Hydrophobic calcium-based magnesium synthetic clinker
A calcium-based and magnesium-based technology, applied in the field of refractory materials, can solve the problems of poor waterproofing effect and easy damage, and achieve the effect of good waterproofing effect, reducing contact and solving hydrolysis problems.
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Embodiment 1
[0022] The hydrophobic calcium-based magnesium synthetic clinker of the present invention,
[0023] The preparation process of the hydrophobic calcium-based magnesium synthetic clinker according to the present invention is carried out according to the following steps:
[0024] The ingredients by weight consist of:
[0025] Lightly burned dolomite 60% and lightly burned magnesia 40%;
[0026] Add 0.6% of ferric oxide, 0.6% of rare earth oxide and 6% of molding binder.
[0027] Rare earth oxide is CeO 2 、Pr 6 o 11 and Nd 2 o 3 A mixture of the three in equal proportions.
[0028] The forming binder is methyl cellulose.
[0029] It is pressed and formed with a 400-ton press at full capacity.
[0030] Then dry it at 100-110 temperature.
[0031] At the sintering temperature of 1630-1650°C, the two-step calcination method is used for calcination, and the holding time is 4 hours.
[0032] Experimental results:
[0033] (1) Chemical composition analysis (weight percentage...
Embodiment 2
[0040] The preparation process of the hydrophobic calcium-based magnesium synthetic clinker according to the present invention is carried out according to the following steps:
[0041] The ingredients by weight consist of:
[0042] Lightly burned dolomite 56% and lightly burned magnesia 44%;
[0043] Add 0.7% of ferric oxide, 0.7% of rare earth oxide and 7% of molding binder.
[0044] Rare earth oxide is CeO 2 、Pr 6 o 11 and Nd 2 o 3 Among the three, CeO 2 、Pr 6 o 11 0.2% each, Nd 2 o 3 0.3%.
[0045] The forming binder is methyl cellulose.
[0046] It is pressed and formed with a 400-ton press at full capacity.
[0047] Then dry it at 90-100°C.
[0048] At a firing temperature of 1610-1630°C, the usual two-step calcination method is used for calcination, and the holding time is 4 hours.
[0049] Experimental results:
[0050] (1) Test results of sintering performance and hydration resistance
[0051] Bulk density 3.5g / cm 3 , porosity 6.0%, hydration weight g...
Embodiment 3
[0054] The preparation process of the hydrophobic calcium-based magnesium synthetic clinker according to the present invention is carried out according to the following steps:
[0055] The ingredients by weight consist of:
[0056] Lightly burned dolomite 63% and lightly burned magnesia 37%;
[0057] Add 0.65% of ferric oxide, 0.8% of rare earth oxide and 6.5% of molding binder.
[0058] CeO in rare earth oxides 2 0.4%, Pr 6 o 11 0.1%, Nd 2 o 3 Three is 0.3%.
[0059] The forming binder is ethyl cellulose.
[0060] It is pressed and formed with a 400-ton press at full capacity.
[0061] Tumble dry at 105-115.
[0062]It is fired at a firing temperature of 1600-1650°C, and is calcined by the usual two-step calcination method, and the holding time is 5 hours.
[0063] Experimental results:
[0064] Test results of sintering performance and hydration resistance
[0065] Bulk density 3.6g / cm 3 , porosity 6.0%, hydration weight gain rate 0.26%.
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