To make full use of SiO2 content is the tall silicon magnesia of 5~11% , the manufacturing technology that uses production magnesia brick can make magnesian silica brick. With firing as a result of,what magnesia brick differs is magnesian olivine (M2S) not easy agglomeration, because of this magnesium silica brick firing temperature should rise appropriately.
Of magnesian silica brick firing temperature is 1550~1570 ℃ .
Make magnesian calcic brick
To make full use of magnesian stone of tall calcic water chestnut, can make magnesian calcic brick.
The manufacturing process cent of magnesian calcic brick is mixed for clinker preparation make a brick two processes. Arenaceous grog of preparation magnesian calcium, calcic silicon should be controlled to compare when burden (C/S) between 2.2~3.0, al2O3 should is less than 2% , join 0.3% apatite to make stabilizing agent at the same time, join pink of 0.5~0.7% iron concentrate to make mineralizer.
Concentrate of magnesian stone of will tall calcic water chestnut, apatite, iron is ground in the canister in proportion grind in all inside machine. Granuality requirement: The fine pink of <0.088mm is more than 90% . After powdery makings classics becomes a ball, be inside rotary kiln firing.
Make raw material with tall calcic magnesia, with firing the manufacturing technology of magnesia brick makes a brick, firing below 1600~1680 ℃ , can make tall calcic magnesia brick.
Production magnalium brick
5~10%Al2O3 is joined to be able to be made in agglomeration magnesia magnalium brick. The form with industrial alumina or tall aluminous aluminous grog joins A12O3 in fine pink.
If introduce Al2O3 with earth of tall aluminous Ji, situation also should introduce the impurity such as SiO2 at the same time, what drop product consequently is fireproof spend and high temperature intensity. So alumina joins a quantity to should not be too big.
The craft parameter of production magnalium brick and magnesia brick roughly close. It is firing only what temperature wants to compare magnesia brick commonly is firing ℃ of temperature tall 30~50, amount to 1750~1800 ℃ .
Make square magnesian Shi Yimei brick of aluminous pointed spar
Use C/S ratio to make bricky magnesia and agglomeration magnalium top for the one class of 0.4 spar is arenaceous for raw material, grain is critical granuality is 3mm. Magnesia granuality uses the big grain of 3~1mm, of <1mm in the fine pink of grain and <0.088mm makes 3 class burden. Make bond with waste liquid of sulphurous acid pulp, with wet grind machine mix practice, 300t attrition presses bricky machine to shape. After base substrate classics is dry, firing below 1560~1590 ℃ . Firing weak oxidation atmosphere should be controlled in the process.
Square magnesian stone - the function of high temperature machinery of pointed spar brick and excel of thermal shock stability are common magnalium brick. Intensity of compression of its normal temperature is 70~100MPa, thermal shock stability (1000 ℃ , water-cooling) 14~19 second. Square magnesian stone - applicable of pointed spar brick is mixed at the high temperature area of active lime rotary kiln cement rotary kiln.
Make firing oily dip is magnesian dolomite brick
It is with MgO content 95% or of 98% above high pure magnesia and magnesian dolomite are arenaceous for raw material, its broken, after smashing, reserve. Stock of the grain in mixing big grain heats constant temperature, those who add certain amount is medium Wen Liqing (olefin solution or random polypropylene) , via fine white is being joined after agitate, after mixing, with attrition the machine that press a brick shapes, and at 1600~1650 ℃ firing.
Will firing undertake dip;burst;ulcerate;festers in the bricky warm-up, pitch that after undertaking vacuum is handled, finishs in high temperature condition namely, cool next to normal temperature.
Brick of pointed spar of production synthesis magnesian chromium
With reacting beforehand magnesian chromium is arenaceous it is raw material with magnesia, make bond with bittern, can make brick of magnesian chromic pointed spar. Its burden falls for instance: React beforehand magnesian chromium is arenaceous (granuality <0.066mm) 30% , magnesia (granuality <3mm) 55% , magnesia (granuality <0.088mm) 15% , adscititious bittern 3% . Stock is used wet grind machine undertake mixing practice, order of feed in raw material: → of bond of grain makings → is fine pink, the time that mix practice not less than 10min. With 260t attrition the machine that press a brick shapes, control of base substrate density is in 3.05g/cm3, apparent pore rate is more than 16% . After base substrate classics is dry, firing below 1600 ℃ .
The physical performance of goods is as follows: Apparent pore is led 15% , bulk density 3.09g/cm3, 86MPa of intensity of normal temperature compression, loading bate temperature is more than 1700 ℃ , thermal shock stability (1100 ℃ , water-cooling) 7.
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