fireproof degree for 1770 ℃ , temperature of 4% loading bate is 1320~1340 ℃ , because bond takes what cause into more Na2O,this is. If use Zuo modulus water glass to take Na2O less, loading bate temperature carries Zuo to be 1410 ℃ , , fireproof spend 1790 ℃ . This kind of brick is better because of function, the price is low, reason gets applied generally on bag of medium, little steel, this brick applies on bag of modular cast steel, division of broken bits line is built with build by laying bricks or stones of magnesian carbon brick, its life is 50~100 second.
Raw material uses one level or fancy and aluminous grog, Bai Gangyu, inferior Bai Gangyu and magnalium pointed spar make aggregate and powdery material, makings of magnesian qualitative pink uses the magnesia of high quality agglomeration of MgO>95% or electric frit magnesia, at the same time mix into adds small pink of scale black lead, high quality carborundum and oxidation aluminium powder or SiO2, use bond of phenolic aldehyde colophony to shape via high pressure, adobe controls low processing to be finished product namely via 200 ℃ again. This brick has good strength, fight aggressivity, fight flake, heatproof shake sex and do not stick the good point such as broken bits, but thermal conductance is bigger, when using, need to take adiabatic step.
The magnesia of high quality agglomeration of 95% or electric frit magnesia, at the same time mix into adds small pink of scale black lead, high quality carborundum and oxidation aluminium powder or SiO2, use bond of phenolic aldehyde colophony to shape via high pressure, adobe controls low processing to be finished product namely via 200 ℃ again. This brick has good strength, fight aggressivity, fight flake, heatproof shake sex and do not stick the good point such as broken bits, but thermal conductance is bigger, when using, need to take adiabatic step.
Direct in brick of aluminium magnesium carbon mix into adds aluminium magnesium pointed spar to close firing makings, add than mix into magnesian (pointed spar is formed with alumina in use process) the effect is good. Pointed spar of synthetic aluminium magnesium should be commonly in rotary kiln agglomeration, is spent should be more than 1600 ℃ , temperature is higher, quality is better. Its bulk density is 2.95~3.10g/cm3, aluminium magnesium content should is more than 91% . Price of spar of of electric frit magnalium is more expensive. To ensure bricky quality should choose appropriate magnalium pointed spar.
Colophony combines brick of aluminium magnesium carbon to be in the enterprise such as treasure steel, saddle steel, Wu Gang and dance steel wider application ever received on cast steel bag repeatedly. Go up with 50~IOOt steel bag in Lian Zhu, use intermediate brick of aluminium magnesium carbon makes liner, division of broken bits line is built with Chang of brick of high quality magnesian carbon, average service life is 50~80 second, be as high as 100 for many times.
20 centuries 90 time, finery liner is manier already use division of line of brick of carbon of high quality aluminium magnesium, broken bits to use magnesian carbon brick, 50t LF-VD fine surrounds life 30 times above, the service life of 40~90t LF(V) is controlled 50 times.
The manufacturing technology of magnalium carbon brick and brick of aluminium magnesium carbon is basic and same. It is in electric frit magnesia mix into is entered synthesize pointed spar beforehand, the character that uses difference of coefficient of both linear expansion (pointed spar 7. 6Xl0-6 ℃ - 1, i3 of square magnesian stone. 5X106 ℃ - 1) , micro-crack is formed in use process of Zuo gentle refrigeration, the thermal stress that amortize produces because of temperature change, reduce heat to flake because & is pointed spar (MA) and square magnesian stone (the stretch model of M) measures six to one, former (0. 012~0. 022) X L06MPa, latter (0.059~0.49) X106MPa. Have the pointed spar of tenacity, conduce to the heatproof shake sex that raises a brick. Together with is in square magnesian stone - carbon is added to expect again in pointed spar (add the black lead of about 10% ) all distributings after bricky body, atom of the carbon below high temperature forms crisscross network structure, make material has good high temperature capability. And the exterior tension of black lead wet part of big, embellish is small, prevent slaggy osmosis effectively.
For example: Nanjing steelworks 75LF wraps line to use magnalium carbon brick: MgO Al2O3 13% , c 10% , apparent pore is led 3% , SOMPa of intensity of compression of bulk density 3.0Sg/Cm3, high temperature is fought lose strength (1400 ℃ ) 8MPa, position of broken bits line uses brick of high quality MgO-C, service life 50 furnace above. Zhengzhou flourish fills fireproof material to regard manufacturer of the adventitious of high quality fireproof material as the home, have rich manufacturing experience and practice base, stand in the forward position that the industry expands from beginning to end, pay attention to innovation of science and technology, increase the development strength to new product ceaselessly, in ensuring flourish fills material to be able to apply to more furnace kiln projects, bring good news for more projects. Flourish fills network of fireproof material official: Http://www.glzcj.com
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