A kind of preparation method of high temperature resistant forsterite type refractory material
An olivine-type and refractory technology is applied to the preparation of high-temperature-resistant forsterite-type refractories, and the use of nickel-iron slag to prepare high-temperature-resistant forsterite-type refractories can solve the problem of long production time, unsatisfactory performance, Issues such as restricting applications
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Embodiment 1
[0082] Mix nickel-iron slag, magnesia fine powder, and magnesium chloride solution evenly, press to form under 32KN pressure, and dry; after treatment, roast at 1360°C for 110min in an air atmosphere to obtain forsterite-type refractories.
[0083] After mixing evenly, the relationship between the components of the mixture is:
[0084] [w(MgO)+w(FeO)] / [w(Al 2 o 3 )+w(Cr 2 o 3 )]=10.97,
[0085] w(MgO) / w(Cr 2 o 3 ) = 40.69,
[0086] W(MgO)=[1.03w n (SiO 2 )~w n (MgO)] / w m (MgO),
[0087] w(MgO) / w(SiO 2 ) = 1.38.
[0088] The particle size of the ferronickel slag is 86% smaller than 0.074mm.
[0089] The particle size of the magnesia is 89% smaller than 0.074mm.
[0090] The added amount of the magnesium chloride solution is 4.5wt% of the ferronickel slag.
[0091] The concentration of described magnesium chloride solution is 1.25g / cm 3 .
[0092] Forsterite-type refractories prepared by using ferronickel slag in this example 1: the refractoriness is 1730-1780°...
Embodiment 2
[0094] Mix ferronickel slag, magnesia fine powder, and magnesium chloride solution evenly, press and form under 30KN pressure, and dry; after treatment, roast at 1400°C for 60 minutes in an air atmosphere to obtain forsterite-type refractories.
[0095] After mixing evenly, the relationship between the components of the mixture is:
[0096] [w(MgO)+w(FeO)] / [w(Al 2 o 3 )+w(Cr 2 o 3 )]=10.97,
[0097] w(MgO) / w(Cr 2 o 3 ) = 40.69,
[0098] w(MgO) / w(SiO 2 ) = 1.38.
[0099] The particle size of the ferronickel slag is 89% smaller than 0.074mm.
[0100] The particle size of the magnesia is 92% smaller than 0.074mm.
[0101] The added amount of the magnesium chloride solution is 5.5wt% of the ferronickel slag.
[0102] The concentration of described magnesium chloride solution is 1.3g / cm 3 .
[0103] Forsterite-type refractories prepared by using ferronickel slag in Example 2: the refractoriness is 1700-1750°C, the compressive strength is 77.38-80.61Mpa, and the bulk de...
Embodiment 3
[0105] Mix ferronickel slag, magnesia fine powder, and magnesium chloride solution evenly, press to form under 30KN pressure, and dry; after treatment, roast at 1450°C for 75 minutes in an air atmosphere to obtain forsterite-type refractories.
[0106] After mixing evenly, the relationship between the components of the mixture is:
[0107] [w(MgO)+w(FeO)] / [w(Al 2 o 3 )+w(Cr 2 o 3 )]=12.62;
[0108] w(MgO) / w(Cr 2 o 3 ) = 44.39,
[0109] w(MgO) / w(SiO 2 ) = 1.50.
[0110] The particle size of the ferronickel slag is 86% smaller than 0.074mm.
[0111] The particle size of the magnesia is 89% smaller than 0.074mm.
[0112] The added amount of the magnesium chloride solution is 5.5wt% of the ferronickel slag.
[0113] The concentration of described magnesium chloride solution is 1.2g / cm 3 .
[0114] Forsterite-type refractories prepared by using ferronickel slag in Example 3: the refractoriness is 1720-1770°C, the compressive strength is 129.11-132.54Mpa, and the bulk d...
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